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    • 5. 发明授权
    • Thermoplastic polyurethane resin having broad rubbery-state region and
process for producing the same
    • 具有宽橡胶状态区域的热塑性聚氨酯树脂及其制造方法
    • US5494990A
    • 1996-02-27
    • US415342
    • 1995-04-03
    • Hiroyuki TagawaKazuaki Okabe
    • Hiroyuki TagawaKazuaki Okabe
    • C08G18/10C08G18/32C08G18/48C08G18/65C08G18/66C08G18/76C08G18/28
    • C08G18/6674C08G18/10C08G18/3218C08G18/4858
    • Disclosed is a polyurethane resin having a broad rubbery-state region which has a number-average molecular weight of from 30,000 to 500,000 and comprises repeating units (A) represented by formula (I):--CONH-X-NHCOO-Y-O- (I)wherein X represents the divalent residue formed by removing the isocyanate groups from a specific aromatic diisocyanate and Y represents the divalent residue formed by removing the hydroxyl groups from a poly(alkylene ether) diol whose main chain is made up of the group represented by --CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2 O-- and a group represented by --CHR.sub.1 CHR.sub.2 CHR.sub.3 CHR.sub.4 O-- where one of R.sub.1, R.sub.2, R.sub.3, and R.sub.4 is a lower alkyl group and the remaining three each is a hydrogen atom, and which has a number-average molecular weight of from 500 to 10,000, and repeating units (B) represented by formula (II):--CONH-X-NHCOO-Z-O-- (II)wherein Z represents the divalent residue formed by removing the hydroxyl groups from 3,9-bis(1,1-dimethyl-2-hydroxyethyl)-2,4,8,10-tetraoxaspiro[5,5]undecane), the repeating units (A) and (B) being bonded together in a random sequence, with the proportion of (A)/(B) being from 0.1 to 2.0.
    • 公开了具有数均分子量为30,000〜500,000的宽橡胶状态区域的聚氨酯树脂,并且包含由式(I)表示的重复单元(A):-CONH-X-NHCOO-YO-(I )其中X表示通过从特定芳族二异氰酸酯除去异氰酸酯基而形成的二价残基,Y表示通过从主链由以下组成的基团构成的聚(亚烷基醚)二醇除去羟基而形成的二价残基: CH2CH2CH2CH2O-和由-CHR1CHR2CHR3CHR4O-表示的基团,其中R1,R2,R3和R4中的一个为低级烷基,其余三个为氢原子,数均分子量为500至10,000 ,和由式(II)表示的重复单元(B):-CONH-X-NHCOO-ZO-(II)其中Z表示通过从3,9-双(1,1-二甲基 -2-羟乙基)-2,4,8,10-四氧杂螺[5,5]十一烷),重复 单位(A)和(B)以随机顺序键合在一起,(A)/(B)的比例为0.1至2.0。