专利名称：Release coatings for dielectric substrates发明人：Patricia J. A. Brandt,Paul J. Wang,Raymond J.
Farm
申请号：US07/483658申请日：19900223公开号：US05045391A公开日：19910903
摘要：Disclosed are image release sheets which comprise a dielectric coated substrateand a silicone-urea block polymer coating for the dielectric substrate. The silicone-ureablock polymer functions as a release coating when the image sheet is used inelectrographic processes. Excellent transfer of an image from a donor element,
comprising the silicone-urea block polymer as a release coating, to a receptor substrateoccurs. In a preferred embodiment, a pH sensitive indicator such as thymolphthalein canbe added to the release coating in order to monitor the thickness of the coating.
申请人：MINNESOTA MINING AND MANUFACTURING COMPANY
代理人：Gary L. Griswold,Walter N. Kirn,Carolyn V. Peters
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