Impact-resistant polyoxymethylene molding materials and their preparation
First Claim
1. An impact-resistant polyoxymethylene molding material containing(A) from 30 to 95% by weight of one or more polyoxymethylenes and(B) from 5 to 70% by weight of one or more elastomeric graft polymers which are prepared by emulsion polymerization, are dispersed in component A, have a mean particle diameter of from 0.08 to 2 μ
- m and are composed of1. from 60 to 90% by weight of a grafting base of crosslinked polybutadiene in which not more than 30% by weight of the butadiene may be replaced by one or more of isoprene, 2,3-dimethylbutadiene, styrene, p-methylstyrene, α
-methylstyrene and (meth)acrylonitrile, and2. from 10 to 40% by weight of one or more grafted shells consisting of polymers of styrene, methyl methacrylate or mixtures thereof which not more than 30% by weight of the said monomers 2 may be replaced with acrylonitrile or a C1 -C8 -alkyl acrylate,the percentages A and B and the percentages 1 and 2 summing to 100,
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Accused Products
Abstract
Impact-resistant polyoxymethylene molding materials containing
(A) from 30 to 95% by weight of one or more polyoxymethylenes and
(B) from 5 to 70% by weight of one or more elastomeric graft polymers which are prepared by emulsion polymerization, are dispersed in component A, have a mean particle diameter of from 0.08 to 2 μm and are composed of
1. from 60 to 90% by weight of a grafting base of crosslinked polybutadiene in which not more than 30% by weight of the butadiene may be replaced with isoprene, 2,3-dimethylbutadiene, styrene, p-methylstyrene, α-methylstyrene and/or (meth)acrylonitrile, and
2. from 10 to 40% by weight of one or more grafted shells consisting of polymers of styrene and/or methyl methacrylate, in which not more than 15% by weight of the said monomers 2 may be replaced with acrylonitrile or a C1 -C8 -alkyl acrylate,
the percentages A and B and the percentages 1 and 2 summing to 100, with or without
(C) effective amounts of assistants,
and a process for their preparation.
25 Citations
7 Claims
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1. An impact-resistant polyoxymethylene molding material containing
(A) from 30 to 95% by weight of one or more polyoxymethylenes and (B) from 5 to 70% by weight of one or more elastomeric graft polymers which are prepared by emulsion polymerization, are dispersed in component A, have a mean particle diameter of from 0.08 to 2 μ - m and are composed of
1. from 60 to 90% by weight of a grafting base of crosslinked polybutadiene in which not more than 30% by weight of the butadiene may be replaced by one or more of isoprene, 2,3-dimethylbutadiene, styrene, p-methylstyrene, α
-methylstyrene and (meth)acrylonitrile, and2. from 10 to 40% by weight of one or more grafted shells consisting of polymers of styrene, methyl methacrylate or mixtures thereof which not more than 30% by weight of the said monomers 2 may be replaced with acrylonitrile or a C1 -C8 -alkyl acrylate, the percentages A and B and the percentages 1 and 2 summing to 100, - View Dependent Claims (2, 3, 4, 5, 6, 7)
- m and are composed of
Specification