US 4,393,172 AGranted

High-notched-impact core-shell polymers having improved weather resistance

AssigneeBayer Aktiengesellschaft

InventorsChristian Lindner, Karl-Heinz Ott, Alfred Pischtschan

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Abstract

A particulate graft polymer comprising (a) a core formed by a crosslinked homopolymer of a conjugated diene or a copolymer thereof with up to 10% by weight of styrene or acrylonitrile; (b) a first shell formed by a crosslinked homopolymer of an acrylic acid alkyl ester or a copolymer thereof with up to 30% by weight of vinyl monomers; (c) a second shell formed by a polymer of resin-forming monomers, a process for manufacturing these graft polymers by means of a multi-stage emulsion polymerization, and their application as molding compositions, optionally together with rigid thermoplastic resins.

Claims6

Dependent claims

Particulate graft polymer comprising

(a) a core which is a crosslinked homopolymer of a conjugated diene or a copolymer thereof with up to 10% by weight of copolymerized styrene or acrylonitrile and having a gel content of more than 50%,
(b) a first shell which is a crosslinked rubber formed by polymerizing a monomer mixture consisting of at least one acrylic acid alkyl ester having 1 to 8 carbon atoms in the alkyl moiety and 0.05 to 10% by weight, based on the weight of (b), of a crosslinking polyfunctional monomer and
(c) a second shell of a polymer of at least one resin-forming monomer selected from the group consisting of .alpha.-methyl styrene, styrene, acrylonitrile and methyl methacrylate.

Dependencies are inferred from the claim text.

Facts

Application: 06/309,569Filed 8 Oct 1981 · continuation in part
Priority: DE 300680423 Feb 1980
Granted: 12 Jul 1983
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

C08F 279/02
Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as…
Y10S 525/902
Synthetic resins or natural rubbers -- part of the class 520 series: core-shell
C08F
Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
Y10S
Technical subjects covered by former uspc cross-reference art collections [xracs] and digests

Family

Serial235,096Parent of this continuation-in-part · filed 17 Feb 1981
US 4,393,172 AThis patent

From the US filing history. Foreign family members aren’t listed.

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