Coating compositions
US8591999B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2009 |
| Grant date | Nov 26, 2013 |
| Priority date | — |
| Expiry date | Aug 26, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC14C11/003
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention relates to coatings for leather. In particular it relates to top coats for leather. It provides a leather coating composition comprising an organic synthetic resin in aqueous dispersion and an organopolysiloxane, characterized in that the organopolysiloxane is present in aqueous emulsion and comprises a silicone resin having an empirical formula: (I) where •R is a monovalent organic group having 1-30 carbon atoms, •Z is hydrogen or an alkyl group having 1-4 carbon atoms, •x has a value from 0.75 to 1.7, and •y has a value from 0.1 to 2.0, and having a viscosity of from 1 to 4000 mPa·s at 25° C. We have found that the use of a silicone resin according to the invention greatly increases the abrasion resistance, as measured by the Taber method, of leather coated with the coating composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.