Preparation method of flame-retardant polyurethane foam for flat-plate solar collector

A technology of polyurethane foam and flat solar energy, which is applied in the field of polyurethane thermal insulation of flat solar collectors, to achieve the effects of good application, long-lasting flame retardancy, and improved heat utilization efficiency

Active Publication Date: 2013-02-06
ZIBO LIANCHUANG POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the temperature of the heat-absorbing plate core can be as high as 120-170°C when the light is strong, there are certain requirements for the heat resistance and flame retardancy of the insulation material, so the use of ordinary polyurethane materials alone cannot better meet the requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The high-temperature-resistant and flame-retardant polyurethane insulation material is formed by the reaction of component A and component B, the ambient temperature is 15-20°C, and the ambient humidity is 10%-20%;

[0023] The A component is a combined polyether polyol, consisting of 30 parts by mass of polyether polyol, 40 parts by mass of phthalic anhydride polyester polyol and 30 parts by mass of flame-retardant polyol, a total of 100 parts of polyol, and 2 parts by mass of composite catalyst 1. The foam stabilizer is 5 parts by mass and the blowing agent HCFC-141b is 19 parts by mass, stirred and mixed;

[0024] The B component is polymethylene polyphenyl polyisocyanate.

[0025] The polyether polyol is composed of sucrose polyether polyol and sorbitol polyether polyol with a mass ratio of 0.5:1.

[0026] The functionality of the sucrose polyether polyol is 4.3-4.5, and the hydroxyl value is 350-400 mgKOH / g.

[0027] The functionality of the sorbitol-type polyeth...

Embodiment 2

[0035] The high-temperature-resistant and flame-retardant polyurethane insulation material is formed by the reaction of component A and component B, the ambient temperature is 20-25°C, and the ambient humidity is 30%-40%;

[0036] The A component is a combined polyether polyol, consisting of 40 parts by mass of polyether polyol, 40 parts by mass of phthalic anhydride polyester polyol and 20 parts by mass of flame-retardant polyol, a total of 100 parts of polyol, and 5 parts by mass of composite catalyst 2 parts by mass of foam stabilizer, 12 parts by mass of blowing agent cyclopentane and 1.1 parts of water, stirred and mixed;

[0037] The B component is polymethylene polyphenyl polyisocyanate.

[0038] The polyether polyol is composed of sucrose polyether polyol and sorbitol polyether polyol with a mass ratio of 1:1.

[0039] The functionality of the sucrose-type polyether polyol is 4.5-5.0, and the hydroxyl value is 450-500 mgKOH / g.

[0040] The functionality of the sorbit...

Embodiment 3

[0048] The high-temperature-resistant and flame-retardant polyurethane insulation material is formed by the reaction of component A and component B, the ambient temperature is 30-35°C, and the ambient humidity is 60%-70%;

[0049]The A component is a combined polyether polyol, consisting of 35 parts by mass of polyether polyol, 35 parts by mass of phthalic anhydride polyester polyol and 30 parts by mass of flame-retardant polyol, a total of 100 parts of polyol, and 4 parts by mass of composite catalyst 3 parts by mass of foam stabilizer, 30 parts by mass of blowing agent HFC-245fa and 1.6 parts of water, stirred and mixed;

[0050] The B component is polymethylene polyphenyl polyisocyanate.

[0051] The polyether polyol is composed of sucrose polyether polyol and sorbitol polyether polyol with a mass ratio of 2:1.

[0052] The functionality of the sucrose-type polyether polyol is 5.0-5.5, and the hydroxyl value is 400-450 mgKOH / g.

[0053] The functionality of the sorbitol-t...

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Abstract

The invention relates to a preparation method of flame-retardant polyurethane foam for a flat-plate solar collector, belonging to the technical field of polyurethane insulation of the flat-plate solar collector. The high-temperature-resistant flame-retardant polyurethane insulation material is prepared through reaction of a component A and a component B, wherein the ambient temperature is 15-35 DEG C, and the ambient humidity is 10-70%. The polyurethane foamed plastic prepared according to the invention has good application on the flat-plate solar collector, can resist high temperature of 120-180 DEG C, and has a foam flame-retardant oxygen index more than 23, thus solving the problems that general polyurethane materials do not resist high temperature, are easy to burn and the like. No fire retardant transport phenomena exist in high-temperature service environment, heat collection tubes and other components cannot be eroded, and the flame retardant property can be maintained persistently. The foam has good heat-resisting and flame-retardant performances, thus not only providing good heat insulation performance and improving the heat utilization rate of a water heater, but also realizing safer and more convenient integration of the flat-plate solar collector and a building.

Description

technical field [0001] The invention relates to a method for preparing high-temperature-resistant and flame-retardant polyurethane foam for flat solar heat collectors, and belongs to the technical field of polyurethane heat preservation for flat solar heat collectors. Background technique [0002] The flat-plate solar collector is mainly composed of heat-absorbing plate core, transparent cover plate, heat insulation layer and shell. At present, there are various forms of insulation materials used for flat-plate solar collectors, glass wool or rock wool is still the majority, and polyurethane or phenolic mixed with glass wool or rock wool is also used, but due to materials such as glass wool or rock wool It has the disadvantages of high thermal conductivity, poor internal tightness of materials, easy moisture absorption, poor toughness, etc., which makes the overall heat preservation efficiency of flat solar collectors low and the service life is short. At the same time, thi...

Claims

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Application Information

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IPC IPC(8): C08G18/73C08G18/64C08G18/48C08G18/42C08J9/14C08G101/00
Inventor 李洪国邵秀英
Owner ZIBO LIANCHUANG POLYURETHANE
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