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    Polylactic acid composite and use thereof
    5.
    发明授权
    Polylactic acid composite and use thereof 有权

    公开(公告)号：US11530294B2

    公开(公告)日：2022-12-20

    申请号：US16644509

    申请日：2018-06-26

    申请人： Kingfa Sci. & Tech. Co., Ltd. ,  Zhuhai Wango Chemical Co., Ltd.

    发明人： Changli Lu ,  Zhimin Yuan ,  Tongmin Cai ,  Xianbo Huang ,  Xiangbin Zeng ,  Jian Jiao ,  Kai Xiong ,  Hui Yang ,  Kaijin Mai ,  Xueteng Dong ,  Shihua He

    IPC分类号： C08G63/08 ,  C08K3/34 ,  C08K5/00

    摘要： The present invention discloses a polylactic acid composite and use thereof. The polylactic acid composite includes the following components: (A) 89 to 98 parts by weight of polylactic acid; (B) 1 to 4 parts by weight of talcum powder; and (C) 1 to 7 parts by weight of a plasticizer. In the component (A), the polylactic acid has a polydispersity index P satisfying the following relationship: 1.55≤P≤2.02. In the component (B), the talcum powder has a particle size D(50) satisfying: 1 μm≤D(50)≤2.6 μm. In the component (C), the plasticizer has a relative molecular weight M satisfying: 180≤M≤670. Through research, the present invention has unexpectedly discovered that by using the polylactic acid having the polydispersity index P satisfying the relationship 1.55≤P≤2.02 as a matrix, adding a specific range of content of ultrafine talcum powder as a nucleating agent, and selecting the plasticizer of a specific molecular weight as a crystallization promotion agent, the prepared polylactic acid composite has a light transmittance T≥80%, a haze H≤40%, and a heat deflection temperature HDT≥90° C., having significantly improved heat resistance and transparency.

    Biodegradable polyester composition and use thereof
    10.
    发明授权
    Biodegradable polyester composition and use thereof 有权

    公开(公告)号：US11370909B2

    公开(公告)日：2022-06-28

    申请号：US16644459

    申请日：2019-05-24

    申请人： KINGFA SCI. & TECH. CO., LTD.

    发明人： Chunping Ouyang ,  Jian Jiao ,  Kaijin Mai ,  Xueteng Dong ,  Hui Yang ,  Weida Qu ,  Kai Xiong ,  Changli Lu ,  Xiangbin Zeng ,  Tongmin Cai ,  Xianbo Huang

    IPC分类号： C08L67/02 ,  C08L3/02 ,  C08J5/18 ,  C08K3/26 ,  C08K3/34 ,  C08K5/053

    摘要： The present invention discloses a biodegradable polyester composition, wherein the biodegradable polyester composition comprises the following components in parts by weight: i) 58 to 80 parts by weight of an aliphatic-aromatic copolyester; ii) 20 to 32 parts by weight of starch; and iii) 0 to 10 parts by weight of a processing agent. The present invention unexpectedly found by research that by using an aliphatic-aromatic copolyester in which an amount of aromatic carboxylic acid accounts for a total amount of diacid is 44 mol % to 48 mol % as a matrix resin, where the aliphatic-aromatic copolyester has a crystallization peak width D of 5° C. to 16° C., and by using starch of which a particle size D (50) is 2 μm to 12 μm as the other phase, and meanwhile by adding a specific amount of a processing agent, the polyester composition prepared has excellent transversal and longitudinal tear strengths, and the polyester composition has a biodegradation rate of 90% or more during the 12-week degradation test, satisfying the industrial compost.