Siliconized polyester thermosetting coating compositions
US4370441A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 1981 |
| Grant date | Jan 25, 1983 |
| Priority date | — |
| Expiry date | May 29, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D183/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Pigmented thermosetting organic solvent solution coating compositions are disclosed which cure to provide improved weather resistance. These coating compositions contain three resin components, as follows: PA1 1- an essentially nonfunctional organic solvent-soluble silicone resin reaction product of a highly branched, low molecular weight hydroxy function polyester with an hydroxy or alkoxy-functional organic polysiloxane, the polysiloxane constituting from 8% to 20% of the three resin components, and the polyester and the polysiloxane being combined in approximately stoichiometric proportions; PA1 2- a reactive organic solvent-soluble essentially linear high molecular weight hydroxy functional polyester constituting the balance of the three resin components; and PA1 3- from 3% to 15% of the three resin components of a heterocyclic aminoplast resin for curing the reactive polyester. Components 1 and 2 are compatible in the solution and at least partially incompatible in a film as the solvent evaporates, so that component 1 can concentrate at the surface to enhance the weather resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.