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    • 19. 发明授权
    • Aliphatic polyester carbonate and process for producing the aliphatic
polyester carbonate
    • 脂肪族聚酯碳酸酯及其制造方法
    • US5880224A
    • 1999-03-09
    • US901468
    • 1997-07-28
    • Mitsuo MiuraKyohei TakakuwaTakayasu FujimoriMaki Ito
    • Mitsuo MiuraKyohei TakakuwaTakayasu FujimoriMaki Ito
    • C08G63/64C08G63/78C08G63/88C08K3/32C08L101/16
    • C08G63/64C08K3/32
    • A process for producing an aliphatic polyester carbonate which comprises reacting (1) an aliphatic dicarboxylic acid compound containing succinic acid as a main component, (2) an aliphatic dihydroxy compound containing 1,4-butanediol as a main component, and (3) (a) a polyhydric alcohol having 3 or more hydroxyl groups in a molecule, (b) a polybasic carboxylic acid compound having 3 or more carboxyl groups in a molecule, or (c) a polybasic carboxylic acid having one or more hydroxyl groups in a molecule to obtain an aliphatic polyester oligomer and reacting the obtained aliphatic polyester oligomer and a carbonate compound, wherein the aliphatic polyester carbonate has a melt tension of 1.5 g or more at 190.degree. C. and at an extrusion rate of 10 mm/minute; a process for producing an aliphatic polyester carbonate which comprises reacting above components (1) and (2) to obtain an aliphatic polyester oligomer and reacting the obtained aliphatic polyester oligomer, above component (3) (a), and a carbonate compound, wherein the aliphatic polyester carbonate has the same properties; and aliphatic polyester carbonates produced by these processes. The aliphatic polyester carbonate is branched and biodegradable, has a high molecular weight, and shows higher melt tension and more excellent molding property in comparison with conventional linear aliphatic polyester carbonates in molding of the polyester carbonate to prepare films, sheets, fibers, and other molded products.
    • 一种脂肪族聚酯碳酸酯的制造方法,其特征在于,使(1)以琥珀酸为主要成分的脂肪族二羧酸化合物与(2)以1,4-丁二醇为主要成分的脂肪族二羟基化合物和(3)( a)分子中具有3个以上羟基的多元醇,(b)分子中具有3个以上羧基的多元羧酸化合物,或(c)分子中具有一个以上羟基的多元羧酸 得到脂肪族聚酯低聚物,使所得到的脂肪族聚酯低聚物和碳酸酯化合物反应,其中脂族聚酯碳酸酯在190℃,挤出速度为10毫米/分钟时的熔融张力为1.5克以上。 一种脂肪族聚酯碳酸酯的制造方法,其特征在于,使上述成分(1)和(2)反应,得到脂肪族聚酯低聚物,使得到的脂肪族聚酯低聚物,上述成分(3)(a)和碳酸酯化合物反应, 脂肪族聚酯碳酸酯具有相同的性质; 和通过这些方法生产的脂肪族聚酯碳酸酯。 与聚酯碳酸酯成型时的常规直链脂族聚酯碳酸酯相比,脂肪族聚酯碳酸酯是分支和可生物降解的,具有高分子量,并且显示出更高的熔体张力和更优异的成型性能,以制备膜,片,纤维等成型 产品。