US4247675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane resins and polyurethane resin coating compositions
Assignee: Toray Industries Inc
•
Filing: 1979-08-14
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Granted: 1981-01-27
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Expires: 1999-08-14
Abstract
Abstract Polyurethane resins with an excellent weather resistance are provided by the reaction of polyols with trifunctional isocyanates which are expressed by the following general formula: ##STR1## (R=a remnant of divalent hydrocarbon group with carbon number of 2 or 3) The reaction between a polyol and a trifunctional isocyanate is effectuated at an NCO/OH mole percentage of 0.5 to 2.0, and adjustments are made so that the concentration of carbamide group will be 5×10 -4 to 50×10 -4 moles per gram of the reaction product, and that the bridging parameter will be 150 to 1,500. The resins may be used to best advantage as polyurethane resin coatings excelling in weather resistance.
Inventors
- 👤 Tadanori Fukuda
- 👤 Sadayuki Sakamoto
- 👤 Masami Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:49
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/771
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
86 words
A polyurethane resin having an excellent weather resistance, which is a reaction product obtained by causing (A) a polyol to react with (B) a trifunctional isocyanate which is expressed by the following general formula: ##STR9## (R=a remnant of divalent hydrocarbon group with the carbon number of 2 or 3 (at an NCO/OH mole percentage of 0.5 to 2.0: and of which the concentration of carbamid group is 5×10 -4 to 50×10 -4 moles per gram of said reaction product, and the bridging parameter 150 to 1,500.
Claim 2
Dependent Claim
86 words
A polyurethane resin having an excellent weather resistance, which is a reaction product obtained by causing (A) a polyol to react with (B) a trifunctional isocyanate which is expressed by the following general formula: ##STR9## (R=a remnant of divalent hydrocarbon group with the carbon number of 2 or 3 (at an NCO/OH mole percentage of 0.5 to 2.0: and of which the concentration of carbamid group is 5×10 -4 to 50×10 -4 moles per gram of said reaction product, and the bridging parameter 150 to 1,500.
Claim 3
Dependent Claim
22 words
A polyurethane resin as claimed in claim 1, wherein the molecular weight of polyol is in the range of 500 to 5,000.
Claim 4
Dependent Claim
94 words
A film coat having an excellent weather resistance, whereof the main ingredient is a polyurethane resin which is a reaction product obtained by causing (A) a polyol to react with (B) a trifunctional isocyanate which is expressed by the following general formula: ##STR10## (R=a remnant of divalent hydrocarbon group with the carbon number of 2 or 3) at an NCO/OH mole percentage of 0.5 to 2.0; and of which the concentration of carbamide group is 5×10 -4 to 50×10 -4 moles per gram of said reaction product, and the bridging parameter 150 to 1,500.
Claim 5
Dependent Claim
94 words
A film coat having an excellent weather resistance, whereof the main ingredient is a polyurethane resin which is a reaction product obtained by causing (A) a polyol to react with (B) a trifunctional isocyanate which is expressed by the following general formula: ##STR10## (R=a remnant of divalent hydrocarbon group with the carbon number of 2 or 3) at an NCO/OH mole percentage of 0.5 to 2.0; and of which the concentration of carbamide group is 5×10 -4 to 50×10 -4 moles per gram of said reaction product, and the bridging parameter 150 to 1,500.
Claim 6
Dependent Claim
22 words
A film coat as claimed in claim 3, wherein the molecular weight of polyol is in the range of 500 to 5,000.
Claim 7
Dependent Claim
29 words
A film coat as claimed in claim 3, wherein the polyol used is a polyester polyol of which the molecular weight is in the range of 500 to 1,000.
Claim 8
Dependent Claim
29 words
A film coat as claimed in claim 3, wherein the polyol used is a polyacryl polyol of which the molecular weight is in the range of 1,000 to 3,000.
Claim 9
Dependent Claim
21 words
A film coat as claimed in claim 3, wherein the NCO/OH mole percentage is in the range of 0.5 to 1.2.
Claim 10
Dependent Claim
36 words
A film coat as claimed in claim 6, wherein the polyacryl polyol used is a copolymer composed mainly of hydroxyalkyl acrylate and/or hydroxyalkyl methacrylate, and alkyl ester of acrylic acid and/or alkyl ester of methacrylic acid.
Claim 11
Dependent Claim
76 words
A two-component type polyurethane resin coating composed of: (A) a kneaded mixture of a polyol and a pigment which is added to it at need; and (B) a trifunctional isocyanate which is expressed by the following general formula: ##STR11## (R=a remnant of divalent hydrocarbon group with the carbon number of 2 or 3) and which has been diluted with a solvent at need, the amount of solvent in (B) being 0 to 50 pct. by wt.
Claim 12
Dependent Claim
76 words
A two-component type polyurethane resin coating composed of: (A) a kneaded mixture of a polyol and a pigment which is added to it at need; and (B) a trifunctional isocyanate which is expressed by the following general formula: ##STR11## (R=a remnant of divalent hydrocarbon group with the carbon number of 2 or 3) and which has been diluted with a solvent at need, the amount of solvent in (B) being 0 to 50 pct. by wt.
Claim 13
Dependent Claim
27 words
A coating as claimed in claim 9, wherein more than 50 pct. by wt. of the solvent used and the thinner added at need is hydrocarbon solvents.
Claim 14
Dependent Claim
57 words
A one-component type polyurethane resin coating whereof the main ingredients are: a polyol and a trifunctional isocyanate which is expressed by the following general formula: ##STR12## (R=a remnant of divalent hydrocarbon group with the carbon number of 2 or 3) and of which the isocyanate group has been blocked with a blocking agent, i.e., a blocked isocyanate.
Claim 15
Dependent Claim
57 words
A one-component type polyurethane resin coating whereof the main ingredients are: a polyol and a trifunctional isocyanate which is expressed by the following general formula: ##STR12## (R=a remnant of divalent hydrocarbon group with the carbon number of 2 or 3) and of which the isocyanate group has been blocked with a blocking agent, i.e., a blocked isocyanate.
Claim 16
Dependent Claim
25 words
A coating as claimed in claim 11, wherein more than 50 pct. by wt. of the solvent which is added at need is hydrocarbon solvents.
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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) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |