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NEW POLYMERIC ALLOPHANATES OF DIPHENYLMETHANE DIISOCYANATE, PREPOLYMERS OF THESE POLYMERIC ALLOPHANATES, AND PROCESSES FOR THE PREPARATION OF THE POLYMERIC ALLOPHANATES AND THE PREPOLYMERS THEREOF
NEW POLYMERIC ALLOPHANATES OF DIPHENYLMETHANE DIISOCYANATE, PREPOLYMERS OF THESE POLYMERIC ALLOPHANATES, AND PROCESSES FOR THE PREPARATION OF THE POLYMERIC ALLOPHANATES AND THE PREPOLYMERS THEREOF
The present invention relates to a new high functionality MDI. In particular, this invention relates to polymeric allophanates based on diphenylmethane diisocyanate having an NCO group content of 12 to 30%, prepolymers thereof, and processes for the production of these compositions. The prepolymers are stable liquids having NCO group contents of about 10 to about 28%.
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