Bayer Aktiengesellschaft

Agfa-gevaert

David Bryan Harrison

Ralf Kruger

Wolfgang Podszun

Leo Morbitzer

Dieter Wrobel

Frank Louwet

Olaf Halle

Werner Str&uuml;ver

Wilhelm-Franz Biener

The invention relates to a rapidly cross-linking liquid fluoropolymer that contains as the essential components tetrafluoroethylene and at least one compound from the group consisting of diiodomethane, 1,2-diiodo-1,1-difluoroethane, 1-iodo-2-bromo-1,1-difluoroethane, 1-bromo-2-iodo-1,1-difluoroethane and/or 1,2-dibromo-1,1-difluoroethane that has certain fractions of the final group of the formula &mdash;CH &mdash;X with X&equals;Br and/or iodine, and iodine/bromine contents in the range of from 0.05 to 1 wt.-%. and that has a defined molecular weight and viscosity. The invention further relates to a method for producing said fluoropolymer and to its use.

Rapidly crosslinking fluoropolymer

Producing spherical polymers having a weight-averaged average particle diameter of 1 to 50 &mgr;m using a seed/feed process comprising the following steps: a) suspension of a monodisperse spherical seed in an aqueous phase, b) addition of at least one monomer and an initiator, c) polymerization of the monomer, of which there is at least one, wherein the seed consists of a polymer having a comb structure, gives rise to products having a particularly narrow grain size distribution.

Production of monodisperse spherical polymers using seed polymers with a comb structure

Process for the preparation of microencapsulated polymers

This invention relates to spherical methyl methacrylate copolymers with an average particle size of 6 to 50 .mu.m and a narrow particle size distribution, and to a method of producing them. The invention further relates to the use of these spherical copolymers for the production of 3-D models by laser sintering.

Copolymers for rapid prototyping

A reactive and processable fluoropolymer, obtainable by mechanical shearing of

Preparation and use of reactive and processable fluoropolymers

Peroxide curable fluororubbers, which contain no cure-site units in addition to the fluoromonomers forming the polymer chain, and a process for their production.

Peroxide curable fluororubbers containing no cure-site monomers

Thermoplastic fluoroelastomer graft polymers formed from a fluorine-containing graft polymer formed from a rubber like (Tg&lt;0.degree. C.), uncrosslinked fluorine-containing copolymer containing double bonds as the graft base onto which is grafted a fluorine-containing monomer that gives an at least partly crystalline polymer are produced from the rubber-like uncrosslinked copolymer by radical polymerization in solution, suspension or emulsion under elevated pressure at about -15.degree. to +120.degree. C., and grafting thereon a monomer which forms an at least partly crystalline polymer the grafting onto the rubber-like copolymer taking place by radical solution, suspension or emulsion graft polymerization under elevated pressure at about -15.degree. to +120.degree. C.

Growing community of inventors

Leverkusen, Germany

David Bryan Harrison