Silicone pressure-sensitive adhesives
US5366809A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 1993 |
| Grant date | Nov 22, 1994 |
| Priority date | — |
| Expiry date | Sep 2, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31667
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A silicone pressure-sensitive adhesive composition having high adhesion and tack while having a high percentage of adhesive failure when peeled from substrates is disclosed, said composition consisting essentially of PA1 (A) 50 to 80 parts by weight of an MQ organopolysiloxane resin; PA1 (B) 20 to 50 parts by weight of a polydiorganosiloxane having at least 3 alkenyl groups in its molecule, with the proviso that the alkenyl group content of said polydiorganosiloxane is 0.1 to 4 mole percent, the total amount of components (A) and (B) being 100 parts by weight; PA1 (C) an organohydrogenpolysiloxane crosslinking agent having, on average, at least 3 SiH groups per molecule, the amount of said organohydrogenpolysiloxane being sufficient to provide a molar ratio of said SiH groups of component (C) to said alkenyl groups of component (B) in the range of 0.1 to <1.0; and PA1 (D) a curing amount of a hydrosilation catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.