B1-grade flame-retardant polyurethane rigid foam used for continuous line production as well as preparation method and usage thereof

Abstract

The invention discloses a B1-grade flame-retardant polyurethane rigid foam used for continuous line production and a preparation method thereof. According to the invention, a new polyester polyol comprising high temperature-resistant rigid groups with benzoylimino heterocyclic structures and a flame-retardant polyether polyol are used as principal raw materials; relevant flame-retardant silicone oil, a catalyst with a special structure, a liquid flame retardant, a foaming agent and the like are added therein to prepare a compound polyol; and the compound polyol is then reacted with polyisocyanate to generate a polyisocyanurate (PIR) foam with high index. The B1-grade flame-retardant polyurethane rigid foam disclosed by the invention is applicable to continuous line producing processes. Compared with traditional PIR sheet foams, the B1-grade flame-retardant polyurethane rigid foam has the advantages of stable foaming and durable flame-retardant performance. By introducing a reasonable collocation of new rigid polyesters and other accessory ingredients, less flame retardant addition is required in the formula to make the polyurethane foam reach a B1 level while excellent performances such as low feeding density, high strength, stable size and the like are endowed to the foam.

Description

technical field [0001] The invention relates to a B1 grade flame-retardant polyurethane rigid foam for continuous line production and a preparation method thereof, which belongs to the field of polymer materials and is used for manufacturing foam insulation materials for buildings. Background technique [0002] With the rapid development of urban construction, my country's building energy consumption has increased significantly year by year. According to statistics, my country's unit building energy consumption is 2-3 times that of Western Europe and North America at the same latitude, and has reached 32% of the energy consumption of the whole society. Coupled with the annual energy consumption of housing building materials production, the total energy consumption of buildings has reached 45% of the total energy consumption of the country, which has undoubtedly become a huge burden on the national economy. Therefore, since July 2010, my country has successively proposed a ser...

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Problems solved by technology

However, the effect of pure benzene ring structure on flame retardancy is not very obvious, and more amount (above 40wt%) must be added to make the foam reach the B1 level, which will make the foam ripen very slowly and require more trime

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