US5296530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for light-assisted curing of coatings
Assignee: Rohm and Haas Co
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Filing: 1992-07-28
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Granted: 1994-03-22
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Expires: 2012-07-28
Abstract
Abstract This invention relates to a method for light-assisted curing of coatings by providing coatings with an enamine content sufficient to enhance the cure rate of the coatings. The coatings exhibit improved weatherability and gloss retention when exposed to light.
Inventors
- 👤 Daniel A. Bors
- 👤 William D. Emmons
- 👤 Steven S. Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:53
CPC Classifications
C; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C09D133/10; C09D133/14; B; B05; B05D; B05D3/00; B05D3/06; B05D3/061; B05D3/065; B05D7/00; B05D7/24; C08; C08F; C08F8/00; C08F8/44; C09D157/00; C09D157/06; C09D157/12; C09D7/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31942
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A process of preparing an aqueous coating composition for application to substrates which are exposed to ultraviolet light comprising: a) mixing a vinyl polymer having acetoacetyl functional groups with an amount of ammonia or primary amine sufficient to convert the acetoacetyl groups to enamine, b) storing the mixture for a period sufficient to allow the reactants to equilibrate, c) adding a sufficient amount of ammonia or primary amine to raise the pH to about 9, and d) maintaining the pH at about 9 until the coating is applied to the substrate.
Claim 2
Dependent Claim
91 words
A process of preparing an aqueous coating composition for application to substrates which are exposed to ultraviolet light comprising: a) mixing a vinyl polymer having acetoacetyl functional groups with an amount of ammonia or primary amine sufficient to convert the acetoacetyl groups to enamine, b) storing the mixture for a period sufficient to allow the reactants to equilibrate, c) adding a sufficient amount of ammonia or primary amine to raise the pH to about 9, and d) maintaining the pH at about 9 until the coating is applied to the substrate.
References Cited (Backward Citations)
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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) | 1997-03-21 | 1997-09-20 | 1998-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-21 | 2001-09-20 | 2002-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-21 | 2005-09-20 | 2006-03-22 | $7700.00 | Window Closed / Lapsed |