Rigid polyurethane foam plastic with constant temperature function and preparation method thereof

Abstract

The invention discloses rigid polyurethane foam plastic with a constant temperature function. The rigid polyurethane foam plastic is prepared from the following components in parts by weight: 70-90 parts of polyisocyanate, 50-80 parts by weight of a polyol, 4-10 parts by weight of a foaming agent, 0.5-1 part by weight of a catalyst, 1-5 parts by weight of an opening agent, 1-2 parts by weight of afoam stabilizer, 1-2 parts by weight of a cross-linking agent, 1-3 parts by weight of an outer foaming agent, 5-10 parts by weight of a phase change heat storage material, and 3-7 parts by weight ofexpanded graphite. According to the rigid polyurethane foam plastic and the preparation method thereof, the flame retardant property of the rigid polyurethane foam plastic can be remarkably improved,the rigid polyurethane foam plastic still has good mechanical properties at low density, meanwhile, the rigid polyurethane foam plastic has heat preservation and temperature adjustment functions, andthe usability of the rigid polyurethane foam plastic in the field of building materials is greatly improved.

Description

technical field [0001] The invention relates to the technical field of foamed plastics, in particular to rigid polyurethane foamed plastics with constant temperature function and a preparation method thereof. Background technique [0002] Rigid polyurethane foam (RPUF) is a structural material with excellent thermal insulation performance, which can withstand a certain load without obvious deformation. It also has low density, high specific strength, good dimensional stability, high temperature resistance and It has many advantages such as good adhesion with other substrates. Therefore, polyurethane rigid foam has been developed rapidly and has been widely used in various fields of the national economy, and has become one of the indispensable polymer materials. In foreign countries, polyurethane rigid foam is mainly used in the field of building insulation. In China, rigid polyurethane foam is mainly used in insulation fields such as refrigerators, freezers and pipes, and ...

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Problems solved by technology

[0003] At present, the main obstacle restricting the wide application of rigid polyurethane foam is its lack of flame retardancy. Simply adding flame retardant substances in the ingredients will cause a chain change in the reaction, which will affect the mechanical strength and quality stability of foam plastics; the second is the material It can only be used for heat preservation, but it does not have the function of temperature adjustment. When it is used as a building material, due to seasonal temperature changes, it can only be applied to extremely cold areas, and the scope of application is not large; the third is that although its mechanical strength and heat preservation performance Better, but the density of rigid polyurethane foam used in construction is usually greater than 150kg / m 3 , the density is still high, the cost of raw materials and transportation and installation costs are high, if the density is reduced, its toughness, tensile and shear strength and thermal insulation performance will drop significantly

These deficiencies greatly limit its wide application in the field of building materials

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