Heat insulation material containing rosin ester polyol and preparation method thereof

Abstract

The invention discloses a heat insulation material containing rosin ester polyol and a preparation method thereof. The heat insulation material containing the rosin ester polyol is applied to heat insulation of solar water heaters, and the material is prepared from the following raw materials in parts by mass: 70-90 parts of rosin ester polyol, 70-135 parts of polymethylene polyphenyl polyisocyanate, 20-50 parts of expanded vermiculite, 5-8 parts of jute fiber, 8-15 parts of HFC-245fa, 2-5 parts of water-soluble silicone oil and 2-5 parts of quaternary ammonium salt. The preparation method ofthe heat insulation material is as follows: weighing the raw materials according to parts by mass, mixing, stirring uniformly at high speed, pouring into a mold and curing for 48h. The heat insulationmaterial disclosed by the invention has the advantages of small compression deformation, low coefficient of heat conductivity, good heat insulation effect, high heat resistance and flame retardance.

Description

technical field [0001] The invention relates to the technical field of polyurethane thermal insulation materials, and more specifically relates to thermal insulation materials containing rosin ester polyols used in solar water heaters for thermal insulation and a preparation method thereof. Background technique [0002] With the increasing shortage of energy and the increasing pressure on environmental protection, countries around the world have begun to promote the development of renewable energy, of which solar energy is the most widely used and developed renewable energy with the best development prospects, in addition to air energy and wind energy. , water energy, geothermal energy, etc. [0003] Polyurethane foam is made by mixing and pouring isocyanate and polyether composition into a mold or water tank cavity for foaming. The polyether composition contains polyether polyol, foaming agent, catalyst, stabilizer, etc. The polyurethane foam molding process is simple , Po...

AI Technical Summary

Problems solved by technology

[0004] During the production process of rigid polyurethane foam, 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 cause the shell to deform. The mouth foam cracks, what's more, the hard polyurethane foam between the inner tank and the outer shell cracks horizontally or vertically, which greatly reduces its thermal insulation effect

Moreover, most of the existing polyurethane insulation materials are not high in heat resistance, poor in flame retardancy, and easy to burn

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