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US4013601A
Expired / Lapsed
US
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Water-dilutable polyamide resins and water-dilutable epoxy resin compositions containing said polyamide resins
Assignee: Westvaco Corp
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Filing: 1975-07-31
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Granted: 1977-03-22
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Expires: 1995-07-31
Abstract
Abstract There are disclosed herein water-dilutable reactive polyamide resins suitable for curing epoxy resins in aqueous systems. The polyamide resins are made by reacting together a C21-cycloaliphatic dicarboxylic acid of the formula <IMAGE> wherein x and y are integers from 3 to 9, x and y together equal 12, X is a member of the group consisting of H and COOH with one X of each moiety and a polyamine of the group diethylene triamine, triethylene tetramine and tetraethylene pentamine. These polyamide resins are soluble when water is added to the resin in amounts up to at least 45% by weight.
Inventors
- 👤 John A. Alford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:46
CPC Classifications
C; C08; C08L; C08L63/00; C08L77/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
106 words
A method of producing a water-dilutable reactive polyamide resin comprising; a. reacting a C 21 -cycloaliphatic dicarboxylic acid of the formula ##STR4## wherein x and y are integers from 3 to 9, x and y together equal 12, X is a member of the group consisting of H and COOH, with one X of each moiety and a polyamine selected from the group consisting of diethylene triamine, triethylene tetramine and tetraethylene pentamine to form a polyamide resin, said C 21 -cycloaliphatic dicarboxylic acid to polyamine being in a weight ratio from 1.5:1 to 3:1. and b. adding water up to about 55% to said polyamide resin.
Claim 2
Independent Claim
106 words
A method of producing a water-dilutable reactive polyamide resin comprising; a. reacting a C 21 -cycloaliphatic dicarboxylic acid of the formula ##STR4## wherein x and y are integers from 3 to 9, x and y together equal 12, X is a member of the group consisting of H and COOH, with one X of each moiety and a polyamine selected from the group consisting of diethylene triamine, triethylene tetramine and tetraethylene pentamine to form a polyamide resin, said C 21 -cycloaliphatic dicarboxylic acid to polyamine being in a weight ratio from 1.5:1 to 3:1. and b. adding water up to about 55% to said polyamide resin.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein from 0.25% to 25% by weight of an acid is added to said water-dilutable polyamide resin.
Claim 4
Dependent Claim
22 words
The method of claim 2 wherein from 1% to 10% by weight of acetic acid is added to said water-dilutable polyamide resin.
Claim 5
Dependent Claim
135 words
A water-dilutable coating composition comprising; a. 5-90% by weight of water as a solvent component, b. 5-40% by weight of an epoxy resin, c. 5-40% by weight of a polyamide resin produced by reacting a dibasic acid of the formula ##STR5## wherein x and y are integers from 3 to 9, x and y together equal 12, X is a member of the group consisting of H and COOH with one X of each moiety and a polyamine selected from the group consisting of diethylene triamine, triethylene tetramine and tetraethylene pentamine, said dibasic acid to polyamine being in a weight ratio from 1.5:1 to 3:1, d. said water being added to said polyamide resin to form a solution, and e. said polyamide resin solution being mixed with said epoxy resin to form a stable emulsion.
Claim 6
Dependent Claim
135 words
A water-dilutable coating composition comprising; a. 5-90% by weight of water as a solvent component, b. 5-40% by weight of an epoxy resin, c. 5-40% by weight of a polyamide resin produced by reacting a dibasic acid of the formula ##STR5## wherein x and y are integers from 3 to 9, x and y together equal 12, X is a member of the group consisting of H and COOH with one X of each moiety and a polyamine selected from the group consisting of diethylene triamine, triethylene tetramine and tetraethylene pentamine, said dibasic acid to polyamine being in a weight ratio from 1.5:1 to 3:1, d. said water being added to said polyamide resin to form a solution, and e. said polyamide resin solution being mixed with said epoxy resin to form a stable emulsion.
Claim 7
Dependent Claim
16 words
The water-dilutable coating composition of claim 4 wherein said epoxy resin is of the Bisphenol-A type.
Claim 8
Dependent Claim
22 words
The method of claim 4 wherein from 0.25% to 25% by weight of an acid is added to said polyamide resin solution.
Claim 9
Dependent Claim
22 words
The method of claim 4 wherein from 1% to 10% by weight of acetic acid is added to said water-dilutable polyamide resin.
Claim 10
Dependent Claim
26 words
The method of claim 1 wherein said water is added to said polyamide resin in an amount from 10% to 50% by weight of said 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) | 1980-03-21 | 1980-09-20 | 1981-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-21 | 1984-09-20 | 1985-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-21 | 1988-09-20 | 1989-03-22 | $7700.00 | Window Closed / Lapsed |