Claims
- 1. Thermoplastic moulding compositions comprising
- (A) from 1 to 80 parts, by weight, of polybutylene terephthalate,
- (B) from 20 to 99 parts, by weight, of bisphenol-A polycarbonate having an average molecular weight of from 10,000 to 200,000 as determined by measurement of the relative viscosity in dichloromethane at 25.degree. C. using a concentration of 0.5%, by weight; polycarbonate (B) containing from 2 to 20%, by weight, based on (B), of o,o,o',o'-tetramethyl bisphenol-A polycarbonate and
- (C) from 1 to 20 parts, by weight, of a polymer having a glass transition temperature below -20.degree. C. selected from the group consisting of
- (i) graft polymers obtained by grafting
- (I) from 10 to 40%, by weight, based on the graft product, of monomers selected from the group consisting of (a) at least one (meth)acrylic acid ester, (b) a mixture of from 10 to 35%, by weight, based on the mixture, of acrylonitrile and from 65 to 90%, by weight, based on the mixture, of styrene, and mixtures of (a) and (b) on
- (II) from 60 to 90%, by weight, based on the graft product, of a butadiene polymer containing at least 70%, by weight, based on (II), of butadiene residues as the graft base, the gel content of the graft base (II) amounting to .gtoreq.70% (as measured in toluene), the degree of grafting, G, to from 0.15 to 0.55 and the average particle diameter, d.sub.50, of the graft polymer (C) to from 0.2 to 0.6 .mu.m, and
- (ii) graft polymers of
- (a) from 25 to 98%, by weight, based on (C), of an acrylate rubber having a glass transition temperature below -20.degree. C. as the graft base; and
- (b) from 2 to 75%, by weight, based on (C), of at least one polymerisable ethylenically unsaturated monomer, of which the homo- or co-polymer(s) formed in the absence of (a) would have a glass transition temperature above 25.degree. C., as the graft monomer, the quantities of components (A), (B), and (C) totalling 100 parts, by weight.
- 2. Molding compositions as claimed in claim 1, wherein (C) is a graft polymer obtained by grafting
- (I) from 10 to 40% by weight, based on the graft product, of monomers selected from the group consisting of (a) at least one (meth)acrylic acid ester, (b) a mixture of from 10 to 35%, by weight, based on the mixture, of acrylonitrile and from 65 to 90%, by weight, based on the mixture, of styrene, and mixtures of (a) and (b) on
- (II) from 60 to 90%, by weight, based on the graft product, of a butadiene polymer containing at least 70%, by weight, based on (II), of butadiene residues as the graft base, the gel content of the graft base (II) amounting to .gtoreq.70% (as measured in toluene), the degree of grafting, G, to from 0.15 to 0.55 and the average particle diameter, d.sub.50' of the graft polymer (C) to from 0.2 to 0.6 .mu.m.
- 3. Molding compositions as claimed in claim 1, wherein (C) is a graft polymer of
- (a) from 25 to 98%, by weight, based on (C), of an acrylate rubber having a glass transition temperature below -20.degree. C. as the graft base; and
- (b) from 2 to 75%, by weight, based on (C), of at least one polymerisable ethylenically unsaturated monomer, of which the homo- or co-polymer(s) formed in the absence of (a) would have a glass transition temperature above 25.degree. C., as the graft monomer, the quantities of components (A), (B), and (C) totalling 100 parts, by weight.
- 4. Moulding compositions as claimed in claim 1, characterised in that they contain:
- from 20 to 80 parts, by weight, of (A);
- from 20 to 80 parts, by weight, of (B); and
- from 1 to 20 parts, by weight, of (C);
- the quantities of components (A), (B) and (C) totalling 100 parts, by weight.
- 5. Moulding compositions as claimed in claim 1, characterised in that they are glass fibre-reinforced.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3118697 |
May 1981 |
DEX |
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Parent Case Info
This application is a continuation of Ser. No. 518,071, filed July 28, 1983, now abandoned, which was a continuation of Ser. No. 375,390, filed May 6, 1982, now abandoned.
US Referenced Citations (13)
Foreign Referenced Citations (1)
Number |
Date |
Country |
1508562 |
Apr 1978 |
GBX |
Continuations (2)
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Number |
Date |
Country |
Parent |
518071 |
Jul 1983 |
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Parent |
375390 |
May 1982 |
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