Laminate article comprising moisture-curable silicone pressure sensitive adhesive and release liner
AssigneeDow Corning Corporation
InventorsJoseph T. Braun, Virgil J. Johnson, Shawn K. Mealey
Life of this patent
Estimating the term…
Abstract
Moisture-curable silicone pressure sensitive adhesives can be covered with an addition-cured fluorosilicone release coating to provide a releasable laminate. The release force of the laminate is low to moderate and the subsequent adhesion and tack of the adhesive is high and all three values are stable with time. The laminate can be prepared by contacting the release coating with solvent-free or solvent-containing adhesive
Claims14
As an article of manufacture a laminate comprising a layer of moisture-curable silicone pressure sensitive adhesive composition and at least one liner releasably adhered to at least a portion of said layer;
- said moisture-curable silicone pressure sensitive adhesive comprising a homogeneous mixture of
- (A) a silanol-free silicone pressure sensitive adhesive component selected from the group consisting of a mixture of an organopolysilioxane resin with a polydiorganosiloxane gum and a bodied product thereof wherein at least one of said organopolysilioxane resin, said polydiorganosiloxane gum or said bodied product bears curing radicals having the formula R.sub.b (OR').sub.3-b SiZ-and capping radicals having the formula R.sub.3 SiO-wherein Z denotes a divalent radical linking the silicon atom of the curing radical to a silicon atom of the silicone pressure sensitive adhesive component, R denotes a monovalent hydrocarbon radical, R' denotes an alkyl or alkoxyalkyl radical, and the subscript b has a value of 0 or 1;
- all other silicon-bonded radicals of the silicone pressure sensitive adhesive component being selected from the group consisting of divalent oxygen atoms linking silicon atoms, hydrogen atoms and monovalent hydrocarbon radicals;
- (B) an effective amount of a catalyst component to accelerate the reaction of the curing radicals with moisture to form siloxane bonds;
- and, optionally,
- (C) an effective amount of a silicon compound bearing a plurality of silicon-bonded alkoxy radicals to improve the shelf life of the adhesive.
Dependencies are inferred from the claim text.