Preparation of polymeric isocyanate containing release agent

Details Preparation of polymeric isocyanate containing release agent Preparation of polymeric isocyanate containing release agent

C - Chemistry, Metallurgy

08

L

154/97

C08L 97/02 (2006.01) C08G 18/72 (2006.01) C08G 18/76 (2006.01) C08L 75/04 (2006.01)

Patent

CA 1145237

3591 ABSTRACT OF THE DISCLOSURE A process is disclosed for the preparation of liquid, storage-stable, polyisocyanate compositions containing a release agent formed in situ which compositions are useful, for example, as binder resins in the formation of particle boards which latter, because of the presence of the release agent, show no tendency to adhere to the face of metal platens used in their formation. The process comprises heating an organic polyisocyanate (polymethylene polyphenyl polyisocyanate preferred) with an acid phosphate (e.g. a mixture of mono- and di-alkyl acid phosphates) under conditions controlled as to time and temperature so as to yield a product which is storage stable and shows no tendency to deposit solid or to separate into two liquid phases. -i-

371792

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