CN104212328A - Water-based thermal insulation topcoat - Google Patents

Abstract

The invention discloses a water-based heat-insulating finish paint which is prepared from 30-40% of water-based polyurethane emulsion, 22-28% of glass beads, 20-25% of deionized water, 8-12% of filler, 5-7% of auxiliary agent, 0.2-0.5% of defoaming agent, 0.1-0.5% of preservative and 0.5-0.9% of thickening agent. The finish paint has good heat insulation performance.

Description

Water-based thermal insulation topcoat

technical field

The invention relates to a water-based heat-insulating finish paint.

Background technique

In various fields, coatings are widely used, such as exterior walls, industrial warehouses, chemical, petroleum, food industry storage tanks and pipeline surfaces, factories, modern farms, freezers, private houses, office buildings and other buildings, etc. .

Traditionally, the coatings are made of organic solvents, which are highly polluting. Therefore, water-based coatings have been used on a large scale. For exterior wall coatings, one of the important technical problems that needs to be solved is heat insulation, but now Some water-based coatings have poor thermal insulation performance.

Contents of the invention

The purpose of the present invention is to provide a water-based heat-insulating finish paint with good heat-insulating performance.

In order to achieve the above purpose, the water-based heat-insulating topcoat consists of the following raw materials in terms of weight percentage:

Water-based polyurethane emulsion 30%-40%

Glass beads 22%-28%

Deionized water 20%-25%

Filler 8%-12%

Auxiliary 5%-7%

Defoamer 0.2%-0.5%

Preservatives 0.1%-0.5%

Thickener 0.5%-0.9% .

Further, the weight percent of each raw material is:

Water-based polyurethane emulsion 35%

Glass beads 25%

Deionized water 22.6%

Filler 10%

Auxiliary 6%

Defoamer 0.4%

Preservatives 0.3%

Thickener 0.7% .

Further, the filler is one of talcum powder, heavy calcium powder, kaolin, and precipitated barium sulfate.

Further, the auxiliary agent is a film-forming auxiliary agent, and the film-forming auxiliary agent is an alcohol ether solvent or an alcohol ester solvent.

Further, the defoamer is polysiloxane-polyether copolymer, the preservative is nitrite, and the thickener is one or two of associative polyurethane thickeners.

The beneficial effects of the present invention are: since the present invention adopts glass microspheres as basic raw materials, the glass microspheres have good reflective performance, thereby improving heat insulation performance, and the water-based polyurethane emulsion, filler and glass microspheres all have heat insulation effects. Therefore, the thermal insulation performance of the top coat is good.

Detailed ways

The present invention will be further described in detail below in conjunction with specific embodiments.

In terms of weight percentage, the water-based heat insulating finish paint of the present invention consists of 30%-40% water-based polyurethane emulsion, 22%-28% glass beads, 20%-25% deionized water, 8%-12% filler, 5% -7% additives, 0.2%-0.5% defoamer, 0.1%-0.5% preservative, 0.5%-0.9% thickener. The filler is one of talcum powder, heavy calcium powder, kaolin, and precipitated barium sulfate. The auxiliary agent is a film-forming auxiliary agent, and the film-forming auxiliary agent is an alcohol ether solvent or an alcohol ester solvent. The defoamer is polysiloxane-polyether copolymer, the antiseptic is nitrite, and the thickener is one or two of associative polyurethane thickeners.

Example 1.

(1) Weigh 250g of glass beads, 226g of deionized water, 100g of filler and 60g of additives and stir evenly at a temperature of 70-80°C at a speed of 400-800r/min.

(2) Weigh 350g of water-based polyurethane emulsion and add it to step (1), and react for 20-40min while stirring in a water bath at 80-100°C.

(3) Weigh 4g of defoamer, 3g of preservative, and 7g of thickener and add them to step (2), and stir for 5 to 10 minutes at a speed of 400 to 800r/min; filter to obtain a water-based heat-insulating finish .

Example 2.

(1) Weigh 238g of glass microspheres, 250g of deionized water, 120g of filler and 70g of additives and stir evenly at a temperature of 70-80°C at a speed of 400-800r/min.

(2) Weigh 300g of water-based polyurethane emulsion and add it to step (1), and react for 20-40min while stirring in a water bath at 80-100°C.

(3) Weigh 5g of defoamer, 8g of preservative, and 9g of thickener and add them to step (2), and stir for 5 to 10 minutes at a speed of 400 to 800r/min; filter to obtain a water-based heat-insulating finish .

Example 3.

(1) Weigh 220g of glass microspheres, 242g of deionized water, 80g of filler and 50g of additives and stir evenly at a temperature of 70-80°C at a speed of 400-800r/min.

(2) Weigh 400g of water-based polyurethane emulsion and add it to step (1), and react for 20-40min while stirring in a water bath at 80-100°C.

(3) Weigh 2g of defoamer, 1g of preservative, and 5g of thickener and add them to step (2), and stir for 5-10 minutes at a speed of 400-800r/min; filter to obtain a water-based heat-insulating finish .

Example 4.

(1) Weigh 280g of glass beads, 200g of deionized water, 100g of filler and 60g of additives and stir evenly at a temperature of 70-80°C at a speed of 400-800r/min.

(2) Weigh 347g of water-based polyurethane emulsion and add it to step (1), and react for 20-40min while stirring in a water bath at 80-100°C.

(3) Weigh 3g of defoamer, 4g of preservative, and 5g of thickener and add them to step (2), and stir for 5 to 10 minutes at a speed of 400 to 800r/min; filter to obtain a water-based heat-insulating finish .

Since the present invention adopts glass microspheres as basic raw materials, the glass microspheres have good reflective performance, thereby improving the heat insulation performance, and the water-based polyurethane emulsion, the filler and the glass microspheres all have heat insulation effects. Therefore, the thermal insulation performance of the top coat is good.

Claims (5)

1. water-borne heat-insulating finish paint, is characterized in that, according to weight percent meter, following raw material, consists of:

Aqueous polyurethane emulsion 30%-40%

Glass microballon 22%-28%

Deionized water 20%-25%

Filler 8%-12%

Auxiliary agent 5%-7%

Defoamer 0.2%-0.5%

Sanitas 0.1%-0.5%

Thickening material 0.5%-0.9%.

2. water-borne heat-insulating finish paint according to claim 1, is characterized in that: the weight percent of each raw material is:

Aqueous polyurethane emulsion 35%

Glass microballon 25%

Deionized water 22.6%

Filler 10%

Auxiliary agent 6%

Defoamer 0.4%

Sanitas 0.3%

Thickening material 0.7%.

3. water-borne heat-insulating finish paint according to claim 1, is characterized in that: filler is a kind of in talcum powder, dicalcium powder, kaolin, process white.

4. water-borne heat-insulating finish paint according to claim 1, is characterized in that: described auxiliary agent is film coalescence aid, and described film coalescence aid is alcohol ether solvent or the cruel kind solvent of alcohol.

5. water-borne heat-insulating finish paint according to claim 1, is characterized in that: described defoamer is polysiloxane-polyether copolymer, and described sanitas is nitrite, and described thickening material is one or both in association type polyurethane thickener.