Organopolysiloxane materials having decreased surface tack

Abstract From the Canadian patent

This invention provides organopolysiloxane materials having cone penetration between about 100 and about 350 (10-1mm) and ultimate elongation of at least 100% and having reduced surface tack. This invention provides three methods of obtaining said materials with reduced surface tack. The first method comprises applying to the surface of such material an organic peroxide or a photoinitiator and irradiating the surface with ultraviolet light to crosslink the surface to reduce or eliminate the tack of the surface. The second method comprises mixing a photoinitiator, such as benzophenone, in an organopolysiloxane fluid thermally crosslinking the organopolysiloxane fluid to produce the material …