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    Simplified method of producing biodegradable aliphatic polyesters
    1.
    发明授权
    Simplified method of producing biodegradable aliphatic polyesters 有权
    生产可降解脂肪族聚酯的简化方法

    公开(公告)号：US07253250B2

    公开(公告)日：2007-08-07

    申请号：US11059658

    申请日：2005-02-17

    申请人： Fernanda Farachi ,  Marco Foa' ,  Tiziana Milizia

    发明人： Fernanda Farachi ,  Marco Foa' ,  Tiziana Milizia

    IPC分类号： C08G63/78

    CPC分类号： C08G63/85 ,  C08G63/16 ,  C08G63/60 ,  C08G63/78 ,  Y10T428/31504 ,  Y10T428/31786

    摘要： A method of synthesizing biodegradable aliphatic polyesters from one or more aliphatic dicarboxylic acids or diesters of the said acids and one or more linear or branched aliphatic glycols, comprising a first esterification or transesterification step and a second deglycolation under vacuum step, in which the catalyst is monobutylstannoic acid both for the esterification or transesterification step and for the deglycolation under vacuum step.

    摘要翻译： 从一种或多种所述酸的一种或多种脂肪族二羧酸或二酯和一种或多种直链或支链脂族二醇合成可生物降解的脂族聚酯的方法，包括第一酯化或酯交换步骤和在真空步骤下的第二去离聚反应，其中催化剂为 用于酯化或酯交换步骤和在真空步骤下进行脱胶的单丁基锡酸。

    Use of polyester resins for the production of articles having good properties as barriers to water vapor
    2.
    发明授权
    Use of polyester resins for the production of articles having good properties as barriers to water vapor 有权
    使用聚酯树脂制造具有良好性能的物品作为水蒸气的障碍物

    公开(公告)号：US06727342B1

    公开(公告)日：2004-04-27

    申请号：US09786097

    申请日：2001-06-08

    申请人： Catia Bastioli ,  Marco Foa' ,  Giandomenico Cella ,  Giovanni Floridi ,  Fernanda Farachi ,  Tiziana Milizia

    发明人： Catia Bastioli ,  Marco Foa' ,  Giandomenico Cella ,  Giovanni Floridi ,  Fernanda Farachi ,  Tiziana Milizia

    IPC分类号： C08G6302

    CPC分类号： C08L67/04 ,  C08L3/00 ,  C08L67/02 ,  Y10T428/1331 ,  Y10T428/31504 ,  Y10T428/31786 ,  C08L2666/26 ,  C08L2666/02

    摘要： Polyester resins formed by recurring units X=[O—(CH2)n—OCO—(CH2)m—CO] and/or Y=[O—(CH2)k—CO], where the half-sum of n+m is equal to or greater than 6 and k is a number equal to or greater than 6, or by copolymers comprising units and/or sequences having the formula xi[O—(CH2)ni—OCO—(CH2)mi—CO]; yj[O—(CH2)kj—CO] where: i,j=1-5; ni=2-22; mi=0-20; kj=1=21; (Formula (1)) and xi and yj vary between 0 and 1 and are molar fractions of the various units such that (Formula (2)), are used for the preparation of products in which a permeability to water vapour of less than 350 g×30 &mgr;m/m2 per day, measured at 38° C. and 90% RH and good biodegradability are required. ∑ i = 1 5 ⁢ x i + ∑ j = 1 5 ⁢ y j = 1 ( 1 ) ∑ i = 1 5 ⁢ x i · ( n i + m i 2 ) + ∑ j = 1 5 ⁢ y j · k j ≥ 6 ( 2 )

    摘要翻译： 由重复单元X = [O-（CH2）n-OCO-（CH2）m-CO]和/或Y = [O-（CH2）k-CO]形成的聚酯树脂，其中n + m的半和 等于或大于6且k是等于或大于6的数，或通过包含具有式xi [O-（CH 2）n -OCO-（CH 2）m-CO]的单元和/或序列的共聚物; yj [O-（CH2）kj-CO]其中：i，j = 1-5; ni = 2-22; mi = 0-20; kj = 1 = 21; （式（1））和xi和yj在0和1之间变化，并且是各种单元的摩尔分数，使得（式（2））用于制备其中水蒸汽渗透率小于350的产物 在38℃和90％RH下测量，每天需要gx30mum / m 2，具有良好的生物降解性。