A kind of PU anti-cracking white primer and its manufacturing process

Abstract

The invention discloses an anti-cracking PU white undercoat and a preparation process thereof. The preparation process comprises the steps of sequentially adding modified synthetic resin fat, organic bentonite slurry, a modified adhesive force aid and a defoaming agent into a dispersing cylinder, regulating the rotation speed to be 1000r / min, dispersing for 5-8 minutes until the mixture is uniformly dispersed, adding rutile titanium dioxide, regulating the rotation speed to be 1500r / min, dispersing for 15-20 minutes, then maintaining the rotation speed constant, sequentially adding zinc stearate, special coat preparing powder and talcum powder, dispersing for 10 minutes, regulating the rotation speed to be 1000r / min, sequentially adding a flatting agent, butanol acetate and a delaying agent, and dispersing for 5 minutes, so as to obtain the anti-cracking PU white undercoat. The anti-cracking PU white undercoat has excellent anti-cracking performance, is capable of adapting hostile, cold, hot, dry and wet environments, does not contain substances including benzene, methylbenzene and xylene and is environmentally friendly.

Description

technical field

[0001] The invention relates to the field of preparation of an anti-cracking white primer, in particular to a PU anti-cracking white primer and a manufacturing process thereof. Background technique

[0002] Polyurethane (PU) coatings are currently a more common type of coating, which can be divided into two-component polyurethane coatings and one-component polyurethane coatings. Two-component polyurethane topcoat paint is generally composed of isocyanate prepolymers (also known as low molecular carbamate ester polymers) and hydroxyl resins, commonly known as curing agent components and main agent components. There are many varieties of this type of coating, and the application range is also very wide. According to the difference of the hydroxyl group-containing components, it can be divided into acrylic polyurethane, alkyd polyurethane, polyester polyurethane, polyether polyurethane, epoxy polyurethane and other varieties. Generally, they have good mechanica...

Examples

Embodiment 1

[0019] Add 35 parts of modified synthetic fat resin, 7 parts of organic bentonite slurry, 1 part of modified adhesion aid, and 0.1 part of defoamer into the dispersion tank in turn, adjust the speed to 1000r / min, and disperse for 5min, wait for the above After the components are evenly dispersed, add 13 parts of rutile titanium dioxide, adjust the rotation speed to 1500r / min, disperse for 18 minutes, then keep the rotation speed constant, add 2.5 parts of zinc stearate, 35 parts of special paint powder, and the special Paint powder is a mixture of calcium carbonate and magnesium silicate, 5 parts of talcum powder, and disperse for 10 minutes. Finally, adjust the rotation speed to 1000r / min, and add 0.1 parts of leveling agent, 3.1 parts of sec-butyl ester, and 0.2 parts of time delay agent in turn. , the delay agent is a sodium compound, and disperse for 5 minutes.

Embodiment 2

[0021] Add 38 parts of modified synthetic fat resin, 7 parts of organic bentonite slurry, 2 parts of modified adhesion aid, and 0.1 part of defoamer into the dispersion tank in sequence, adjust the speed to 1000r / min, and disperse for 6 minutes, and wait for the above After the components are evenly dispersed, add 13 parts of rutile titanium dioxide, adjust the speed to 1500r / min, disperse for 20 minutes, then keep the speed constant, add 2.5 parts of zinc stearate, 30 parts of special paint powder, and the special Paint powder is a mixture of calcium carbonate and magnesium silicate, 5 parts of talcum powder, and disperse for 10 minutes. Finally, adjust the rotation speed to 1000r / min, and add 0.1 parts of leveling agent, 3.1 parts of sec-butyl ester, and 0.2 parts of time delay agent in turn. , the delay agent is a sodium compound, and disperse for 5 minutes.

Embodiment 3

[0023] Add 32 parts of modified synthetic fat resin, 7 parts of organic bentonite slurry, 1 part of modified adhesion aid, and 0.1 part of defoamer into the dispersion tank in sequence, adjust the speed to 1000r / min, and disperse for 8 minutes, and wait for the above After the components are evenly dispersed, add 13 parts of rutile titanium dioxide, adjust the rotation speed to 1500r / min, disperse for 15 minutes, then keep the rotation speed constant, add 2.5 parts of zinc stearate, 36 parts of special paint powder, and the special Paint powder is a mixture of calcium carbonate and magnesium silicate, 5 parts of talcum powder, and disperse for 10 minutes. Finally, adjust the rotation speed to 1000r / min, and add 0.1 parts of leveling agent, 3.1 parts of sec-butyl ester, and 0.2 parts of time delay agent in turn. , the delay agent is a sodium compound, and disperse for 5 minutes.

[0024] With the PU white primer sample that above-mentioned embodiment obtains, do relevant perfor...

technical field

[0001] The invention relates to the field of preparation of an anti-cracking white primer, in particular to a PU anti-cracking white primer and a manufacturing process thereof. Background technique

[0002] Polyurethane (PU) coatings are currently a more common type of coating, which can be divided into two-component polyurethane coatings and one-component polyurethane coatings. Two-component polyurethane topcoat paint is generally composed of isocyanate prepolymers (also known as low molecular carbamate ester polymers) and hydroxyl resins, commonly known as curing agent components and main agent components. There are many varieties of this type of coating, and the application range is also very wide. According to the difference of the hydroxyl group-containing components, it can be divided into acrylic polyurethane, alkyd polyurethane, polyester polyurethane, polyether polyurethane, epoxy polyurethane and other varieties. Generally, they have good mechanica...

Examples

Embodiment 1

[0019] Add 35 parts of modified synthetic fat resin, 7 parts of organic bentonite slurry, 1 part of modified adhesion aid, and 0.1 part of defoamer into the dispersion tank in turn, adjust the speed to 1000r / min, and disperse for 5min, wait for the above After the components are evenly dispersed, add 13 parts of rutile titanium dioxide, adjust the rotation speed to 1500r / min, disperse for 18 minutes, then keep the rotation speed constant, add 2.5 parts of zinc stearate, 35 parts of special paint powder, and the special Paint powder is a mixture of calcium carbonate and magnesium silicate, 5 parts of talcum powder, and disperse for 10 minutes. Finally, adjust the rotation speed to 1000r / min, and add 0.1 parts of leveling agent, 3.1 parts of sec-butyl ester, and 0.2 parts of time delay agent in turn. , the delay agent is a sodium compound, and disperse for 5 minutes.

Embodiment 2

[0021] Add 38 parts of modified synthetic fat resin, 7 parts of organic bentonite slurry, 2 parts of modified adhesion aid, and 0.1 part of defoamer into the dispersion tank in sequence, adjust the speed to 1000r / min, and disperse for 6 minutes, and wait for the above After the components are evenly dispersed, add 13 parts of rutile titanium dioxide, adjust the speed to 1500r / min, disperse for 20 minutes, then keep the speed constant, add 2.5 parts of zinc stearate, 30 parts of special paint powder, and the special Paint powder is a mixture of calcium carbonate and magnesium silicate, 5 parts of talcum powder, and disperse for 10 minutes. Finally, adjust the rotation speed to 1000r / min, and add 0.1 parts of leveling agent, 3.1 parts of sec-butyl ester, and 0.2 parts of time delay agent in turn. , the delay agent is a sodium compound, and disperse for 5 minutes.

Embodiment 3

[0023] Add 32 parts of modified synthetic fat resin, 7 parts of organic bentonite slurry, 1 part of modified adhesion aid, and 0.1 part of defoamer into the dispersion tank in sequence, adjust the speed to 1000r / min, and disperse for 8 minutes, and wait for the above After the components are evenly dispersed, add 13 parts of rutile titanium dioxide, adjust the rotation speed to 1500r / min, disperse for 15 minutes, then keep the rotation speed constant, add 2.5 parts of zinc stearate, 36 parts of special paint powder, and the special Paint powder is a mixture of calcium carbonate and magnesium silicate, 5 parts of talcum powder, and disperse for 10 minutes. Finally, adjust the rotation speed to 1000r / min, and add 0.1 parts of leveling agent, 3.1 parts of sec-butyl ester, and 0.2 parts of time delay agent in turn. , the delay agent is a sodium compound, and disperse for 5 minutes.

[0024] With the PU white primer sample that above-mentioned embodiment obtains, do relevant perfor...

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