US4543378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide composition
Assignee: Nissan Motor Co Ltd
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Filing: 1983-07-20
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Granted: 1985-09-24
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Expires: 2003-07-20
Abstract
Abstract A polyamide composition having an enhanced adhesion to coatings, which comprises a polyamide with a ratio of the terminal amino group concentration to the terminal carboxyl group concentration of at least 1.5, an inorganic filler, and a triazine, wherein the amount of the inorganic filler is from 1 to 150 weight parts per 100 weight parts of the polyamide and the amount of the triazine is more than 1 weight part per 100 weight parts of the sum of the polyamide and the inorganic filler.
Inventors
- 👤 Akito Suhara
- 👤 Kazuhiko Takasugi
- 👤 Toshihide Sato
- 👤 Masashi Ono
- 👤 Kazuo Higuchi
- 👤 Tatsuya Chiba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:06
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3467; C08K5/3477; C08K5/3492
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
94 words
A polyamide composition comprising a polyamide with a ratio of the terminal amino group concentration to the terminal carboxyl group concentration of at least 1.5, an inorganic filler, and a triazine, wherein the amount of the inorganic filler is in the range of from 1 to 150 parts by weight per 100 parts by weight of the polyamide and the amount of the triazine is more than 1 part by weight but not more than 5 parts by weight per 100 parts by weight of the sum of the polyamide, and the inorganic filler.
Claim 2
Dependent Claim
94 words
A polyamide composition comprising a polyamide with a ratio of the terminal amino group concentration to the terminal carboxyl group concentration of at least 1.5, an inorganic filler, and a triazine, wherein the amount of the inorganic filler is in the range of from 1 to 150 parts by weight per 100 parts by weight of the polyamide and the amount of the triazine is more than 1 part by weight but not more than 5 parts by weight per 100 parts by weight of the sum of the polyamide, and the inorganic filler.
Claim 3
Dependent Claim
29 words
A polyamide composition according to claim 1 wherein said polyamide has a ratio of the terminal amino group concentration to the terminal carboxyl group concentration of at least 2.0.
Claim 4
Dependent Claim
19 words
A polyamide composition according to claim 1 wherein said polyamide has a relative viscosity of from 2.3 to 4.4.
Claim 5
Dependent Claim
38 words
A polyamide composition according to claim 1 wherein said inorganic filler is selected from the group consisting of metal oxides, metal salts of an inorganic acid, metal fibers, a carbon fiber, a metal titanate fiber, and mixtures thereof.
Claim 6
Dependent Claim
23 words
A polyamide composition according to claim 1 wherein said inorganic filler is selected from the group consisting of talc, kaolin, and calcium silicate.
Claim 7
Dependent Claim
28 words
A polyamide composition according to claim 1 wherein said inorganic filler is in the form of particles having an average particle size of not more than 20 μm.
Claim 8
Dependent Claim
34 words
A polyamide composition according to claim 1 wherein the amount of said inorganic filler is in the range of from 10 to 100 parts by weight per 100 parts by weight of the polyamide.
Claim 9
Dependent Claim
27 words
A polyamide composition according to claim 1 wherein said triazine is selected from the group consisting of melamine, cyanuric acid, melamine cyanurate, methylene dimelamine, and ethylene dimelamine.
Claim 10
Dependent Claim
27 words
A polyamide composition according to claim 1 wherein said triazine is in the form of particles having an average particle size of not more than 20 μm.
References Cited (Backward Citations)
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US4001177A
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US4013601A
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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) | 1988-09-23 | 1989-03-25 | 1989-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-23 | 1993-03-25 | 1993-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-23 | 1997-03-25 | 1997-09-24 | $7700.00 | Window Closed / Lapsed |