| 摘要 |
PROBLEM TO BE SOLVED: To provide a coating agent usable when bonding mutually metals, mutually polyolefins or the metal to the polyolefin etc., and having excellent storage stability at low temperatures. SOLUTION: The coating agent is produced by dissolving or dispersing a propylene-1-butene random copolymer in an organic solvent. The random copolymer is graft modified with a polar monomer, and comprises a unit derived from propylene in an amount of 60-90 mol%, and a unit derived from 1-butene in an amount of 10-40 mol%. Furthermore, the copolymer has≥85% and≤97.5% triad isotacticity determined by<SP>13</SP>C-NMR spectral measurement, the molecular weight distribution (Mw/Mn) determined by GPC (gel permeation chromatography) within the range of 1-3, 0.1-12 dl/g intrinsic viscosity measured in decalin at 135°C, Tm measured by a differential scanning type calorimeter within the range of 40-120°C, and the relationship between the Tm and the content M (mol%) of the 1-butene constituent unit satisfying a specific formula. COPYRIGHT: (C)2009,JPO&INPIT
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