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Solar water heater water tank polyether polyol foam insulation material

A technology for solar water heaters and foam thermal insulation materials, applied in the field of polyurethane thermal insulation materials, can solve the problems of foam cracking, uneven mixing, and increased proportion, and achieve the effects of stable thermal insulation performance, avoiding deformation of water tanks, and reducing shrinkage rate.

Active Publication Date: 2016-02-03
宁夏塞上阳光新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The foaming method of multiple pouring takes a long time to be completely filled due to the many process steps, which increases the proportion of this "bad foam"
Furthermore, the foam at the junction formed by two adjacent pours, due to the difference in shrinkage, may easily cause the foam to crack when it is cold
[0008]3. Due to other reasons such as low technical level of production operators, poor production facilities, non-standard production process, etc., resulting in unscientific ratio of raw materials or uneven mixing, etc. Operation, seriously affect the performance of polyurethane rigid foam
[0009] Therefore, many polyurethane rigid foam manufacturers adopt methods such as increasing the thickness of the polyurethane rigid foam insulation layer or increasing the density of the filling foam, but thickening the polyurethane rigid foam layer increases the The external volume of the water tank and the amount of materials are expensive, and increasing the density of the foam filling will increase the product weight and thermal conductivity, which does more harm than good, and is not an ideal solution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The polyether polyol foam insulation layer of the solar water heater water tank is obtained by mixing and foaming isocyanate and polyether polyol composition. The formula of the material is as follows:

[0036] 70 parts of propylene glycol polyether with a molecular weight of 800-2000; 3 parts of dimethyl ether; 3 parts of glass fiber (ultrafine glass fiber with a diameter of 3-7 microns and a length of 2-4 mm); expanded perlite (Particle diameter is 10-100 nanometers) 5 parts;

[0037] Mix the above compounds uniformly to form a polyether composition, then mix and pour the same component isocyanate into the cavity of the solar water heater water tank for foaming at a mass ratio of 1:1.4, and then obtain the polyether polyether compound of the present invention after curing at high temperature. Alcohol foam insulation.

Embodiment 2

[0039] The polyether polyol foam insulation material for solar water heater water tank is obtained by mixing and foaming isocyanate and polyether polyol composition. The formula of the material is as follows:

[0040] 75 parts of polytetrahydrofuran with a molecular weight of 500-5000 terminal hydroxyl groups; 4 parts of dimethyl ether; 4 parts of glass fiber (ultra-fine glass fiber with a diameter of 3-7 microns and a length of 2-4 mm); expanded pearls 6 parts of rock (with a particle diameter of 10-100 nanometers);

[0041] Mix the above compounds evenly to form a polyether composition, then mix with toluene diisocyanate (TDI) at a mass ratio of 1:1.4 and pour it into the cavity of the solar water heater tank for foaming. Solar water heater water tank polyether polyol foam insulation material layer.

Embodiment 3

[0043] The polyether polyol foam insulation material for solar water heater water tank is obtained by mixing and foaming isocyanate and polyether polyol composition. The formula of the material is as follows:

[0044] 80 parts of trimethylolpropane polyether with a molecular weight of 400-4000; 5 parts of dimethyl ether; 5 parts of glass fiber (ultrafine glass fiber with a diameter of 3-7 microns and a length of 2-4 mm) ;7 parts of expanded perlite (with a particle diameter of 10-100 nanometers);

[0045] The above compounds are mixed uniformly to form a polyether composition, and then mixed with diphenylmethane diisocyanate (MDI) at a mass ratio of 1:1.4 and poured into the cavity of the solar water heater tank for foaming. After high temperature curing, the present invention can be obtained. The polyether polyol foam insulation material layer of the solar water heater water tank.

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Abstract

The invention relates to the technical field of polyurethane thermal insulation materials, and more specifically relates to a polyether polyol foam thermal insulation material applied to the thermal insulation of solar water heater water tanks. The thermal insulation material of the present invention is obtained by mixing and foaming components isocyanate and polyether polyol, and main raw materials such as dimethyl ether, glass fiber and expanded perlite are also added. The disadvantage of large shrinkage avoids the phenomenon of water tank deformation, bulging and even cracking, and ensures the thermal insulation performance and flame retardancy of the water heater tank.

Description

technical field [0001] The invention relates to the technical field of polyurethane thermal insulation materials, and more specifically relates to a polyether polyol foam thermal insulation material applied to the thermal insulation of solar water heater water tanks. 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] As we all know, for solar water heaters, the selection of water tank insulation materials is very impo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/48C08K7/24C08K7/14C08J9/08C08G101/00
Inventor 马昭键李益忠来光业陆俊行周帆谢刚林成刚杨明慧李证良孟庆良黄秋和莫明鑫
Owner 宁夏塞上阳光新能源科技有限公司