CN1140188A

CN1140188A - Method for producing building paint

Info

Publication number: CN1140188A
Application number: CN 96104279
Authority: CN
Inventors: 李春潮
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-04-12
Filing date: 1996-04-12
Publication date: 1997-01-15
Anticipated expiration: 2016-04-12
Also published as: CN1058282C

Abstract

A process for preparing building paint features that among used fillers, there is dolomite with molecular formula of MgCO3.CaCO3. After calcining and hydration, dolomite ash with molecular formula of Mg(OH)2.Ca(OH)2 is obtained, which then reacts with CO2 in air to generate magnesium carbonate and calcium carbonate. As said dolomite ash has gelling property and high stability and hardness after air hardening, the properties of paint such as water, brush, alkali, and freeze thaw resistances, weatherability, and adhesion are greatly improved, and the amount of adhesive used in paint is reduced.

Description

A kind of manufacture method of building coating

The present invention relates to a kind of manufacture method of building coating.

Up to the present, water soluble paint for building generally is compound formulated by mineral dye, filler, chemical assistant and tackiness agent.The performance of coating and cost depend on selected tackiness agent.The coating that with the water soluble resin is tackiness agent is low-grade coating, and as 106,107 coating etc., its cost is lower, but exists water tolerance, abrasion resistance, weathering resistance, adhesion strength poor, easily efflorescence, peel off, shortcoming such as flavescence.Though its performance of coating that with the synthetic resin emulsion is tackiness agent is better, the production process complexity, cost is too high, has been subjected to very big restriction so it is promoted the use of.In order to solve above-mentioned contradiction, the professional research institution of domestic some all is that the coating glue stick with the development high-performance and low-cost is a research direction, but does not make a breakthrough so far.

The manufacture method that the purpose of this invention is to provide a kind of building coating, make the coating of producing with present method have the excellent properties such as water-fast, weather-proof, freeze-thaw-, alkali resistance and adhesion strength height of synthetic resin emulsion class coating, have the low price of water soluble resin coating simultaneously.

In order to achieve the above object, building coating disclosed in this invention comprises in polyvinyl alcohol water soluble resin or synthetic resin emulsion, filler, pigment, chemical assistant and water, the used filler and comprises component A that component A is that molecular formula is Mgco ₃Caco ₃The calcined dolomite in powder that obtains after the aquation through calcining of rhombspar, the molecular formula of calcined dolomite in powder is Mg (OH) ₂Ca (OH) ₂

The degree of component A in coating is 15～25%;

The degree of component A in coating is preferably 18～23%.

Above-mentioned polyvinyl alcohol water soluble resin can select for use the urea hydroformylation to handle polyvinyl formal, and its degree in coating is 20%～40%.If use synthetic resin emulsion, then its degree in coating is 5%～20%.Include the phosphoric acid solution of quickly penetrating agent " T " and 10% concentration in the chemical assistant, their degree is respectively 0.01%～0.02% and 1%～2.5%.

Technological process of the present invention comprises the following steps successively

Grind---filtration---packing after going into the defoamer lather collapse.Perhaps in above-mentioned processing step, poly-by the following step after adding urea hydroformylation processing polyvinyl formal:

---packing.

Because the present invention includes component A in prescription, the main component of component A is Mg (OH) ₂, Ca (OH) ₂, Mg when paint brush is on buildings (OH) ₂Ca (OH) ₂With airborne CO ₂Reaction generates CaCO ₃And MgCO ₃, MgCO wherein ₃The speed that generates is than CaCO ₃Faster, and MgCO ₃Chemical property stable, have higher hardness and gelling, tackiness agent and filler compound action in they and the coating have improved the water-fast of coating greatly, washability, alkaline-resisting, freeze-thaw-, weathering resistance have improved adhesion strength.This coating is as follows through pressing exterior wall coating material of synthetic resin emulsion GB9755-88 standard test result: more than the water tolerance 96h, more than the alkali resistance 48h, freezing and thawing test is more than 10 times

Accelerated aging test is more than 250 hours

The test of scrubbing property is more than 1000 times

More than the adhesion strength 0.5MPa

Main performance index is the conformance with standard regulation all, by the thin matter decorative paint industrial standards JISA6909 of Japan---1984 prescriptive procedures test, adhesion strength can reach 1.0MPa, on the other hand, because the gelling of calcined dolomite in powder, thereby the performance that makes coating is not mainly determined by the performance of the glue paste that is adopted, but by the compound action of calcined dolomite in powder and tackiness agent, even mainly be that gelling by calcined dolomite in powder self is determined, thereby greatly reduce the consumption of tackiness agent in the prescription, thereby greatly reduce the production cost of coating.

The effect that adds quickly penetrating agent " T " and phosphoric acid solution in prescription is that component A is disperseed in water fast, and improves the stability that coating is stored.

The present invention has created new field for the utilization of the very abundant rhombspar of China's reserves, has opened up the new direction of coating research, is domestic initiation.

The present invention is done the explanation of detail below in conjunction with embodiment:

Embodiment 1: interior wall coating

The water of adding 31.14% and 0.1% Sodium hexametaphosphate 99 in decollator, add component A15% behind the dispersing and dissolving, disperse the back to add the phosphoric acid solution 1.25% of quickly penetrating agent " T " 0.01% and 10% concentration, add light calcium carbonate 8.5% after the dispersion successively, wollastonite 1.5%, talcum powder 2.5%, the back that is uniformly dispersed adds the urine hydroformylation and handles formaldehyde polyvinyl acetal 40%, mix the back and add the defoamer tributyl phosphate, can pack after grinding behind the lather collapse, filtering.

Embodiment 2: interior wall coating

The water of adding 37.865% and 0.12% Sodium hexametaphosphate 99 in decollator, add component A22.5% behind the dispersing and dissolving, disperse the quickly penetrating agent " T " of back adding 0.015% and the phosphoric acid solution 2% of 10% concentration, add 2.5% light calcium carbonate, 2.5% wollastonite, 2.5% talcum powder after the dispersion successively, the urea hydroformylation of adding 30% is handled formaldehyde polyvinyl acetal after being uniformly dispersed, mix the back and add the defoamer tributyl phosphate, behind the lather collapse, grinding and filtering the back is finished product.

Embodiment 3: exterior coating

The water of adding 34.32% in decollator, 0.16% Sodium hexametaphosphate 99, the dissolving back adds 25% component A, adding 0.02% quickly penetrating agent " T " and concentration are 10% phosphoric acid solution 2.5% after disperseing, add 1.5% titanium dioxide after being uniformly dispersed successively, 2.5% light calcium carbonate, 2% wollastonite and 2% talcum powder, after being uniformly dispersed, add 30% urea hydroformylation processing formaldehyde polyvinyl acetal again, mix the back and add the defoamer tributyl phosphate, behind the lather collapse, grind, filter, be finished product.

Embodiment 4: interior wall coating

The water of adding 45.39% in decollator, 0.1% Sodium hexametaphosphate 99, the dissolving back adds component A15%, and the phosphoric acid solution 1% of quickly penetrating agent " T " 0.01% and concentration 10% makes its dispersion; Add light calcium carbonate 8.5% more successively, wollastonite 2%, talcum powder 3%, the back that is uniformly dispersed adds the urea hydroformylation and handles formaldehyde polyvinyl acetal 5%, dispersing and mixing; Add polyvinyl acetate emulsion 20%, mix the back and add the defoamer processing; Filtration is finished product.

Embodiment 5: interior wall coating

The water of adding 42.795% in decollator, behind 0.15% Sodium hexametaphosphate 99 and 0.04% the ultramarine dispersing and dissolving, add component A22.5%, disperse the quickly penetrating agent " T " of back adding 0.015% and the phosphoric acid solution 2% of concentration 10%, back adding light calcium carbonate 2.5% is uniformly dispersed, wollastonite 2.5%, talcum powder 2.5%, disperse the back to add the urea hydroformylation and handle formaldehyde polyvinyl acetal 10%, add polyvinyl acetate emulsion 15% after being uniformly dispersed again, mix the back and add the defoamer tributyl phosphate, can pack after filtering at last.

Embodiment 6: exterior coating

The water of adding 36.885% in decollator, 0.16% Sodium hexametaphosphate 99,0.04% ultramarine and 0.2% calcium chloride, the component A of adding 25% behind the dispersing and dissolving, disperse the quick penetration enhancer " T " of back adding 0.015% and 15% urea hydroformylation to handle formaldehyde polyvinyl acetal, the concentration of adding 2.2% is 10% phosphoric acid solution after being uniformly dispersed, add 1.5% titanium dioxide after being uniformly dispersed successively, 2.5% light calcium carbonate, 2% wollastonite and 2% talcum powder, the polyvinyl acetate emulsion of adding 12.5% after being uniformly dispersed mixes the back and adds tributyl phosphate, gets final product after the filtration.

Claims

1. the manufacture method of a building coating, it is made up of polyvinyl alcohol water soluble resin or synthetic resin emulsion, filler, chemical assistant and water, it is characterized in that: comprise component A in the used filler, component A is that molecular formula is MgCO ₃CaCO ₃The calcined dolomite in powder that obtains after the aquation through calcining of rhombspar, the molecular formula of calcined dolomite in powder is Mg (OH) ₂Ca (OH) ₂

2. the manufacture method of building coating according to claim 1, it is characterized in that: the weight percent content of component A in coating is 15%～25%.

3. the manufacture method of building coating according to claim 1, it is characterized in that: the weight percent content of component A in coating is 18%～23%.

4. according to the manufacture method of claim 2 or 3 described building coatings, it is characterized in that: the urea hydroformylation that described polyvinyl alcohol water soluble resin is a solid content 8～10% is handled polyvinyl formal, and its weight percent content in coating is 20%～40%; Described synthetic resin emulsion is the polyvinyl acetate emulsion of solid content 40%～50%, and its weight percent content in coating is 5%～20%; Include quickly penetrating agent " T " in the described chemical assistant, its weight percent content in coating is 0.01%～0.02%; Include concentration in the described chemical assistant and be 10% phosphoric acid solution, its weight percent content in coating is 1%～2.5%.

5. the manufacture method of building coating according to claim 4, it is characterized in that: the processing step of this method is as follows successively:

Add defoamer and---grind---filtration---packing.

6. the manufacture method of building coating according to claim 4, it is characterized in that: the processing step of this method is as follows successively: