Process for the production of aqueous polyurethane dispersions

Details Process for the production of aqueous polyurethane dispersions Process for the production of aqueous polyurethane dispersions

1990-07-03

1991-06-18

Welsh, Maurice J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524839, 524840, C08L 7504

Patent

active

050250647

ABSTRACT:
The present invention relates to a process for the production of aqueous dispersions of polyurethanes containing chemically incorporated carboxylate groups wherein the counterions to the carboxylate groups are predominantly ammonium ions corresponding to the formula ##STR1## by mixing a starting aqueous dispersion of polyurethanes containing chemically incorporated carboxylate groups wherein the counterions to the carboxylate groups are ammonium ions corresponding to the formula ##STR2## wherein R.sub.1, R.sub.2 and R.sub.3 are the same or different and represent C.sub.1-4 alkyl groups, provided that the total number of carbon atoms in these substituents is 3 to 6,
with at least an equivalent quantity of ammonia, based on the trialkyl ammonium ions, and subsequently removing under vacuum at least a portion of the displaced trialkyl amines and the excess ammonia, if present.

REFERENCES:
patent: 3479310 (1969-11-01), Dieterich et al.
patent: 4092286 (1978-05-01), Noll et al.
patent: 4237264 (1980-12-01), Noll et al.
patent: 4408008 (1983-10-01), Markusch
patent: 4764553 (1988-08-01), Mosbach et al.

Affiliated with

Also associated with

Rating

Process for the production of aqueous polyurethane dispersions does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the production of aqueous polyurethane dispersions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the production of aqueous polyurethane dispersions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-146425