Amphoteric reaction-type surfactant and preparation method thereof

A surfactant, amphoteric reaction technology, used in the preparation of carboxylic acid amides, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of poor freeze-thaw stability of latex, reduced film water resistance, slow film formation rate, etc. , to achieve the effect of excellent emulsifying performance, reducing material loss and not easy to homopolymerize

Inactive Publication Date: 2012-06-13
长兴三伟热熔胶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The emergence of polymerizable emulsifiers is to solve the problems that arise when using traditional surfactants, for example, under the action of high shear force, it is easy to produc

Method used

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  • Amphoteric reaction-type surfactant and preparation method thereof
  • Amphoteric reaction-type surfactant and preparation method thereof
  • Amphoteric reaction-type surfactant and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0023] Example 1

[0024] (1) Preparation of intermediate: Take 10.2g (0.10mol) of N,N-dimethyl-1,3-propanediamine, dissolve it in 50mL of benzene, and transfer to a dropping funnel. Take the molar ratio of n(N,N-dimethyl-1,3-propanediamine): n(maleic anhydride) of 1:1 maleic anhydride, dissolve it in 100mL of benzene, and transfer to In a 250mL three-necked flask, equipped with a stirrer, thermometer, dropping funnel, heated in a water bath, the dropping temperature is 30℃, and the dropping time is 1h. After the dripping is completed, the temperature is raised to 50℃, and the reaction is continued for 2h. , Stand still, filter after cooling, wash the filter cake several times with ethyl acetate, and wash the product several times with ethyl acetate. After filtering, dry under vacuum overnight at 40°C. The yield is calculated and the yield can reach 87.2%. Take an appropriate amount of product and determine the neutralization value to determine the amount of alkali required for ...

Example Embodiment

[0030] Example 2

[0031] (1) Preparation of intermediate: Take maleic anhydride and N,N-dimethyl-1,3-propanediamine and dissolve them in toluene at a molar ratio of 1.1:1, where N,N-dimethyl-1 , 3-Propane diamine is fed by dripping, the dripping temperature is about 25℃, and the dripping time is 0.5h. After the dripping is completed, the temperature is raised to 45℃, and the reaction is continued for 2h. After the reaction is over, let it stand still After cooling and filtering, the filter cake is obtained. The filter cake is washed with ethyl acetate, filtered and dried to obtain the product white powder, the intermediate N-(3-dimethylaminopropyl)maleamic acid.

[0032] (2) Preparation of amphoteric reactive surfactant: take water to dissolve the intermediate N-(3-dimethylaminopropyl) maleamic acid, the mass ratio of water to intermediate is 1.2:1, in the dissolved solution Add dropwise sodium hydroxide or potassium hydroxide solution with a mass concentration of 15% to adjust t...

Example Embodiment

[0034] Example 3

[0035] (1) Preparation of intermediate: Take maleic anhydride and N,N-dimethyl-1,3-propanediamine and dissolve them in xylene at a molar ratio of 1.2:1, where N,N-dimethyl- 1,3-propanediamine is fed by dripping, the dripping temperature is about 35℃, and the dripping time is 1.5h. After the dripping is completed, the temperature is raised to 55℃ and the reaction is continued for 2 to 3h. After the reaction is over, After standing, cooling and filtering, the filter cake is obtained. The filter cake is washed with ethyl acetate, filtered and dried to obtain a white powder, the intermediate N-(3-dimethylaminopropyl)maleamic acid;

[0036] (2) Preparation of amphoteric reactive surfactant: take water to dissolve intermediate N-(3-dimethylaminopropyl)maleamic acid, the mass ratio of water to intermediate is 1.5:1, in the dissolved solution Add dropwise sodium hydroxide or potassium hydroxide solution with a mass concentration of 30% to adjust the pH to 9; then add 1-...

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Abstract

The invention relates to an amphoteric reaction-type surfactant and a preparation method thereof. Specifically, the amphoteric reaction-type surfactant is a polymerizable surfactant having a good emulsification capability and belongs to the technical field of fine chemical engineering. The preparation method of the amphoteric reaction-type surfactant comprises the following steps that maleic anhydride and N,N-dimethyl-1,3-propanediamine undergo a reaction to produce an intermediate of N-(3-dimethylaminopropyl)maleamic acid; the intermediate of N-(3-dimethylaminopropyl)maleamic acid sequentially reacts with long-chain alkyl bromide; and the reaction products obtained by the previous step are subjected to post-treatment to form the amphoteric reaction-type surfactant. The preparation method provided by the invention adopts a neutralization reaction-quaternization reaction one-step synthesis method, wherein the neutralization reaction-quaternization reaction one-step synthesis method is characterized in that neutralization conditions are controlled in appropriate ranges; and after a neutralization reaction, a quaternization reaction is directly caused without separation and purification processes. Therefore, the preparation method provided by the invention can reduce a material loss produced in neutralization, time spent in neutralized product purification and reagents used in the neutralized product purification.

Description

technical field [0001] The invention relates to an amphoteric reactive surfactant and a preparation method thereof, in particular to an emulsifier of a polymerizable surfactant and a preparation method thereof, and belongs to the technical field of fine chemicals. Background technique [0002] Reactive surfactants refer to a class of surfactants that can participate in chemical reactions and have surface activity after the reaction. Compared with general surfactants, in addition to having hydrophilic groups and lipophilic groups, it also has groups that can participate in chemical reactions. According to the type of reactive group and the scope of application, reactive surfactants can generally be divided into polymerizable emulsifiers, surface active initiators, surface active chain transfer agents, surface active crosslinking agents and surface active modifiers. Research on emulsifiers is the most active. [0003] Foreign research on reactive emulsifiers began in the 195...

Claims

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Application Information

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IPC IPC(8): B01F17/22B01F17/18C07C233/38C07C231/12C09K23/22C09K23/18
Inventor 许虎君罗强章
Owner 长兴三伟热熔胶有限公司
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