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Hydrophilic additive for solvent based coating and preparation method of hydrophilic additive

A water-assisted and solvent-based technology, used in polyester coatings, antifouling/underwater coatings, coatings, etc., which can solve the problems of complex synthesis process and unsuitable industrial production.

Inactive Publication Date: 2018-03-30
SHANGHAI HUAYI FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN105440292A discloses the design and preparation of a branched hydrophilic additive, which uses polyhydroxy branched resins, oligomers or branched monomers as the core, and is soluble in benzenes, esters, etc. through graft modification Conventional solvents, and non-ionic fluorocarbon surfactants grafted with diisocyanate and polyglycol to hydroxyl groups can improve the hydrophilicity and stain resistance of the coating film, but the synthesis process is complicated and not suitable for industrial production

Method used

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  • Hydrophilic additive for solvent based coating and preparation method of hydrophilic additive
  • Hydrophilic additive for solvent based coating and preparation method of hydrophilic additive
  • Hydrophilic additive for solvent based coating and preparation method of hydrophilic additive

Examples

Experimental program
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Effect test

Embodiment 1

[0027] In a four-neck flask equipped with a stirring device, a dropping device, a thermometer and a condenser tube, add a mixed solvent of 140 grams of triethoxysilane, 6 grams of ethanol, and 14 grams of dipropylene glycol butyl ether, mix 0.1 grams of glacial acetic acid, 12.2 After stirring the mixed solvent of 1 gram of water, 8.31 gram of ethanol and 19.39 gram of dipropylene glycol butyl ether evenly, the temperature was raised to 50°C, and the dropwise addition was completed within 1.5 hours. After 5 hours of reaction, the temperature was gradually raised to 140°C, and the distillation time of the solvent was controlled within 2 hours. , Continue to react for 3h, cool and discharge.

Embodiment 2

[0029] In a four-necked flask equipped with a stirring device, a dropping device, a thermometer and a condenser tube, a mixed solvent of 140 grams of trimethoxysilane, 10 grams of methanol, and 10 grams of butyl glycol ether was added, and 0.1 grams of phosphoric acid, 13.9 grams of Stir the mixed solvent of water, 13 grams of methanol and 13 grams of ethylene glycol butyl ether evenly, raise the temperature to 50°C, and drop it within 1.5 hours, react for 5 hours, gradually raise the temperature to 150°C, and control the distillation time of the solvent within 2 hours , Continue to react for 3h, cool and discharge.

Embodiment 3

[0031] In a four-necked flask equipped with a stirring device, a dropping device, a thermometer and a condenser tube, a mixed solvent of 140 grams of tetramethoxysilane, 10 grams of butanol, and 10 grams of ethyl acetate was added, and 0.1 grams of phosphoric acid, 13.2 grams of After the mixed solvent of water, 13.35 grams of butanol and 13.35 grams of ethyl acetate was stirred evenly, the temperature was raised to 50°C, and the dropwise addition was completed within 1.5 hours. After 5 hours of reaction, the temperature was gradually raised to 140°C, and the distillation time of the solvent was controlled within 2 hours. Continue to react for 3h, cool and discharge.

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PUM

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Abstract

The invention relates to a hydrophilic additive for solvent based coating and a preparation method of the hydrophilic additive. The formula of the hydrophilic additive is prepared from the raw materials by weight percent, 55% to 80% silicane, 0.01% to 0.1% a catalyst, 15% to 30% a solvent and 3% to 8.5% deionized water. The silicane is selected from silicane containing a linear chain or annular alkane. The catalyst is selected from one or more of glacial acetic acid, phosphoric acid, hydrochloric acid, sulfuric acid and nitric acid. The molar ratio of the deionized water and the silicane is (0.6 to 0.9) to 1. The solvent is selected from one or more of methyl alcohol, ethyl alcohol, butyl alcohol, ethylene glycol butyl ether, dipropylene glycol mono butyl ether, acetic ether and xylene. According to the hydrophilic additive for the solvent based coating and the preparation method of the hydrophilic additive, through hydrolysis and polycondensation reactions of silicane, polysiloxane with certain polymerization degree is synthesized, and has excellent compatibility with different resin systems, alkoxy contained in polysiloxane can generate a silicon hydroxyl after being subjected tohydrolysis, so that a coating film has the hydrophilia, and accordingly the self-cleaning function of the coating film is improved.

Description

technical field [0001] The invention relates to a hydrophilic auxiliary agent for solvent-based coatings and a preparation method thereof. The hydrophilic auxiliary agent is a polysiloxane-type coating auxiliary agent with a certain degree of polymerization, and is suitable for adding fluororesins, polyester resins, In silicon-modified polyester resin, acrylic resin, polyurethane, epoxy resin and other systems, it can make the coating film hydrophilic, with self-cleaning function and anti-pollution performance. Background technique [0002] In daily life, people widely use various coatings to protect and decorate outdoor facilities, but dust, dirt and other substances in the atmospheric environment are easy to accumulate on the surface of the coating, causing the coating to turn black and affecting the aesthetics. Ordinary coatings have poor hydrophilicity. When it rains, it is difficult for the rain to wash off the dirt, but it is easy to form rain marks on the surface of t...

Claims

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Application Information

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IPC IPC(8): C09D5/16C09D167/00C08G77/04C08G77/06
CPCC09D5/165C08G77/04C08G77/06C08L2205/03C09D167/00C08L61/20C08L83/04
Inventor 党常华丁奋吴文希顾圣杰
Owner SHANGHAI HUAYI FINE CHEM CO LTD