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
1989-12-11
1991-05-07
Welsh, Maurice J.
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...
528 61, 528 68, 528 76, C08G 1810
Patent
active
050138120
ABSTRACT:
Disclosed are polybiuret compositions prepared by the reaction of a polyoxyalkylene polyurea and a polyisocyanate. ##STR1## where R is H, CH.sub.3 or C.sub.2 H.sub.5 and R' is an organic radical. The reaction product of a polyoxyalkylene polyurea and polyisocyanates are prepared without the necessity of a catalyst.
REFERENCES:
patent: 4795764 (1989-01-01), Alm et al.
Speranza George P.
Su Wei-Yang
Kendrick Cynthia L.
Park Jack H.
Priem Kenneth R.
Texaco Chemical Company
Welsh Maurice J.
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