Quimica - Chemical: Enantiomers /enantiomeros

Quimica - chemical: Guide de création de mannequins en silicone - version 2009 courte

Quimica - chemical: Google G1 T-mobile G1 HTC Dream Android Silicone Skin Case

Quimica - chemical: Mold and Part Making- Brushable Silicone, Spray Hard-Coat, Flexible Urethane Foam

Quimica - Chemical: Ciclo del Fósforo

Quimica - Chemical: Ciclo del Carbono

Quimica - Chemical: Formation of tin crystals

Quimica - Chemical: Ciclo do carbono e efeito estufa

Quimica - Chemical: nitrogeno liquido vol2

Quimica - Chemical: H2SO4 (sufuric acid) + KMnO4 (potassium permanganate)

Quimica - Chemical: Ciclo del azufre

Quimica - Chemical: Detección de oxígeno disuelto en agua

Quimica - Chemical: Introduction to Chemical Engineering | Lecture 1

Quimica - Chemical: Introduction to Chemical Engineering | Lecture 1

Quimica - Chemical: Electroplating

Quimica - Chemical: Copper Sulphate: The Movie

Quimica - Chemical: Zinc/copper galvanic cell

Quimica - Chemical: Testing for unsaturated hydrocarbons

Quimica - Chemical: Formation of silver crystals

Quimica - Chemical: pilha / pila daniel

Quimica - Chemical: PVC Foam

Quimica - Chemical: PVC pipe extrusion

Quimica - Chemical: Wood-Plastic-Composition Production Line

Quimica - Chemical: Lego Style Silicone Rubber Memory Card Case

Hong Kong based Best Rubber Product Ltd. sent us just word about their new silicone rubber SD and Sony Memory stick keychain cases. Because they are kind of neat, I decided to report about them.

The rubber cases are shaped like Lego bricks and can also be stacked together to store several SD cards or Memory sticks.
These cases are still prototypes. Best Rubber Product Ltd. is looking for customers/distributors for them.

Quimica - Chemical: Automatic Polyurethane Tube Recutter

Quimica - Chemical: Maps of the Russian's Gas control in Europe

Quimica - Chemical: Tesla2 secondary coating

Quimica - Chemical: Vuurwerk in plastic buis.

Quimica - Chemical: Silicone and Rubber

Quimica - Chemical: Cesium Metal

Dow Corning Silicones energy efficiency of the windows

Basically, silicones that are or are intended to have contact with food must meet the following specifications:

1) Silicones have to transfer their constituents to foods in quantities that can harm people's health and cause an unacceptable change in the composition of the food or alter the characteristics organoléticas of it.

2) They must be manufactured according to a System for Quality Assurance (ISO 9002 for example) and under the terms set forth in facilitated in the listing document of the Resolution (substances, and authorized additives).

3) The interaction between the substances for the manufacture of silicones should not generate substances that cause damage in people.

4) To prevent the formation of cyclic polydimethylsiloxane with phenyl groups, can not be used as the starting substances, which have linear siloxanes and phenyl methyl groups in the same atom or containing two methyl groups on the same silicon atom (siloxanes and silicones, methyl, phenyl, dimethyl).

5) The migration / emission of any substance from the silicone into the food has to be as low as technically possible. The total quantity of substances that may migrate is 10 milligrams per square decimetre area of material or 60 milligrams per kilogram of food. This is considered as the limit of global migration and coincides with the limit imposed by the directive on plastics in contact with food.

6) It should meet the specific migration limits specified in the technical paper of the resolution on silicones.

7) Migration tests must be carried out following the directions of the Directives 82/711/EEC, 85/572/EEC, 2002/72/EC and its future amendments unless it is technically impossible because of the nature Material and the migration test.

8) It must ensure a proper labeling of the product, if necessary, pre by the user.

In the case of children's products made with silicone and intended to come into contact with food, as in the example of teats for a bottle, also has to comply with specific regulations, especially regarding the content of volatile metal migration and specific migration of certain antioxidants.

Quimica - Chemical: Masters de pigmentos de siliconas con aplicaciones en sellantes de siliconas, Holland Colours

Efficiency, flexibility, and cost-effectiveness Colouring sealants has never been this efficient. We offer our partners the most efficient and cost-effective colouring solutions for the four most common sealants on the market.
We’ve created colouring pastes that will give you the same outstanding performance in automatic or semi-automatic mixing systems. And they’re also suitable for manual mixing.
Colour Consistency You want to know that you will get the same colour with every production run, and that’s what you will get with Holland Colours sealant colorants.
Quality, Experience, and Service With a quarter century of experience in the market, we know and understand your needs. We’ve also worked with all the major suppliers of dosing equipment. Whether you need support selecting the appropriate product, you’re looking for a custom colour or a specific viscosity, or you need technical assistance with production, we stand ready to provide you with the service you need. Global Presence We’ve got a global network of sales and technical service offices. Ready to respond to your call. In person, if that’s what it takes.
For more information on colouring of various sealants click on: Silicone sealants Organic sealants Acrylic sealants Plasticizer-free silicone sealants

Quimica - Chemical: Silice precipitada de Madhu con aplicaciones en cauchos de silicona (silicone rubber)

	>>> Product Specifications MSDS
	MFIL - P(S) ( HTV Silicon Applications )
	End Properties Improves processibility of raw mixture. Offers resistance to heat aging. Minimises crape hardening. Provides superior resilence and compression set.
Packing Method	LDPE liners wrapped with laminated HDPE
Shipment	NET WEIGHT PER BAG (KGS)	SHIPMENT ( MT )
		TRUCK LOAD	CONTAINER LOAD
			UNPALLETISED		PALLETISED
	20.00	5.0	20’ FCL	40’ H.C.FCL	20’ FCL	40’ H.C. FCL
			4.75	11.0	3.84	9.60

Quimica - Chemical: Silice precipitada de Madhu con aplicaciones en plásticos

	>>> Product Specifications MSDS
Grades	MFIL - 300, ABSIL - 100(I)
	End Properties MFIL-300 Silica acts as a Micro-Rough surface, Improves Mold Release Prevents surface sticking of Plastic Films, Enhances Film Openability And Processibility Improves Film Optical Properties Prevents Plateout phenomena in PVC Formulations ABSIL-100(I) Can replace Imported Minerals / Fillers in Plastic Master Batches with Good Economy and Antiblocking effect.
Packing Method	LDPE liners wrapped with laminated HDPE
Shipment	GRADE	NET WEIGHT PER BAG (KGS)	SHIPMENT ( MT )
			TRUCK LOAD	CONTAINER LOAD
				UNPALLETISED		PALLETISED
				20’ FCL	40’ H.C.FCL	20’ FCL	40’ H.C. FCL
	MFIL -300	10.00	4.50	4.50	9.00	4.00	8.00
	ABSIL -100 (I)	25.00	9.00	13.00	26.00	12.80	25.60

Quimica - Chemical: Banana Designer Rubber Door Stopper Doorstop

Quimica - Chemical: Holland Colours: Master de pigmentos de silicona aplicados en caucho de silicona

Holcosil IP

Cost? Colour consistency? Custom colours? Customer specific viscosity? There’s one answer — Holcosil IP. Holland Colours has the solution for colouring silicone sealants. With high pigment loading and excellent dispersion, so you can use less material and cut your costs. To give you a leg up on the competition.

Holcosil IP pastes are de-gassed, rheologically controlled, and highly suited for automatic dosing applications. But if you need a custom colour or if our standard viscosity is not appropriate to your application, we can produce a made-to-order colorant that will fit the bill. Holcosil IP is also used for colouring B-components or hardeners of RTV2 products.

Standard colours Click here to view our standard colours.

Custom colours Click here to tell us what you are looking for. One of our sales specialists will contact you to discuss the possibilities.

Here you can down load our technical flyer Coloring Solutions for Silicone Sealants (PDF)

Quimica - Chemical: Laser Scriptor - Laser Marking Additive for metal

Expoquimia'08 Temexin

Quimica - Chemical: XXL Bio - Catalyst vs Additive - Test #1 (Diesel)(shortened)

Quimica - Chemical: Laser Scriptor - Laser Marking Additive for ceramic

Quimica - Chemical: Laser Marking Additive Video Process

Quimica - Chemical: ABS Revitalization Program for RBC

Quimica - Chemical: ABS Revitalization Program for SBR

Quimica - Chemical: Introduction to Solid State Chemistry

Quimica - Chemical: Tensile Testing of HDPE

Quimica - Chemical: Master de pigmentos de silicona con aplicaciones en caucho de silicona (LSR)

The liquid silicone rubber (LSR) market is booming for applications in sectors such as the automotive, electronics, and household appliance industries. We’ve got the product - Holcosil LSR - for most LSR applications. And with our global production and service network, you are assured of worldwide availability and reproducibility. Holcosil LSR is also used for colouring polyaddition cured RTV2 products.
Responsive to your needs Fast turnaround — for orders under 200 kgs, shipment possible within 2 days Quantities from 1 kg Custom colours Available in FDA (Food and Drug Administration) and German BfR (Bundesinstitut für Risikobewertung)-compliant versions Suitable for high-end technical applications
Standard colours Click here to view our standard colours.
Custom colours Click here to tell us what you are looking for. One of our sales specialists will contact you to discuss the possibilities.
Here you can down load our technical flyer Coloring Silicone Rubbers (PDF)

Quimica - Chemical: Bergkamp Inc. — Micro Surfacing Process Añadido 02:49 [TRADUCIDO] Bergkamp Inc. — Micro Surfacing Process Bergkamp Inc. — Micro S

Quimica - Chemical: desenvolveu um projeto para a coleta de agua da chuva.

Quimica - Chemical:Nucleophilic Addition Reaction

Quimica, Chemical:China Plastic Recycling Machine, Extruder, Crusher Manufact

Quimica - Chemical: SN1 reaction

Quimica - Chemical: Nucleophilic Substitution : SN1 and SN2

Quimica - Chemical: SN2 reaction

Quimica - Chemical: Electrophilic Aromatic Substitution

Quimica - Chemical: BPA in Plastic Bottles WARNING

Quimica - Chemical: Organic Chemistry: Nucleophile and Electrophile

Quimica - Chemical: Markovnikov's rule

Quimica - Chemical: Organic Chemistry: SN1 nucleophilic substitution

Quimica - Chemical: plastic packaging products

Quimica - Chemical: Industrial Process Plastics Mixers -- What You Need To Know

PE pipe production line/plastic machinery

Quimica - Chemical: Plastics' Safety Questioned

Quimica - Chemical: RUDIZ RUNNERLESS SYSTEM

Quimica - Chemical: Rubber Sheet Preformer

Quimica, Chemical: Halogenated flame retardants

While the environmental impact of halogenated flame retardants continues to be scrutinized, both brominated and chlorinated flame retardants used in PA are expected to continue to have good growth, say suppliers. The polymeric brominated flame retardants typically used in PAs are not extracted from the polymer matrix, reducing concerns about their environmental effect. OxyChem's Dechlorane Plus® chlorinated alicyclic compound is non-blooming and does not form chlorodibenzodioxins or furans. Dechlorane Plus® has good thermal stability and can be processed up to 320°C.

Great Lakes introduced a new brominated polystyrene, Firemaster BP411, for electrical components in January 2004. Albemarle recently introduced Saytex HP-3010, a brominated polystyrene with improved colour stability, thermal stability, and high flow. The new product is targeted for high-temperature polyamides and high-flow applications such as complex, thin-wall parts, notes Sam Thomas, flame retardants global business manager for connectors at Albemarle Corporation. ICL Industrial Products, formerly the Dead Sea Bromine Group, recently introduced F-3100, a high molecular weight polymeric brominated flame retardant for glass-reinforced engineering resins. The product is expected to reduce energy consumption during compounding and pressure during injection moulding, as well as have good melt flow during recycling, says the company. ICL-IP has also introduced the SaFRon 5500 series, proprietary polymeric flame retardants with anti-drip properties, and SaFRon 5251, a dust free polymeric flame retardant for improved conveying and feeding. These products have a processing-aid effect, enabling lower processing temperatures and enhancing melt flow, notes ICL-IP.

Great Lakes' Firemaster CP-44HF flame retardant was originally developed in 2003 to provide higher thermal stability and flow. With the movement to lead-free solder, the product has now been shown to offer improved blister resistance due to its compatibility with HTPA resins. Traditional flame retardants such as brominated polystyrene tend to form blisters on the part surface at the higher temperatures used during lead-free soldering. Blistering occurs because the flame retardant is not completely dispersed through the polymer, but clusters in flame retardant domains where moisture collects and then expands when exposed to high temperatures. Firemaster CP-44HF is a co-polymer of di- and tri-bromostyrene with glycidyl methacrylate. The methacrylate functionality allows greater bonding and compatibility of the flame retardant with the host resin, resulting in improved dispersion and elimination of the flame retardant domain, explains Mr. Andrews.

Quimica - Chemical: plastic recycling machine--pelletizer/granulator

Quimica, Chemical: Flame Retardants: Retardadores de llama para poliamidas - los nuevos acontecimientos y se refiere a la transformación

Poliamidas (PA) son las resinas de ingeniería, a menudo de fibra de vidrio reforzada, que presentan alta resistencia en un amplio rango de temperatura, desgaste y resistencia a la abrasión y resistencia química. Estas propiedades mecánicas poliamidas permitir el uso en una amplia gama de aplicaciones de alto rendimiento en la automoción, aparatos eléctricos y electrónicos y los mercados industriales. Muchas de estas aplicaciones debe ser ignífugo. En poliamidas, de la elección de los retardadores de llama paquete depende de varios factores, entre ellos el complejo de procesamiento de la temperatura y la estabilidad térmica necesaria en la parte final. El retardador de llama del costo y su efecto sobre la retardador de llama, mecánicos, eléctricos y de propiedades de flujo también se consideran.
Firemaster de los Grandes Lagos se utiliza en los componentes eléctricos.

Como en general el mercado retardador de llama, hay un deseo de sustituir los retardantes de llama halogenados en poliamidas con halógenos alternativas. Esta tendencia está impulsada principalmente por los OEM "deseo de tener una imagen del medio ambiente y las preocupaciones acerca de la normativa europea de residuos de aparatos eléctricos y dispositivos de eliminación (RAEE), lo que requiere un tratamiento separado de las piezas que contengan halógeno. Sin embargo, estableció con su uso y buena relación coste-rendimiento, los retardantes de llama halogenados son aún ampliamente utilizados en AP. Halogenados productos incluyen polímeros retardantes de llama bromados y de la OxyChem alicíclicos compuestos clorados. Retardantes de llama halogenados se utilizan normalmente con sinergistas tales como el óxido de antimonio o compuestos de zinc. No los retardantes de llama halogenados poliamidas para incluir fósforo rojo, melamina-y productos a base de hidróxido de magnesio. Nueva fósforo basados en los retardantes de llama tratar de resolver los inconvenientes de estos más tradicionales no halógenos. Nanoclays están empezando a encontrar su uso como anti-goteo de agentes retardantes de llama en los paquetes.

La creciente necesidad de mejorar la estabilidad térmica en muchas aplicaciones, está impulsando el crecimiento de la alta temperatura de poliamidas y el uso de retardadores de llama con mayor estabilidad térmica. En Europa, la alta temperatura de poliamidas (HTPA), un segmento de la poliamida de alto rendimiento (HPPA) del mercado, se espera que tengan un 12% de tasa de crecimiento compuesto anual entre 2003 y 2010, EE.UU. predice de consultoría Frost & Sullivan en un informe de agosto 2004 . En la electrónica, la continua tendencia a la miniaturización está impulsando el crecimiento HTPA. La Unión Europea de reducción de sustancias peligrosas (RoHS) Directiva surta efecto en 2006 y los mandatos que los fabricantes de electrónica de cambiar a sin plomo sistemas de soldadura. Porque sin plomo soldadura de los sistemas de ejecutar normalmente 30-50 ° C superior a los sistemas tradicionales de plomo, los fabricantes deben utilizar tanto los polímeros y aditivos de polímero con una mayor estabilidad térmica. Moldeadores tienden a proceso a temperaturas incluso superiores a las utilizadas para la composición en un intento de aumentar el rendimiento de producción, aumentando aún más la necesidad de retardantes de llama estabilidad térmica. La estabilidad térmica es también importante para el reciclaje en la planta regrind.

Como convertirse en partes más pequeñas, los materiales necesitan tanto una mejor estabilidad térmica y mayor flujo de propiedades. Retardantes de llama varían en sus características de flujo y tener un impacto material sobre el final del flujo de bienes, señala Joe Andrews, director global de marketing en los Grandes Lagos Chemical Company. Chip también aumenta la densidad con la parte miniaturización, es decir, un material de propiedades eléctricas cada vez más importante. El tipo de ignífugo utilizado tiene una gran efecto sobre el índice de seguimiento comparativo (CTI), lo cual indica la susceptibilidad relativa de los polímeros bajo eléctrico estrés para convertirse en conductora en la parte de superficie y encender. Superior CTI permitir valores más bajos espesores de pared, que requieren una buena corriente de propiedades, notas Compositor PolyOne. PolyOne introducido recientemente de alto flujo, halógenos y fósforo libre, retardador de llama, Bergamid ® PA6 y PA 6 / 66 compuestos para aplicaciones eléctricas.

Los OEM y los transformadores se enfrentan con la reunión más duras y más duras las especificaciones de la llama retardancy y las propiedades físicas, dicen expertos de la industria. Muchas industrias están mostrando una preocupación creciente para la seguridad contra incendios. Muchos de los productos a los que anteriormente tenía que cumplir sólo la clasificación UL94 V2 ahora deberán cumplir las más restrictivas de clasificación V0. Además, muchas aplicaciones también deben pasar una revisión de Halo Wire Inflamabilidad Temperatura de prueba (GWIT), que es más restrictivo que el anterior Halo Wire prueba. En aplicaciones eléctricas y electrónicas, el índice térmico relativo (RTI), CTI y GWIT se están convirtiendo en importantes pruebas para considerar al diseñar un producto.

Quimica - Chemical: PE pipe production line/plastic machinery

Quimica, Chemical: silicone rubber bracelets

Kulayful is the home for attractive, high quality customized silicone rubber bracelets and wristbands similar to livestrong bracelets, at the lowest possible price available in the market.

Quimica, Chemical: china plastic machinery-qingdao yasu machinery

La rivoluzione plastica - Plastica Biodegradabile - Parte Terza

Quimica - Chemical: La rivoluzione plastica - Plastica Biodegradabile - Segunda Parte

Quimica - Chemical: La rivoluzione plastica - Plastica Biodegradabile - Parte Prima

Quimica, Chemistry: Substances traditional flame retardants

The first ignifugantes substances that were used in plastics were halogenated compounds (based on organic compound containing mainly Bromine and chlorine) and organophosphorus compounds. The mechanism of action of this compound se basa en act as "catchers" radicals high energy produced by burning substances.
A separate group is made up of other inorganic compounds that contain a significant percentage of water hydration such as trioxide Aluminum (Al (OH) 3) and magnesium hydroxide (Mg (OH) 2). From these compounds can be formulated halogen-free materials. However, it requires high concentrations (greater than the 30-40%) to reach an adequate cooling able to inhibit the ignition, and once the water is released, the plastic again be flammable.

In this regard, it is important to consider both types of flame retardant incorporated in very high percentages also affect the process and the physical and thermal properties of the material, such as fluency, temperature bending under load (HDT), resistance traction and resistance to impact.

In addition to the previous ignifugantes, also used Antimony oxide for its synergistic effect with halogenated compounds and other agents as flame retardants boric acid or zinc borate.

The choice of ignifugante to use, depends largely on the plastic matrix to change, and must reach a balance between the required properties to the material and its reaction to fire. In general, you should use more than one type of ignifugante to influence all those factors acting on the mechanism of a fire. Following is a table summarizing the main mechanisms involved, depending on the type of ignifugante employee, as well as the parent plastic in which are more effective.

Quimica, Chemical: Do You Have A Case On Your Phone or iPod?

Quimica - chemical: The Silicone was created for Berzelius

The Silicone

Inventions that changed the course of humanity.
Jöns Jacob Berzelius
It was the first analyst Siglo XIX: in addition to carrying out as precisely as a huge number of analysis, we must attribute the discovery of several bodies simple: Hisinger and Berzelius discovered the element cerium in 1807, in 1817 identifies with Johan Gottlieb Gahn selenium, and as the third and final discovery thorium in 1829. His students discovered two other elements: in 1817 Johann August Arfvedson discovers lithium, and in 1830 Nils Sefström Gabriel discovers vanadium. Berzelius was who proposed the names of lithium and vanadium, as well as sodium. It was the first chemist who isolated the silicon (in 1823), zirconium (in 1824), thorium (in 1828) and titanium.

He studied combinations of sulfur with phosphorus, fluorine and fluoride, found a large number of chemical equivalents. It was practically the creator of organic chemistry. He introduced the concepts and words alotropía, catalysis, isomería, halogen, organic radical and protein. As philosopher as experimenter, consolidated the atomistic theory as well as the proportions of chemical invented and made universally accepted chemical formulas similar to the algebraic formulas with the aim of expressing the composition of the bodies. To explain the phenomena adopted the famous theory of dualism electro-chemical, and with this theory carried out many reforms in the nomenclature and classification. It was the precursor and developed a theory about the electrochemical and unites radicals. He also was among the first to mineralogy based on knowledge of the chemical elements of the bodies. The current system of chemical notation was adopted thanks to Berzelius, who was the one who proposed it in 1813. Berzelius was among the first who published a table of the atomic and molecular masses with acceptable accuracy.


Born in Väversunda Sörgård near VADSTENA in 1779, the son of a schoolteacher. He began studying medicine in 1796 at the University of Uppsala, while working at the chemistry lab of Johan Afzelius. This made him decide about chemistry. Soon began to experiment. Already in 1800 highlighted by his remarks about mineral waters of Medevi. He completed studies in Chemistry at the same time as those for Medicine, and received his Ph.D. in 1802.

Attempting to balance his work as a physician and assistant professor until 1806, when he became responsible for the courses of Chemistry of the Military Academy Carlsberg. Began publishing in 1806, along with Wilhelm Hisinger, some memories relaticionadas with physics, chemistry, minerologís. Between 1807 and 1831, was Professor of Botany, Medicine and Pharmacy in Stockholm, while still giving classes at the Institute of Chemistry Medical-Surgical Karoline Stockholm, between 1815 and 1832.

Berzelius was Permanent Secretary of the Royal Swedish Academy of Sciences, which was a member since 1808, between 1818 and 1848 and associated with the Royal Society and the Institut de France, and a member of the Swedish Academy between 1837 and 1848. In 1832 left teaching to be able to devote himself entirely to research. In 1835 he married, and is named Freiherr (equivalent to the title of Baron), as a wedding gift by King Charles XIV of Sweden. For his work won the Copley Medal in 1836. He died in Stockholm in 1848.

Quimica - Chemical: come fare lo stampo in gomma siliconica resina

Quimica - Chemical: Shinagawa de procesamiento de caucho GOMUPAKKIN

Desde su fundación en 1972, de procesamiento de caucho, como un pionero en la fabricación de goma de embalaje de los esfuerzos para desarrollar tecnología de vanguardia, producto situado en el corazón de la importante función de un mínimo suministro de ultra-fino visita de trabajo de hoy Hizo. Todas las de caucho y otros materiales, el medio ambiente resina sintética, PONJI Su, cinta, el cine y los nuevos materiales, como el desarrollo de productos aprovecha al máximo las características de los materiales por otro lado, una pequeña cantidad de cambio en el suministro de una variedad de forma flexible Trabajo para construir un sistema de producción. En particular, "Su confianza es creado para ser feliz" KAKAGE política de calidad, satisfacción del cliente y ofrecer productos y servicios.

Quimica - Chemical: Resin Casting Tips

Quimica, Chemical: China plastic pipe industry

Quimica - Chemical: Transformación de caucho

Quimica - Chemical: Caucho de silicona en cucharas y tenedores

Quimica - Chemical: Clariant Biocides

Quimica, Chemical: Marware SportGrip iphone

Quimica, Chemical: china plastic injection molding, injectin moulding

Quimica - chemical: The Silicone was created for Berzelius

The Silicone

Inventions that changed the course of humanity.
Jöns Jacob Berzelius
It was the first analyst Siglo XIX: in addition to carrying out as precisely as a huge number of analysis, we must attribute the discovery of several bodies simple: Hisinger and Berzelius discovered the element cerium in 1807, in 1817 identifies with Johan Gottlieb Gahn selenium, and as the third and final discovery thorium in 1829. His students discovered two other elements: in 1817 Johann August Arfvedson discovers lithium, and in 1830 Nils Sefström Gabriel discovers vanadium. Berzelius was who proposed the names of lithium and vanadium, as well as sodium. It was the first chemist who isolated the silicon (in 1823), zirconium (in 1824), thorium (in 1828) and titanium.

He studied combinations of sulfur with phosphorus, fluorine and fluoride, found a large number of chemical equivalents. It was practically the creator of organic chemistry. He introduced the concepts and words alotropía, catalysis, isomería, halogen, organic radical and protein. As philosopher as experimenter, consolidated the atomistic theory as well as the proportions of chemical invented and made universally accepted chemical formulas similar to the algebraic formulas with the aim of expressing the composition of the bodies. To explain the phenomena adopted the famous theory of dualism electro-chemical, and with this theory carried out many reforms in the nomenclature and classification. It was the precursor and developed a theory about the electrochemical and unites radicals. He also was among the first to mineralogy based on knowledge of the chemical elements of the bodies. The current system of chemical notation was adopted thanks to Berzelius, who was the one who proposed it in 1813. Berzelius was among the first who published a table of the atomic and molecular masses with acceptable accuracy.

Born in Väversunda Sörgård near VADSTENA in 1779, the son of a schoolteacher. He began studying medicine in 1796 at the University of Uppsala, while working at the chemistry lab of Johan Afzelius. This made him decide about chemistry. Soon began to experiment. Already in 1800 highlighted by his remarks about mineral waters of Medevi. He completed studies in Chemistry at the same time as those for Medicine, and received his Ph.D. in 1802.

Attempting to balance his work as a physician and assistant professor until 1806, when he became responsible for the courses of Chemistry of the Military Academy Carlsberg. Began publishing in 1806, along with Wilhelm Hisinger, some memories relaticionadas with physics, chemistry, minerologís. Between 1807 and 1831, was Professor of Botany, Medicine and Pharmacy in Stockholm, while still giving classes at the Institute of Chemistry Medical-Surgical Karoline Stockholm, between 1815 and 1832.

Berzelius was Permanent Secretary of the Royal Swedish Academy of Sciences, which was a member since 1808, between 1818 and 1848 and associated with the Royal Society and the Institut de France, and a member of the Swedish Academy between 1837 and 1848. In 1832 left teaching to be able to devote himself entirely to research. In 1835 he married, and is named Freiherr (equivalent to the title of Baron), as a wedding gift by King Charles XIV of Sweden. For his work won the Copley Medal in 1836. He died in Stockholm in 1848.

Quimica - Chemical: Láminas de silicona

Láminas de silicona

La demanda de láminas de silicona sólida sigue creciendo y está disponible en tamaños que van desde 0,5 mm de espesor de 12mm de espesor. Si bien la mayoría de las poblaciones estándar son de un metro de ancho, otros vienen en grados 305mm, 457mm o 610mm plazas disponibles.

Quimica - Chemical: Tubo de silicona

Todos los tipos de tubos de silicona en el estándar de la FDA y materiales, con co-extrusión nylon y poliéster para la dureza estructural.

Ronfell Grupo ofrece una amplia línea de sistemas de tuberías y manguera de productos elaborados a partir de este versátil material, incluidos los productos curados de platino para garantizar la menos posible extraíbles. Nuestro estado de la técnica, la clase 1000 de sala limpia se ha diseñado para la fabricación de productos especialmente adaptados a médicos y farmacéuticos aplicaciones. Además, nuestros industrial grados ofrecer un rendimiento excepcional en los costos relativamente más bajos.

Tubos de silicona ha sido durante mucho tiempo utilizado en los tubos, ya que se ajusta a los médicos de la industria de los requisitos para la limpieza y la no-toxicidad. Otro de silicona de las principales características - la resistencia a variaciones extremas de temperatura - ha permitido su uso en aplicaciones donde un tubo flexible que se necesita para manejar una temperatura que no es posible con otros plásticos o gomas.

Una de goma-como thermoset material, tubos de silicona y la manguera es muy flexible y elástico, y no es alterada por los efectos del clima. En general, las exposiciones inercia hacia UV, radiación, ozono y lo que es una excelente opción para máquinas eléctricas asociadas a las aplicaciones.

Quimica, Chemical: El caucho en España entra en recesión

La producción en España de productos relacionados con caucho entra en recesión. Los transformadores de caucho estan reducciones sus valores de producción entre el 30 y el 50 % para este invierno e incluso tienen previsto cerrar durante 3 semanas para vacaciones de Navidad, debido a la falta de pedidos.

在西班牙生产的产品涉及橡胶进入衰退。橡胶处理器是削减其生产的价值30至50 ％的这个冬季，甚至有计划关闭3周的圣诞假期，由于缺乏订单。

Production in Spain of products related to rubber goes into recession. Rubber processors are cuts its production values between 30 and 50% for this winter and even have plans to close for 3 weeks for Christmas break, due to lack of orders.

Quimica - Chemical: Cable de silicona

Cable de silicona

Una serie de silicona de alta temperatura de cable disponible al alza de 1.5 mm, con temperaturas de 200 ° C a 300 ° C. Para aguantar temperaturas superiores se precisan siliconas con unos aditivos especiales que les ayudan a aguantar hasta unos 350 - 400 ºC

Quimica - Chemical: Compounds de silicona

Personalizar compuestos de caucho de silicona
Nuestro negocio está compuesto de materiales de silicona de alta para cumplir con las especificaciones para las solicitudes individuales, incluida la sección 12 retardador de llama para materiales de London Underground, Metrolink y especificaciones de las aeronaves.

Requisitos para la dureza
Elasticidad
Flexibilidad
Módulo
Resistencia a la tracción
Retardante de llama
Químicos y solventes resistencia
Con soporte las condiciones ambientales
Coincidencia de color personalizado
Propiedades de silicona
Caucho de silicona es un elastómero de elección de nuestros clientes que necesitan productos que están sujetos a condiciones ambientales extremas, o cuando la fiabilidad es fundamental.
Caucho de silicona ofrece las siguientes características:

Flexibilidad
Ajuste de compresión de baja
Resistencia a la tracción
Aislamiento eléctrico
Conductividad Térmica
Inercia en baja y alta temperatura o la exposición al ozono

Quimica - Chemical: Enmascaramiento de caucho EPDM

EPDM tapas y tapones son una alternativa barata de caucho de silicona para enmascarar los productos. Con excelente resistencia química, las partes pueden resistir temperaturas de hasta 140 ° C. Estos productos son especialmente resistentes a ácidos y productos químicos utilizados en los procesos de galvanoplastia, tales como el cromo y otras soluciones de enchapado.

Quimica - Chemical: Silicona sólida

El Caucho de silicona es un elastómero sintético, que, al mismo tiempo tener la resistencia y elasticidad asociados con naturales y de otro tipo de cauchos sintéticos, posee la extraordinaria capacidad de conservar estas propiedades en una amplia gama de temperaturas y las aprobaciones UL 94VO.