High-flame-retardancy polyurethane spraying foam prepared from crude TCPP product and method for preparing high-flame-retardancy polyurethane spraying foam

Abstract

The invention discloses high-flame-retardancy polyurethane spraying foam prepared from a crude TCPP product and a preparation method of the high-flame-retardancy polyurethane spraying foam. The high-flame-retardancy polyurethane spraying foam is prepared by mixing a component A and a component B according to a volume ratio of 1:(1-2), wherein the component A comprises the following components in parts by weight: 10-45 parts of high-functionality polyether polyol, 20-80 parts of polyester polyol, 10-55 parts of flame-retardant polyester polyol, 1-5 parts of a foam stabilizer, 1-10 parts of a catalyst, 0-5 parts of a chemical foaming agent, 20-50 parts of a physical foaming agent, 15-40 parts of the TCPP crude product and 0.1-5 parts of a special additive; and the component B is polymethylene polyphenyl polyisocyanate. According to the high-flame-retardancy polyurethane spraying foam and the preparation method thereof, the problem of heterogeneity of the component A is solved, and the preparation cost of the flame-retardant polyurethane spraying foam is reduced. The prepared component A is long in storage period, the foam flame retardant property is excellent, the dimensional stability at high and low temperatures is good, and the spraying foam can be used in the application fields of building walls, roofs, refrigeration house heat preservation and the like which have requirements on flame retardancy.

Description

technical field [0001] The invention relates to the technical field of polyurethane materials, in particular to a method for preparing high-flame-retardant polyurethane spray foam. Background technique [0002] Tris-(2-chloropropyl) phosphate, abbreviated as TCPP, has remarkable flame retardant effect, and has the functions of plasticizing, moisture-proof, anti-static, etc. It is widely used in the field of polyurethane as an additive flame retardant. [0003] The preparation of TCPP is well known to those skilled in the art, and is mainly synthesized by using phosphorus oxychloride and propylene oxide to react under certain conditions. After the reaction, the crude product of TCPP is obtained, and the finished product of TCPP needs to be refined through processes such as alkali washing, water washing, vacuum dehydration, and filtration. The refining process will generate a large amount of sewage, and the content of chloride ions in it is very high, which is difficult and e...

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Problems solved by technology

This refining process will produce a large amount of sewage, and the content of chloride ions is very high, which is difficult and costly to treat

[0004] The use of crude TCPP to prepare component A will easily lead to problems such as short storage period of component A (5-10 days at room temperature, and the system appears turbid), large odor of the composite material, and large amount of catalyst.

Existing patents CN 102558484 B, CN104119498 A, etc. do not mention the impact of TCPP crude products on the performance of flame-retardant polyurethane spray foam; meanwhile, in order to obtain a higher flame-retardant grade, solid particles are used, and the combined material is heterogeneous, which is easy to Clusters and deposits appear, which is not convenient for construction

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