Patent US4048135A successfully refreshed from Google Patents.
US4048135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester molding compositions of reduced flammability
Assignee: BASF SE
•
Filing: 1976-03-08
•
Granted: 1977-09-13
•
Expires: 1996-03-08
Abstract
Abstract Thermoplastic, linear, saturated polyesters containing flameproofing agents consisting of halogen compounds and an antimony trioxide which has been prepared in an aqueous suspension of an inorganic support using an aqueous antimony(III) halide solution and adding an aqueous solution of a base to raise the pH to from 6 to 8 with precipitation of the antimony compound onto the support, followed by separation of the solids from the aqueous phase.
Inventors
- 👤 Rolf Wurmb
- 👤 Bernd Leutner
- 👤 Wolfgang Seydl
- 👤 Hans-Ulrich Schlimper
- 👤 Hans-Josef Sterzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:21
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/2279
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
86 words
Thermoplastic molding composition composed of A. a linear saturated polyester, and B. from 6 to 30% by weight, based on the total weight of the molding composition, of a flameproofing additive of an organic halogen compound and antimony trioxide, said antimony trioxide having been precipitated onto a support from an aqueous antimony (III) halide solution by the addition of an aqueous solution of a base to increase the pH to from 6 to 8, followed by isolation of the solids from the aqueous phase, said support
Claim 2
Dependent Claim
86 words
Thermoplastic molding composition composed of A. a linear saturated polyester, and B. from 6 to 30% by weight, based on the total weight of the molding composition, of a flameproofing additive of an organic halogen compound and antimony trioxide, said antimony trioxide having been precipitated onto a support from an aqueous antimony (III) halide solution by the addition of an aqueous solution of a base to increase the pH to from 6 to 8, followed by isolation of the solids from the aqueous phase, said support
Claim 3
Dependent Claim
16 words
A molding composition as set forth in claim 1 wherein said support is talc or kaolin.
Claim 4
Dependent Claim
32 words
A molding composition as set forth in claim 1 wherein said composition further contains from 10 to 60% by weight, based on the total weight of the molding composition, of reinforcing fillers.
Claim 5
Dependent Claim
23 words
A molding composition as set forth in claim 2 wherein said support has a particle size range of from 0.1 to 100 μm.
Claim 6
Dependent Claim
28 words
A molding composition as set forth in claim 1 wherein the amount of said support antimony (III) oxide by weight in said composition is from 2 to 15%.
Claim 7
Dependent Claim
29 words
A molding composition as set forth in claim 5 wherein said composition has an antimony (III) oxide content of from 30 to 60% by weight relative to the support.
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) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |