US4158086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flameproof thermoplastic molding material
Assignee: BASF SE
•
Filing: 1978-07-28
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Granted: 1979-06-12
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Expires: 1998-07-28
Abstract
Abstract A flameproof thermoplastic molding material based on a styrene polymer and containing from 0.05 to 5 percent by weight of an organic bromine compound as the flameproofing agent, with or without a blowing agent, wherein the bromine compound contains a heterocyclic ring, comprising the group ##STR1## IN ITS MOLECULE, AND IS HEAT-STABLE UP TO AT LEAST 150° C. The preferred bromine compound has the formula ##STR2## The molding materials may be used for the manufacture of self-extinguishing moldings, eg. foam moldings.
Inventors
- 👤 Helmut Hagen
- 👤 Herbert Naarmann
- 👤 Klaus Penzien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:32
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3467; C08K5/3477; C08K5/3492; Y; Y10; Y10S; Y10S260/00; Y10S260/24; Y10S521/00; Y10S521/907
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
118 words
A flameproof thermoplastic molding material based on a styrene polymer and containing from 0.05 to 5 percent by weight of an organic bromine compound as the flameproofing agent, with or without a blowing agent, wherein the bromine compound conforms to the following requirements: (a) the compound contains in its molecule at least one six membered heterocyclic ring with at least one nitrogen as a hetero-atom, (b) the molecule contains at least one ##STR6## group, where --N═C-- is a part of the heterocyclic ring, (c) the compound is sufficiently heat-stable at 150° C. that the weight loss on heating for one hour at this temperature is less than 1%, and (d) the compound is not a derivative of 1,3,4-thiadiazole.
Claim 2
Dependent Claim
118 words
A flameproof thermoplastic molding material based on a styrene polymer and containing from 0.05 to 5 percent by weight of an organic bromine compound as the flameproofing agent, with or without a blowing agent, wherein the bromine compound conforms to the following requirements: (a) the compound contains in its molecule at least one six membered heterocyclic ring with at least one nitrogen as a hetero-atom, (b) the molecule contains at least one ##STR6## group, where --N═C-- is a part of the heterocyclic ring, (c) the compound is sufficiently heat-stable at 150° C. that the weight loss on heating for one hour at this temperature is less than 1%, and (d) the compound is not a derivative of 1,3,4-thiadiazole.
Claim 3
Dependent Claim
27 words
A flameproof thermoplastic molding material as claimed in claim 1, which contains from 3 to 10 percent by weight of a liquid or gaseous organic blowing agent.
Claim 4
Dependent Claim
16 words
A flameproof thermoplastic molding material as claimed in claim 1, wherein the bromine compound is 2,4,6-tris-(tribromomethyl)-1,3,5-triazine.
References Cited (Backward Citations)
GB950292A
Cited
US3843650A
Cited
US3950306A
Cited
US4039538A
Cited
US4049622A
Cited
US4046735A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-06-11 | 1982-12-11 | 1983-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-11 | 1986-12-11 | 1987-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-11 | 1990-12-11 | 1991-06-12 | $7700.00 | Window Closed / Lapsed |