发明名称 |
PRODUCTION METHOD OF MEDICAL POLYOXYPROPYLENE POLYMER AND
PRODUCTION METHOD OF MEDICAL POLYOXYPROPYLENE/POLYOXYETHYLENE
BLOCK COPOLYMER |
摘要 |
A method of producing a medical polyoxypropylene polymer and a polyoxypropylene/polyoxyethylene block copolymer including (A) adding to a polyoxypropylene polymer which is obtained by ring-opening polymerization of propylene oxide to a starting substance having an active hydrogen reacting with the propylene oxide and contains allyl ether as an impurity, a tertiary alkoxide of alkali metal in an excess amount based on a molar number of the active hydrogen of the starting substance and heat treating at 115° C. or less to isomerize the allyl ether to propenyl ether; and (B) adding a mineral acid to the product obtained in step (A) to adjust pH to 4 or less and treating at 70° C. or less to hydrolyze the propenyl ether. Also disclosed is a method of producing a medical polyoxypropylene/polyoxyethylene block copolymer which includes performing ring-opening polymerization of ethylene oxide to the polyoxypropylene polymer obtained above. |
申请公布号 |
US2016264730(A1) |
申请公布日期 |
2016.09.15 |
申请号 |
US201415033303 |
申请日期 |
2014.10.24 |
申请人 |
NOF CORPORATION |
发明人 |
TSUBUSAKI Takuma;YAMAMOTO Yuji |
分类号 |
C08G65/08;A61L27/18;A61L31/06 |
主分类号 |
C08G65/08 |
代理机构 |
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代理人 |
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主权项 |
1. A production method of a medical polyoxypropylene polymer, comprising the following steps:
(A) a step of adding to a polyoxypropylene polymer which is obtained by ring-opening polymerization of propylene oxide to a starting substance having an active hydrogen reacting with the propylene oxide and contains allyl ether as an impurity, a tertiary alkoxide of alkali metal in an excess amount based on a molar number of the active hydrogen of the starting substance and heat treating at 115° C. or less to isomerize the allyl ether to propenyl ether; and (B) a step of adding a mineral acid to the product obtained in the step (A) to adjust pH to 4 or less and treating at 70° C. or less to hydrolyze the propenyl ether. |
地址 |
Tokyo JP |