CN1058282C

CN1058282C - Method for producing building paint

Info

Publication number: CN1058282C
Application number: CN96104279A
Authority: CN
Inventors: 李春潮
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-04-12
Filing date: 1996-04-12
Publication date: 2000-11-08
Anticipated expiration: 2016-04-12
Also published as: CN1140188A

Abstract

The present invention relates to a method for producing building paint. Filling materials used in the present invention contain calcined dolomite powder with the molecular formula of Mg(OH)2. Ca(OH)2 obtained by calcining and hydrating dolomite with the molecular formula of MgCO3. CaCO3, and the calcined dolomite powder can react with carbon dioxide in air to generate magnesium carbonate and calcium carbonate. Because the calcined dolomite powder has gelling performance, high stability after air hardening and high hardness, the present invention has the advantages of greatly improving the resistance to water, scrubbing, alkali, weather and freezing and melting and adhesive strength of the paint, decreasing the dosage of adhesives in the paint and reducing the cost of the paint.

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 tolerance, weathering resistance, 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 that tackiness agent, filler, pigment, chemical assistant and water forms.Tackiness agent can be the polyvinyl alcohol water soluble resin, also can be made up of polyvinyl alcohol water soluble resin and polyvinyl acetate emulsion.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, the weight percent content of component A in coating is 15%～25%.The production technique of this building coating comprises the following steps: successively

Perhaps in above-mentioned processing step, after adding urea hydroformylation processing polyvinyl formal, follow these steps to:

The weight percent content of component A in coating is preferably 18%～23%.

The polyvinyl alcohol water soluble resin can select for use the urea hydroformylation of solids content 8%～10% to handle the formaldehyde polyvinyl acetal stick, and the weight percent content of this tackiness agent in coating is 5%～40%; The solids content of described polyvinyl acetate emulsion is 40%～50%, and the weight percent content of this emulsion in coating is 5%～20%; Described fast penetrant T is that formal name used at school is the aniorfic surfactant of fast penetrant T for the dioctyl sodium sulfosuccinate popular name, and the weight percent content of fast penetrant T in coating is 0.01%～0.02%; The concentration of described phosphoric acid solution is 10%, and the weight percent content of this solution in coating is 1%～2.5%.

Because the present invention includes component A in prescription, the main component of component A is Mg (OH) ₂Ca (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 ₃Fast is many, and MgCO ₃Chemical property stable, have higher hardness and gelling, tackiness agent and filler compound action in they and the coating have improved water tolerance, washability, alkali resistance, freeze-thaw-, the weathering resistance of coating greatly, 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 JISA6909-1984 prescriptive procedure test of Japan, 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 fast penetrant T and phosphoric acid solution in the 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.

Below in conjunction with embodiment the present invention is done detailed explanation:

Embodiment 1. interior wall coatings

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 fast penetrant T 0.01% and 10% concentration, add light calcium carbonate 8.5%, wollastonite 1.5%, talcum powder 2.5% after the dispersion successively, the back adding urea hydroformylation that is uniformly dispersed is handled 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 coatings

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 fast penetrant 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 coatings

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

Embodiment 4. interior wall coatings

Add 45.39% water, 0.1% Sodium hexametaphosphate 99 in decollator, the dissolving back adds the phosphoric acid solution 1% of component A15%, fast penetrant T 0.01% and concentration 10%, makes its dispersion; Add light calcium carbonate 8.5%, the silicon ash right side 2%, talcum powder 3% more successively, the back adding urea hydroformylation that is uniformly dispersed is handled formaldehyde polyvinyl acetal 5%, add polyvinyl acetate emulsion 20% after the dispersing and mixing, mix the back and add the defoamer processing, be finished product after the filtration.

Embodiment 5. interior wall coatings

In decollator, add 42.795% water, 0.15% Sodium hexametaphosphate 99 and 0.04% ultramarine, add component A22.5% behind the dispersing and dissolving, disperse the fast penetrant T of back adding 0.015% and the phosphoric acid solution 2% of concentration 10%, back adding light calcium carbonate 2.5%, wollastonite 2.5%, talcum powder 2.5% are uniformly dispersed, 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 coatings

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 fast penetrant 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, mix the back and add tributyl phosphate, get final product after the filtration.

Claims

1. the manufacture method of a building coating, this building coating is made up of tackiness agent, filler, pigment, chemical assistant and water; Tackiness agent can be the polyvinyl alcohol water soluble resin, or is made up of polyvinyl alcohol water soluble resin and polyvinyl acetate emulsion, 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, the weight percent content of component A in coating is 15%～25%; The production craft step of this building coating is as follows successively:

After adding urea hydroformylation processing polyvinyl formal, follow these steps to:

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 18%～23%.

3. the manufacture method of building coating according to claim 1 and 2, it is characterized in that: the urea hydroformylation that described polyvinyl alcohol water soluble resin is a solids content 8%～10% is handled the formaldehyde polyvinyl acetal stick, and the weight percent content of this tackiness agent in coating is 5%～40%; The solids content of described polyvinyl acetate emulsion is 40%～50%, and the weight percent content of this emulsion in coating is 5%～20%; The weight percent content of described fast penetrant T in coating is 0.01%～0.02%; The concentration of described phosphoric acid solution is 10%, and the weight percent content of this solution in coating is 1%～2.5%.