METHOD FOR PRODUCTION OF 1,1-1,6-HEXAMETHYLENE-3,3,3',3'-TETRAKIS(2-OXYETHYL)-BIS-UREA Russian patent published in 1997 - IPC

Abstract RU 2072352 C1

FIELD: organic chemistry, medicine. SUBSTANCE: method is carried out by interaction of 1,6-hexamethylene diisocyanate with diethanolamine, said interaction takes place in water. Quantity of said 1,6-hexamethylene diisocyanate is 1.0005-1.1 of its stoichiometric quantity. When said interaction is completed reaction mixture is allowed to stand at 25-60 C within period which is necessary for production of excess 1,6-hexamethylene diisocyanate; thus prepared precipitate is then separated. EFFECT: improves purity of desired product. 1 tbl

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RU 2 072 352 C1

Authors

Urazaev V.G.

Batdalov Ju.R.

Arkhireev V.P.

Dates

1997-01-27—Published

1994-08-10—Filed