US4312958A
Expired / Lapsed
US
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Fire-retardant, rubber-modified, monocarboxylic acid copolymers
Assignee: Lyondell Chemical Technology LP
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Filing: 1981-04-17
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Granted: 1982-01-26
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Expires: 2001-04-17
Abstract
Abstract Rubber-modified copolymers of monovinyl aromatic monomers and ethylenically unsaturated monocarboxylic acid monomers are blended with water as a blowing agent, bromodiphenylethers as fire retardants, and metal oxides as synergist for the ethers to form a composition which can be foamed to densities of between 1 and 10 pounds per cubic foot, said foam composition having fire-retardant properties.
Inventors
- 👤 Adolph V. DiGiulio
- 👤 Jack N. Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:48
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08J9/0066; C08J9/04; C08J9/12; C08J9/125; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/2279; C08K5/00; C08K5/04; C08K5/06; C08J2325/00; C08J2421/00; Y; Y10; Y10S; Y10S521/00; Y10S521/907
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
141 words
A fire-retardant foam composition having a density of between 1 and 10 pounds per cubic foot and consisting of a rubber-modified copolymer, from 10 to 20 parts per hundred parts of copolymer of an at least tribrominated diphenyether, and 4 to 8 parts per hundred parts of copolymer of a metal oxide synergist for the ether; said rubber-modified copolymer consisting of (a) 5 to 40 weight percent of a rubber selected from the group consisting of homopolymers of conjugated dienes, copolymers of said conjugated dienes with up to 50 weight percent of one or more monoolefinically unsaturated monomers, ethylene-propylene-diene terpolymer rubbers, acrylate-diene copolymer rubbers and mixtures thereof and (b) 95 to 60 weight percent of a copolymer of 70 to 95 mole percent of a monovinyl aromatic monomer and 5 to 30 mole percent of an ethylenically unsaturated monocarboxylic acid monomer.
Claim 2
Dependent Claim
141 words
A fire-retardant foam composition having a density of between 1 and 10 pounds per cubic foot and consisting of a rubber-modified copolymer, from 10 to 20 parts per hundred parts of copolymer of an at least tribrominated diphenyether, and 4 to 8 parts per hundred parts of copolymer of a metal oxide synergist for the ether; said rubber-modified copolymer consisting of (a) 5 to 40 weight percent of a rubber selected from the group consisting of homopolymers of conjugated dienes, copolymers of said conjugated dienes with up to 50 weight percent of one or more monoolefinically unsaturated monomers, ethylene-propylene-diene terpolymer rubbers, acrylate-diene copolymer rubbers and mixtures thereof and (b) 95 to 60 weight percent of a copolymer of 70 to 95 mole percent of a monovinyl aromatic monomer and 5 to 30 mole percent of an ethylenically unsaturated monocarboxylic acid monomer.
Claim 3
Dependent Claim
33 words
The foam composition of claim 1 wherein the synergist for the ether is a metal oxide selected from the group consisting of antimony trioxide, bismuth oxide, molybdenum oxide, stannic oxide and tungsten oxide.
Claim 4
Dependent Claim
33 words
The foam composition of claim 1 wherein the monovinyl aromatic monomer of said copolymer is selected from the group consisting of styrene, alpha-methylstyrene, nuclear-methylstyrenes, ethylstyrenes, isopropylstyrenes, tert-butylstyrenes, chlorostyrenes, dichlorostyrenes, vinylnaphthalene and mixtures thereof.
Claim 5
Dependent Claim
26 words
The foam composition of claim 1 wherein the diphenylether is selected from the group consisting of tribromodiphenylether, tetrabromodiphenylether, pentabromodiphenylether, tribromochlorodiphenylether, tribromodichlorodiphenylether, tribromotrichlorodiphenylether, tetrabromodichlorodiphenylether, octabromodiphenylether and decarbromodiphenylether.
Claim 6
Dependent Claim
23 words
The foam composition of claim 1 wherein the monocarboxylic acid monomer is selected from the group consisting of acrylic acid and methacrylic acid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-25 | 1985-07-27 | 1986-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-25 | 1989-07-27 | 1990-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-25 | 1993-07-27 | 1994-01-26 | $7700.00 | Window Closed / Lapsed |