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Production of urethane foams and laminates thereof

  • US 3,933,548 A
  • Filed: 08/19/1974
  • Issued: 01/20/1976
  • Est. Priority Date: 08/19/1974
  • Status: Expired due to Term
First Claim
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1. A method of forming a flexible polyurethane foam layer having uniform controlled film layer thickness,said method comprising,spreading a layer of a polyurethane reactants containing mixture over a carrier surface in a uniform layer thickness,said polyurethane reactants consisting essentially of an isocyanate and a hydroxyl terminated polyol having from 1 to 9% by weight thereof of an inorganic carbon dioxide producing blowing agent incorporated therein,and heating said layer to a temperature in the range of from 260°

  • F to 390°

    F to cause release of carbon dioxide in said mixture and formation of polyurethane foam in a uniform thickness final product.

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