US4539347A
Expired / Lapsed
US
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Novolac based epoxy resin curing agents for use in aqueous systems
Assignee: Resolution Performance Products LLC
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Filing: 1984-09-20
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Granted: 1985-09-03
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Expires: 2004-09-20
Abstract
Abstract The instant invention is an epoxy resin curing agent based upon an epoxy novolac containing, on the average, between about 3 and about 7.5 epoxy groups per molecule, in which substantially all of the epoxide groups are reacted with a polyamine wherein each primary amine hydrogen in the resulting reaction product is further reacted with a monoepoxide or a monocarboxylic acid. The resulting epoxy resin curing agent may be used in a water based system for curing epoxide resins. The curing agent is rendered water soluble or water dispersible by salting with a conventional volatile monocarboxylic acid such as acetic, formic or propionic acid.
Inventors
- 👤 William J. DeGooyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:42
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/182; C08G59/184
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
65 words
A novolac based epoxy resin curing agent comprising a volatile acid salt of the reaction product of an epoxy novolac compound and a primary amine containing polyamine wherein substantially all of the epoxy groups are reacted with the polyamine and wherein substantially at least all of the unreacted primary amine groups in the polyamine/epoxide reaction product are reacted with a monoepoxide or a monocarboxylic acid.
Claim 2
Dependent Claim
65 words
A novolac based epoxy resin curing agent comprising a volatile acid salt of the reaction product of an epoxy novolac compound and a primary amine containing polyamine wherein substantially all of the epoxy groups are reacted with the polyamine and wherein substantially at least all of the unreacted primary amine groups in the polyamine/epoxide reaction product are reacted with a monoepoxide or a monocarboxylic acid.
Claim 3
Dependent Claim
40 words
The curing agent of claim 1 wherein, the epoxy novolac is prepared by epoxidizing the reaction product of a phenol and formaldehyde to produce an epoxy containing product having, on the average, about 3 to 7.5 epoxide groups per molecule.
Claim 4
Dependent Claim
14 words
The curing agent of claim 1 wherein the novolac is a phenol/formaldehyde based novolac.
Claim 5
Dependent Claim
16 words
The curing agent of this claim 3 wherein the phenol is at least in part bisphenol-A.
Claim 6
Dependent Claim
17 words
The curing agent of claim 1 wherein the novolac is based at least in part on glyoxal.
Claim 7
Dependent Claim
12 words
The curing agent of claim 1 wherein the polyamine is a polyalkylenepolyamine.
Claim 8
Dependent Claim
33 words
The curing agent of claim 1 wherein the polyamine has the formula: ##STR2## wherein n is 0 to 4 and R is an alkylene or arylene group containing 2 to 8 carbon atoms.
Claim 9
Dependent Claim
20 words
The curing agent of claims 6 or 7 wherein the amine is selected from diethylenetriamine, triethylenetetramine, tetraethylenepentamine and meta-xylylene diamine.
Claim 10
Dependent Claim
13 words
The curing agent of claim 1 wherein the monoepoxide is an aromatic monoepoxide.
Claim 11
Dependent Claim
18 words
The curing agent of claim 1 wherein the monoepoxide is cresyl monoglycidyl ether or cashew nut oil monoepoxide.
Claim 12
Dependent Claim
28 words
The curing agent of claim 1 wherein the monocarboxylic acid is a C 4 -C 22 unsaturated monocarboxylic acid or a C 5 -C 11 saturated monocarboxylic acid.
Claim 13
Dependent Claim
21 words
The curing agent of claim 11 wherein the monocarboxylic acid is selected from pelaragonic acid and drying oil based fatty acids.
Claim 14
Dependent Claim
24 words
The curing agent of claim 1 wherein the volatile acid is selected from the group consisting of formic acid, acetic acid and propionic acid.
Claim 15
Dependent Claim
23 words
An ambient temperature curable coating composition comprising an aqueous solution or dispersion of the composition of claim 1 in admixture with a polyepoxide.
Claim 16
Dependent Claim
15 words
The composition of claim 14 wherein the polyepoxide is a polygycidyl ether of dihydric phenol.
Claim 17
Dependent Claim
11 words
The composition of claim 15 wherein the dihydric phenol is bisphenol-A.
Claim 18
Dependent Claim
19 words
The composition of claim 14 wherein the polyepoxide has a weight per epoxide of no greater than about 1000.
Claim 19
Dependent Claim
19 words
The composition of claim 17 wherein the polyepoxide has a weight per epoxide of about 180 to about 700.
Claim 20
Dependent Claim
37 words
The composition of claim 14 wherein the ratio of the epoxy groups in the polyepoxide to reactive amine hydrogen groups in the curing agent is in the range of 0.5 to 1.0 to about 1.5 to 1.0.
Claim 21
Dependent Claim
10 words
The composition of claim 14 in admixture with a co-solvent.
Claim 22
Dependent Claim
12 words
The composition of claim 20 wherein the co-solvent is an oxygenated solvent.
Claim 23
Dependent Claim
13 words
The composition of claim 21 wherein the co-solvent is a glycol based ether.
References Cited (Backward Citations)
US3374186A
Cited
US3957709A
Cited
US4111900A
Cited
US4093594A
Cited
US4166900A
Cited
US4246148A
Cited
EP0047909A1
Cited
US4316003A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-02 | 1997-03-04 | 1997-09-03 | $7700.00 | Window Closed / Lapsed |