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A kind of ultra-high molecular weight polysiloxane emulsion and its preparation method and special equipment

A technology of polysiloxane emulsion and ultra-high molecular weight, which is applied in the direction of chemical instruments and methods, applications, mixers, etc., can solve the problems of insufficient smooth and oily feeling, short hand feeling retention time, low monomer conversion rate, etc. Achieve good emulsification effect, high molecular weight and high dispersion efficiency

Inactive Publication Date: 2016-08-17
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of emulsion type silicone hand feeling agent can be divided into external emulsification method and internal emulsification method. The internal emulsification preparation method is: use octamethylcyclotetrasiloxane (D 4 ) as the starting material, emulsified with a suitable emulsifier, and then ring-opened polymerization with a catalyst. However, the silicone emulsion prepared by this method has a low monomer conversion rate and a small molecular weight. When used as a leather hand agent, its slippery feeling Too much but not enough greasy feel, and its hand feeling is kept for a short time, etc.
Take octamethylcyclotetrasiloxane (D 4 ) as the starting raw material, adding a catalyst for ring-opening polymerization, and adding a silicone coupling agent for bulk polymerization, a high-component, high-viscosity silicone polymer can be prepared, which can be formulated into an emulsion for leather surface coating, which can impart The surface of the leather has oily and smooth feel, and it stays on the leather surface for a long time, which improves the durability of the feel. However, the silicone prepared by this method is insoluble in water, and because the viscosity is above 150000cs, use a stirrer, Commonly used dispersing equipment such as high-speed shear disperser and sand mill cannot make it disperse into a uniform emulsion

Method used

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  • A kind of ultra-high molecular weight polysiloxane emulsion and its preparation method and special equipment
  • A kind of ultra-high molecular weight polysiloxane emulsion and its preparation method and special equipment

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Embodiment 1

[0025] A kind of ultrahigh molecular weight polysiloxane emulsion, the preparation method of this ultrahigh molecular weight polysiloxane emulsion is as follows: (1) 20g of fatty alcohol polyethylene oxide, 4g of fatty alcohol polyoxyethylene ether, lauryl Put 6g of sodium sulfonate and 4g of glycerin in turn into a stirred reactor and stir for 1h, and stir while adding to prepare a composite emulsifier for use. The HLB value of the composite emulsifier is 12.3; Put 100g of oxane, 33g of composite emulsifier and 200g of deionized water into the disperser in sequence, evacuate to -0.01Mpa, heat to 40°C, stir for 2h, and discharge to obtain ultra-high molecular weight polysiloxane emulsion.

Embodiment 2

[0027] A kind of ultrahigh molecular weight polysiloxane emulsion, the preparation method of this ultrahigh molecular weight polysiloxane emulsion is as follows: (1) 20g of fatty alcohol polyethylene oxide, 5g of fatty alcohol polyoxyethylene ether, lauryl Put 6g of sodium sulfonate and 3g of glycerin in turn into a stirred reactor and stir for 1h, and stir while adding to prepare a composite emulsifier for use. The HLB value of the composite emulsifier is 12.4; Put 100g of oxane, 33g of composite emulsifier and 220g of deionized water into the disperser in sequence, vacuumize to -0.01Mpa, heat to 45°C, stir for 3h, and discharge to obtain ultra-high molecular weight polysiloxane emulsion.

Embodiment 3

[0029] A kind of ultrahigh molecular weight polysiloxane emulsion, the preparation method of this ultrahigh molecular weight polysiloxane emulsion is as follows: (1) 20g of fatty alcohol polyethylene oxide, 5g of fatty alcohol polyoxyethylene ether, lauryl Put 4g of sodium sulfonate and 4g of glycerin in turn into a stirred reactor and stir for 1.5h, and stir while adding to prepare a composite emulsifier for use. The HLB value of the composite emulsifier is 12.3; 100g of siloxane, 32g of composite emulsifier and 250g of deionized water were placed in the disperser in sequence, vacuumed to -0.01Mpa, heated to 42°C, stirred for 2.5h, and discharged to obtain an ultra-high molecular weight polysiloxane emulsion.

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Abstract

The invention relates to an ultra-high molecular weight polysiloxane emulsion and its preparation method and special equipment, belonging to the technical field of chemical coating materials. The ultra-high molecular weight polysiloxane emulsion is composed of the following components in parts by mass: viscosity 150,000 ~200000cs polysiloxane 100 parts, composite emulsifier 20~50 parts, deionized water 150~300 parts, the composite emulsifier is composed of the following components by weight: fatty alcohol polyethylene oxide 15 ~25 parts, fatty alcohol polyoxyethylene ether 2~8 parts, sodium dodecylsulfonate 3~7 parts, polyol 2~6 parts. The compatibility of each component of the composite emulsifier in the present invention is reasonable, the HLB value is in a reasonable range, and the emulsification effect is good when used for the emulsification of ultra-high molecular weight polysiloxane, and the emulsification efficiency is high; the ultra-high molecular weight polysiloxane prepared by the present invention The emulsion has high molecular weight and high viscosity. It is used for leather surface finishing, which can give the leather surface an oily and smooth feel, and stays on the leather surface for a long time.

Description

technical field [0001] The invention relates to an ultra-high molecular weight polysiloxane emulsion, a preparation method and special equipment thereof, and belongs to the technical field of chemical coating materials. Background technique [0002] With the rise and development of the organosilicon chemical industry, the organosilicon industry has developed rapidly. Because of its unique properties, silicone has been widely used in various sectors of the national economy. At present, there are hundreds of varieties of silicone products in the market, and it has also achieved good results in leather and fur applications. It can give leather With new features: the leather body is soft, elastic, refreshing and comfortable to the touch, and a discontinuous microporous film can be formed on the surface of the leather, which does not affect the breathability and hygienic performance of the leather. It is an ideal leather chemical material. Organosilicon hand feel agent is used f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08J3/03C09D183/04C14C11/00B01F7/16
Inventor 朱春凤刘赫扬
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY