CN101117483A - Water-based fluorocarbon paint and preparation method thereof - Google Patents

Abstract

The invention discloses a water-based fluorocarbon paint which comprises the following substances: 0.1 to 0.3 percent of cellulose; 0.3 to 0.6 percent of dispersant; 0.1 to 0.5 percent of wetting agent; 0.1 to 0.3 percent of multifunctional additive; 0.1 to 0.3 percent of defoaming agent; 0.1 to 0.2 percent of preservative; 0.2 to 0.6 percent of mildew preventive; 1.0 to 4.0 percent of antifreeze; 1.0-3.0% of film-forming additive; 0.3 to 0.6 percent of flatting agent; PU thickener 0.3-0.6%; 16-25% of rutile titanium dioxide; 35-50% of water-based fluorocarbon emulsion; the balance of solvent deionized water, and the percentage is weight percentage. The invention has the advantages of environmental protection, higher weather resistance, stronger stain resistance and aging resistance, and the like.

Description

Waterborne fluorocarbon paint and preparation method thereof

technical field

The invention relates to coatings, in particular to a water-based fluorocarbon paint for exterior walls and a preparation method thereof.

Background technique

Wall decoration materials can decorate and protect buildings, improve the durability of buildings and prolong their service life. Due to the rapid development of the construction industry and the improvement of people's living standards, modern decorative materials in my country have also developed rapidly. At present, the materials used for exterior wall decoration at home and abroad mainly include decorative stone, glass curtain wall, exterior wall facing brick, various decorative panels, architectural coatings, etc. According to the characteristics and development trends of exterior wall decoration materials at home and abroad, my country's foreign Environmentally friendly high-performance exterior wall coatings should be the main development direction for wall decoration materials. Among high-performance exterior wall coatings, fluorocarbon paints should be the first choice. Fluorocarbon paint has attracted the attention and favor of the decoration industry for its unique weather resistance, stain resistance, solvent resistance, acid and alkali resistance, and hydrophobic properties. The current fluorocarbon paint is mainly solvent-based, and because the solvent-based fluorocarbon paint contains high VOC, the solvent is directly volatilized in the air during construction and cannot be recycled, resulting in waste of resources, polluting the environment, and has certain harm to the construction workers. Poisonous, construction tools are difficult to clean. In addition, the paint film of solvent-based fluorocarbon paint is dense, has poor air permeability, and is easy to form local bubbles. On the other hand, the weather resistance, stain resistance and aging resistance of latex paints in the prior art cannot meet the needs of use.

Contents of the invention

The object of the present invention is to overcome the above-mentioned defects in the prior art, and provide an environmentally friendly water-based fluorocarbon paint with higher weather resistance, stain resistance and aging resistance.

Waterborne fluorocarbon paint of the present invention comprises following material:

Cellulose 0.1-0.3%

Dispersant 0.3-0.6%

Wetting agent 0.1-0.5%

Multifunctional additives 0.1-0.3%

Defoamer 0.1-0.3%

Preservatives 0.1-0.2%

Antifungal agent 0.2-0.6%

Antifreeze 1.0-4.0%

Coalescing aids 1.0-3.0%

Leveling agent 0.3-0.6%

PU thickener 0.3-0.6%

Rutile titanium dioxide 16-25%

Water-based fluorocarbon emulsion 35-50%

The rest is solvent deionized water, and the stated percentages are percentages by weight.

The cellulose is 250HBR from Aqualon.

The dispersant is 716W from Germany Degussa Company.

The wetting agent is Triton X-405 from Dow Chemical.

Described multifunctional additive is AMP-95 of U.S. Dow.

The defoamer is BYK-028 from German BYK Chemical Company, or NopcoNXZ from German Corning Company.

The preservative is Kathon LXE.

The antifreezing agent is composed of 1,2-propanediol.

The leveling agent is RM2020 and RM-8W of Rohm and Haas, or NHS300 and NLS200, or other polyurethane thickeners.

The preparation method of waterborne fluorocarbon paint comprises the following steps:

(a), part of deionized water, cellulose, dispersant, wetting agent, multifunctional additive, half defoamer, preservative, antifungal agent, antifreeze, film-forming aid, leveling agent, PU Add the thickener to the container and stir for 10 minutes;

(b), then add rutile titanium dioxide, wash the inner wall of the container with some deionized water, and then disperse at high speed for 20-30 minutes until the fineness is qualified;

(c) Add water-based fluorocarbon emulsion under low-speed stirring, stir evenly, then add an appropriate amount of deionized water and the remaining half of the defoamer, and continue stirring for about 20 minutes to complete.

The present invention has the following advantages:

1. Super strong scrub resistance, strong waterproof and self-cleaning function;

2. Super anti-aging, anti-ultraviolet, weather resistance, keep the wall lasting as new;

3. Rich colors, healthy and environmentally friendly, not easy to change color;

4. Super strong stain resistance, acid and alkali resistance, corrosion resistance, temperature change resistance and chemical resistance.

5. Excellent adhesion, good ventilation function, comprehensive protection of the wall;

6. It has anti-mildew and anti-algae functions and prolongs the service life of the paint film;

7. The construction process is simple, and can be sprayed, rolled and brushed;

8. Easy to repeat painting and repairing;

9. High decoration, and excellent salt spray resistance and aging resistance;

10. The paint film has excellent mechanical properties, good stain resistance and easy cleaning.

Detailed ways

The preparation method of embodiment 1:

(a) In a one-liter container, mix part of deionized water, cellulose, dispersant, wetting agent, multifunctional additive, half of defoamer, preservative, antifungal agent, antifreeze, film-forming aid , leveling agent and PU thickener are added to the container and stirred for 10 minutes;

(b), then add rutile titanium dioxide, wash the inner wall of the container with some deionized water, and then disperse at high speed for 20-30 minutes until the fineness is qualified;

(c) Add water-based fluorocarbon emulsion under low-speed stirring, stir evenly, then add an appropriate amount of deionized water and the remaining half of the defoamer, and continue stirring for about 20 minutes to complete.

The preparation method of embodiment 2-4 is the same as embodiment 1.

Table 1 Example 1-4 raw material ratio wt/wt

raw material name Example 1 Example 2 Example 3 Example 4 Cellulose 0.1 0.2 0.2 0.2 Dispersant 0.3 0.4 0.5 0.5 D 0.1 0.1 0.2 0.2 Multifunctional additives 0.1 0.2 0.2 0.2 Defoamer 0.2 0.3 0.3 0.3 Preservatives 0.1 0.2 0.2 0.2 antifungal agent 0.2 0.3 0.4 0.4 Propylene Glycol 1.0 1.2 1.2 1.2 Coalescing aids 1.0 1.2 1.5 1.8 leveling agent 0.3 0.4 0.4 0.4 PU thickener 0.3 0.3 0.3 0.3 rutile titanium dioxide 16 20 twenty two 25 Deionized water Appropriate amount Appropriate amount Appropriate amount Appropriate amount Water-based fluorocarbon emulsion 35 40 45 50

Table 2 paint film performance test data

Test items Example 1 Example 2 Example 3 Example 4 Initial Viscosity 60° Glossy Color Paste Compatibility Water Resistance Alkali Resistance Coating Temperature Variable Brushing Workability Stain Resistance Storage Stability 100KU21% Floating color No abnormality No abnormality Good 15% Fair 103KU12% Floating color No abnormality No abnormality Good 12% Good 106KU17% no floating color no abnormality no abnormality good 10% good 106KU26% no floating color no abnormality no abnormality good 7% good

Waterborne fluorocarbon paint of the present invention submits inspection result of table 3

Test items Standard (premium product) Test results State in the container Workability Low temperature stability Drying time (surface dry) h ≤ Appearance contrast ratio of coating film (white or light color) Water resistance Alkali resistance Scrub resistance / times ≥ Artificial aging resistance Chalking / grade ≤ Discoloration / Grade ≤ Contamination resistance % coating temperature resistance (5 cycles) No hard lumps After stirring, it was in a uniform state Brushing two coats without obstacles and no deterioration 2 Normal 0.9396h No abnormality 48h No abnormality 2000600h No blistering, no peeling, no cracks 1215 No abnormality No hard lumps, uniform state after stirring, brushing two coats without obstacles and no deterioration ≤2 normal 0.9896h no abnormality 48h no abnormality>20001200h no blistering, no peeling, no cracks 129 no abnormality

Table 4 styrene-acrylic latex paint, pure acrylic latex paint, silicon-acrylic latex paint, solvent-based two-component fluorocarbon paint and water-based fluorocarbon paint performance comparison of the present invention

project Water-based fluorocarbon paint Solvent based fluorocarbon paint Silicone acrylic latex paint Pure acrylic latex paint Styrene Acrylic Latex Paint     ΔE UV resistance Gloss retention Stain resistance Water resistance Alkali resistance Coating resistance to temperature change 485% 7% no abnormality no abnormality no abnormality 3.590% 6% no exception no exception no exception 5.570% 15% no exception no exception no exception 6.570% 18% no exception no exception no exception 8.560% 16% no exception no exception no exception

As can be seen from the above tests, the water-based fluorocarbon paint of the present invention has excellent properties, and it has better weather resistance, stain resistance and aging resistance than general latex paints when applied to walls, while it is different from solvent-based fluorocarbon paints. Compared with carbon paint, while maintaining the paint film performance of solvent-based fluorocarbon paint, it also greatly reduces the VOC content. Therefore, the paint film performance and environmental protection performance of water-based fluorocarbon paint can fully meet the requirements of modern wall decoration.

Claims (10)

1. A water-based fluorocarbon paint, characterized in that it comprises the following substances: Cellulose 0.1-0.3% Dispersant 0.3-0.6% Wetting agent 0.2-0.5% Multifunctional additives 0.1-0.3% Defoamer 0.1-0.3% Preservatives 0.1-0.2% Antifungal agent 0.2-0.6% Antifreeze 1.0-4.0% Coalescing aids 1.0-3.0% Leveling agent 0.3-0.6% PU thickener 0.3-0.6% Rutile titanium dioxide 16-25% Water-based fluorocarbon emulsion 35-50% The rest is solvent deionized water, and the stated percentages are percentages by weight. 2. water-based fluorocarbon paint according to claim 1, is characterized in that, described cellulose is 250HBR of Aqualon company. 3. water-based fluorocarbon paint according to claim 1, is characterized in that, described dispersant is 716W of German Degussa company. 4. water-based fluorocarbon paint according to claim 1, is characterized in that, described wetting agent is the Triton X-405 of Dow Chemical. 5. water-based fluorocarbon paint according to claim 1, is characterized in that, described multifunctional additive is AMP-95 of U.S. Dow. 6. water-based fluorocarbon paint according to claim 1, is characterized in that, described defoamer is BYK-028 of German Byk Chemical Company or Nopco NXZ of German Corning Company. 7. water-based fluorocarbon paint according to claim 1, is characterized in that, described preservative is Kathon LXE. 8. The water-based fluorocarbon paint according to claim 1, characterized in that, the composition of the antifreeze is 1,2-propanediol. 9. The water-based fluorocarbon paint according to claim 1, wherein the leveling agent is RM2020 and RM-8W of Rohm and Haas, or NHS300 and NLS200, or other polyurethane thickeners. 10. The preparation method of water-based fluorocarbon paint according to claim 1, is characterized in that, comprises the following steps: (a), part of the deionized water, cellulose, dispersant, wetting agent, multifunctional additive, half defoamer, preservative, antifungal agent, antifreeze, film-forming aid, leveling agent, PU Add the thickener to the container and stir for 10 minutes; (b), then add rutile titanium dioxide, wash the inner wall of the container with some deionized water, and then disperse at high speed for 20-30 minutes until the fineness is qualified; (c), then add water-based fluorocarbon emulsion under low-speed stirring, stir evenly, then add an appropriate amount of deionized water and the remaining half of the defoamer, and continue stirring for about 20 minutes to complete.