| abstract |
The invention discloses polyisocyanurate foam and a preparation method thereof. The polyisocyanurate foam raw material contains polyether polyol taking bisphenol F as an initiator, and is prepared by stirring and mixing isocyanate, a polyol composition, a cross-linking agent, a catalyst, a flame retardant, a physical foaming agent, a surfactant and water in a specific ratio according to a specific blanking sequence. According to the invention, bisphenol F is used as an initiator of polyether polyol, so that better thermal stability can be provided, and the hydrolysis resistance of the material is improved by utilizing the characteristic that polyether polyol and polyester polyol have no ester bonds. The preparation method is simple to operate, is carried out at room temperature, and is suitable for large-scale production. |