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Method for improving foam suppression performance of organosilicone emulsion

A technology of silicone emulsion and polyorganosiloxane, which is applied in the direction of foam dispersion/prevention

Active Publication Date: 2012-10-10
JIANGSU SIXIN SCI-TECH APPL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of hydrophilic surfactants is that the foaming ability is relatively strong. From the microscopic structure, it is adsorbed on the bubble film to stabilize the foam, and this is precisely what is taboo in defoamers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] First, the 21g Me 3 SiO(Si Me HO) 4 (Si Me 2 O) 22 Si Me 3 and 78g CH 2 =CHCH 2 O(EO) 3 (PO) 15 Mix H and heat up to 90°C and maintain the temperature. After adding 0.05g of chloroplatinic acid isopropanol solution, continue to heat up to 120°C and react for 3 hours; then add 1g of2 / g fumed silica, mixed at 100°C for 0.5h to obtain colorless and translucent modified silicon polyether C1.

Embodiment 2

[0047] First, 45g H Me 2 SiO(Si Me HO) 50 (Si Me 2 O) 86 Si Me 2 H and 53g CH 2 =CHCH 2 CH 2 O(EO) 26 (PO) 75 Mix H and heat up to 90°C and maintain the temperature. After adding 0.08g of chloroplatinic acid isopropanol solution, continue to heat up to 150°C and react for 1h; then add 2g of 2 / g precipitated white carbon black, mixed at 130°C for 0.2h to obtain colorless and translucent modified silicon polyether C2.

Embodiment 3

[0049] First, 58g H 2 Me SiO(Si Me HO) 122 (Si Me 2 O) 241 Si Me h 2 and 39.5g CH 2 =CHCH 2 O(EO) 43 (PO) 2 Mix H and heat up to 80°C and maintain the temperature, add 0.12g isopropanol solution of chloroplatinic acid and continue to heat up to 100°C, react for 2.5h; then add 2.5g 2 / g fumed silica, mixed at 120°C for 0.8h to obtain colorless and translucent modified silicon polyether C3.

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Abstract

The invention discloses a method for improving the foam suppression performance of organosilicone emulsion. The method is characterized by comprising the following steps: adding hydrophilic white carbon black into silicon polyester during preparation; and uniformly dispersing the hydrophilic white carbon black into the silicon polyester through chemical reaction, wherein the viscosity of the silicon polyester is increased, and the surface tension of the partial region of a bimolecular membrane layer of the silicon polyester is unstable because of solid particles, so that the bimolecular membrane layer is cracked; and therefore, the foaming capacity of the silicon polyester is reduced. The stability and foam suppression performance of an organosilicone emulsion defoamer prepared by the modified silicon polyester are remarkably improved.

Description

technical field [0001] The present invention relates to a method for improving the antifoaming performance of silicone emulsion. More precisely, the present invention utilizes the surface hydroxyl groups of hydrophilic silica to form hydrogen bonds on silicon polyether to increase viscosity, and at the same time reduce the silicon polyether The foaming ability, the stability and the anti-foaming performance of the organosilicon defoamer prepared by using the treated silicon polyether are obviously improved. The defoamer belongs to the additive of fine chemicals, therefore, the present invention belongs to the technical field of fine chemicals. Background technique [0002] Silicon polyether is prepared from polyether modified silicone, and has important applications in many industries of the national economy. Acts as emulsifier and dispersant in defoamer. [0003] Silicone defoamer is a silicon-containing surfactant. As a silicone defoamer, its application fields are also ...

Claims

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Application Information

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IPC IPC(8): B01D19/04
Inventor 吴飞黄伟许勇曹添
Owner JIANGSU SIXIN SCI-TECH APPL RES INST CO LTD
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