DETAILED DESCRIPTION What is claimed is: 1.
A vegetable oil extended polyurethane system consisting essentially of the reaction product of an isocyanate terminated polyisocyanate with a polyol in the presence of vegetable oil, the vegetable oil being present in a range of from about 1 to 80%, by weight of the total extended system, and being selected from the group consisting of soybean, safflower, corn, sunflower, linseed, oiticica, coconut, cottonseed, peritta, palm, olive, rape and peanut oils and mixtures thereof.
2.
The system of claim 1, wherein said polyisocyanate is selected from the group consisting of aliphatic, cycloaliphatic and aromatic polyisocyanates.
3.
The system of claim 1, wherein said polyisocyanate is a polyisocyanate prepolymer prepared by reacting an excess of a polyisocyanate compound and a polyol.
4.
The system of claim 2, wherein said polyisocyanate is polymethylene polyphenylisocyanate or methylenediisocyanate.
5.
The system of claim 1, wherein said polyol is selected from the group consisting of castor oil, polyether polyols, hydroxyl-bearing homopolymers of dienes, hydroxyl-bearing copolymers of dienes, amine-based polyols, polymeric polyols and mixtures thereof.
6.
The system of claim 5, wherein said polyol is a hydroxyl terminated polybutadiene.
7.
A vegetable oil extended polyurethane system consisting essentially of the reaction product of an isocyanate terminated polyisocyanate with a polyol in the presence of vegetable oil, the vegetable oil being present in a range of from about 1 to 80%, by weight of the total extended system, and a plasticizer in a concentration of from about 1 to 50%, by weight of the total extended system, said vegetable oil being selected from the group consisting of soybean, safflower, corn, sunflower, linseed, oiticica, coconut, cottonseed, peritta, palm, olive, rape and peanut oils and mixtures thereof.
8.
The system of claim 7, wherein said plasticizer is selected from the group consisting of phthalates, adipates, gluterates, fumarates, sebacates, citrates, phosphates, polymeric esters, epoxidized vegetable oils and mixtures thereof
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Adhesives and Rubbers 
