Comb-type structure activity polymer and its preparation technique and application

A kind of active polymer and preparation technology, applied in the field of polyurethane structural active polymer, can solve the problems of limited thickening ability of aqueous solution, weak foaming power and penetrating power, poor surface tension ability, etc., and achieve good water solubility and molecular weight The effect of high and high temperature and salt resistance

Inactive Publication Date: 2008-09-10
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing molecular weight is 10 4 ~10 6 Water-soluble polymers, such as polyvinyl alcohol, hydroxypropyl cellulose, acrylic acid copolymer, polyvinylpyrrolidone, etc., have good dispersion, foam stabilization, gel protection and solubilization capabilities, but poor surface tension reduction capabilities, foaming Weak force and penetration
Molecular weight is 10 3 ~10 4 Water-soluble polymers, such as polyoxyethylene-propylene oxide block copolymers, alkylphenol polyoxyethylene ethers and their derivatives, fatty alcohol polyoxyethylene ethers, etc., have good surface activity, but the thickening ability of their aqueous solutions Extremely limited, the molecular weight also belongs to the low molecular weight category in the polymer field

Method used

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  • Comb-type structure activity polymer and its preparation technique and application
  • Comb-type structure activity polymer and its preparation technique and application
  • Comb-type structure activity polymer and its preparation technique and application

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Experimental program
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Effect test

Embodiment 1

[0031] Embodiment 1: Preparation of comb-shaped structure active polymer: adopting a four-mouth vessel with stirring, heating and cooling equipment as the reaction device, the steps are:

[0032] (1) Under nitrogen atmosphere, maleic anhydride and triethylene glycol were fully mixed and stirred, and reacted at 75° C. for 1 hour;

[0033] (2) Add the catalyst dibutyltin dilaurate dropwise to the above reaction system, then add isophorone diisocyanate, and react at 85° C. for 2 hours to obtain a prepolymer whose end group is isocyanate;

[0034] (3) Add hydroxyethyl acrylate dropwise to the above reaction system, react at 75° C. for 1 h, and react the hydroxyl group of hydroxyethyl acrylate with the isocyanate of the above prepolymer;

[0035] (4) After the above reaction is completed, the temperature is lowered to 70°C, and an aqueous solution of sodium sulfite is added to cause a nucleophilic addition reaction to obtain an active macromonomer with an α-sodium sulfonate group; ...

Embodiment 2

[0044] Embodiment 2: Preparation of comb-shaped structure active polymer: using a four-mouth container with stirring, heating and cooling equipment as the reaction device, the steps are:

[0045] (1) Under nitrogen atmosphere, maleic anhydride and triethylene glycol were fully mixed and stirred, and reacted at 50°C for 1.5h;

[0046] (2) Add the catalyst dibutyltin dilaurate dropwise to the above reaction system, then add isophorone diisocyanate, and react at 95° C. for 1 hour to obtain a prepolymer whose end group is isocyanate;

[0047] (3) Add hydroxyethyl acrylate dropwise to the above reaction system, and react at 85° C. for 0.5 h, so that the hydroxyl group of hydroxyethyl acrylate reacts with the isocyanate of the above prepolymer;

[0048] (4) After the above reaction is completed, the temperature is lowered to 60 ° C, and an aqueous solution of sodium sulfite is added to cause a nucleophilic addition reaction to obtain an active macromonomer with an α-sodium sulfonate...

Embodiment 3

[0057] Embodiment 3: Preparation of comb-shaped structure active polymer: adopting a four-mouth vessel with stirring, heating and cooling equipment as a reaction device, the steps are:

[0058] (1) Under nitrogen atmosphere, maleic anhydride and triethylene glycol were fully mixed and stirred, and reacted at 60°C for 0.5h;

[0059] (2) Add the catalyst dibutyltin dilaurate dropwise to the above reaction system, then add isophorone diisocyanate, and react at 90°C for 1.5h to obtain a prepolymer whose end group is isocyanate;

[0060] (3) Add hydroxyethyl acrylate dropwise to the above reaction system, and react at 80° C. for 1 h, so that the hydroxyl group of hydroxyethyl acrylate reacts with the isocyanate of the above prepolymer;

[0061] (4) After the above reaction is completed, the temperature is lowered to 75° C., and an aqueous solution of sodium sulfite is added to cause a nucleophilic addition reaction to obtain an active macromonomer with an α-sodium sulfonate group; ...

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Abstract

The invention discloses a comb-type structural reactive polymer with the molecular weight ranging between 1x10<5> and 5x10<6>, wherein the main chain of the reactive polymer is obtained through the copolymerization of acrylamide monomer and functional monomers such as 2-acrylamido-2-methylpropanesulfonic acid and acrylic acid sodium salt, etc., which endues polymer aqueous solution with higher apparent viscosity and better temperature resistance and salt resistance; and the branched chain of the reactive polymer consists of unsaturated macromonomer molecule, which endues the polymer aqueous solution with higher surface activity. The invention also discloses a preparation method for the polymer, comprising the following steps: firstly, through process operation including esterification, prepolymerization and sulfonation, polyurethanes active macromonomer with a novel structure is prepared; then, under the action of oxidation reduction initiator, the copolymerization reaction of the active macromonomer and other functional micromolecule monomers is initiated quickly at low temperature. The comb-type structural reactive polymer can be used as oil displacement agent and has the advantages of high molecular weight and low surface tension, etc.

Description

technical field [0001] The invention relates to a polyurethane structural active polymer and its preparation process and application. Background technique [0002] Active polymer refers to the molecular weight greater than 10 3 , a high-molecular compound with the function of reducing surface tension, which has both the characteristics of thickening and surface activity, is a promising oil displacement agent, this active polymer is composed of lipophilic components and hydrophilic components Composition: On the one hand, the hydrophilic part makes the polymer soluble in water, and the lipophilic part covers the oil-water interface to reduce the interfacial tension and has surface activity; on the other hand, the hydrophobic groups aggregate with each other due to the hydrophobic effect, and the macromolecular chains generate intramolecular And intermolecular association, this hydrophobic association makes the apparent viscosity of polymer solution increase with molecular as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/38C08F220/56C08F220/58C08F220/06C08G18/83C09K8/588
Inventor 石元昌徐晓脍姚慧玲王颖陈辉
Owner SHANDONG UNIV
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