Alkylene oxide adducts of vicinal toluenediamine
AssigneeBASF Wyandotte Corporation
InventorsAlexander Korczak, William W. Levis, Jr.
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Abstract
The subject invention relates to adducts of vicinal toluenediamine prepared by: (a) reacting from one to three moles of ethylene oxide with vicinal toluenediamine at a temperature of 125.degree. C., and (b) reacting the product of (a) with four to eight moles of propylene oxide at a temperature of at least 140.degree. C. in the present of at least 1.0 part of an alkali metal hydroxide catalyst. The adducts generally have a hydroxyl number of 300 to 500 and are particularly useful for the preparation of rigid polyurethane foams.
Claims10
An adduct of vicinal toluenediamine prepared by (a) reacting vicinal toluenediamine with from one to three moles of ethylene oxide per mole of vicinal toluenediamine at a temperature of 125.degree. C. or less, and (b) reacting the product of (a) with from four to eight moles of propylene oxide at a temperature of at least 140.degree. C. in the presence of at least 1.0 part of an alkali metal hydroxide catalyst based upon 100 parts of vicinal toluenediamine.
A process for preparing an adduct of vicinal toluenediamine comprising the steps of (a) reacting vicinal toluenediamine with from one to three moles of ethylene oxide per mole of vicinal toluenediamine at a temperature of 125.degree. C. or less, and (b) reacting the product of (a) with from four to eight moles of propylene oxide at a temperature of at least 140.degree. C. in the presence of at least 1.0 part of alkali metal hydroxide catalyst based upon 100 parts of vicinal toluenediamine.
Dependencies are inferred from the claim text.