US5141983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous coating composition
Assignee: DIC Corp
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Filing: 1991-12-17
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Granted: 1992-08-25
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Expires: 2011-12-17
Abstract
Abstract An aqueous coating composition comprising, as essential components, an aqueous polyurethane resin (A) obtained by reacting a diisocyanate and glycols containing a carboxylic acid group-containing glycol to prepare an urethane prepolymer, neutralizing the urethane prepolymer and subjecting the neutralized urethane prepolymer to chain extension with a hydrazine derivative, and an aqueous dispersion (B) of an acrylic copolymer whose constituent monomers contain carbonyl group-containing monomer or an amido group-containing monomer in an amount of at least 0.5 part by weight per 100 parts by weight of total polymerizable monomers, wherein the weight ratio in terms of solid content, of the aqueous polyurethane resin (A) and the aqueous dispersion (B) of an acrylic copolymer is 100/5 to 5/100, and an aqueous coating composition obtained by, in the presence of the above aqueous polyurethane resin (A), polymerizing radical-polymerizable acrylic monomers (C) containing a carbonyl group-containing monomer or an amido group-containing monomer in an amount of at least 0.5 part by weight per 100 parts by weight of total polymerizable monomers, in such proportions that the weight ratio in terms of solid content, of the aqueous polyurethane resin (A) and the radical-polymerizable acrylic monomers (C) is 100/5 to 5/100.
Inventors
- 👤 Yoshiki Hasegawa
- 👤 Fumio Yoshino
- 👤 Shinichi Yoshioka
- 👤 Kiyoshi Ohnishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:27
CPC Classifications
C; C09; C09D; C09D151/00; C09D151/08; C09D175/00; C09D175/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
186 words
An aqueous coating composition comprising, as essential components, an aqueous polyurethane resin (A) obtained by reacting a diisocyanate and glycols containing a carboxylic acid group-containing glycol to prepare a urethane prepolymer, neutralizing the urethane prepolymer and subjecting the neutralizing the urethane prepolymer and subjecting the neutralized urethane prepolymer to chain extension with a hydrazine derivative, and an aqueous dispersion (B) of an acrylic copolymer whose constituent monomers contain a carbonyl group-containing monomer or an amido group-containing monomer in an amount of at least 0.5 part by weight per 100 parts by weight of total polymerizable monomers, wherein the weight ratio in terms of solid content, of the aqueous polyurethane resin (A) and the aqueous dispersion (B) of an acrylic copolymer is 100/5 to 5/100, whereby when a film is obtained by coating the composition on a substrate and the coating allowed to dry a bond forms between the hydrazine terminal groups of the polyurethane resin and the carbonyl group or amido group of the acrylic copolymer, thereby forming a film of improved solvent resistance while retaining the properties of the polyurethane resin and the acrylic copolymer.
Claim 2
Dependent Claim
186 words
An aqueous coating composition comprising, as essential components, an aqueous polyurethane resin (A) obtained by reacting a diisocyanate and glycols containing a carboxylic acid group-containing glycol to prepare a urethane prepolymer, neutralizing the urethane prepolymer and subjecting the neutralizing the urethane prepolymer and subjecting the neutralized urethane prepolymer to chain extension with a hydrazine derivative, and an aqueous dispersion (B) of an acrylic copolymer whose constituent monomers contain a carbonyl group-containing monomer or an amido group-containing monomer in an amount of at least 0.5 part by weight per 100 parts by weight of total polymerizable monomers, wherein the weight ratio in terms of solid content, of the aqueous polyurethane resin (A) and the aqueous dispersion (B) of an acrylic copolymer is 100/5 to 5/100, whereby when a film is obtained by coating the composition on a substrate and the coating allowed to dry a bond forms between the hydrazine terminal groups of the polyurethane resin and the carbonyl group or amido group of the acrylic copolymer, thereby forming a film of improved solvent resistance while retaining the properties of the polyurethane resin and the acrylic copolymer.
Claim 3
Dependent Claim
168 words
An aqueous coating composition obtained by polymerizing radical-polymerizable acrylic monomers (C) containing a carbonyl group-containing monomer or an amido group-containing monomer in an amount of at least 0.5 part by weight per 100 parts by weight of total polymerizable monomers, in the presence of an aqueous polyurethane resin (A) obtained by reacting a diisocyanate and glycols containing a carboxylic acid group-containing glycol to prepare a urethane prepolymer, neutralizing the urethane prepolymer and subjecting the neutralized urethane prepolymer to chain extension with a hydrazine derivative, in such proportions that the weight ratio in terms of solid content, of the aqueous polyurethane resin (A) and the radical-polymerizable acrylic monomers (C) is 100/5 to 5/100 whereby, when a film is obtained by coating said composition on a substrate and the coating allowed to dry a bond forms between the acrylic monomers (C) and the hydrazine terminal groups of the polyurethane resin thereby forming a film of improved solvent resistance which retains the properties of the polyurethane resin and the acrylic resin.
Claim 4
Dependent Claim
168 words
An aqueous coating composition obtained by polymerizing radical-polymerizable acrylic monomers (C) containing a carbonyl group-containing monomer or an amido group-containing monomer in an amount of at least 0.5 part by weight per 100 parts by weight of total polymerizable monomers, in the presence of an aqueous polyurethane resin (A) obtained by reacting a diisocyanate and glycols containing a carboxylic acid group-containing glycol to prepare a urethane prepolymer, neutralizing the urethane prepolymer and subjecting the neutralized urethane prepolymer to chain extension with a hydrazine derivative, in such proportions that the weight ratio in terms of solid content, of the aqueous polyurethane resin (A) and the radical-polymerizable acrylic monomers (C) is 100/5 to 5/100 whereby, when a film is obtained by coating said composition on a substrate and the coating allowed to dry a bond forms between the acrylic monomers (C) and the hydrazine terminal groups of the polyurethane resin thereby forming a film of improved solvent resistance which retains the properties of the polyurethane resin and the acrylic resin.
Claim 5
Dependent Claim
34 words
The aqueous coating composition of claim 1, wherein the aqueous polyurethane resin (A) is obtained by reacting a diisocyanate and glycols containing, as essential components, a carboxylic acid group-containing glycol and a polyester polyol.
Claim 6
Dependent Claim
29 words
The aqueous coating composition of claim 1 or 2, wherein the hydrazine derivative is at least one compound selected from the group consisting of hydrazine, ethylene-1,2-dihydrazine, propylene-1,3-dihydrazine and butylene-1,4-dihydrazine.
Claim 7
Dependent Claim
45 words
The aqueous coating composition of claim 1 or 2, wherein the carbonyl group-containing monomer is used and is at least one compound selected from the group consisting of acrolein, diacetone acrylamide, vinyl methyl ketone, vinyl ethyl ketone, vinyl butyl ketone, diacetone acrylate and acetonitrile acrylate.
Claim 8
Dependent Claim
50 words
The aqueous coating composition of claim 1 or 2, wherein the amido group-containing monomer is used and is at least one compound selected from the group consisting of acrylamide, methacrylamide, itaconic acid monoamide, itaconic acid diamide, maleic acid monoamide, maleic acid diamide, N-methylacrylamide, N-isobutylacrylamide, N-methylmethacrylamide, N-methylolacrylamide, N-ethoxymethylacrylamide, N-n-butoxymethylacrylamide and N-isopropoxymethacrylamide.
Claim 9
Dependent Claim
26 words
The aqueous coating composition of claims 1 or 2, wherein the aqueous polyurethane resin (A) has an acid value of 10-200 per resin (A) solid content.
Claim 10
Dependent Claim
39 words
The aqueous coating composition of claim 1 or 2 wherein the carbonyl group-containing monomer, amido group-containing monomer, or mixture thereof is used in an amount of 1.0-10.0 parts by weight per 100 parts by weight of total polymerizable monomers.
Claim 11
Dependent Claim
32 words
The composition of claim 1 wherein the weight ratio, in terms of solid content, of the aqueous polyurethane resin and the aqueous dispersion of the acrylic copolymer is from 100/10 to 10/100.
Claim 12
Dependent Claim
29 words
The composition of claim 2 wherein the weight ratio in terms of solid content, of the aqueous polyurethane resin and the radical-polymrizable acrylic monomers is from 100/10 to 10/100.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-08-25 | 1996-02-24 | 1996-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-25 | 2000-02-24 | 2000-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-25 | 2004-02-24 | 2004-08-25 | $7700.00 | Window Closed / Lapsed |