Claims
- 1. A polyamide resin obtained from the reaction of
- (A) an acid component substantially free of a polymeric fat acid comprised of a medium chain dicarboxylic acid of the formula HOOC--R.sub.1 --COOH where R.sub.1 is a divalent aliphatic hydrocarbon radical containing from 10-24 carbon atoms and
- (B) an amine component comprised of a diamine of the formula
- H.sub.2 N--R--NH.sub.2
- where R is a divalent aliphatic hydrocarbon radical having from 2-12 carbon atoms
- wherein the ratio of amine equivalents of said amine component to the carboxyl equivalents in said acid component is less than one so as to provide a resin having an acid value greater than 30 and the acid value exceeds the amine value by at least 20.
- 2. A polyamide resin as defined in claim 1 wherein the ratio of amine equivalents to carboxyl equivalents is less than about 0.9.
- 3. A polyamide resin as defined in claim 1 wherein the ratio of amine equivalents to carboxyl equivalents is in the range of about 0.50 to about 0.85.
- 4. A polyamide resin as defined in claim 1 wherein said acid component comprises
- (A) about X carboxyl equivalent percent of said medium chain dicarboxylic acid and
- (A') about Y carboxyl equivalent percent of a short chain dicarboxylic acid of the formula
- HOOC--(R.sub.2)n--COOH
- where R.sub.2 l is a divalent, aliphatic hydrocarbon chain having from 2-8 carbion atoms, n is an integer of 0 or 1, and wherein the ratio of carboxyl equivalents of said short chain acid to carboxyl equivalents of said medium chain acid is in the range of about 4:1 to about 0.66:1.
- 5. A polyamide resin as defined in claim 4 wherein said ratio of short chain to medium chain acid is in the range of 3:1 to 0.8:1.
- 6. A polyamide resin as defined in claim 4 wherein said medium chain dicarboxylic acid is 2-n-hexyl-5-(7-carboxyl-n-heptyl)-cyclohex-3-ene carboxylic acid, said short chain dicarboxylic acid is one in which n is 1 and R.sub.2 contains from 4-8 carbon atoms, and said diamine is selected from the group consisting of isophorone diamine and alkylene diamine wherein R has from 2-8 carbon atoms.
- 7. A polyamide resin as defined in claim 6 wherein said alkylene diamine is ethylene diamine.
- 8. A polyamide resin obtained from the reaction of
- (A) an acid component comprising
- (1) 20-100 carboxyl equivalent percent of a medium chain dicarboxylic acid of the formula
- HOOC--R.sub.1 --COOH
- where R.sub.1 is a divalent hydrocarbon radical containing from 10-24 carbon atoms;
- (2) 0-80 carboxyl equivalent percent of a short chain dicarboxylic acid of the formula
- HOOC(R.sub.2)n--COOH
- where R.sub.2 is a divalent, aliphatic hydrocarbon radical having from 2-8 carbon atoms and n is an integer of 0 or 1; and
- (3) 0-35 carboxyl equivalent percent of a monocarboxylic acid having the formula
- R.sub.3 COOH
- where R.sub.3 is an alkyl group having from 1-5 carbon atoms; with (B) an amine component comprising a diamine of the formula
- H.sub.2 N--R--NH.sub.2
- where R is a divalent, aliphatic hydrocarbon group having from 2-12 carbon atoms;
- wherein the ratio of amine equivalents of said amine component to the carboxyl equivalents of said acid component is less than 1 so as to provide a resin having an acid value greater than 30 and wherein the acid value exceeds the amine value by at least 20.
- 9. A polyamide resin as defined in claim 8 wherein the ratio of amine equivalents to carboxyl equivalents is less than about 0.9.
- 10. A polyamide resin as defined in claim 8 wherein ratio of amine equivalents to carboxyl equivalents is about 0.50-0.85.
- 11. A polyamide resin as defined in claim 10 wherein said medium chain dicarboxylic acid is 2-n-hexyl-5-(7-carboxyl-n-heptyl)-cyclohex-3-ene carboxylic acid.
- 12. A polyamide resin as defined in claim 10 wherein said diamine is isophorone diamine.
- 13. A polyamide resin as defined in claim 10 wherein said diamine is ethylene diamine.
- 14. A polyamide resin obtained on condensation of isophorone diamine and a mixture of acids
- (a) 2-n-hexyl-5-(7-carboxyl-n-heptyl)-cyclohex-3-ene carboxylic acid, and
- (b) a short chain dicarboxylic acid selected from the group consisting of adipic and azelaic acid
- wherein the ratio amine equivalents to carboxyl equivalents is in the range of about 0.50-0.85, so as to provide a resin having an acid value greater than 30.
- 15. A polyamide as defined in claim 14 wherein the equivalents ratio of said short chain dicarboxylic acid (b) to acid (a) is 1:1 to 3:1.
- 16. A polyamide resin obtained by the condensation of ethylene diamine and a mixture of acids
- (a) 2-n-hexyl-5-(7-carboxyl-n-heptyl)-cyclohex-3-ene carboxylic acid, and
- (b) propionic acid
- wherein the ratio of amine equivalents to carboxyl equivalents is in the range of about 0.50-0.85 so as to provide a resin having an acid value greater than 30, and the equivalent rato of acid (a) to acid (b) is about 3:1.
- 17. A solution of the polyamide resin of claim 1 in an aqueous solvent containing an organic amine.
- 18. A solution as defined in claim 17 wherein said aqueous solvent contains said organic amine in an amount than about 5% of the aqueous solvent.
- 19. A flexographic/gravure ink composition comprised of the solution of claim 17 and a flexographic/gravure ink pigment.
- 20. A flexographic/gravure ink composition in accordance with claim 19 wherein the aqueous solvent contains an organic amine in an amount greater than about 5% by weight of the aqueous solvent.
FIELD OF THE INVENTION
This application is a continuation-in-part application of our co-pending application Ser. No. 701,903 filed Feb. 15, 1985, now abandoned.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
3776865 |
Glaser et al. |
Dec 1973 |
|
3781234 |
Drawert et al. |
Dec 1973 |
|
4051087 |
Scoggins et al. |
Sep 1977 |
|
4055525 |
Cheng |
Oct 1977 |
|
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
701903 |
Feb 1985 |
|