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A kind of preparation method of cationic triblock copolymer latex

A copolymer latex and cationic technology, which is applied in the field of polymer material preparation, can solve the problems of the limitations of triblock copolymer synthesis methods and harsh synthesis conditions, and achieve easy continuous operation, mild reaction conditions, and metal residues. less effect

Active Publication Date: 2016-08-17
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of preparation method of the cationic triblock copolymer latex of environmental friendliness, wide practical scope of monomer, mild reaction condition, to solve the limitation of existing triblock copolymer synthetic method and the restriction of synthetic condition harshness, and produce ready-to-use cationic triblock copolymer latex

Method used

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  • A kind of preparation method of cationic triblock copolymer latex
  • A kind of preparation method of cationic triblock copolymer latex
  • A kind of preparation method of cationic triblock copolymer latex

Examples

Experimental program
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Embodiment 1

[0046] Preparation process of poly(styrene-b-butyl acrylate-b-styrene) block copolymer cationic latex

[0047] 1) The first stage: First, 125 parts by weight of butyl acrylate, 0.54 parts by weight of copper bromide and 1.65 parts by weight of BPMODA were uniformly mixed, deoxidized and heated to 60°C, heated and stirred for half an hour, and cooled to room temperature; Mix ethylene glycol dibromoisobutyrate, 1 part by weight of cetyltrimethylammonium bromide, and 1736 parts by weight of an aqueous solution; stir ultrasonically for half an hour in an ice bath to form a pre-emulsion. Transfer the obtained emulsion to a reaction bottle, deoxidize and raise the temperature to 80°C, add 347 parts by weight of a deoxygenated aqueous solution in which 0.17 parts by weight of vitamin C is dissolved, and react for 10 hours to obtain a butyl acrylate block;

[0048] 2) The second stage: 137.5 parts by weight of styrene, 1 part by weight of cetyltrimethylammonium bromide, 0.17 parts by ...

Embodiment 2

[0050] Preparation process of poly(styrene-b-isobutyl acrylate-b-styrene) block copolymer cationic latex

[0051] 1) The first stage: First, 125 parts by weight of isobutyl acrylate, 0.54 parts by weight of copper bromide and 1.65 parts by weight of BPMODA are uniformly mixed, deoxidized and heated to 60°C, heated and stirred for half an hour, cooled to room temperature, and 1 part by weight Ethylene glycol dibromoisobutyrate, 1 part by weight of cationic emulsifier Gemini16-3-16, and 1736 parts by weight of an aqueous solution were mixed, and ultrasonically stirred for half an hour in an ice bath to form a pre-emulsion, and the resulting emulsion was transferred to a reaction flask. Deoxidation is heated to 80°C, 347 parts by weight of a deoxygenated aqueous solution dissolved with 0.17 parts by weight of vitamin C is added, and reacted for 12 hours to obtain an isobutyl acrylate block;

[0052] 2) The second stage: 137.5 parts by weight of styrene, 1 part by weight of cation...

Embodiment 3

[0054] Preparation process of poly(styrene-b-isooctyl acrylate-b-styrene) block copolymer cationic latex

[0055] 1) The first stage: First, mix 368 parts by weight of isooctyl acrylate, 0.72 parts by weight of ferric bromide and 1.5 parts by weight of 4,4'-dinonyl-2,2'-bipyridyl, and heat up to 50°C for deoxidation , heated and stirred for half an hour, cooled to room temperature, added 1 weight part of ethylene glycol dibromoisobutyrate, 2 weight parts of cationic emulsifier Gemini12-6-12, 3500 weight parts of aqueous solution, and ultrasonically stirred in an ice bath Form a pre-emulsion in half an hour, transfer the resulting emulsion to a reaction bottle, deoxidize and heat up to 70°C, add 347 parts by weight of a deoxygenated aqueous solution in which 0.5 parts by weight of stannous octoate is dissolved, and react for 6 hours to obtain an isooctyl acrylate block;

[0056] 2) The second stage: 137.5 parts by weight of styrene, 1 part by weight of cationic emulsifier Gemin...

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Abstract

The invention discloses a preparation method of cationic triblock copolymer latex. The present invention uses bifunctional organic halides as initiators, transition metal complexes as halogen atom carriers, strongly hydrophobic pyridine derivatives as ligands, cationic surfactants as emulsifiers, vitamin C or stannous octoate as reducing agents, The stable tri-block copolymer cationic latex is directly obtained by AGET-ATRP (electron activation regeneration-atom transfer radical polymerization) two-step emulsion polymerization. The process of the invention is simple, the process is environmentally friendly and energy-saving, and the cationic latex of the block copolymer has good application prospects in many fields such as modified asphalt, adhesive, polymer modification and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer material preparation, and relates to a preparation method of a cationic three-block copolymer latex. Background technique [0002] Tri-block copolymers are copolymers in which homopolymeric blocks composed of three structural units are covalently bonded to each other to form a main chain, and each block contains only one structural unit. Because different blocks have different physical and chemical properties, triblock copolymers usually exhibit excellent properties that homopolymeric polymers do not possess, and can be widely used in various fields such as biology, medical treatment, and construction. [0003] Living polymerization can obtain tri-block polymers with narrow molecular weight distribution, which is the most ideal method to control the molecular weight and molecular weight distribution of polymers. Living polymerization includes living ionic polymerization (living cationic polymeriz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F293/00C08F212/08C08F212/12C08F220/16C08F220/14
Inventor 解孝林王振薛志刚周兴平叶昀昇李晓静
Owner HUAZHONG UNIV OF SCI & TECH