Varnish and a method of coating plastic with polyvinylidene fluoride
US4416925A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 24, 1981 |
| Grant date | Nov 22, 1983 |
| Priority date | — |
| Expiry date | Aug 24, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2427/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
For the coating of plastics with polyvinylidene fluoride, finely divided polyvinylidene fluoride is dispersed in a solvent mixture of PA0 (a) at least one high-boiling, organic solvent with a boiling point up to 250.degree. C., which dissolves polyvinylidene fluoride little or not at all, and PA0 (b) at least one strongly polar latent organic solvent for polyvinylidene fluoride, the dispersion obtained is dissolved in PA0 (c) at least one low-boiling polar organic solvent with a boiling point up to 120.degree. C., the plastic surface is coated with the solution and the latter is baked on at a temperature of 100.degree. to 300.degree. C. A bake-on varnish suitable for the method contains, for example: PA0 3 to 25 wt.-% of polyvinylidene fluoride, 5 to 20 wt.-% of at least one high-boiling organic solvent with a boiling point up to 250.degree. C., PA0 1 to 10 wt.-% of at least one strongly polar latent organic solvent for polyvinylidene fluoride and 60 to 90 wt.-% of a low-boiling polar organic solvent with a boiling point up to 120.degree. C., as well, if desired, as conventional ultraviolet light absorbers and/or additive resins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.