Polyurea dispersions in organic isocyanates

Details Polyurea dispersions in organic isocyanates Polyurea dispersions in organic isocyanates

1986-02-24

1988-11-22

Hoke, Veronica P.

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 66, C08G 1832

Patent

active

047867043

ABSTRACT:
A dispersion of a polyurea in an aromatic polyisocyanate is prepared by mixing the polyisocyanate with one or more aliphatic diprimary diamines having (a) at least one amine group attached to a carbon atom having not more than one hydrogen atom attached thereto or (b) at least one amine group attached to a carbon atom which is itself attached to a carbon atom having not more than one hydrogen atom attached thereto, provided that both amine groups are not attached directly to separate rings of an alkylene-linked polycyclic aliphatic ring system. The reaction preferably takes place at a temperature in the range 20.degree. C. to 60.degree. C. The polyurea dispersion products are useful for manufacture of polyurethane foams and elastomers of superior physical properties.

REFERENCES:
patent: 3903126 (1975-09-01), Woerner et al.
patent: 3943158 (1976-03-01), Dietrich et al.
patent: 4224417 (1980-09-01), Hajak
patent: 4264519 (1981-04-01), Hennig et al.
patent: 4320067 (1982-03-01), Bonin et al.
patent: 4384052 (1983-05-01), McBrayer et al.
patent: 4438250 (1984-03-01), Grogler et al.
patent: 4590226 (1986-05-01), Brown et al.
patent: 4631298 (1986-12-01), Presswood

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