申请人:MINNESOTA MINING AND MANUFACTURING COMPANY
公开号:EP0132032A2
公开(公告)日:1985-01-23
This invention relates to radiation-curable poly(vinyl chloride) resin compositions that can be processed to form shaped articles, coatings, and films. Poly(vinyl chloride) resins are generally characterized by low impact strength. To remedy this shortcoming, radiation curing of compositions of poly(vinyl chloride) resins containing various plasticizers and crosslinking agents has been utlized. However, certain cross- linking agents cause radiation-cured poly(vinyl chloride) resins to become cloudy and exude oily materials upon storage.
It has been discovered that poly(vinyl chloride) resin compositions containing an ethylenically-unsaturated compound having carbonylamino or thiocarbonylamino groups are readily convertible at low temperatures to crosslinked polymers and are radiation-curable to dimensionally stable articles and films that are clear and that do not exude oily materials.
The cured poly(vinyl chloride) resin compositions of the invention are useful in the form of such shaped articles as self-supporting films, foils, and sheets and as coatings. The compositions of this invention are particularly useful as a sheet for a tape support for an adhesive and as coating compositions for substrates such as wire and flat cable insulation.
本发明涉及辐射固化聚(氯乙烯)树脂组合物,该组合物可加工成成型物品、涂层和薄膜。聚氯乙烯树脂通常具有冲击强度低的特点。为了弥补这一缺陷,人们利用辐射固化含有各种增塑剂和交联剂的聚氯乙烯树脂组合物。然而,某些交联剂会导致辐射固化的聚氯乙烯树脂在储存时变得浑浊并渗出油状物。
现已发现,含有一种具有羰基氨基或硫代羰基氨基的乙烯基不饱和化合物的聚氯乙烯树脂组合物在低温下很容易转化为交联聚合物,并通过辐射固化成尺寸稳定、透明且不渗出油性物质的物品和薄膜。
本发明的固化聚氯乙烯树脂组合物可用于自支撑薄膜、箔和片材等形状的物品以及涂层。本发明的组合物尤其可用作粘合剂的胶带支撑片材,以及电线和扁平电缆绝缘层等基材的涂层组合物。