Invention Grant
- Patent Title: Polylactic acid stereocomplex composition, its molded product, a process for its manufacture and its application
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Application No.: US14778375Application Date: 2014-03-19
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Publication No.: US09644095B2Publication Date: 2017-05-09
- Inventor: Xiuqin Zhang , Zujiang Xiong , Guoming Liu , Xia Dong , Tao Wen , Rui Wang , Dujin Wang
- Applicant: INSTITUTE OF CHEMISTRY, CHINESE ACADEMY OF SCIENCES , PURAC BIOCHEM BV
- Applicant Address: CN Beijing NL Gorinchem
- Assignee: Institute of Chemistry, Chinese Academy of Sciences,Purac Biochem B.V.
- Current Assignee: Institute of Chemistry, Chinese Academy of Sciences,Purac Biochem B.V.
- Current Assignee Address: CN Beijing NL Gorinchem
- Agency: Mendelsohn Dunleavy, P.C.
- Priority: CN201310090619 20130320
- International Application: PCT/EP2014/055517 WO 20140319
- International Announcement: WO2014/147132 WO 20140925
- Main IPC: C08K5/20
- IPC: C08K5/20 ; C08L67/04 ; C08G63/08 ; C08J3/21
Abstract:
The instant invention discloses a polylactic acid stereocomplex composition containing pure stereocomplex crystals and a process for its manufacture. The composition according to this invention comprising (a) 30-70 wt % poly (L-lactic acid) (PLLA). (b) 70-30 wt % poly (D-lactic acid) (PDLA) and (c) 0.01-10 wt % nucleating agent, which can be obtained by solution and melt blending. Stereocomplex crystals are preferentially formed according to the invention, and the homocrystals (a crystal form) for the PLLA or PDLA homopolymer can't be observed. The melting temperature of the composition according to the invention is at least 200° C., which is about 30-50° C. higher than the PLLA or PDLA homopolymer.
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