Water-based paint applied in aluminum-plastic plates and color steel coiled material

A water-based paint and pigment technology, applied in the paint field, can solve the problems of increasing respiratory diseases, reproductive system diseases, failing to meet the process requirements, poor paint effect, etc., achieving excellent solvent resistance (xylene) and not affecting production Efficiency, the effect of good marketing value

Active Publication Date: 2014-02-26

天津梓明涂料制造有限公司

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AI-Extracted Technical Summary

Problems solved by technology

[0002] At present, the most common surface coating products for decorative aluminum-plastic panels on the market are acrylic amino baking varnish, polyester amino baking varnish, epoxy baking varnish, etc. They are all oily products, and their common disadvantages are: all use toluene, di Toluene, ethyl acetate, butyl acetate and other harmful volatile solvents

It has high requirements on construction conditions and is extremely harmful to the environment, which greatly increases the chances of operators and users suffering from respiratory di...

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Method used

[0060] Due to the addition of the adhesion promoter, the gloss and solvent resistance of the coating are improved, and the improvement effect on flexibility a...

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Abstract

The invention provides a water-based paint applied in aluminum-plastic plates and a color steel coiled material. The water-based paint comprises the following components by weight: 30-55 parts of water soluble acrylic resin, 5-10 parts of water-based polyurethane resin, 4-10 parts of water soluble amino resin, 0.1-2 parts of a water-based dispersion agent, 0.1-2 parts of a water-based leveling agent, 0.1-2 parts of a water-based defoaming agent, 20-30 parts of water for the paint, 3-8 parts of an adhesion promoter, and 0.5-2 parts of a nano fumed silica slurry. The water-based paint has the main volatile which is water, thereby having no harm to the environment and operators. The water-based paint has the product quality which is equal to or slightly higher than the coating effect of an oily product. Moreover, the water-based paint has fast drying speed, can satisfy continuous and high-speed production in aluminum-plastic plate industry, and does not affect the production efficiency. Compared with an oily acrylic amino stoving varnish, the water-based paint has excellent solvent resistance, and has quite good market popularizing value.

Application Domain

Polyurea/polyurethane coatings

Technology Topic

SolventDefoaming Agents +10

Image

Examples

Experimental program(3)

Example Embodiment

[0022] The preparation method of nano fumed silica slurry is to add 5 parts of aqueous dispersant and 2 parts of aqueous wetting agent to 100 parts of ethanol and stir until uniform, then add 20 parts of fumed silica and stir until uniform, soak for 24 hours and then grind Finish the preparation to a fineness of 2μm

[0023] The properties of the components used in the present invention are described as follows:

[0024] Water-soluble acrylic resin: an acrylic resin that contains enough polar groups or ions in the main chain or side chain to be soluble in water; mainly includes poly(meth)acrylic acid, poly(meth)acrylamide and some N-substituted poly(meth)acrylamide, poly(meth)acrylate, etc.; used in the embodiment of the present invention, purchased from Tianjin Ziming Chemical Co., Ltd., and the product model is 503.

[0025] Water-soluble amino resin: It is an amino resin that is soluble in water. The amino resin used in the embodiment of the present invention was purchased from Tianjin Ziming Chemical Co., Ltd.; the product model is 322.

[0026] Water-based polyurethane resin: also known as water-dispersed polyurethane, water-based polyurethane or water-based polyurethane. The water-based polyurethane resin used in the examples of the present invention was purchased from Nanchang Yushi Company; the product model is 2100B.

[0027] Aqueous dispersant: purchased from Efka Company in the specific embodiment of the present invention, and the product model is 4560

[0028] Fumed silica: molecular formula: SiO 2 , Is white fluffy powder, porous, non-toxic, tasteless and non-polluting. The specific embodiment of the present invention is purchased from Degussa, and the product model is R-972.

[0029] Water-based leveling agent: it is a leveling agent for coatings. The specific embodiment of the present invention is purchased from BYK, and the product model is byk333.

[0030] Aqueous wetting agent: The specific embodiment of the present invention is purchased from BYK, and the product model is BYK-346.

[0031] Aqueous defoamer: the specific embodiment of the present invention is purchased from Tego Company, and the product model is TEGO-825.

[0032] Aqueous dispersant: the specific embodiment of the present invention is purchased from Tego, the product model is 4560.

[0033] Branched polyester resin: a branched polyester resin with a hydroxyl group, purchased from Shanghai Chenda Chemical Co., Ltd. (RSF-161) used in the specific embodiment of the present invention, and its physical and chemical properties are as follows:

[0034] Acid value: ≤0.45mg KOH/g

[0035] Viscosity: 500-600mpas/25℃

[0036] Color value: 30

[0037] Specific gravity: 1.65±0.05(25℃)

[0038] Equivalent weight: 1000-1200.

[0039] The above-mentioned components can also be selected from other commonly used components in the coating field, and are not limited to the specific source records in this specification.

Example Embodiment

[0041] Example 1 White paint used for surface coating of aluminum composite panel

[0042] First, the adhesion promoter is prepared, and the preparation method is as follows:

[0043] 1) Take 100g of branched polyester resin and 5g of N,N-dimethylethanolamine and mix and stir; the stirring time is 20min;

[0044] 2) Then 50g of N-methylpyrrolidone and 5g of 3-(2,3-epoxypropoxy)propyltrimethoxysilane are mixed and stirred; the same is stirred for 20min;

[0045] 3) Raise the temperature of the mixed solution prepared in step 1) to 95°C, and then add dropwise the solution prepared in step 2) (add it within 10-15 minutes), stir and react for 30 minutes, and then cool to 40 after the reaction is complete After temperature, 1g of N,N-dimethylacetamide was added, and the preparation was completed after stirring for 20 minutes.

[0046] To prepare nano fumed silica slurry, add 5 g of aqueous dispersant and 2 g of aqueous wetting agent to 100 ml of ethanol (1 ml of ethanol and water are used as one part in the specification of the present invention, and one gram of other substances as one part), and stir until uniform. Then add 20 parts of fumed silica and stir until uniform, soak for 24 hours and grind to a fineness of 2 μm to complete the preparation;

[0047] Then prepare according to the following components:

[0048]

[0049]

[0050] After mixing the above-mentioned components uniformly, the finished water-based paint is obtained. In order to have a better effect during use, the product can be filtered.

Example Embodiment

[0051] Example 2 Silver paint used for surface coating of aluminum composite panel

[0052] Silver paint for surface coating of aluminum-plastic panels, the distribution ratio of each group (by weight):

[0053]

[0054] The adhesion promoter and the nano fumed silica slurry are prepared by the method described in Example 1, but the amount of the components can be adjusted within the scope of the description of the invention.

[0055] When formulating the paint, add water-soluble acrylic resin, water-soluble amino resin, water-based polyurethane resin, water-based leveling agent, water-based dispersant, adhesion promoter, and water-based defoamer into a clean container in sequence, stir evenly, and filter (Filter with 800 mesh filter) for use; then mix and stir with nano fumed silica slurry for 30 minutes, then add aluminum slurry and water and stir evenly to obtain a finished water-based paint. In order to have a better effect during use, the product needs to be filtered (select 60-300 filters according to the fineness of the aluminum paste).

[0056] The water-based paint of the present invention has good water solubility of the water-soluble acrylic resin, can be miscible with water in any ratio, and has quick-drying properties (surface drying, hard drying). Additives (water-based dispersant, water-based leveling agent, water-based defoamer) are imported water-based products with high efficiency and low pollution. Its pigment does not contain heavy metals.

[0057] The specific use effect shows that the product of the present invention is non-toxic, non-irritating, and non-heavy metal, improves the construction environment, and ensures the health of the user. In terms of performance, it also has better gloss and solvent resistance than the original paint.

[0058]

[0059]

[0060] Since the addition of the adhesion promoter improves the gloss and solvent resistance of the coating, it has a significant improvement effect on flexibility and adhesion. The addition of nano fumed silica slurry makes the coating denser and greatly improves the solvent resistance of the coating.

[0061] The present invention is different from traditional paint formulations in that the raw materials used are all aqueous systems, which are non-toxic, harmless, non-irritating, safe and environmentally friendly. The production equipment and tools can be cleaned with water, which reduces the labor intensity of the construction personnel, does not endanger the health of the construction personnel, and also greatly reduces the production and use costs. In the case of the same basic formula, changing different pigments can meet the customer's color needs.

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PUM

Property	Measurement	Unit
Acid value	<= 0.45	mgKOH/g
Viscosity	500.0 ~ 600.0	mPa
tensile		MPa
Particle size		Pa
strength	10

Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

High speed production
Fast drying

Water-based paint applied in aluminum-plastic plates and color steel coiled material

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Image

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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