Fluorine-free polyurethane heat insulation material

Abstract

The invention discloses a fluorine-free polyurethane heat insulation material. The fluorine-free polyurethane heat insulation material is prepared through foaming the following raw materials: by weight, 60-80 parts of toluene diisocyanate, 40-60 parts of polyether polyol A, 20-30 parts of polyether polyol B, 1-3 parts of a catalyst, 1-3 parts of a fire retardant, 0.5-1 part of a foaming agent, 4-8 parts of silicone oil and 12-18 parts of deionized water. The fluorine-free polyurethane heat insulation material has the advantages of high strength, light mass, low heat conductivity, good dimension stability, good heat insulation effect, good wear and corrosion resistance, high-efficiency fire retardation ability, and realization of energy saving and environmental protection due to no use of a chlorofluorocarbon (CFC) foaming gent and use of cyclopentane as the foaming agent. A preparation method of the fluorine-free polyurethane heat insulation material has the advantages of simplicity, low cost, low device requirements, environmentally-friendly production process, easiness in industrial production, and suitableness for large-scale promotion and application.

Description

technical field [0001] The invention relates to the technical field of thermal insulation materials, in particular to a fluorine-free polyurethane thermal insulation material. Background technique [0002] Ordinary polyurethane insulation materials generally use polyether polyols with high functionality and high hydroxyl value to react with polyisocyanates to form cross-linked polymers. At present, polyurethane is used as insulation material, and its production volume is increasing. It has the advantages of high hardness, high compressive strength, good dimensional stability, light weight, low thermal conductivity, closed cell rate of more than 95%, and good anti-corrosion and wear resistance. It has a wide range of uses and can replace rubber, plastic, nylon, etc., and is used in airports, hotels, building materials, automobile factories, coal mines, cement factories, high-end apartments, villas, landscaping, etc. [0003] In the production process of polyurethane, due to ...

AI Technical Summary

Problems solved by technology

[0003] In the production process of polyurethane, due to various reasons such as its own characteristics, production process and production workers' operating skills, there is a common problem of foam shrinkage, which may easily cause part or all of the foam and the shell to fall off, and eventually lead to deformation of the shell and vacuum nozzle foam. Cracking, what's more, the hard polyurethane foam between the inner tank and the outer shell is cracked horizontally or vertically, which greatly reduces the insulation effect

In polyurethane rigid foam, the commonly used blowing agent is chlorofluorocarbon (CFC) blowing agent, but because chlorofluorocarbon (CFC) blowing agent has a destructive effect on the atmospheric ozone layer, in order to maintain the ecological environment, international conventions have stipulated it Strict restrictions and regulations have been imposed on the production and use of