Patent US4298658A successfully refreshed from Google Patents.
US4298658A
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Vapor permeation curable coatings based on alkyd resins
Assignee: RESCO CHEMICALS AND COLOURS Ltd
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Filing: 1980-05-01
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Granted: 1981-11-03
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Expires: 2000-05-01
Abstract
Abstract Improved coating compositions for use in diversified applications, curable by permeation of a tertiary amine vapor or without permeation at room temperature. The composition and the coating process are characterized by the modification of an alkyd resin, having free hydroxyl groups, by reaction with p-hydroxybenzoic acid or 2,6-dimethylol-p-cresol. The coatings display good flexibility and high gloss as well as good color retention and good adhesion to substrates.
Inventors
- 👤 Chacko Thankachan
- 👤 John G. Ritchie
- 👤 Eugene Sahayada
- 👤 Asok Sengupta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:20
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4266; C08G18/4286; C08G18/4288; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31591; Y10T428/31598; Y10T428/31601; Y10T428/31605
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
113 words
A process for producing a coated surface comprising: (a) applying to a surface to be coated, a liquid film of a urethane forming composition comprising: (i) an alkyd resin modified with 2,6-dimethylol-p-cresol to provide side chain aromatic hydroxyl groups on the alkyd resin backbone, and (ii) at least one organic isocyanate selected from the group consisting of di- and poly-isocyanates, said at least one isocyanate having an at least partial aromatic character, wherein (iii) components (i) and (ii) are present in amounts such that the radio of active hydroxyl hydrogen groups in (i) to isocyanate groups in (ii) is 1:1 to 1.5, and (b) curing the composition to form a solid urethane coating.
Claim 2
Dependent Claim
113 words
A process for producing a coated surface comprising: (a) applying to a surface to be coated, a liquid film of a urethane forming composition comprising: (i) an alkyd resin modified with 2,6-dimethylol-p-cresol to provide side chain aromatic hydroxyl groups on the alkyd resin backbone, and (ii) at least one organic isocyanate selected from the group consisting of di- and poly-isocyanates, said at least one isocyanate having an at least partial aromatic character, wherein (iii) components (i) and (ii) are present in amounts such that the radio of active hydroxyl hydrogen groups in (i) to isocyanate groups in (ii) is 1:1 to 1.5, and (b) curing the composition to form a solid urethane coating.
Claim 3
Dependent Claim
19 words
A process according to claim 1, wherein said curing comprises exposing said liquid film to a tertiary amine vapour.
Claim 4
Dependent Claim
11 words
A process according to claim 2, wherein said amine is triethylamine.
Claim 5
Dependent Claim
86 words
A process according to claim 1, wherein the modified alkyd resin is prepared in a two stage process, in which the first stage comprises reacting together at a temperature of 320° to 460° F. a mixture comprising an excess of at least one di- or polyhydric aliphatic alcohol, at least one acid component selected from the group consisting of di- and polybasic acids and anhydrides of said acids and a drying oil to form an alkyd, and in a second stage reacting the alkyd with 2,6-dimethylol-p-cresol.
Claim 6
Dependent Claim
26 words
A process according to claim 4, wherein said alcohol comprises a mixture of trimethylolpropane and pentaerythritol, and said acid component comprises adipic acid and phthalic anhydride.
Claim 7
Dependent Claim
14 words
A process according to claim 5, wherein said drying oil comprises soya fatty acids.
Claim 8
Dependent Claim
43 words
A process according to claim 5, wherein said composition is applied to a wood-based sheet substrate in a wet thickness of 1.25 to 1.75 mils and said liquid film is exposed to said vapour for 5 to 25 seconds to effect said curing.
Claim 9
Dependent Claim
18 words
A process according to claim 7, wherein said isocyanate is a polymer of toluene diisocyanate and hexamethylene diisocyanate.
Claim 10
Dependent Claim
17 words
A process according to claim 7, wherein said isocyanate is an adduct of toluene diisocyanate and trimethylolpropane.
Claim 11
Dependent Claim
35 words
A process according to claim 1, wherein components (i) and (ii) are present in amounts such that the ratio of active hydroxyl hydrogen groups in (i) to isocyanate groups in (ii) is 1:1.1 to 1.2.
Claim 12
Dependent Claim
81 words
A curable coating composition comprising: (i) an alkyd resin modified with 2,6-dimethylol-p-cresol, to provide side chain aromatic hydroxyl groups in the alkyd resin backbone, in admixture with (ii) at least one organic isocyanate selected from the group consisting of diisocyanates and polyisocyanates, said isocyanate having an at least partial aromatic character, wherein (iii) components (i) and (ii) are present in amounts such that the ratio of active hydroxyl hydrogen groups in (i) to isocyanate groups in (ii) is 1:1 to 1.5.
Claim 13
Dependent Claim
81 words
A curable coating composition comprising: (i) an alkyd resin modified with 2,6-dimethylol-p-cresol, to provide side chain aromatic hydroxyl groups in the alkyd resin backbone, in admixture with (ii) at least one organic isocyanate selected from the group consisting of diisocyanates and polyisocyanates, said isocyanate having an at least partial aromatic character, wherein (iii) components (i) and (ii) are present in amounts such that the ratio of active hydroxyl hydrogen groups in (i) to isocyanate groups in (ii) is 1:1 to 1.5.
Claim 14
Dependent Claim
12 words
A composition according to claim 11, further including an organic tertiary amine.
Claim 15
Dependent Claim
86 words
A composition according to claim 11, wherein the modified alkyd resin is prepared in a two stage process, in which the first stage comprises reacting together at a temperature of 320° to 460° F. a mixture comprising an excess of at least one di- or polyhydric aliphatic alcohol, at least one acid component selected from the group consisting of di- and polybasic acids and anhydrides of said acids and a drying oil to form an alkyl, and in a second stage reacting the alkyd with 2,6-dimethylol-p-cresol.
Claim 16
Dependent Claim
26 words
A composition according to claim 13, wherein said alcohol comprises a mixture of trimethylolpropane and pentaerythritol, and said acid component comprises adipic acid and phthalic anhydride.
Claim 17
Dependent Claim
18 words
A composition according to claim 14, wherein said isocyanate is a polymer of toluene diisocyanate and hexamethylene diisocyanate.
Claim 18
Dependent Claim
17 words
A composition according to claim 14, wherein said isocyanate is an adduct of toluene diisocyanate and trimethylolpropane.
Claim 19
Dependent Claim
35 words
A composition according to claim 14, wherein components (i) and (ii) are present in amounts such that the ratio of active hydroxyl hydrogen groups in (i) to isocyanate groups in (ii) is 1:1.1 to 1.2.
Claim 20
Dependent Claim
95 words
An article comprising a substrate coated with a cured urethane coating derived from a urethane forming composition comprising: (i) an alkyd resin modified with 2,6-dimethylol-p-cresol to provide side chain aromatic hydroxyl groups on the alkyd resin backbone, and (ii) at least one organic isocyanate selected from the group consisting of di- and polyisocyanates, said at least one isocyanate having an at least partial aromatic character, wherein (iii) components (i) and (ii) are present in amounts such that the ratio of active hydroxyl hydrogen groups in (i) to isocyanate groups in (ii) is 1:1 to 1.5.
Claim 21
Dependent Claim
95 words
An article comprising a substrate coated with a cured urethane coating derived from a urethane forming composition comprising: (i) an alkyd resin modified with 2,6-dimethylol-p-cresol to provide side chain aromatic hydroxyl groups on the alkyd resin backbone, and (ii) at least one organic isocyanate selected from the group consisting of di- and polyisocyanates, said at least one isocyanate having an at least partial aromatic character, wherein (iii) components (i) and (ii) are present in amounts such that the ratio of active hydroxyl hydrogen groups in (i) to isocyanate groups in (ii) is 1:1 to 1.5.
Claim 22
Dependent Claim
13 words
An article according to claim 18, wherein said substrate comprises a wood-based sheet.
Claim 23
Dependent Claim
86 words
An article according to claim 18, wherein the modified alkyd resin is prepared in a two stage process, in which the first stage comprises reacting together at a temperature of 320° to 460° F. a mixture comprising an excess of at least one di- or polyhydric aliphatic alcohol, at least one acid component selected from the group consisting of di- and polybasic acids and anhydrides of said acids and a drying oil to form an alkyd, and in a second stage reacting the alkyd with 2,6-dimethylol-p-cresol.
Claim 24
Dependent Claim
26 words
An article according to claim 20, wherein said alcohol comprises a mixture of trimethylolpropane and pentaerythritol, and said acid component comprises adipic acid and phthalic anhydride.
Claim 25
Dependent Claim
18 words
An article according to claim 21, wherein said isocyanate is a polymer of toluene diisocyanate and hexamethylene diisocyanate.
Claim 26
Dependent Claim
17 words
An article according to claim 21, wherein said isocyanate is an adduct of toluene diisocyanate and trimethylolpropane.
Claim 27
Dependent Claim
35 words
An article according to claim 18, wherein components (i) and (ii) are present in amounts such that the ratio of active hydroxyl hydrogen groups in (i) to isocyanate groups in (ii) is 1:1.1 to 1.2.
References Cited (Backward Citations)
US3789037A
Cited
US3920595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-02 | 1985-05-04 | 1985-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-02 | 1989-05-04 | 1989-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-02 | 1993-05-04 | 1993-11-03 | $7700.00 | Window Closed / Lapsed |