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Heat preservation material for solar water heaters and preparation method of heat preservation material

A technology for solar water heaters and thermal insulation materials, applied in the field of thermal insulation materials for solar water heaters and its preparation, can solve unsolved problems such as the shrinkage rate of thermal insulation materials, and achieve the effects of not being easily deformed, reducing the chance of shrinkage, and having a small molding shrinkage rate

Inactive Publication Date: 2019-02-19
安徽兆拓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

[0003] The Chinese invention patent with the publication number CN107778840A discloses a polyether polyol foam insulation material for solar water heater water tanks. It has good flame retardant, antifreeze and thermal insulation properties, but it does not solve the problem of large shrinkage of thermal insulation materials after foaming

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This embodiment provides a thermal insulation material for solar water heaters, which is composed of the following raw materials in parts by weight: 80 parts of polyether polyol, 1 part of nonionic surfactant, 2 parts of special catalyst, 8 parts of foaming agent, inorganic resistance 4 parts of fuel, 3 parts of glass fiber, 1 part of foam stabilizer, 4 parts of methyl formate and 10 parts of water.

[0025] The polyether polyol in this embodiment is selected from propylene glycol polyethers with a molecular weight of 800-2000.

[0026] The nonionic surfactant of this embodiment is a block copolymer of polysiloxane, polyoxyethylene and polyoxypropylene.

[0027] The special catalyst of this embodiment is a homogeneous mixture of pentamethyldiethylenetriamine, triethylenediamine and 2,4,6-triphenol. The pentamethyldiethylenetriamine, triethylene The weight ratio of diamine and 2,4,6-triphenol is 3:10:8.

[0028] The foaming agent in this embodiment is a homogeneous mix...

Embodiment 2

[0037] This embodiment provides a thermal insulation material for solar water heaters, which is composed of the following raw materials in parts by weight: 90 parts of polyether polyols, 2 parts of nonionic surfactants, 3 parts of special catalysts, 10 parts of foaming agents, inorganic resistance 5 parts of fuel, 4 parts of glass fiber, 2 parts of foam stabilizer, 5 parts of methyl formate and 15 parts of water.

[0038] In this embodiment, polyether polyols are selected from propylene glycol polyethers with a molecular weight of 800-2000.

[0039] In this embodiment, the nonionic surfactant is a block copolymer of polysiloxane, polyoxyethylene and polyoxypropylene.

[0040]In this embodiment, the special catalyst is a homogeneous mixture of pentamethyldiethylenetriamine, triethylenediamine and 2,4,6-triphenol. The pentamethyldiethylenetriamine, triethylene The weight ratio of diamine and 2,4,6-triphenol is 3:10:8.

[0041] In this example, the blowing agent is a homogeneou...

Embodiment 3

[0050] This embodiment provides a thermal insulation material for solar water heaters, which is composed of the following raw materials in parts by weight: 100 parts of polyether polyol, 3 parts of nonionic surfactant, 4 parts of special catalyst, 12 parts of foaming agent, inorganic resistance 6 parts of fuel, 5 parts of glass fiber, 3 parts of foam stabilizer, 6 parts of methyl formate and 15 parts of water.

[0051] The polyether polyols in this embodiment are selected from trimethylolpropane polyethers with a molecular weight of 400-4000.

[0052] In this embodiment, the nonionic surfactant is a block copolymer of polysiloxane, polyoxyethylene and polyoxypropylene.

[0053] In this embodiment, the special catalyst is a homogeneous mixture of pentamethyldiethylenetriamine, triethylenediamine and 2,4,6-triphenol. The pentamethyldiethylenetriamine, triethylene The weight ratio of diamine and 2,4,6-triphenol is 3:10:8.

[0054] In this example, the blowing agent is a homogen...

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PUM

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Abstract

The invention belongs to the field of heat preservation of solar water heaters and particularly relates to a heat preservation material for the solar water heaters and a preparation method of the heatpreservation material. The heat preservation material is prepared from, by weight, 80-100 parts of polyether glycol, 1-3 parts of a non-ionic surfactant, 2-4 parts of a special catalyst, 8-12 parts of a foaming agent, 4-6 parts of an inorganic flame retardant, 3-5 parts of glass fibers, 1-3 parts of a foam stabilizer, 4-6 parts of methyl formate and 10-20 parts of water. The preparation method includes: (1) weighing polyether glycol, the non-ionic surfactant, the inorganic flame retardant, the foam stabilizer, the glass fibers, the special catalyst and water according to the parts by weight to obtain a mixture A; (2) weighing the foaming agent and the foam stabilizer according to the parts by weight, and well oscillating to obtain a mixture B; (3) mixing the A and B, pouring into a watertank cavity of the solar water heater to realize foaming, and opening after high-temperature curing. The heat preservation material is low in heat conductivity coefficient and low in molding shrinkage.

Description

technical field [0001] The invention belongs to the technical field of thermal insulation of solar water heaters, and in particular relates to a thermal insulation material for solar water heaters and a preparation method thereof. Background technique [0002] Solar water heaters are the main source of domestic hot water in all countries in the world, and my country is also the largest country in the use and production of solar water heaters in the world. Polyurethane rigid foam is often used as the main thermal insulation material for solar water heater tanks due to its low thermal conductivity and convenient molding. The maximum volume), often makes the foam volume finally smaller than the filled cavity volume, so that the foam and shell peeling phenomenon occurs; and due to the surface tension of polyurethane rigid foam foaming, the connection between the cell walls of the foam is not good, so that The pore size and connectivity are reduced, and the foam disappears and c...

Claims

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Application Information

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IPC IPC(8): C08L71/02C08L83/12C08K13/04C08K7/14C08K3/22C08J9/14
CPCC08J9/0061C08J9/0066C08J9/0085C08J9/0095C08J9/142C08J9/144C08J9/146C08J2203/12C08J2203/142C08J2203/202C08J2371/02C08J2483/12
Inventor 陆志鹏
Owner 安徽兆拓新能源科技有限公司