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    • 1. 发明专利
    • Polylactic acid-based adhesive and method for producing the same
    • 基于聚酯酸的粘合剂及其制造方法
    • JP2011252102A
    • 2011-12-15
    • JP2010127750
    • 2010-06-03
    • Konishi Co LtdOsaka Municipal Technical Research Instituteコニシ株式会社地方独立行政法人 大阪市立工業研究所
    • KADOTA JOJIAGARI YASUYUKIHIRANO HIROSHIARISAWA AKIZO
    • C09J167/04C08G63/08C08L101/16
    • PROBLEM TO BE SOLVED: To provide a polylactic acid-based adhesive in which a specific branched polylactic acid is used and thereby, high molecules of the polylactic acid tend to entwine with one another, and which has high adhesive strength and excellent biodegradability, and to provide a method for producing the same.SOLUTION: The polylactic acid-based adhesive contains a three- or four-branched polylactic acid, represented by specific chemical formula and having a number average molecular weight of ≥40,000. It is preferable that the ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn), Mw/Mn, is within the range of 1.07 to 1.16. The method for producing the adhesive is characterized by obtaining a polylactic acid by polymerizing a lactide in the presence of a polymerization catalyst and a tetrahydric or trihydric alcohol, and then dispersing or dissolving the polylactic acid into a solvent. It is preferable that the polymerization catalyst is composed of 4-dimethylaminopyridine and 4-dimethylaminopyridinium triflate, the tetrahydric alcohol is pentaerythritol, and the trihydric alcohol is trimethylolpropane.
    • 要解决的问题:为了提供使用特定支化聚乳酸的聚乳酸类粘合剂,因此聚乳酸的高分子倾向于相互缠结,并且具有高粘合强度和优异的生物降解性 并提供其制造方法。 解决方案:聚乳酸类粘合剂含有由特定化学式表示的数均分子量≥40,000的三支或四支支化聚乳酸。 优选重均分子量(Mw)与数均分子量(Mn)的比Mw / Mn在1.07〜1.16的范围内。 粘合剂的制造方法的特征在于,通过在聚合催化剂和四元或三元醇的存在下聚合丙交酯,然后将聚乳酸分散或溶解到溶剂中来获得聚乳酸。 聚合催化剂优选由4-二甲基氨基吡啶和4-二甲基氨基吡啶鎓三氟甲磺酸酯组成,四元醇为季戊四醇,三元醇为三羟甲基丙烷。 版权所有(C)2012,JPO&INPIT