Elastic thermoplastic polymer composition

Abstract

Abstract PURPOSE: To obtain the title composition suitable for melt processing, by adding an organic peroxide to a melt blend consisting of a butyl rubber, an ethylene-propylene copolymer rubber, and an ethylene-vinyl acetate copolymer, blending the system under heating, and then carrying out partial curing. CONSTITUTION: The objective composition with desired melt viscosity can be obtained by adding 0.1W0.5 part by wt. of an organic peroxide (e.g., t-butyl perbenzoate) at a temperature below its decomposition temperature to 100 parts by wt. of a melt blend consisting of ≥50wt% of an ethylene-vinyl acetate copolymer, a butyl rubber, and an ethylene-propylene copolymer rubber, and then carrying out blending the system under heating followed by partial curing by a radical reaction. USE: Hot melt adhesives and sealants, with addition of a low-temperature brittleness inhibitor (adding 5W50wt%) and a stickiness-imparting agent. COPYRIGHT: (C)1980,JPO&Japio

Inventors

• 👤 Kazuo Saotome

Bibliographic Details