Modified polyureas containing N-cyanaminocarbonyl urea groups an

Details Modified polyureas containing N-cyanaminocarbonyl urea groups an Modified polyureas containing N-cyanaminocarbonyl urea groups an

1992-10-05

1994-02-08

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...

525452, 528 57, 528 68, 528 71, 528 73, C08G 1877, C08G 1882

Patent

active

052849287

ABSTRACT:
The present invention relates to polyureas which contain anionic N-cyanaminocarbonyl urea groups corresponding to formula (I) ##STR1## incorporated in the polymer chain and, optionally, terminal anionic cyanourea groups corresponding to formula (II) ##STR2## wherein the ratio of incorporated groups (I) to terminal groups (II) is more than 1:1, preferably more than 2:1.
The present invention also relates to a process for the preparation of these polyureas.

REFERENCES:
patent: 3252945 (1966-05-01), Ugi et al.
patent: 4465825 (1984-08-01), Lin
patent: 4619966 (1986-10-01), Schafer et al.
patent: 4707369 (1987-11-01), Suresky
patent: 4707386 (1987-11-01), Schafer et al.
patent: 4895921 (1990-01-01), Schafer et al.
patent: 4918135 (1990-04-01), Probst et al.

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