Copolyester-ether polymers
    55.
    依法登记的发明
    Copolyester-ether polymers 失效
    共聚酯 - 醚聚合物

    公开(公告)号:USH1669H

    公开(公告)日:1997-07-01

    申请号:US742396

    申请日:1996-11-04

    CPC classification number: C08G63/672

    Abstract: A segmented copolyester-ether polymer comprises 9.5 to 33 percent by weight hard segment residues of polybutylene terephthalate and 0.5 to 67 percent by weight soft segment residues of a polyether polyol comprised of n units of residue (1) and m units of residue (2), wherein the total value of n+m is in the range 2 to 70, m/(n+m) is in the range 0.05 to 0.98, and residues (1) and (2) have the structures: ##STR1## The polyether polyol is further characterized in that at least 95 percent of the hydroxyl groups are primary hydroxyl groups.

    Abstract translation: 分段的共聚酯 - 醚聚合物包含9.5至33重量%的聚对苯二甲酸丁二醇酯的硬链段残基和0.5至67重量%的由n个残基(1)单元和m个残基(2)组成的聚醚多元醇的软链段残基, ,其中n + m的总值在2〜70的范围内,m /(n + m)在0.05〜0.98的范围内,残基(1)和(2)的结构如下:聚醚 多元醇的特征还在于至少95%的羟基是伯羟基。

    Polyether glycols and alcohols derived form 3,4-epoxy-1-butene,
tetrahydrofuran and an initiator
    56.
    发明授权
    Polyether glycols and alcohols derived form 3,4-epoxy-1-butene, tetrahydrofuran and an initiator 失效
    衍生自3,4-环氧-1-丁烯,四氢呋喃和引发剂的聚醚二醇和醇

    公开(公告)号:US5536809A

    公开(公告)日:1996-07-16

    申请号:US554999

    申请日:1995-11-13

    CPC classification number: C08G65/14 C08G65/20 C08G65/322

    Abstract: Disclosed are novel polyether compounds obtained by the reaction or polymerization of 3,4-epoxy-1-butene in the presence of tetrahydrofuran, an acidic catalyst and a nucleophilic initiator compound. The polyether compounds comprise m units of residue (1), n units of residue (2), and p units of residue (3) wherein (i) residues (1), (2) and (3) have the structures: ##STR1## (ii) the total value of m+n+p is 5 to 70; (iii) the value of n/(m+n+p) is in the range of 0.2 to 0.4, i.e., residue (2) constitutes from 20 to 40 mole percent of the total moles of residues (1), (2) and (3); and (iv) at least 98 percent of the terminal groups have the structure: ##STR2##

    Abstract translation: 公开了在四氢呋喃,酸性催化剂和亲核引发剂化合物的存在下通过3,4-环氧-1-丁烯的反应或聚合得到的新型聚醚化合物。 聚醚化合物包括m个残基(1),n个残基(2)单元和p个残基(3)单元,其中(i)残基(1),(2)和(3)具有以下结构:

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