CN103923541A

CN103923541A - Preparation method for universal alkali-resistant seal primer

Info

Publication number: CN103923541A
Application number: CN201310014556.1A
Authority: CN
Inventors: 许钧强; 肖和南
Original assignee: DOSHAN KANGWEI PAINT INDUSTRIAL Co Ltd
Current assignee: DOSHAN KANGWEI PAINT INDUSTRIAL Co Ltd
Priority date: 2013-01-15
Filing date: 2013-01-15
Publication date: 2014-07-16

Abstract

The invention relates to a preparation method for a universal alkali-resistant seal primer. The basic formula of the primer involves: 30%-60% of an emulsion, 5%-10% of titanium dioxide, 5%-15% of heavy calcium carbonate, 5%-15% of kaolin, 1%-3% of talc powder, 2%-6% of a film-forming assistant, 1%-5% of propylene glycol, 0.5%-3% of a thickening rheological agent, 2-5% of an assistant, and 10%-25% of deionized water. The seal primer has the advantages of strong permeability, excellent weather resistance, water resistance and adhesion, excellent sealing and anti-alkali properties, and higher alkali resistance and salting-out resistance, and is suitable for surface coating of interior and exterior walls, cement walls, concrete, gypsum boards, asbestos boards and the like.

Description

A kind of preparation method of all-round alkali-resistant sealing primer

Technical field

The present invention relates to a kind of preparation method of building coating priming paint, relate in particular to a kind of all-round alkali-resistant sealing primer of tertiary acrylic emulsion that is applicable to various coating for internal and external wall.

Background technology

Along with the high speed development of Building Trade in China, building coating becomes the material of main part of architecture inside and outside decoration gradually.Meanwhile, along with the progress of the reach of science, technology, people more and more pay close attention to the decorative quality of external wall.For fear of exterior coating through wind after a while, drench with rain, occur after Exposure to Sunlight that ornament layer fades, grows dim, peeling, the bad phenomenon such as come off, people are before exterior wall coating application, generally first brush the 1 alkaline-resisting seal coat in road, to improve weather resistance and the decorative effect of coating.The Main Function of alkaline-resisting seal coat used for building exterior wall: (1) removes substrate surface dust, foreign material, sealing basic unit, stops up porous matrix layer, increases foundation base intension and density.(2) make basic unit reduce moisture in absorbing coating, auxiliary agent, emulsion etc., the intensity of main stor(e)y coating can not be reduced, improved the bonding strength with basic unit simultaneously.(3) reduce separating out of basic unit's salt, bases, prevent that the variable color of decoration of exterior wall layer from growing dim, the accumulation of salt in the surface soil returns the bad phenomenon such as white, loss of adhesion, thereby extend its work-ing life.(4) evenly absorbing cover coating materials of complete totally enclosed basic unit, makes its color gloss consistent, improves the decorative effect of ornament layer.Therefore, alkali-resisting primer is the integral part of coating for internal and external wall system, and it has prevented the infringement to coat system, has protected again basic unit and body of wall to avoid the harmful effect of moisture and environment simultaneously.

Phenylpropyl alcohol seal coat is on the market all generally that the modulation of anionic emulsion forms, but has poor adhesive force, the shortcoming that alkali resistance is weak; Make for various reasons the particle diameter of negatively charged ion benzene emulsion relatively much bigger (general emulsion particle diameter be 0.1～10 μ m), surface tension is very large, generally be difficult to be penetrated in the tiny pore of ground inside, so can only rely on the density of substrate surface film and realize the effect of back cover.

The sealing acrylic priming paint that belongs to anionic emulsion together becomes film type to belong to physical film deposition mechanism, between polymer, can not there is chemical reaction of becoming film, just according to self moisture evaporation, polymer micelle is softening and then mutually push film forming under the effect of film coalescence aid, so paint film is not tight, space more more (good permeability), just because of the ventilation property of emulsion paint also become there is the accumulation of salt in the surface soil, the factor of the film defect such as saltout.After water drenches, water penetrates into paint film the inside, dissolves soluble salt wherein, has also dissolved water soluble alkali simultaneously, is partly dissolved thing along with water molecules migrates to substrate surface and CO ₂reaction generates salt, in the process of migration along with the continuous evaporation of moisture, the continuous crystallization of solute, if crystallization just easily causes coming off of paint film between paint film and ground, crystallization just forms the accumulation of salt in the surface soil and saltouts at coating surface.

Summary of the invention

The present invention selects tertiary acrylic emulsion, and this emulsion is to carry out copolymerization by tertiary ethylene carbonate monomer and acrylic ester monomer to form.Utilize on the alpha-carbon atom of tertiary carbon monomer and there is abundant alkyl, formed great space steric effect and shielding effect, not only also play a protective role to self but also to unit around; Simultaneously nonpolar due to alkyl, its homopolymer or have good weathering resistance, alkali resistance and water tolerance with the multipolymer of other monomers, can strengthen pigment wettability and dispersiveness, increases sticking power and the elasticity of coating.Tertiary ethylene carbonate has the feature of alkali resistant, sealing excellence, oleophilic drainage in addition.The tertiary acrylic emulsion that the present invention selects has more tiny particle diameter, and to the good penetrability of base material, and alkali resistance is strong; And have self-crosslinking, and can improve polymerization crosslinking density, improve closure.So the seal coat perviousness that the present invention makes is strong, good weathering resistance, water tolerance and sticking power, excellent closure and alkali-resistivity, have higher alkali resistant, salting-out resistance energy.

In order to solve technical problem recited above, the present invention takes following technical scheme: the present invention relates to a kind of all-round alkali-resistant sealing primer, its basic recipe is: emulsion 30%～60%, titanium dioxide 5%～10%, water-ground limestone 5%～15%, kaolin 5%～15%, talcum powder 1%～3%, film coalescence aid 2%～6%, propylene glycol 1%～5%, thickener rheology agent 0.5%～3%, auxiliary agent 2%～5%, deionized water 10%～25%.

Wherein, emulsion is selected the tertiary acrylic emulsion of self-crosslinking alkali resistant.

Titanium dioxide is selected one or more combination of rutile titanium white powder or anatase thpe white powder.

Water-ground limestone is selected 1000 object powders.

Kaolin is selected 1000 object powders.

Talcum powder is selected 1000 object powders.

Film coalescence aid is selected one or more combination of glycol ether, diethylene glycol ether, propylene glycol and alcohol ester-12.

Auxiliary agent at least comprises one or more combination of dispersion agent, wetting agent, defoamer, PH conditioning agent and anticorrosion and bactericidal agent.

Thickener rheology agent is one or more combination of association type acrylate, hydrophobic association type polyurethane and Natvosol.

It is as follows that the present invention proposes a kind of preparation method preparation technology that all can alkali-resistant sealing primer: by formulation weight ratio, water, defoamer, dispersion agent, wetting agent and sterilant are added in stirred pot, after being uniformly dispersed, low speed adds powder titanium dioxide, calcium carbonate, high ridge scholar and talcum powder, then high speed dispersion 15min～30min, after the fineness of slurry is qualified, under middling speed state, add tertiary acrylic emulsion, then at the uniform velocity add film coalescence aid, the good viscosity of stirring and adjusting and pH value, make a kind of all-round alkali-resistant sealing primer.

The seal coat perviousness that the present invention makes is strong, good weathering resistance, water tolerance and sticking power, and excellent closure and alkali-resistivity, have higher alkali resistant, salting-out resistance energy.Be applicable to the application on the surfaces such as interior exterior wall, cement wall, concrete, plasterboard, asbestos plate.

Embodiment

Preparing material according to the component formula of table 1 implements.

Table 1: three embodiment component prescription quality parts

Material name

Example 1

Example 2

Example 3

Deionized water	16.5	15	22
				Propylene glycol	3	3	5
Sterilant	0.2	0.2	0.2
				Wetting agent	0.3	0.2	0.3
Dispersion agent	1.5	1.2	1.0
				Rutile titanium white powder	5	--	--
Anatase thpe white powder	--	6	8
				Water-ground limestone	10	8	--
Kaolin	12	10	15
				Talcum powder	2	2	2
The tertiary acrylic emulsion of self-crosslinking	45	48	42
				Film coalescence aid	3	4	3
PH conditioning agent	0.5	0.6	0.5
				Thickening material	1.0	1.5	0.8
Defoamer	0.3	0.3	0.2

Embodiment 1:

Join successively in order in stirred pot than water, defoamer, dispersion agent, wetting agent and sterilant by formulation weight according to example in table 11, after being uniformly dispersed, low speed adds titanium dioxide, water-ground limestone, kaolin, talcum powder, then high speed dispersion 15min～30min, after the fineness of slurry is qualified, under middling speed state, add tertiary acrylic emulsion, then at the uniform velocity add film coalescence aid, the good viscosity of stirring and adjusting and pH value, make a kind of all-round alkali-resistant sealing primer.

Embodiment 2, embodiment 3 preparation processes are with reference to embodiment 1.

According to relevant national standard, fundamental property that all can alkali-resistant sealing primer of the present invention is detected, test result is as shown in table 2.

The all-round alkali-resistant sealing primer fundamental property test result of table 2

Test event	Test result
		At condition in container	Without lump, uniform state
Application property	Brush accessible
		Low-temperature stability	Pass through
Paint film appearance	Normally
		Water tolerance 96h	Without abnormal
Alkali resistance 48h	Without abnormal
		Sticking power	1 grade
Water-permeable	≤ 0.2 passes through
		Alkali-resistivity 72h	Without abnormal
Salting-out resistance 144h	Without abnormal

Although the present invention has been explained in detail and has quoted as proof embodiment, for those of ordinary skill in the art, various schemes, amendment and the change that obviously can make according to above-mentioned explanation, within all should being included in the scope of claim.

Claims

1. an all-round alkali-resistant sealing primer, it is characterized in that: by weight percentage, comprise following component: emulsion 30%～60%, titanium dioxide 5%～10%, water-ground limestone 5%～15%, kaolin 5%～15%, talcum powder 1%～3%, film coalescence aid 2%～6%, propylene glycol 1%～5%, thickener rheology agent 0.5%～3%, auxiliary agent 2%～5%, deionized water 10%～25%.

2. the all-round alkali-resistant sealing primer of one as claimed in claim 1, is characterized in that: said emulsion is selected the tertiary acrylic emulsion of self-crosslinking alkali resistant.

3. the all-round alkali-resistant sealing primer of one as claimed in claim 1, is characterized in that: said titanium dioxide is selected one or more combination of rutile titanium white powder or anatase thpe white powder.

4. the all-round alkali-resistant sealing primer of one as claimed in claim 1, is characterized in that: said water-ground limestone is selected 1000 object powders.

5. the all-round alkali-resistant sealing primer of one as claimed in claim 1, is characterized in that: said kaolin is selected 1000 object powders.

6. the all-round alkali-resistant sealing primer of one as claimed in claim 1, is characterized in that: said talcum powder is selected 1000 object powders.

7. the all-round alkali-resistant sealing primer of one as claimed in claim 1, is characterized in that: said film coalescence aid is selected one or more combination of glycol ether, diethylene glycol ether, propylene glycol and alcohol ester-12.

8. the all-round alkali-resistant sealing primer of one as claimed in claim 1, is characterized in that: said auxiliary agent at least comprises one or more combination of dispersion agent, wetting agent, defoamer, PH conditioning agent and sterilant.

9. the all-round alkali-resistant sealing primer of one as claimed in claim 1, is characterized in that: said thickener rheology agent is one or more combination of association type acrylate, hydrophobic association type polyurethane and Natvosol.

10. the preparation method of an a kind of all-round alkali-resistant sealing primer as claimed in claim 1, it is characterized in that: described preparation method comprises: compare deionized water by formulation weight, defoamer, dispersion agent, wetting agent and sterilant join in stirred pot in order successively, after being uniformly dispersed, low speed adds titanium dioxide, water-ground limestone, kaolin, talcum powder, then high speed dispersion 15min～30min, after the fineness of slurry is qualified, under middling speed state, add tertiary acrylic emulsion, then at the uniform velocity add film coalescence aid, the good viscosity of stirring and adjusting and pH value, make a kind of all-round alkali-resistant sealing primer.