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Castor oil modified emulsion for improving edge corrosion resistance of waterborne coating

A technology of water-based paint and castor oil, applied in anti-corrosion paint, coating, etc., can solve problems such as low grafting rate and unstable emulsion, achieve good compatibility, improve salt spray resistance, and increase reactivity

Active Publication Date: 2017-05-31
HAOLISEN CHEM TECH (JIANGSU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that castor oil is directly used for acrylic acid polymerization, which often leads to low grafting rate and unstable emulsion, so as to improve the reactivity of castor oil

Method used

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  • Castor oil modified emulsion for improving edge corrosion resistance of waterborne coating
  • Castor oil modified emulsion for improving edge corrosion resistance of waterborne coating
  • Castor oil modified emulsion for improving edge corrosion resistance of waterborne coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A. Castor oil modified monomer formula:

[0030]

[0031] After vacuum dehydration of castor oil, add castor oil, acetone, and organotin catalyst into a four-necked flask according to the formula, raise the temperature to 75°C, add isocyanate ethyl acrylate dissolved in p-hydroxyanisole dropwise, and add dropwise for 1.5 hours After the completion of the heat preservation at 75° C. for 1 hour, the NCO content was tested. After the NCO value was <1, the acetone was vacuum removed to obtain 132 parts of castor oil modified monomers.

[0032] B. Castor oil modified emulsion formula:

[0033] (1) Compound emulsifier formula:

[0034] 1 part nonionic emulsifier

[0035] Reactive emulsifier 3 parts

[0036] Prepare compound emulsifiers according to formula.

[0037] (2) Nuclear monomer pre-emulsion formula:

[0038]

[0039] Put vinyl monomers or vinyl aromatic compounds that do not contain carboxyl or hydroxyl groups, deionized water, composite emulsifiers and ini...

Embodiment 2

[0046] A. Castor oil modified monomer formula:

[0047]

[0048] After vacuum dehydration of castor oil, add castor oil, acetone, and organotin catalyst into a four-necked flask according to the formula, raise the temperature to 75°C, add isocyanate ethyl acrylate dissolved in p-hydroxyanisole dropwise, and add dropwise for 1.5 hours After the completion of the heat preservation at 75° C. for 1 hour, the NCO content was tested. After the NCO value was less than 1, the acetone was vacuum removed to obtain 120 parts of castor oil modified monomers.

[0049] B. Castor oil modified emulsion formula:

[0050] (1) Compound emulsifier formula:

[0051] 1 part nonionic emulsifier

[0052] Reactive emulsifier 3 parts

[0053] Prepare compound emulsifiers according to formula.

[0054] (2) Nuclear monomer pre-emulsion formula:

[0055]

[0056] Put vinyl monomers or vinyl aromatic compounds that do not contain carboxyl or hydroxyl groups, deionized water, composite emulsifier...

Embodiment 3

[0062] A. Castor oil modified monomer formula:

[0063]

[0064] After vacuum dehydration of castor oil, add castor oil, acetone, and organotin catalyst into a four-necked flask according to the formula, raise the temperature to 75°C, add isocyanate ethyl acrylate dissolved in p-hydroxyanisole dropwise, and add dropwise for 1.5 hours After the completion of the heat preservation at 75° C. for 1 hour, the NCO content was tested. After the NCO value was <1, the acetone was vacuum removed to obtain 132 parts of castor oil modified monomers.

[0065] B. Castor oil modified emulsion formula:

[0066] (1) Compound emulsifier formula:

[0067] 1 part nonionic emulsifier

[0068] Reactive emulsifier 3 parts

[0069] Prepare compound emulsifiers according to formula.

[0070] (2) Nuclear monomer pre-emulsion formula:

[0071]

[0072] Put vinyl monomers or vinyl aromatic compounds that do not contain carboxyl or hydroxyl groups, deionized water, composite emulsifiers and ini...

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Abstract

The invention relates to castor oil modified emulsion for improving edge corrosion resistance of a waterborne coating. The castor oil modified emulsion for improving the edge corrosion resistance of the waterborne coating is obtained by core-shell emulsion polymerization of core monomer pre-emulsion and shell monomer pre-emulsion, a castor oil modified monomer is added in the shell monomer pre-emulsion, and the formula of the castor oil modified monomer comprises 38.96% to 65% of castor oil, 5.96% to 22.16% of isocyanate acrylate, 23.70% to 48.90% of acetone, 0.19% to 0.65% of an organic tin catalyst, and 0.0019% to 0.0065 % of a polymerization inhibitor, and the components are condensed and vacuum removal of acetone is carried out to obtain the castor oil modified monomer. The castor oil modified emulsion for improving the edge corrosion resistance of the waterborne coating disclosed by the invention increases the reactivity of the castor oil, microgel is synthesized through a manner of the core-shell emulsion polymerization, and when the microgel is used in the waterborne coating, a triglyceride structure of the castor oil is better exposed on the surfaces of latex particles in a shell part of the emulsion, furthermore, the triglyceride structure obviously inhibits film shrinkage, and improves the edge corrosion resistance of the film in the solidification process of the film.

Description

[0001] [technical field] [0002] The invention belongs to the field of water-based paints, and relates to a castor oil modified emulsion for improving the edge anticorrosion of water-based paints. [0003] [Background technique] [0004] Metal corrosion is a major problem faced by the global industry. The annual economic losses caused by corrosion are immeasurable. The research on anti-corrosion methods and material synthesis plays an important role in the national economy. Traditional metal anti-corrosion is usually a solvent-based coating rich in zinc, chromium and other heavy metals as anti-corrosion fillers. These anti-corrosion metal materials have certain limitations in terms of environmental protection, resource utilization and cost. Most of the edge corrosion of the paint is due to the flow during the film forming process. During the crosslinking process, the corners and sharp places of the workpiece are prone to shrinkage of the paint film, which leads to the thinning...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F289/00C08F220/14C08F212/08C08F220/18C08F220/06C08F220/28C08F2/26C08F2/30C09D151/00C09D5/08
CPCC08F2/26C08F2/30C08F289/00C09D5/08C09D151/00C08F220/14
Inventor 郑子童刘薇薇林海莲方娟娟李晶田静丽王海波
Owner HAOLISEN CHEM TECH (JIANGSU) CO LTD
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