Polyurethanes including pendant hindered amines and compositions

Details Polyurethanes including pendant hindered amines and compositions Polyurethanes including pendant hindered amines and compositions

1992-12-08

1994-10-11

Kight, III, John

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...

524838, 528 26, 528 28, 528901, 525453, 525459, C08G 1812

Patent

active

053548086

ABSTRACT:
Ungelled, aqueous dispersions of silane-terminated partially crosslinked polyurethane polymers are described which are the reaction product of A) an isocyanate-containing prepolymer formed from: (i) a molar excess of organic polyisocyanate sufficient to promote substantially equal access to isocyanate groups; (ii) active hydrogen-containing material; (iii) sterically hindered amines; (iv) emulsifying monomer; B) chain-extending monomer; C) an organic compound having a pKb of at most about 7; and D) a silane coupling agent represented by the general formula ASi(OR.sup.2).sub.3 and present in an amount sufficient to partially crosslink the polyurethane resin but insufficient to gel the dispersion, provide advantages over previously known polyurethanes used as surface coatings. The hindered amine allows surface coatings incorporating the polyurethanes to be easily removed by aqueous compositions having pH between about 2 and 5. Methods of making the prepolymers, polymers, and dispersions are also presented.

REFERENCES:
patent: 3253941 (1966-05-01), Finn et al.
patent: 3431209 (1969-03-01), Rosenfeld
patent: 3632557 (1972-01-01), Brode et al.
patent: 3903052 (1975-09-01), Wagner et al.
patent: 3979344 (1976-09-01), Bryant et al.
patent: 3983291 (1976-09-01), Chang
patent: 4020043 (1977-04-01), Siefken
patent: 4077896 (1978-03-01), Bunegar et al.
patent: 4222925 (1980-09-01), Bryant et al.
patent: 4345053 (1982-08-01), Rizk et al.
patent: 4348292 (1982-09-01), Gian
patent: 4567228 (1986-01-01), Gaa et al.
patent: 4587030 (1986-05-01), Casey
patent: 4598131 (1986-07-01), Prucnal
patent: 4628076 (1986-12-01), Chang et al.
patent: 5041494 (1991-08-01), Franke et al.
patent: 5061393 (1991-10-01), Linares et al.
patent: 5073195 (1991-12-01), Cuthbert et al.
patent: 5080822 (1992-07-01), VanEenam

Affiliated with

Also associated with

Rating

Polyurethanes including pendant hindered amines and compositions does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polyurethanes including pendant hindered amines and compositions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyurethanes including pendant hindered amines and compositions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1659189