US4067838A
Expired / Lapsed
US
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Chelate-forming aqueous resin composition
Assignee: Dai Nippon Toryo Co Ltd
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Filing: 1976-02-12
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Granted: 1978-01-10
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Expires: 1996-02-12
Abstract
Abstract A chelate-forming two-pack type aqueous resin composition comprising (i) an aqueous dispersion of a resin containing in the molecule at least 2 epoxy groups and (ii) a reaction product formed between an amino curing agent containing in the molecule at least 2 nitrogen atoms and active hydrogen atoms bonded thereto and protocatechuic acid and/or gallic acid is disclosed.
Inventors
- 👤 Masaaki Hayashi
- 👤 Kazuyoshi Tsuneta
- 👤 Hiroharu Sasaki
- 👤 Hiroshi Takada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:02
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/56; C08G59/58; C08G59/5093
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
69 words
A two-pack type aqueous resin composition having a chelate-forming capacity, which comprises 1. an aqueous dispersion of a resing having in the molecule at least two epoxy groups, and 2. a reaction product formed between an amino curing agent having in the molecule at least two nitrogen atoms and active hydrogen atoms bonded thereto and 5-30% by weight based on the curing agent of protocatechuic acid and/or gallic acid.
Claim 2
Dependent Claim
69 words
A two-pack type aqueous resin composition having a chelate-forming capacity, which comprises 1. an aqueous dispersion of a resing having in the molecule at least two epoxy groups, and 2. a reaction product formed between an amino curing agent having in the molecule at least two nitrogen atoms and active hydrogen atoms bonded thereto and 5-30% by weight based on the curing agent of protocatechuic acid and/or gallic acid.
Claim 3
Dependent Claim
39 words
An aqueous resin composition as set forth in claim 1 wherein said reaction product is obtained by reacting the amino curing agent with 10 to 25% by weight, based on the curing agent, of protocatechuic acid and/or gallic acid.
Claim 4
Dependent Claim
26 words
An aqueous resin composition as set forth in claim 1 wherein the resin having in the molecule at least 2 epoxy groups is an epoxy resin.
Claim 5
Dependent Claim
36 words
An aqueous resin composition as set forth in claim 3 wherein the epoxy resin is at least one member selected from the group consisting of bis-phenol epoxy resins, novolak type epoxy resins and polyglycol epoxy resins.
Claim 6
Dependent Claim
40 words
An aqueous resin composition as set forth in claim 1 wherein the resin having in the molecule at least 2 epoxy groups is a copolymer of an epoxy group-containing α,β-ethylenically unsaturated monomer with other α, β-ethylenically unsaturated monomer copolymerizable therewith.
Claim 7
Dependent Claim
48 words
An aqueous resin composition as set forth in claim 5 wherein the epoxy group-containing α, β-ethylenically unsaturated monomer is used in an amount of 5 to 30% by weight and another α, β-ethylenically unsaturated monomer copolymericable therewith is used in an amount of 95 to 70% by weight.
Claim 8
Dependent Claim
30 words
An aqueous resin composition as set forth in claim 1 wherein tannic acid is further incorporated in an amount of 2 to 30% by weight based on the reaction product.
Claim 9
Dependent Claim
46 words
An aqueous resin composition as set forth in claim 1 wherein the resin having in the molecule at least 2 epoxy groups is mixed with the reaction product so that the ratio of epoxy groups/active hydrogen atoms is within a range of from 178 to 2/1.
Claim 10
Dependent Claim
48 words
An aqueous resin composition as set forth in claim 1 wherein the amino curing agent having in the molecule at least 2 nitrogen atoms and active hydrogen atoms bonded thereto is at least one member selected from the group consisting of amine adduct resins and polyamide resins polyamines.
Claim 11
Dependent Claim
29 words
The composition according to claim 9 wherein the resin is a bis-phenol epoxy resin and the amino curing agent is a polyamide resin which is reacted with gallic acid.
Claim 12
Dependent Claim
28 words
The composition according to claim 9 wherein the resin is a polyglycol epoxy resin and the amino curing agent is a polyamide which is reacted with gallic acid.
Claim 13
Dependent Claim
29 words
The composition according to claim 9 wherein the resin is a bis-phenol epoxy resin and the amino curing agent is a polyamide resin which is reacted with gallic acid.
Claim 14
Dependent Claim
38 words
The composition according to claim 1 wherein said resin having in the molecule at least two epoxy groups is emulsified in water with an anionic surface active agent or a non-ionic surface active agent or a mixture thereof.
Claim 15
Dependent Claim
36 words
The composition according to claim 1 wherein said epoxy resin is solid at room temperature and a monoepoxy compound in the amount up to 20% by weight of said resin is added to said epoxy resin.
Claim 16
Dependent Claim
58 words
The composition according to claim 1 wherein a resin which is a melamine resin, a urea resin, a phenolic resin, a polybutadiene, an alkyd resin or a polyester resin is added to said resin containing at least two epoxy groups, in an amount up to 20% by weight of said resin which has at least two epoxy groups.
References Cited (Backward Citations)
US3390124A
Cited
US3847849A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |