Very low density molded polyurethane foams via isocyanate-termin

Details Very low density molded polyurethane foams via isocyanate-termin Very low density molded polyurethane foams via isocyanate-termin

1997-03-26

1998-01-13

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521159, C08G 810

Patent

active

057080453

ABSTRACT:
Very soft, very low density, all water-blown polyurethane foams are prepared by reacting an isocyanate-terminated prepolymer with from 30% to 150% stoichiometric excess of water. The foams have molded densities less than or equal to 1.5 lb/ft.sup.3 and softness, as measured by 25% ILD of less than or equal to 15 lbs., yet retain excellent resiliency, tear strength and elongation. The foams are suitable for use in cushioning applications such as those traditionally employing polyester fiberfill.

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R.E. Knox, "Molding of Prepolymer Based Resilient Urethane Foam", Rubber World, 139 (1959) 685.
G.F. Lunardon et al., "Production of Soft Block Foams & TDI Based Cold-Cure Molded Foams With No Use of CFC," 32nd Annual Tech/Mark. Conference, Oct. 1-4, 1989, pp. 239-240.

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