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Quaternary ammonium methacrylate copolymer A-type aqueous dispersion and preparation method thereof

A technology of methacrylate and copolymer, which is applied in the field of quaternary ammonium methacrylate copolymer A-type water dispersion and its preparation, can solve the problems of limiting the scope of application, increasing the safety risk in the preparation workshop, and achieving smooth and fast operation. , good controllability, good moisture resistance

Pending Publication Date: 2022-04-12
悦康药业集团安徽天然制药有限公司
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  • Description
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Problems solved by technology

This not only limits its scope of application, but also increases the safety risk of the preparation workshop

Method used

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Embodiment Construction

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below, obviously, the described embodiments are only some of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0023] Quaternary ammonium methacrylate copolymer type A water dispersion, including polyammonium methacrylate Ⅰ 60g, sorbic acid 0.5g, n-octanoic acid 3g, polysorbate 801.8g, dibutyl sebacate / triethyl citrate 1.8 g, mass percent: 2.5% sodium hydroxide solution 3g, purified water 145g.

[0024] The preparation method of quaternary ammonium methacrylate copolymer A type water dispersion, comprises the following steps:

[0025] 1. Weigh 1.8g of polysorbate 80, dissolve it in 145g of water, and add it to the reaction flask;

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Abstract

The invention discloses a quaternary ammonium methacrylate copolymer A-type aqueous dispersion and a preparation method thereof. The aqueous dispersion is prepared from the following raw materials in parts by weight: poly ammonium methacrylate I, sorbic acid, n-caprylic acid, polysorbate 80, dibutyl sebacate / triethyl citrate, a sodium hydroxide solution with the mass percent of 2.5% and purified water. The preparation method comprises the following steps: weighing polysorbate 80, dissolving the polysorbate 80 in water, stirring, adding sorbic acid, and continuously stirring; heating and raising the temperature, and stirring for 30 minutes; adding poly (ammonium methacrylate) I and n-caprylic acid, and heating for reaction; adding dibutyl sebacate / triethyl citrate into the reaction bottle, and continuously carrying out heat preservation reaction; and after the reaction is finished, cooling, adding a sodium hydroxide solution with the mass percent of 2.5%, stirring and discharging. The quaternary ammonium methacrylate copolymer A-type aqueous dispersion prepared by the preparation method disclosed by the invention has good moisture resistance.

Description

technical field [0001] The invention relates to the technical field of medicine and chemical industry, in particular to a type A aqueous dispersion of quaternary ammonium methacrylate copolymer and a preparation method thereof. Background technique [0002] Water dispersion is a dispersion system with water as the dispersion medium. Its main characteristic is that the particle size of the dispersed phase is between 10-1000nm, and the appearance of the water dispersion is milky, also known as latex. These particles will not settle due to thermal convection and Brownian motion; another feature is high solid content, generally 28-30% (w / w), but low viscosity, easy to spray coating operation, and high efficiency. Compared with polymer organic solution coating, it is safe to use and has no environmental pollution problem. [0003] In recent years, with the rapid development of the pharmaceutical industry, new excipients are constantly emerging, and polyacrylic acid resin latex a...

Claims

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Application Information

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IPC IPC(8): A61K9/32A61K9/22A61K47/32A61K47/12A61K47/26A61K47/14
Inventor 李玉生马萍刘维坦张敬彬王新海王路
Owner 悦康药业集团安徽天然制药有限公司
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