CURABLE LAMINATED PRODUCT OF EPDM ELASTIC PRODUCT AND POLYMER CONTAINING ETHYLENE

摘要

PURPOSE: To provide a sheet or film material having both of durability and seaming properties and useful for covering a roof of a building structure. CONSTITUTION: Each layer has at least two layers containing a blend of (a) 50-80 wt.% ethylene/propylene/non-conjugated diene elastomer and (b) 20-50 wt.% ethylene-containing polymer selected from a group consisting of polyethylene, an ethylene/α-monoolefin copolymer with a 3-12C monoolefin content of 2-8 wt.% and an ethylene/vinyl acetate copolymer with a vinyl acetate content of about 10 wt.% and respective alternate layers contain either one of elemental sulfur or a curing accelerator as a crosslinking agent to an elastomer. When a laminate is exposed to raised temp., the elemental sulfur and accelerator in the respective layers are moved to the adjacent layers and the elastomer in the laminated product is succeedingly cured and the laminated product is useful in the adaption to a roof.