Patent CH220744A successfully refreshed from Google Patents.
US4497946A
Expired / Lapsed
US
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Epoxy phosphate-carboxyl copolymers and aqueous coatings containing the same
Assignee: DeSoto Inc
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Filing: 1983-04-13
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Granted: 1985-02-05
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Expires: 2003-04-13
Abstract
Abstract Epoxy phosphate-carboxyl copolymers substantially free of epoxy functionality and aqueous coatings containing the same are disclosed. These copolymers are formed by copolymerizing monoethylenically unsaturated monomers, including carboxyl-functional monomer, in an organic solvent solution containing an epoxy-functional epoxy phosphate, there being at least 5% of carboxyl-functional monomer and at least 10% of total monomers present in the copolymer. The copolymer is converted into a water soluble salt with volatile amine and phenoplast resins are preferably used to provide at least part of the curing agent.
Inventors
- 👤 Kazys Sekmakas
- 👤 Raj Shah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:35
CPC Classifications
C; C08; C08F; C08F299/00; C08F299/02; C08F299/026; C08F299/028
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
48 words
An epoxy phosphate-carboxyl copolymer substantially free of epoxy functionality and formed by copolymerizing monoethylenically unsaturated monomers, including carboxyl-functional monomer, in an organic solvent solution containing an epoxy-functional epoxy phosphate, there being at least 5% of carboxyl-functional monomer and at least 10% of total monomer present in the copolymer.
Claim 2
Dependent Claim
48 words
An epoxy phosphate-carboxyl copolymer substantially free of epoxy functionality and formed by copolymerizing monoethylenically unsaturated monomers, including carboxyl-functional monomer, in an organic solvent solution containing an epoxy-functional epoxy phosphate, there being at least 5% of carboxyl-functional monomer and at least 10% of total monomer present in the copolymer.
Claim 3
Dependent Claim
67 words
An epoxy phosphate copolymer as recited in claim 1 in which said epoxy phosphate is an epoxy-functional ester of ortho phosphoric acid with a diglycidyl ether of a bisphenol having an average molecular weight of from 500 to 5000 and a 1,2-epoxy equivalency in the range of 1.3-2.0, said ester containing from 0.05 mol to 1.0 mol of phosphoric acid per epoxide equivalent in said diglycidyl ether.
Claim 4
Dependent Claim
40 words
An epoxy phosphate copolymer as recited in claim 2 in which said monomers are used in a total amount of up to 100% of the weight of the epoxy ester, and the copolymerization is carried out in water-miscible organic solvent.
Claim 5
Dependent Claim
47 words
An epoxy phosphate copolymer as recited in claim 2 in which ortho phosphoric acid is used in an amount of from 0.1 to 0.3 mol per epoxide equivalent and said diglycidyl ether is an ether of bisphenol A having an average molecular weight of at least 1000.
Claim 6
Dependent Claim
14 words
A water soluble amine salt of the epoxy phosphate copolymer recited in claim 1.
Claim 7
Dependent Claim
12 words
An aqueous dispersion of the water soluble amine salt of claim 5.
Claim 8
Dependent Claim
14 words
A water soluble amine salt of the epoxy phosphate copolymer recited in claim 4.
Claim 9
Dependent Claim
12 words
An aqueous dispersion of the water soluble amine salt of claim 7.
Claim 10
Dependent Claim
33 words
An aqueous dispersion as recited in claim 6 in which there is present from 5% to 50% of total nonvolatile resin solids of a curing agent selected from aminoplast resin and phenoplast resin.
Claim 11
Dependent Claim
45 words
An aqueous dispersion as recited in claim 8 in which there is present from 5% to 50% of total nonvolatile resin solids of a curing agent selected from aminoplast resin and phenoplast resin, and up to 30% of total nonovolatile resin solids is phenoplast resin.
Claim 12
Dependent Claim
29 words
An aqueous dispersion as recited in claim 10 in which said phenoplast resin is a water insoluble heat-hardening formaldehyde condensate dispersed in the water medium by said copolymer salt.
Claim 13
Dependent Claim
21 words
An aqueous dispersion as recited in claim 11 in which said phenoplast resin contains about equimolar proportions of cresol and formaldehyde.
Claim 14
Dependent Claim
114 words
An epoxy phosphate-carboxyl copolymer substantially free of epoxy functionality and formed by copolymerizing monoethylenically unsaturated monomers, including carboxyl-functional monomer, in water-miscible organic solvent solution containing an epoxy-functional epoxy phosphate in which a diglycidyl ether of a bisphenol having an average molecular weight of from 500 to 5000 and a 1,2-epoxy equivalency in the range of 1.3-2.0 is esterfied with from 0.1 to 0.3 mol of ortho phosphoric acid per epoxide equivalent in said diglycidyl ether, there being at least 5% of carboxyl-functional monomer and from 10% to 100% of total monomer present in the copolymer, based on the weight of the epoxy phosphate, to provide a copolymer acid number of from 30 to 120.
Claim 15
Dependent Claim
114 words
An epoxy phosphate-carboxyl copolymer substantially free of epoxy functionality and formed by copolymerizing monoethylenically unsaturated monomers, including carboxyl-functional monomer, in water-miscible organic solvent solution containing an epoxy-functional epoxy phosphate in which a diglycidyl ether of a bisphenol having an average molecular weight of from 500 to 5000 and a 1,2-epoxy equivalency in the range of 1.3-2.0 is esterfied with from 0.1 to 0.3 mol of ortho phosphoric acid per epoxide equivalent in said diglycidyl ether, there being at least 5% of carboxyl-functional monomer and from 10% to 100% of total monomer present in the copolymer, based on the weight of the epoxy phosphate, to provide a copolymer acid number of from 30 to 120.
Claim 16
Dependent Claim
20 words
An epoxy phosphate copolymer as recited in claim 13 in which the copolymer acid number is from 50 to 90.
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) | 1988-02-05 | 1988-08-06 | 1989-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-05 | 1992-08-06 | 1993-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-05 | 1996-08-06 | 1997-02-05 | $7700.00 | Window Closed / Lapsed |