Heat-curable epoxide resin compositions
Abstract
Abstract HEAT-CURABLE EPOXIDE RESIN MIXTUREES OF (1) A CYCLOALIPHATIC POLYGLYCIDYL COMPOUND WHICH POSSESSES AT LEAST ONE ALICYCLIC FIVE-MEMBERED OR SIX-MEMBERED RING, (2) A POLYCARBOXYLIC ACID ANHYDRIDE (0.2-1.1 ANHYDRIDE GROUPS PER 1 EQUIVALENT OF EPOXIDE GROUPS) AND (3) A POLYESTER CONTAINING TERMINAL CARBOXYL GROUPS AND/OR HYDROXYL GROUPS, WHICH IS OBTAINED BY ESTERIFICATION OF ALIPHATIC-CYCLOALIPHATIC HIGHER DICARBOXYLIC ACIDS (MANUFACTURED BY DIMERIZATION OF UNSATURATED MONOMERIC FATTY ACID WITH 14-24 CARBON ATOMS IN THE MOLECULE, PREFERABLY 16-18, AND OPTIONALLY SUBSEQUENT HYDROGENATION OF SUCH A DIMERIC FATTY ACID) WITH ALIPHATIC DIOLS (0.02-0.4 MOL OF POLYESTER PER 1 EQUIVALENT OF EPOXIDE GROUPS). THE CURING OF THE MIXTURE YIELDS FLEXIBLE, IMPACT-RESISTANT MOULDINGS THE PHYSICAL PROPERTIES OF WHICH SHOW LITTLE TEMPERATURE-DEPENDENCE, AND WHICH POSSESS HIGH FLEXIBILITY AT LOW TEMPERATURES.
Inventors
- 👤 Rolf Schmid
- 👤 Friedrich Lohse
- 👤 Willy Fisch
- 👤 Hans Batzer
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 |
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| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |