Process for producing unsaturated group-terminated high-molecula

Details Process for producing unsaturated group-terminated high-molecula Process for producing unsaturated group-terminated high-molecula

1990-08-30

1992-07-14

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From heterocyclic reactant containing as ring atoms oxygen,...

5253593, 528409, 568613, 568616, 568617, 568618, 568619, C08G 6532

Patent

active

051304139

ABSTRACT:
A process for producing an unsaturated group-terminated high-molecular weight polyalkylene oxide by adding an alkali metal and/or an alkali metal compound capable of producing an alkali metal hydroxide on reaction with water to a hydroxyl-terminated polyalkylene oxide having a repeating unit represented by formula --R.sup.1 --O-- (wherein R.sup.1 represents a divalent alkylene group having from 2 to 8 carbon atoms) to substitute the hydrogen atom of the hydroxyl end group with an alkali metal (alkoxidation) the resulting polyalkylene oxide is reacted with a polyhalogen compound to increase the molecular weight of the polyalkylene oxide and then additional alkali metal and/or alkali metal compound is added before reacting the resulting high-molecular weight polyalkylene oxide with an unsaturated halogen compound to introduce an unsaturated group to the molecular chain terminals. The first addition of alkali metal and/or alkali metal compound capable of producing an alkali metal hydroxide on reacting with water is added in an amount equivalent to or less than the hydroxyl end groups of said polyalkylene oxide and second addition of alkali metal and/or alkali metal compound is added in an amount equivalent to or greater than the remaining hydroxyl end groups.

REFERENCES:
patent: 3951888 (1976-04-01), Isayama et al.
patent: 4587365 (1986-05-01), Anchor
Patent Abstracts of Japan, vol. 3, No. 7 (C-35) (3011) Jan. 30, 1979 and JP-A-53 134 095 (Kanegafuchi Kagaku Kogyo K.K.) Nov. 22, 1979.
Database WPIL, No. 82-86772E, Derwent Publ. Ltd., London, GB; and JP-A-57143324/Kanegafuchi Chem. Apr. 9, 1982.

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