B2 grade flame retardation polyurethane foam material

Abstract

The invention belongs to the field of foam gap fillers, and especially relates to a B2 grade flame retardation polyurethane foam material. The B2 grade flame retardation polyurethane foam material comprises, by mass, 10-70 parts of polyether polyol I, 10-50 parts of polyether polyol II, 20-40 parts of mixed flame retardation polyether polyol III, 20-80 parts of paraffin, 3-5 parts of polyether modified polysiloxane, 2-4 parts of a catalyst, 200-350 parts of isocyanate, 40-80 parts of methyl ether, 30-90 parts of liquefied petroleum gas and 0-30 parts of TCPP; the molecular weight of the polyether polyol I is 1000, and the functionality of the polyether polyol I is 3; the molecular weight of the polyether polyol II is 400, and the functionality of the polyether polyol II is 2; and the mixed flame retardation polyether polyol III, is a mixed flame retardation polyether, the average molecular weight of the mixed flame retardation polyether polyol III is 1000, and the average functionality of the mixed flame retardation polyether polyol III is 2.6. The mixed flame retardation polyether polyol III is used, and the formula is improved, so true B2 grade flame retardation is realized, the oxygen index is 26 or above, the flame retardation grade of foam is substantially improved, and the flame retardation performance is stable.

Description

technical field [0001] The invention belongs to the field of foam caulking agents, in particular to a B2 grade flame-retardant polyurethane foam material. Background technique [0002] The full name of polyurethane foaming agent is one-component polyurethane foam caulking agent, commonly known as foaming agent, styrofoam, and PU caulking agent. It is the product of the cross combination of aerosol technology and polyurethane foam technology. It is a special polyurethane product filled with polyurethane prepolymer, blowing agent, catalyst and other components in a pressure-resistant aerosol can. When the material is sprayed from the aerosol can, the foamy polyurethane material will expand rapidly and react with the air or the moisture in the contacted substrate to form a foam. The cured polyurethane foam sealant foam has multiple effects such as caulking, bonding, sealing, heat insulation, and sound absorption. It is an environmentally friendly, energy-saving, and easy-to-us...

AI Technical Summary

Problems solved by technology

The remaining 5% of the so-called B2 grade flame retardant is usually achieved by adding the flame retardant tris(chloroisopropyl) phosphate (TCPP for short), but this type of flame retardant foam sealant is dimensionally stable due to the use of TCPP Poor performance, unstable flame retardant effect, etc., the specific formula is shown in Table 2

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