Substituted ureas containing cyclic amines as chain extenders in

Details Substituted ureas containing cyclic amines as chain extenders in Substituted ureas containing cyclic amines as chain extenders in

1993-03-31

1994-11-15

Kight, III, John

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...

528341, 528406, 540484, 540598, 540603, 540607, 540612, 544357, 544370, 544406, 5483127, C08G 1832

Patent

active

053649249

ABSTRACT:
Diamino ureas having the formula ##STR1## wherein each ring is saturated and includes 3-5 carbon atoms and n alkyl substituents R of 1-4 carbon atoms each and n for each ring is 1-4, a method of using these materials as chain extending agents in the manufacture of poly(urethane/urea)s or polyureas, and polymers having at least one constituent unit derived from such diamino ureas are claimed.

REFERENCES:
patent: 4007156 (1977-02-01), Ramey
patent: 4007157 (1977-02-01), Ramey
patent: 4782071 (1988-11-01), Butler

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