Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
271 words
Polymer blends comprising: I from 60 to 99% by weight of polyamide; II from 1 to 40% by weight of a graft product consisting of:-(a) from 70 to 99% by weight of a graft substrate of at least one member selected from the group consisting of polyethylene and a copolymer of ethylene and a vinyl ester containing up to 50% by weight of the vinyl ester, and (b) from 1 to 30% by weight of grafted units of at least one member se-lected from the group consisting of:-.alpha.) from 0 to l00% by weight of (meth) acrylic acid and .beta.) from 0 to 100% by weight of an ester of (meth) acrylic acid formedfrom an alcohol having from 1 to 8 carbon atoms and ?) from 0 to 30% by weight of acrylamide and ?) from 0 to 30% by weight of maleic acid anhydride, which graft products are prepared by a process of graft polymerization which comprises bringing the solvent free melted polymer used as a graft substrate into contact with oxygen or an oxygen-containing gas at a pressure of from 1 to 150 bar and at a temperature of from 80 to 300°C under conditions of vigorous mixing for a maximum of 10 minutes, adding immediately thereafter the monomers which are to be grafted under conditions of vigorous mixing in the absence of oxygen and oxygen-containing gas, and removing the residual monomers after poly-merization; and III from 0 to 20 % by weight of polyethylene in which blends the sum of I - III and of (a) -(b) and of .alpha.-.delta. must in each case be 100% by weight.
Claim 2
Dependent Claim
271 words
Polymer blends comprising: I from 60 to 99% by weight of polyamide; II from 1 to 40% by weight of a graft product consisting of:-(a) from 70 to 99% by weight of a graft substrate of at least one member selected from the group consisting of polyethylene and a copolymer of ethylene and a vinyl ester containing up to 50% by weight of the vinyl ester, and (b) from 1 to 30% by weight of grafted units of at least one member se-lected from the group consisting of:-.alpha.) from 0 to l00% by weight of (meth) acrylic acid and .beta.) from 0 to 100% by weight of an ester of (meth) acrylic acid formedfrom an alcohol having from 1 to 8 carbon atoms and ?) from 0 to 30% by weight of acrylamide and ?) from 0 to 30% by weight of maleic acid anhydride, which graft products are prepared by a process of graft polymerization which comprises bringing the solvent free melted polymer used as a graft substrate into contact with oxygen or an oxygen-containing gas at a pressure of from 1 to 150 bar and at a temperature of from 80 to 300°C under conditions of vigorous mixing for a maximum of 10 minutes, adding immediately thereafter the monomers which are to be grafted under conditions of vigorous mixing in the absence of oxygen and oxygen-containing gas, and removing the residual monomers after poly-merization; and III from 0 to 20 % by weight of polyethylene in which blends the sum of I - III and of (a) -(b) and of .alpha.-.delta. must in each case be 100% by weight.
Claim 3
Dependent Claim
17 words
A blend as claimed in claim 1 which contains from 70 to 95% by weight of polyamide.
Claim 4
Dependent Claim
19 words
A blend as claimed in claim 1 which contains from 5 to 30% by weight of graft product II.
Claim 5
Dependent Claim
17 words
A blend as claimed in claim 1 which contains from 0 to 10% by weight of polyethylene.
Claim 6
Dependent Claim
33 words
A polyamide moulding composition as claimed in claim 1 wherein component II contains from 75 to 95% by weight of the graft substrate, and from 5 to 25% by weight of grafted units.
Claim 7
Dependent Claim
26 words
A blend as claimed in claim 1 wherein the ester of (meth) acrylic acid is formed from an alcohol having from 2 to 4 carbon atoms.
Claim 8
Dependent Claim
21 words
A blend as claimed in claim 1 wherein the grafted units are derived from acrylic acid, n-butyl acrylate and tert. butylacrylate.
Claim 9
Dependent Claim
17 words
A blend as claimed in claim 1 wherein the polyamide is polyamide-6 , polyamide-6,6 or mixtures thereof.
Claim 10
Dependent Claim
14 words
A blend as claimed in claim 1 wherein the vinyl ester is vinyl acetate.
Claim 11
Dependent Claim
17 words
A moulded article when produced from a blend as claimed in claim 1. Le A 18 576