| 摘要 |
PURPOSE:To provide the titled compsn. having excellent thermal stability and adhesion and suitable for use as a coating agent for optical fiber and a hot-melt adhesive, consisting of a hydrogenated block copolymer, an isopropenyltoluene polymer and an alpha-olefin polymer or squalane. CONSTITUTION:15-40wt% hydrogenated block copolymer (A) obtd. by hydrogenating a block copolymer having a number-average MW of 10,000-1,000,000, composed of 2-60pts.wt. arom. vinyl compd. and 98-40pts.wt. conjugated diene compd. in the presence of a hydrogenation catalyst at 24-320 deg.C under a pressure of an atmospheric pressure to 300 atm., 4-30wt% isopropenyltoluene polymer (B) having a number-average MW of 400-1,600 and a softening point of 90-160 deg.C (ring-and-ball material), obtd. by polymerizing m-isopropenyltoluene alone or an isopropenyltoluene monomer mixture contg. at least 50% m- isopropenyltoluene, and 40-80wt% compd. (C) selected from among an alpha-olefin polymer having a number-average MW of 250-5,000 and squalane, are blended in such a proportion that the combined quantity is 100wt%. |
