Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having at least one -n=c=x group as well as...
Patent
1996-12-27
1998-05-26
Sergent, Rabon
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From reactant having at least one -n=c=x group as well as...
521 495, 525452, 525457, 525458, 528 67, 528 76, 528 77, 560 25, 560 26, 560336, 560360, C08G 1810, C08G 1876, C07C26902, C07C27126
Patent
active
057566364
ABSTRACT:
A substantially solid free isocyanate prepolymer is made by reacting an isocyanate mixture which is made up of a toluene diisocyanate residue containing monomeric toluene diisocyanate and optionally, additional monomeric toluene diisocyanate in an amount such that the total NCO content is at least 37% with a polyether polyol having an ethylene oxide content of at least 30%. The polyether polyol has a molecular weight of from about 200 to about 6,000 and a functionality of from 2 to 6. The product prepolymers are particularly useful in the production of polyurethanes.
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Pisipati Jyothi S.
Slack William E.
Bayer Corporation
Gil Joseph C.
Sergent Rabon
Whalen Lyndanne M.
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