US4600752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Easy-flowing impact-resistant polyamide modified with oxycarbonyl isocyanate
Assignee: Bayer AG
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Filing: 1985-03-14
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Granted: 1986-07-15
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Expires: 2005-03-14
Abstract
Abstract Easy-flowing impact resistant polyamides are obtained by incorporating (poly)oxycarbonylisocyanates into the polyamides.
Inventors
- 👤 Rolf-Volker Meyer
- 👤 Rolf Dhein
- 👤 Bert Brassat
- 👤 Hermann Hagemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:18
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/60; C08G18/603; C08G18/70; C08G18/71; C08G18/711; C08G18/72; C08G18/77; C08G18/771; C08G69/00; C08G69/48
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
121 words
A thermoplastic, easy-flowing polyamide selected from polylactam of a lactam having from 6 to 12 carbon atoms in the lactam ring, polycondensate of diamine and dicarboxylic acid or mixtures thereof modified by incorporating therein at least one oxycarbonyl isocyanate of the formula ##STR2## wherein n is an integer of from 1 to 4 and R is an n-valent radical selected from the group consisting of C 1 -C 20 aliphatic radicals, C 7 -C 30 araliphatic radicals, C 6 -C 22 aromatic radicals and radicals of the formula ##STR3## wherein R' is independently hydrogen or a C 1 -C 4 alkyl radical, m is an integer of from 2 to 4 and n' is an integer of from 1 to 200.
Claim 2
Dependent Claim
121 words
A thermoplastic, easy-flowing polyamide selected from polylactam of a lactam having from 6 to 12 carbon atoms in the lactam ring, polycondensate of diamine and dicarboxylic acid or mixtures thereof modified by incorporating therein at least one oxycarbonyl isocyanate of the formula ##STR2## wherein n is an integer of from 1 to 4 and R is an n-valent radical selected from the group consisting of C 1 -C 20 aliphatic radicals, C 7 -C 30 araliphatic radicals, C 6 -C 22 aromatic radicals and radicals of the formula ##STR3## wherein R' is independently hydrogen or a C 1 -C 4 alkyl radical, m is an integer of from 2 to 4 and n' is an integer of from 1 to 200.
Claim 3
Dependent Claim
47 words
Polyamide as claimed in claim 1, wherein R represents a radical of the general formula: ##STR4## wherein each R' independently represents H or a C 1 -C 4 alkyl radical, m represents an integer from 2 to 4, and n' represents an integer from 1 to 200.
Claim 4
Dependent Claim
21 words
Polyamide as claimed in claim 2, wherein each R' represents a methyl radical, and n represents an integer from 10to 50.
Claim 5
Dependent Claim
15 words
Polyamide as claimed in claim 1 containing 0.5 to 15% by weight of the modifier.
Claim 6
Dependent Claim
10 words
Moulded article produced from polyamide as claimed in claim 1.
Claim 7
Dependent Claim
91 words
A thermoplastic, easy-flowing polyamide selected from polylactam of a lactam having from 6 to 12 carbon atoms in the lactam ring, polycondensate of diamine and dicarboxylic acid or mixtures thereof modified by incorporating therein at least one oxycarbonyl isocyanate of the formula ##STR5## wherein R is a C 1 -C 20 aliphatic radical, a C 7 -C 30 araliphatic radical, a C 6 -C 22 aromatic radical, or a (poly)radical which is a (poly)ether, (poly)ester, (poly)urethane or polyester(amide) radical, each having an average molecular weight Mw of from 200 to 8000.
Claim 8
Dependent Claim
91 words
A thermoplastic, easy-flowing polyamide selected from polylactam of a lactam having from 6 to 12 carbon atoms in the lactam ring, polycondensate of diamine and dicarboxylic acid or mixtures thereof modified by incorporating therein at least one oxycarbonyl isocyanate of the formula ##STR5## wherein R is a C 1 -C 20 aliphatic radical, a C 7 -C 30 araliphatic radical, a C 6 -C 22 aromatic radical, or a (poly)radical which is a (poly)ether, (poly)ester, (poly)urethane or polyester(amide) radical, each having an average molecular weight Mw of from 200 to 8000.
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) | 1989-07-14 | 1990-01-13 | 1990-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-14 | 1994-01-13 | 1994-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-14 | 1998-01-13 | 1998-07-15 | $7700.00 | Window Closed / Lapsed |