Claims
- 1. A polymeric blend containing:
- from 20 to 80% by weight, with respect to the blend, of a vinyl-aromatic polymer containing about 8% by weight of a butadiene rubber having a glass transition temperature of less than -20.degree. C. and containing from 5 to 15% by weight of an ethylenically unsaturated nitrile; from 80 to 20% by weight, with respect to the blend, of an aromatic polycarbonate having repeating structural units of the formula: ##STR6## in which R.sub.1, R.sub.2, R.sub.3, and R.sub.4 each represents hydrogen or an alkyl radical containing from 1 to 3 carbon atoms, and A represents --O--, --CO--, --SO.sub.2, an alkylene radical containing from 1 to 10 carbon atoms, an alkylidene radical containing from 1 to 10 carbon atoms, a cyclo-alkylene radical containing from 5 to 15 carbon atoms, a cyclo-alkylidene radical containing from 5 to 15 carbon atoms or the radical: ##STR7## and wherein the vinyl-aromatic polymer contains at least 50% by weight of one or more vinyl-aromatic compounds of the formula ##STR8## in which X is hydrogen or C.sub.1 -C.sub.4 alkyl; Y is a halogen or C.sub.1 -C.sub.4 alkyl; and n is zero or an integer from 1 to 5.
- 2. A polymeric blend according to claim 1, in which the ethylenically unsaturated nitrile is acrylonitrile.
- 3. A polymeric blend according to claim 1, in which the content of ethylenically unsaturated nitrile in the modified vinyl-aromatic polymer is less than 10% by weight.
- 4. A polymeric blend according to claim 2, in which the content of acrylonitrile is less than 10% by weight.
- 5. A polymeric blend according to claim 1, in which the polycarbonate is obtained from bisphenol.
- 6. A polymeric blend consisting essentially of from 20 to 80% by weight, with respect to the blend, of a vinyl-aromatic polymer containing about 8% by weight of a butadiene rubber having a glass transition temperature of less than -20.degree. C. and containing from 5 to 15% by weight of an ethylenically unsaturated nitrile, and
- from 80 to 20% by weight, with respect to the blend, of an aromatic polycarbonate having repeating structural units of the formula: ##STR9## in which R.sub.1, R.sub.2, R.sub.3, and R.sub.4 each represents hydrogen or an alkyl radical containing from 1 to 3 carbon atoms, and A repesents --O--, --CO--, --SO.sub.2 --, an alkylene radical containing from 1 to 10 carbon atoms, an alkylidene radical containing from 1 to 10 carbon atoms, a cyclo-alkylene radical containing from 5 to 15 carbon atoms, a cyclo-alkylidene radical containing from 5 to 15 carbon atoms or the radical: ##STR10## and wherein the vinyl-aromatic polymer contains at least 50% by weight of one or more vinyl-aromatic compounds of the formula ##STR11## in which X is hydrogen or C.sub.1 -C.sub.4 alkyl; Y is a halogen or C.sub.1 -C.sub.4 alkyl; and n is zero or an integer from 1 to 5.
- 7. A polymeric blend according to claim 6, in which the ethylenically unsaturated nitrile is acrylonitrile.
- 8. A polymeric blend according to claim 7, in which the content of acrylonitrile is less than 10% by weight.
- 9. A polymeric blend according to claim 6, in which the content of ethylenically unsaturated nitrile in the modified vinyl-aromatic polymer is less than 10% by weight.
- 10. A polymeric blend according to claim 6, in which the aromatic polycarbonate is obtained from bisphenol A.
- 11. A polymeric blend containing from 20% to 80% by weight with respect to the blend of a vinyl aromatic polymer containing from 5 to 15% by weight of an ethylenically unsaturated nitrile selected from the group consisting of acrylonitrile and methacrylonitrile about 8% by weight of a butadiene rubber having a glass transition temperature lower than -20.degree. C., for rendering the polymer impact-resistant, and from 80 to 20% by weight of an aromatic polycarbonate having repeating structural units of the formula ##STR12## in which R.sub.1, R.sub.2, R.sub.3, and R.sub.4 each represents hydrogen or an alkyl radical containing from 1 to 3 carbon atoms, and A represents --O--, --CO--, --SO.sub.2 --, an alkylene radical containing from 1 to 10 carbon atoms, an alkylidene radical containing from 1 to 10 carbon atoms, a cyclo-alkylene radical containing from 5 to 15 carbon atoms, a cyclo-alkylidene radical containing from 5 to 15 carbon atoms or the radical ##STR13## and wherein the vinyl-aromatic polymer contains at least 50% by weight of one or more vinyl-aromatic compounds of the formula ##STR14## in which X is hydrogen or C.sub.1 -C.sub.4 alkyl; Y is a halogen or a C.sub.1 -C.sub.4 alkyl; and n is zero or an integer from 1 to 5.
Parent Case Info
This is a continuation of application Ser. No. 583,399, filed Feb. 24, 1984, now abandoned.
US Referenced Citations (10)
Continuations (1)
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Number |
Date |
Country |
Parent |
583399 |
Feb 1984 |
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