IMPROVED PROCESSABLE RADIATION CURABLE POLY(VINYL CHLORIDE) RESIN COMPOSITIONS

摘要

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 crosslinking 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.