Preparation method of styrene-acrylic emulsion waterborne antirust paint based on composite modification of polydopamine/nano titanium oxide

A technology of nano-titanium oxide and polydopamine, applied in the direction of antifouling/underwater coatings, anti-corrosion coatings, coatings, etc., can solve the problems of affecting the appearance quality of the coating and losing the anti-rust effect, so as to improve the antibacterial and weather resistance performance and avoid hardness. Good aggregation and dispersion

Active Publication Date: 2017-09-08
SUZHOU ANTEK INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional anti-rust coating used as short-term anti-rust between steel processes has the advantages of simple process and good binding force, but it contains nitrite, chromate, phosphate a

Method used

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  • Preparation method of styrene-acrylic emulsion waterborne antirust paint based on composite modification of polydopamine/nano titanium oxide
  • Preparation method of styrene-acrylic emulsion waterborne antirust paint based on composite modification of polydopamine/nano titanium oxide

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Embodiment 1

[0030] A preparation method based on polydopamine / nano-titanium oxide composite modified styrene-acrylic emulsion water-based antirust paint, comprising the following steps:

[0031] (1) Mix cyclohexane and triethylamine evenly, add tetrabutyl titanate dropwise, stir for 30 minutes, transfer to a hydrothermal kettle, react at 150°C for 20 hours, and cool to room temperature after the reaction; The solution was transferred to a beaker, and a dopamine solution with a concentration of 5 mg / mL was slowly added to the beaker, and after ultrasonic stirring for 30 minutes, a precipitate was formed after adding excess ethanol, centrifuged, and the obtained solid was washed 3-5 times with absolute ethanol, and dried in vacuum. Obtain polydopamine-coated nano-titanium oxide; wherein, the volume ratio of cyclohexane, triethylamine, and tetrabutyl titanate is 50:5:1; the mass ratio of tetrabutyl titanate to dopamine solution is 3:5 ;

[0032] (2) Mix 1 / 2 of styrene, 1 / 2 of butyl acrylate...

Embodiment 2

[0037] A preparation method based on polydopamine / nano-titanium oxide composite modified styrene-acrylic emulsion water-based antirust paint, comprising the following steps:

[0038] (1) Mix and stir cyclohexane and triethylamine evenly, add tetrabutyl titanate dropwise, stir for 30 minutes, transfer to a hydrothermal kettle, and react at 150°C for 24 hours. After the reaction, cool to room temperature; The solution was transferred to a beaker, and a dopamine solution with a concentration of 5 mg / mL was slowly added to the beaker, and after ultrasonic stirring for 30 minutes, a precipitate was formed after adding excess ethanol, centrifuged, and the obtained solid was washed 3-5 times with absolute ethanol, and dried in vacuum. Obtain polydopamine-coated nano-titanium oxide; wherein, the volume ratio of cyclohexane, triethylamine, and tetrabutyl titanate is 50:5:1; the mass ratio of tetrabutyl titanate to dopamine solution is 3:5 ;

[0039] (2) Mix 1 / 2 of styrene, 1 / 2 of buty...

Embodiment 3

[0044] A preparation method based on polydopamine / nano-titanium oxide composite modified styrene-acrylic emulsion water-based antirust paint, comprising the following steps:

[0045] (1) Mix and stir cyclohexane and triethylamine evenly, add tetrabutyl titanate dropwise, stir for 30 minutes, transfer to a hydrothermal kettle, and react at 150°C for 21 hours. After the reaction, cool to room temperature; The solution was transferred to a beaker, and a dopamine solution with a concentration of 5 mg / mL was slowly added to the beaker, and after ultrasonic stirring for 30 minutes, a precipitate was formed after adding excess ethanol, centrifuged, and the obtained solid was washed 3-5 times with absolute ethanol, and dried in vacuum. Obtain polydopamine-coated nano-titanium oxide; wherein, the volume ratio of cyclohexane, triethylamine, and tetrabutyl titanate is 50:5:1; the mass ratio of tetrabutyl titanate to dopamine solution is 3:5 ;

[0046] (2) Mix 1 / 2 of styrene, 1 / 2 of buty...

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Abstract

The invention discloses a preparation method of styrene-acrylic emulsion waterborne antirust paint based on composite modification of polydopamine/nano titanium oxide. The preparation method comprises the following steps: first preparing nano titanium oxide by adopting a sol-gel method, adding a polydopamine solution into a nano titanium oxide stock solution, preparing polydopamine-coated nano titanium oxide under a weak base condition, so that the agglomeration of the nano titanium oxide in the drying process is avoided; and preparing a styrene-acrylic emulsion by adopting a traditional core-shell process, adding phosphate ester monomers and polydopamine-coated nano titanium oxide into a shell-layer monomer, wherein the prepared modified styrene-acrylic emulsion is good in performance. The prepared paint is good in film properties, high in adhesive force, excellent in antirust properties and good in mechanical properties.

Description

[0001] Technical field: [0002] The invention relates to the field of architectural coatings, in particular to a preparation method of a styrene-acrylic emulsion water-based antirust coating based on polydopamine / nano-titanium oxide composite modification. [0003] Background technique: [0004] The loss caused by metal corrosion is staggering, and one of the easiest and most effective ways to prevent rust and corrosion is to apply anti-rust and anti-corrosion coatings. The traditional anti-rust coating used as short-term anti-rust between steel processes has the advantages of simple process and good binding force, but it contains nitrite, chromate, phosphate and other substances, which pollute the environment in the morning and are easy to form on the surface Hoarfrost affects the appearance quality of the coating, thus losing the antirust effect. [0005] In recent years, with the development of science and technology, the enhancement of people's awareness of environmental ...

Claims

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Application Information

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IPC IPC(8): C09D151/00C09D5/14C09D5/08C09D7/12C08F257/02C08F212/08C08F230/02C08F220/18C08F2/44
CPCC08F2/44C08F257/02C08K2003/2237C08K2201/011C09D5/08C09D5/14C09D151/003C08L33/02C08K5/103C08K9/10C08K3/22
Inventor 包伟强
Owner SUZHOU ANTEK INDAL
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