Polyurethane heat insulation material

Abstract

The invention discloses a polyurethane heat insulation material, which is prepared from the following raw materials in parts by weight through foaming: 60 to 80 parts of toluene diisocynate, 40 to 60 parts of plant fiber based polyether polyol, 30 to 50 parts of plant oil based polyether polyol, 1 to 3 parts of catalysts, 0.5 to 1 part of foaming agents, 1 to 3 parts of silicone oil and 6 to 8 parts of deionized water. The polyurethane heat insulation material has the advantages of high intensity, light weight, low heat conductivity, good dimension stability, good heat insulation effect, good wear-resistant anti-corrosion performance and efficient flame-retardant capability; polyhydric alcohols are prepared from waste, waste grease and the like; the energy is saved; the environment is protected. In addition, the preparation process is simple; the cost is low; the equipment requirements are low; the environment-friendly effect is achieved in the production process; the industrial production is easy; the polyurethane heat insulation material is suitable for large-range popularization and application.

Description

technical field [0001] The invention relates to the technical field of thermal insulation materials, in particular to a 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 various reason...

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