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High-salt-spray-resistance and high-weather-resistance two-component water-based primer-topcoat coating and preparation method thereof

A technology of salt spray resistance and weather resistance, applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problem that it is difficult to meet the engine corrosion resistance, salt spray resistance and weather resistance at the same time.

Pending Publication Date: 2022-07-29
山东七维新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the special requirements of engine coating, it is difficult for general bottom-surface-in-one coatings to meet good adhesion on different substrates at the same time, and it is also difficult to meet the corrosion resistance, salt spray resistance and weather resistance required by the engine at the same time.

Method used

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  • High-salt-spray-resistance and high-weather-resistance two-component water-based primer-topcoat coating and preparation method thereof
  • High-salt-spray-resistance and high-weather-resistance two-component water-based primer-topcoat coating and preparation method thereof
  • High-salt-spray-resistance and high-weather-resistance two-component water-based primer-topcoat coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A two-component water-based bottom surface-in-one paint with high salt spray resistance and high weather resistance, the paint is composed of component A and component B with a weight ratio of 9:1;

[0041]Component A includes: non-ionic water-based modified epoxy resin (epoxy equivalent 1200~1400g / mol, density 1.0~1.1g / mL, solid content 50~55wt%, viscosity 300~800cp) 45Kg, water-based acrylic emulsion ( Acrylic acid pH8.0~9.0, density 1.0~1.1g / mL, active substance content 50~55wt%, viscosity <500cp) 12Kg, coloring pigment carbon black 3Kg, filler barium sulfate 9Kg, anti-rust pigment mica powder 4Kg, zinc phosphate 2Kg, calcium aluminum polyphosphate 5Kg, ceramic powder 7Kg, dispersant TEGO760W 1.5Kg, defoamer TEGO 810 0.15Kg, wetting and leveling agent TEGO 4100 0.3Kg, film-forming aid alcohol ester 1.5Kg, anti-flash rust Auxiliary phosphate compound 0.9Kg, UV absorber triazine 0.5, liquid benzotriazole 1.0Kg, pure water 13Kg, rheology assistant polyurethane 0.4Kg, so...

Embodiment 5

[0048] According to the weight proportioning of embodiment 1, first prepare A component:

[0049] (1) Add the water-based modified epoxy resin, solvent and pure water into the grinding cylinder, start stirring, keep the rotating speed at 850r / min and stir for 15min, add dispersant, defoamer, coloring pigment, filler, antirust in turn Pigment and ceramic powder, keep rotating speed 1350r / min and disperse for 18min;

[0050] (2) grinding the dispersion slurry obtained in step (2), controlling the grinding temperature not to be higher than 40°C, and grinding to a fineness of 25-26 μm;

[0051] (3) adding the water-based acrylic emulsion into another grinding cylinder, keeping the stirring speed at 850 r / min, adding the film-forming aid, the wetting and leveling agent, the grinding slurry obtained in step (2), the anti-flash rust aid in turn agent, ultraviolet absorber and rheological aid, and stir for 25 minutes to obtain the A component;

[0052] Next prepare component B:

[...

Embodiment 6

[0056] According to the weight proportioning of embodiment 2, first prepare A component:

[0057] (1) Add the water-based modified epoxy resin, solvent and pure water into the grinding cylinder, start stirring, keep the rotating speed at 900r / min and stir for 15min, and add dispersant, defoamer, coloring pigment, filler, antirust in turn Pigment and ceramic powder, keep rotating speed 1400r / min and disperse for 16min;

[0058] (2) grinding the dispersion slurry obtained in step (2), controlling the grinding temperature not to be higher than 40°C, and grinding to a fineness of 26-27 μm;

[0059] (3) adding the water-based acrylic emulsion into another grinding cylinder, keeping the stirring speed at 900 r / min, adding the film-forming aid, the wetting and leveling agent, the grinding slurry obtained in step (2), the anti-flash rust aid in turn agent, ultraviolet absorber and rheological aid, and stir for 20 minutes to obtain the A component;

[0060] Next prepare component B: ...

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Abstract

The invention discloses a two-component water-based primer-topcoat coating with high salt mist resistance and high weather resistance and a preparation method of the two-component water-based primer-topcoat coating. The coating consists of a component A and a component B, the component A is prepared from 30 to 60 parts of water-based modified epoxy resin, 10 to 20 parts of water-based acrylic emulsion, 2 to 10 parts of coloring pigment, 8 to 15 parts of filler, 10 to 20 parts of anti-rust pigment, 5 to 10 parts of ceramic powder, 1 to 2 parts of dispersing agent, 0.1 to 0.5 part of defoaming agent, 0.2 to 0.5 part of wetting flatting agent, 1 to 4 parts of coalescing agent, 0.5 to 2 parts of anti-flash-rust additive, 1 to 2 parts of ultraviolet light absorber, 10 to 20 parts of pure water, 0 to 1 part of rheological additive and 5 to 10 parts of solvent; and the component B comprises the following components in parts by weight: 50-80 parts of an epoxy curing agent, 20-40 parts of a cosolvent and 5-10 parts of an adhesion promoter. According to the invention, a single coating has good adhesive force, higher salt spray resistance and higher weather resistance to a complex substrate at the same time.

Description

technical field [0001] The invention relates to a two-component bottom-in-one coating, in particular to a bottom-in-one coating with high salt spray resistance and high weather resistance that can be used in engines. Background technique [0002] Water-based coatings use water as a diluent, which greatly reduces the emissions of formaldehyde, toluene, xylene, etc., and reduces the pollution to the atmospheric environment while protecting personal life and property safety. Therefore, as people pay more and more attention to the environment and health, water-based coatings have become more and more widely used as an alternative to traditional solvent-based coatings. [0003] When the engine is painted, the substrate is more complex, including cast iron, cast aluminum, electrophoresis, plastic, rubber and stainless steel and other coating substrates. It is difficult for general coatings to meet the adhesion on different substrates at the same time. Traditional engine painting ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D133/00C09D5/08C09D7/61
CPCC09D163/00C09D5/084C09D7/61C08K2003/328C08K2003/327C08L33/00C08K3/013C08K3/32C08K3/34
Inventor 岳子林杨勇彭延泉
Owner 山东七维新材料有限公司
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