US4237242A
Expired / Lapsed
US
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Uses of chelated metal catalysts for acid/epoxy polymer systems
Assignee: Rohm and Haas Co
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Filing: 1978-07-26
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Granted: 1980-12-02
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Expires: 1998-07-26
Abstract
Abstract This application discloses a composition and a method for catalyzing and crosslinking of a polyepoxy compound and an acrylic resin containing carboxylic acid groups, the catalyst being in the form of a metal chelate, particularly of manganese, zinc or chromium. The compositions, when substantially freed of volatile solvent and adjusted to a viscosity resembling that of gunnable caulking compositions, are particularly well adapted as a replacement for the metallic body solder used in automobile manufacture to fill out imperfections, welded joints and the like, when applied thereto and cured.
Inventors
- 👤 Lawrence S. Frankel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:32
CPC Classifications
C; C08; C08L; C08L57/00; C08L57/04; C08G; C08G59/00; C08G59/18; C08G59/68; C08G59/70; C08L63/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49718; Y10T29/49746; Y10T428/00; Y10T428/20; Y10T428/31504; Y10T428/31511; Y10T428/31529
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
142 words
A composition comprising a linear addition copolymer, derived from a monomer mixture containing from 5 to 45% by weight of one or more, -ethylenically unsaturated carboxylic acids, the T g of the copolymer being from -45° C. to 20° C., the copolymer being capable of forming a thermoset resin by reaction with a resin-forming epoxy compound containing a plurality of epoxide groups, and a catalyst in the amount of 0.04% to 10% by weight based on the weight of the addition copolymer, the catalyst being a transition metal chelate stable at ambient temperatures up to about 22° C. and which decomposes to release the chelated metal when heated to temperatures of about 100° C., any quantity of organic solvent present being from 0% to 10% of the combined weight of copolymer and solvent, and which composition contains a resin-forming a polyepoxy compound.
Claim 2
Dependent Claim
142 words
A composition comprising a linear addition copolymer, derived from a monomer mixture containing from 5 to 45% by weight of one or more, -ethylenically unsaturated carboxylic acids, the T g of the copolymer being from -45° C. to 20° C., the copolymer being capable of forming a thermoset resin by reaction with a resin-forming epoxy compound containing a plurality of epoxide groups, and a catalyst in the amount of 0.04% to 10% by weight based on the weight of the addition copolymer, the catalyst being a transition metal chelate stable at ambient temperatures up to about 22° C. and which decomposes to release the chelated metal when heated to temperatures of about 100° C., any quantity of organic solvent present being from 0% to 10% of the combined weight of copolymer and solvent, and which composition contains a resin-forming a polyepoxy compound.
Claim 3
Dependent Claim
91 words
The composition of claim 1 in which the acid is acrylic acid, methacrylic acid or itaconic acid and a predominant proportion of the monomer in the copolymer is at least one ester of acrylic or methacrylic acid and a saturated monohydric aliphatic alcohol having 1 to 18 carbon atoms, said addition copolymer having a number average molecular weight of between 1,000 and 10,000, said composition being substantially free of volatile solvent, having the viscosity of a gunnable caulking composition, and having a ratio of pigment to binder of 0.4 to 1.
Claim 4
Dependent Claim
28 words
The composition of claim 2 wherein the copolymer is derived from a monomer mixture containing from 3 to 15% by weight of at least one dicarboxylic acid anhydride.
Claim 5
Dependent Claim
96 words
The composition of claim 3 in which the monomer mixture comprises maleic ahydride, and a predominant proportion of the monomers in the copolymer is at least one ester of acrylic acid or methacrylic acid and a saturated monohydric aliphatic alcohol having 1 to 18 carbon atoms, said addition copolymer having a T g of between -45° and +20° C., a number average molecular weight of between 1,000 and 10,000 said composition being substantially free of volatile solvent, having a viscosity of gunnable caulking compositions, and having a ratio of pigment to binder of 0.4 to 1.
Claim 6
Dependent Claim
15 words
The composition of claim 1 in which no more than 5% volatile solvent is present.
Claim 7
Dependent Claim
25 words
The composition of claim 2 in which the epoxy compound is an epoxy in the form of a glycidyl ether of a polyphenol epoxy resin.
Claim 8
Dependent Claim
17 words
The composition of claim 6 wherein the epoxy resin is a liquid or solid bisphenol-A-diglycidyl ether resin.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-02 | 1984-06-02 | 1984-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-02 | 1988-06-02 | 1988-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-02 | 1992-06-02 | 1992-12-02 | $7700.00 | Window Closed / Lapsed |