Patent US3383192A successfully refreshed from Google Patents.
US4151152A
Expired / Lapsed
US
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Stable fast-setting varnishes based on polyesters and blocked aliphatic diisocyanate
Assignee: Veba Oel AG
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Filing: 1977-06-27
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Granted: 1979-04-24
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Expires: 1997-06-27
Abstract
Abstract A process for preparing fast setting varnishes for coating preferably metallic materials with highly deformable coatings by thermal treatment at temperatures exceeding 175° C., preferably at 180°-450° C., consisting of a binding agent mixture dissolved in high-boiling varnish solvents and consisting of 50-90 percent by weight of a high-molecular, hydroxyl-group containing polyester on the basis of mainly aromatic dicarboxylic acids and diols and/or triols having 4-12 carbon atoms; and 10-50 percent by weight of adducts on the basis of 3-isocyanato-methyl-3,5,5-trimethylcyclohexylisocyanate blocked with ε-caprolactam; plus, if desired, varnish additives, dyes and/or pigments.
Inventors
- 👤 Karl Schmitt
- 👤 Josef Disteldorf
- 👤 Flexi Schmitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:13
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4205; C08G18/4208; C08G18/4211; C08G18/4219; C08G18/70; C08G18/72; C08G18/74; C08G18/75; C08G18/751; C08G18/752; C08G18/753; C08G18/755; C08G18/80; C08G18/8061; C08G18/807; C08G18/8074; C09; C09D; C09D175/00; C09D175/04; C09D175/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
189 words
A liquid varnish consisting essentially of (I) a high boiling varnish solvent; and (II) a binder consisting essentially of a mixture of A. 50-90% by weight of a hydroxyl group containing polyester having a hydroxyl number between 50 and 150 mgs/KOHg, said hydroxyl group containing polyester prepared by reacting an aromatic dicarboxylic acid, ester or anhydride with a diol and/or triol having 4-12 carbon atoms, the molar ratio of aromatic hydroxyl containing polyester to any polyester having aliphatic or cycloaliphatic dicarboxylic acid residues being greater than 4:1, and B. 10-50% by weight of an adduct of 2-isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate blocked with epsilon-caprolactam, wherein (a) the hydroxy containing polyester is prepared by condensation of a reaction mixture consisting essentially of terephthalic acid dimethyl ester, a mixture of 2,2,4- and 2,4,4-trimethylolhexanediol-1,6 and 1,1,1-trimethylolpropane, the resultant polyester having a molecular weight of 1600 to 1700; (b) the solvent comprises ethylglycol acetate and a mixture of aromatic hydrocarbons boiling in a range of 180°-212° C. and having a flame point of at least 65° C.; and (c) the liquid varnish remaining clear when stored at room temperature for a period of at least one month.
Claim 2
Dependent Claim
189 words
A liquid varnish consisting essentially of (I) a high boiling varnish solvent; and (II) a binder consisting essentially of a mixture of A. 50-90% by weight of a hydroxyl group containing polyester having a hydroxyl number between 50 and 150 mgs/KOHg, said hydroxyl group containing polyester prepared by reacting an aromatic dicarboxylic acid, ester or anhydride with a diol and/or triol having 4-12 carbon atoms, the molar ratio of aromatic hydroxyl containing polyester to any polyester having aliphatic or cycloaliphatic dicarboxylic acid residues being greater than 4:1, and B. 10-50% by weight of an adduct of 2-isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate blocked with epsilon-caprolactam, wherein (a) the hydroxy containing polyester is prepared by condensation of a reaction mixture consisting essentially of terephthalic acid dimethyl ester, a mixture of 2,2,4- and 2,4,4-trimethylolhexanediol-1,6 and 1,1,1-trimethylolpropane, the resultant polyester having a molecular weight of 1600 to 1700; (b) the solvent comprises ethylglycol acetate and a mixture of aromatic hydrocarbons boiling in a range of 180°-212° C. and having a flame point of at least 65° C.; and (c) the liquid varnish remaining clear when stored at room temperature for a period of at least one month.
Claim 3
Dependent Claim
178 words
A liquid varnish consisting essentially of (I) A high boiling varnish solvent; and (II) A binder consisting essentially of a mixture of A. 50-90% by weight of a hydroxyl group containing polyester having a hydroxyl number between 50 and 150 mgs/KOHg, said hydroxyl group containing polyesters prepared by reacting an aromatic dicarboxylic acid, ester or anhydride with a diol and/or triol having 4-12 carbon atoms, the molar ratio of aromatic hydroxyl containing polyester to any polyester having aliphatic or cycloaliphatic dicarboxylic acid residues being greater than 4:1; and B. 10-50% by weight of an adduct of 2-isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate blocked with epsilon-caprolactam, wherein: (a) the aromatic hydroxy polyester is prepared by condensation of a reaction mixture consisting essentially of isophthalic acid, hexanediol-1,6 and 1,1,1-trimethylol propane; (b) the solvent is a mixture of ethylglycol acetate and a mixture of aromatic hydrocarbons boiling at a range of 180°-212° C. having a flame point of at least 65° C.; (c) the liquid varnish remaining clear when stored at a temperature between 5° and 8° C. over a period of at least four weeks.
Claim 4
Dependent Claim
178 words
A liquid varnish consisting essentially of (I) A high boiling varnish solvent; and (II) A binder consisting essentially of a mixture of A. 50-90% by weight of a hydroxyl group containing polyester having a hydroxyl number between 50 and 150 mgs/KOHg, said hydroxyl group containing polyesters prepared by reacting an aromatic dicarboxylic acid, ester or anhydride with a diol and/or triol having 4-12 carbon atoms, the molar ratio of aromatic hydroxyl containing polyester to any polyester having aliphatic or cycloaliphatic dicarboxylic acid residues being greater than 4:1; and B. 10-50% by weight of an adduct of 2-isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate blocked with epsilon-caprolactam, wherein: (a) the aromatic hydroxy polyester is prepared by condensation of a reaction mixture consisting essentially of isophthalic acid, hexanediol-1,6 and 1,1,1-trimethylol propane; (b) the solvent is a mixture of ethylglycol acetate and a mixture of aromatic hydrocarbons boiling at a range of 180°-212° C. having a flame point of at least 65° C.; (c) the liquid varnish remaining clear when stored at a temperature between 5° and 8° C. over a period of at least four weeks.
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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) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |