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    • 2. 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。
    • 10. 发明授权
    • Resin composition and molded article
    • 树脂组合物和模制品
    • US06262184B1
    • 2001-07-17
    • US09409443
    • 1999-09-30
    • Takeshi KanamoriHiroshi UrayamaKyohei TakakuwaMakoto NakamuraYasuo TerayaSakae Shimotsuma
    • Takeshi KanamoriHiroshi UrayamaKyohei TakakuwaMakoto NakamuraYasuo TerayaSakae Shimotsuma
    • C08L6702
    • C08L67/04A42B3/06C08L69/005C08L2666/18
    • The present invention provides a resin composition comprising polylactic acid and aliphatic polyester carbonate, which has practically adequate heat-resistance temperature, moldability, thermostability, solvent resistance and high mechanical strength, as well as a molded article thereof. In the resin composition, the Vicat softening point is 60° C. or more, the tensile modulus of elasticity is 0.9 GPa or more, the modulus in flexure is 0.6 GPa or more, and the mixing ratio of polylactic acid (A) and aliphatic polyester carbonate (B), in terms of the ratio of (A)/(B) by weight, is 95/5 to 5/95. Further, the present invention provides a biodegradable injection-molded article having improvements in mechanical characteristics and impact resistance and superior disposal properties, particularly having strength enough to make it usable as a headgear material for use in helmets. The biodegradable injection-molded article is excellent in impact resistance, comprising mainly polylactic acid (A) and aliphatic polyester (E) and/or aliphatic polyester carbonate (B). This injection-molded article has a flexural strength of 30 MPa or more and an Izod impact strength of 3 kJ/m2 or more, and it is used as helmet headgear.
    • 本发明提供了具有实际上足够的耐热温度,成型性,耐热性,耐溶剂性和高机械强度的聚乳酸和脂肪族聚酯碳酸酯的树脂组合物及其成型品。 在树脂组合物中,维卡软化点为60℃以上,拉伸弹性模量为0.9GPa以上,挠曲模量为0.6GPa以上,聚乳酸(A)和脂肪族 聚酯碳酸酯(B)按重量比(A)/(B)计为95/5〜5/95。 此外,本发明提供了具有机械特性和耐冲击性改善以及优异的处置性能的生物降解性注射成型制品,特别是具有足以使其可用作头盔用头盔材料的强度。 生物降解性注射成型品的耐冲击性优异,主要包括聚乳酸(A)和脂肪族聚酯(E)和/或脂肪族聚酯碳酸酯(B)。 该注射成型品的弯曲强度为30MPa以上,Izod冲击强度为3kJ / m 2以上,用作头盔头饰。