Abstract: A polyol combination having up to a total of about 100 parts by weight (1) from about 95.1 to about 99.9 parts by weight of a first polyol having a nominal average functionality higher than about 4.5, an equivalent molecular weight in the range of from about 1500 to about 2500, a hydroxyl value in the range of from about 25 to about 35 mg KOH/g and an ethylene oxide content in the range of from about 10 to about 30% by weight based on total weight of said first polyol, and (2) from about 0.1 to about 4.9 parts by weight of a second polyol having a nominal average functionality in the range of from about 2.2 to about 6, an equivalent molecular weight in the range of from about 1000 to about 3000 and an ethylene oxide content of at least 50% by weight based on total weight of said second polyol, wherein the polyol combination is essentially free of stably dispersed polymer particles.

Abstract: Polyol combination for the preparation of energy absorbing foam is provided, the polyol combination including (a) from 30 to 70 parts by weight of a polyol having a molecular weight in the range of from 2500 to 6500, a functionality in the range of from 2.5 to 6 and a primary hydroxyl content of at least 40%, optionally with a polymer stably dispersed therein; and (b) from 70 to 30 parts by weight of a rigid polyol having a molecular weight in the range of from 300 to 1000, a functionality in the range of from 2.5 to 6 and a hydroxyl value in the range of from 200 to 600, to a total of 100 parts by weight of (a) and (b). Using this combination, foams with a density of less than 50 kg/m.sup.3 are possible.

Abstract: Polyol combination for the preparation of energy absorbing foam is provided, the polyol combination including (a) from 30 to 70 parts by weight of a polyol having a molecular weight in the range of from 2500 to 6500, a functionality in the range of from 2.5 to 6 and a primary hydroxyl content of at least 40%, optionally with a polymer stably dispersed therein; and (b) from 70 to 30 parts by weight of a rigid polyol having a molecular weight in the range of from 300 to 1000, a functionality in the range of from 2.5 to 6 and a hydroxyl value in the range of from 200 to 600, to a total of 100 parts by weight of (a) and (b). Using this combination, foams with a density of less than 50 kg/m.sup.3 are possible.