Coating liquid, non-combustible insulation board and preparation method of non-combustible insulation board

The invention relates to the field of building thermal insulation materials, and particularly discloses coating liquid, a non-combustible thermal insulation board and a preparation method of the non-combustible thermal insulation board. The coating liquid is prepared from 30 to 60 parts of flame retardant, 20 to 40 parts of styrene-acrylic emulsion, 10 to 25 parts of gum arabic, 12 to 18 parts of titanium dioxide and 150 to 200 parts of water. The non-combustible insulation board is prepared from EPS particles, a grouting material and the coating liquid, the weight ratio of the coating liquid to the EPS particles to the grouting material is 0.6: (0.8-1.5): (12-20), the heat conductivity coefficient of the non-combustible insulation board is 0.045 w/m.k or below, the combustion grade is A2 or above, and the compressive strength is 0.12-0.18 MPa. The preparation method of the non-combustible insulation board is simple to operate, easy to control and suitable for batch production. 本申请涉及建筑保温材料领域，具体公开了一种包膜液，不燃保温板及