Unsaturated polyester high-filling white primer for melamine veneer cabinet and preparation method of unsaturated polyester high-filling white primer

The invention provides an unsaturated polyester high-filling white primer for a melamine veneer cabinet and a preparation method of the unsaturated polyester high-filling white primer; the white primer is prepared from the following raw materials in parts by weight: 40 to 55 parts of unsaturated polyester resin, 5 to 15 parts of low-acid-value modified short-oil alkyd resin, 5 to 15 parts of styrene monomer, 25 to 45 parts of a filler, 1 to 3 parts of a thixotropic agent, 5 to 15 parts of titanium dioxide, 0.15 to 1 part of an auxiliary agent, 0.6 to 1 part of an accelerant and 0.6 to 1 part of an initiator; the filler is prepared from the following raw materials in parts by weight: 10 to 15 parts of sericite powder, 7 to 15 parts of quartz powder, 5 to 10 parts of talcum powder and 3 to 5parts of calcined kaolin; the content of styrene in the unsaturated polyester resin is 21-25%, and the viscosity of the unsaturated polyester resin is 1600-2000CPS. The white primer has the advantages of good adhesiveness, g