Water-based naon-sized pre-coated coil top coating and preparation method thereof

A coil coating, water-based technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor protection and decoration effect, poor film compactness, large particle size of polymer emulsion, etc. Healthy, harmless, good penetrating effect

Inactive Publication Date: 2012-06-20
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pre-coated coil coatings reported in the above-mentioned patents, regardless of whether they are oil-based or water-based systems, all use traditional emulsion systems. The particle size of the polymer emulsion is large, the compactness of the paint film is poor, and the protective and decorative effects are relatively poor.

Method used

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  • Water-based naon-sized pre-coated coil top coating and preparation method thereof
  • Water-based naon-sized pre-coated coil top coating and preparation method thereof
  • Water-based naon-sized pre-coated coil top coating and preparation method thereof

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Embodiment Construction

[0032] The present invention passes through numerous tests, and the four specific examples screened out are listed in Table 1, but the present invention is not limited to the following examples. In Table 1: the emulsion is an aqueous acrylic polyurethane nanopolymer emulsion with a particle size of less than 100 nm.

[0033] Table 1: Component composition embodiment 1-4 of the present invention

[0034]

[0035]

[0036] By systematic research and experiments on the proportions of each component and the order of addition in the water-based nanometer pre-coated coil paint topcoat formula in the present invention, the best performance examples are as follows:

[0037] Weigh 54% of nanopolymer emulsion, 0.25% of wetting agent, 0.4% of dispersant, 0.02% of defoamer, 0.25% of pH regulator, 0.15% of preservative, 0.15% of antifungal agent and Add 13.38% deionized water into the paint mixing tank, and disperse for 10 minutes at the speed of the disperser at 800 rpm. Then add ...

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Abstract

The invention discloses a water-based naon-sized pre-coated coil top coating and a preparation method of the water-based naon-sized pre-coated coil top coating, and belongs to the technical field of coating production. The coating contains the following ingredients in percentage by weight: 40 to 70% of a nano-polymer emulsion, 1 to 30% of pigments, 5 to 20% of inert anti-rust pigments, 0.1 to 2% of active anti-rust pigments, 5 to 20% of fillers, 0.2 to 8% of adjuvants, 0.1 to 0.5% of pH regulators and the balance of deionized water. The coating system is composed of water-dispersible nano-polymer emulsion having a particle size of less than 100 nm, deionized water, pigments, inert anti-rust pigments, active anti-rust pigments, fillers and adjuvants. The water-based nano-polymer emulsion is composed of a hydrophilic acrylate copolymer, hydrophobic polyurethane and deionized water. The novel water-based naon-sized pre-coated coil top coating has the advantages that the film coatings are dense, have high thermodynamic property and mechanical stability and is good in corrosion resistance and weather resistance, and can meet the performance requirements of coating and coating process for pre-coated coils.

Description

technical field [0001] The invention belongs to the technical field of paint production, and in particular relates to a water-based nanometer pre-coated coil paint finish and a preparation method thereof. Background technique [0002] Pre-coated coil coating is a type of coating that has developed rapidly in recent years. It can be pre-coated on the surface of various coils such as cold-rolled steel sheets, galvanized steel sheets, and aluminum profiles. The coated coil is called color steel plate. Due to the characteristics of light weight, high performance and low price, color steel plate can be directly processed and formed into various products or parts without painting, which greatly improves the quality of products. It simplifies the manufacturing process of sheet metal products, so it has been widely used in many fields such as automobiles, ships, home appliances, building materials, etc. [0003] In order to meet the stringent environmental protection requirements a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D7/12
Inventor 陈广义张万喜魏志勇刘承洋
Owner DALIAN UNIV OF TECH
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