Abstract: 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%.
Type:
Grant
Filed:
September 9, 2002
Date of Patent:
May 3, 2005
Assignee:
Bayer MaterialScience LLP
Inventors:
William E. Slack, Hersel T. Kemp, II, William E. Miller
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