US2727870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified alkyd resins
Assignee: Rohm and Haas Co
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Filing: 1953-03-04
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Granted: 1955-12-20
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Expires: 1973-03-04
Abstract
No abstract record available.
Inventors
- 👤 Ellington M Beavers
- 👤 Richard S Urban
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:30
CPC Classifications
C; C09; C09D; C09D151/00; C09D151/08; C08; C08F; C08F283/00; C08F283/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A PROCESS FOR PREPARING MODIFIED ALKYD RESINS WHICH COMPRISES HEATING AND POLYMERIZING, IN SOLUTION AT A TEMPERATURE ABOVE ABOUT 100* C. AND IN THE PRESENCE OF A POLYMERIZATION CATALYST, A MIXTURE OF STYRENE, METHYL METHACRYLATE AND A PRE-FORMED ALKYD RESIN, THE STYRENE AND METHYL METHACTYLATE BEING PRESENT IN A RATIO TO EACH OTHER OF 3:1 TO 1:3 AND IN A COMBINED AMOUNT EQUAL TO 35 TO 45% OF THE TOTAL WEIGHT OF SAID MIXTURE, AND SAID ALKYLD RESIN HAVING AN ACID NUMBER LESS THAN 25 AND BEING OTHER PRODUCT OF REACTING (A) PHTHALIC ANHYDRIDE, (B) A POLYHYDRIC ALCOHOL CONTAINING 3 TO 6 HYDROXYL GROUPS, AND (C) A MEMBER OF THE CLASS CONSISTING OF DEHYDRATED CASTOR OIL AND THE FATTY ACIDS OF DEHYDRATED CASTOR OIL, THE AMOUNT OF PHTHALIC ANHYDRIDE BEING 22-26% OF THE TOTAL WEIGHT OF THE MATERIALS (A), (B) AND (C).
Claim 2
Dependent Claim
142 words
A PROCESS FOR PREPARING MODIFIED ALKYD RESINS WHICH COMPRISES HEATING AND POLYMERIZING, IN SOLUTION AT A TEMPERATURE ABOVE ABOUT 100* C. AND IN THE PRESENCE OF A POLYMERIZATION CATALYST, A MIXTURE OF STYRENE, METHYL METHACRYLATE AND A PRE-FORMED ALKYD RESIN, THE STYRENE AND METHYL METHACTYLATE BEING PRESENT IN A RATIO TO EACH OTHER OF 3:1 TO 1:3 AND IN A COMBINED AMOUNT EQUAL TO 35 TO 45% OF THE TOTAL WEIGHT OF SAID MIXTURE, AND SAID ALKYLD RESIN HAVING AN ACID NUMBER LESS THAN 25 AND BEING OTHER PRODUCT OF REACTING (A) PHTHALIC ANHYDRIDE, (B) A POLYHYDRIC ALCOHOL CONTAINING 3 TO 6 HYDROXYL GROUPS, AND (C) A MEMBER OF THE CLASS CONSISTING OF DEHYDRATED CASTOR OIL AND THE FATTY ACIDS OF DEHYDRATED CASTOR OIL, THE AMOUNT OF PHTHALIC ANHYDRIDE BEING 22-26% OF THE TOTAL WEIGHT OF THE MATERIALS (A), (B) AND (C).
References Cited (Backward Citations)
GB609749A
Cited
US2580289A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-19 | 1959-06-20 | 1959-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-19 | 1963-06-20 | 1963-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-19 | 1967-06-20 | 1967-12-20 | $7700.00 | Window Closed / Lapsed |