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Silicone-modified vegetable oil polymer polyether defoamer and preparation method thereof

A technology of siloxane modification and polymer polyether, which is applied in the direction of foam dispersion/prevention to achieve the effects of improving stability, improving dispersibility and broadening the scope of application

Active Publication Date: 2015-05-13
JIANGSU STERRIC CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The huge market demand has brought unprecedented development opportunities for defoamers, but as multinational companies continue to enter our country to carry out production and operation, it has also brought us severe challenges

Method used

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  • Silicone-modified vegetable oil polymer polyether defoamer and preparation method thereof
  • Silicone-modified vegetable oil polymer polyether defoamer and preparation method thereof

Examples

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Effect test

Embodiment 1

[0020] Embodiment 1: Prepare silicone modified vegetable oil polymer polyether defoamer according to the following steps

[0021] (1) Add a mixture of 1 kg epoxy soybean oil and hydroxyl-terminated silicone oil with a viscosity of 20cst (the molar ratio of epoxy group to silicone oil in soybean oil is 1:1), and 1 g of fluoroboric acid into the reactor. Stir and heat to 90°C, react for 2 hours, cool to room temperature, extract the reaction mixture with dichloromethane, and then wash the organic layer three times with saturated sodium chloride solution, after separation, the organic layer is distilled off under reduced pressure to obtain silicon Oxyalkylene modified vegetable oil polyols;

[0022] (2) Put 1 kg of the siloxane-modified vegetable oil polyol prepared in step (1) into a three-necked flask, slowly add 200 mL of 2.5 mol / L potassium hydroxide methanol solution dropwise at 60 ° C, and keep it warm for about 1 hour after the dropping is completed. Stopping the reaction...

Embodiment 2

[0024] Embodiment 2: prepare siloxane modified vegetable oil polymer polyether defoamer according to the following steps

[0025] (1) Add a mixture of 1 kg epoxy soybean oil and hydroxyl-terminated silicone oil with a viscosity of 100cst (the molar ratio of epoxy group to silicone oil in soybean oil is 1:1.1), and 1.5 g of fluoroboric acid into the reactor, under nitrogen protection Stir and heat to 95°C, react for 2 hours, cool to room temperature, extract the reaction mixture with dichloromethane, then wash the organic layer three times with saturated sodium chloride solution, and after separation, the organic layer is distilled off under reduced pressure to obtain silicon Oxyalkylene modified vegetable oil polyols;

[0026] (2) Put 1 kg of the siloxane-modified vegetable oil polyol prepared in step (1) into a three-necked flask, slowly add 300 mL of 2.5 mol / L potassium hydroxide methanol solution at 60 ° C, and keep it warm for about 1 hour after the addition is completed. ...

Embodiment 3

[0028] Embodiment 3: Prepare silicone modified vegetable oil polymer polyether defoamer according to the following steps

[0029] (1) Add a mixture of 1 kg epoxy soybean oil and hydroxyl-terminated silicone oil with a viscosity of 1000cst (the molar ratio of epoxy group to silicone oil in soybean oil is 1:1.2), and 2 g of fluoroboric acid into the reactor. Stir and heat to 100°C, react for 2 hours, cool to room temperature, extract the reaction mixture with dichloromethane, then wash the organic layer three times with saturated sodium chloride solution, and remove the solvent from the organic layer by vacuum distillation to obtain silicon Oxyalkylene modified vegetable oil polyols;

[0030] (2) Put 1 kg of the siloxane-modified vegetable oil polyol prepared in step (1) into a three-necked flask, slowly add 400 mL of 1.25 mol / L potassium hydroxide methanol solution at 60°C, and keep it warm for about 1 hour after the addition is complete. Stopping the reaction, washing the rea...

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Abstract

The invention discloses a silicone-modified vegetable oil polymer polyether defoamer and a preparation method thereof, wherein the preparation method comprises the following steps: introducing a siloxane chain into a molecular chain of vegetable oil by utilizing the reaction of epoxy vegetable oil and silicone oil, to obtain siloxane-modified vegetable oil polyols; performing transesterification on siloxane-modified vegetable oil polyols in a methanol solution of potassium hydroxide to obtain siloxane-modified vegetable oil methyl ester; the ring-opening polymerization is performed on siloxane-modified vegetable oil methyl ester, ethylene oxide and propylene oxide to obtain the silicone-modified vegetable oil polymer polyether defoamer. According to the invention, the silicone-modified vegetable oil polymer polyether defoamer solves the problems of poor hydrophilicity and low foam breaking rate of vegetable oil defoamer, is stable in emulsion properties, good in water dispersion property, no non-toxic and free of physiological activity. New ideas for the synthesis of environment-friendly defoamers are provided, and more new options for food grade defoamers are provided.

Description

technical field [0001] The invention belongs to the technical field of preparation of nonionic surfactants, and in particular relates to a silicone-modified vegetable oil macromolecular polyether defoamer and a preparation method thereof. Background technique [0002] Defoamer is an indispensable additive in the production of modern chemical industry. It is mainly used to eliminate harmful foam produced by surface active substances, stirring and other artificial or non-artificial factors in industrial production. In many industrial production processes (such as sewage treatment, printing and dyeing, fermentation, textile, food processing, oil exploration and refining, emulsion polymerization and natural gas desulfurization, etc.), the existence of a large amount of foam often causes inconvenience in operation, reduction of equipment capacity and loss of raw materials. In severe cases, it may even lead to product quality problems and cause huge economic losses. At present, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04
Inventor 凌坤华侯琳熙易思利龙金林
Owner JIANGSU STERRIC CHEM IND
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