High-stability silicon rubber latex or emulsion and preparation method thereof

A high-stability, silicone rubber technology, applied in the field of new organic silicon chemical materials, can solve the problems of unsustainable slippery feeling, loss of slippery feeling, unstable emulsion stabilization effect, etc., and achieve the effect of increasing the viscosity of the internal phase and having a wide range of applications

Active Publication Date: 2013-03-20
HUAIAN KAIYUE TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the mechanical emulsification method mostly uses thickeners and emulsifiers to achieve short-term stabilization. Once such an emulsion is diluted, the emulsion will quickly become unstable due to the loss of the stabilizing effect of the thickener, and oil floating or separation will occur. layer phenomenon, resulting in silicon spots or even unapplicable when applied. Most of such emulsions are only suitable for thick shampoos or creams and other systems that require thickness; emulsion polymerization can achieve no need for thickening A thin and stable emulsion can be prepared with a single solvent, and its dilution stability is also ideal. The most classic example is to use dodecylbenzenesulfonic acid as a catalyst and emulsifier to initiate the organosilicon ring (D4 or DMC) in water Carry out emulsion polymerization, then carry out telomerization, after t

Method used

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  • High-stability silicon rubber latex or emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] At room temperature, add 2910g D4 (octamethylcyclotetrasiloxane) and 90g dodecylbenzenesulfonic acid into a 5000ml heatable stainless steel or glass reaction vessel with stirring, stir and heat to 60~120℃, Keep stirring within this temperature range for 1~2 hours, then stop heating and stirring, and leave it at room temperature for 48 hours to obtain a viscosity (25°C) of 10 6 ~10 7 Mpa.s high viscosity silicone rubber and dodecylbenzenesulfonic acid mixture. Transfer the high-viscosity silicone rubber and dodecylbenzenesulfonic acid mixture prepared above into a 5000ml kneader or a planetary mixer, add 300g triethanolamine dodecylbenzenesulfonate, 600g deionized water or distilled water under stirring, and mix for 30 After ~60min, add triethanolamine dropwise (or flow-feed) to the mixture at a uniform speed within 60~90 minutes, stir while adding dropwise, stop dropping when the pH value of the mixture is 7~8, and continue stirring for no less than 2 hours Stop stir...

Embodiment 2

[0026] Same as Example 1, except that 2910 g of D4 (octamethylcyclotetrasiloxane) is changed to DMC (hexamethylcyclotetrasiloxane, octamethylcyclotetrasiloxane, decamethyl Cyclopentasiloxane mixture) 2850g, 90g of dodecylbenzenesulfonic acid was changed to 150g, standing for 48h was changed to standing for 120h, dodecylbenzenesulfonic acid triethanolamine was changed from 150g to 450g, and isomerized deca 150g of triol polyoxyethylene (5) ether, 150g of isomeric tridecyl alcohol polyoxyethylene (10) ether, 600g of deionized water or distilled water was changed to 900g, and the other was unchanged, 4725g of gelatinous semi-solid content of 81% was obtained. Transparent water-in-oil type high-viscosity silicone rubber latex or emulsion invention A2;

[0027] Take 1000g of this invention A2, add appropriate amount of deionized water or distilled water and stir it evenly with a strong mixer, make it phase inversion into milky white oil-in-water emulsion with a solid content of 50%...

Embodiment 3

[0030] With embodiment 1, just change D4 into 2880g, dodecylbenzenesulfonic acid is changed into 120g, after dodecylbenzenesulfonate triethanolamine 150g is changed into 360g, then add isomerism tridecyl alcohol polyoxyethylene ( 5) Ether 180g, isotridecyl alcohol polyoxyethylene (10) ether 180g, and deionized water or distilled water 600g was changed to 750g, and other things remained unchanged, to obtain 4620g of gel-like transparent water-in-oil type high Viscosity Silicone Rubber Latex or Emulsion Invention A3;

[0031] Take 1000g of the invention A3, add an appropriate amount of deionized water or distilled water therein and stir it evenly with a strong mixer to make it phase invert into a milky white oil-in-water emulsion with a solid content of 50%, which is recorded as the invention A350; take an appropriate amount of A350 with water (this It can be dilute directly with tap water) to a solid content of 1% and shake well to record as the diluted invention A301.

[0032] ...

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Abstract

The invention discloses high-stability silicon rubber latex or emulsion. The latex or emulsion comprises 40-75wt% of high-viscosity silicon rubber, 10-25wt% of emulsifier and 15-50wt% of water. The solid content of the high-stability silicon rubber latex or emulsion can be adjusted in the range of 50-85% at will, the high-stability silicon rubber latex or emulsion is further diluted with water in application until the solid content is 0.1-50%, the diluent is also stable, and no oil floating or layering can be caused after 180 days. The prepared latex or emulsion can be used for surface treatment and has lasting obviously-enhanced smooth and thick feeling style, and the style can be maintained for more than half a year and is not changed.

Description

technical field [0001] The invention relates to the field of new organic silicon chemical materials, in particular to a dilution-stable high-solid-content high-viscosity silicone rubber latex or emulsion and a preparation method thereof. Background technique [0002] High viscosity polydimethylsiloxane, especially viscosity (25°C) greater than 10 6 In practical application, polydimethylsiloxane of mpa.s is often called high-viscosity silicone rubber because of its almost non-flowing appearance. It has significantly enhanced slippery feeling than conventional medium-low viscosity polydimethylsiloxane. It has an irreplaceable role and value as a special hand feeling agent in the textile, paint, and daily chemical industries. It must be in the form of itself and a diluted and stable emulsion to fully meet the practicability. However, the diluted and stable high-viscosity polydimethylformaldehyde The preparation of silicone-based emulsion is still a technical problem both at ho...

Claims

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Application Information

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IPC IPC(8): C08L83/06C08J3/03C08G77/16
Inventor 张国杰李桂军李桂民冯会生张锋
Owner HUAIAN KAIYUE TECH DEV
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