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A kind of preparation method of methacryloyloxyethyltrimethylammonium chloride polymer with adjustable molecular weight

A technology of methacryloyloxyethyltrimethylammonium chloride and polymer is applied in the field of homopolymer preparation, which can solve the problems of high intrinsic viscosity and low molecular weight, achieve good water solubility, save energy costs, The effect of wide application prospects

Active Publication Date: 2019-09-10
JIANGSU FEYMER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing DMC polymerization reaction, the commonly used initiators mainly include azo, redox and peroxy compounds. The molecular weight of the polymerization product (PDMC) reported so far is low, and the intrinsic viscosity is the highest. 14.7dL / g

Method used

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  • A kind of preparation method of methacryloyloxyethyltrimethylammonium chloride polymer with adjustable molecular weight

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 750g of technical grade DMC (80%), 250g of deionized water, 0.5g of azobisisobutylimidazoline hydrochloride, 0.5g of 2,4,6 (trimethylbenzoyl) diphenylphosphine oxide, ethyl Add 1 g of disodium diaminetetraacetic acid into the reaction kettle and mix evenly, adjust the pH to 3.5 with adipic acid, and then continuously feed the material into the belt polymerization reactor with ultraviolet light after passing through the deoxygenation tank to obtain the polymer block, which is manufactured. granules, dried and pulverized to obtain 630g of PDMC homopolymer product, intrinsic viscosity 5.5dL / g~7.5dL / g, molecular weight 200~3 million, monomer conversion rate 99.62%

Embodiment 2

[0024] Highly active DMC (80%) 750g, deionized water 250g, azobisisobutylimidazoline hydrochloride 0.25g, 2,4,6 (trimethylbenzoyl) diphenylphosphine oxide 0.5g, ethyl Add 1 g of disodium diaminetetraacetic acid into the reaction kettle and mix evenly, adjust the pH to 3 with adipic acid, and then continuously feed the material into the belt polymerization reactor with ultraviolet light after passing through the deoxygenation tank to obtain polymerized rubber blocks, which are manufactured. granules, dried, and pulverized to obtain 632 g of a PDMC homopolymer product, with an intrinsic viscosity of 6 dL / g to 8 dL / g, a molecular weight of 2.5 to 3.5 million, and a monomer conversion rate of 99.52%.

Embodiment 3

[0026] High activity (80%) 800g, deionized water 200g, azobisisobutylimidazoline hydrochloride 0.5g, 2,4,6 (trimethylbenzoyl) diphenylphosphine oxide 0.6g, bismethyl Add 0.012g of ethylene glycol acrylate and 1g of disodium ethylenediaminetetraacetate into the reactor and mix evenly. Adjust the pH to 3.5 with adipic acid. After passing through the deoxygenation tank, continuously feed the material to the belt polymerization system with ultraviolet light initiation. The reactor is used to obtain a polymer block, which is granulated, dried, and pulverized to obtain 640 g of a PDMC homopolymer product, with an intrinsic viscosity of 8 dL / g to 10 dL / g, a molecular weight of 3.5 million to 4.5 million, and a monomer conversion rate of 99.58%.

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Abstract

The invention discloses a preparation method of methacryloyloxyethyl trimethyl ammonium chloride polymer with adjustable molecular weight. The preparation method comprises the following steps: adding activated DMC monomers, deionized water, an initiator, a molecular weight regulator and a metal chelator into a proportioning vessel and mixing evenly, regulating the pH to 2-7 with weak acid, performing deoxygenation operation, then feeding materials into an ultraviolet light-induced polymerization reactor for reacting to obtain polymerized gommures, pelletizing, drying and crushing to obtain solid powder of the polymer, wherein the molecular weight regulator is one of or a combination of more of compounds with allyl or acryloyl functional group, PDMC prepared by adopting the method has the advantages of being high in stability, good in water solubility, and the like, and the product has wide application prospects in the water treatment industry and oilfield industry.

Description

technical field [0001] The invention relates to a method for preparing a homopolymer with adjustable molecular weight. Background technique [0002] Methacrylatoethyhrimethyl ammonium chloride (DMC for short) is one of the cationic monomers commonly used at present, and foreign countries began to study the production technology of DMC monomer in the late 1970s. The product (PDMC) obtained by the polymerization of such cationic monomers has the advantages of adjustable cationicity, high stability, and good water solubility. This type of polymer polyelectrolyte has gradually become the leading product in the market. At present, the research on DMC polymers in the literature mainly focuses on the application field. Due to the reasons of commercial secrecy, foreign companies rarely report on its preparation process. [0003] For polymers, especially polyelectrolytes, the unit structure and molecular weight of the compound determine its basic properties and application performan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F120/34C08F2/48C08F2/38
Inventor 段立明何国锋王勤冯晨宗蕾金飞陈斌
Owner JIANGSU FEYMER TECH