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Reaction extrusion polymerization method of functional acrylate resin

A technology of acrylates and acrylic resins, which is applied in the field of preparation of functional polymer compounds, can solve problems such as the inability to rapidly cool and terminate polymerization, the impossibility of obtaining industrialized products, and the impossibility of implementation, achieving solvent-free recovery, transparency and Excellent mechanical properties and low cost

Active Publication Date: 2015-04-29
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The plan seems reasonable, but in fact it cannot be implemented
Because the MMA monomer is pre-polymerized in the polymerization reactor, the reaction system with high viscosity cannot be cooled rapidly and the polymerization is terminated, and there is a great risk of sudden polymerization
Even if there is no sudden reunion by luck, it is impossible to obtain stable industrialized products

Method used

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  • Reaction extrusion polymerization method of functional acrylate resin
  • Reaction extrusion polymerization method of functional acrylate resin
  • Reaction extrusion polymerization method of functional acrylate resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The methyl methacrylate monomer is refined through active alumina and molecular sieves to meet the polymerization requirements of the present invention. Select polybutylacrylate pellets with 15% by mass of methyl methacrylate monomer as the modified resin, and set 3 feeding ports on the twin-screw extruder, respectively located at the first, second, and fourth screw extruders. The cylinder section is successively the feed port of pellets, the feed port of methyl methacrylate monomer, and the feed port of benzoyl peroxide initiator solution; under the feeding pump, the feed of methyl methacrylate pellets In the first section of the screw barrel, under the delivery of the metering pump, the refined monomer and initiator are respectively input into the second section and the fourth section for reaction extrusion polymerization reaction, and the structure of the number average molecular weight of 350,000 is methyl Product A of methyl acrylate homopolymer. The process condi...

Embodiment 2

[0061] A kind of reaction polymerization method of toughened polymethyl methacrylate, adopts the same processing condition of embodiment 1, polymethyl methacrylate-polybutyl methacrylate-polymethyl methacrylate nano-scale triblock The copolymer is dissolved in the methyl methacrylate monomer, and its mass ratio to the monomer is 1:8, and is fed into the extruder through the second screw barrel section, and the product B is finally obtained. The process conditions are set as follows:

[0062] The temperature of each section of the screw: 180 / 180 / 150 / 90 / 90 / 90 / 90 / 100 / 110 / 150 / 180 / 180 / 180°C; pellet feeding speed: 2.0kg / h; monomer mass flow rate: 8.0 kg / h; initiator mass flow rate: 24g / h; screw speed: 60rpm. The performance test results of product B are shown in Table 2.

[0063] Table 2

[0064]

Embodiment 3

[0066] Select high-molecular-weight polymethyl methacrylate as the modified resin, and set 4 feeding ports on the twin-screw extruder, which are respectively located in the first, second, sixth, and tenth screw barrel sections, followed by high-molecular-weight polymethyl methacrylate. Feed port for methyl acrylate and methyl methacrylate monomer, feed port for benzoyl peroxide initiator, feed port for dicumyl peroxide initiator, feed port for tert-butyl peroxybenzoate initiator Under the delivery of the metering pump, the refined monomer and initiator are input into the twin-screw extruder for reaction extrusion polymerization to obtain a methyl methacrylate homopolymer C with a number average molecular weight of 410,000.

[0067] The temperature of each section of the screw: 90 / 90 / 90 / 100 / 100 / 150 / 160 / 160 / 165 / 165 / 170 / 170 / 180°C; the mass flow rate of the monomer: 8.0kg / h; the mass flow rate of the initiator is 8g / h, 8.9g / h, 6.4g / h. Screw speed: 36 rpm. The performance test r...

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Abstract

The invention relates to a reaction extrusion polymerization method of a functional acrylate resin, which comprises the following steps: dissolving acrylate resin monomer in modified resin at certain temperature, and adding modifying monomer and nano / micro inorganic modifying material to implement extrusion polymerization directly by monomer one-step reaction, thereby obtaining the high-performance functional acrylate resin. The invention avoids losing economical efficiency for production due to overlong retention time in the resin reaction extrusion polymerization, and overcomes the defects of high tendency of flash polymerization and difficulty in stable control in the route of reaction extrusion polymerization after monomer prepolymerization in the reaction kettle. The method has the advantages of high efficiency, low energy consumption, low cost, extremely low pollution, continuous production, no need of solvent recovery, very low equipment investment and the like; and the obtained product has the advantages of excellent transparency, excellent mechanical properties, surface scratch resistance, different light scattering rates and the like.

Description

technical field [0001] The invention relates to a preparation method of a functional polymer compound, in particular to a reaction extrusion polymerization of a functionalized acrylic resin and a modification method of blending and copolymerization during the polymerization process. Background technique [0002] Acrylic resin refers to the general term for products obtained by polymerization of acrylic acid, methacrylic acid and their derivatives. Among them, methyl methacrylate is the most representative organic chemical product and the most important polymerized monomer in acrylic resin. Methyl methacrylate is a colorless volatile and flammable liquid. It is easy to self-polymerize in the air. Its molecule contains double bonds and ester methyl groups, which can undergo addition of double bonds and transesterification of methyl groups. Methyl methacrylate is mainly used as a polymerization monomer, and can also be used in coatings, emulsion resins, adhesives, polyvinyl ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/12C08L33/08C08L53/00C08F120/14C08F220/14C08K9/00C08K3/36C08K3/26C08K3/22B29C47/92B29C48/92
Inventor 郑安呐王继铭管涌李书召危大福
Owner EAST CHINA UNIV OF SCI & TECH
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