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    • 4. 发明授权
    • Process for the preparation of high molecular lactic copolymer polyester
    • 制备高分子量乳酸共聚物聚酯的方法
    • US5616657A
    • 1997-04-01
    • US503608
    • 1995-07-18
    • Shoji ImamuraHiroshi Ebato
    • Shoji ImamuraHiroshi Ebato
    • C08G63/60C08F20/00
    • C08G63/60
    • A novel process for the preparation of a high molecular lactic copolymer polyester is provided, which includes allowing a lactide (A), a polyester terminated by hydroxyl group at both ends (B1), a polyvalent carboxylic acid having 3 or more functionalities and/or acid anhydride thereof (C) to undergo ring opening copolymerization in the presence of a ring opening polymerization catalyst (D). A novel process is also provided which includes allowing the lactide (A) and the polyester (B1) to undergo ring opening copolymerization in the presence of the catalyst (D) to prepare a polyester, and then reacting the polyester with the component (C). A novel process is further provided which includes reacting the polyester (B1) with the polyvalent carboxylic acid component (C) to obtain a polyester terminated by hydroxyl group at both ends having a weight-average molecular weight of from 10,000 to 300,000 (B2), and then allowing the polyester (B2) and the lactide (A) to undergo ring opening copolymerization in the presence of the catalyst (D). Another novel process is provided which includes allowing a dicarboxylic acid, a diol and the polyvalent carboxylic acid component (C) to undergo dehydration reaction and/or deglycolation reaction to obtain a polyester having a weight-average molecular weight of from 10,000 to 300,000 (B3), and then allowing the polyester (B3) and the lactide (A) to undergo ring opening copolymerization in the presence of the catalyst (D).
    • 提供了一种制备高分子量乳酸共聚物聚酯的新方法,其包括使丙交酯(A),两端用羟基封端的聚酯(B1),具有3个或更多个官能团的多元羧酸和/或 其酸酐(C)在开环聚合催化剂(D)的存在下进行开环共聚。 还提供了一种新颖的方法,其包括使丙交酯(A)和聚酯(B1)在催化剂(D)的存在下进行开环共聚以制备聚酯,然后使聚酯与组分(C)反应, 。 进一步提供一种新的方法,其包括使聚酯(B1)与多元羧酸组分(C)反应,得到重均分子量为10,000至300,000(B2)的两端用羟基封端的聚酯, 然后在催化剂(D)的存在下使聚酯(B2)和丙交酯(A)进行开环共聚。 提供另一种新方法,其包括使二羧酸,二醇和多价羧酸组分(C)进行脱水反应和/或脱醇反应,得到重均分子量为10,000至300,000(B3 ),然后在催化剂(D)的存在下使聚酯(B3)和丙交酯(A)进行开环共聚。
    • 5. 发明授权
    • Process for the preparation of high molecular lactic copolymer polyester
    • 制备高分子量乳酸共聚物聚酯的方法
    • US5605981A
    • 1997-02-25
    • US672917
    • 1996-06-28
    • Shoji ImamuraHiroshi Ebato
    • Shoji ImamuraHiroshi Ebato
    • C08G63/60C08F20/00
    • C08G63/60
    • The present invention provides a process for the preparation of a decomposable lactic copolymer polyester which exhibits a sufficiently high molecular weight, heat resistance and thermal stability and further exhibits a rigidity, flexibility and transparency depending on the purpose. The process for the preparation of a high molecular lactic copolymer polyester includes reacting a polyester terminated by hydroxyl group at both ends (B1) with a polyvalent isocyanate (E) having 2 or more functionalities to obtain a polyester (B4) having a weight-average molecular weight of from 10,000 to 300,000, and then allowing said polyester (B4) and lactide (A) to undergo ring opening copolymerization in the presence of a ring opening polymerization catalyst (D). A process is also provided which includes allowing a lactide (A) and a polyester terminated by hydroxyl group at both ends (B1) to undergo ring opening copolymerization in the presence of a ring opening polymerization catalyst (D) to prepare a polyester having a weight-average molecular weight of from 10,000 to 300,000, and then reacting said polyester with a polyvalent isocyanate having 3 or more functionalities.
    • 本发明提供了一种制备可分解乳酸共聚物聚酯的方法,其具有足够高的分子量,耐热性和热稳定性,并且根据目的还显示出刚性,柔韧性和透明度。 制备高分子量乳液共聚物聚酯的方法包括使两末端具有羟基的聚酯(B1)与具有2个或更多个官能团的多价异氰酸酯(E)反应,得到重均分子量的聚酯(B4) 分子量为10,000〜300,000,然后在开环聚合催化剂(D)的存在下使所述聚酯(B4)和丙交酯(A)进行开环共聚。 还提供了一种方法,其包括在开环聚合催化剂(D)的存在下使丙交酯(A)和由两端被羟基封端的聚酯(B1)进行开环共聚以制备具有重量的聚酯 - 平均分子量为10,000至300,000,然后使所述聚酯与具有3个或更多个官能团的多价异氰酸酯反应。
    • 6. 发明授权
    • Continuous production process for lactide copolymer
    • 丙交酯共聚物连续生产工艺
    • US5525671A
    • 1996-06-11
    • US364097
    • 1994-12-27
    • Hiroshi EbatoShoji Imamura
    • Hiroshi EbatoShoji Imamura
    • C08G63/00C08G63/08C08G63/664C08G63/78C08G63/91
    • C08G63/00C08G63/08C08G63/664C08G63/78
    • A process for continuously producing a linear lactide copolymer having a weight-average molecular weight of from 20,000 to 400,000 using a continuous reaction apparatus composed of three or more stirred flow reactors connected in series, which process comprises the steps of continuously feeding from 50 to 98 parts by weight of a lactide and from 2 to 50 parts by weight of a polymer having a hydroxyl group in a molten state or as dissolved in a solvent to the first reactor of said continuous reaction apparatus, and transferring the reaction mixture from said first reactor to the following reactors successively while maintaining the reaction pressure and the reaction temperature in every reactor in the range of from 1 to 5 atm. and of from 140.degree. to 210.degree. C., respectively, to conduct ring opening copolymerization. According to the process of the present invention, the production problems associated with conventional continuous production methods for lactide copolymers, i.e., high viscosity of the reaction system, thermal decomposition of the polymer produced, and coloration of the polymer produced can be eliminated, and a degradable lactide copolymer endowed with broader range properties than conventional lactide copolymers and therefore useful in wider fields can be obtained continuously and efficiently.
    • 一种使用连续反应装置连续制造重均分子量为20,000〜400,000的直链丙交酯共聚物的方法,该连续反应装置由串联连接的三个或更多个搅拌流动反应器组成,该方法包括以下步骤:从50至98 重量份的丙交酯和2至50重量份的具有熔融状态的羟基或溶解在所述连续反应装置的第一反应器中的溶剂的聚合物,并将反应混合物从所述第一反应器 将反应压力和每个反应器中的反应温度保持在1〜5atm的范围内,连续进行下列反应器。 分别为140〜210℃,进行开环共聚。 根据本发明的方法,可以消除与常规的丙交酯共聚物的连续制备方法相关的生产问题,即反应体系的高粘度,所生产的聚合物的热分解和所生产聚合物的着色, 可降解丙交酯共聚物具有比常规丙交酯共聚物更宽的范围性质,因此可以连续有效地获得更广泛的领域。
    • 7. 发明授权
    • Self-water dispersible particle made of biodegradable polyester and process for the preparation thereof
    • 由可生物降解的聚酯制成的自分散水的颗粒及其制备方法
    • US06190773B1
    • 2001-02-20
    • US09296132
    • 1999-04-22
    • Shoji ImamuraYasuyuki WatanabeKazuaki TsukudaTakashi HirokawaNagao Ariga
    • Shoji ImamuraYasuyuki WatanabeKazuaki TsukudaTakashi HirokawaNagao Ariga
    • B32B1502
    • A01N25/28C08L63/06C08L63/08Y10T428/2982
    • A self-water dispersible particle made of a biodegradable polyester and a process for the preparation of an aqueous dispersion of self-water dispersible particles made of a biodegradable polyester containing a hydrophobic core material, which comprises reacting a biodegradable polyester containing hydroxyl group with a polyvalent carboxylic acid or anhydride or chloride thereof, dissolving or dispersing the biodegradable polyester having acid groups thus obtained and a hydrophobic core material in an organic solvent, adding a base to the solution with stirring to neutralize to form the salt of the biodegradable polyester, and then adding water to the solution or dispersion to undergo phase inversion emulsification are disclosed. According to the present invention, a self-water dispersible particle made of a biodegradable polyester having varied average particle diameters of the order of nanometer free of urethane bond and excellent in biodegradability, an aqueous dispersion thereof, a self-water dispersible particle made of a biodegradable polyester comprising a hydrophobic core material encapsulated therein excellent in gradual releasability such as pesticide, and a process for the simple preparation of these products without using any auxiliary stabilizing material such as emulsifying agent or any high speed agitator can be provided.
    • 由可生物降解的聚酯制成的自分散水的颗粒和由含有疏水性芯材料的可生物降解的聚酯制成的自分散水分散体的水分散体的方法,该方法包括使含有羟基的可生物降解的聚酯与多价的 羧酸或其酸酐或氯化物,将由此获得的具有酸基的可生物降解的聚酯和疏水性芯材溶解或分散在有机溶剂中,在搅拌下向溶液中加入碱以中和以形成可生物降解的聚酯的盐,然后 公开了向溶液或分散体中加入水以进行相转化乳化。 根据本发明,由具有不同氨基甲酸酯键的纳米级的平均粒径不等的生物降解性聚酯制成的自
      水分散性粒子,其生物降解性优异,其水分散体,由 可以提供包含其中具有优异的逐渐释放性的疏水性芯材的生物可降解聚酯,例如农药,以及在不使用任何辅助稳定材料如乳化剂或任何高速搅拌器的情况下简单制备这些产品的方法。