3m Innovative Properties Company

Dyneon Gmbh

Guy Van Gool

Werner M A Grootaert

Klaus Hintzer

Alain G Verschuere

Harald Kaspar

Allan T Worm

Franz M&auml;rz

Tatsuo Fukushi

Gernot L&ouml;hr

Erik D Hare

Bernhard Hirsch

Franz März

Provided is a method of manufacturing a perhalogenated elastomer comprising using an onium compound to coagulate a latex comprising polymer particles, the polymer particles consisting essentially of interpolymerized units of one or more perhalogenated comonomer(s) and at least one cure site monomer, wherein the coagulation is performed essentially free of metal ions and metal salts. Also provided is an elastomeric composition comprising a curable perhalogenated elastomer comprising interpolymerized units derived from a nitrogen-containing cure site monomer and coagulated with an onium compound, wherein the elastomer is capable of curing without adding further components and wherein the composition is essentially free of metal ions and metal salts. Also provided are fluoropolymer articles and methods of making fluoropolymer compositions and articles.

Fluoropolymer coagulation method and composition

The present invention is based on quad-fluoropolymer suitable for the preparation of a fluoroelastomer. The fluoropolymer comprises repeating units derived from 10 to 40 mol % of tetrafluoroethylene, 40 to 65 mol % of vinylidene fluoride, 1 to 30 mol % of a perfluorinated vinyl ether of the formula CF&#x2550;CFOCFCFCFOCF, 1 to 20 mol % of perfluoromethyl vinylether.

Fluoroelastomers having low temperature characteristics and solvent resistance

A fluoropolymer having a reduced amount of polar end groups. The fluoropolymer is produced by free radical polymerization of fluorinated monomers and the initiation of the polymerization is carried out in the presence of a chloride salt. Polar end groups include hydroxy groups and ionized or ionizable end groups. Examples of ionized or ionizable end groups include acid groups and salts thereof such as sulfonic acid and salts thereof, &mdash;CH &mdash;OSO H groups, sulfates and carbonyl containing end groups such as carboxylic and carboxylate groups. Due to the presence of chloride salt at the initiation of the free radical polymerization, CF Cl end groups are formed instead of the polar end groups. As a result, a fluoropolymer is obtained that has improved processibility and heat resistance.

Process for producing fluoropolymers having a reduced amount of polar end groups

Perfluoroelastomers having a low glass transition temperature and method of making them

A composite article comprising a fluoropolymer directly bonded to a silicone-containing polymer is provided. The fluoropolymer is capable of providing a reactive site either through dehydrofluorination or by incorporating a reactive monomer in the fluoropolymer.

Multilayer composites

Growing community of inventors

Melsele, Belgium

Guy Van Gool