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Oil-shrinking cathodic electrophoretic coating and preparation method thereof

A cathodic electrophoretic coating, polydimethylsiloxane technology, applied in electrophoretic coatings, epoxy resin coatings, polyurea/polyurethane coatings, etc., can solve the problem of failure to achieve multiple sustained effects, limit development and application, Paint film shrinkage and other problems

Active Publication Date: 2019-10-22
HAOLISEN CHEM TECH (JIANGSU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the paint film is dried in this way of electrophoresis, the additives flow to the surface of the paint film. Although it has the effect of shrinking oil, it cannot achieve the effect of repeated times, and with the extension of time, the original paint Due to its low surface tension, shrinkage additives will float on the surface of the original paint, causing shrinkage and other disadvantages of the paint film
Limit its development and application in the range hood field

Method used

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  • Oil-shrinking cathodic electrophoretic coating and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0034] A kind of shrink oil cathodic electrophoretic paint, comprises by weight parts:

[0035] 30 parts of toluene diisocyanate;

[0036] 5 parts of methyl isobutyl ketone;

[0037] 5 parts of carboxy-terminated polydimethylsiloxane;

[0038] 40 parts of ethylene glycol butyl ether;

[0039] 200 parts of epoxy resin;

[0040] 10 parts of acetic acid;

[0041] 900 parts of pure water.

[0042] In addition, a preparation method for preparing the above-mentioned shrink oil cathodic electrophoretic coating is provided: comprising the following steps,

[0043] Add toluene diisocyanate and methyl isobutyl ketone into a stirred and condensed reaction vessel, blow nitrogen, raise the temperature to 60±2°C, and then slowly drop carboxy-terminated polydimethylsiloxane into the reaction vessel , the dropping time is 30±5 minutes, the dropping process maintains the temperature at 60±2°C, after the dropping is completed, the temperature rises to 80±2°C, and the reaction takes 2 hour...

Embodiment 2

[0046] A kind of shrink oil cathodic electrophoretic paint, comprises by weight parts:

[0047] 65-70 parts of isophorone diisocyanate;

[0048] 10-15 parts of methyl isobutyl ketone;

[0049] 8-10 parts of amino-terminated polydimethylsiloxane;

[0050] 55-60 parts of ethylene glycol butyl ether;

[0051] 300-350 parts of epoxy resin;

[0052] 15-20 parts of acetic acid;

[0053] 900-1000 parts of pure water.

[0054] The preparation method is the same as the aforementioned method.

Embodiment 3

[0056] A kind of shrinkage cathodic electrophoretic paint, comprising by weight: 68 parts of diphenylmethane diisocyanate;

[0057] 13 parts of methyl isobutyl ketone;

[0058] 9 parts of amodimethicone;

[0059] 58 parts of ethylene glycol butyl ether;

[0060] 325 parts of epoxy resin;

[0061] 18 parts of acetic acid;

[0062] 950 parts of pure water.

[0063] The preparation method is the same as the aforementioned method.

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Abstract

The invention discloses oil-shrinking cathodic electrophoretic coating and a preparation method thereof. The preparation method comprises the following steps: adding isocyanate and methyl isobutyl ketone into a reaction container, inflating nitrogen, and stirring while heating; dropwise adding active H-containing terminated polydimethylsiloxane into the reaction container, heating after the completion of dropwise addition, and then cooling after the completion of a first reaction; continuing to dropwise add ethylene glycol butyl ether into the reaction container, heating, and then cooling foruse after the completion of a second reaction; adding epoxy resin into another reaction container, adding the prepared material into the reaction container, stirring, heating, and then adding acetic acid to neutralize resin; and stopping heating, adding purified water, and dispersing uniformly to obtain a finished product. The oil-shrinking electrophoretic coating has an excellent multiple and lasting oil-shrinking effect and hardness, and has the advantages of good original paint stability, easy application and the like.

Description

technical field [0001] The invention belongs to the technical field of cathodic electrophoretic coatings and preparation methods, and in particular relates to a shrink oil cathodic electrophoretic coating and a preparation method thereof. Background technique [0002] Electrophoretic coating is a new type of coating developed and industrialized in the mid-1970s. It has the advantages of environmental protection, high throwing power, high coating efficiency, good coating quality and high degree of application automation. The awareness of environmental protection is increasing day by day, relevant environmental protection laws and regulations impose strict restrictions on the content of volatile organic solvents, and the application of electrophoretic coatings is also becoming more and more extensive. [0003] Epoxy cathodic electrophoretic coatings have advantages such as strong adhesion, high temperature resistance, and chemical resistance. However, there are very few electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D175/04C09D5/44
CPCC09D163/00C09D5/4473C09D5/4488C08L75/04
Inventor 黄磊陈海波赵颖胡浩东黄诚诚朱婷婷
Owner HAOLISEN CHEM TECH (JIANGSU) CO LTD
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