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Preparation method of calcium carbonate powder paint for external wall

A technology of exterior wall paint and calcium carbonate powder, which is applied in the direction of fireproof paint, coating, etc., can solve the problems of poor weather resistance, slow drying, short storage period, etc., and achieve the effect of good wear resistance, uniform color and easy to paint

Inactive Publication Date: 2017-05-31
张惠元
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] This application aims at the technical problems of slow drying, poor weather resistance, poor water resistance, short storage period and low adhesion of existing coatings, and provides a preparation method of calcium carbonate powder exterior wall coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take by weight 100 parts of calcium carbonate, 80 parts of water, 50 parts of polyvinyl formal, 40 parts of talcum powder, 40 parts of water glass, 15 parts of limestone, 5 parts of zinc oxide, 10 parts of precipitated barium sulfate, 4 parts of maleic anhydride, 2 parts of cobalt naphthenate, 1 part of urea, 2 parts of ammonia water, 3 parts of borax, and 8 parts of polyvinyl acetate emulsion.

[0028] Put water, polyvinyl formal, maleic anhydride, ammonia water and polyvinyl acetate emulsion into a reaction kettle equipped with a stirrer and a thermometer, raise the temperature to 40°C, stir for 30 minutes at a stirring speed of 400 rpm, add Water glass, zinc oxide, precipitated barium sulfate, cobalt naphthenate, urea and borax were heated up to 70°C and stirred at constant temperature for 40 minutes.

[0029] Raise the temperature to 90°C, add the remaining raw materials, heat-preserve and stir for 100 minutes at a stirring speed of 1000 rpm, grind with a sand mill,...

Embodiment 2

[0032] Take by weight 100 parts of calcium carbonate, 100 parts of water, 90 parts of polyvinyl formal, 80 parts of talcum powder, 60 parts of water glass, 55 parts of limestone, 25 parts of zinc oxide, 30 parts of precipitated barium sulfate, 8 parts of maleic anhydride, 8 parts of cobalt naphthenate, 5 parts of urea, 6 parts of ammonia water, 7 parts of borax, and 12 parts of polyvinyl acetate emulsion.

[0033] Put water, polyvinyl formal, maleic anhydride, ammonia water and polyvinyl acetate emulsion into a reaction kettle equipped with a stirrer and a thermometer, raise the temperature to 60°C, stir for 50 minutes at a stirring speed of 800 rpm, add Water glass, zinc oxide, precipitated barium sulfate, cobalt naphthenate, urea and borax were heated up to 90°C and stirred at constant temperature for 60 minutes.

[0034] Raise the temperature to 110°C, add the remaining raw materials, keep stirring for 120 minutes, and the stirring speed is 1200 rpm, grind with a sand mill,...

Embodiment 3

[0037]Take by weight 100 parts of calcium carbonate, 85 parts of water, 60 parts of polyvinyl formal, 50 parts of talcum powder, 45 parts of water glass, 25 parts of limestone, 10 parts of zinc oxide, 15 parts of precipitated barium sulfate, 5 parts of maleic anhydride, 3 parts of cobalt naphthenate, 2 parts of urea, 3 parts of ammonia water, 4 parts of borax, 9 parts of polyvinyl acetate emulsion.

[0038] Put water, polyvinyl formal, maleic anhydride, ammonia water and polyvinyl acetate emulsion into a reaction kettle equipped with a stirrer and a thermometer, raise the temperature to 40°C, stir for 30 minutes at a stirring speed of 400 rpm, add Water glass, zinc oxide, precipitated barium sulfate, cobalt naphthenate, urea and borax were heated up to 70°C and stirred at constant temperature for 40 minutes.

[0039] Raise the temperature to 90°C, add the remaining raw materials, heat-preserve and stir for 100 minutes at a stirring speed of 1000 rpm, grind with a sand mill, co...

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Abstract

The invention discloses a preparation method of calcium carbonate powder paint for an external wall. The preparation method comprises the following steps: 1) weighing calcium carbonate, water, polyvinyl formal, talcum powder, sodium silicate, lime stone, zinc oxide, precipitated barium sulfate, cis-butenedioic anhydride, cobalt naphthenate, urea, ammonia water, borax and polyvinyl acetate emulsion; 2) adding the water, the polyvinyl formal, the cis-butenedioic anhydride, the ammonia water and the polyvinyl acetate emulsion into a reaction kettle provided with a stirrer and a thermometer, keeping the heat and stirring; 3) continually adding the sodium silicate, the zinc oxide, the precipitated barium sulfate, the cobalt naphthenate, the urea and the borax, and keeping the temperature constant and stirring; 4) adding the residual raw materials after raising the temperature, keeping the heat and stirring, and grinding through a sand grinder; cooling and then filtering. A coating film is flat and smooth and has no brush marks; the fineness is 25mu m to 45mu m, the surface drying time is 30min to 50min, the hard drying time is 18h to 22h, and the elongation percentage of the coating film is 300MP to 500MPa; the paint has no caked paste and sediment, has uniform color and luster, is easy to brush and has no sagging; the heat resistance is not changed when the paint stays at 100 DEG C or lower for 1h to 5h; the adhesion force is 100 percent and the coating tensile strength is 2MPa to 4MPa.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a preparation method of calcium carbonate powder exterior wall coatings. Background technique [0002] Coating is one of the indispensable materials in the field of construction. Its main function is to protect the surface of buildings to make them waterproof, stain-resistant, heat-insulating or anti-ultraviolet. Advanced exterior wall coatings also have self-cleaning properties. It will fall in one rush. Existing architectural coatings generally contain film-forming emulsions (base materials), pigments, fillers, film-forming aids, defoamers and water, among which fillers are mostly inert substances such as talcum powder, which have poor acid and alkali resistance and waterproof performance , and the paint often cracks and peels off due to poor adhesion after construction, which cannot protect the exterior wall of the building and is not beautiful. [0003] Calcium carbonate is an impor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D129/14C09D131/04C09D5/18C09D7/12
CPCC09D129/14C08K2201/014C08L2201/02C08L2201/08C09D5/18C09D7/61C09D7/63C08L31/04C08K13/02C08K2003/265C08K3/34C08K2003/2296C08K2003/3045
Inventor 张惠元
Owner 张惠元
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