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Title:
PRODUCTION OF POLYETHER-POLYOL
Document Type and Number:
Japanese Patent JPS57168919
Kind Code:
A
Abstract:

PURPOSE: To obtain a polyether-polyol having improved compatibility and pouring characteristic and capable of providing urethane foams having improved physical properties, by mixing tolylenediamine with ethylene oxide and propylene oxide and then adding propylene oxide.

CONSTITUTION: 1mol of tolylenediamine is mixed with 2.5W4.0mol of ethylene oxide and 0.5W2.0mol of propylene oxide, or the mixture is subjected to an addition reaction at the same time. Then, propylene oxide is added thereto to a hydroxyl value of 300W420(KOH mg/g) to obtain a polyether-polyol. As the above tolylenediamine, there is used 2,4-tolylenediamine or 3,4-tolylenediamine. As the alkylene oxides, there are used ethylene oxide and propylene oxide for the sake of practicality.


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Inventors:
ENDOU SEIJI
YANAGIYA MASAHIDE
MANABE TOYOICHI
AKIMOTO MIKIO
TEZAWA SABUROU
MANO TATSUYA
IWASAKI SHIZUKO
Application Number:
JP5304781A
Publication Date:
October 18, 1982
Filing Date:
April 10, 1981
Export Citation:
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Assignee:
TOHO CHEM IND CO LTD
International Classes:
C08G65/00; C08G65/26; (IPC1-7): C08G65/26
Domestic Patent References:
JPS4832597A1973-04-28
JPS5188927A1976-08-04
JPS5485300A1979-07-06
JPS4951397A1974-05-18



 
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