Bi-component water-borne wood paint and preparation method thereof

Abstract

The invention relates to the field of coatings, and in particular, relates to bi-component water-borne wood paint and a preparation method thereof. The bi-component water-borne wood paint comprises the following components in parts by weight: a water-borne acrylic emulsion, a water-borne polyurethane emulsion, a modified defoaming agent, a wetting agent, a coalescing agent and deionized water, wherein the modified defoaming agent is formed by mixing a defoaming agent, organobentonite, an emulsifier and deionized water, and a preparation method of the modified defoaming agent comprises the steps: stirring and mixing the defoaming agent and the organobentonite, then adding deionized water accounting for 10-15% of the total mass of the deionized water in the modified defoaming agent, stirring and mixing, then adding the emulsifier, stirring and mixing, adding the rest deionized water in the modified defoaming agent, and stirring and mixing to obtain the modified defoaming agent. According to the bi-component water-borne wood paint, the modified defoaming agent has good compatibility with a mixed system and also has good defoaming capacity, so that a final paint film is flat and free of shrinkage cavities.

Description

technical field

[0001] The application relates to the field of coatings, more specifically, it relates to a two-component water-based wood varnish and a preparation method thereof. Background technique

[0002] Paint is also called paint. Paint is a continuous film that is coated on the surface of an object to be protected or decorated and can form a firm adhesion with the object to be coated. It is usually based on resin, or oil, or emulsion, adding or It is a viscous liquid prepared with organic solvents or water without adding pigments or fillers and adding corresponding additives. In household paints, paints can be divided into interior wall paints, exterior wall paints, wood paints, metal paints, and floor paints.

[0003] Among them, wood paint refers to a type of resin paint used on wood products. It can be divided into water-based paint and oil-based paint according to the type of solvent, and can be divided into high-gloss, semi-matte and matte paint according to g...

Examples

preparation example 1

[0052] A modified defoamer, calculated according to the total weight of the modified defoamer as 1kg, the components and their corresponding weights are shown in Table 1, and are prepared through the following steps:

[0053] A1: Add 0.077kg of sodium dodecyl diphenyl ether sulfonate into the emulsification pot, raise the temperature to 50°C, and stir and mix for 20 minutes at a stirring speed of 600r / min to obtain an emulsifier mixture.

[0054] A2: Heat the emulsification pot to 60°C, add 0.192kg of defoamer BNK-G408 and 0.577kg of organic bentonite to the emulsification pot, stir and mix for 10min at a stirring speed of 600r / min; continue to add 0.0154kg of deionized water (accounting for 10% of the total weight of the total deionized water), after stirring and mixing for 2 minutes, add 0.077kg emulsifier mixed solution, and stir and mix for 20 minutes.

[0055] A3: Cool the emulsification pot to 40°C and reduce the stirring speed to 350r / min. Within 20 minutes, add the rem...

preparation example 2-5

[0060] A modified defoamer, the difference from Preparation Example 1 is that each component and its corresponding weight are shown in Table 1.

[0061] Each component and its weight (kg) in table 1 preparation example 1-5

[0062]

preparation example 6

[0064] A modified defoamer, the difference from Preparation Example 3 is that except that the defoamer is composed of Surfynol AD01, BNK-G408, TEG0810 and BYK022 in a weight ratio of 1:0.5:0.5:1.0, the others are mixed with Preparation example 3 is the same.

technical field

[0001] The application relates to the field of coatings, more specifically, it relates to a two-component water-based wood varnish and a preparation method thereof. Background technique

[0002] Paint is also called paint. Paint is a continuous film that is coated on the surface of an object to be protected or decorated and can form a firm adhesion with the object to be coated. It is usually based on resin, or oil, or emulsion, adding or It is a viscous liquid prepared with organic solvents or water without adding pigments or fillers and adding corresponding additives. In household paints, paints can be divided into interior wall paints, exterior wall paints, wood paints, metal paints, and floor paints.

[0003] Among them, wood paint refers to a type of resin paint used on wood products. It can be divided into water-based paint and oil-based paint according to the type of solvent, and can be divided into high-gloss, semi-matte and matte paint according to g...

Examples

preparation example 1

[0052] A modified defoamer, calculated according to the total weight of the modified defoamer as 1kg, the components and their corresponding weights are shown in Table 1, and are prepared through the following steps:

[0053] A1: Add 0.077kg of sodium dodecyl diphenyl ether sulfonate into the emulsification pot, raise the temperature to 50°C, and stir and mix for 20 minutes at a stirring speed of 600r / min to obtain an emulsifier mixture.

[0054] A2: Heat the emulsification pot to 60°C, add 0.192kg of defoamer BNK-G408 and 0.577kg of organic bentonite to the emulsification pot, stir and mix for 10min at a stirring speed of 600r / min; continue to add 0.0154kg of deionized water (accounting for 10% of the total weight of the total deionized water), after stirring and mixing for 2 minutes, add 0.077kg emulsifier mixed solution, and stir and mix for 20 minutes.

[0055] A3: Cool the emulsification pot to 40°C and reduce the stirring speed to 350r / min. Within 20 minutes, add the rem...

preparation example 2-5

[0060] A modified defoamer, the difference from Preparation Example 1 is that each component and its corresponding weight are shown in Table 1.

[0061] Each component and its weight (kg) in table 1 preparation example 1-5

[0062]

preparation example 6

[0064] A modified defoamer, the difference from Preparation Example 3 is that except that the defoamer is composed of Surfynol AD01, BNK-G408, TEG0810 and BYK022 in a weight ratio of 1:0.5:0.5:1.0, the others are mixed with Preparation example 3 is the same.

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