Controlled release coating comprising blend of silicone polymer and adhesion promoter
US6020412A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1997 |
| Grant date | Feb 1, 2000 |
| Priority date | — |
| Expiry date | Dec 4, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09J2483/005
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A reclaimable release coating composition is provided which includes a blend of an adhesion promoter and a silicone release agent which may be applied from an aqueous solution, dispersion or emulsion. The components form regions of adhesion promoting sites disrupted by regions of release sites on the surface of a release backing substrate coated with the composition. The different regions are substantially homogeneously distributed across the entirety of the release surface. When used as a release coating for a backing to protect an adhesive, a controlled release force of a predictable value may be obtained by providing a known weight ratio of adhesion promoter to silicone release agent in the coating composition. A substantially linear relationship is also provided between the release force required to peel a non-silicone adhesive from the release coating surface, and the weight ratio of vinyl-functional polyorganosiloxane oil to hydrogen-functional siloxane crosslinker in the release agent, such that a consistent, uniform and repeatable release force from the surface may be obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.