Claims
- 1. A polyblend composition comprising:
- A. a polymer of a monovinylidene aromatic monomer and an ethylenically unsaturated nitrile monomer wherein the weight ratio of monovinylidene aromatic monomer to nitrile monomer is in the range of 80/20 to 20/80;
- B. from 16.5 to 80% by weight based on the total weight of the polyblend, of a grafted, crosslinked polychloroprene rubber having a Mooney viscosity of at least 200 (MS 2-1/2 min. 212.degree. F.), said rubber being grafted with:
- 1. at least one monovinylidene aromatic monomer, and
- 2. an ethylenically unsaturated nitrile monomer; wherein the weight ratio of monovinylidene aromatic monomer to nitrile monomer in the grafted rubber is in the range of 80/20 to 20/80;
- wherein the amount of polychloroprene rubber in the polyblend, calculated as ungrafted rubber, is in the range of from 15 to 40% by weight, based on the total weight of the polyblend and wherein the particle size of the polychloroprene rubber prior to grafting is in the range of from 0.05 to 0.20 micron;
- C. from 0.5 to 5% by weight, based on the total weight of the polyblend, of a butadiene rubber having a particle size in the range of from 0.07 to 4.0 microns, said butadiene rubber having been grafted with:
- 1. at least one monovinylidene aromatic monomer, and
- 2. an ethylenically unsaturated nitrile monomer; wherein the weight ratio of monovinylidene aromatic monomer to nitrile monomer in the grafted rubber is in the range of 80/20 to 20/80; and
- D. from 6 to 12% by weight, based on the total weight of the polyblend of Sb.sub.2 O.sub.3.
- 2. A polyblend composition as in claim 1 wherein the nitrile monomer is selected from the group consisting of acrylonitrile, methacrylonitrile and mixtures thereof.
- 3. A polyblend composition of claim 1 wherein the aromatic monomer is selected from the group consisting of styrene, alpha-methyl styrene, chlorostyrene, bromostyrene and mixtures thereof.
- 4. A polyblend composition as in claim 1 wherein the amount of grafted butadiene rubber is in the range of from 1 to 3% by weight.
- 5. An article of manufacture comprising an object formed from a polyblend composition comprising:
- A. a polymer of a monovinylidene aromatic monomer and an ethylenically unsaturated nitrile monomer wherein the weight ratio of monovinylidene aromatic monomer to nitrile monomer is in the range of 80/20 to 20/80;
- B. from 16.5 to 80% by weight based on the total weight of the polyblend, of a grafted, crosslinked polychloroprene rubber having a Mooney viscosity of at least 200 (MS 2-1/2 min. 212.degree. F.), said rubber being grafted with:
- 1. at least one monovinylidene aromatic monomer, and
- 2. an ethylenically unsaturated nitrile monomer; wherein the weight ratio of monovinylidene aromatic monomer to nitrile monomer in the grafted rubber is in the range of 80/20 to 20/80;
- wherein the amount of polychloroprene rubber in the polyblend, calculated as ungrafted rubber, is in the range of from 15 to 40% by weight, based on the total weight of the polyblend and wherein the particle size of the polychloroprene rubber prior to grafting is in the range of from 0.05 to 0.20 micron;
- C. from 0.5 to 5% by weight, based on the total weight of the polyblend, of a butadiene rubber having a particle size in the range of from 0.7 to 4.0 microns, said butadiene rubber having been grafted with:
- 1. at least one monovinylidene aromatic monomer, and
- 2. an ethylenically unsaturated nitrile monomer; wherein the weight ratio of monovinylidene aromatic monomer to nitrile monomer in the grafted rubber is in the range of 80/20 to 20/80; and
- D. from 6 to 12% by weight, based on the total weight of the polyblend of Sb.sub.2 O.sub.3.
- 6. An article as in claim 5 wherein the nitrile monomer is selected from the group consisting of acrylonitrile, methacrylonitrile and mixtures thereof.
- 7. An article as in claim 5 wherein the aromatic monomer is selected from the group consisting of styrene, alphamethyl styrene, chlorostyrene, bromostyrene and mixtures thereof.
- 8. An article as in claim 5 wherein the amount of grafted butadiene rubber is in the range of from 1 to 3% by weight.
Parent Case Info
This application is a continuation-in-part of copending application Ser. No. 291,949, filed Sept. 25, 1972, which, in turn, is a continuation-in-part of Ser. No. 220,428, filed Jan. 24, 1972 and now abandoned.
US Referenced Citations (5)
Continuation in Parts (2)
|
Number |
Date |
Country |
Parent |
291949 |
Sep 1972 |
|
Parent |
220428 |
Jan 1972 |
|