Claims
- 1. Vinyl-aromatic polymeric blends having high tenacity and chemical resistance, characterized in that they comprise:
- from 10 to 90% by weight of a vinylchloride polymer and from 90 to 10% by weight of a diene rubber modified vinyl-aromatic copolymer containing from about 8% by weight of an ethylenically unsaturated nitrile and about 8% diene rubber by weight.
- 2. Blends according to claim 1, characterized in that they comprise from 25 to 75% by weight of a vinylchloride polymer and from 75 to 25% by weight of a diene rubber modified vinyl-aromatic copolymer containing from about 8% by weight of an ethylenically unsaturated nitrile and about 8% diene rubber by weight.
- 3. Blends according to claim 1, characterized in that the vinyl-aromatic copolymer contains at least 50% by weight of at least one vinyl-aromatic monomer of the general formula: ##STR2## wherein X is selected from the group consisting of hydrogen and alkyl radicals having from 1 to 4 carbon atoms; Y is selected from the group consisting of halogen and alkyl radicals having from 1 to 4 carbon atoms, and n is an integer comprised between 0 and 5.
- 4. Blends according to claim 1, characterized in that the copolymerized ethylenically unsaturated nitrile is acrylonitrile.
- 5. Blends according to claim 1, characterized in that the copolymerized ethylenically unsaturated nitrile is methacrylonitrile.
- 6. Blends according to claim 1, characterized in that the vinylchloride polymers are selected from the group consisitng of vinylchloride homopolymer and copolymers thereof containing up to 20% by weight of other copolymerizable unsaturated compounds.
- 7. Blends according to claim 1, further characterized in that they contain from 0.1 to 10% by weight of an additive selected from the group consisting of stabilizers, plasticizers, lubricants, anti-flame agents, anti-static agents, flowing agents, dyestuffs, pigments, and foaming agents.
- 8. A blend according to claim 7, in which the additive is a stabilizer in the amount of 1 to 5% by weight.
Priority Claims (1)
Number |
Date |
Country |
Kind |
20779 A/85 |
May 1985 |
ITX |
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Parent Case Info
This application is a continuation of application Ser. No. 863,786, filed May 16, 1986, now abandoned.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
2802809 |
Hayes |
Aug 1957 |
|
3053800 |
Grabowski et al. |
Sep 1962 |
|
3689598 |
Bierwirth et al. |
Sep 1972 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
739758 |
Mar 1970 |
BEX |
Continuations (1)
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Number |
Date |
Country |
Parent |
863786 |
May 1986 |
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