- Copolymerization of the poly(N,N-dimethyl-N,N-diallylammonium chloride) macromonomer with acrylamide
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Copolymers of the poly(N,N-dimethyl-N,N-diallylammonium chloride) macromonomer (1′) with acrylamide (2) with a high content of cationic groups (up to 50%) were synthesized. The relative activities r 1′ and r 2 were calculated. The relative activities calculated by the Kelen-Tudos (r 1′ = 0.057±0.009, r 2 = 1.57±0.12) and Feynman-Ross (r 1′ = 0.055±0.011, r 2 = 1.58±0.14) methods are in accordance. The intrinsic viscosity and the yield of copolymers were found to decrease with an increase in the molar fraction of macromonomer 1′ in the monomer mixture.
- Kalyazina,Murzabekova,Lelyukh,Gritskova
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- Method for continuously synthesizing dimethyl diallyl ammonium chloride (by machine translation)
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The solution, of the dimethyl diallyl ammonium chloride obtained by filtering and removing the precipitated sodium chloride, in the microreactor was stirred for 5-15 minutes, in a micro-reactor by 30-70 °C, minutes to, minutes at, ° C. and then collected to remove the separated impurities, in the micro-reactor to remove the precipitated sodium chloride, from the aqueous phase PH and then collect the precipitated sodium chloride stream 4-6, to obtain a clear liquid, to remove the precipitated sodium chloride solution. The present invention solves the problems of slow reaction time and the like, during the synthesis of dimethyl diallyl ammonium chloride solution, The present invention solves the problem of, difficulty, in controlling, reaction time in the synthesis process of dimethyl diallyl ammonium chloride. (by machine translation)
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Paragraph 0020-0026
(2020/05/02)
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- High-yield preparation method of high-purity dimethyl diallyl ammonium chloride monomer
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The invention belongs to the technical field of organic synthesis, and specifically relates to a high-yield preparation method of a high-purity dimethyl diallyl ammonium chloride monomer. According tothe preparation method provided by the invention, a segmented type chloropropene and sodium hydroxide solution alternative and dropwise adding method is adopted, the most suitable alternative and dropwise adding amount and the most suitable reaction time of the chloropropene and the sodium hydroxide solution can be found through a large amount of small-scale tests and by adopting an acid-base indicator, the chloropropene can be prevented from being located in strong base environment, a large amount of byproducts such as allyl alcohol can be effectively prevented from being generated, the utilization rate of the chloropropene can be effectively increased, and by adopting a pressure-proof closed reaction kettle, dimethylamine is enabled not to leak and can completely take part in reaction.A dimethyl diallyl ammonium chloride monomer solution obtained through the preparation method is light in color and less in impurities, activated carbon is not used for decoloring and removing the impurities, the purity is high, the contents of amine salt and chlorine ions are extremely low, the yield is approximate to ideal value, a product is used for homopolymerization experiments, a colorless,transparent and clear polymer solution is obtained, and the viscosity and the molecular weight of the colorless, transparent and clear polymer solution are far higher than those of like products.
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Paragraph 0069-0071; 0081-0084
(2019/03/31)
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- One-step production method of 60% dimethyl diallyl ammonium chloride solution
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The invention relates to a one-step production method of 60% dimethyl diallyl ammonium chloride solution. The method includes the steps: firstly, taking solid sodium hydroxide as a raw material, uniformly mixing the solid sodium hydroxide and dimethylamine solution, dripping chloropropene at the temperature of 15-25 DEG C, and keeping the reaction temperature of 20-30 DEG C after dripping until mixed reaction liquid is changed into homogeneous liquid; secondly, adjusting a pH (potential of hydrogen) value to reach 6-6.5, and separating and removing sodium chloride generated by reaction to obtain the dimethyl diallyl ammonium chloride solution with the content of 58-62%. According to the method, the reaction temperature is low, the purity of acquired products is high, impurity content is low, monomer reactivity is high, distillation and concentration of the products are omitted, and energy is saved.
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Paragraph 0020-0021; 0025-0026; 0030-0031
(2018/08/28)
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- A cationic monomer is dimethyl diallyl ammonium chloride synthetic method
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The invention discloses a synthesis method of cationic monomer dimethyl diallyl ammonium chloride, belongs to the technical field of organic chemical industry, and particularly relates to synthesis of dimethyl diallyl ammonium chloride. The synthesis method comprises the following steps: firstly, performing distillation on a 30-40% dimethylamine solution at low-temperature, and absorbing by using a dimethylamine solution with the same concentration and in a low-temperature state to obtain a concentrated dimethylamine solution with the mass concentration of 55-65%; secondly, at 0-10 DEG C, slowly adding 1/8-1/ 6 of chloropropene into the concentrated aqueous dimethylamine solution, and performing early tertiary amination reaction; thirdly, adding the rest chloropropene and a sodium hydroxide solution with the mass concentration of 45-55% dropwise, and performing neutralization reaction and the early tertiary amination reaction; finally, performing quaternization reaction, and purifying to obtain the cationic monomer dimethyl diallyl ammonium chloride. According to the synthesis method, the distillation temperature is relatively low and the negative pressure environment is not required, so that the operation is safer, the reaction speed is high, few intermediate products are generated, and the production capacity of a device can be improved.
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Paragraph 0031; 0032; 0033
(2016/10/07)
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- A preparation of dimethyl diallyl ammonium chloride
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The invention discloses a method for preparing dimethyl diallyl ammonium chloride, which comprises the following steps: mixing a 20-50 wt% dimethylamine aqueous solution and a 25-40 wt% sodium hydroxide water solution; respectively and simultaneously pumping chloropropene and the mixed solution into a microchannel modular reactor, and keeping at the temperature of 25-65 DEG C for 5-20 minutes; and introducing the discharged material of the microchannel modular reactor into a separator, standing to stratify, removing the supernatant turbid oil, taking the understratum water layer, regulating the pH value to 5-7, and carrying out vacuum distillation and activated carbon adsorption decolorization to obtain the high-grade dimethyl diallyl ammonium chloride water solution. The preparation method disclosed by the invention is a continuous process, and has the characteristics of controllable preparation technique, high safety, mild reaction conditions, short reaction retention time and stable product quality; and the production device is simple, and is easy for disassembly and assembly and convenient to carry and move. The device can be conveniently adjusted by simply increasing or decreasing the quantity of the microchannels.
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Paragraph 0025; 0026
(2017/04/06)
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- IMIDAZOLIUM ALKYL (METH)ACRYLATE POLYMERS
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The present invention relates to the use of imidazolium alkyl(meth)acrylate homo- and copolymers in cosmetic preparations and to the corresponding cosmetic preparations.
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- Sulfobetaines
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The invention relates to new sulfobetaines and a process for the manufacture of cyclic sulfobetaines of a substituted 4-sulfomethyl-pyrrolidinium betaine type.Diallylammonium combinations are converted with salts of sulfurous acid, under good mixing and mild reaction conditions, in the presence of catalytic acting transition metallic ions of the first, fifth, seventh or eighth secondary groups of the Period Table and initiators at pH 2-9. The process is technologically easily carried out, requires only little energy, while the combinations according to this invention can be selectively manufactured with a nearly quantitative yield. The fact that no carcinogenic alkylates are employed, technical chemicals and tap water may be used, and hardly any by-products are formed, may be regarded as further advantages of this process.The substances can be used for multiple purposes, for instance as conductive coating and antistatic materials. Moreover, long-chained substituted compounds have valuable surface tension qualities and an excellent cleaning power at low temperatures.
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