US3892903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating surfaces with high solids thermosetting beta-keto ester coating compositions and the resulting coated article
Assignee: PPG Industries Inc
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Filing: 1973-01-11
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Granted: 1975-07-01
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Expires: 1993-01-11
Abstract
Abstract Surfaces are coated with high solids, thermosetting coating compositions which are produced from a reaction product having a plurality of beta-keto ester groups and condensation products of formaldehyde with melamine, urea or benzoguanamine. Reactive copolymers may also be in admixture with the above compositions for co-curing.
Inventors
- 👤 Rostyslaw Dowbenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:47
CPC Classifications
C; C09; C09D; C09D161/00; C09D161/20; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31688; Y10T428/31942
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
82 words
A METHOD O COATING WHICH COMPRISES APPLYING TO A SURFACE A FILM OF A HAT-HARDENING, NONGELLED COATING COMPOSITION HAVING A NONVOLATILE SOLIDS CONTENT OF FROM ABOUT 80 TO ABOUT 100 PERCENT, THE RESINOUS VEHICLE OF SAID COATING COMPOSITION COMPRISING: A. FROM ABOUT 20 TO ABOUT 95 PERCENT BASED ON WEIGHT OF TOTAL REACTION PRODUCT AND CROSS-LINKING AGENT OF A REACTION PRODUCT HAVING A PLURALITY OF BETA-KETO ESTER GROUPS WHEREIN SAID REACTION PRODUCT IS COMPRISED OF A BETA-KETO ESTER HAVING THE GENERAL FORMULA:
Claim 2
Independent Claim
82 words
A METHOD O COATING WHICH COMPRISES APPLYING TO A SURFACE A FILM OF A HAT-HARDENING, NONGELLED COATING COMPOSITION HAVING A NONVOLATILE SOLIDS CONTENT OF FROM ABOUT 80 TO ABOUT 100 PERCENT, THE RESINOUS VEHICLE OF SAID COATING COMPOSITION COMPRISING: A. FROM ABOUT 20 TO ABOUT 95 PERCENT BASED ON WEIGHT OF TOTAL REACTION PRODUCT AND CROSS-LINKING AGENT OF A REACTION PRODUCT HAVING A PLURALITY OF BETA-KETO ESTER GROUPS WHEREIN SAID REACTION PRODUCT IS COMPRISED OF A BETA-KETO ESTER HAVING THE GENERAL FORMULA:
Claim 3
Dependent Claim
9 words
The product produced by the method of claim 1.
Claim 4
Dependent Claim
17 words
The method of claim 1 wherein said beta-keto ester reaction product is represented by the general formula:
Claim 5
Dependent Claim
12 words
The method of claim 1 wherein said reaction product is trimethylolpropane tris(acetoacetate).
Claim 6
Dependent Claim
12 words
The method of claim 1 wherein said reaction product is pentaerythritol tetra(acetoacetate).
Claim 7
Dependent Claim
30 words
The method of claim 1 wherein said crosslinking agent is selected from a member of the class consisting of consisting of condensation products of formaldehyde with melamine, urea or benzoguanamine.
Claim 8
Dependent Claim
13 words
The method of claim 1 wherein said condensation product is alkylated hexamethylol melamine.
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) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |