US3228996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crosslinking linear high molecular weight polyamides with peroxides
Assignee: BASF SE
•
Filing: 1962-05-10
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Granted: 1966-01-11
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Expires: 1982-05-10
Abstract
No abstract record available.
Inventors
- 👤 Illing Gerhard
- 👤 Linge Hermann
- 👤 Schoeffel Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:17
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/14; Y; Y10; Y10S; Y10S8/00; Y10S8/18; Y10S8/21
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
109 words
A PROCESS FOR THE PRODUCTION OF A CROSSLIKED POLYAMIDE WHICH COMPRISES INTENSELY KNEADING UNDER A SHEAR STRESS OF THE ORDER OF MANGITUDE OF 1.5X10**3 KG./SQ. CM. AT A TEMPERATURE BETWEEN ABOUT 190*C. AND 350*C. A MIXTURE OF: (A) A MOLTEN HIGH MOLECULAR WEIGHT LINEAR POLYAMIDE CHARACTERIZED BY RECURRING -CONH- UNITS IN AN OTHERWISE HYDROCARBON CHAIN OF THE POLYMER MOLECULE AND HAVING A K-VALUE BETWEEN 65 AND 100, MEASURED AS A 1% SOLUTION IN CONCENTRATED SULFURIC ACID AT 25*C.; AND (B) ABOUT 0.1 TO 2% BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE MIXTURE, OF AN ORGANIC PEROXIDE WHICH DECOMPOSES AT A TEMPERATURE BETWEEN ABOUT ROOM TEMPERATURE AND 350*C.
Claim 2
Dependent Claim
109 words
A PROCESS FOR THE PRODUCTION OF A CROSSLIKED POLYAMIDE WHICH COMPRISES INTENSELY KNEADING UNDER A SHEAR STRESS OF THE ORDER OF MANGITUDE OF 1.5X10**3 KG./SQ. CM. AT A TEMPERATURE BETWEEN ABOUT 190*C. AND 350*C. A MIXTURE OF: (A) A MOLTEN HIGH MOLECULAR WEIGHT LINEAR POLYAMIDE CHARACTERIZED BY RECURRING -CONH- UNITS IN AN OTHERWISE HYDROCARBON CHAIN OF THE POLYMER MOLECULE AND HAVING A K-VALUE BETWEEN 65 AND 100, MEASURED AS A 1% SOLUTION IN CONCENTRATED SULFURIC ACID AT 25*C.; AND (B) ABOUT 0.1 TO 2% BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE MIXTURE, OF AN ORGANIC PEROXIDE WHICH DECOMPOSES AT A TEMPERATURE BETWEEN ABOUT ROOM TEMPERATURE AND 350*C.
Claim 3
Dependent Claim
78 words
A PROCESS AS CLAIMED IN CLAIM 1 WHEREIN THERE IS ADDED TO SAID MIXTURE OF (A) AND (B) ABOUT 0.05 TO 2% BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE MIXTURE, OF A LOW MOLECULAR WEIGHT LINEAR POLYAMIDE CHARACTERIZED BY RECURRING -COHN- UNITS IN AN OTHERWISE HYDROCARBON CHAIN OF THE POLYMER MOLECULE, A MELTING POINT OF ABOVE 250*C. AND A K-VALUE BETWEEN ABOUT 10 AND 40, MEASURED AS A 1% SOLUTION IN CONCENTRATED SULFURIC ACID AT 25*C.
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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |