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1. 发明授权

US06310171B1 Resin composition with biodegradability and foamability 失效
标题翻译：具有生物降解性和发泡性的树脂组合物
公开(公告)号：US06310171B1
公开(公告)日：2001-10-30
申请号：US09530480
申请日：2000-04-28
申请人： Hiroshi Naito , Masahiro Yama , Takahiro Kubo , Katsumi Onishi , Tsunahiro Nakae
发明人： Hiroshi Naito , Masahiro Yama , Takahiro Kubo , Katsumi Onishi , Tsunahiro Nakae
IPC分类号： C08G1808
CPC分类号： C08G63/912 , C08G18/4266 , C08G18/4283 , C08G2101/00 , C08G2230/00
摘要： The present invention relates to a resin composition for foam, which is used as a packing cushioning material, and an object thereof is to provide said composition which has biodegradability and is made from a principal raw material, lactic acid capable of contributing to the protection of global environment. The object can be attained by a resin composition having biodegradability and expandability, comprising a high-molecular weight polylactic acid having a melt viscosity of 0.01 to 50 in terms of a melt index value (MI), characterized in that said resin composition is prepared by compounding 0.1 to 5% by weight of at least one compound, which is selected from a polyisocyanate having an isocyanate group of not less than 2.0 equivalents/mol, an epoxy compound having an epoxy group of more than 2.0 equivalents/mol and an acid anhydride having an anhydrous carboxyl group of more than 2.0 equivalents/mol, with a prepolymer made of lactic acid wherein a molar ratio of a L-isomer to a D-isomer is within arange from 95:5 to 60:40 or from 40:60 to 5:95, and reacting the resulting mixture.
摘要翻译：本发明涉及一种泡沫塑料用树脂组合物，其用作填料缓冲材料，其目的在于提供具有生物降解性的组合物，其由主要原料制成，能够有助于保护的乳酸全球环境。该目的可以通过具有生物可降解性和可扩展性的树脂组合物来实现，其包含以熔体指数值（MI）计算的熔体粘度为0.01至50的高分子量聚乳酸，其特征在于所述树脂组合物由配合0.1〜5重量％的至少一种化合物，其选自异氰酸酯基不大于2.0当量/摩尔的多异氰酸酯，环氧基大于2.0当量/摩尔的环氧化合物和酸酐具有大于2.0当量/摩尔的无水羧基与由乳酸制备的预聚物，其中L-异构体与D-异构体的摩尔比在95:5至60:40或40:60之间的范围内至5:95，并使所得混合物反应。

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