| 摘要 |
PROBLEM TO BE SOLVED: To obtain a coating agent which, when used as an adhesive, forms a nontacky coating film especially excellent in low-temperature heat sealability and, when used as a coating material, provides a good adhesion to polyolefins by dissolving or dispersing, in an organic solvent, a propylene elastomer graft- modified with a polar monomer. SOLUTION: The propylene elastomer comprises 50-95 mol% propylene units and 5-50 mol% 1-butene units and has an intrinsic viscosity (measured in decalin at 135 deg.C) of 0.1-12 dl/g, a mol.wt. distribution Mw/Mn (measured by gel permeation chromatography) of 3 or lower, and a parameter B (a randomness of comonomer chain distribution) of 1.0-1.5. A polar monomer in an amount of 0.1-15 wt.% is grafted onto the propylene elastomer. Unsaturated carboxylic acids and their anhydrides are preferable as the polar monomer.
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