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Heat insulation additive for building coating and preparation method

A technology of architectural coatings and additives, applied in the direction of reflection/signal coatings, etc., can solve the problems of limited application and poor dispersion of hollow glass microbeads, and achieve the effect of enhanced thermal insulation effect, stable product performance and long service life.

Inactive Publication Date: 2019-01-08
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the technical problem that the poor dispersion of hollow glass microspheres in coatings limits its application in thermal insulation coatings, the present invention proposes a preparation method of thermal insulation additives for architectural coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A heat-insulating additive for architectural coatings, the preparation method is as follows:

[0030] a. Add 20 parts by weight of polyvinyl alcohol colloid, 3 parts by weight of water-in-oil emulsifier Span-20, and 10 parts by weight of sodium bicarbonate into deionized water to mix, heat up to 45°C, and add 20 parts by weight during stirring Hollow glass microspheres, stirred for 20 minutes to make it fully mixed to obtain a mixed emulsion;

[0031] b. 15 parts by weight of vinyl acetate, 7 parts by weight of acrylic acid and 2 parts by weight of butyl acrylate are formulated as a precursor solution, added to the mixed emulsion prepared in step a, and the initiator azobisisobutylamidine hydrochloride is added , the dosage is 0.5% of the mass of the precursor solution, heated to 70°C for 2 hours, and then cooled to room temperature, adjusted to a pH value of 7, and then vacuum-dried to obtain coated hollow glass bead microcapsules; heat additives.

Embodiment 2

[0033] A heat-insulating additive for architectural coatings, the preparation method is as follows:

[0034] a. Add 40 parts by weight of polyvinyl alcohol colloid, 10 parts by weight of water-in-oil emulsifier Span-40, and 15 parts by weight of sodium bicarbonate into deionized water to mix, heat up to 50°C, and add 40 parts by weight during stirring Hollow glass microspheres, stirred for 50 minutes to make it fully mixed to obtain a mixed emulsion;

[0035]b, 40 parts by weight of vinyl acetate, 10 parts by weight of acrylic acid and 5 parts by weight of butyl acrylate are formulated as a precursor solution, added to the mixed emulsion prepared in step a, and the initiator azobisisobutylamidine hydrochloride is added , the dosage is 0.5% of the mass of the precursor solution, heated to 80°C for 3 hours, and then cooled to room temperature, adjusted to a pH of 7, and then vacuum-dried to obtain coated hollow glass bead microcapsules; heat additives.

Embodiment 3

[0037] A heat-insulating additive for architectural coatings, the preparation method is as follows:

[0038] a. Add 25 parts by weight of polyvinyl alcohol colloid, 5 parts by weight of water-in-oil emulsifier Span-20, and 12 parts by weight of sodium bicarbonate into deionized water to mix, heat up to 46°C, and add 25 parts by weight during stirring Hollow glass microspheres, stirred for 25 minutes to make it fully mixed to obtain a mixed emulsion;

[0039] b. 20 parts by weight of vinyl acetate, 8 parts by weight of acrylic acid and 3 parts by weight of butyl acrylate are formulated as a precursor solution, added to the mixed emulsion prepared in step a, and the initiator azobisisobutylamidine hydrochloride is added , the dosage is 0.5% of the mass of the precursor solution, heated to 85°C for 4 hours, and then cooled to room temperature, adjusted to a pH value of 7, and then vacuum-dried to obtain coated hollow glass bead microcapsules; heat additives.

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PUM

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Abstract

The invention relates to a heat insulation additive for a building coating and a preparation method, and belongs to the field of preparation of a building coating. The preparation method of the heat insulation additive for the building coating particularly comprises the following steps: a, adding poly vinyl alcohol cryogel, an emulsifier and sodium bicarbonate into water to mix, warming, stirringand adding hollow glass microspheres; and b, preparing a precursor solution by vinyl acetate, acrylic acid and butyl acrylate, adding the precursor solution into prepared mixed emulsion, heating to perform a thermal reaction, carrying out initiated polymerization, then cooling to the room temperature, regulating a pH value into 7, then carrying out vacuum drying to obtain enveloped hollow glass microsphere microcapsules, that is, the heat insulation additive for the building coating. The heat insulation additive for the building coating, which is prepared by the preparation method disclosed bythe invention, can improve reflectivity and weather resistance of the coating, reinforce a heat insulation effect of the coating and have the advantages of environmental protection and energy saving.

Description

technical field [0001] The invention relates to a heat-insulating additive for architectural paint and a preparation method thereof, belonging to the field of architectural paint preparation. Background technique [0002] It is clearly stipulated in the "Building Thermal Design Code" that in hot summer areas, architectural design must fully consider its thermal insulation requirements. Composite exterior wall thermal insulation coating can reduce the absorption of heat from the sun by effectively reflecting sunlight, reducing the heat conduction efficiency in the wall, and radiating the heat energy of the exterior wall through infrared rays. , To a certain extent, it blocks the conduction of heat from the outside of the wall to the interior, can significantly improve the indoor temperature, and reduce energy consumption, which has attracted more and more attention from the society. At this stage, the research is relatively mature and most of the exterior wall thermal insula...

Claims

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Application Information

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IPC IPC(8): C09D7/62C09D5/33C08F218/08C08F220/06C08F220/18
CPCC08F218/08C09D5/004C09D7/62C09D7/70C08F220/06C08F220/1804
Inventor 陈庆昝航
Owner CHENDU NEW KELI CHEM SCI CO LTD
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