Abstract: A flexible, latex-like polyurethane foam having the “feel” and comfort of a latex foam and an Indentation Force Deflection (25% IFD as low as 3 lbs.) and the method of making such foam by reacting a mixture of triol polyether polyols, namely, a) a major proportion of a triol polyol having a hydroxyl content of about 50-80%, a 10-25% ethylene oxide cap and a molecular weight of about 3,000-6,500, (b) a minor proportion of a polymer triol polyol, preferably SAN polyol, having a molecular weight of about 3,000-6,5000; and (c) a very minor amount of a triol polyol having a primary hydroxyl content of at least 50% and about 40-90% ethylene oxide cap and a molecular weight of from 1,000-6,000. The polyol mixture is reacted with a MDI isocyanate in the presence of a critical amount of from about 1.5 to about 3.5 parts by weight of water, an auxiliary blowing agent and an amine catalyst.

Abstract: A method of preparing polyurethane packaging foam for dispensing into a container in which an article is present to be packaged for shipping, wherein the temperature of the polyurethane foam being dispensed into the container is reduced, as is the maximum reaction exotherm temperature. The method involves reacting polymeric isocyanate and polyoxyalkylated polyol precursors in the presence of water as the blowing agent for the foam. A nucleating agent is present in at least one of the precursors and is present in an amount sufficient to reduce the dispensing temperature of the foam reaction product but also the exotherm as the reaction continues to completion. Incorporation of a nucleating agent into the isocyanate and polyol resin components results in a carbon dioxide blown polyurethane packaging foam preferably having a density of 0.2 lb./ft..sup.3 to 2.0 lb./ft..sup.3.

Abstract: The present invention relates to a method of producing flexible polyurethane foam having reduced discoloration which utilizes low molecular weight alkanes or mixtures thereof as auxiliary blowing agents. More particularly, the present invention relates to the use of auxiliary blowing agents which are linear or branched alkanes having boiling points above -50.degree. C. and below 100.degree. C.

Abstract: Preparing a flexible, polyurethane foam:(a) placing a polyol polyurethane foam-forming reaction mixture in a reaction zone and allowing the mixture to rise, thereby forming a partially cured cellular material,(b) applying a compressive force to the partially cured cellular material after the elapsing of a period of time after completion of the rise to thereby reduce the volume of the partially cured cellular material, and(c) removing the compressive force and completing the cure of the compressed cellular material.The cellular material has enhanced cushioning properties including a unique and superior feeling of comfort resulting from a soft touch yet with a deep firm support with an appropriate springiness to the foam. The polyol in the polyurethane foam-forming reaction mixture contains a mixture of(d) from 90-10 parts by weight of a polymer-polyol composition containing about 10-40% polymer solids, and(e) from 10-90 parts by weight of a base polyol having a molecular weight of at least 4500 up to 7000.