Patent US4617349A successfully refreshed from Google Patents.
US4617349A
Expired / Lapsed
US
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Urethane resin compositions
Assignee: Takeda Pharmaceutical Co Ltd
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Filing: 1985-10-28
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Granted: 1986-10-14
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Expires: 2005-10-28
Abstract
Abstract A urethane resin composition which comprises (i) a polyisocyanate component having 20/80 to 80/20 of a weight ratio on a solid basis of an α, α, α', α'-tetramethyl-xylylene diisocyanate derivative to a hexamethylene diisocyanate derivative and (ii) an acrylic polyol. The urethane resin composition can provide coating films with excellent drying property, mechanical properties, weathering resistance and chemical resistance, and are advantageously used, for example, as a paint for automobile repairing uses.
Inventors
- 👤 Kohji Nasu
- 👤 Ichiro Minato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:36
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/04; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/721; C08G18/724; C08G18/28; C08G18/40; C08G18/62; C08G18/6216; C08G18/74; C08G18/76; C08G18/7614; C08G18/7628; C08G18/765; C08G18/77; C08G18/78; C08G18/7806; C08G18/7818; C08G18/7831; C08G18/79; C08G18/80; C08G18/8003; C08G18/8006; C08G18/8009
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
37 words
A urethane resin composition which comprises (i) a polyisocyanate component having 20/80 to 80/20 of a weight ratio on a solid basis of an α,α,α',α'-tetramethyl-xylylene diisocyanate derivative to a hexamethylene diisocyanate derivative and (ii) an acrylic polyol.
Claim 2
Dependent Claim
37 words
A urethane resin composition which comprises (i) a polyisocyanate component having 20/80 to 80/20 of a weight ratio on a solid basis of an α,α,α',α'-tetramethyl-xylylene diisocyanate derivative to a hexamethylene diisocyanate derivative and (ii) an acrylic polyol.
Claim 3
Dependent Claim
33 words
A urethane resin composition as claimed in claim 1, wherein the α,α,α',α'-tetramethyl-xylylene diisocyanate derivative is a prepolymer obtained by the reaction of α,α,α',α'-tetramethyl-xylylene diisocyanate with a low-molecular-weight polyol at an excessive isocyanate/hydroxyl ratio.
Claim 4
Dependent Claim
53 words
A urethane resin composition as claimed in claim 1, wherein the hexamethylene diisocyanate derivative is a prepolymer obtained by the reaction of hexamethylene diisocyanate with a low-molecular weight polyol, a biuret derivative obtained by the reaction of hexamethylene diisocyanate with water or an amine or a dimerized or trimerized product of hexamethylene diisocyanate.
Claim 5
Dependent Claim
47 words
A urethane resin composition as claimed in claim 1, wherein the mixing ratio of the α,α,α',α'-tetramethyl-xylylene diisocyanate derivative to the hexamethylene diisocyanate derivative is in such an amount as corresponds to a weight ratio as converted on a solid basis in the range of 30/70 to 70/30.
Claim 6
Dependent Claim
31 words
A urethane resin composition as claimed in claim 1, wherein the acrylic polyol is one having a molecular weight of 1,000 to 100,000 and a hydroxyl value of 20 to 200.
Claim 7
Dependent Claim
30 words
A urethane resin composition as claimed in claim 1, wherein the formulating ratio of the components (i) and (ii) is in the NCO/OH equivalent ratio of about 0.2 to 3.0.
Claim 8
Dependent Claim
30 words
A urethane resin composition as claimed in claim 1, wherein the formulating ratio of the components (i) and (ii) is in the NCO/OH equivalent ratio of about 0.7 to 1.5.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-13 | 1990-04-14 | 1990-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-13 | 1994-04-14 | 1994-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-13 | 1998-04-14 | 1998-10-14 | $7700.00 | Window Closed / Lapsed |