Flameproofed crystalline copolymers of propylene and ethylene
Abstract
Abstract THIS INVENTION RELATES TO FLAMEPROOFED THERMOPLASTIC POLYMER COMPOSITIONS COMPRISING (1) A CRYSTALLINE COPOLYMER OF PROPYLENE AND ETHYLENE CONTAINING FROM 725% BY WEIGHT OF ETHYLENE AND HAVING A MELT FLOW RATE (ASTM D-1238) LESS THAN 3; (2) A CHLORINATED FLAMEPROOFING COMPOUND CONTAINING AT LEAST 50% BY WEIGHT CHLORINE IN AN AMOUNT TO PROVIDE FROM 11-16% BY WEIGHT CHLORINE IN THE TOTAL COMPOSITION; AND (3) ANTIMONY OXIDE IN THE AMOUNT OF 10-25% BY WEIGHT OF SAID COPOLYMER, SAID COMPOSITION BEING CHARACTERIZED BY HAVING A MELT FLOW RATE (ASTM D-1238) NO HIGHER THAN 2.2, A DENSITY NO HIGHER THAN 1.16, AND A DEFLECTION TEMPERATURE (ASTM D-648) AT LEAST AS HIGH AS THAT OF COMPONENT (1).
Inventors
- 👤 Walter E Gloor
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |