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    Polylactic acid composite and use thereof
    1.
    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
    8.
    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.

    PBS resin composition and preparation method thereof
    9.
    发明授权
    PBS resin composition and preparation method thereof 有权

    公开(公告)号：US10815332B2

    公开(公告)日：2020-10-27

    申请号：US16317648

    申请日：2017-11-30

    申请人： Kingfa Sci. & Tech. Co., Ltd.

    发明人： Weiwei Wang ,  Zhimin Yuan ,  Tongmin Cai ,  Xianbo Huang ,  Xiangbin Zeng ,  Renxu Yuan ,  Zhilong Guo ,  Meijun Tang

    IPC分类号： C08G63/16 ,  C08G63/78 ,  C08K5/521 ,  C08K5/56 ,  C08K5/10

    摘要： The present invention discloses a PBS resin composition and a preparation method thereof. The composition comprises: a. PBS resin; b. element titanium; c. element phosphorus, wherein a weight ratio range of titanium to phosphorus is 0.6-10:1, preferably 0.7-4:1, and more preferably 1.25-1.5:1. A weight content of the element titanium is 20-200 ppm, and a weight content of the element phosphorus is 15-70 ppm. By adding a titanium-containing compound and a phosphorus-containing compound and controlling the range of the weight ratio of the element titanium to the element phosphorus in the PBS resin composition to be 0.6-10:1, the present invention obtains a PBS resin composition. After treating in a 95° C.-distilled water bath for 12 hours and drying at 90° C. for 3 hours, a change of the melt flow index of the PBS resin composition is less than 50.0 g/10 min, and the PBS resin composition possesses an obviously improved hydrolysis property.

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

    公开(公告)号：US11149112B2

    公开(公告)日：2021-10-19

    申请号：US16644504

    申请日：2018-06-26

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

    发明人： Weiwei Wang ,  Zhimin Yuan ,  Tongmin Cai ,  Xianbo Huang ,  Xiangbin Zeng ,  Nanbiao Ye ,  Zhilong Guo ,  Changli Lu

    IPC分类号： C08G63/183

    摘要： The present invention relates to a biodegradable polyester and use thereof, including components: A) acid components containing following repeating units: 50 to 58 mol % of terephthalic acid A1; 30 to 40 mol % of sebacic acid A2; and 2 to 20 mol % of an aliphatic dibasic acid A3 with a carbon chain length of 6 or less; B) butanediol. In the present invention, in the case of a high content of the terephthalic acid, the biodegradable polyester prepared by introducing an aliphatic dibasic acid unit having a carbon chain length of 6 or less can satisfy the degradation performance and rigidity and improve the tenacity of the material simultaneously.