Claims
- 1. A copolymer of polyaspartic acid, a polycarboxylic acid and a polyamine.
- 2. The copolymer of claim 1 wherein the polyamine has at least one primary amine and wherein the additional amine group or groups consist of at least one primary or secondary amine.
- 3. The copolymer of claim 2 wherein the polyamine is selected from the group consisting of diethylene triamine, a polyoxyalkyleneamine diamine or triamine, melamine, an alkyl diamine or triamine, ethylene diamine and hexanediamine.
- 4. The copolymer of claim 1 wherein the polycarboxylic acid is selected from the group consisting of adipic acid, citric acid, fumaric acid, malic acid, malonic acid, succinic acid, glutaric acid, oxalic acid, pimelic acid, itaconic acid, nonanedioic acid, dodecanedioic acid, octanedioic acid, isophthalic, terphthalic and phthalic acid.
Parent Case Info
This application is a continuation of application Ser. No. 08/421,485, filed on Apr. 13, 1995, which issued to U.S. Pat. No. 5,708,126 on Jan. 13, 1988, which in turn was a divisional of U.S. patent application Ser. No. 07/994,922, filed on Dec. 22, 1992, now U.S. Pat. No. 5,408,028. The entire disclosures of U.S. patent application Ser. Nos. 08/421,485 and 07/994,922 as originally filed are hereby expressly incorporated by reference in the present continuation application.
US Referenced Citations (31)
Foreign Referenced Citations (2)
Number |
Date |
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B-4015593 |
Jan 1994 |
AUX |
B-6303494 |
Nov 1994 |
AUX |
Divisions (1)
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Number |
Date |
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Parent |
994922 |
Dec 1992 |
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Continuations (1)
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Number |
Date |
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421485 |
Apr 1995 |
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