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A kind of 4-amino-2-hydroxybenzoic acid sodium synergistic polysiloxane defoamer

A technology of sodium hydroxybenzoate and phenylmethyl polysiloxane, which is applied in the direction of foam dispersion/prevention, chemical instruments and methods, liquid degassing, etc., and can solve the problem of large amount of polysiloxanes used and raw material components Complicated problems, to achieve low cost, high economic and ecological benefits, and improve high temperature resistance

Active Publication Date: 2018-07-27
江门市冠达化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when preparing polysiloxane defoamers, it is usually necessary to add four basic components: active ingredient polysiloxane, emulsifier, carrier and thickener. The raw material components are more complex and polysiloxane heavy substance use

Method used

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  • A kind of 4-amino-2-hydroxybenzoic acid sodium synergistic polysiloxane defoamer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A 4-amino-2-hydroxybenzoate sodium synergistic polysiloxane defoamer, based on a total of 100 parts by weight, consists of the following parts by weight:

[0029] Polyborosiloxane: 0.1 part; Sodium 4-amino-2-hydroxybenzoate: 0.01 part;

[0030] Phenylmethyl polysiloxane: 0.6 parts; 4-methyl-2-hexanol: 10 parts;

[0031] Water: balance.

[0032] The preparation method of described defoamer is:

[0033] Add sodium 4-amino-2-hydroxybenzoate and higher aliphatic alcohol to a part of the solvent, heat up to 40°C, heat and stir for 1 minute;

[0034] Then slowly add polyborosiloxane under stirring, heat up to 60°C and then keep stirring for 3 minutes;

[0035] Continue to slowly add phenylmethyl polysiloxane under stirring, heat up to 70°C, and keep stirring for 10 minutes;

[0036] Finally, add the remaining solvent and stir slowly and cool down to room temperature to obtain a defoamer.

Embodiment 2

[0038] A 4-amino-2-hydroxybenzoate sodium synergistic polysiloxane defoamer, based on a total of 100 parts by weight, consists of the following parts by weight:

[0039] Polyborosiloxane: 1 part; Sodium 4-amino-2-hydroxybenzoate: 10 parts;

[0040] Phenylmethyl polysiloxane: 1 part; 3-heptanol: 10 parts;

[0041] Isomerized tridecanol: 15 parts; water: balance.

[0042] The preparation method of described defoamer is:

[0043] Add sodium 4-amino-2-hydroxybenzoate and higher aliphatic alcohol to a part of the solvent, heat up to 50°C, heat and stir for 2 minutes;

[0044] Then slowly add polyborosiloxane under the action of stirring, heat up to 65°C, and then heat and stir for 5 minutes;

[0045] Continue to slowly add phenylmethylpolysiloxane under stirring, heat up to 75°C, and keep stirring for 20 minutes;

[0046] Finally, add the remaining solvent and stir slowly and cool down to room temperature to obtain a defoamer.

Embodiment 3

[0048] A 4-amino-2-hydroxybenzoate sodium synergistic polysiloxane defoamer, based on a total of 100 parts by weight, consists of the following parts by weight:

[0049] Polyborosiloxane: 0.2 part; Sodium 4-amino-2-hydroxybenzoate: 1 part;

[0050] Phenylmethyl polysiloxane: 0.6 parts; 4-methyl-2-hexanol: 5 parts;

[0051] 3-heptanol: 5 parts; isomeric tridecanol: 5 parts; 2-hexyldecanol: 5 parts;

[0052] Myristyl alcohol: 5 parts; water: the balance.

[0053] The preparation method of described defoamer is:

[0054] Add sodium 4-amino-2-hydroxybenzoate and higher aliphatic alcohol to a part of the solvent, heat up to 40°C, heat and stir for 1 minute;

[0055] Then slowly add polyborosiloxane under stirring, heat up to 60°C and then keep stirring for 3 minutes;

[0056] Continue to slowly add phenylmethyl polysiloxane under stirring, heat up to 75°C, and keep stirring for 10 minutes;

[0057] Finally, add the remaining solvent and stir slowly and cool down to room temper...

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Abstract

The invention belongs to the technical field of textile assistants, and discloses a 4-amino-2-sodium hydroxybenzoate synergistic polysiloxane defoaming agent. The 4-amino-2-sodium hydroxybenzoate synergistic polysiloxane defoaming agent is prepared from the following components based on 100 parts by weight: 0.1 to 1 part of polyborosiloxane, 0.01 to 10 parts of 4-amino-2-sodium hydroxybenzoate, 0.6 to 1 part of phenyl methicone, 10 to 25 parts of higher aliphatic alcohol and the balance of a solvent. By the adding of 4-amino-2-sodium hydroxybenzoate synergistic polysiloxane serving as the physical and chemical property of the defoaming agent, extremely good foam distinction and inhibition effects can be achieved with the extremely small amount of the defoaming agent, and the adding amount of polysiloxane is obviously reduced; furthermore, the stability of the defoaming agent is improved, and the storage effective period of the polysiloxane defoaming agent is prolonged; the resistance to high temperature, the resistance to acid and alkali and the resistance to shearing of the synergistic polysiloxane can be further improved.

Description

Technical field: [0001] The invention relates to the technical field of textile auxiliaries, in particular to a 4-amino-2-hydroxybenzoate sodium synergistic polysiloxane defoamer. Background technique: [0002] The surfactant is adsorbed on the gas-liquid interface, causing the surface tension of the liquid surface to decrease, thereby increasing the gas-liquid contact surface, so that the bubbles are not easy to merge. The relative density of the bubbles is much smaller than that of the liquid itself. When the rising bubbles pass through the liquid surface, they absorb a layer of surfactant molecules on the liquid surface. Therefore, the bubble film with adsorbed surfactant exposed in the air is different from the bubble film in the solution. It contains two layers of surfactant molecules to form a bimolecular film, and the adsorbed surfactant has protection for the liquid film. effect. The defoamer is to destroy and inhibit the formation of this film. The defoamer enters...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D19/04
CPCB01D19/0409
Inventor 付淑珍
Owner 江门市冠达化工科技有限公司
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