Thermoplastic polyester moulding compositions which have good impact strength
First Claim
1. Thermoplastic moulding compositions comprising(A) from 65 to 97% by weight (based on A+B) of thermoplastic polyester and(B) from 3 to 35% by weight (based on A+B) of the graft productof at least one vinyl monomer selected from styrene, acrylonitrile and methyl methacrylate on particle-shaped, at least partially cross-linked diene rubbers and/or alkyl acrylate rubbers having an average rubber particle diameter of from 0.05 to 1 μ
- m, the graft products having a rubber content of from 60 to 85%, by weight, characterised in that the graft products B are produced on the basis of a mixture ofa. from 20 to 80% by weight (based on a+b) of a rubber latex having a particle diameter d50 of from 0.05 to 0.19 μ
m, andb. from 80 to 20% by weight (based on a+b) of a rubber latex having a particle diameter d50 of from 0.2 to 1.0 μ
mwith the limitation that(1) d50 (b) is larger than d50 (a) by a factor of from 1.5 to 8,(2) the quotient Q=(d90 -d10)/d50 of the particular rubbers is at most 2, and(3) the difference d10 (b)-d90 (a) is from 0.01 to -0.10.
1 Assignment
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Accused Products
Abstract
The present invention relates to thermoplastic moulding compositions, which have improved impact strength at low temperature, comprising thermoplastic polyesters, in particular polyalkylene terephthalates, and grafted, partially or highly cross-linked diene rubbers and/or acrylate rubbers having a bimodal rubber particle size distribution.
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Citations
9 Claims
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1. Thermoplastic moulding compositions comprising
(A) from 65 to 97% by weight (based on A+B) of thermoplastic polyester and (B) from 3 to 35% by weight (based on A+B) of the graft product of at least one vinyl monomer selected from styrene, acrylonitrile and methyl methacrylate on particle-shaped, at least partially cross-linked diene rubbers and/or alkyl acrylate rubbers having an average rubber particle diameter of from 0.05 to 1 μ - m, the graft products having a rubber content of from 60 to 85%, by weight, characterised in that the graft products B are produced on the basis of a mixture of
a. from 20 to 80% by weight (based on a+b) of a rubber latex having a particle diameter d50 of from 0.05 to 0.19 μ
m, andb. from 80 to 20% by weight (based on a+b) of a rubber latex having a particle diameter d50 of from 0.2 to 1.0 μ
mwith the limitation that (1) d50 (b) is larger than d50 (a) by a factor of from 1.5 to 8, (2) the quotient Q=(d90 -d10)/d50 of the particular rubbers is at most 2, and (3) the difference d10 (b)-d90 (a) is from 0.01 to -0.10. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- m, the graft products having a rubber content of from 60 to 85%, by weight, characterised in that the graft products B are produced on the basis of a mixture of
Specification