Patent US4049622A successfully refreshed from Google Patents.
US4049622A
Expired / Lapsed
US
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Self-extinguishing thermoplastic molding compositions
Assignee: BASF SE
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Filing: 1976-08-18
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Granted: 1977-09-20
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Expires: 1996-08-18
Abstract
Abstract Thermoplastic molding compositions based on styrene polymers contain, as a flameproofing agent, an organic bromine compound of the general formula <IMAGE> where X is a hydrocarbon radical and n is 0 or 1. The compositions may be used for the manufacture of self-extinguishing moldings, e.g. foams.
Inventors
- 👤 Helmut Fleig
- 👤 Helmut Hagen
- 👤 Herbert Naarmann
- 👤 Klaus Penzien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:15
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/45; C08K5/46; Y; Y10; Y10S; Y10S260/00; Y10S260/24; Y10S521/00; Y10S521/907
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
49 words
A thermoplastic molding composition comprising a styrene homopolymer or a styrene copolymer containing a flameproofing amount of an organic bromine compound of the general formula ##STR5## where X is a divalent aliphatic aromatic, cycloaliphatic or araliphatic radical of up to 12 carbon atoms and n is 0 or 1.
Claim 2
Dependent Claim
49 words
A thermoplastic molding composition comprising a styrene homopolymer or a styrene copolymer containing a flameproofing amount of an organic bromine compound of the general formula ##STR5## where X is a divalent aliphatic aromatic, cycloaliphatic or araliphatic radical of up to 12 carbon atoms and n is 0 or 1.
Claim 3
Dependent Claim
40 words
A molding composition as claimed in claim 1, which contains such amounts of the bromine compound that the bromine content of the molding composition is from 0.1 to 5% by weight, based on the total weight of the molding composition.
Claim 4
Dependent Claim
14 words
A molding composition as claimed in claim 1, wherein the bromine compound is 2,5-(tribromomethyl)-1,3,5-thiadiazole.
Claim 5
Dependent Claim
23 words
A molding composition as claimed in claim 1, wherein the styrene copolymer contains at least 50% by weight of styrene as polymerized units.
Claim 6
Dependent Claim
31 words
A molding composition as claimed in claim 1, which contains from 3 to 10% by weight, based on the styrene homopolymer or copolymer, of a liquid or gaseous organic blowing agent.
Claim 7
Dependent Claim
21 words
A molding composition as claimed in claim 1, wherein the blowing agent is an aliphatic or aromatic hydrocarbon or a halohydrocarbon.
Claim 8
Dependent Claim
22 words
A molding composition as claimed in claim 1, which is in the form of particles of diameter from 0.1 to 6 mm.
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) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |