PURPOSE: To obtain an insoluble reaction accelerating agent which is easily separable by transforming a cross-linked polyethylene molded material into a large- surface area body with a swelling method while keeping the original shape, and grafting chloromethyl styrene onto said body.
CONSTITUTION: A cross-linked polyethylene molded material is obtained by treating a polyethylene molded material with γ-ray irradiation, electron-beam irradiation, or other vulcanization, etc. The cross-linked polyethylene molded material is temporarily immersed into a large amt. of a high-boiling point nonpolar solvent such as toluene and xylene, and heated for several hours while agitating gently to swell the material. Then the swollen polymer is separated by filtration, transferred into a large amt. of methanol, agitated, washed repeatedly with methanol, and then air-dried to obtain the large-surface area cross-linked polyethylene. Chloromethyl styrene is grafted onto said polyethylene, and polymerized.
TAODA HIROSHI
YUMOTO TAKAARI
KAWASE TAKAARI
YAMAKITA HIROMI
TAZAWA MASATO
