US4107231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-retardant linear polyesters
Assignee: BASF SE
•
Filing: 1976-03-23
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Granted: 1978-08-15
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Expires: 1996-03-23
Abstract
Abstract Flame-proofed linear polyesters containing, as flame-proofing agents, halogenated oligomeric styrenes and synergistic compounds.
Inventors
- 👤 Rolf Wurmb
- 👤 Wolfgang Seydl
- 👤 Klaus Penzien
- 👤 Hermann Gausepohl
- 👤 Hans-Josef Sterzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:41
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/02; C08K5/03; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08L; C08L25/00; C08L25/02; C08L67/00; C08L67/02; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
58 words
Linear polyesters flame-proofed with halogenous flame-proofing agents and synergists and optionally containing fillers and reinforcing fibers, the flame-proofing agents being halogenated oligomeric styrenes of the formula I ##STR2## where x denotes halogen, R denotes hydrogen or an aliphatic radical, n is an integer of from 3 to 20 and m is an integer of from 1 to 5.
Claim 2
Dependent Claim
58 words
Linear polyesters flame-proofed with halogenous flame-proofing agents and synergists and optionally containing fillers and reinforcing fibers, the flame-proofing agents being halogenated oligomeric styrenes of the formula I ##STR2## where x denotes halogen, R denotes hydrogen or an aliphatic radical, n is an integer of from 3 to 20 and m is an integer of from 1 to 5.
Claim 3
Dependent Claim
13 words
Linear polyesters as set forth in claim 1 wherein the halogen is bromine.
Claim 4
Dependent Claim
29 words
Polyester compositions as set forth in claim 2, wherein the content of halogenated oligomeric styrenes is such that the bromine content of the composition is from 3 to 10%.
Claim 5
Dependent Claim
14 words
Polyester compositions as set forth in claim 2, wherein the polyester is polybutylene terephthalate
Claim 6
Dependent Claim
14 words
Polyester compositions as claimed in claim 2, wherein the synergistic substance is antimony trioxide.
Claim 7
Dependent Claim
30 words
Linear polyesters as set forth in claim 5 wherein the bromine content in the composition is 5 to 8% and the amount of antimony trioxide is from 2 to 10%.
Claim 8
Dependent Claim
12 words
Linear polyesters as set forth in claim 2 wherein R is H.
Claim 9
Dependent Claim
13 words
Linear polyesters as set forth in claim 2 wherein R is lower alkyl.
References Cited (Backward Citations)
US3039977A
Cited
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US3943195A
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Cited
US3975354B1
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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) | 1981-08-14 | 1982-02-13 | 1982-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-14 | 1986-02-13 | 1986-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-14 | 1990-02-13 | 1990-08-15 | $7700.00 | Window Closed / Lapsed |