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A mineral oil defoamer

A technology of defoaming agent and mineral oil, applied in the direction of coating, etc., can solve problems such as poor defoaming and suppressing performance, coating defects, poor coating defects, etc., to improve defoaming and suppressing performance and stability, and solve shrinkage craters Effect

Active Publication Date: 2016-06-08
JIANGSU SIXIN SCI-TECH APPL RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the defoamers used in the water-based architectural coatings industry are mainly divided into two categories: silicone and mineral oil, but silicone products are not compatible with water-based systems, and are likely to cause problems such as coating shrinkage and edge shrinkage; and mineral oil The antifoaming agent is mainly composed of mineral oil, fatty acid metal soap, fatty acid amide, fatty alcohol and polyether, and has good dispersibility in water-based system; although the compatibility is better than that of silicone defoaming agent, but in terms of antifoaming performance have certain deficiencies
[0003] Patent CN200510088437.6 introduces a paint defoamer with three different structures of hydrocarbons as the carrier, fatty acid aluminum and silicon dioxide as the main defoaming substances, but it introduces some substituents with 2 to 6 carbon atoms When alkyl modified silicone oil, it is easy to cause coating defects; CN201010584403.7 introduces a processing method of defoamer containing fatty acid aluminum and fatty acid amide; defoamer, but did not mention the poor stability and coating defects of the defoamer with silica as the defoamer component, nor did it mention the defoamer with silica and mineral oil as the main Insufficient anti-foaming ability; CN101310814 introduces a defoaming system of mineral oil and silicone grease, which improves the anti-foaming ability, but it will cause serious shrinkage cavity and edge shrinkage when it is used in water-based coatings
The document "Modification of Soybean Oil and Its Application in Defoamer" introduces that the compounding of mineral oil and soybean oil improves the stability of the defoamer system within a certain range, but fails to solve the problem of using alkyl silicone oil, hydrophobic A series of problems such as poor compatibility, poor stability, poor defoaming performance, and poor coating quality brought about by the defoaming system of silica as the active component
[0004] In addition, the past defoamers used mineral oil as the carrier, fatty acid metal soap as the main active substance, added polyether, modified polyether, silicone oil, modified silicone oil To increase its defoaming performance, but at the same time affect the appearance and quality of its coating

Method used

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  • A mineral oil defoamer
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  • A mineral oil defoamer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Mix 21g of alkyl silicone oil (the average carbon number is 1.3, and the number of carbon atoms in the group R is 10) and 2g of precipitated silica, and disperse at a high speed of 2000rpm for 10min, and raise the temperature to 100°C, keep warm After 0.5h, the mixture A was obtained, and the kinematic viscosity reached 3000mPa·s at 25°C.

[0039] Then add 317g5# white oil, 577g peanut oil and epoxidized peanut oil thereof in the container, add 9g aluminum hexadecanoate while stirring, 13g aluminum dioctoate, 23g oxidized polyethylene wax, 25g stearic acid, and above-mentioned mixture A , and then continue to stir for 15min. Immediately after slowly raising the temperature to 140°C and keeping it warm for 0.5h, then cooling down to 80°C, adding 18g of sorbitan trioleate (Span-85) and continuing to stir for 60min to obtain mixture B.

[0040]At room temperature, the mixture B was dispersed in a high-speed disperser at a speed of 3000 rpm until the size of the particles ...

Embodiment 2

[0042] Mix 96g of alkyl silicone oil (the average carbon number is 2.1, and the number of carbon atoms in the group R is 14) and 45g of precipitated silica, and disperse at a high speed of 2000rpm for 10min, and raise the temperature to 160°C, keep warm Mixture A was obtained in 2h, and the kinematic viscosity reached 4000mPa·s at 25°C.

[0043] Then add 127g7# white oil, 673g soybean oil and its amidated soybean oil in container, add 30g bis(docosanoate) aluminum while stirring, 0.5g polyoxypropylene glycol, 0.5g n-stearyl alcohol, With the above mixture A, and then continue to stir for 10min. Immediately after slowly raising the temperature to 180°C and keeping it warm for 3h, then cooling down to 80°C, adding 28g of polyoxyethylene sorbitan trioleate (Tween-85) and continuing to stir for 60min to obtain mixture B.

[0044] At room temperature, the mixture B was dispersed in a high-speed disperser at a speed of 3000 rpm until the size of the particles was in the range of 5-...

Embodiment 3

[0046] Mix 11g of alkyl silicone oil (the average carbon number is 4.1, and the number of carbon atoms in the group R is 18) and 4g of precipitated silica, and disperse at a high speed of 2000rpm for 10min, and raise the temperature to 130°C, keep warm Mixture A was obtained in 1.2h, and the kinematic viscosity reached 5000mPa·s at 25°C.

[0047] Then add 170 alkylbenzenes, 630g castor oil and epoxidized castor oil thereof in the container, add 20g aluminum di(octadecanoate) while stirring, 15g isobutyl phosphate, 10g ethylene glycol diester stearate , and the above mixture A, and then continue to stir for 30min. Immediately after slowly raising the temperature to 140°C and keeping it warm for 3h, then cooling down to 60°C, adding 140g of oleic acid polyoxyethylene (6) ether, and continuing to stir for 60min to obtain mixture B.

[0048] At room temperature, the mixture B was dispersed in a high-speed disperser at a speed of 3000 rpm until the size of the particles ranged fro...

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Abstract

The invention relates to a mineral oil defoaming agent. Vegetable oil and derivatives thereof as well as mineral oil are introduced into a system of alkyl silicone oil and silicon dioxide, and by controlling the average number of carbon atoms in the alkyl silicone oil and controlling the ration of mineral oil to the vegetable oil and derivatives thereof to be between 1:6 and 4:7, the vegetable oil and derivatives thereof and mineral oil are well mutually soluble so that the problems of shrinkage cavity, shrinkage side and indentation of a film are ultimately and effectively solved and meanwhile the anti-foaming and defoaming properties and stability of the defoaming agent are also improved.

Description

technical field [0001] The present invention relates to a defoamer. More specifically, it relates to a defoamer suitable for water-based architectural coatings. Background technique [0002] As a kind of fine chemicals, defoamers are widely used in various industries. The use of defoamers not only needs to meet their own stability and good antifoaming performance, but also has a good compatibility with the foaming system. Capacitance. At present, the defoamers used in the water-based architectural coatings industry are mainly divided into two categories: silicone and mineral oil, but silicone products are not compatible with water-based systems, and are likely to cause problems such as coating shrinkage and edge shrinkage; and mineral oil The antifoaming agent is mainly composed of mineral oil, fatty acid metal soap, fatty acid amide, fatty alcohol and polyether, and has good dispersibility in water-based system; although the compatibility is better than that of silicone d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D7/12
CPCC09D7/61C09D7/63C09D7/65
Inventor 张振张钟元曹添吴飞
Owner JIANGSU SIXIN SCI-TECH APPL RES INST CO LTD
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