Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1991-07-31
1992-12-15
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521155, 521918, 34 79, C08G 1814
Patent
active
051717565
ABSTRACT:
A process for rapidly cooling porous foam material to prevent oxidation or autoignition of said foam. The process includes a first cooling step wherein cooled ambient air is drawn through the foam block thereby cooling, dehumidifying and removing fumes from said block before being vented, a second cooling step wherein cooled ambient air is drawn through the block for further cooling thereof, with sublimates in the block being condensed and redeposited within the block, and a third cooling step wherein ambient air is drawn through the material so as to remove remaining fumes, heat and moisture therefrom. The process of the present invention advantageously utilizes a foam formulation which includes an increased percentage of water for providing adequate foaming of the material while minimizing or obviating the need for including toxic auxiliary blowing agents in the formulation. In addition, the formulation may also have a lower TDI index as compared to formulations utilized in conventional cooling methods because TDI is condensed and recycled back into the foam. An apparatus especially configured and adapted for practicing the process of the present invention is also disclosed.
REFERENCES:
patent: Re32032 (1985-11-01), Pettingell
patent: 3061885 (1962-11-01), Rogers et al.
patent: 3874830 (1975-04-01), Carter et al.
patent: 3890414 (1975-06-01), Ricciardi et al.
patent: 4228076 (1980-10-01), Pettingell
patent: 4344903 (1982-08-01), Pascouet
patent: 4435523 (1984-03-01), Ponzielli
patent: 4537912 (1985-08-01), Griswold
patent: 4731208 (1988-03-01), Nakayama
J. H. Webb and A. C. M. Griffiths, Flexible Polyurethane Foam Slabstock Manufacture Through the Next Decade, 30th Annual Polyurethane Technical/Marketing Conference (1986) pp. 62-66.
Dai Dzung G.
Ricciardi Michael A.
Crain Industries, Inc.
Welsh Maurice J.
LandOfFree
Three stage cooling of porous materials does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Three stage cooling of porous materials, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Three stage cooling of porous materials will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2093127