<p>A release film comprising an oriented film substrate having an abherent surface layer comprising a chain extended polyurethane resin derived from an isocyanate-reactive polydialkyl siloxane. A preferred substrate is a biaxially oriented polyethylene terephthalate film, and the release film is of particular utility in the production of asphalt roofing materials.</p>
申请公布号
DE68913804(T2)
申请公布日期
1994.07.28
申请号
DE1989613804T
申请日期
1989.05.05
申请人
IMPERIAL CHEMICAL INDUSTRIES PLC, LONDON, GB
发明人
HIGGINS, DAVID EDWARD, COMMONDALE WHITBY NORTH YORKSHIRE, GB