Polyester polyol highly compatible with pentane as well as preparation method and application of polyester polyol

The invention discloses polyester polyol highly compatible with pentane as well as a preparation method and application of the polyester polyol, and belongs to the technical field of high polymer chemistry. The polyester polyol highly compatible with pentane is prepared from the following raw materials in parts by weight: 100 parts of diphenyldicarboxylic acid; 20 to 25 parts of phthalic anhydride; 120 to 125 parts of diethylene glycol; 50 to 55 parts of unsaturated fatty acid; 10 to 12 parts of neopentyl glycol; 10 to 12 parts of glycidyl palmitate; 0.5 to 1 part of a catalyst; wherein the unsaturated fatty acid comprises at least one monounsaturated fatty acid and at least one polyunsaturated fatty acid. The preparation raw materials provided by the invention are mixed according to corresponding parts by mass, and are heated in stages at variable temperature in a reaction kettle under the protection of nitrogen to generate chemical reaction, so that the polyester polyol which has high functionality and is h