Non-silicon defoaming agent and preparation method thereof

A non-silicon defoamer and defoamer technology, applied in the field of non-silicon defoamer and its preparation, can solve the problem that product stability, defoaming performance and compatibility cannot be guaranteed at the same time, which affects the performance of the foaming system , needs to be further improved, etc.

Active Publication Date: 2018-11-13
JIANGSU SIXIN SCI-TECH APPL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silicone defoamers have the characteristics of less addition, low surface tension, no physiological activity, and high safety. However, in some cases, low surface tension and good spreading properties have become the shortcomings of silicone defoamers. It is because once the silicone is demulsified, it is easy to form silicon spots on the surface or cause pump blockage, which directly affects the performance of the foaming system; non-organic silicon defoamers mainly include polyether defoamers and mineral oil defoamers , compared with silicone defoamers, these two defoamers have excellent compatibility with industrial additives and do not affect the stability of the foaming system
However, polyether defoamers and mineral oil defoamers have certain deficiencies in defoaming and antifoaming properties, and the price of polyether defoamers is relatively high. At the same time, the VOC (volatile organic compounds) of some polyether defoamers Compound) content will bring adverse effects on environmental protection. Similarly, the currently commonly used mineral oil defoamers mostly use base oil extracted from petroleum by physical distillation as the entire carrier or part, and there are also VOC excessive High problem, will bring harm to the environment
[0004] CN104479439B introduces vegetable oil and its derivatives and mineral oil in the system of alkyl silicone oil and silicon dioxide, so that it is well miscible with mineral oil by controlling the average carbon number of alkyl silicone oil, and mineral oil and vegetable oil The ratio of its derivatives is controlled between 1:6 and 4:7, which finally effectively solves the problems of shrinkage, edge shrinkage and depression of the coating film, and also improves the defoaming and antifoaming performance and stability of the defoamer but did not discuss the stability of the system and the anti-foaming performance of the simple vegetable oil and its derivatives as the carrier, the VOC content of the product is still relatively high; in CN101991975B, mineral oil is used as the carrier, and fatty acid metal

Method used

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  • Non-silicon defoaming agent and preparation method thereof
  • Non-silicon defoaming agent and preparation method thereof
  • Non-silicon defoaming agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Combine 18 parts of peanut oil, 0.1 part of hydrophobic silica (with a specific surface area of ​​50m 2 / g) Disperse in a high-speed disperser at a speed of 1500 rpm for 20 minutes at a high speed, raise the temperature to 160° C., and keep it warm for 0.5 hours to obtain a mixture G1.

[0030] 2. Mix 13.5 parts of epoxy peanut oil, 2 parts of castor oil polyoxyethylene polyoxypropylene ether oleate (a+b+c is 0, d+e+f is 20, and both R groups are -OC (CH 2 )CH=CH(CH 2 )CH 3 ), 0.1 part of polyamide-modified hydrogenated castor oil were dispersed in a high-speed disperser at 2000 rpm at high speed and heated to 50° C., kept for 0.5 h to obtain mixture H1.

[0031]3. Put the mixture G1, 18 parts of epoxidized peanut oil, 0.1 part of hydrogenated castor oil, and 1.7 parts of aluminum stearate into the container and start stirring. Stir at room temperature for 30 minutes to disperse the system evenly, and then slowly heat up to 180°C. And keep it warm for 0.5h; after...

Embodiment 2

[0034] 1. First mix 7 parts of linseed oil, 5 parts of hydrophobic silica (with a specific surface area of ​​200m 2 / g) Disperse in a high-speed disperser at 2500 rpm for 20 minutes at a high speed, and raise the temperature to 100° C., and keep it warm for 2 hours to obtain the mixture G2.

[0035] 2. Mix 14 parts of epoxy linseed oil, 10 parts of castor oil polyoxyethylene polyoxypropylene ether oleate (a+b+c is 40, d+f+e is 0, and only R group is —OC( CH 2 )CH=CH(CH 2 )CH 3 ), 1.5 parts of polyamide-modified hydrogenated castor oil were dispersed in a high-speed dispersant at 1000 rpm at a high speed, and the temperature was raised to 40° C., and kept for 1 hour to obtain a mixture H2.

[0036] 3. Put the mixture G2, 21 parts of linseed oil, 3.5 parts of polyamide-modified hydrogenated castor oil, and 5 parts of magnesium stearate into the container and start stirring. Stir at room temperature for 10 minutes to disperse the system evenly, and then slowly heat up to 140°C...

Embodiment 3

[0039] 1. First, 17 parts of rapeseed oil, 1.8 parts of hydrophobic silica (specific surface area of ​​100m 2 / g) Disperse in a high-speed disperser at 2000 rpm for 15 minutes at a high speed, raise the temperature to 130° C., and keep it warm for 1 hour to obtain mixture G3.

[0040] 2. Mix 8.5 parts of soybean oil, 3 parts of polyoxyethylene polyoxypropylene ether oleate (d+e+f is 10, a+b+c is 20, and only the R group is -OC(CH 2 )CH=CH(CH 2 )CH 3 ), 0.04 parts of hydrogenated castor oil were dispersed in a high-speed dispersant at 1500 rpm at a high speed, and the temperature was raised to 45° C., and kept for 0.8 h to obtain a mixture H3.

[0041] 3. Put the mixture G3, 21.25 parts of rapeseed oil, 0.06 parts of hydrogenated castor oil, and 0.1 part of calcium stearate into the container and start stirring. Stir at room temperature for 20 minutes to disperse the system evenly, and then slowly heat up to 160°C. And keep it warm for 2 hours; after the heat preservation is...

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Abstract

The invention provides a non-silicon defoaming agent and a preparation method thereof. In the prior art, vegetable oil and derivatives thereof are used as a carrier, white carbon black and fatty acidmetal soap are used as main defoaming substances of a defoaming agent, and layering of the defoaming agent can be caused even the fatty acid metal soap has very good anti-foaming performance since thefatty acid metal soap cannot swell in the vegetable oil and the derivatives thereof and exists in a granule form; in order the solve the problem, a hydrogenated castor oil substance is introduced inthe non-silicon defoaming agent, and through a specific technology, the stability of a product is ensured while the anti-foaming performance is ensured; on the other hand, through the specific technology, the hydrogenated castor oil substance is introduced twice, and the anti-foaming performance of the product is further increased by utilizing the characteristic of 'thickening' of the hydrogenatedcastor oil substance; in order to enable the hydrogenated castor oil substance in 'thickening' and a using system to have good compatibility, castor oil polyoxyethylene-polyoxypropylene ether oleatein a specific structure is introduced, and good compatibility of the product is ensured.

Description

technical field [0001] The invention relates to a non-silicon defoamer and a preparation method thereof. The defoamer belongs to fine chemical additives. Therefore, the invention belongs to the technical field of fine chemicals. technical background [0002] Defoamer is a kind of fine chemical additive. The use of defoamer not only needs to meet its own stability and good antifoaming performance. In coatings, adhesives, inks, metalworking fluids and other industries, defoamers It needs to have good compatibility with the foaming system at the same time, and will not bring adverse effects to the foaming system. In recent years, with the continuous attention of governments at all levels to environmental protection, defoamers, as a chemical additive, need more Only with good environmental protection performance can it meet the increasingly stringent market requirements. [0003] From the key components of defoaming, it is mainly divided into silicone defoaming agent and non-or...

Claims

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Application Information

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IPC IPC(8): B01D19/04
CPCB01D19/0404B01D19/0409B01D19/0413
Inventor 陈玉娟张振刘杨曹添黄伟安东尼.K.达西陈劲
Owner JIANGSU SIXIN SCI-TECH APPL RES INST CO LTD
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