High resiliency polyurethane foams

Details High resiliency polyurethane foams High resiliency polyurethane foams

1978-03-27

1980-08-12

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

252182, 260 40TN, 260 4215, 260 4244, 521 99, 521110, 521113, C08G 1814

Patent

active

042174228

ABSTRACT:
Flexible polyurethane foams are prepared from polyols containing 0.1 to 5.0 percent by weight of an inorganic filler such as fumed silica having a pH value of 6-8.5 and an effective particle size of less than 7 microns. Foams molded from such polyols exhibit in some instances an improvement in some of the strength properties and do not alter substantially, the mold fill time. In addition, there is an improvement in foam porosity (air flow) as well as a reduction in the force required to crush foam articles.

REFERENCES:
patent: 2740743 (1956-04-01), Pace
patent: 3004921 (1961-10-01), Stossel
patent: 3150109 (1964-09-01), Ferrigno
patent: 3467606 (1969-09-01), Rice
patent: 3772222 (1973-11-01), Steward
patent: 3772224 (1973-11-01), Marlin
patent: 3775350 (1973-11-01), Junas
patent: 3909464 (1975-09-01), Anorga
patent: 3931062 (1976-01-01), Cobbledick
patent: 4022941 (1977-05-01), Prokai

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