Method for producing a thermally expandable vinyl chloride resin material and thermally expandable vinyl chloride resin material

摘要

The present invention obtained effectively exhibit the shutdown function of the flame and smoke in the low temperature range, heat-expandable vinyl chloride resin composition inflatable member is excellent in shape retention and mechanical strength after swelling and which thermal provision of intumescent sheet usingTo A vinyl chloride resin base to become, a plasticizer for the resin and expandable graphite and flame retardants, will further contain the de-hydrochloric acid catalyst of the vinyl chloride resin, hydrochloric acid catalyst , the 15 minutes at 180 C. the sample a containing a plasticizer was added 10 parts by weight of the vinyl chloride resin 100 parts by mass, then when heated 15 minutes at 190 C., the weight loss of the sample a is 25 mass % or more and is composed of material, and the range of the added amount of the substance is, for the sample B containing a plasticizer was added to the vinyl chloride resin 100 parts by weight, 15 minutes at 180 , then at 190 after heating for 15 minutes, heat-expandable vinyl chloride resin composition is within the weight loss of the sample B is 25 mass% or moreBACKGROUND