| 摘要 |
PROBLEM TO BE SOLVED: To provide a composition for adhesives having tough adhesive force, maintaining the adhesive force for a long time and keeping good appearance after curing.SOLUTION: There is provided a composition for adhesives containing a polyester polyol (a), a polycarbonate diol (b) and a polyisocyanate (c), wherein the component (b) is a polycarbonate diol having a repeating unit expressed by formula (A) and terminal hydroxyl group, 60-100 mol% of the repeating unit expressed by formula (A) has 5 (B) and 6 (C) carbons, the ratio of (B) and (C) is 70:30 to 30:70 (molar ratio) and the ratio of primary terminal OH is 95-99.5%. In the formula, R is 2-15C bivalent aliphatic or alicyclic hydrocarbon group. |
