Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1996-02-20
1997-12-02
Gorr, Rachel
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521159, 521164, 521166, 521176, 521173, C08G 1830
Patent
active
056936826
ABSTRACT:
A polyurethane foam essentially free of organic carbon-based blowing agent, the polyurethane foam comprising a foam core having a density of from about 5 to about 45 pounds per cubic foot and an integral skin consisting of substantially non-cellular, non-porous polyurethane. The presence of the integral skin is characterized by a compression force deflection index of at least about 1.20, the compression force deflection index being defined as the ratio of (i) the compression force deflection orthogonal to a cross-section of the foam to (ii) the compression force deflection of the foam core, the compression force deflection measured according to ASTM 3574C. In a preferred embodiment, the present polyurethane foam is further characterized by a flexural modulus index of at about 1.60. In another preferred embodiment, the present invention is characterized by a density index of at least about 1.60. These additional preferred features of the present polyurethane foam are further characteristics of a foam having a true integral skin. A process for producing a polyurethane foam having an integral skin using a blowing agent essentially free of organic carbon-based compounds is also described. The process comprising the steps of: contacting a polyol mixture, an isocyanate, an aqueous blowing agent, a catalyst and a chain extending agent to produce a reaction mixture, the polyol mixture consisting of a first polyol having an average equivalent weight greater than about 1000 and a second polyol having an average equivalent weight in the range of from about 150 to about 1000; and expanding the reaction mixture to produce the polyurethane foam. The present polyurethane foam can be used in a number of vehicular (e.g. steering wheel covers, arm rests, head rests, etc.) and non-vehicular (e.g. shoe-soling, furniture, toys, etc) applications.
REFERENCES:
patent: 4469823 (1984-09-01), Yeakey et al.
patent: 4554340 (1985-11-01), Heusch et al.
patent: 4590219 (1986-05-01), Nissen et al.
patent: 4994502 (1991-02-01), Markovs et al.
patent: 5132329 (1992-07-01), Lynch et al.
patent: 5234961 (1993-08-01), Tanis
patent: 5304573 (1994-04-01), Tamano et al.
patent: 5426124 (1995-06-01), Neuhaus et al.
patent: 5464879 (1995-11-01), Valoppi
"Flexible Polyurethane Foams" by R. Herrington, et al.; 1991, pp. 12.16-12.19.
The Polyurethanes Book; George Woods; 1987; pp. 88-100.
D. Klempner and K. Frisch; Polymeric Foams; 1991; pp. 66-67.
Bayko William M.
Kuczynski Edward T.
Gorr Rachel
Woodbridge Foam Corporation
LandOfFree
Integral skin foam and process for production thereof does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Integral skin foam and process for production thereof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Integral skin foam and process for production thereof will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-801812