Polyisocyanate compositions for the preparation of flexible poly

Details Polyisocyanate compositions for the preparation of flexible poly Polyisocyanate compositions for the preparation of flexible poly

1995-04-10

1996-02-13

Foelak, Morton

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

2521822, 560359, 521159, 521160, C07C26100, C08G 1810, C08G 1812

Patent

active

054912520

ABSTRACT:
The invention provides a liquid polyisocyanate prepolymer composition which is a result of combining about 50 to 90 percent by weight of an isocyanate blend (a.) having 55 to 75 weight percent 4,4'-MDI, 17 to 27 weight percent 2,4'-MDI, 1 to 10 weight percent 3-ring MDI oligomer, and 1 to 15 weight percent n-ring MDI oligomer (n greater than 3); about 5 to 30 weight percent of a polyhydroxy containing polyol (b.) having a molecular weight of from 700 to about 6,000, and about 5 to 15 weight percent of a toluene diisocyanate (c.). The resulting isocyanate prepolymer composition has a free NCO content of from about 20 to 40 weight percent and particularly desirable flow characteristics. The invention further provides a method of making an isocyanate prepolymer composition, a process of making a polyurethane foam utilizing the isocyanate prepolymer composition of the invention, and polyurethane foams produced by the disclosed process.

REFERENCES:
patent: 3124605 (1964-03-01), Wagner
patent: 3492251 (1970-01-01), Gemeinhardt
patent: 3909464 (1975-09-01), Anorga
patent: 4256849 (1981-03-01), Ick
patent: 4801644 (1989-01-01), Googan
patent: 4803229 (1989-02-01), Narayan
patent: 5132334 (1992-07-01), Gansen et al.

Affiliated with

Also associated with

Rating

Polyisocyanate compositions for the preparation of flexible poly does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polyisocyanate compositions for the preparation of flexible poly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyisocyanate compositions for the preparation of flexible poly will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-241696