High-strength polyurethane rigid foam as well as preparation method and application thereof

Abstract

The invention discloses high-strength polyurethane rigid foam, as well as a preparation method and application thereof. The invention introduces a benzoyl imide reinforced polyurethane modifier with a rigid structure; the benzoyl imide reinforced polyurethane modifier, the corresponding high-viscosity aromatic amine polyether polyol, low functionality polyether polyol, special silicon oil for increasing isotropy of the foam, a catalyst with a specific structure, water and a foaming agent are used for preparing the premixed polyether polyols and react with the polyisocyanates to generate the high-strength polyurethane foam. The polyurethane rigid foam provided by the invention has the characteristics of low batch charging density, high compressive strength, low heat conductivity coefficient and good size stability under low temperature, and can be used in the household appliance inside insulating materials such as the fridge, the refrigerator, the solar energy, the gas water heater and the disinfection cabinet.

Description

technical field [0001] The invention belongs to the technical field of polymer material foam plastics, and in particular relates to a high-strength polyurethane rigid foam plastic. technical background [0002] As a thermal insulation material, rigid polyurethane foam has good thermal insulation properties, flame retardant properties, high mechanical properties, etc., and has been widely used in refrigerators, solar energy, water heaters, buildings, pipelines, containers and other fields. In recent years, affected by national environmental protection policies, raw material costs, production efficiency, quality requirements, etc., customer manufacturers have higher and higher performance requirements for polyurethane rigid foam. [0003] Under the condition of a certain core density, the polyurethane foam needs to maintain a high compressive strength. The high strength ensures that the refrigerator will not experience local "shrinkage" during cooling and can strongly support ...

AI Technical Summary

Problems solved by technology

As an insulation material used in home appliance systems, customers have higher and higher requirements for the flame retardant performance of foam. The use of polyester polyol, reactive flame retardant polyether, and flame retardant additives in the formula has increased, and their use makes the foam more durable. Aging, demoulding, strength, fluidity and other performance deterioration

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