Chemically thickened polyester resin
Abstract
Abstract THE VISCOSITY OF UNSATURATED POLYESTER RESINS FORMED BY MIXING THE CONDENSATION POLYMERS OF UNSATURATED DICARBOXYLIC ACIDS AND DIHYDRIC ALCOHOLS IN ETHYLENICALLY UNSATURATED COPOLYMERIZABLE MONOMERS MAY BE GREATLY INCREASED BY ADDING (1) A MIXTURE OF CALCIUM OXIDE AND EITHER CALCIUM HYDROXIDE OR MAGNESIUM OXIDE, AND (2) AN ORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF BENZOIC ACID, CYCLOHEXANE CARBOXYLIC ACID, CINNAMIC ACID AND P-HYDROXYBENZOIC ACID TO THE UNSATURATED POLYESTER RESINS. THE VISCOSITY OF THE COMPOSITION IS INTIALLY LOW ENOUGH SO THAT FIBROUS REINFORCEMENTS CAN BE IMPREGNATED WITH THE RESIN COMPOSITION AND THE LOW VISCOSITY PERMITS THE RESIN TO WET THE FIBERS, THEREAFTER THE VISCOSITY OF THE RESIN INCREASES AND THE FIBROUS REINFORCED MASS LOSES ITS TACKINESS AND CAN BE EASILY STORED AND HANDED.
Inventors
- 👤 M Baum
- 👤 J Hatton
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |