Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1995-06-07
1998-10-06
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...
525100, 528 29, C08G 6348
Patent
active
058177175
ABSTRACT:
The present invention relates to crosslinkable or crosslinked silicone compositions capable of being employed especially for forming an abherent coating or film for a fibrous or other support, for example made of paper or the like, or made of natural or synthetic polymer (film). One of the essential objectives of the invention is to provide a crosslinkable or crosslinked silicone composition which provides a satisfactory solution to the abherence/printability dilemma, traditionally encountered in abherent silicone coatings. This objective and others are attained by the composition of the invention, including at least one polyorganosiloxane and at least one polyvinyl alcohol corresponding to the following specifications: ester value (E.V.) higher than or equal to 80, preferably 100 and still more preferably between 120 and 200, and standard dynamic viscosity (.eta..sub.dt) lower than 12 mPa s and preferably lower than 10 mPa s, the dry weight ratio of the polyorganosiloxane fraction to the PVA fraction being established between 0.5 and 10, preferably between 1 and 5 and still more preferably between 1.5 and 3.5.
REFERENCES:
patent: 4617239 (1986-10-01), Maruyama et al.
English Abstracts for 0 169 098, 24 49 085 and 0 307 578.
One-page French Search Report.
Lievre Andre
Mirou Christian
Marquis Melvyn I.
Rhone-Poulenc Chimie
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