CN104178014A - External wall coating and preparation method thereof - Google Patents

Abstract

The invention relates to an external wall coating and a preparation method thereof. The preparation method comprises the following steps: 1. pouring 250g of water in a flask and mixing with the rotation speed of 200-600 revolutions, slowly pouring 5g of PAC in the water, adjusting the rotation speed to 800 revolutions and mixing to dissolve PAC for 13-16 minutes; 2. adding 5.4g of dispersant and 0.5g of defoamer, increasing the rotation speed to 2000 revolutions, then adding 50g of kaoline, 50g of titanium pigment, 421g of heavy calcium carbonate and 14g of water and subsequently dispersing for 25-35 minutes; 3. adding 1g of AMP95, 10g of film-forming additive, 5g of propanediol, 1g of preservative and 1.5g of polyurethane emulsion after uniform dispersion, reducing the rotation speed to 800 revolutions, and dispersing for 10-20 minutes to achieve homogeneousness without particles; 4. adding 120g of polyurethane emulsion and 69g of water and dispersing for 30 minutes. The external wall coating produced according to the method has breakthrough in durability, coating film smoothness, fullness, workability and decoration.

Description

A kind of exterior coating and preparation method thereof

Technical field

The present invention relates to a kind of coating, relate in particular to a kind of exterior coating and preparation method thereof.

Background technology

Exterior coating, for brushing the outer wall face of building, so a most important index is exactly ultraviolet radiation resisting, requires to reach long-time irradiation nondiscoloration.Exterior coating has also required water repelling property, and requiring has from washing property.It is hard and smooth, dirty once rushing that paint film is wanted.It is energy because it also has a water resisting property that exterior coating can be used for interior wall brushing use; And interior wall coating does not possess anti-solarization function, so can not be interior wall coating when exterior coating use.

The traditional solvent based coating proportion of China declines gradually, and the tempo of water-borne coatings is also very fast, but the low-grade kind of polyvinyl alcohol still accounts for larger specific gravity.But how improving the quality of water-borne coatings and developing new kind is that to consolidate and develop water-borne coatings be important problem.

As a kind of ideal performance of coating; not only to protect and beautify base material; and giving the specific function that base material itself cannot have, some base-materials that use at present just do not possess makes coating obtain very surprising high performance, high value-added, advanced effect.

Summary of the invention

The object of the invention is in order to overcome deficiency of the prior art, thereby a kind of exterior coating and preparation method thereof is provided.

A kind of exterior coating, unit serving proportioning is as follows by weight for the component of raw material:

Water 333g;

PAC 5g；

Dispersion agent 5.4g;

Defoamer 2g;

Coarse whiting 421g;

Kaolin 50g;

Titanium dioxide 50g;

AMP95 1g；

Film coalescence aid 10g;

Propylene glycol 5g;

Sanitas 1g;

Polyaminoester emulsion 120g.

A preparation method for exterior coating, comprises the steps:

Step 1:

Measure 250g water and pour in beaker and stir, now rotating speed is that 200-600 turns, and takes 5gPAC and is slowly poured into water, and turns speed and turns to 800, is stirred to PAC and dissolves 13-16 minute;

Step 2:

Add 5.4g dispersion agent, 0.5g defoamer, is upgraded to 2000 by rotating speed and turns, then adds 50g kaolin, 50g titanium dioxide, and 421g coarse whiting, disperses 25-35 minute after 14g water;

Step 3:

After being uniformly dispersed, add 1g AMP95,10g film coalescence aid, 5g propylene glycol, 1g sanitas, 1.5g defoamer, and rotating speed is down to 800 turns, disperse 10-20 minute, reach even without particle;

Step 4:

Add 120g polyaminoester emulsion, 69g water, disperses 30 minutes again.

Adopt the beneficial effect of technique scheme to be:

Weather resistance of the present invention, paint film smoothness, fullness ratio, application property, the aspect such as ornamental have breakthrough; Should continue research for the water-based base-material of more ripe epoxy emulsion, aqueous polyurethane and there is high performance water-borne coatings, meet the particular requirement of part.

The present invention is owing to adopting polyaminoester emulsion, especially the fluororesin modified copolymer emulsion taking vinyl fluoride as main body, become that performance is good, class is high, price can be again the high-quality base-material that people accept, for development high-performance, high-grade coating lay the foundation.Aspect the research of aqueous polyurethane coating, should concentrate strength on development.Urethane is one of high-grade material of excellent property, makes its Water-borne modification, not only meets the requirement that reduces pollution, save energy, but also has kept the characteristic of urethane itself.

Embodiment

Below the present invention is described in further detail:

A kind of exterior coating, unit serving proportioning is as follows by weight for the component of raw material:

Water 333g;

PAC 5g；

Dispersion agent 5.4g;

Defoamer 2g;

Coarse whiting 421g;

Kaolin 50g;

Titanium dioxide 50g;

AMP95 1g；

Film coalescence aid 10g;

Propylene glycol 5g;

Sanitas 1g;

Vinyl acetate between to for plastic-acrylate copolymer emulsion 120g.

A preparation method for exterior coating, comprises the steps:

Step 1:

Measure 250g water and pour in beaker and stir, now rotating speed is that 200-600 turns, and takes 5gPAC and is slowly poured into water, and turns speed and turns to 800, is stirred to PAC and dissolves 13-16 minute;

Step 2:

Add 5.4g dispersion agent, 0.5g defoamer, is upgraded to 2000 by rotating speed and turns, then adds 50g kaolin, 50g titanium dioxide, and 421g coarse whiting, disperses 25-35 minute after 14g water;

Step 3:

After being uniformly dispersed, add 1g AMP95,10g film coalescence aid, 5g propylene glycol, 1g sanitas, 1.5g defoamer, and rotating speed is down to 800 turns, disperse 10-20 minute, reach even without particle;

Step 4:

Add 120g vinyl acetate between to for plastic-acrylate copolymer emulsion, 69g water, disperses 30 minutes again.

AMP95 of the present invention is a kind of multifunctional assistant, appearance colorless transparent liquid moisture≤0.5%, massfraction >=95.0 of AMP95.Chemical name is 2-amino-2-methyl-1-propanol, and knot one structure formula is (CH3) 3C (NH2) CHBOH.Molecular weight 89.14.Colourless transparent liquid, relative density 0.942.Zero pour-2 DEG C.Viscosity (25-C) 147mPa.s, flash-point (closed-cup) 83-C.PH value (the 0.9%AMP-95 aqueous solution) 11.3.Effective constituent 95%.Flammable.Nontoxic.For regulating the pH value of emulsion sizing agent very stable, the effect of moistening, dispersion in addition.

Claims (2)

1. an exterior coating, is characterized in that: unit serving proportioning is as follows by weight for the component of raw material:

Water 333g;

PAC 5g；

Dispersion agent 5.4g;

Defoamer 2g;

Coarse whiting 421g;

Kaolin 50g;

Titanium dioxide 50g;

AMP95 1g；

Film coalescence aid 10g;

Propylene glycol 5g;

Sanitas 1g;

Polyaminoester emulsion 120g.

2. a preparation method for exterior coating, is characterized in that: it comprises the steps:

Step 1:

Measure 250g water and pour in beaker and stir, now rotating speed is that 200-600 turns, and takes 5gPAC and is slowly poured into water, and turns speed and turns to 800, is stirred to PAC and dissolves 13-16 minute;

Step 2:

Add 5.4g dispersion agent, 0.5g defoamer, is upgraded to 2000 by rotating speed and turns, then adds 50g kaolin, 50g titanium dioxide, and 421g coarse whiting, disperses 25-35 minute after 14g water;

Step 3:

After being uniformly dispersed, add 1g AMP95,10g film coalescence aid, 5g propylene glycol, 1g sanitas, 1.5g defoamer, and rotating speed is down to 800 turns, disperse 10-20 minute, reach even without particle;

Step 4:

Add 120g polyaminoester emulsion, 69g water, disperses 30 minutes again.