Basic liquid composition suitable for producing transparent coatings or varnishes on solid surfaces, process for preparation of such varnishes, and varnishes produced thereby
US4485130A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 1983 |
| Grant date | Nov 27, 1984 |
| Priority date | — |
| Expiry date | Mar 8, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D183/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The basic composition comprises, in solution in at least one organic solvent, with or without water, from 10 to 40% of a hard-enable organosilicic compound resulting from a first hydrolysis reaction achieved at a temperature lower than 50.degree. C. in the presence of a carboxylic acid and water on at least one R'Si(OR).sub.4 alkoxysilane with n=1 or 2, in association or without association with at least one Si(OR").sub.4 -alkoxysilane, then, a second hydrolysis at a temperature lower than 40.degree. C. after removal of the formed volatile solvents and addition of a less volatile solvent and at least one R"'Si(OR.sub.1).sub.3 -alkoxysilane, said reaction being followed with the setting of the pH to between 3.5 and 5.5 by an organic base.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.