Sacrificial adhesive coatings
US8263720B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2011 |
| Grant date | Sep 11, 2012 |
| Priority date | — |
| Expiry date | Oct 5, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F230/08
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Combinations of solubilized, covalently crosslinked, siloxy-containing polymers in a solvent system of a volatile hydrophobic (non-polar) liquid that is non-stinging to a user are excellent non-irritating liquid coating materials for forming films, which, after solvent evaporation, are water insoluble but water-vapor permeable and lightly adherent to surfaces such as skin and mucous membranes. The crosslinking content is greater than 1 weight % and can be as much as 16 weight %. In comparison to non-crosslinked polysiloxy films, or crosslinked films of 1 weight % or less, the enhanced crosslinked polysiloxy films, while continuing to be soluble in the solvent, have reduced tack and reduced adhesion to skin and can act as sacrificial coatings under strongly adherent pressure sensitive adhesives.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.