| 摘要 |
<p>PROBLEM TO BE SOLVED: To achieve excellent adherence to various plastics including polyolefin by using a polyurethane resin produced by using a piperazine derivative as a chain extender and/or a polymerization terminator as an essential component. SOLUTION: A polyurethane resin is used which is produced by using a compound represented by formula I as a chain extender and a compound represented by formula II [in the formulas I and II, X1 and X2 are each H or a 1-3C amino alkyl (at least one of X1 and X2 is not H); Y1 is H or a 1-3C amino alkyl; Y2 is a 1-3C alkyl or a 1-3C hydroxyalkyl] as a polymerization terminator. Usually, the compound represented by formula I, when the compound represented by formula II is not used, is used at least 5 wt.% to the amount of the chain extender and the compound represented by formula II, when the compound represented by formula I is not used, is used at least 20 wt.% to the amount the polymerization terminator. When the both compounds represented by formulas I and II are used, the compounds are usually used at least 3% of the sum total of the chain extender and the polyerization terminator.</p> |
