US3847723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant butyl rubber
Assignee: BP Chemicals Hitco Inc
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Filing: 1973-04-25
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Granted: 1974-11-12
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Expires: 1993-04-25
Abstract
Abstract An ambient curing butyl rubber is prepared from a composition comprising a liquid copolymer of isobutylene and isoprene, an ambient curing agent therefor such as p-quinone dioxime and lead oxide and a synergistic combination of hexabromobenzene, antimony oxide and a chlorinated paraffin as a flame retardant which renders the composition self-extinguishing without affecting the physical properties of the rubber. The composition is useful as a sprayable protective coating over urethane foam roofs.
Inventors
- 👤 E Babayan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:23
CPC Classifications
C; C09; C09D; C09D123/00; C09D123/02; C09D123/18; C09D123/20; C09D123/22; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/02; C08K5/03; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/249991; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2951
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
63 words
A FLAME RETARDANT, CURABLE, ELASTOMERIC COMPOSITION COMPRISING IN COMBINATION: A LIQUID ALKYLENE-DIENE COPOLYMER; AN EFFECTIVE AMOUNT OF A CURING AGENT FOR THE COPOLYMER; AND A COMBINATION OF FLAME RETARDANT AGENTS COMPRISING A COMBINATION OF 10-40 PARTS OF HEXABROMOBENZENE, 0-20 PARTS OF A CHLORINATED PARAFFIN CONTAINING 40-70 PERCENT CHLORINE AND 5-25 PARTS OF ANTIMONY TRIOXIDE ON THE BASIS OF 100 PARTS OF SAID COPOLYMER.
Claim 2
Dependent Claim
63 words
A FLAME RETARDANT, CURABLE, ELASTOMERIC COMPOSITION COMPRISING IN COMBINATION: A LIQUID ALKYLENE-DIENE COPOLYMER; AN EFFECTIVE AMOUNT OF A CURING AGENT FOR THE COPOLYMER; AND A COMBINATION OF FLAME RETARDANT AGENTS COMPRISING A COMBINATION OF 10-40 PARTS OF HEXABROMOBENZENE, 0-20 PARTS OF A CHLORINATED PARAFFIN CONTAINING 40-70 PERCENT CHLORINE AND 5-25 PARTS OF ANTIMONY TRIOXIDE ON THE BASIS OF 100 PARTS OF SAID COPOLYMER.
Claim 3
Dependent Claim
27 words
A composition according to claim 1 in which chlorinated paraffin is present in an amount of 5-15 parts and has a molecular weight from 800 to 1,200.
Claim 4
Dependent Claim
18 words
A composition according to claim 1 in which the solids content is between 40 percent to 70 percent.
Claim 5
Dependent Claim
43 words
A composition according to claim 3 in which the copolymer has a viscosity average molecular weight between 15,000 and 50,000 and comprises butadiene, isoprene or 2-methyl, 3-chlorobutadiene and 1 to 3 percent of a branched chain alkylene containing four to eight carbon atoms.
Claim 6
Dependent Claim
27 words
A composition according to claim 4 in which the copolymer is a copolymer of isoprene and isobutylene and the curing agent is an ambient temperature curing agent.
Claim 7
Dependent Claim
21 words
A composition according to claim 5 in which the curing agent is a combination of a quinone dioxime and an oxidizer.
Claim 8
Dependent Claim
29 words
A composition according to claim 6 in which the curing agent comprises 2-4 parts of p-quinone dioxime and 3-10 parts of lead dioxide based on 100 parts of copolymer.
Claim 9
Dependent Claim
16 words
A composition according to claim 7 further including 50-250 parts of an inert, finely divided filler.
Claim 10
Dependent Claim
39 words
A composition according to claim 8 in which the chlorinated paraffin contains 40-70 percent chlorine by weight, has a molecular weight from 800 to 1,200 and is present in an amount of 5-15 parts per 100 parts of copolymer.
Claim 11
Dependent Claim
26 words
A composition according to claim 8 in which the filler is a carbon black present in an amount of 75-200 parts per 100 parts of copolymer.
Claim 12
Dependent Claim
32 words
A self-extinguishing roof assembly comprising: a substrate; a layer of self-extinguishing polyurethane foam on said substrate; and a 5-25 mil thick cured coating of the composition of claim 1 on said layer.
Claim 13
Dependent Claim
34 words
A method of forming a self-extinguishing roofing comprising the steps of: spraying a 5-25 mil thick coating of the composition of claim 1 onto a layer of self-extinguishing polyurethane foam; and curing said coating.
References Cited (Backward Citations)
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Cited
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US3466222A
Cited
US3673128A
Cited
US3714047A
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US3686362A
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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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |