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Polyurethane and foamed cement microscopically-composite heat insulating material and preparation method therefor

A foamed cement and thermal insulation material technology, applied in ceramic products, other household appliances, applications, etc., can solve the problems of low strength, high brittleness, high bulk density, and achieve the effects of high weather resistance, improved comprehensive performance, and stable composite interface.

Active Publication Date: 2017-04-19
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the quality problems such as high brittleness, low strength and high bulk density of traditional foamed cement and the shortcomings that cannot be overcome by conventional modification means. Polyurethane foam and cement foam interpenetrate and coexist, the cell structure is stable, and the reinforcement effect is outstanding

Method used

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  • Polyurethane and foamed cement microscopically-composite heat insulating material and preparation method therefor
  • Polyurethane and foamed cement microscopically-composite heat insulating material and preparation method therefor
  • Polyurethane and foamed cement microscopically-composite heat insulating material and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Stir 100 parts of P.O.42.5 cement, 0.5 parts of PP chopped fiber, 2 parts of calcium formate, 1.5 parts of sodium dodecylbenzenesulfonate foam stabilizer with 50 parts of hot water at 45°C for 3 minutes according to the conventional method , quickly add 5 parts of hydrogen peroxide, and at the same time, stir at high speed for 10s, then pour into the mold, let it stand for 24hrs to demould, 48hrs to cut, then cured at room temperature to age and dried to constant weight.

[0029] (2), first 13 parts of crude diphenylmethane diisocyanate, 10 parts of polyether polyol, 0.2 part of polysiloxane polyether, 0.01 part of diisobutyltin dilaurate catalyst are mixed into a homogeneous slurry, and then the step (1) Submerge the prepared dry foamed cement in the slurry, take it out after the slurry is completely soaked into the foamed cement, and let it solidify for 2 hours;

[0030] (3) Immerse the foamed cement obtained in step (2) into water again, and with the diffusion an...

Embodiment 2

[0033] (1), 85 parts of P.O.42.5 cement, 15 parts of Class I fly ash, 1.0 parts of PP chopped fiber, 1.5 parts of calcium formate, and 2.0 parts of sodium lauryl sulfate foam stabilizer were mixed with 55 parts of 47 ℃ according to the conventional method. After stirring in hot water for 2 minutes, quickly add 5.3 parts of hydrogen peroxide, and at the same time stir at high speed for 10 seconds, then pour it into the mold, let it stand for 24 hours to remove the mold, cut it for 48 hours, and then cure it at room temperature until it reaches its age and dry it to constant weight.

[0034] (2), first 20 parts of polymethylene polyphenyl diisocyanate, 15 parts of polyether polyol, 0.4 part of polysiloxane polyether, 0.1 part of triethylenediamine catalyst are mixed into a uniform slurry, and then the step (1) Submerge the prepared dry foamed cement in the slurry, take it out after the slurry is completely soaked into the foamed cement, and let it solidify for 3 hours;

[0035] (3...

Embodiment 3

[0038] (1), 90 parts of P.C.32.5 cement, 10 parts of grade II fly ash, 0.7 part of PP chopped fiber, 1.0 part of calcium formate, 2.0 parts of α-alkenyl sulfonate sodium foam stabilizer with 47 parts of 40 according to the conventional method After stirring in hot water at ℃ for 2 minutes, quickly add 4.5 parts of hydrogen peroxide, and at the same time stir at high speed for 10 seconds, then pour into the mold, let it stand for 24 hours to demould, cut for 48 hours, and then cure at room temperature to age and dry to constant weight.

[0039] (2), first 10 parts of toluene diisocyanate, 9 parts of polyether polyols, 0.15 parts of polysiloxane polyethers, 0.2 parts of bis(dimethylaminoethyl) ether catalysts are mixed into a homogeneous slurry, and then the step ( 1) Immerse the prepared dry foamed cement in the slurry, take it out after the slurry is completely soaked into the foamed cement, and let it stand for 4 hours to solidify;

[0040] (3) Immerse the foamed cement obtai...

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Abstract

The invention provides a polyurethane and foamed cement microscopically-composite heat insulating material and a preparation method therefor and belongs to the field of organic / inorganic composite type building materials. The preparation method is characterized by comprising the steps: adding ingredients such as cement and a foam stabilizer according to the conventional method, preparing foamed cement through carrying out foaming with hydrogen peroxide, and then, carrying out room-temperature curing until the foamed cement reaches an age; and then, mixing isocyanate, polyether polyol, polysiloxane polyether and a catalyst so as to obtain uniform slurry, then, submerging the dried foamed cement in the slurry, taking out the foamed cement after the foamed cement is completely impregnated with the slurry, carrying out standing for 2 to 4 hours so as to cure the foamed cement, then, submerging the foamed cement in water again, and then, carrying out foaming in a manner that water molecules are in contact with incompletely-reacted isocyanate through diffusion and infiltration, thereby obtaining the microscopically-composite heat insulating material. According to the material, organic polyurethane foam and inorganic cement foam are mutually independent and coexist in an interpenetrating manner, and microscopic compounding among interfaces is achieved, so that the foamed cement has relatively high compressive strength and relatively low coefficient of thermal conductivity.

Description

technical field [0001] The invention relates to a polyurethane-foamed cement microcosmic thermal insulation material and a preparation method thereof, belonging to the field of organic / inorganic composite building materials. [0002] technical background [0003] In recent years, with the increasing depletion of energy and the continuous deterioration of the environment, energy conservation and emission reduction have become the general consensus of all countries in the world. The promulgation and implementation of various building energy-saving laws and regulations has made the development and application of building thermal insulation materials attract people's attention. As a new type of inorganic foam material, foamed cement has excellent characteristics such as heat insulation, flame retardant and fire prevention, low price and environmental protection, which can better meet the requirements of energy saving and heat preservation projects, but there are also thermal cond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B38/02C04B41/63
CPCC04B28/04C04B41/4884C04B41/63C04B2201/20C04B2201/32C04B2201/50C04B22/068C04B16/0633C04B24/04C04B24/20C04B38/02C04B18/08C04B24/16C04B41/4552C04B41/4558C04B41/4582
Inventor 潘春跃王健雁林益军
Owner CENT SOUTH UNIV
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