US3985831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant graft polymer compositions prepared from phosphinyl-substituted acrylonitriles
Assignee: GE Chemicals Inc
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Filing: 1975-06-30
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Granted: 1976-10-12
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Expires: 1995-06-30
Abstract
Abstract Flame retardant graft polymers are prepared by graft polymerizing a phosphinyl-substituted acrylonitrile and at least one other vinyl monomer copolymerizable therewith in the presence of a rubber substrate. Polymers containing greater than 0.6% by weight, preferably 0.8 to 12.0% by weight, phosphorus exhibit flame retardant characteristics, which may be further improved by compounding with bis-halophenoxyalkanes.
Inventors
- 👤 Nicodemus E. Boyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:31
CPC Classifications
C; C08; C08F; C08F279/00; C08F279/02; C08L; C08L51/00; C08L51/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
173 words
A flame retardant composition comprising a graft copolymer prepared by copolymerizing a phosphinyl-substituted acrylonitrile monomer of the formula: ##EQU1## wherein one A is a phosphinyl group of the formula: ##EQU2## wherein R and R' are independently selected from the group 1 to 4 carbon atom alkyl, halo-substituted 1 to 4 carbon atom alkyl, and 2 to 4 carbon atom alkenyl, and n is 0 or 1, and the remaining A is selected from the group --H, 1 to 4 carbon atom alkyl, and halo-substituted 1 to 4 carbon atom alkyl, with at least one vinyl monomer copolymerizable therewith, in the presence of from 10% to about 45% by weight based on the total composition of a rubbery polymer of a 4 to 6 carbon atom conjugated diene and a bis-(haloaryloxy)alkane of the formula: X.sub.n -- Ar-- O-- (CH.sub.2).sub.m -- O-- Ar-- X.sub.n wherein X is a halogen selected from the group chlorine, fluorine, bromine and iodine, Ar is substituted phenylene or naphthylene, m is 1 to 6 and n is 1 to 7.
Claim 2
Dependent Claim
173 words
A flame retardant composition comprising a graft copolymer prepared by copolymerizing a phosphinyl-substituted acrylonitrile monomer of the formula: ##EQU1## wherein one A is a phosphinyl group of the formula: ##EQU2## wherein R and R' are independently selected from the group 1 to 4 carbon atom alkyl, halo-substituted 1 to 4 carbon atom alkyl, and 2 to 4 carbon atom alkenyl, and n is 0 or 1, and the remaining A is selected from the group --H, 1 to 4 carbon atom alkyl, and halo-substituted 1 to 4 carbon atom alkyl, with at least one vinyl monomer copolymerizable therewith, in the presence of from 10% to about 45% by weight based on the total composition of a rubbery polymer of a 4 to 6 carbon atom conjugated diene and a bis-(haloaryloxy)alkane of the formula: X.sub.n -- Ar-- O-- (CH.sub.2).sub.m -- O-- Ar-- X.sub.n wherein X is a halogen selected from the group chlorine, fluorine, bromine and iodine, Ar is substituted phenylene or naphthylene, m is 1 to 6 and n is 1 to 7.
Claim 3
Dependent Claim
52 words
The composition of claim 1 wherein the vinyl monomer is selected from the group styrene, alkylstyrene, halostyrene, acrylonitrile, alkylacrylonitrile, halo-acrylonitrile, acrylic acid, alkylacrylic acid, and alkyl esters of acrylic acid and alkylacrylic acid, and the rubbery polymer is selected from the group polybutadiene, polyisoprene, polychloroprene, styrene-butadiene rubber, nitrile rubber, and acrylic rubber.
Claim 4
Dependent Claim
30 words
The composition of claim 1 wherein said phosphinyl-substituted acrylonitrle is employed in an amount sufficient to provide from 0.6% to about 12% by weight phosphorus, based on the total composition.
Claim 5
Dependent Claim
33 words
The flame retardant composition of claim 1 further comprising at least one additive selected from the group chlorinated polyethylene, polyvinyl chloride, antimony oxide, and the zinc, magnesium, and barium salts of boric acid.
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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) | 1979-10-12 | 1980-04-12 | 1980-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-12 | 1984-04-12 | 1984-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-12 | 1988-04-12 | 1988-10-12 | $7700.00 | Window Closed / Lapsed |