Organic silicon-modified polyether ester emulsion defoamer and preparation method thereof

A polyether ester and silicone technology, applied in the field of non-ionic surfactant preparation, can solve problems such as product residue, environmental pollution, and impact on workers' health, and achieve excellent anti-foaming performance, good dispersibility and stability

Inactive Publication Date: 2016-02-03
泉州市福达科技咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with foreign countries, there is still a certain gap in the research of such defoamers in my country, and there are still many deficiencies in terms of grade, type and quantity.
Moreover, in the preparation process, in order to prevent the crosslinking of Si-H bonds, benzene organic solvents will be added, which will not only pollute the environment and affect the health of workers, but also cause residues in the product, which will cause trouble for subsequent use

Method used

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  • Organic silicon-modified polyether ester emulsion defoamer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Add 500g of hydrogen-containing silicone oil with a molar ratio of 1:10 and a hydrogen content of 1.0%, self-made polyoxypropylene polyoxyethylene pentaerythritol ether stearate, and 2g of trifluoroacetic acid to a mixer equipped with a thermometer and agitator. In a four-neck flask with a nitrogen gas guide tube and a condenser, start the stirrer, raise the temperature to 100° C. under a nitrogen atmosphere and keep the temperature for 10 hours. After the reaction, cool to obtain a silicone-modified polyether ester.

[0029] (2) Add 14g of Viscoatex46 into 521.5mL of water, stir for 5 minutes until uniform, adjust the pH to 8 with 10% NaOH solution, and set aside.

[0030] (3) Add 140 g of the silicone-modified polyether ester prepared in step (1), and 24.5 g of Span-80 and Tween-80 composite emulsifiers with an HLB value of 8 into a round-bottomed flask equipped with stirring, and heat to 70°C , after stirring evenly at high speed, stop heating, then quickly add 2...

Embodiment 2

[0032] (1) Add 500g of hydrogen-containing silicone oil with a hydrogen content of 1.0% in a molar ratio of 1:15, self-made polyoxypropylene polyoxyethylene pentaerythritol ether stearate and 1g of trifluoroacetic acid in a mass fraction to a thermometer equipped with , a stirrer, a nitrogen air pipe and a four-necked flask with a condenser, start the stirrer, raise the temperature to 110° C. under a nitrogen atmosphere and keep it warm for 8 hours. After the reaction, cool to obtain a silicone-modified polyether ester.

[0033] (2) Add 7g of Viscoatex46 into 453mL of water, stir for 3 minutes until uniform, adjust the pH to 7 with 10% NaOH solution, and set aside.

[0034] (3) Add 210g of the silicone-modified polyetherester prepared in step (1) and 30g of Span-80 and Tween-80 composite emulsifiers with an HLB value of 9.5 into a round-bottomed flask equipped with stirring, and heat to 60°C. After stirring evenly at a high speed, stop heating, then quickly add 200g of thicken...

Embodiment 3

[0036] (1) Add 500g of hydrogen-containing silicone oil with a hydrogen content of 1.2% in a molar ratio of 1:10, self-made polyoxypropylene polyoxyethylene pentaerythritol ether stearate, and a mass fraction of 2g of trifluoroacetic acid to a thermometer equipped with , a stirrer, a nitrogen air pipe and a four-necked flask with a condenser, start the stirrer, raise the temperature to 110° C. under a nitrogen atmosphere and keep it warm for 8 hours. After the reaction, cool to obtain a silicone-modified polyether ester.

[0037] (2) Add 14g of sodium carboxymethylcellulose into 446mL of water, stir for 3 minutes until uniform, adjust the pH to 7 with 10% NaOH solution, and set aside.

[0038] (3) Add 210 g of silicone-modified polyether ester prepared in step (1), and 30 g of Span-80, Tween-80, and AEO-3 composite emulsifiers with an HLB value of 8.5 into a round-bottomed flask equipped with stirring, and heat After stirring at a high speed to 60°C, stop heating, then quickly...

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Abstract

The invention discloses an organic silicon-modified polyether ester emulsion defoamer and a preparation method thereof. The organic silicon-modified polyether ester emulsion defoamer is obtained by enabling home-made polyoxypropylene polyoxyethylene pentaerythrilol ether fatty acid ester and hydrogen-containing silicone oil to react under the action of a catalyst to obtain an organic silicon-modified polyether ester, and then emulsifying the organic silicon-modified polyether ester by utilizing a compound emulsifier. A solvent-free process is adopted in the preparation process of the organic silicon-modified polyether ester, so that the preparation process is clean and environment-friendly. The defoamer prepared by emulsification has the characteristics of polysiloxane and polyether defoamers, has excellent defoaming and foam-suppressing properties, is free of delamination or floating oil and high in stability, and has a good application effect in a water-based defoaming system.

Description

technical field [0001] The invention belongs to the technical field of preparation of nonionic surfactants, and in particular relates to an organosilicon-modified polyether ester emulsion defoamer and a preparation method thereof. Background technique [0002] In most industrial production processes, such as printing and dyeing, fermentation, papermaking, coatings, and oil exploration, a large amount of foam is often produced. The existence of too much foam will bring many adverse effects to production. Adding defoamers has been proven It is the most effective and economical method to eliminate harmful foam. [0003] At present, there are many types of defoamers on the market, such as polyethers, organopolysiloxanes, fatty acids, lipids, and composites. Among them, the polyether modified organopolysiloxane defoamer is unique, mainly because it not only has the low surface tension of the polysiloxane defoamer, strong defoaming effect, good stability, non-toxic and pollution-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04C08G81/00
Inventor 林淑卿
Owner 泉州市福达科技咨询有限公司
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