US4628069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamides containing phenolic compounds
Assignee: Bayer AG
•
Filing: 1985-05-23
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Granted: 1986-12-09
•
Expires: 2005-05-23
Abstract
Abstract Thermoplastic polyamides containing phenolic compounds in quantities of from 0.5 to 15%, by weight, based on polyamide are less sensitive to water.
Inventors
- 👤 Rolf-Volker Meyer
- 👤 Friedrich Fahnler
- 👤 Rolf Dhein
- 👤 Dietrich Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:17
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/36; C08K5/41
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
95 words
A thermoplastic polyamide moulding composition consisting essentially of (i) one polyamide and (ii) from 3 to 15% by weight, based on polyamide, an unsubstituted or substituted C 10 -C 22 sterically unhindered monophenolic compound, which when substituted is substituted in at most of one o-position by one or more C 1 -C 12 alkyl or C 7 -C 15 aralkyl groups, or hydroxy diphenyls or hydroxy triphenyls optionally substituted by one or more C 1 -C 6 alkyl group, the rings of which may optionally be attached through --O-- or C 1 -C 3 alkylene.
Claim 2
Dependent Claim
95 words
A thermoplastic polyamide moulding composition consisting essentially of (i) one polyamide and (ii) from 3 to 15% by weight, based on polyamide, an unsubstituted or substituted C 10 -C 22 sterically unhindered monophenolic compound, which when substituted is substituted in at most of one o-position by one or more C 1 -C 12 alkyl or C 7 -C 15 aralkyl groups, or hydroxy diphenyls or hydroxy triphenyls optionally substituted by one or more C 1 -C 6 alkyl group, the rings of which may optionally be attached through --O-- or C 1 -C 3 alkylene.
Claim 3
Dependent Claim
54 words
Polyamides as claimed in claim 1, wherein as phenolic compound a member of the group tetrahydronaphthol, 2-butylphenol (sec. and t), 4-t-butylphenol, thymol, 4-t-pentylphenol, octylphenol (mixtures), nonylphenol (mixtures), dodecylphenol (mixtures), 4-hydroxydiphenyl, 2-hydroxydiphenyl, an alkyl substituted hydroxy diphenyl, 1-naphthol, 2-naphthol, benzylphenol(s), benzylcresol(s), 2-phenyl-2-(4-hydroxyphenyl)-propane, 4-hydroxydiphenyl ether, 2- or 4-cyclohexylphenol and a mixture of these compounds is used.
Claim 4
Dependent Claim
19 words
Polyamides as claimed in claim 1 wherein as phenolic compound a nonylphenol, a dodecylphenol, 2-hydroxybiphenyl or 2-phenyl-2-(4-hydroxyphenyl)-propane is used.
Claim 5
Dependent Claim
14 words
Polyamides as claimed in claim 1, wherein as polyamide polyamide-6 or polyamide-6,6 is used.
Claim 6
Dependent Claim
20 words
Polyamides as claimed in claim 1, containing 10 to 60% by weight, based on the moulding composition of reinforcing material.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-08 | 1990-06-09 | 1990-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-08 | 1994-06-09 | 1994-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-08 | 1998-06-09 | 1998-12-09 | $7700.00 | Window Closed / Lapsed |