Patent US4080404A successfully refreshed from Google Patents.
US4080404A
Expired / Lapsed
US
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Flame retardant styrenic molding compositions
Assignee: Bayer Antwerpen NV
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Filing: 1976-04-12
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Granted: 1978-03-21
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Expires: 1996-04-12
Abstract
Abstract Disclosed herein are polyblend molding compositions which comprise (A) poly(styrene/acrylonitrile/methylmethacrylate) matrix polymer; (B) polychloroprene rubber which is grafted with monomers of the type used to prepare the matrix; (C) a metal oxide; and (D) smoke suppressants. Specimens molded from these polyblends have a UL-94 rating of at least V-1 and a smoke level of less than 360 Dm Flaming as measured using the NBS smoke test.
Inventors
- 👤 Gary L. Deets
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:39
CPC Classifications
C; C08; C08K; C08K13/00; C08K13/02; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/24; C08K3/26; C08K3/38; C08K5/00; C08K5/04; C08K5/09; C08L; C08L33/00; C08L33/04; C08L33/06; C08L33/10; C08L33/12; C08L51/00; C08L51/04; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
308 words
A polyblend composition comprising: (A) from 10 to 75 percent by weight based on the total weight of the polyblend of a matrix polymer which comprises the interpolymerization product of: (1) from 20 to 40 percent by weight of a monomer selected from the group consisting of styrene and alpha methyl-styrene; (2) from 20 to 40 percent by weight of a nitrile type monomer; and (3) from 40 t0 60 percent by weight of methylmethacrylate; wherein the weight percents of (1), (2) and (3) are based on the total weight of the matrix polymer with the proviso that the total weight of the styrene and nitrile type monomers is equal to or less than 60 percent by weight and the amount of methylmethacrylate monomer is at least 40 percent by weight; (B) from 20 to 40 percent by weight based on the total weight of the polyblend of a polychloroprene rubber component which is grafted with from 10 to 100 parts of monomers per hundred parts of rubber; wherein the monomers are of the type used to prepare the matrix polymer; (C) from 3 to 15 percent by weight based on the total weight of the polyblend of a metal oxide; (D) from 2 to 25 percent by weight based on the total weight of the polyblend of a smoke suppressant selected from the group consisting of dawsonite, [Na Al CO 3 (OH) 2 ], magnesium carbonate, ferric oxalate, zinc borate, zinc acetate and combinations of zinc oxide and magnesium oxide, wherein the ratio of zinc oxide to magnesium oxide is in the range of from 30/70 to 70/30; (E) from 0 to 10 percent by weight based on the total weight of the polyblend of a halogen fire retardant additive; provided that the total amount of halogen in the polyblend is at least 9 percent by weight.
Claim 2
Dependent Claim
308 words
A polyblend composition comprising: (A) from 10 to 75 percent by weight based on the total weight of the polyblend of a matrix polymer which comprises the interpolymerization product of: (1) from 20 to 40 percent by weight of a monomer selected from the group consisting of styrene and alpha methyl-styrene; (2) from 20 to 40 percent by weight of a nitrile type monomer; and (3) from 40 t0 60 percent by weight of methylmethacrylate; wherein the weight percents of (1), (2) and (3) are based on the total weight of the matrix polymer with the proviso that the total weight of the styrene and nitrile type monomers is equal to or less than 60 percent by weight and the amount of methylmethacrylate monomer is at least 40 percent by weight; (B) from 20 to 40 percent by weight based on the total weight of the polyblend of a polychloroprene rubber component which is grafted with from 10 to 100 parts of monomers per hundred parts of rubber; wherein the monomers are of the type used to prepare the matrix polymer; (C) from 3 to 15 percent by weight based on the total weight of the polyblend of a metal oxide; (D) from 2 to 25 percent by weight based on the total weight of the polyblend of a smoke suppressant selected from the group consisting of dawsonite, [Na Al CO 3 (OH) 2 ], magnesium carbonate, ferric oxalate, zinc borate, zinc acetate and combinations of zinc oxide and magnesium oxide, wherein the ratio of zinc oxide to magnesium oxide is in the range of from 30/70 to 70/30; (E) from 0 to 10 percent by weight based on the total weight of the polyblend of a halogen fire retardant additive; provided that the total amount of halogen in the polyblend is at least 9 percent by weight.
Claim 3
Dependent Claim
18 words
A polyblend as in claim 1 which contains 60 to 75 percent by weight of the matrix polymer.
Claim 4
Dependent Claim
20 words
A polyblend as in claim 1 which contains from 25 to 40 percent by weight of a polychloroprene rubber component.
Claim 5
Dependent Claim
37 words
A polyblend as in claim 1 where the smoke suppressant is a combination of zinc oxide and magnesium oxide, wherein the ratio of zinc oxide to magnesium oxide is in the range of from 30/70 to 70/30.
Claim 6
Dependent Claim
18 words
A polyblend as in claim 1 which contains from 2 to 5 percent by weight of decabromodiphenyl ether.
Claim 7
Dependent Claim
294 words
A polyblend composition comprising: (A) from 60 to 75 percent by weight based on the total weight of the polyblend of a matrix polymer which comprises the interpolymerization product of; (1) from 25 to 40 percent by weight of a monomer selected from the group consisting of styrene and alpha methyl-styrene; (2) from 20 to 40 percent by weight of a nitrile type monomer; and (3) from 40 to 55 percent by weight of methylmethacrylate; wherein the weight percents of (1), (2) and (3) are based on the total weight of the matrix polymer with the proviso that the total weight of the styrene and nitrile type monomers is equal to or less than 60 percent by weight and the amount of methylmethacrylate monomer is at least 40 percent by weight; (B) from 25 to 40 percent by weight based on the total weight of the polyblend of a polychloroprene rubber component which is grafted with from 10 to 100 parts of monomers per hundred parts of rubber; wherein the monomers are of the type used to prepare the matrix polymer; (C) from 6 to 12 percent by weight based on the total weight of the polyblend of a metal oxide; (D) from 2 to 25 percent by weight based on the total weight of the polyblend of a smoke suppressant selected from the group consisting of zinc acetate and combinations of zinc oxide and magnesium oxide, wherein the ratio of zinc oxide to magnesium oxide is in the range of from 30/70 to 70/30; (E) from 0 to 10 percent by weight based on the total weight of the polyblend of a halogen fire retardant additive; provided that the total amount of halogen in the polyblend is at least 9 percent by weight.
Claim 8
Dependent Claim
294 words
A polyblend composition comprising: (A) from 60 to 75 percent by weight based on the total weight of the polyblend of a matrix polymer which comprises the interpolymerization product of; (1) from 25 to 40 percent by weight of a monomer selected from the group consisting of styrene and alpha methyl-styrene; (2) from 20 to 40 percent by weight of a nitrile type monomer; and (3) from 40 to 55 percent by weight of methylmethacrylate; wherein the weight percents of (1), (2) and (3) are based on the total weight of the matrix polymer with the proviso that the total weight of the styrene and nitrile type monomers is equal to or less than 60 percent by weight and the amount of methylmethacrylate monomer is at least 40 percent by weight; (B) from 25 to 40 percent by weight based on the total weight of the polyblend of a polychloroprene rubber component which is grafted with from 10 to 100 parts of monomers per hundred parts of rubber; wherein the monomers are of the type used to prepare the matrix polymer; (C) from 6 to 12 percent by weight based on the total weight of the polyblend of a metal oxide; (D) from 2 to 25 percent by weight based on the total weight of the polyblend of a smoke suppressant selected from the group consisting of zinc acetate and combinations of zinc oxide and magnesium oxide, wherein the ratio of zinc oxide to magnesium oxide is in the range of from 30/70 to 70/30; (E) from 0 to 10 percent by weight based on the total weight of the polyblend of a halogen fire retardant additive; provided that the total amount of halogen in the polyblend is at least 9 percent by weight.
Claim 9
Dependent Claim
37 words
A polyblend as in claim 6 where the smoke suppressant is a combination of zinc oxide and magnesium oxide, wherein the ratio of zinc oxide to magnesium oxide is in the range of from 30/70 to 70/30.
Claim 10
Dependent Claim
18 words
A polyblend as in claim 6 which contains from 2 to 5 percent by weight of decabromodiphenyl ether.
Claim 11
Dependent Claim
9 words
Articles molded from the polyblend composition of claim 1.
Claim 12
Dependent Claim
9 words
Articles molded from the polyblend composition of claim 6.
References Cited (Backward Citations)
US3830889A
Cited
US3903037A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-20 | 1981-09-19 | 1982-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-20 | 1985-09-19 | 1986-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-20 | 1989-09-19 | 1990-03-21 | $7700.00 | Window Closed / Lapsed |