Organic silicon modified polymeric nonionic surfactant and preparation method thereof

A non-ionic surface and silicone technology, which is applied in the field of polymeric non-ionic surfactants and their preparation, can solve the problems of difficult effective association structure of surfactants, unsatisfactory emulsification and dispersion, and easy foaming, etc. problems, to achieve the effect of easy control of structure, small molecular weight and good foam suppression

Active Publication Date: 2022-07-22
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the molecular weight of the product is very large, which makes it easy to foam and the foam is difficult to subside. It is not suitable for applications that require foam suppression and low foam; The nodes are located in the main chain. Due to the poor degree of freedom of the hydrophobic chain segments, it is difficult for the surfactant to form an effective association structure in the water-based system, resulting in unsatisfactory emulsification and dispersion.

Method used

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  • Organic silicon modified polymeric nonionic surfactant and preparation method thereof

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[0045] A first aspect of the present invention provides a preparation method of an organosilicon-modified polymeric nonionic surfactant, the method comprising the following steps:

[0046] (1) Preparation of raw materials: the raw materials include isocyanate, aliphatic alcohol polyoxyethylene ether, terminal bishydroxyhydrocarbyl polysiloxane, catalyst and solvent;

[0047] Described isocyanate is hexamethylene diisocyanate trimer;

[0048] Described fatty alcohol polyoxyethylene ether is AEO series fatty alcohol polyoxyethylene ether, JFC series fatty alcohol polyoxyethylene ether or Periplus series fatty alcohol polyoxyethylene ether;

[0049] The molecular weight of the terminal dihydroxy hydrocarbon polysiloxane is 1000-2000;

[0050] The molar fraction of each component in the raw material is: 1.0 isocyanate, 2.5-3.0 fatty alcohol polyoxyethylene ether, 0.1-0.3 bishydroxyl-terminated hydrocarbyl polysiloxane; wherein, the molar fraction of dihydroxyl-terminated hydrocar...

Embodiment 1

[0074] (1) raw material preparation, the concrete selection and consumption of described raw material are as shown in table 1;

[0075] (2) Polymerization: carry out polymerization reaction of isocyanate with terminal bishydroxyhydrocarbyl polysiloxane, aliphatic alcohol polyoxyethylene ether, catalyst and solvent to obtain an organosilicon-modified polymeric nonionic surfactant solution;

[0076] (2.1) adding fatty alcohol polyoxyethylene ether into the reactor, dehydrating in vacuum at 105°C for 90min, cooling to 67°C, for subsequent use;

[0077] (2.2) under stirring, successively add solvent, terminal bishydroxyhydrocarbyl polysiloxane, isocyanate and catalyst to another reactor, after mixing evenly, gradually heat up to 75°C in 30min, react for 50min, cool down to 72°C, set aside for later use ;

[0078] (2.3) under stirring, the material in (2.1) is added to the reaction system in (2.2), and the reaction temperature is controlled to be 75° C. for 90 min to obtain a poly...

Embodiment 2

[0083] (1) raw material preparation, the concrete selection and consumption of described raw material are as shown in table 1;

[0084] (2) Polymerization: carry out polymerization reaction of isocyanate with terminal bishydroxyhydrocarbyl polysiloxane, aliphatic alcohol polyoxyethylene ether, catalyst and solvent to obtain an organosilicon-modified polymeric nonionic surfactant solution;

[0085] (2.1) adding fatty alcohol polyoxyethylene ether into the reactor, dehydrating in vacuum at 105°C for 90min, cooling to 66°C, for subsequent use;

[0086](2.2) under stirring, successively add solvent, terminal bishydroxyhydrocarbyl polysiloxane, isocyanate and catalyst into another reactor, after mixing evenly, gradually heat up to 80°C in 20min, react for 50min, cool down to 77°C, set aside for later use ;

[0087] (2.3) under stirring, the material in (2.1) was added to the reaction system in (2.2), and the reaction temperature was controlled to be 80° C. for 100 min to obtain a ...

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Abstract

The invention relates to the technical field of surfactant preparation, in particular to an organic silicon modified polymeric nonionic surfactant and a preparation method thereof. The method comprises the following steps: (1) preparing raw materials including isocyanate, fatty alcohol-polyoxyethylene ether, dihydroxyalkyl-terminated polysiloxane, a catalyst and a solvent; (2) mixing isocyanate with dihydroxyalkyl-terminated polysiloxane, fatty alcohol-polyoxyethylene ether, a catalyst and a solvent, and carrying out polymerization reaction, so as to prepare an organic silicon modified polymeric nonionic surfactant solution; and (3) removing the solvent in the organic silicon modified poly-type nonionic surfactant solution. According to the preparation method, the difunctional end dihydroxyalkyl polysiloxane with weak reactivity is firstly reacted with the HDI tripolymer to preferentially form a double-end-capped product which is uniform in structure and is opposite to the end dihydroxyalkyl polysiloxane by the HDI tripolymer, and then the double-end-capped product and the monofunctional fatty alcohol-polyoxyethylene ether are subjected to an end-capped reaction, so that the accuracy of the structure of the product can be effectively controlled.

Description

technical field [0001] The invention relates to the technical field of surfactant preparation, in particular to an organosilicon-modified polymeric nonionic surfactant and a preparation method thereof. Background technique [0002] Nonionic multi-branched small molecule surfactants have the advantages of good compatibility and compatibility, strong emulsifying and dispersing ability, weak foaming and strong surface activity, and exhibit excellent wetting, dispersing, emulsifying and electrolyte resistance. performance. However, the currently disclosed nonionic surfactants are basically a linear double monobranched structure of "one long hydrophobic alkyl chain + one hydrophilic polyether chain segment"; while the nonlinear multibranched surfactants are basically Both are high molecular weight ionic comb-like structures. These surfactants have poor conformational adaptability to form micelles in aqueous systems and the adsorption layer formed at the oil-water interface, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/61C08G18/48
CPCC08G18/4009C08G18/61C08G18/4833
Inventor 权衡孙凯乐杨思浩林雪晴张思琪吴冰卫增峰
Owner WUHAN TEXTILE UNIV
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