Patent US3957722A successfully refreshed from Google Patents.
US3957722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-resistant polybutadiene resin
Assignee: Bridgestone Firestone Inc
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Filing: 1975-01-16
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Granted: 1976-05-18
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Expires: 1995-01-16
Abstract
Abstract The incorporation of a combination of [1] a bromine-releasing flame-retarding compound (e.g., tetrabromobenzene, hexabromobenzene, decabromodiphenyl oxide, etc.) and [2] a zinc O,O-dihydrocarbyl phosphorodithioate (e.g., a dialkyl or diaryl derivative) or a chelated complex containing vanadium (III) or manganese (II) (e.g., such as acetonylacetonate, etc.) in a polybutadiene resin, renders the resin flame resistant.
Inventors
- 👤 David F. Lawson
- 👤 Delmar F. Lohr, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:09
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/02; C08K5/0091; C08K5/04; C08K5/06; C08K5/07; C08K5/49
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
128 words
A peroxide-cured or peroxide-curable polybutadiene polymer or copolymer with styrene resin which includes as a flame-retarding agent, per 100 parts by weight of the resin, (1) substantially 10 parts by weight of tetrabromobenzene and (2) substantially 0.5 to 2 parts of zinc -0,0- dihydrocarbyl phosphorodithioate in which the hydrocarbyl group is an alkyl group containing from 1 to 20 carbons, said resin being from the class consisting of homopolymers of butadiene and copolymers of butadiene and styrene containing at least 40 per cent by weight of butadiene, the ratio of the atoms of bromine to the atoms of metal being at least substantially 2 to 1, and at least 80 percent by weight of the butadiene repeating units in the homopolymer or copolymer being in the 1,2 configuration.
Claim 2
Dependent Claim
128 words
A peroxide-cured or peroxide-curable polybutadiene polymer or copolymer with styrene resin which includes as a flame-retarding agent, per 100 parts by weight of the resin, (1) substantially 10 parts by weight of tetrabromobenzene and (2) substantially 0.5 to 2 parts of zinc -0,0- dihydrocarbyl phosphorodithioate in which the hydrocarbyl group is an alkyl group containing from 1 to 20 carbons, said resin being from the class consisting of homopolymers of butadiene and copolymers of butadiene and styrene containing at least 40 per cent by weight of butadiene, the ratio of the atoms of bromine to the atoms of metal being at least substantially 2 to 1, and at least 80 percent by weight of the butadiene repeating units in the homopolymer or copolymer being in the 1,2 configuration.
Claim 3
Dependent Claim
12 words
The composition of claim 1 in which the resin is butadiene homopolymer.
Claim 4
Dependent Claim
12 words
The composition of claim 2 in which the alkyl group is isopropyl.
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) | 1979-05-18 | 1979-11-17 | 1980-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-18 | 1983-11-17 | 1984-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-18 | 1987-11-17 | 1988-05-18 | $7700.00 | Window Closed / Lapsed |