Patent US4705839A successfully refreshed from Google Patents.
US4705839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Urethane nonaqueous dispersion for automotive base coat/clear coat applications
Assignee: BASF Corp
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Filing: 1987-03-31
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Granted: 1987-11-10
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Expires: 2007-03-31
Abstract
Abstract The present invention discloses a nonaqueous dispersion of urethane copolymers dispersed in a solvent which is less polar than the urethane copolymer segment wherein the urethane copolymers are the reaction products of a stabilizer, an aliphatic polyol and diisocyanates. Also disclosed is a method for making the nonaqueous polyurethane dispersions.
Inventors
- 👤 Glenn E. Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:24
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/2805; C08G18/2815; C08G18/284; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
81 words
A nonaqueous dispersion particularly adapted for use in automotive base coat/clear coat applications comprising: a urethane copolymer dispersed throughout a solvent, said solvent being less polar than the urethane copolymer, wherein said urethane copolymer is the reaction product of a stabilizer, polyols, and diisocyanate, and said stabilizer is the reaction product of a carboxylic acid and a monoepoxide, said nonaqueous dispersion when used to produce automotive base coats results in a high solids, low viscosity base coat with good rheology control.
Claim 2
Dependent Claim
81 words
A nonaqueous dispersion particularly adapted for use in automotive base coat/clear coat applications comprising: a urethane copolymer dispersed throughout a solvent, said solvent being less polar than the urethane copolymer, wherein said urethane copolymer is the reaction product of a stabilizer, polyols, and diisocyanate, and said stabilizer is the reaction product of a carboxylic acid and a monoepoxide, said nonaqueous dispersion when used to produce automotive base coats results in a high solids, low viscosity base coat with good rheology control.
Claim 3
Independent Claim
59 words
A method of making a nonaqueous dispersion for use in automotive base coat/clear coat applications comprising: preparing a stabilizer by reacting a carboxylic acid with a monoepoxide; reacting the stabilizer with polyols and diisocyanate to produce a urethane copolymer, dispersing the copolymer in a solvent having a polarity less than that of the copolymer to form a nonaqueous dispersion.
Claim 4
Independent Claim
59 words
A method of making a nonaqueous dispersion for use in automotive base coat/clear coat applications comprising: preparing a stabilizer by reacting a carboxylic acid with a monoepoxide; reacting the stabilizer with polyols and diisocyanate to produce a urethane copolymer, dispersing the copolymer in a solvent having a polarity less than that of the copolymer to form a nonaqueous dispersion.
Claim 5
Dependent Claim
13 words
The dispersion of claim 1 wherein the urethane copolymer is a polyester polyurethane.
Claim 6
Dependent Claim
13 words
The method of claim 2 wherein the urethane copolymer is a polyester polyurethane.
References Cited (Backward Citations)
US4619955A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-09 | 1991-05-11 | 1991-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-09 | 1995-05-11 | 1995-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-09 | 1999-05-11 | 1999-11-10 | $7700.00 | Window Closed / Lapsed |