Patent US4072641A successfully refreshed from Google Patents.
US4072641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide resins and method for manufacture
Assignee: Kraft Inc
•
Filing: 1975-10-28
•
Granted: 1978-02-07
•
Expires: 1995-10-28
Abstract
Abstract Polyamide resins of fatty acids are prepared by reacting polymeric fatty acids, an alkylene diamine, monoaminoalcohol and a chain stopping agent which includes a particular branched chain monocarboxylic fatty acid which is liquid at room temperature. The use of this particular chain stopping agent provides polyamide resins which are resistant to gelling during storage.
Inventors
- 👤 Melvin L. Loeb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:27
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/34
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
198 words
A polyamide resin resistant to gelling comprising the polycondensation reaction product of a reaction mixture of an alkylene diamine, a polymeric fatty acid and a monocarboxylic fatty acid chain stopping agent, said polymeric fatty acid having less than about 2 percent by weight of monobasic acids, from about 75 to 96 percent by weight of dibasic acids and from about 4 to about 25 percent by weight of tribasic or higher acids, said chain stopping agent including a branched chain monocarboxylic acid which is liquid at room temperature and which is selected from the group consisting of C 16 - C 20 saturated and unsaturated fatty acids wherein there are from 1 to 5 total carbons in the branching groups and the branching groups are from C 1 - C 4 , the total number of amine groups and hydroxyl groups (if any) in said reaction mixture being substantially equivalent and no more than about 10 percent more or less than the total number of carboxylic groups provided by said polymeric fatty acid and said monocarboxylic fatty acid chain stopping agent, said chain stopping agent contributing from about 8 to about 16 percent of the total carboxylic groups.
Claim 2
Dependent Claim
198 words
A polyamide resin resistant to gelling comprising the polycondensation reaction product of a reaction mixture of an alkylene diamine, a polymeric fatty acid and a monocarboxylic fatty acid chain stopping agent, said polymeric fatty acid having less than about 2 percent by weight of monobasic acids, from about 75 to 96 percent by weight of dibasic acids and from about 4 to about 25 percent by weight of tribasic or higher acids, said chain stopping agent including a branched chain monocarboxylic acid which is liquid at room temperature and which is selected from the group consisting of C 16 - C 20 saturated and unsaturated fatty acids wherein there are from 1 to 5 total carbons in the branching groups and the branching groups are from C 1 - C 4 , the total number of amine groups and hydroxyl groups (if any) in said reaction mixture being substantially equivalent and no more than about 10 percent more or less than the total number of carboxylic groups provided by said polymeric fatty acid and said monocarboxylic fatty acid chain stopping agent, said chain stopping agent contributing from about 8 to about 16 percent of the total carboxylic groups.
Claim 3
Dependent Claim
17 words
A polyamide resin in accordance with claim 1 wherein said branched chain, monocarboxylic acid is isostearic acid.
Claim 4
Dependent Claim
15 words
A polyamide resin in accordance with claim 1 wherein said reaction mixture includes an aminoalcohol.
Claim 5
Dependent Claim
15 words
A polyamide resin in accordance with claim 3 wherein said amino alcohol is monoethanol amine.
Claim 6
Dependent Claim
201 words
A process for preparing a polyamide resin having resistance to gelling by the polycondensation reaction of a reaction mixture including an alkylene diamine, polymeric fatty acid and a monocarboxylic, fatty acid chain stopping agent, said polymeric fatty acid having less than about 2 percent by weight of monobasic acids, from about 75 to 96 percent by weight of dibasic acids and from about 4 to about 25 percent by weight of tribasic or higher acids, said chain stopping agent including a branched chain monocarboxylic acid which is liquid at room temperature, and which is selected from the group consisting of C 16 - C 20 saturated and unsaturated fatty acids wherein there are from 1 to 5 total carbons in the branching groups and the branching groups are from C 1 - C 4 , the total number of amine groups and hydroxyl groups (if any) in said reaction mixture being substantially equivalent and no more than about 10 percent more or less than the total number of carboxylic groups provided by said polymeric fatty acid and said monocarboxylic fatty acid chain stopping agent, said chain stopping agent contributing from about 8 to about 16 percent of the total carboxylic groups.
Claim 7
Dependent Claim
201 words
A process for preparing a polyamide resin having resistance to gelling by the polycondensation reaction of a reaction mixture including an alkylene diamine, polymeric fatty acid and a monocarboxylic, fatty acid chain stopping agent, said polymeric fatty acid having less than about 2 percent by weight of monobasic acids, from about 75 to 96 percent by weight of dibasic acids and from about 4 to about 25 percent by weight of tribasic or higher acids, said chain stopping agent including a branched chain monocarboxylic acid which is liquid at room temperature, and which is selected from the group consisting of C 16 - C 20 saturated and unsaturated fatty acids wherein there are from 1 to 5 total carbons in the branching groups and the branching groups are from C 1 - C 4 , the total number of amine groups and hydroxyl groups (if any) in said reaction mixture being substantially equivalent and no more than about 10 percent more or less than the total number of carboxylic groups provided by said polymeric fatty acid and said monocarboxylic fatty acid chain stopping agent, said chain stopping agent contributing from about 8 to about 16 percent of the total carboxylic groups.
Claim 8
Dependent Claim
16 words
A process in accordance with claim 5 wherein said branched chain, monocarboxylic acid is isostearic acid.
Claim 9
Dependent Claim
14 words
A process in accordance with claim 5 wherein said reaction mixture includes an aminoalcohol.
Claim 10
Dependent Claim
14 words
A process in accordance with claim 5 wherein said amino alcohol is monoethanol amine.
References Cited (Backward Citations)
US3037871A
Cited
US3412115A
Cited
US3447999A
Cited
US3522270A
Cited
US3502602A
Cited
US3700618A
Cited
US3639313A
Cited
US3652469A
Cited
US3793270A
Cited
US3786007A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-06 | 1981-08-08 | 1982-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-06 | 1985-08-08 | 1986-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-06 | 1989-08-08 | 1990-02-07 | $7700.00 | Window Closed / Lapsed |