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Polyether modified organic silicon defoamer, and preparation method and application thereof

A polyether modification, silicone oil technology, applied in the direction of foam dispersion/prevention, can solve the problems of demulsification and bleaching oil, poor foam suppression ability and incomplete emulsification of dimethicone defoamer, and achieve stable emulsification properties. , The effect of increasing emulsion stability and good defoaming activity

Active Publication Date: 2014-05-28
威尔(福建)生物有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Traditional simethicone oil has high defoaming performance, but it is prone to demulsification and floating oil phenomenon due to incomplete emulsification in high-temperature white water, and the antifoaming ability of simethicone oil defoamer is poor

Method used

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  • Polyether modified organic silicon defoamer, and preparation method and application thereof
  • Polyether modified organic silicon defoamer, and preparation method and application thereof
  • Polyether modified organic silicon defoamer, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Add 1.5g of sodium hydroxide into the autoclave, then add 58g of initiator propenyl alcohol, and quickly press the lid of the autoclave. Vacuum at room temperature to make the reaction initial pressure reach -0.1 MPa. Press in about 50 g of EO through the ethylene oxide (EO) storage tank, turn on the stirring and heating device, and heat up the reaction. After the reaction is stable, add the remaining EO in batches, 30-40 g each time, the total amount added is 220 g, and then PO (propylene oxide) is added, 30-35 g each time, the total amount added is 112 g, and the reaction temperature is maintained at 120°C. After the reaction was complete, the temperature was lowered to 100°C. After adding the materials, perform the aging reaction until the pressure in the kettle returns to -0.1MPa, and then cool and discharge to obtain allyl alcohol polyether.

Embodiment 2

[0046] Add 1.5g of sodium hydroxide into the autoclave, then add 58g of initiator propenyl alcohol, and quickly press the lid of the autoclave. Vacuum at room temperature to make the reaction initial pressure reach -0.1 MPa. Press in about 80 g of EO through the ethylene oxide (EO) storage tank, turn on the stirring and heating device, and heat up the reaction. After the reaction is stable, add the remaining EO in batches, 40-50 g each time, the total amount added is 308 g, and the reaction temperature is maintained at 110-125 °C. After the EO reaction is complete, lower the temperature to 105-110 °C. After the feeding is completed, the aging reaction is carried out until the pressure in the kettle returns to -0.1 MPa, and the allyl alcohol polyether is obtained by cooling and discharging.

[0047] Put 100g of low-hydrogen silicone oil uc12 and 88g of the above allyl alcohol polyether in a 250 mL four-necked flask with a thermometer and an electric stirrer, vacuum distill un...

Embodiment 3

[0050] Add 1.5g of sodium hydroxide into the autoclave, then add 58g of initiator propenyl alcohol, and quickly press the lid of the autoclave. Vacuum at room temperature to make the reaction initial pressure reach -0.1 MPa. Mix 396g EO and 168g PO in the storage tank, press in about 50 g of EO / PO through the storage tank, turn on the stirring and heating device, and raise the temperature to react. After the reaction is stable, the remaining EO / PO is added in batches, 30-40 g each time, and the reaction temperature is maintained at about 115°C. After the reaction was complete, the temperature was lowered to 105°C. After the feeding is completed, the aging reaction is carried out until the pressure in the kettle returns to -0.1 MPa, and the allyl alcohol polyether is obtained by cooling and discharging.

[0051] Put 100g of low-hydrogen silicone oil uc11 and 96g of the above-mentioned allyl alcohol polyether in a 250 mL four-necked flask with a thermometer and an electric sti...

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Abstract

The invention belongs to the technical field of chemical engineering, and discloses polyether modified organic silicone oil that adopts a comb structure shown in formula (1) and a preparation method and application as a defoamer, and overcomes the service restrictions of conventional organic silicone defoamers. The preparation method comprises the following steps: compounds such as short polyols polydimethyl siloxane or polymethyl phenyl siloxane in which end groups are hydrogen, allyl alcohol polyether, aliphatic esters or alkanes amides that contain end alkenyl are selected as raw materials to synthesize the polyether modified organic silicone oil. According to the invention, as a defoamer, the polyether modified organic silicone oil has good characteristics of self-emulsifying property, self-dispersing property, steady emulsifying property, good defoaming and foam inhibiting performance, high temperature resistance, and acid and alkali resistance.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and relates to a polyether modified silicone defoamer and its preparation method and application. More specifically, the invention relates to a self-emulsifying comb structure polyether modified silicone defoamer. Foaming agent and its preparation method and use. Background technique [0002] Defoamer, also known as antifoaming agent, will produce many harmful foams in the process of industrial production, and it is necessary to add a defoamer. Defoamers are currently widely used to remove harmful foam generated in the production process of latex, textile sizing, food fermentation, biomedicine, paint, petrochemical, papermaking, industrial cleaning and other industries. The hazards caused by these foams mainly include: production capacity is greatly restricted, waste of raw materials and products is caused, the reaction cycle is prolonged, product quality is affected, it is not conduci...

Claims

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Application Information

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IPC IPC(8): C08F290/06C08G77/46C08G65/28B01D19/04
Inventor 齐文刚许贤黄继富
Owner 威尔(福建)生物有限公司
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