| 摘要 |
<p>Substantially branched alkenyl silicone polymer compositions having on average at least two branching points per molecule are coated on a substrate. The cured coated compositions provide improved release properties against methyl and phenyl silicone pressure sensitive adhesives. The coated release substrate comprising a substrate layer, the cured release coating and a methyl or phenyl silicone pressure sensitive adhesive is useful as transfer tape or sheet facilitating the transfer of the pressure sensitive adhesive from the substrate comprising the cured release coating to a second substrate which may be a single layer of material or a laminate comprising two or more layers. These releasable compositions may be used in devices where a release layer is desired such as transdermal patches, band-aids and other medical appliances. A laminate may be formed by contacting one or a plurality of layers with that side of the coated substrate carrying said pressure sensitive adhesive. The materials useful as the substrate layer and as the layer or layers in contact with the pressure sensitive adhesive are selected from the group consisting of cellulose based substrates such as paper, film based substrates such as polyolefin films, polyester films, polyamide films and polyurethane films, and cellulose based substrates that have been coated with film forming materials derived from polyolefins, polyesters, polyamides and polyurethanes.</p> |
