Patent US4921932A successfully refreshed from Google Patents.
US4921932A
Expired / Lapsed
US
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Polyamide resin
Assignee: Mitsubishi Chemical Corp
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Filing: 1988-08-05
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Granted: 1990-05-01
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Expires: 2008-08-05
Abstract
Abstract A copolyamide resin containing a dimerized fatty acid as a copolymer component, which has (1) at least 25 equivalent %, based on the total number of terminal groups, of hydrocarbon groups having from 6 to 22 carbon atoms at its terminals, (2) a content of a dimerized fatty acid of from 0.1 to 40% by weight based on the total amount of the resin, and (3) a melt viscosity as measured at 240 DEG C. of from 2,000 to 15,000 poise.
Inventors
- 👤 Mitsuhiko Tamura
- 👤 Masaaki Miyamoto
- 👤 Hidemi Nakanishi
- 👤 Takayoshi Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:51
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/14; C08G69/00; C08G69/02; C08G69/26; C08G69/34
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
80 words
A copolyamide resin containing a dimerized fatty acid as a copolymer component, which has (1) at least 25 equivalent %, based on the total number of terminal groups, of hydrocarbon groups having from 6 to 22 carbon atoms at its terminals, (2) a content of a dimerized fatty acid of from 0.1 to 40% by weight based on the total amount of the resin, and (3) a melt viscosity as measured at 240° C. of from 2,000 to 15,000 poise.
Claim 2
Dependent Claim
80 words
A copolyamide resin containing a dimerized fatty acid as a copolymer component, which has (1) at least 25 equivalent %, based on the total number of terminal groups, of hydrocarbon groups having from 6 to 22 carbon atoms at its terminals, (2) a content of a dimerized fatty acid of from 0.1 to 40% by weight based on the total amount of the resin, and (3) a melt viscosity as measured at 240° C. of from 2,000 to 15,000 poise.
Claim 3
Dependent Claim
22 words
The copolyamide resin according to claim 1, wherein the copolyamide resin is a copolymer comprising polycapramide or polyhexamethyleneadipamide as the main component.
Claim 4
Dependent Claim
37 words
The copolyamide resin according to claim 1, which is obtained by copolymerizing (a) a polyamide forming material, (b) a dimerized fatty acid, (c) a diamine and (d) a monocarboxylic acid having from 7 to 23 carbon atoms.
Claim 5
Dependent Claim
20 words
The copolyamide resin according to claim 3, wherein the polyamide forming material (a) is ε-caprolactam or hexamethylenediamine and adipic acid.
Claim 6
Dependent Claim
29 words
The copolyamide resin according to claim 3, wherein the dimerized fatty acid (b) is a polymerized fatty acid containing at least 70% by weight of a dimerized fatty acid.
Claim 7
Dependent Claim
29 words
The copolyamide resin according to claim 3, wherein the dimerized fatty acid (b) is a polymerized fatty acid containing at least 95% by weight of a dimerized fatty acid.
Claim 8
Dependent Claim
29 words
The copolyamide resin according to claim- 3, wherein the dimerized fatty acid (b) is a polymerized fatty acid containing at least 98% by weight of a dimerized fatty acid.
Claim 9
Dependent Claim
21 words
The copolyamide resin according to claim 3, wherein the diamine (c) is a diamine having from 2 to 22 carbon atoms.
Claim 10
Dependent Claim
13 words
The copolyamide resin according to claim 3, wherein the diamine (c) is hexamethylenediamine.
Claim 11
Dependent Claim
23 words
The copolyamide resin according to claim 3, wherein the monocarboxylic acid (d) is a monocarboxylic acid having from 12 to 18 carbon atoms.
Claim 12
Dependent Claim
15 words
The copolyamide resin according to claim 3, wherein the monocarboxylic acid (d) is stearic acid.
Claim 13
Dependent Claim
30 words
The copolyamide resin according to claim 3, wherein the monocarboxylic acid (d) is reacted in an amount of from 20 to 150 μeq/g relative to the polyamide forming material (a).
Claim 14
Dependent Claim
30 words
The copolyamide resin according to claim 3, wherein the monocarboxylic acid (d) is reacted in an amount of from 25 to 100 μeq/g relative to the polyamide forming material (a).
Claim 15
Dependent Claim
29 words
The copolyamide resin according to claim 1, wherein the content of dimerized fatty acid is from 0.5 to 30% by weight based on the total amount of the resin.
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) | 1993-04-30 | 1993-10-30 | 1994-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-30 | 1997-10-30 | 1998-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-30 | 2001-10-30 | 2002-05-01 | $7700.00 | Window Closed / Lapsed |