Patent ID: 8883316

Claim:
A composite material comprising: a thermosetting mixture in an amount of 20-70 parts by weight, the thermosetting mixture including a liquid resin containing vinyl in an amount of more than 60% composed of carbon and hydrogen with its molecular weight being less than 11,000 g/mol, the liquid resin comprising 30%-75% of the weight of the thermosetting mixture, and a solid styryl resin of middle or low molecular weight with unsaturated double bonds having a molecular weight of 5,000-50,000 g/mol; wherein the solid styryl resin with unsaturated double bonds has the following structure formula: wherein, R is: —(CH2)X—CH═CH2, or —CH2—C6H4—CH═CH2; X is 1-3; n and m are natural numbers, and m/n=0.8˜9; wherein the solid styryl resin with unsaturated double bonds comprises 25%-70% of the weight of the thermosetting mixture; a fiberglass cloth in an amount of 10-60 parts by weight; a powder filler in an amount of 0-55 parts by weight; and a cure initiator in an amount of 1-3 parts by weight, based on 100 parts by weight of the composite material.