Water-blown polyurethane sealing devices and compositions for pr

Details Water-blown polyurethane sealing devices and compositions for pr Water-blown polyurethane sealing devices and compositions for pr

1995-10-26

1996-07-23

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521160, 528 59, 528 67, 528 76, C08G 1810

Patent

active

055390099

ABSTRACT:
Disclosed as a particular isocyanate prepolymer composition particularly suitable for use in polyurethane compositions having particular applicability for producing microcellular molded polyurethane articles particularly suitable for use as sealing devices. In particular, the isocyanate prepolymer composition is the result of reacting an isocyanate blend (a) having
(i) 0 to 10 pbw 2,4'-diphenylmethane diisocyanate;
(ii) 40 to 90 pbw 4,4'-diphenylmethane diisocyanate;
(iii) 1 to 10 pbw 3-ring oligomers of polymethylene polyphenyl polyisocyanate;
(iv) 1 to 20 pbw of n-ring oligomers of polymethylene polyphenyl polyisocyanate (n being greater than 3); and
(v) 1 to 10 pbw of a mixture of uretonimine with from 5 to 50 parts by weight of a propoxylated propylene glycol (b) having a number average molecular weight of between 2000 and 6000, and a hydroxyl number of between 10 to 75. The resulting isocyanate prepolymer (I) has a free NCO of from 20 to 30 and a viscosity of from 50 to 500 cPs.

REFERENCES:
patent: 3591532 (1971-07-01), Abercrombie et al.
patent: 3607976 (1971-09-01), Hsieh et al.
patent: 3834578 (1974-09-01), Smith et al.
patent: 3862879 (1975-01-01), Barron et al.
patent: 4190711 (1980-02-01), Zdrahala et al.
patent: 4287307 (1981-09-01), Hostettler et al.
patent: 4312973 (1982-01-01), Critchfield et al.
patent: 4321333 (1982-03-01), Alberino et al.
patent: 4374210 (1983-02-01), Ewen et al.
patent: 4374218 (1983-02-01), Tay
patent: 4377645 (1983-03-01), Guthrie et al.
patent: 4497914 (1985-02-01), Allen, Jr. et al.
patent: 4532316 (1985-07-01), Henn
patent: 4559366 (1985-12-01), Hostettler
patent: 4561858 (1985-12-01), Allen, Jr. et al.

Affiliated with

Also associated with

Rating

Water-blown polyurethane sealing devices and compositions for pr does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Water-blown polyurethane sealing devices and compositions for pr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Water-blown polyurethane sealing devices and compositions for pr will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-713464