Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Synthetic method of phosphoric acid-type polyaniline for preparing anti-corrosion coating

A technology of anti-corrosion coatings and synthesis methods, applied in anti-corrosion coatings, coatings, etc., can solve problems affecting the coating of polyaniline anti-corrosion coatings, affecting anti-corrosion performance, and complicated preparation processes

Inactive Publication Date: 2016-04-20
CHINA PETROLEUM & CHEM CORP +1
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of this invention is to provide a kind of synthesis method of the phosphoric acid polyaniline that is used for preparing anticorrosion coating, to solve the following problems that existing polyaniline anticorrosion coating exists: The technical problem of pitting corrosion caused by excessive oxidation affects the anti-corrosion performance; (2) The preparation process of polyaniline / silicon dioxide composite anti-corrosion coating is complicated; Evenly coats metal surfaces

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take 9.3g of aniline and 91.2g of 25% ammonium persulfate aqueous solution, and add them dropwise to 88g of aqueous solution containing 10.0% of methanedisulfonic acid and 5.7% of phosphoric acid at the same time with a constant flow pump respectively. Stir. After reacting for 10 hours, the polyaniline product doped with phosphoric acid-methanedisulfonic acid is obtained after washing with water, neutralization until the pH is not greater than 5, washing with acetone, and vacuum drying. Add this product to polyurethane solvent to make phosphoric acid polyaniline anticorrosion coating according to the addition amount of 1%.

Embodiment 2

[0022] Take 9.3g of aniline and 91.2g of 25% ammonium persulfate aqueous solution, and add them dropwise to a reactor containing 100g of an aqueous solution containing 10.0% sodium tripolyphosphate and 10.0% sulfuric acid with a constant flow pump respectively. Stir. After reacting for 15 hours, the phosphoric acid-sulfuric acid doped polyaniline was obtained after washing with water, neutralization until the pH value was not greater than 5, washing with acetone, and vacuum drying. Add this product to polyurethane solvent to make phosphoric acid polyaniline anticorrosion coating according to the addition amount of 1%.

Embodiment 3

[0024] Get 12.1g of 3,5-dimethylaniline, 152.0g of 15% ammonium persulfate aqueous solution, add dropwise in the reactor that 100g contains the aqueous solution of phosphoric acid 5.7%, sulfuric acid 10.0% respectively with constant flow pump, reaction temperature is -10°C, keep stirring. After reacting for 20 hours, after washing with water, neutralizing until the pH value is not greater than 5, washing with acetone, and drying in vacuum, the poly-m-methylaniline doped with phosphoric acid-sulfuric acid is obtained. Add this product to epoxy resin solvent to make phosphoric acid polyaniline anticorrosion coating according to the addition amount of 2%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a synthetic method of phosphoric acid-type polyaniline for preparing an anti-corrosion coating. The synthetic method includes the following steps: 1) adding an aniline monomer, an oxidant and a water solution containing a phosphorus-containing medium acid into a reactor at -20 - 50 DEG C; 2) performing a reaction under the condition of pH <= 3 for 0.5-30 h; and 3) washing, neutralizing and drying a reaction product to prepare a polyaniline finish product. The polyaniline finish product can be added to a solvent according to certain ratio to prepare the phosphoric acid-type polyaniline anti-corrosion coating. The polyaniline anti-corrosion coating can form a compact oxidation film on surface of metal, so that pitting corrosion caused by excessive oxidization due to excessive direct contact between the polyaniline and the surface of metal can be avoided, thereby achieving corrosion resistance on metal.

Description

technical field [0001] The invention belongs to the technical field of anticorrosion coatings, and relates to a synthesis method of phosphoric acid polyaniline. Background technique [0002] Polyaniline is a new type of functional polymer material, commonly known as conductive plastic. It is a special functional material. It has the density of plastic, the conductivity of metal and the processability of plastic. It also has the chemical and chemical properties that metal and plastic lack. Electrochemical performance is a chemical material that won the Nobel Prize. Because of its unique chemical, electrochemical and optical properties, it has broad prospects in the fields of energy, electromagnetic shielding and electrochromism. Related industries involve electronic chemicals, Many aspects such as shipbuilding industry, petrochemical industry, and military stealth materials have become popular materials for research and development by countries all over the world. [0003] W...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08G73/02C09D179/02C09D5/08
Inventor 陈永平金汉强吴其建金玉存司马维维周亚芩
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com