US2604457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Styrene-acrylic acid copolymers reacted with polymeric 4-vinylcyclohexene diepoxide
Assignee: PPG Architectural Coatings Canada Inc
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Filing: 1951-05-31
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Granted: 1952-07-22
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Expires: 1971-05-31
Abstract
No abstract record available.
Inventors
- 👤 Segall Gordon Hart
- 👤 Dixon John Francis Clemow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:44
CPC Classifications
C; C09; C09D; C09D125/00; C09D125/02; C09D125/04; C09D125/08; C08; C08L; C08L23/00; C08L23/26; C08L23/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A PROCESS FOR THE PREPARATION OF THERMOSET, INFUSIBLE, SOLVENT INSOLUBLE POLYMERS OF STYRENE, WHICH COMPRISES HEATING A THERMOPLASTIC, FUSIBLE, SOLVENT SOLUBLE COPOLYMER OF MORE THAN 50 PARTS OF STYRENE AND AT LEAST 12.5 PARTS OF AN ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID AND METHACRYLIC ACID AND AT LEAST 5 PARTS OF ANOTHER POLYMERIZABLE MONOETHYLENICALLY UNSATURATED COMPOUND HAVING THE ETHYLENIC GROUP AS SOLE REACTIVE GROUP, THE TOTAL PARTS BEING 100, WITH LINEAR POLYMERIC 4-VINYLCYCLOHEXENE DIEPOXIDE AT A TEMPERATURE OF ABOUT 150* C. IN THE PRESENCE OF AT LEAST 0.5%, BY WEIGHT OF THE COPOLYMER, OF AN AMINO CATALYST, THE PROPORTION OF POLYMERIC DIEPOXIDE TO COPOLYMER BEING SUCH THAT ONE EPOXIDE GROUP IS PRESENT FOR EACH FREE CARBOXYLIC ACID GROUP OF THE COPOLYMER.
Claim 2
Dependent Claim
124 words
A PROCESS FOR THE PREPARATION OF THERMOSET, INFUSIBLE, SOLVENT INSOLUBLE POLYMERS OF STYRENE, WHICH COMPRISES HEATING A THERMOPLASTIC, FUSIBLE, SOLVENT SOLUBLE COPOLYMER OF MORE THAN 50 PARTS OF STYRENE AND AT LEAST 12.5 PARTS OF AN ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID AND METHACRYLIC ACID AND AT LEAST 5 PARTS OF ANOTHER POLYMERIZABLE MONOETHYLENICALLY UNSATURATED COMPOUND HAVING THE ETHYLENIC GROUP AS SOLE REACTIVE GROUP, THE TOTAL PARTS BEING 100, WITH LINEAR POLYMERIC 4-VINYLCYCLOHEXENE DIEPOXIDE AT A TEMPERATURE OF ABOUT 150* C. IN THE PRESENCE OF AT LEAST 0.5%, BY WEIGHT OF THE COPOLYMER, OF AN AMINO CATALYST, THE PROPORTION OF POLYMERIC DIEPOXIDE TO COPOLYMER BEING SUCH THAT ONE EPOXIDE GROUP IS PRESENT FOR EACH FREE CARBOXYLIC ACID GROUP OF THE COPOLYMER.
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) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |