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

A technology for solar water heaters and thermal insulation materials, applied in the field of polyurethane thermal insulation materials, can solve the problems of reducing the thermal insulation effect of the water tank, cracking of the foam of the vacuum nozzle, falling off of the foam and the shell, etc., and achieves safe and reliable processing, improved thermal insulation effect, and less addition amount. Effect

Inactive Publication Date: 2018-03-09
GUANGXI JIKUAN SOLAR ENERGY EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

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Effect test

Embodiment 1

[0023] A thermal insulation material for a water tank of a solar water heater and a preparation method thereof. The material is prepared by mixing and foaming DMI and a polyether polyol composition at a ratio of 1.2:1. The polyether polyol composition includes the following raw materials in parts by weight: 80 parts of glycerol glucoside polyether polyol, 15 parts of water, 6 parts of chitosan, 8 parts of dimethyl phosphate, HFC-356 1 part, N, N-dimethylcyclohexylamine 2 parts and foam stabilizer 1 part.

[0024] The foam stabilizer is silicone with Si-C chain.

[0025] The preparation method of described glycerol glucoside polyether polyol comprises the following steps:

[0026] (1) Add dry starch and propylene glycol into the reactor, add concentrated hydrochloric acid dropwise and mix well;

[0027] (2) Heat the mixture to 130°C and keep it warm for 12 minutes, then the mixture will become a pasty viscous liquid; then continue to react at 130°C for 1 hour, then cool down ...

Embodiment 2

[0036] An insulating material for a water tank of a solar water heater and a preparation method thereof. The material is prepared by mixing and foaming DMI and a polyether polyol composition at a ratio of 1:1. The polyether polyol composition includes the following raw materials in parts by weight: 70 parts of glycerol glucoside polyether polyol, 10 parts of water, 4 parts of chitosan, 6 parts of dimethyl methyl phosphate, HFC-356 0.5 parts, 1 part of N, N-dimethylcyclohexylamine and 0.5 parts of foam stabilizer.

[0037] The foam stabilizer is silicone with Si-C chain.

[0038] The preparation method of described glycerol glucoside polyether polyol comprises the following steps:

[0039] (1) Add dry starch and propylene glycol into the reactor, add concentrated hydrochloric acid dropwise and mix well;

[0040] (2) Heat the mixture to 130°C and keep it warm for 12 minutes, then the mixture will become a pasty viscous liquid; then continue to react at 130°C for 1 hour, then c...

Embodiment 3

[0049] An insulating material for a water tank of a solar water heater and a preparation method thereof. The material is prepared by mixing and foaming DMI and a polyether polyol composition at a ratio of 1.5:1. The polyether polyol composition comprises the following raw materials in parts by weight: 90 parts of glycerol glucoside polyether polyol, 8 parts of water, chitosan, 10 parts of dimethyl phosphate, 2 parts of HFC-356 , 4 parts of N, N-dimethylcyclohexylamine and 2 parts of foam stabilizer.

[0050] The foam stabilizer is silicone with Si-C chain.

[0051] The preparation method of described glycerol glucoside polyether polyol comprises the following steps:

[0052] (1) Add dry starch and propylene glycol into the reactor, add concentrated hydrochloric acid dropwise and mix well;

[0053] (2) Heat the mixture to 130°C and keep it warm for 12 minutes, then the mixture will become a pasty viscous liquid; then continue to react at 130°C for 1 hour, then cool down to be...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/14C08K5/5333C08B30/18C08G65/28C08G65/324C08G18/48C08G18/64F24S80/65
CPCC08B30/18C08G18/4081C08G18/4883C08G18/6484C08G65/2609C08G65/324C08J9/0038C08J9/146C08J2203/142C08J2205/10C08J2375/08C08K5/5333C08G2110/0025Y02E10/40
Inventor 马昭键谢刚杨明慧韦福达农芷凌邹义升
Owner GUANGXI JIKUAN SOLAR ENERGY EQUIP
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