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Methacryloyloxyethyl-dimethyl ammonium propanesulfonate and preparation method thereof

A technology of ammonium methacryloyloxyethyldimethylpropanesulfonate and ethyl dimethylamino methacrylate is applied in the preparation of sulfonates, organic chemistry, etc., and can solve the problems of high preparation cost, poor controllability, Complex preparation process and other problems, to achieve high yield, eliminate steel corrosion, and simplify the process.

Inactive Publication Date: 2017-01-04
LIMING VOCATIONAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of ammonium methacryloyloxyethyl dimethyl propane sulfonate and preparation method thereof, aiming at solving the problems of high preparation cost, complex preparation process and poor controllability of current quaternary ammonium salt cationic active monomers. question

Method used

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  • Methacryloyloxyethyl-dimethyl ammonium propanesulfonate and preparation method thereof

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preparation example Construction

[0022] Such as figure 1 Shown: the preparation method of a kind of methacryloyloxyethyl ammonium dimethyl propane sulfonate provided by the invention comprises the following steps:

[0023] S101: First, weigh different amounts of 1, 3-propyl sultone monomer and N, N-dimethylaminoethyl methacrylate monomer, and dissolve them in 40 mL of acetone reaction solvent to prepare a concentration of 1.125- 1.875mol·L -1 1, 3-propyl sultone monomer acetone solution and N, N-dimethylaminoethyl methacrylate monomer acetone solution;

[0024] S102: Using different feeding methods, add the pre-prepared 1, 3-propyl sultone monomer acetone solution and N, N-dimethylaminoethyl methacrylate monomer acetone solution into the round bottom flask, seal , at 25°C, one-step reaction in the dark for a certain period of time;

[0025] S103: After the reaction is completed, place it in an ice-water bath for cooling. After the product is precipitated, place it in a vacuum filtration device for suction ...

Embodiment 1

[0040] Accurately weigh 1, 3-propyl sultone monomer (purity above 99%) and 9.4g of N, N-dimethylaminoethyl methacrylate monomer (purity above 99%), dissolve them separately Prepare 1,3-propyl sultone monomer acetone solution and N, N-dimethylaminoethyl methacrylate monomer acetone solution in 40mL of acetone reaction solvent; , 3-Propyl sultone monomer acetone solution and N, N-dimethylaminoethyl methacrylate monomer acetone solution were added to a round bottom flask, sealed, and reacted for a certain period of time at 25°C in the dark; Cool in an ice-water bath, filter with suction, wash with low-temperature acetone for 3 times, and then vacuum-dry at 25°C for 24 hours to obtain an amphoteric organic active monomer for synthesizing a chloride-free amphoteric polycarboxylate high-performance water reducer Ammonium methacryloxyethyl dimethyl propane sulfonate finished product.

[0041] Preferably, the molar ratio of 1,3-propyl sultone monomer to N, N-dimethylaminoethyl methac...

Embodiment 2

[0047] It is basically the same as Example 1, the difference is:

[0048] Preferably, the molar ratio of 1,3-propyl sultone monomer to N,N-dimethylaminoethyl methacrylate monomer in the step is 0.75:1.

[0049] Preferably, the different feeding methods in the steps are using the acetone reaction solvent as the base liquid, and adding N, N-dimethylaminoethyl methacrylate monomer and 1, 3-propyl sultone monomer in sequence.

[0050] Preferably, the one-step reaction time at 25° C. protected from light in the step is 36 hours.

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Abstract

The invention discloses methacryloyloxyethyl-dimethyl ammonium propanesulfonate and a preparation method and the molecular structure thereof. The method includes the steps that 1,3-propanesultone monomers and 2-(dimethylamino)ethyl methacrylate monomers with different use amounts are weighed first, a 1,3-propanesultone monomer acetone solution and a 2-(dimethylamino)ethyl methacrylate monomer acetone solution which are prepared in advance are added into a round-bottom flask in different adding modes, and a one-step reaction is carried out for a certain time under the light-proof condition; ice-water bath cooling, suction filtration and vacuum drying are carried out, and the finished product is obtained. Methacryloyloxyethyl-dimethyl ammonium propanesulfonate has excellent dispersing performance, superior plasticity maintaining performance and high early strength performance on cement systems or concrete; meanwhile, the potential hazard of reinforcement corrosion caused when methacryloyloxyethyl-dimethyl ammonium propanesulfonate is applied to reinforced concrete can be eliminated.

Description

technical field [0001] The invention belongs to the technical field of synthesizing amphoteric organic active monomers of polycarboxylic acid high-performance water reducers, and in particular relates to a methyl group of amphoteric organic active monomers used for synthesizing chlorine-free amphoteric polycarboxylate high-performance water reducers. Ammonium acryloyloxyethyl dimethyl propane sulfonate and its preparation method. Background technique [0002] With the implementation of the national "Belt and Road" strategy and the establishment of the Asian Infrastructure Investment Bank, the construction of major engineering projects such as roads, bridges, railways, dams, oceans, ports and nuclear power will be accelerated. Modern concrete structures rely on high-performance concrete technology. High-performance concrete has been widely used in the field of infrastructure construction due to its wide source of raw materials, low price, simple preparation process and high s...

Claims

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Application Information

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IPC IPC(8): C07C309/14C07C303/32
CPCC07C309/14C07C303/32
Inventor 陈宝璠卓玲
Owner LIMING VOCATIONAL UNIV
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