Patent ID: 9096721
Filing Date: 2015-08-04
Classification: C08G,C08L,C09D

Abstract:
1. A method of making a controlled release composition for medical or pharmaceutical use comprising preparing a spreadable formulation containing an active agent X and a vehicle Y, said vehicle Y comprising a curable silicone composition comprising components (a), (d) and at least one of (b) or (c): a) a polyorganosiloxane resin, composed of M and Q units having at least 3 alkenyl groups per molecule, herein after called “SiVi” groups, b) a polyorganosiloxane compound having at least 2 Si-bonded hydrogen groups on the polysiloxane chain, hereinafter called “SiH” groups, c) a telechelic polyorganosiloxane compound having terminal Si—H groups, and d) a hydrosilylation catalyst for the reaction of SiH groups with SiVi groups, e) in the presence of a liquid diluent in an amount of from 0 to maximum 40% by weight of the composition wherein the components react together by hydrosilylation at a temperature below 40° C. when they are brought into contact on a substrate and cure to form a continuous film on the substrate.