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Cathodic electrophoretic paint and preparation method thereof

A cathodic electrophoretic coating and monomer technology, applied in electrophoretic coatings, epoxy resin coatings, polyurea/polyurethane coatings, etc., can solve problems such as uneven extinction and poor extinction effect

Active Publication Date: 2021-08-24
和平县长丰环保新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the electrophoretic coating process, when the matting powder is added to the electrophoretic coating, the matting is often uneven and the matting effect is poor
[0004] In addition, using the main resin of electrophoretic paint to synthesize insoluble microgel is another method to manufacture products with matting effect, but this method has the same defect as adding matting powder: uneven matting

Method used

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  • Cathodic electrophoretic paint and preparation method thereof
  • Cathodic electrophoretic paint and preparation method thereof
  • Cathodic electrophoretic paint and preparation method thereof

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preparation example Construction

[0050] A method for preparing cathodic electrophoretic paint in one embodiment includes step S110 to step S130. specifically:

[0051] Step S110, reacting the amino group-containing compound with the epoxy resin to obtain a modified epoxy resin.

[0052] Specifically, a ring-opening reaction occurs between the amino group-containing compound and the epoxy resin to obtain a modified epoxy resin. Further, the temperature of the ring-opening reaction is 80°C to 100°C.

[0053] Specifically, the amino group-containing compound is at least one selected from methylamine, N-methylethanolamine and diethanolamine. Further, the amino group-containing compound is diethanolamine.

[0054] Specifically, the epoxy resin is a medium molecular weight epoxy resin, such as E-12, E-14, E-20 and the like. When the molecular weight of the epoxy resin is too small and the compatibility with the acrylic resin is too good, the gloss of the final paint film will be high. When the molecular weight...

Embodiment 1～ Embodiment 3

[0089] (1) Take the components of each embodiment according to Table 1.

[0090] Table 1

[0091]

[0092]

[0093] (2) Mix the polyisocyanate of each embodiment with the corresponding first solvent respectively, then raise the temperature to 45°C-50°C, add the sealing agent corresponding to each embodiment dropwise, the dropping time is 3h-3.5h, after the dropwise Insulated for 4 hours to obtain the blocked isocyanate curing agent of each embodiment.

[0094] (3) The amino group-containing compound, the corresponding epoxy resin and the second solvent of each embodiment were mixed respectively, and then heated to 90° C. for 3 h to obtain the modified epoxy resin of each embodiment.

[0095] (4) At 90°C, after mixing the monomers of the acrylic resins of each embodiment and the initiator, they are added dropwise to the modified epoxy resins corresponding to each embodiment prepared in step (3), and the dropping time is After 3 hours of dripping, the initiator was incub...

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PUM

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Abstract

The invention relates to a cathodic electrophoretic paint and a preparation method thereof. The cathodic electrophoretic paint acrylic resin and modified epoxy resin, the acrylic resin contains amino group and hydroxyl group, and the modified epoxy resin contains amino group. The matting effect of the cathodic electrophoretic paint is uniform.

Description

technical field [0001] The invention relates to the technical field of electrophoretic paint, in particular to a cathodic electrophoretic paint and a preparation method thereof. Background technique [0002] With the development of coating, the surface effect of the product after coating is diversified. In recent years, products with a low-gloss finish after painting have become more and more popular. [0003] The main way to achieve a low gloss effect on a painted product is by coating matting. For example, a good matting effect can be achieved by dispersing matting powder (such as ultrafine silica, paraffin, filler, etc.) into the paint of spraying process or roller coating process. However, in the electrophoretic coating process, when the matting powder is added to the electrophoretic coating, the matting is often uneven and the matting effect is poor. [0004] In addition, using the main resin of electrophoretic coatings to synthesize insoluble microgels is another me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/44C09D133/14C09D163/00C09D175/04
CPCC09D5/4411C09D5/4434C09D5/4473C09D5/4476C09D5/4488
Inventor 徐才智黄育朋
Owner 和平县长丰环保新材料有限公司