Application of homogeneous A2-grade polyurethane foam in thermal insulation material and preparation process of homogeneous A2-grade polyurethane foam

Abstract

The invention relates to the technical field of polyurethane foam, and in particular, relates to an application of homogeneous A2-grade polyurethane foam in a thermal insulation material and a preparation process of the homogeneous A2-grade polyurethane foam. The homogeneous A2-grade polyurethane foam is mainly prepared from a component A, a component B and a component C according to a weight ratio of (5.4-10.3):(4.5-6.7):(80-90); the component A is prepared by mixing the following raw materials in parts by weight: 80-88 parts of urethane combined polyether, 9-14 parts of a toughening agent, 1-2 parts of an opening agent, 1-2 parts of a smoke suppressant and 1-2 parts of a light stabilizer; the component B is prepared by mixing the following raw materials in parts by weight: 65-85 parts of polymethylene polyphenyl isocyanate and 20-30 parts of a diisocyanate monomer; and the component C is a modified inorganic particle filler. The combustion performance of the polyurethane foam reaches A2 level, the advantages of low heat conductivity coefficient, low water absorption, good dimensional stability and the like of rigid polyurethane foam are reserved, and the polyurethane foam can be widely applied to the field of thermal insulation materials.

Description

technical field [0001] The invention relates to the technical field of polyurethane foam, in particular to the application and preparation process of a homogeneous A2 grade polyurethane foam in thermal insulation materials. Background technique [0002] There are many varieties of thermal insulation materials, which can be divided into three categories: inorganic thermal insulation materials, organic thermal insulation materials, and composite thermal insulation materials. Inorganic insulation materials include rock wool board, vitrified bead insulation mortar, foam cement board, glass wool board, etc.; organic insulation materials include polystyrene board, polyurethane board, phenolic resin board, etc. According to the fire rating, it can be divided into Class A non-combustible type, B1 class flame retardant type and B2 class combustible type. At present, the fire protection level of thermal insulation materials has attracted great attention from all walks of life in the ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a homogeneous A2 grade polyurethane foam application in thermal insulation materials and its preparation process, to overcome the poor fireproof performance of polyurethane rigid foam thermal insulation materials in the prior art, uneven finished products, and A-grade thermal insulation materials. Deficiencies of crispness, easy pulverization, poor dimensional stability, and poor thermal insulation performance