Silicone release compositions

Details Silicone release compositions Silicone release compositions

1994-10-28

1995-11-21

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

528 15, 528 25, 524482, 524862, 524848, 427387, 556479, C08F28312

Patent

active

054688167

ABSTRACT:
A release modifier which comprises (i) a MQ resin consisting essentially of units of the formulae SiO.sub.2 and R.sub.3 SiO.sub.1/2 wherein R denotes a monovalent hydrocarbon group having up to 3 carbon atoms, a hydrogen atom, a c.sub.2-5 alkenyl group of the formula --R'CH.dbd.CH.sub.2, provided there is at least one group --R'CH.dbd.CH.sub.2 present per MQ molecule and (ii) a .alpha.,.omega.-diolefin having the general formula CH.sub.2 .dbd.CH--(CH.sub.2).sub.n --CH.dbd.CH.sub.2, wherein n denotes an integer with a value of from 4 to 18 gives improved release force over prior art controlled release additives. Also claimed is a solventless release composition based on siloxanes having SiH groups and a catalyst in addition to the release modifier.

REFERENCES:
patent: 4123604 (1978-10-01), Sandford, Jr.
patent: 4472563 (1984-09-01), Chandra et al.
patent: 4526953 (1985-07-01), Dallavia, Jr.
patent: 4533575 (1985-08-01), Melancon
patent: 4741966 (1988-05-01), Cavezzan
patent: 4830924 (1989-05-01), Dallavia, Jr.
patent: 5264499 (1993-11-01), Hayashi et al.

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