Heat preserving material of solar water heater water tank and preparation method thereof

Abstract

The invention discloses a heat preserving material of a solar water heater water tank and a preparation method thereof. The material is prepared by mixing and foaming DMI and polyether polyol composition according to the ratio of 1-1.5: 1, wherein the polyether polyol composition comprises glycerin glucoside polyether polyol, water, chiton, dimethyl methylphosphate, HFC-356, N, N-dimethyl cyclohexyl amine and a foam stabilizer. According to the heat preserving material, the used raw materials are nontoxic and harmless, so that adverse effects on human body and environment are avoided; the shortage of high contracting after foaming and forming is overcome; the phenomena such as deforming, bulging, edging and even cracking of the water tank can be avoided; and moreover, the heat preserving performance and the heat insulation performance of the water heater water tank can be ensured.

Description

technical field [0001] The invention relates to the technical field of polyurethane thermal insulation materials, in particular to a rigid polyurethane foam thermal insulation material applied to solar water heater water tanks 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, among which solar energy is the most widely used and developed renewable energy with the best development prospects, and has been widely used in various industries , the solar water heater industry is one of them. Our country is rich in solar energy resources and has broad prospects for solar energy utilization. At present, it is the first user and producer of solar water heaters in the world. [0003] At present, the insulation materials that can be used as water tanks mainly include polyurethane foam, phenol...

AI Technical Summary

Problems solved by technology

However, compared with traditional inorganic thermal insulation materials, non-flame retardant polymer foam materials, including polyurethane foam materials, have disadvantages such as flammability and fast flame propagation speed.

[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 the thermal insulation effect of the water tank

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