Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1991-06-10
1995-05-23
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521163, 521170, 521172, 521173, 521174, 521176, C08G 1814
Patent
active
054182581
ABSTRACT:
Substantially closed-cell rigid foams containing urethane, urea and biuret groups are produced by reacting an NCO terminated prepolymer with a compound having at least two isocyanate-reactive hydrogen atoms and a molecular weight of from about 400 to about 10,000 in the presence of a catalyst and water by any of the known techniques. The NCO terminated prepolymer is the reaction product of x parts by weight of an at least difunctional polyol having an OH value of less than 100 with y parts by weight of an at least difunctional polyisocyanate. The ratio of x to y is at least 1:10. The product foams are particularly useful as insulating materials.
REFERENCES:
patent: 3846347 (1974-11-01), Satterly
patent: 3846348 (1974-11-01), Horst et al.
patent: 3954825 (1976-05-01), Touhay, Jr. et al.
patent: 3975316 (1976-08-01), Villa
patent: 4436841 (1984-03-01), Rasshofer et al.
patent: 4792545 (1988-12-01), Takao et al.
patent: 4935460 (1990-06-01), Cassidy et al.
patent: 5013766 (1991-05-01), Hanusa
patent: 5064873 (1991-11-01), Snider et al.
patent: 5102923 (1992-04-01), Porosoff et al.
Scholl Hans-Joachim
Welte Rainer
Bayer Aktiengesellschaft
Cooney Jr. John M.
Gil Joseph C.
Kight III John
Whalen Lyndanne M.
LandOfFree
Process for the production of substantially closed-cell rigid fo 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 substantially closed-cell rigid fo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the production of substantially closed-cell rigid fo will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2140772