Patent US4460988A successfully refreshed from Google Patents.
US4151218A
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Fire retardant polymers of styrene and maleic anhydride
Assignee: Bayer Antwerpen NV
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Filing: 1975-12-29
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Granted: 1979-04-24
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Expires: 1995-12-29
Abstract
Abstract Disclosed herein are fire retardant polymers of styrene and maleic anhydride. These polymers when formulated with various additives, have a UL-94 rating of at least V-1. The polymers are especially useful for use in radio and T.V. cabinets, furniture, appliance housings and other similar applications.
Inventors
- 👤 Yoon C. Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:43
CPC Classifications
C; C08; C08K; C08K13/00; C08K13/02; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/02; C08K5/03; C08K5/04; C08K5/06; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L35/00; C08L35/06; C08L15/00; C08L15/02; C08L23/26; C08L23/28; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L31/00; C08L31/02; C08L31/04; C08L63/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
245 words
A composition of matter having a UL-94 rating of at least V-1 and a Dm (flaming) of less than 450 which comprises: A. a rubber modified copolymer of a styrene monomer and maleic anhydride containing from 7 to 25 percent by weight, based on the weight of the copolymer of maleic anhydride; wherein the rubber is selected from the group consisting of polyepichlorohydrin rubbers, polychloroprene rubbers, chlorinated polyethylene rubbers and ethylene vinyl acetate rubbers; wherein the amount of rubber used is in the range of from 1 to 30 percent by weight based on the weight of the styrene-maleic anhydride copolymers; with the proviso that when using an ethylene vinyl acetate rubber the maleic anhydride content of the polymer is at least 10 percent by weight; B. from 7.5 to 15 percent by weight, based on the total weight of the composition, of an aromatic bromine compound which will provide at least 6 percent by weight of bromine to the composition; C. from 3 to 12 percent by weight, based on the total weight of the composition, of a metal oxide selected from the group consisting of Sb 2 O 3 , Bi 2 O 3 , MoO 3 , SnO 2 and WO 3 ; and D. from 3 to 25 percent by weight, based on the total weight of the composition, of a smoke suppressant selected from the group consisting of dawsonite, magnesium carbonate, alumina trihydrate, calcium carbonate, magnesium borate and mixtures thereof.
Claim 2
Dependent Claim
245 words
A composition of matter having a UL-94 rating of at least V-1 and a Dm (flaming) of less than 450 which comprises: A. a rubber modified copolymer of a styrene monomer and maleic anhydride containing from 7 to 25 percent by weight, based on the weight of the copolymer of maleic anhydride; wherein the rubber is selected from the group consisting of polyepichlorohydrin rubbers, polychloroprene rubbers, chlorinated polyethylene rubbers and ethylene vinyl acetate rubbers; wherein the amount of rubber used is in the range of from 1 to 30 percent by weight based on the weight of the styrene-maleic anhydride copolymers; with the proviso that when using an ethylene vinyl acetate rubber the maleic anhydride content of the polymer is at least 10 percent by weight; B. from 7.5 to 15 percent by weight, based on the total weight of the composition, of an aromatic bromine compound which will provide at least 6 percent by weight of bromine to the composition; C. from 3 to 12 percent by weight, based on the total weight of the composition, of a metal oxide selected from the group consisting of Sb 2 O 3 , Bi 2 O 3 , MoO 3 , SnO 2 and WO 3 ; and D. from 3 to 25 percent by weight, based on the total weight of the composition, of a smoke suppressant selected from the group consisting of dawsonite, magnesium carbonate, alumina trihydrate, calcium carbonate, magnesium borate and mixtures thereof.
Claim 3
Dependent Claim
24 words
A composition as in claim 1 wherein the styrene monomer is selected from the group consisting of styrene, chlorostyrene, alpha-methyl styrene and mixtures thereof.
Claim 4
Dependent Claim
14 words
A composition as in claim 1 wherein the aromatic bromine compound is decabromodiphenyl oxide.
Claim 5
Dependent Claim
13 words
A composition as in claim 1 wherein the metal oxide is antimony oxide.
Claim 6
Dependent Claim
29 words
A composition as in claim 1 wherein the smoke suppressant is a mixture of magnesium carbonate and wherein the ratio of magnesium carbonate to dawsonite is at least 1:1.
Claim 7
Dependent Claim
22 words
A composition as in claim 1 wherein the rubber component is selected from the group consisting of polyepichlorohydrin, polychloroprene and chlorinated polyethylene.
Claim 8
Dependent Claim
18 words
A composition as in claim 6 which contains from 5 to 20 percent by weight of polyepichlorohydrin rubber.
Claim 9
Dependent Claim
195 words
A composition of matter having a UL-94 rating of at least V-1 and a Dm (flaming) of less than 400 which comprises: A. a copolymer of a styrene monomer and maleic anhydride containing from 10 to 21 percent by weight, based on the weight of the copolymer of maleic anhydride, which is modified with from 5 to 20 percent by weight based on the weight of the styrene-maleic anhydride copolymer of a polyepichlorohydrin rubber; B. from 7.5 to 15 percent by weight, based on the total weight of the composition of an aromatic bromine compound which will provide at least 6 percent by weight of bromine to the composition; C. from 3 to 12 percent by weight, based on the total weight of the composition, of a metal oxide selected from the group consisting of Sb 2 O 3 , Bi 2 O 3 , MoO 3 , SnO 2 and WO 3 ; D. from 5 to 20 percent by weight, based on the total weight of the composition of a smoke suppressant which is a mixture of magnesium carbonate and dawsonite wherein the ratio of magnesium carbonate to dawsonite is at least 1:1.
Claim 10
Dependent Claim
195 words
A composition of matter having a UL-94 rating of at least V-1 and a Dm (flaming) of less than 400 which comprises: A. a copolymer of a styrene monomer and maleic anhydride containing from 10 to 21 percent by weight, based on the weight of the copolymer of maleic anhydride, which is modified with from 5 to 20 percent by weight based on the weight of the styrene-maleic anhydride copolymer of a polyepichlorohydrin rubber; B. from 7.5 to 15 percent by weight, based on the total weight of the composition of an aromatic bromine compound which will provide at least 6 percent by weight of bromine to the composition; C. from 3 to 12 percent by weight, based on the total weight of the composition, of a metal oxide selected from the group consisting of Sb 2 O 3 , Bi 2 O 3 , MoO 3 , SnO 2 and WO 3 ; D. from 5 to 20 percent by weight, based on the total weight of the composition of a smoke suppressant which is a mixture of magnesium carbonate and dawsonite wherein the ratio of magnesium carbonate to dawsonite is at least 1:1.
Claim 11
Dependent Claim
24 words
A composition as in claim 8 wherein the styrene monomer is selected from the group consisting of styrene, chlorostyrene, alpha-methyl styrene and mixtures thereof.
Claim 12
Dependent Claim
14 words
A composition as in claim 8 wherein the aromatic bromine compound is decabromodiphenyl oxide.
Claim 13
Dependent Claim
13 words
A composition as in claim 8 wherein the metal oxide is antimony oxide.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |