Advanced flame-retardant polyurethane spray foam material and preparation method thereof

Abstract

The invention relates to an advanced flame-retardant polyurethane spray foam material and a preparation method thereof. The advanced flame-retardant polyurethane spray foam material comprises an isocyanate component and a composite white material component. The advanced flame-retardant polyurethane spray foam material is mainly used for an external wall build thermal-insulation industry. The advanced flame-retardant polyurethane spray foam material has foam flame-retardant properties satisfying C-level flame-retardant requirements in the national standard GB8624-2006, a combustion increasing rate index less than 250W/s in a single burning experiment, a total heat release amount less than 10MJ in 600s in the single burning experiment, size stable shrinkage less than 1.5%, a smoke density SDR level of 10 to 30, a heat conductivity coefficient of 0.020 to 0.024W/m.K, and an oxygen index more than 32.

Description

technical field [0001] The invention relates to a highly flame-retardant polyurethane spray foam material and a preparation method thereof, belonging to the field of polyurethane foam. Background technique [0002] China is the largest construction market in the world, but more than 95% of China's new buildings are still high-energy buildings. my country's Ministry of Urban and Rural Housing and Construction has a specific target for building energy conservation. In 2010, new buildings in cities and towns across the country will achieve energy savings of 50%. Therefore, domestic rigid foam will be used in about 10% of the thermal insulation materials in the construction field, and the polyurethane thermal insulation material industry will develop considerably in the future. (The source of the article is Global Polyurethane Network) Polyurethane insulation materials are environmentally friendly and in line with the national development strategy. [0003] Since ordinary poly...

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Problems solved by technology

[0006] Patent CN200910186702.2 discloses a high-efficiency halogen-free flame-retardant polyurethane rigid foam and its preparation method. The polyurethane rigid foam is realized by adding inorganic flame retardant red phosphorus and flame retardant dimethyl methyl phosphate (DMMP for short). The advantage of this method is that it can produce a foam with better flame retardancy, but the addition of inorganic agent particles increases the difficulty of process mixing, and the storage stability of the system material and the dimensional stability of the foam after adding DMMP There will be some impact, which is not conducive to the large-scale production and use of foam

[0007] Patent CN201210196201.4 discloses a polyurethane spray insulation material. The spray polyurethane adopts a foaming process under the flame retardant DMMP system. Meet the E-class use requirements in GB8624-2006

[0008] At present, the polyurethane insulation materials on the market basically increase the flame retardancy of the foam by adding flame retardants, such as DMMP and tris(2-chloropropyl) phosphate (TCPP for short). With the addition of these flame retardants, the It leads to foam shrinkage, dimensional stability cannot meet the use requirements, and the simple use of flame retardants such as DMMP and TCPP can only reach the D-level flame retardancy in GB8624-2006, which cannot meet the use requirements of high flame retardancy

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