A kind of B1 class flame retardant polyurethane rigid foam for continuous line production and its preparation method and use

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 trimerization Catalysts are used to make up for it, resulting in poor fluidity of the foam and large heat release. It can be applied to low-speed production lines, but when the line speed is above 8m / min, the surface of the board will shrink.

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