Partially carbodiimidized methylenebis (phenyl isocyanate)...

Details Partially carbodiimidized methylenebis (phenyl isocyanate)... Partially carbodiimidized methylenebis (phenyl isocyanate)...

C - Chemistry, Metallurgy

08

G

260/455.2

C08G 18/79 (2006.01)

Patent

CA 1112659

PARTIALLY CARBODIIMIDIZED METHYLENEBIS(PHENYL ISOCYANATE) AND PREPARATION THEREOF ABSTRACT OF THE DISCLOSURE The instant invention is directed to storage stable liquid, partially carbodiimidized methylenebis(phenyl isocyanate) and to the method of manufacture thereof. The products of the instant invention are produced by heating methylenebis(phenyl isocyanate) at a temperature of from 150 to 300°C in the presence of from 1 ppb to 10 ppm of a phos- pholine oxide catalyst. The reaction mixture is then cooled once the desired isocyanate content has been reached. The resultant product can be used to produce a variety of isocyanate-addition reaction products, including polyure- thanes, polyureas and the like.

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