Process for providing uniform organopolysiloxane coatings on polycarbonate and acrylic surfaces
Abstract
Abstract PROCESS, AND THE ARTICLE PRODUCED THEREBY, FOR PROVIDING A UNIFORMLY AND TENACIOUSLY ADHERED, HARD, ACETONE-RESISTANT AND MAR-RESISTANT COATING ON ARTICLES HAVING A SOLID POLYCARBONATE OR ACRYLIC SURFACE. THE PROCESS INCLUDES PRIMING THE POLYMERIC SURFACE WITH AN ADHESION PROMOTING, THERMOSETTABLE ACRYLIC BY FORMING A THIN FILM THEREON, THEN COATING THE PRIMED SURFACE WITH A SOLUTION OF A PRECURED SOLVENT-SOLUBLE, FURTHER-CURABLE ORGANOPOLYSILOXANE IN AN ORGANIC SOLVENT AND THEREAFTER EVAPORATING THE SOLVENT AND FINALLY CURING THE ORGANOPOLYSILOXANE TO A THERMOSET CONDITION. THE SOLVENT-SOLUBLE, FURTHER-CURABLE ORGANOPOLYSILOXANE IS PRODUCED BY HEATING METHYLTRIALKOXYSILANE, PHENYLTRIALKOXYSILANE OR MIXTURES THEREOF AND WATER IN THE PRESENCE OF AN EFFECTIVE CATALYTIC AMOUNT OF A HYDROLYSIS CATALYST, E.G., HCL, AT A SUFFICIENT TEMPERATURE AND FOR A TIME SUFFICIENT TO FORM A PARTIAL CONDENSATION PRODUCT, CONCENTRATING THIS PRODUCT BY HEATING TO REMOVE SOME ALKANOL BY-PRODUCT AND WATER AND THEREAFTER PRECURING THE PRODUCT BY HEATING BELOW THE GEL POINT THEREOF.
Inventors
- 👤 Donald W Gagnon
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |