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A kind of anti-indentation amino baking varnish and preparation method thereof

An amino baking varnish and anti-indentation technology, which is applied in coatings, polyester coatings, etc., can solve problems such as inability to assemble vehicles, indentations on the contact surface of the wheel hub, and affect the appearance, and achieve the effect of improving the product qualification rate

Active Publication Date: 2020-05-15
LANGFANG NIPPON PAINT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coating of automobile wheels generally includes primer, base paint and varnish. These coatings need to be baked at least 140°C to cure and form a film. In order to improve production efficiency, manufacturers usually pile up and store the wheels after they are off-line to save space. Due to the influence of weight and temperature, the contact surface of the stacked wheels will have indentations, which will affect the appearance. In serious cases, they cannot be assembled into vehicles.

Method used

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  • A kind of anti-indentation amino baking varnish and preparation method thereof
  • A kind of anti-indentation amino baking varnish and preparation method thereof
  • A kind of anti-indentation amino baking varnish and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Table 2: Example 1 components and their content (parts by weight)

[0046]

[0047]

[0048] Step 1: Add 4 parts of solvent S-100# solvent into the stirring tank, slowly add 4 parts of anti-sagging agent PZS 1016 and 18.5 parts of amino resin US-138BB-70 in a stirring state, and stir at 150r / min 8min;

[0049] Step 2: Slowly add 4 parts of propylene glycol methyl ether acetate, 2 parts of n-butanol, 42.3 parts of polyester modified thermosetting acrylic resin SWK 337, 2 parts of blocked isocyanate resin BL 3175, and 0.2 parts of leveling Agent BYK-315, 0.2 parts of ultraviolet absorber TINUVIN-400, 0.1 part of light stabilizer TINUVIN-292 and 1.5 parts of adhesion promoter AA9999, after feeding, increase the stirring speed to 350r / min and continue stirring for 30min before filtering, The discharge obtains the described anti-indentation amino baking varnish applied to the varnish coating of automobile hubs.

[0050] Dilute the viscosity of the anti-indentation am...

Embodiment 2

[0062] Components and content of embodiment 2 are shown in Table 5,

[0063] Table 5: Embodiment 2 components and their contents (parts by weight)

[0064]

[0065] Step 1: Add 6 parts of solvent S-100# solvent into the stirring tank, slowly add 4.8 parts of anti-sagging agent PZS 1016 and 18.5 parts of amino resin US-138BB-70 at a stirring speed of 250r / min, and stir 15min;

[0066] Step 2: Slowly add 9 parts of propylene glycol methyl ether acetate, 5 parts of n-butanol, 55 parts of polyester modified thermosetting acrylic resin HR 7054, 3 parts of blocked isocyanate resin, and 0.3 parts of leveling agent BYK -315, 0.3 parts of UV absorber TINUVIN-400, 0.2 parts of light stabilizer TINUVIN-292 and 1.9 parts of adhesion promoter AA 9999, after feeding, increase the stirring rate to 550r / min and continue stirring for 40min before filtering and discharging The described anti-indentation amino baking varnish that is applied to the varnish coating of automobile hubs is obtai...

Embodiment 3

[0068] The components and content of embodiment 3 are shown in Table 6,

[0069] Table 6: Embodiment 3 components and their contents (parts by weight)

[0070]

[0071] Step 1: Add 5 parts of solvent S-100# into the stirring tank, slowly add 4.8 parts of anti-sagging agent PZS 1016 and 21.6 parts of amino resin BR 20SE at a stirring speed of 200r / min, and stir for 10 minutes;

[0072] Step 2: Slowly add 9 parts of propylene glycol methyl ether acetate, 2 parts of n-butanol, 42.3 parts of polyester modified thermosetting acrylic resin SWK 337, 2.2 parts of blocked isocyanate resin, and 0.3 parts of leveling agent BYK -315, 0.25 parts of UV absorber TINUVIN-400, 0.15 parts of light stabilizer TINUVIN-292 and 1.9 parts of adhesion promoter AA9999. After feeding, increase the stirring speed to 450r / min and continue stirring for 35 minutes before filtering and discharging The described anti-indentation amino baking varnish applied to the finish coating of automobile hubs is obt...

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Abstract

The invention discloses an anti-indentation amino baking varnish which can be used for the finish coating of automobile hubs and a preparation method thereof. The anti-indentation amino baking varnish of the invention mainly includes the following components in weight percentage: polyester modified thermosetting acrylic resin 42 ‑55 parts by weight; 2‑3 parts by weight of blocked isocyanate resin; 18‑22 parts by weight of amino resin; 6‑8 parts by weight of auxiliary agent; 10.0‑20.0 parts by weight of solvent. The invention is mainly applied to the finish coating of automobile wheels, and uses polyester modified thermosetting acrylic resin and amino resin as the main body of the reaction to generate amino baking varnish with a pencil hardness of up to 2H, which can effectively solve the problems caused by the off-line coating of automobile wheels. The problem of indentation on the surface of the wheel hub caused by accumulation and extrusion can improve the product qualification rate of automobile wheel hub manufacturers. The preparation process of the invention is simple and suitable for industrialized production.

Description

technical field [0001] The invention relates to the technical field of coatings and preparation methods thereof. More specifically, it relates to an anti-indentation amino baking varnish that can be applied to the varnish coating of automobile hubs and a preparation method thereof. Background technique [0002] Amino baking varnish uses acrylic resin or alkyd resin and amino resin as the main film-forming substances. It is packaged in a single component at room temperature. At a higher temperature (about 140°C), chemical reactions occur between components to form a three-dimensional network Body structure, with high hardness, excellent adhesion, high gloss, good gloss and color retention and other properties, it is widely used in the coating of automobiles, ships and metal doors and windows. [0003] With the development of the automobile manufacturing industry, the demand for automobile wheels has been increasing year after year. Wheel manufacturers expect to shorten the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/00C09D167/00C09D161/32
CPCC08L2205/035C09D133/00C08L67/00C08L61/32
Inventor 齐见凯马永强张浩
Owner LANGFANG NIPPON PAINT
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