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Gemini organic silicon defoamer

An organosilicon defoamer and twin-type technology, applied in the direction of foam dispersion/prevention, etc., can solve the problem of inability to adapt to the foaming system, and achieve the effect of good foam suppression performance, good foam suppression effect and good defoaming activity.

Active Publication Date: 2017-07-25
福建昆冈化学助剂科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the current papermaking technology is constantly improving and the water temperature of white water is also on the rise, due to the vast territory of our country and the large climate difference between the north and the south, in winter, the existing defoamers cannot adapt to the foaming system at low temperatures. The invention aims to provide a silicone defoamer for low temperature in the paper industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation method of described gemini type organosilicon defoamer, comprises the following steps:

[0023] .Add 1.5g of sodium hydroxide into the autoclave, then add 58g of initiator propylene 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.

[0024] Put 100g of low-hydrogen silicone oil UC11 and 96g ...

Embodiment 2

[0029] The preparation method of described gemini type organosilicon defoamer, comprises the following steps:

[0030] a. Add 1.5g of sodium hydroxide into the autoclave, then add 58g of initiator propylene 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.

[0031]Put 100g of low-hydrogen silicone oil uc12 and 88g of the above...

Embodiment 3

[0036] The preparation method of described gemini type organosilicon defoamer, comprises the following steps:

[0037] a. Add 1.5g of sodium hydroxide into the autoclave, then add 58g of initiator propylene 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 of EO and 168g of PO in the storage tank, press in about 50g 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.

[0038] b. Vacuum distill 100g of low-hydrogen silic...

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Abstract

The invention relates to a gemini organic silicon defoamer. The gemini organic silicon defoamer is of an improved polyether organosilicon diamide sulfonate structure; hydrophilic groups are ethylene oxide, an amido bond and sulfonate; hydrophobic groups are polysiloxane and epoxypropane; through a plurality of hydrophilic groups, the low-temperature defoaming affect is good; through a comb structure, polyether-modified silicone oil can quickly spread on a gas-liquid interface of a foaming system, and locally intrudes to break foam, and the gemini organic silicon defoamer has better defoaming activity; through a macromolecular comb structure, the dissolution rate in a system is reduced and a continuous foam inhibition effect is generated. The gemini organic silicon defoamer is a silicone-modified defoamer which is good in defoaming and foam inhibiting properties, especially good in low-temperature defoaming and foam inhibiting effects.

Description

technical field [0001] The invention relates to a gemini type organic silicon defoamer and a preparation method thereof. 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. 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 conducive to accurate measurement, environmental pollution, and accidents are caused. In short, the existence of bubbles affects all sectors and aspects of the national economy. If they cannot be resolved properly, it is no exaggeration to say that "bubbles" will become our roadblock and become a "bottleneck" in certain processes. [0003] Although the current papermaking technology is constantly improving and the water temperature of white water is also on the rise...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/36C08F8/32C08F290/06C08F220/06C08G77/46C08G65/28B01D19/04
Inventor 齐文刚陈晓明齐金梅
Owner 福建昆冈化学助剂科技有限公司
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