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A kind of phosphate ester modified cationic microgel, preparation method and application

A phosphate ester, microgel technology, applied in the field of polymers, can solve problems such as undiscovered

Active Publication Date: 2022-02-11
LANGFANG NIPPON PAINT +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In the above-mentioned published technical documents, a variety of preparation methods for the preparation of cationic microgels for electrophoretic coatings are mentioned, but there is no clear mention of introducing phosphate repeating units into the molecular chain to prepare phosphate-modified cationic microgels. Examples of practical applications

Method used

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  • A kind of phosphate ester modified cationic microgel, preparation method and application
  • A kind of phosphate ester modified cationic microgel, preparation method and application
  • A kind of phosphate ester modified cationic microgel, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] In the first step, 740 parts of bisphenol A type epoxy resin (EEW=185), 37 parts MAP L-210 (common name laureth-1 phosphate) (Solvay (Solvay) company product, acid value is 180, and the quality of bifunctional phosphoric acid derivatives accounts for 5% of the quality of the first multifunctional epoxy resin. %) and 324 parts of bisphenol A were added to a 5L reactor, and then the reaction system was heated to 120°C. After the reaction raw materials are melted to form a transparent liquid, add 14.8 parts of triphenylphosphine (the quality of the alkali catalyst accounts for 2% of the mass of the first multifunctional epoxy resin), and the reaction system is heated up to 145 ° C, and kept at this temperature 2h. When the epoxy equivalent reaches the design value of 1200, the temperature of the reaction system is lowered to 110° C., and 275 parts of ethylene glycol butyl ether are added to reduce the viscosity to obtain a solid content of 80% of the main chain with epox...

Embodiment 2

[0073] In the first step, 740 parts of bisphenol A type epoxy resin (EEW=185), 74 parts of phenylphosphoric acid (molecular weight is 158, the quality of phosphoric acid derivative accounts for 10% of the quality of the first polyfunctionality epoxy resin) and Add 205 parts of bisphenol F into a 5L reactor, and then raise the temperature of the reaction system to 120°C. After the reaction raw materials are melted to form a transparent liquid, add 7.4 parts of tetrabutylphosphonium bromide (the quality of the base catalyst accounts for 1% of the first multifunctional epoxy resin quality), the reaction system is heated up to 140 ° C, and at this temperature Keep warm for 3h. When the epoxy equivalent reaches the design value of 1000, the temperature of the reaction system is lowered to 110° C., and 340 parts of diethylene glycol butyl ether is added to reduce the viscosity, so that a solid content of 75% is obtained. 1. A macromolecular epoxy resin containing phosphate repeatin...

Embodiment 3

[0077]In the first step, 740 parts of bisphenol A type epoxy resin (EEW=185), 7.4 parts of butyl phosphoric acid (molecular weight is 136, the quality of phosphoric acid derivative accounts for 1% of the quality of the first polyfunctional epoxy resin) and 240 parts of bisphenol S were added into a 5L reactor, and then the temperature of the reaction system was raised to 120°C. After the reaction raw materials are melted to form a transparent liquid, add 0.74 parts of N,N-dimethylbenzylamine (the mass of the base catalyst accounts for 0.1% of the mass of the first multifunctional epoxy resin), raise the temperature of the reaction system to 160°C, and Insulate at this temperature for 4h. When the epoxy equivalent reaches the design value of 500, the temperature of the reaction system is lowered to 110° C., and 635 parts of propylene glycol methyl ether is added to reduce the viscosity, so that a solid content of 60% is obtained. A macromolecular epoxy resin containing phospha...

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Abstract

The invention discloses a phosphate-modified cationic microgel, its preparation method and application, which comprises the following components in parts by weight: 5-50 parts of the first multifunctional epoxy resin; 5-25 parts of the chain extender; 0.5-5 parts of phosphoric acid derivatives; 10-25 parts of organic solvents; 0.05-1 parts of base catalysts; 5-25 parts of secondary and / or primary amine compounds containing at least 2 hydrolyzable groups; 2.5-15 parts of acids ; 7.5 to 40 parts of pure water; 2.5 to 10 parts of the second multifunctional epoxy resin. The invention can provide the same anti-corrosion effect, can improve the coverage rate and edge anti-corrosion property of the electrophoretic paint on the edge of the workpiece, and can strengthen the anti-corrosion property of the paint film.

Description

technical field [0001] The invention belongs to the technical field of macromolecules, and in particular relates to a phosphate-modified cationic microgel, a preparation method and an application. Background technique [0002] Since the 1970s, cathodic electrophoretic coatings have been more and more widely used in many industries, especially the automotive industry, due to their own advantages. As we all know, during the high-temperature baking and curing process of cathodic electrophoretic coatings, due to the gradual increase of the fluidity of the coating film, the paint film will shrink during the cross-linking and curing process, making the edge of the workpiece, especially the edge of the workpiece with sharp edges The coating film coverage of the parts is too low, and the paint film thickness is too thin, which reduces the anti-corrosion performance of these parts. Due to the particularity of automobile products, automobile manufacturers have put forward higher requ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/075C08L63/00C09D5/44C09D7/65
CPCC08J3/075C09D5/448C08J2363/00
Inventor 张萌夏天渊吴桂兰李舫曾燕勤陈洁琼李克梅鹏
Owner LANGFANG NIPPON PAINT
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