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Waterborne acrylic amino baking varnish and preparation method thereof

A technology of acrylic amino and acrylic resin, which is applied in the direction of coating, etc., to achieve the effect of high application value, high distinctness of image, and low construction VOCC

Pending Publication Date: 2019-11-26
NIPPON PAINT IND COATINGS SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the product has high requirements for aging resistance and water resistance, it is difficult to meet the requirements.

Method used

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  • Waterborne acrylic amino baking varnish and preparation method thereof
  • Waterborne acrylic amino baking varnish and preparation method thereof
  • Waterborne acrylic amino baking varnish and preparation method thereof

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preparation example Construction

[0043] The preparation method of the above-mentioned water-based acrylic amino baking varnish provided by the second aspect of the present invention, in a specific embodiment, comprises the following steps:

[0044] Mix the secondary dispersion of hydroxyl-type acrylic resin, amino resin, pH regulator, amino resin co-solvent, defoamer, surfactant ethoxyl acetylene glycol, and stir; preferably, stir at 400-600rpm for 10- 15min;

[0045] Add resin-free water slurry while stirring, and continue stirring; preferably, stir at 400-600rpm for 10-15min;

[0046] Add substrate wetting agent, anti-foaming additive, leveling agent, film-forming additive, acid catalyst while stirring, and continue stirring; preferably, stir at 400-600rpm for 30min until uniform;

[0047] Add a thickener to obtain a product with a viscosity that meets the requirements;

[0048] Wherein, the addition of each raw material is carried out according to certain parts by weight.

[0049] The present invention ...

Embodiment 1

[0053] Preparation of waterborne acrylic amino baking varnish

[0054] (1) The secondary dispersion acrylic resin of 45.5kg is added in the container of suitable size, slowly 2kg pH regulator, 3kg amino resin co-solvent are added and stirred while stirring, 0.1kg organosilicon defoamer, stir (400 -600rpm) 10-15 minutes;

[0055] (2) Slowly add 8.24kg of amino resin while stirring, after adding the amino resin, stir (400-600rpm) for 10-15 minutes;

[0056] (3) Slowly add 34kg of white slurry while stirring, and continue stirring for 30 minutes until uniform;

[0057] (4) Slowly add 0.2kg of substrate wetting agent, 2.4kg of surfactant, 1kg of anti-explosion foam additive, 0.2kg of leveling agent, 0.26kg of acid catalyst, and 3kg of film-forming additive while stirring;

[0058] (5) Test the viscosity, add an appropriate amount of thickener as required, stir (400-600rpm) for 10-15 minutes, filter and pack.

Embodiment 2

[0060] The preparation method of the water-based acrylic amino baking varnish in Example 2 and Example 3 is exactly the same as that of Example 1, except that the weight of the added substances is changed, see Table 1 for details.

[0061] The component of water-based acrylic amino stoving varnish in table 1 embodiment 1-3

[0062]

[0063] Dilute the water-based acrylic amino baking varnish prepared in Example 1-3 to 20-25 seconds (coated with -4 viscosity cup, 25°C), wet-on-dry spraying on the gray electrophoretic primer and polished tinplate, (Iwata 101 spray gun, Spraying pressure 0.4MPa, control dry film thickness 20-25μm), leveling for about 10min, and finally bake at 150℃×20min to get the paint film coating applied on light machine. The performance of the obtained paint film coating was tested. The performance of the single coating on the tinplate is shown in Table 2, and the performance of the composite coating on the gray electrophoretic primer is shown in Table 3....

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Abstract

The invention discloses a waterborne acrylic amino baking varnish, which comprises the following components by weight: 30-60 parts of hydroxyl type acrylic resin secondary dispersoid, 5-15 parts of amino resin, 20-40 parts of resin-free water slurry, 3-6 parts of an amino resin cosolvent, 1-5 parts of a surfactant ethoxyalkynediol, 3-6 parts of a film-forming assistant, 0-1 part of a pH regulator,0-1 part of a defoaming agent, 0-1 part of a base material wetting agent, 0-1 part of a leveling agent, 0-1 part of anti-explosion foaming aid, 0-1 part of an acid catalyst and 0-1 part of a thickener. While having excellent weather resistance, high gloss and high distinctness of image, a paint film prepared from the waterborne acrylic amino baking varnish also has extremely low construction VOCC, and has great application value.

Description

technical field [0001] The invention relates to the field of industrial color paints. More specifically, it relates to a water-based acrylic amino baking varnish and a preparation method thereof. Background technique [0002] In recent years, as people pay more and more attention to environmental protection, the state has also strengthened the supervision of environmental protection, and put forward new requirements for the coating in the industrial field, transforming from the traditional model to the environment-friendly model, so the water-based The industrial coatings industry has entered a period of rapid development. In the field of general industrial coatings, especially in the light machine coatings industry, application clients have also put forward higher and higher requirements for the appearance of products. For example, in order to expand the market share, customers are constantly upgrading products in terms of product functionality and practicability. In orde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/04C09D161/20C09D7/63
CPCC09D133/04C09D7/63C08L61/20C08K5/06
Inventor 张艳学李春生
Owner NIPPON PAINT IND COATINGS SHANGHAI
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