专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

WO2010044112A8 PROCESS FOR CONTROLLED DEGRADATION OF POLYHYDROXYALKANOATES AND PRODUCTS OBTAINABLE THEREFROM 审中-公开
标题翻译：控制降解聚羟基烷酸酯的方法及由此得到的产品
公开(公告)号：WO2010044112A8
公开(公告)日：2010-06-24
申请号：PCT/IT2008000646
申请日：2008-10-15
申请人： UNIV BOLOGNA ALMA MATER , INST OF POLYMERS AND CARBON MA , SCANDOLA MARIASTELLA , MAZZOCCHETTI LAURA , FOCARETE MARIA LETIZIA , KAWALEC MICHAL , KURCOK PIOTR , ADAMUS GRAZYNA , KOWALCZUK MAREK
发明人： SCANDOLA MARIASTELLA , MAZZOCCHETTI LAURA , FOCARETE MARIA LETIZIA , KAWALEC MICHAL , KURCOK PIOTR , ADAMUS GRAZYNA , KOWALCZUK MAREK
IPC分类号： C08G63/06 , C08G63/91
CPC分类号： C08G63/912 , C08G63/06
摘要： The present invention relates to a process for producing polyhydroxyalkanoate oligomers and/or polymers of reduced molecular weight, which comprises reacting at least one polyhydroxyalkanoate (PHA) with at least one carbonate salt at a temperature of from 50°C to 300°C, preferably from 120°C to 200°C. The above reaction allows a controlled degradation of the PHA chains which yields oligomers and/or polymers having a controlled molecular weight, which can be modulated in view of the specific application for which the oligomers and/or polymers are intended. Moreover, during the reaction carbon dioxide evolves which produces a foamed material which can be easily processed on an industrial scale. Additionally, the above oligomers and/or polymers, having an end-group bearing a double bond C=C, particularly a crotonate end-group for PHB, can be subjected to subsequent modifications to obtain a wide variety of functional end-groups, for instance carboxyl, carboxylate, hydroxyl, dihydroxyl, oxirane ring, halogen atom. Moreover, the low molecular weight PHAs may be used in the area of controlled delivery systems in agro-chemistry, in the cosmetic industry, in medicine in the form of nano- or microspheres, in household products and in coating systems.
摘要翻译：本发明涉及生产聚羟基链烷酸酯低聚物和/或分子量降低的聚合物的方法，其包括使至少一种聚羟基链烷酸酯（PHA）与至少一种碳酸盐在50℃至300℃的温度下反应，优选从120℃到200℃。上述反应允许PHA链的受控降解，其产生具有可控分子量的低聚物和/或聚合物，考虑到低聚物和/或聚合物预期的特定应用，可调节该分子量和/或聚合物。而且，在反应过程中产生二氧化碳，产生易于在工业规模上加工的发泡材料。另外，具有带有双键C = C的端基，特别是PHB的巴豆酸酯端基的上述低聚物和/或聚合物可以进行后续修饰以获得各种各样的官能端基，用于例如羧基，羧酸酯，羟基，二羟基，环氧乙烷环，卤素原子。此外，低分子量PHA可用于农业化学，化妆品工业中的控制递送系统，纳米或微球体形式的药物，家用产品和涂布系统中。

IPRDB

热门服务

关于我们

友情链接

联系方式