US4085161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodeposition of aqueous dispersions of copolymers of polyethylenically unsaturated epoxy adducts including blocked isocyanate monomer
Assignee: DeSoto Inc
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Filing: 1976-11-01
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Granted: 1978-04-18
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Expires: 1996-11-01
Abstract
Abstract Nongelled, amine-functional copolymers dispersible in water with the aid of a solubilizing acid are provided by copolymerizing: (A) an ethylenically unsaturated hydroxy-functional adduct of a diepoxide having from about 1.2 to about 2.0 epoxy groups per molecule, said epoxy groups being replaced by ethylenically unsaturated groups; (B) copolymerizable monoethylenically unsaturated monomers including amine-functional monomer; and (C) a blocked ethylenically unsaturated isocyanate which preferably includes a plurality of alcohol-blocked isocyanate groups. The amine-functional polymers can be dispersed in water at a pH close to neutral, and they are particularly useful to enable corrosion-resistant coatings to be electrodeposited at the cathode and cured at a lower than usual baking temperature.
Inventors
- 👤 Kazys Sekmakas
- 👤 Raj Shah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:09
CPC Classifications
C; C08; C08F; C08F299/00; C08F299/02; C08F299/026
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
147 words
Nongelled, amine-functional copolymers dispersible in water with the aid of a solubilizing acid constituted by a copolymer of (A) 5% - 75% of an ethylenically unsaturated hydroxy-functional adduct of a diepoxide having the formula ##STR5## in which R is a copolymerizable ethylenically unsaturated organic radical, Y is the residue of a substituent selected from hydroxy and primary amine, and Z has the structure of a diepoxide having an average molecular weight of at least about 350 and in which the epoxy groups are replaced by the OH groups shown in the formula; (B) copolymerizable monoethylenically unsaturated monomers including 2% - 30% of tertiary amine-functional monomer; and (C) 2% - 50% of a blocked monoethylenically unsaturated derivative of a polyisocyanate in which all of the isocyanate groups are blocked except for one which carries the single unsaturated group, said proportions being based on the weight of the copolymer.
Claim 2
Dependent Claim
147 words
Nongelled, amine-functional copolymers dispersible in water with the aid of a solubilizing acid constituted by a copolymer of (A) 5% - 75% of an ethylenically unsaturated hydroxy-functional adduct of a diepoxide having the formula ##STR5## in which R is a copolymerizable ethylenically unsaturated organic radical, Y is the residue of a substituent selected from hydroxy and primary amine, and Z has the structure of a diepoxide having an average molecular weight of at least about 350 and in which the epoxy groups are replaced by the OH groups shown in the formula; (B) copolymerizable monoethylenically unsaturated monomers including 2% - 30% of tertiary amine-functional monomer; and (C) 2% - 50% of a blocked monoethylenically unsaturated derivative of a polyisocyanate in which all of the isocyanate groups are blocked except for one which carries the single unsaturated group, said proportions being based on the weight of the copolymer.
Claim 3
Dependent Claim
16 words
Amine-functional copolymers as recited in claim 1 in which said amine-functional monomer is a tertiary amine.
Claim 4
Dependent Claim
20 words
Amine-functional copolymers as recited in claim 1 in which said blocked ethylenically unsaturated polyisocyanate is blocked with a volatile alcohol.
Claim 5
Dependent Claim
32 words
Amine-functional copolymers as recited in claim 1 in which said diepoxide is a diglycidyl ether of a bisphenol having an average molecular weight in the range of about 500 to about 6000.
Claim 6
Dependent Claim
21 words
Amine-functional copolymers as recited in claim 4 in which said diglycidyl ether of a bisphenol is reacted with soya fatty amine.
Claim 7
Dependent Claim
20 words
Amine-functional copolymers as recited in claim 4 in which said diglycidyl ether of a bisphenol is reacted with oleyl alcohol.
Claim 8
Dependent Claim
62 words
Amine-functional copolymers as recited in claim 1 in which said blocked polyisocyanate is an alcohol-blocked reaction product of one mol of a copolymerizable ethylenically unsaturated alcohol with one mol of an organic polyisocyanate containing a plurality of aromatic isocyanate groups and a single aliphatic isocyanate group, all of the remaining isocyanate groups in said reaction product being blocked with a volatile alcohol.
Claim 9
Dependent Claim
16 words
Amine-functional copolymers as recited in claim 7 in which said blocked isocyanate has the formula: ##STR6##
Claim 10
Dependent Claim
18 words
Amine-functional copolymers as recited in claim 1 in which said monoethylenically unsaturated tertiary amine is an amino amide.
Claim 11
Dependent Claim
38 words
A stable aqueous dispersion of the amine functional copolymers defined in claim 1 dispersed with the aid of water-miscible organic solvent and a solubilizing acid, said dispersion having a pH in the range of pH 5.0 - 7.5.
Claim 12
Dependent Claim
44 words
A stable aqueous dispersion as recited in claim 10 in which said solvent is present in an amount of from 30% - 125% of the weight of the copolymers and said dispersion has a resin solids content of from 2 - 20% by weight.
Claim 13
Dependent Claim
22 words
Amine-functional copolymers as recited in claim 11 in which said dispersion has a pH in the range of pH 6.0 - 7.0.
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) | 1981-04-17 | 1981-10-17 | 1982-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-17 | 1985-10-17 | 1986-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-17 | 1989-10-17 | 1990-04-18 | $7700.00 | Window Closed / Lapsed |