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Suspension polymerization dispersing agent and application thereof

A suspension polymerization and dispersant technology, which is applied in the field of suspension polymerization dispersants, can solve the problems of metal sodium ion residues and adverse effects on the soil environment, etc., and achieve the effect of easy availability of raw materials, strong practical value, and cheap raw materials

Active Publication Date: 2014-07-09
BOLIER CHEM YANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In "Suspension Polymerization" edited by Pan Zuren, it is mentioned that the sodium salt of polyacrylic acid and polymethacrylic acid can be used as a synthetic polymer dispersant, and Chinese patent CN102030849A also mentions that the sodium salt of polyacrylic acid and polymethacrylic acid can be used as a suspension polymerization dispersant However, the discharge of polyacrylic acid and polymethacrylic acid sodium salt will produce metal sodium ion residues, which will have an adverse impact on the soil environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Take 20g of ammonium polymethacrylate aqueous solution with a solid content of 10% and a rotational viscosity of 500mPa.s at 25°C, and dissolve 0.003g of polyvinyl alcohol with an alcoholysis degree of 80% in 30g of hot water at 80°C; Add the above-mentioned main dispersant aqueous solution and auxiliary dispersant aqueous solution into a 5000mL three-neck flask filled with 3000mL deionized water, raise the temperature to 50°C, stir to mix evenly (about 20 minutes), and obtain the suspension polymerization dispersant of the present invention; Apply the prepared suspension polymerization dispersant to the polymerization system (300g methyl methacrylate, 700g styrene and an appropriate amount of initiator and regulator), and carry out the polymerization reaction according to the suspension polymerization process; after the polymerization reaction is completed, wash and dry , sieving; the copolymer product of gained methyl methacrylate (30%) and styrene (70%) passes through...

Embodiment 2

[0017] Take 120g of polyammonium methacrylate aqueous solution with a solid content of 5% and a rotational viscosity of 230mPa.s at 25°C, and dissolve 0.02g of polyvinyl alcohol with an alcoholysis degree of 85% in 20g of hot water at 85°C; Add the main dispersant aqueous solution and auxiliary dispersant aqueous solution into a 5000mL three-necked flask filled with 3000mL deionized water, raise the temperature to 50°C, stir to mix evenly (about 20 minutes), and obtain the suspension polymerization dispersant of the present invention; The prepared suspension polymerization dispersant is used in the polymerization system (300g methyl methacrylate, 700g n-butyl methacrylate and an appropriate amount of initiator and regulator), and the polymerization reaction is carried out according to the suspension polymerization process; after the polymerization reaction is completed, carry out Washing, drying, sieving; the copolymer product of gained methyl methacrylate (30%) and n-butyl met...

Embodiment 3

[0019] Take 500g of an aqueous solution of polyammonium methacrylate with a solid content of 2% and a rotational viscosity of 60mPa.s at 25°C; in addition, dissolve 0.04g of polyvinyl alcohol with an alcoholysis degree of 85% in 50g of hot water at 70°C; Add the main dispersant aqueous solution and auxiliary dispersant aqueous solution into a 5000mL three-necked flask filled with 3000mL deionized water, raise the temperature to 50°C, stir to mix evenly (about 20 minutes), and obtain the suspension polymerization dispersant of the present invention; The prepared suspension polymerization dispersant is used in the polymerization system (1000g methyl methacrylate and an appropriate amount of initiator and regulator), and the polymerization reaction is carried out according to the suspension polymerization process; after the polymerization reaction is completed, washing, drying, and screening are carried out; the obtained The passing rate of polymethyl methacrylate product through ...

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Abstract

The invention discloses a suspension polymerization dispersing agent and an application of the polymerization dispersing agent. The polymerization dispersing agent consists of main dispersing agent ammonium polymethacrylate and auxiliary dispersing agent polyvinyl alcohol, can be used in the suspension polymerization reaction with the participation of optional one or more selected from monomers consisting of acrylate, methacrylate, styrene, vinyl acetate, chloroethylene and the like. The suspension polymerization dispersing agent provided by the invention not only is environment-friendly but also can prepare the polymer with particle size within the range of 50microns to 1000microns by controlling the addition amount, in addition, the dispersing agent is convenient to use, low in raw material cost, easy-to-get in material, low in cost, is suitable for industrial production, and has extremely high application value.

Description

technical field [0001] The invention relates to a suspension polymerization dispersant and its application, belonging to the technical field of polymer polymerization. Background technique [0002] Suspension polymerization is a polymerization method in which monomers are suspended in water in the form of small droplets. Initiator is dissolved in the monomer, and a small droplet is equivalent to a small bulk polymerization unit. From the monomer droplet to the polymer solid particle, it passes through the polymer-monomer sticky particle stage in the middle. In order to prevent the particles from sticking together, it is necessary to add a dispersant to form a protective film on the surface of the particle. The amount of dispersant is related to the selection of polymerized monomer and dispersant, and the amount used is 0.05-30% of the monomer mass. In "Suspension Polymerization" edited by Pan Zuren, it is mentioned that the sodium salt of polyacrylic acid and polymethacryl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F20/10C08F12/08C08F18/08C08F14/06C08F2/20
Inventor 张海泉吴建军姜笃兵周金林
Owner BOLIER CHEM YANGZHOU