Title:
DIOL-TERMINATED POLYCARBONATE
Document Type and Number:
Japanese Patent JP3240194
Kind Code:
B2
Abstract:
PURPOSE: To improve hydrolyzability and heat resistance by transesterfying an organic carbonate and a specified diol mixture.
CONSTITUTION: An organic carbonate and a mixture of diols of Ho-R1-OH and HO-R2-oH [wherein R1 represents 8-14C linear alkylene obtained by loosing 2 hydroxyls from HO-R1-OH and R2 represents 2-14C linear or branched (cyclo) alkylene, a bivalent group obtained from a polyether diglycol by loosing the two hydroxyls at the terminals, two bivalent groups of formula I, a bivalent group obtained by loosing two hydroxyls from a condensation of a lactone of formula II (wherein m is 3 to 5 and n is 4 to 14) with a linear aliphatic glycol] are subjected to transesterification to obtain a diol-terminated polycarbonate having a molecular weight of 1,500 to 150,000 of formula III [wherein R1-CO-O- and -R2-O-CO-O are in random forms, R3 stands for a bivalent group of R1 or R2, and x and y are in an amount of 50 to 95% of all the copolymers in terms of a structural unit corresponding to -(R1OCO-O)x].
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Inventors:
Albert Greco
Application Number:
JP29065992A
Publication Date:
December 17, 2001
Filing Date:
September 17, 1992
Export Citation:
Assignee:
Enichem Synthesis Societa Peratini
International Classes:
C08G18/10; C08G18/42; C08G18/44; C08G18/67; C08G18/81; C08G64/00; C08G64/02; C08G64/16; C08G64/18; C08G64/20; C08G64/30; C09J175/00; C09J175/04; C09J175/16; C09K3/10; (IPC1-7): C08G64/02; C08G18/44; C09J175/04; C09K3/10
Other References:
【文献】米国特許4808691(US,A)
【文献】欧州特許出願公開442402(EP,A2)
【文献】欧州特許出願公開442402(EP,A2)
Attorney, Agent or Firm:
Minoru Nakamura (7 outside)