High-weather-resistance coiled material coating composition and application thereof

A coil coating and weather resistance technology, used in polyester coatings, antifouling/underwater coatings, coatings, etc., can solve problems such as insufficient corrosion resistance, inability to apply high corrosion resistance environments, etc., and achieve interlayer adhesion. Strong, excellent MEK wiping effect, excellent weather resistance effect

Pending Publication Date: 2022-05-03
NIPPON PAINT IND COATINGS SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Patent CN105462460B discloses a water-based coating for anti-fouling and anti-fingerprint stainless steel plates and its preparation method, which mainly includes modified water-based polyester resin and silica sol, but its corrosion resistance is less than 360h, so it cannot be applied in outdoor high corrosion resistance environments

Method used

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  • High-weather-resistance coiled material coating composition and application thereof
  • High-weather-resistance coiled material coating composition and application thereof
  • High-weather-resistance coiled material coating composition and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Prepare the high weather resistance coil coating composition of the present invention according to the formula of following table 1:

[0074] Table 1 Example 1 High weather resistance coil coating composition composition

[0075] components name Dosage (wt%) polyester resin NP 5055 65％ amino resin Cymel 303 6％ Hardener DESMODUR BL3175A 4％ catalyst AAC2500 1.0％ adhesion promoter SN7063 1.5％ Defoamer L-T 0.5％ leveling agent L-C 1％ solvent S-100 4％ solvent Propylene glycol methyl ether acetate 10％ solvent DBE 6％

[0076] Add saturated polyester resin, amino resin, and curing agent to the container in turn, mix and stir evenly, then add catalyst, adhesion promoter, leveling agent and defoamer under stirring, stir evenly, and finally add solvent, adjust the gloss as needed , viscosity, adjust the viscosity of the mixture to be 100-140 seconds, measure it with a coating-4 cup, filt...

Embodiment 2

[0079] Prepare the high weather resistance coil coating composition of the present invention according to the formula of following table 2:

[0080] Table 2 Example 2 Composition of high weather resistance coil coating composition

[0081] components name Dosage (wt%) polyester resin NP 5055 54％ amino resin Cymel 325 4％ Hardener DESMODUR BL3175A 4％ catalyst Nacure 1051 0.4％ adhesion promoter SN7063 1.5％ Defoamer L-T 0.5％ leveling agent L-C 1％ solvent S-100 4％ solvent Propylene glycol methyl ether acetate 10％ solvent DBE 6％

[0082] Add saturated polyester resin, amino resin, and curing agent to the container in turn, mix and stir evenly, then add acid catalyst, adhesion promoter, leveling agent and defoamer under stirring, stir evenly, and finally add solvent, adjust as needed Gloss, viscosity, adjust the viscosity of the mixture to be 100-140 seconds, measure with Tu-4 cup, filter ...

Embodiment 3

[0085] Prepare the high weather resistance coil coating composition of the present invention according to the formula of following table 3:

[0086] Table 3 Example 3 Composition of high weather resistance coil coating composition

[0087] components name Dosage (wt%) polyester resin NP 5055 60％ amino resin Cymel 688 4％ Hardener DESMODUR BL3175A 6％ catalyst Nacure 1051 0.6％ adhesion promoter SN-7063 1.5％ Defoamer L-T 0.5％ leveling agent L-C 1％ solvent S-100 4％ solvent Propylene glycol methyl ether acetate 10％ solvent DBE 6％

[0088] Add saturated polyester resin, amino resin, and curing agent to the container in turn, mix and stir evenly, then add acid catalyst, adhesion promoter, leveling agent and defoamer under stirring, stir evenly, and finally add solvent, adjust as needed Gloss, viscosity, adjust the viscosity of the mixture to be 100-140 seconds, measure with Tu-4 cup, filter...

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Abstract

The invention provides a high-weather-resistance coiled material coating composition, which comprises the following components in percentage by mass: 30-80% of polyester resin, 10-20% of a curing agent, 1-10% of a curing agent, 1-10% of a curing agent, 1-10% of a curing agent and 1-10% of a curing agent. 2-15% of amino resin; 4-10% of a curing agent; 1-3% of an adhesion promoter; 1-5% of an auxiliary agent; and the balance of a solvent, wherein the polyester resin is saturated polyester resin, the number-average molecular weight Mn of the polyester resin is 3000-20000, the hydroxyl value of the polyester resin is 30-70 mg KOH/g, the acid value of the polyester resin does not exceed 10 mg KOH/g, and a molecular chain of the polyester resin contains a neopentyl structure. The high-weather-resistance coiled material coating composition does not need pretreatment, can be directly coated on a metal substrate such as stainless steel and the like, and has excellent machinability and adhesive force, meanwhile, a cured paint film has excellent weather resistance, pollution resistance, MEK resistance, corrosion resistance and wear resistance, and the high-weather-resistance coiled material coating composition is mainly applied to external coating of metal coiled materials such as stainless steel and the like.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a weather-resistant coating for stainless steel plates, a preparation method and application. Background technique [0002] Due to its unique specular brightness, high wear resistance, excellent corrosion resistance and other excellent characteristics, stainless steel is widely used in life medical treatment, home appliance decoration and landscape decoration industries, giving people a gorgeous and noble feeling. [0003] With the improvement of people's demand for high-grade materials and diversified decoration, the application and development prospects of stainless steel plates are becoming wider and wider. However, the application and development of stainless steel largely depends on its surface treatment technology, which requires its surface to have excellent antifouling, protection, glazing and antifouling effects, and the daily cleaning and maintenance of use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/00C09D161/20C09D5/16B05D7/24B05D7/14
CPCC09D167/00C09D5/16B05D7/24B05D7/14B05D2202/15C08L2201/08C08L61/20
Inventor 李玉玲林宏
Owner NIPPON PAINT IND COATINGS SHANGHAI
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