US4725661A
Expired / Lapsed
US
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One-can thermosetting resin compositions
Assignee: Takeda Pharmaceutical Co Ltd
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Filing: 1987-04-08
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Granted: 1988-02-16
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Expires: 2007-04-08
Abstract
Abstract A one-can thermosetting resin composition comprising (a) a polyester polyol which is obtainable by allowing dicarboxylic acid to react with glycol and polyol having at least three OH groups, either one of the dicarboxylic acid and the glycol being an aliphatic one and the other being a cyclic one, whose hydroxyl value is 20-300, and (b) a blocked a,a,a',a'-tetramethyl-xylene diisocyanate or/and 4,4'-methylene bis(cyclohexyl isocyanate) or a blocked NCO-terminated prepolymer which is obtained by allowing α,α,α',α'-tetramethyl-xylene diisocyanate or/and 4,4'-methylenebis(cyclohexyl isocyanate) to react with an active hydrogen compound, give excellent coating films in yellowing and thermal degradation, and also in increased hardness as well as a high flexibility, stain resistance and chemical resistance. When the composition is used for preparing precoated metals, it gives good steel plates, thus being advantageously utilized for, among others, light electrical appliances.
Inventors
- 👤 Shigeaki Miyabayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:03
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/42; C08G18/4205; C08G18/74; C08G18/75; C08G18/758; C08G18/76; C08G18/7614; C08G18/7628; C08G18/765; C08G18/8003; C08G18/8006; C08G18/8009; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31605
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
92 words
A one-can thermosetting resin composition comprising (a) a polyester polyol which is obtainable by allowing dicarboxylic acid to react with a glycol and a polyol having at least three OH groups, either by one of the dicarboxylic acid and the glycol being an aliphatic one and the other being a cyclic one, whose hydroxyl value is 20-300, and (b) a blocked a,a,a',a'-tetramethyl-xylene diisocyanate or/and 4,4'-methylene bis (cyclohexyl isocyanate) or a blocked NCO-terminated prepolymer which is obtained by allowing a,a,a',a'-tetramethyl-xylene diisocyanate or/and 4,4'-methylene bis (cyclohexyl isocyanat) to react with an active hydrogen compound.
Claim 2
Dependent Claim
92 words
A one-can thermosetting resin composition comprising (a) a polyester polyol which is obtainable by allowing dicarboxylic acid to react with a glycol and a polyol having at least three OH groups, either by one of the dicarboxylic acid and the glycol being an aliphatic one and the other being a cyclic one, whose hydroxyl value is 20-300, and (b) a blocked a,a,a',a'-tetramethyl-xylene diisocyanate or/and 4,4'-methylene bis (cyclohexyl isocyanate) or a blocked NCO-terminated prepolymer which is obtained by allowing a,a,a',a'-tetramethyl-xylene diisocyanate or/and 4,4'-methylene bis (cyclohexyl isocyanat) to react with an active hydrogen compound.
Claim 3
Dependent Claim
46 words
The composition as claimed in claim 1, wherein the polyester polyol (a) is one obtained by the reaction of sebacic acid, cyclohexane dimethanol and trimethylol propane and the blocked NCO-terminated prepolymer (b) is one obtained by the reaction of α,α,α',α',-tetamethyl-m-xylene diisocyanate-trimethlolpropane prepolymer with methyl ethyl ketoxime.
Claim 4
Dependent Claim
45 words
The composition as claimed in claim 1, wherein the polyester polyol (a) is one obtained by the reaction of sebacic acid, bis-hydroxyethyl terephthalate and trimethylolpropane and the blocked NCO-terminated prepolymer (b) is one obtained by the reaction of α,α,α',α'-tetramethyl-m-xylene diisocyanate-trimethylolpropane prepolymer with methyl ethyl ketoxime.
Claim 5
Dependent Claim
112 words
A precoat metal, which has been prepared by coating a metal plate with a compositin comprising (a) a polyester polyol which is obtainable by allowing dicarboxylic acid to react with a glycol and a polyol haing at least three OH groups, either one of the dicarboxylic acid and the glycol being an aliphatic one and the other being a cyclic one, whose hydroxyl value is 20-300, and (b) a blocked a,a,a',a'-tetramethyl-xylene diisocyanate or/and 4,4'-methylene bis (cyclohexyl isocyanate) or a blocked NCO-terminated prepolymer which is obtained by allowing a,a,a',a'-tetramethyl-xylene diisocyanate or/and 4,4'-methylene bis (cyclohexyl isocyanate) to react with an active hydrogen compound, and heating the coated metal plate to cure the coating material.
Claim 6
Dependent Claim
112 words
A precoat metal, which has been prepared by coating a metal plate with a compositin comprising (a) a polyester polyol which is obtainable by allowing dicarboxylic acid to react with a glycol and a polyol haing at least three OH groups, either one of the dicarboxylic acid and the glycol being an aliphatic one and the other being a cyclic one, whose hydroxyl value is 20-300, and (b) a blocked a,a,a',a'-tetramethyl-xylene diisocyanate or/and 4,4'-methylene bis (cyclohexyl isocyanate) or a blocked NCO-terminated prepolymer which is obtained by allowing a,a,a',a'-tetramethyl-xylene diisocyanate or/and 4,4'-methylene bis (cyclohexyl isocyanate) to react with an active hydrogen compound, and heating the coated metal plate to cure the coating material.
Claim 7
Dependent Claim
46 words
The precoat metal as claimed in claim 4, wherein the polyester polyol (a) is one obtained by the reaction of sebacic acid, cyclohexane dimethanol and trimethylol propane and the blocked NCO-terminated prepolymer (b) is one obtained by the reaction of α,α,α',α'-tetramethyl-m-diisocyanate-trimethylolpropane prepolymer with methyl ethyl ketoxime.
Claim 8
Dependent Claim
46 words
The precoat metal as claimed in claim 4, wherein the polyester polyol (a) is one obtained by the reaction of sebacic acid, bis-hydroxyethyl terephthalate and trimethylolpropane and the blocked NCO-terminated prepolymer (b) is one obtained by the reaction of α,α,α',α'-tetramethyl-m diisocyanate-trimethylolpropane prepolymer with methyl ethyl ketoxime.
Claim 9
Dependent Claim
113 words
A process for preparing a precoat metal which comprises coating a metal plate with a composition comprising (a) a polyester polyol which is obtainable by allowing dicarboxylic acid to react with glycol and a polyol having at least three OH groups, either one of the dicarboxylic acid and the glycol being an aliphatic one and the other being a cyclic one, whose hydroxyl value is 20-300, and (b) a blocked a,a,a', a'-tetramethyl-xylene diisocyanate or/and 4,4'-methylene bis (cyclohexyl isocyanate) or a blocked NCO-terminated prepolymer which is obtained by allowing a,a,a',a'-tetramethyl-xylene diisocyanate or/and 4,4'-methylene bis (cyclohexyl isocyanate) to react with an active hydrogen compound, and heating the coated metal plate to cure the coating material.
Claim 10
Dependent Claim
113 words
A process for preparing a precoat metal which comprises coating a metal plate with a composition comprising (a) a polyester polyol which is obtainable by allowing dicarboxylic acid to react with glycol and a polyol having at least three OH groups, either one of the dicarboxylic acid and the glycol being an aliphatic one and the other being a cyclic one, whose hydroxyl value is 20-300, and (b) a blocked a,a,a', a'-tetramethyl-xylene diisocyanate or/and 4,4'-methylene bis (cyclohexyl isocyanate) or a blocked NCO-terminated prepolymer which is obtained by allowing a,a,a',a'-tetramethyl-xylene diisocyanate or/and 4,4'-methylene bis (cyclohexyl isocyanate) to react with an active hydrogen compound, and heating the coated metal plate to cure the coating material.
Claim 11
Dependent Claim
27 words
The process as claimed in claim 7, wherein the heating temperature is about 150°-350° C. and the heating time is in the range of about 20-120 seconds.
References Cited (Backward Citations)
US4562714A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-15 | 1991-08-17 | 1992-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-15 | 1995-08-17 | 1996-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-15 | 1999-08-17 | 2000-02-16 | $7700.00 | Window Closed / Lapsed |