Thermoplastic moulding compositions of cellulose ester graft copolymers or mixtures thereof with cellulose esters
AssigneeBayer Aktiengesellschaft
InventorsHeinrich Alberts, Winfried Fischer, Christian Leuschke, Herbert Bartl
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Abstract
Transparent thermoplastic moulding compositions having improved mechanical properties consist of graft copolymers or mixtures thereof with a cellulose ester of aliphatic C.sub.1 -C.sub.5 carboxylic acids, wherein the graft copolymers consist of an ethylene vinyl ester copolymer and a cellulose ester of aliphatic C.sub.1 -C.sub.5 -carboxylic acids as the graft substrate, at least part of which being bridged with polymerized grafted units of vinyl esters and/or alkyl esters of acrylic and/or methacrylic acid, and, optionally, C.sub.2 -C.sub.4 -olefins.
Claims7
Thermoplastic moulding compositions consisting essentially of:
- (1) from 1 to 99%, by weight, of a graft base consisting of:
- (a) from 1 to 99%, by weight, of an ethylene/vinyl ester copolymer containing from 5 to 75%, by weight, of incorporated vinyl ester;
- and
- (b) from 99 to 1%, by weight, of a cellulose ester of one or more aliphatic C.sub.1 -C.sub.5 carboxylic acids;
- and graft polymerized units of:
- (2) from 99 to 1%, by weight, of one or more vinyl esters and/or alkyl esters of acrylic and/or methacrylic acid;
- and
- (3) from 0 to 20%, by weight, of one or more C.sub.2 -C.sub.4 .alpha.-olefins;
- at least part of the ethylene/vinyl ester copolymer and the cellulose ester being bridged with one another through polymerized units of the graft monomers and the sums of components (1) to (3) and (a) and (b) amounting each to 100%, by weight.
Thermoplastic moulding compositions consisting essentially of:
- (I) from 1 to 99%, by weight, of a cellulose ester of one or more aliphatic C.sub.1 -C.sub.5 carboxylic acids;
- and
- (II) from 99 to 1%, by weight, of a graft copolymer consisting of:
- (1) from 1 to 99%, by weight, of a graft base consisting of:
- (a) from 1 to 99%, by weight, of an ethylene/vinyl ester polymer containing from 5 to 75%, by weight, of incorporated vinyl ester;
- and
- (b) from 99 to 1%, by weight, of a cellulose ester of one or more aliphatic C.sub.1 -C.sub.5 carboxylic acids;
- and polymerized units of:
- (2) from 99 to 1%, by weight, of one or more vinyl esters and/or alkyl esters of acrylic and/or methacrylic acid;
- and
- (3) from 0 to 20%, by weight, of one or more C.sub.2 -C.sub.4 .alpha.-olefins;
- at least part of the ethylene/vinyl ester copolymer and the cellulose ester in component (II) being bridged to one another through polymerized units of the graft monomers and the sums of components (I) and (II), (1) to (3) and (a) and (b) amounting each to 100% by weight.
Dependencies are inferred from the claim text.