US3261885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of block-graft copolymers from polyolefines and synthetic polyamides
Assignee: Roemmler H GmbH
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Filing: 1961-10-06
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Granted: 1966-07-19
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Expires: 1981-10-06
Abstract
No abstract record available.
Inventors
- 👤 Craubner Hans
- 👤 Illing Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:54
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08G; C08G69/00; C08G69/46; C08G81/00; C08G81/02; C08G81/024; C08G81/028; C08K; C08K5/00; C08K5/04; C08K5/14; C08L23/04; C08L23/06; C08L23/10; C08L77/00; C08L77/02; C08L77/06; C08L2205/00; C08L2205/02; C08L2312/00; C08L2666/00; C08L2666/02; C08L2666/24; C08L2666/66; Y; Y10; Y10S; Y10S8/00; Y10S8/09; Y10S8/18; Y10S8/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A PROCESS FOR THE PRODUCTION OF BLACK-GRAFT COPOLYMERS WHICH COMPRISES INTENSELY KNEADING AT A SHEAR STRESS OF AT LEAST ABOUT 1.0X103 KG./CM2 AT A TEMPERATURE OF ABOUT 50*C. TO 350*C. A MIXTURE OF: (A) 1 TO 90% BY WEIGHT OF A POLYMER WHICH HAS A MELT INDEX OF ABOUT 0.05 TO 25 G./10 MIXTURES AT 190*C. AND WHICH IS SELECTED FROM THE GROUP CONSISTING OF (1) HOMOPOLYMERS OF 2 TO 4 CARBON MONOOLEFINES AND STYRENE, AND (2) COPOLYMERS OF SAID MONOOLEFINES AND OF STYRENE WITH UP TO 50% BY WEIGHT OF OTHER OLEFINICALLY UNSATURATED MONOMERS; (B) 0.95 TO 98.95% BY WEIGHT OF A SYNTHETIC LINEAR POLYAMIDE CONTAINING RECURRING -NHCO-GROUPS IN THE MAIN CHAIN AND HAVING A MELT INDEX OF ABOUT 0.4 TO 50 G./10 MINUTES AT 240*C.,; AND (C) 0.05 TO 10% BY WEIGHT OF A FREE RADICAL FORMING CATALYST SELECTED FROM THE GROUP, CONSISTING OF ORGANIC PEROXIDES, PERBENZOATES, AZO-BISNITRILES AND ZAODISULFONATES, SAID PERCENTAGES BEING BASED ON THE TOTAL WEIGHT OF THE MIXTURE.
Claim 2
Dependent Claim
163 words
A PROCESS FOR THE PRODUCTION OF BLACK-GRAFT COPOLYMERS WHICH COMPRISES INTENSELY KNEADING AT A SHEAR STRESS OF AT LEAST ABOUT 1.0X103 KG./CM2 AT A TEMPERATURE OF ABOUT 50*C. TO 350*C. A MIXTURE OF: (A) 1 TO 90% BY WEIGHT OF A POLYMER WHICH HAS A MELT INDEX OF ABOUT 0.05 TO 25 G./10 MIXTURES AT 190*C. AND WHICH IS SELECTED FROM THE GROUP CONSISTING OF (1) HOMOPOLYMERS OF 2 TO 4 CARBON MONOOLEFINES AND STYRENE, AND (2) COPOLYMERS OF SAID MONOOLEFINES AND OF STYRENE WITH UP TO 50% BY WEIGHT OF OTHER OLEFINICALLY UNSATURATED MONOMERS; (B) 0.95 TO 98.95% BY WEIGHT OF A SYNTHETIC LINEAR POLYAMIDE CONTAINING RECURRING -NHCO-GROUPS IN THE MAIN CHAIN AND HAVING A MELT INDEX OF ABOUT 0.4 TO 50 G./10 MINUTES AT 240*C.,; AND (C) 0.05 TO 10% BY WEIGHT OF A FREE RADICAL FORMING CATALYST SELECTED FROM THE GROUP, CONSISTING OF ORGANIC PEROXIDES, PERBENZOATES, AZO-BISNITRILES AND ZAODISULFONATES, SAID PERCENTAGES BEING BASED ON THE TOTAL WEIGHT OF THE MIXTURE.
References Cited (Backward Citations)
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Cited
GB679562A
Cited
US2694692A
Cited
US2888424A
Cited
FR1224392A
Cited
US3093255A
Cited
US3170004A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |