Bayer Aktiengesellschaft

Ulrich Steffen

Heinrich Alberts

Richard Prinz

Herbert Bartl

Leo Morbitzer

Fritz Mietzsch

Klaus Riebel

A process for the production of cross-linked graft copolymers by the radically initiated precipitation copolymerization of an ethylene/vinyl ester copolymer as graft base and a mixture to be grafted of one or more aromatic monovinyl compounds, acrylonitrile and/or methacrylonitrile, a cross-linking agent containing two or more carbon-carbon double bonds, and, optionally, another monoolefinically unsatured copolymerizable monomer wherein the ungrafted base is precipitated by the addition of a precipitating agent simultaneously with the precipitating cross-linked graft copolymer.

Process for the production of cross-linked graft copolymers

A process for the preparation of dispersions of optionally cross-linked ethylene-vinyl ester graft polymers wherein an ethylene-vinyl ester copolymer is used as graft substrate and a vinyl ester of a C.sub.1 -C.sub.18 carboxylic acid and/or a C.sub.1 -C.sub.10 -alkyl ester of acrylic and/or methacrylic acid are used as a graft monomer which is polymerized, optionally together with a cross-linking agent having two or more C--C double bonds, in organic solution until at least 25% by weight of the graft monomer has been reacted, the reaction product is converted into a stable finely divided dispersion by the addition of a precipitating agent under the action of shearing forces and polymerisation is completed before, during or after the formation of the dispersion.

Process for the preparation of ethylene-vinyl ester graft polymer

Graft copolymers containing allyl compounds

Graft copolymers containing (meth)acrylic acid or (meth)acrylic acid

A graft copolymer which is suitable for use as coating material and thermoplastically processible resin consisting essentially of (A) from 10 to 80%, by weight, of an ethylene/vinyl ester copolymer having a vinyl ester content of from 1 to 75%, by weight; and, grafted thereon, (B) from 90 to 20%, by weight, of a monomer mixture comprising:

Graft copolymers

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Leverkusen, Germany

Ulrich Steffen