Silicone pressure sensitive adhesive compositions having high solids content
US5190827A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 26, 1991 |
| Grant date | Mar 2, 1993 |
| Priority date | — |
| Expiry date | Mar 26, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31663
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A solventless or high solids-containing organopolysiloxane composition curable to produce a pressure sensitive adhesive having high tack and hig peel adhesion, comprising (A) a toluene soluble, resinous copolymer comprising R.sub.3 SiO.sub.1/2 units and SiO.sub.4/2 units; (B) an alkenyl-terminated polydiorganosiloxane having a viscosity of from about 10 to about 500 centipoise at 25.degree. C.; (C) from 0 to about 90 mole % of a hydride-terminated organohydrogenpolysiloxane having a viscosity of from about 10 to about 1000 centipoise at 25.degree. C.; (D) from about 10 to about 100 mole % of a hydrogen-containing polydiorganosiloxane crosslinking agent; the combined average hydride equivalent weight of (C) and (D) being at least 1500 grams/silicon-bonded hydrogen atom; the mole percentages of (C) and (D) being based on the total silicon-bonded hydrogen content of (C) and (D); the total of (B), (C) and (D) being from about 25 to about 50 parts by weight; the total of (A), (B), (C) and (D) being 100 parts by weight; the ratio of silicon-bonded hydrogen atoms in (C) and (D) to olefinically unsaturated radicals in the total of (A) and (B) being in the range of from about 1.1:1 to about…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.