Silicone composition and a pressure sensitive adhesive film having a pressure sensitive adhesive layer made from the composition
US10479913B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 2015 |
| Grant date | Nov 19, 2019 |
| Priority date | — |
| Expiry date | Mar 14, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09J2483/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A pressure sensitive adhesive film comprises a substrate film and a pressure sensitive adhesive (PSA) layer formed on a surface of the substrate film. The PSA layer is formed from a silicone composition comprising: a diorganopolysiloxane having at least two alkenyl groups in a molecule and having a viscosity at 25° C. of from 10,000 to 1,000,000 mPa·s; (B) a diorganopolysiloxane having at least one alkenyl group in a molecule, and being raw and rubber-like at 25° C. or having a viscosity at 25° C. of more than 1,000,000 mPa·s; (C) an organopolysiloxane resin represented by the following average unit formula: (R13SiO1/2)x(SiO4/2)1.0, wherein each R1 represents a halogen-substituted or unsubstituted monovalent hydrocarbon group free from an alkenyl group and x is a number from 0.5 to 1.0; (D) an organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms in a molecule; (E) silica fine powder; and (F) a hydrosilylation catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.