Abstract: A method of making a hydroxyl terminated precursor for polyurethane is disclosed. The method comprises heating a vegetable oil-polyol mixture of modified vegetable oil containing about two or more hydroxyl groups per molecule and a polyether polyol having about two or more hydroxyl groups per molecule at a temperature of at least about 25 degrees Celsius and at a pressure of about 1 atmosphere. The mixture has a hydroxyl equivalent ratio of about 1:1 vegetable oil to polyol. The method further comprises mixing for at least about 10 minutes an isocyanate containing about two or more isocyanato groups per molecule at least about 25 degrees Celsius to the vegetable oil-polyol mixture at a molar equivalent ratio of at least 2:1 vegetable oil-polyol mixture to isocyanate to react the isocyanate with the mixture to form the hydroxyl terminated precursor.

Abstract: A method of making an isocyanato terminated precursor for polyurethane is disclosed. The method comprises heating an isocyanate containing about two or more isocyanato groups per molecule at a temperature of up to 80 degrees Celsius and at a pressure of about 1 atmosphere. The method further comprises mixing a modified vegetable oil comprising about two or more hydroxyl groups per molecule with the isocyanate at a molar equivalent ratio of at least 2:1 isocyanate to vegetable oil for a predetermined time period to form the isocyanato terminated precursor.

Abstract: A method of making an isocyanato terminated precursor for polyurethane is disclosed. The method comprises heating an isocyanate containing about two or more isocyanato groups per molecule at a temperature of up to 80 degrees Celsius and at a pressure of about 1 atmosphere. The method further comprises mixing a modified vegetable oil comprising about two or more hydroxyl groups per molecule with the isocyanate at a molar equivalent ratio of at least 2:1 isocyanate to vegetable oil for a predetermined time period to form the isocyanato terminated precursor.

Abstract: A molded polyurethane foam system utilizing hydrofluorocarbons and alkane hydrocarbons as the blowing agent. The molded polyurethane foam products of the invention have a high-density integral skin and a low-density core. The blowing agent can be the HFC, tetrafluoroethane (HFC-134a) chemical alone or a mixture of tetrafluoroethane (HFC-134a) with one or more of the following: alkanes (such as 2-methylbutane, pentane and heptane) and other inert volatile organic compounds with boiling points in the 15.degree.-100.degree. C. range (such as pentene and acetone).

Abstract: A baseball bat comprising a hollow metal core of varying diameter and a foam plastic body enveloping the core. The plastic body has a handle section and a hitting section that are separately molded so that said handle section is softer than said hitting section and can be of a different color when desired.