Patent US4291137A successfully refreshed from Google Patents.
US4291137A
Expired / Lapsed
US
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One-pack high solid coating composition
Assignee: Kansai Paint Co Ltd
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Filing: 1979-08-31
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Granted: 1981-09-22
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Expires: 1999-08-31
Abstract
Abstract A one-pack high solid coating composition consisting essentially of (I) 100 parts by weight of an acrylic resin which is a copolymer having a glass transition temperature of -21° to -50° C. and a hydroxyl number of 40 to 280 and being prepared from (a) one or more members selected from hydroxyalkyl acrylates and methacrylates of the general formula ##STR1## wherein R is a hydrogen atom or a methyl group and R 1 is a divalent alkyl group having 2 to 5 carbon atoms, and (b) one or more members selected from alkyl acrylates and methacrylates of the general formula ##STR2## wherein R is as defined above and R 2 is a monovalent alkyl group having 1 to 12 carbon atoms, and glycidyl acrylates and methacrylates of the general formula ##STR3## wherein R is as defined above and R 3 is a divalent alkyl group having 1 to 5 carbon atoms, (II) 20 to 160 parts by weight of an amino-formaldehyde resin etherified with a monohydric alcohol having 1 to 4 carbon atoms, and (III) 0.5 to 6 parts by weight, per 100 parts by weight of the total of the acrylic resin as component (I) and the etherified amino-formaldehyde resin as component (II) combined, of a blocked acid catalyst, said amount of the blocked acid catalyst being expressed in the amount of its acid.
Inventors
- 👤 Yasushi Nakate
- 👤 Hiroshi Iwai
- 👤 Kiyoshi Nanishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:00
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/40; C08G12/42; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C09D133/08; C08L; C08L61/00; C08L61/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
227 words
A one-pack high solid coating composition consisting essentially of (I) 100 parts by weight of an acrylic resin which is a copolymer having a glass transition temperature of -30° to -50° C. and a hydroxyl number of 40 to 280 and being prepared from (a) one or more members selected from hydroxyalkyl acrylates and methacrylates of the formula ##STR10## wherein R represents a hydrogen atom or a methyl group and R 1 represents a divalent alkyl group having 2 to 5 carbon atoms, and (b) one or more members selected from alkyl acrylates and methacrylates of the formula ##STR11## wherein R is as defined above and R 2 represents a monovalent alkyl group having 1 to 12 carbon atoms, and glycidyl acrylates and methacrylates of the formula ##STR12## wherein R is as defined above and R 3 represents a divalent alkyl group having 1 to 5 carbon atoms, (II) 20 to 160 parts by weight of an amino-formaldehyde resin etherified with a monohydric alcohol having 1 to 4 carbon atoms, and (III) 0.5 to 6 parts by weight, per 100 parts by weight of the total of the acrylic resin as component (I) and the etherified amino-formaldehyde resin as component (II) combined, of a sulfonic acid catalyst blocked by an epoxy resin, said amount of the blocked acid catalyst being expressed in the amount of its acid.
Claim 2
Dependent Claim
227 words
A one-pack high solid coating composition consisting essentially of (I) 100 parts by weight of an acrylic resin which is a copolymer having a glass transition temperature of -30° to -50° C. and a hydroxyl number of 40 to 280 and being prepared from (a) one or more members selected from hydroxyalkyl acrylates and methacrylates of the formula ##STR10## wherein R represents a hydrogen atom or a methyl group and R 1 represents a divalent alkyl group having 2 to 5 carbon atoms, and (b) one or more members selected from alkyl acrylates and methacrylates of the formula ##STR11## wherein R is as defined above and R 2 represents a monovalent alkyl group having 1 to 12 carbon atoms, and glycidyl acrylates and methacrylates of the formula ##STR12## wherein R is as defined above and R 3 represents a divalent alkyl group having 1 to 5 carbon atoms, (II) 20 to 160 parts by weight of an amino-formaldehyde resin etherified with a monohydric alcohol having 1 to 4 carbon atoms, and (III) 0.5 to 6 parts by weight, per 100 parts by weight of the total of the acrylic resin as component (I) and the etherified amino-formaldehyde resin as component (II) combined, of a sulfonic acid catalyst blocked by an epoxy resin, said amount of the blocked acid catalyst being expressed in the amount of its acid.
Claim 3
Dependent Claim
69 words
A composition as recited in claim 1, wherein the acrylic resin as component (I) is a copolymer having a glass transition temperature of -30° to -50° C. and a hydroxyl number of 40 to 280 and being prepared from a monomer mixture of the component (a), the component (b) and up to 5% by weight, based on the weight of the monomer mixture, of acrylic acid or methacrylic acid.
Claim 4
Dependent Claim
78 words
A composition as recited in claim 1, wherein the acrylic resin is a copolymer having a glass transition temperature of -30° to -50° C. and a hydroxyl number of 40 to 280 and being prepared from a monomer mixture of the component (a) and the component (b), said monomer mixture being one in which not more than 50% by weight of the total amount of the components (a) and (b) is replaced with another ethylenically unsaturated polymerizable monomer.
Claim 5
Dependent Claim
40 words
A composition as recited in claim 1, wherein the etherified amino-formaldehyde resin as component (II) is prepared by etherifying 30% or more of the methylol groups of an amino-formaldehyde resin with a monohydric alcohol having 1 to 4 carbon atoms.
Claim 6
Dependent Claim
33 words
A composition as recited in claim 1, wherein the acrylic resin as component (I) has a molecular weight, expressed in a peak molecular weight by gel permeation chromatography, of about 5,000 to 50,000.
Claim 7
Dependent Claim
26 words
A composition as recited in claim 1, which contains, in addition to the components (I), (II) and (III), a film-forming cellulose derivative as an auxiliary vehicle.
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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) | 1984-09-21 | 1985-03-23 | 1985-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-21 | 1989-03-23 | 1989-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-21 | 1993-03-23 | 1993-09-22 | $7700.00 | Window Closed / Lapsed |