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The feeding process and device for the preparation of vinyl chloride and acrylate copolymer resin by bulk method

A technology of acrylate and vinyl chloride, which is applied in the field of feeding process and device for preparing vinyl chloride and acrylate copolymer resin, can solve the problems of difficult heat transfer, difficult control of reaction temperature, etc. The effect of difficult heat transfer and small investment

Inactive Publication Date: 2011-12-14
NEIJIANG YUNTONG PLASTIC AUX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the purposes of the present invention is to overcome the above-mentioned defects, and provide a bulk method for preparing vinyl chloride and acrylate copolymer resins, which can realize multi-component and orderly polymerization of vinyl chloride and acrylate monomers, and at the same time make the reaction system have a good heat dissipation effect. It solves the problems of difficult heat transfer and difficult control of the reaction temperature in the traditional bulk method, and improves the industrial application possibility of the bulk method for preparing vinyl chloride and acrylate block copolymers

Method used

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  • The feeding process and device for the preparation of vinyl chloride and acrylate copolymer resin by bulk method
  • The feeding process and device for the preparation of vinyl chloride and acrylate copolymer resin by bulk method

Examples

Experimental program
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Embodiment 1

[0043] 1. Raw materials: commercially available 5% (wt%) acrylate monomer (composed of methyl acrylate and butyl acrylate in a mass ratio of 2:1), 95% (wt%) vinyl chloride monomer.

[0044] 2. Initiator: Di(2-ethyl)hexyl peroxydicarbonate and cumyl peroxyneodecanoate are compounded at a mass ratio of 1:2, and the total mass of the initiator is 0.02% of the raw material mass.

[0045] 3. Steps

[0046] a. Put 10% (wt%) raw material weight vinyl chloride monomer into the pre-polymerization kettle first, then add initiator, and react under high-speed stirring, 40-43°C and 0.40-0.65Mpa pressure conditions to generate vinyl chloride ( VCM) prepolymerization product, when the weight-average degree of polymerization of the prepolymerization product reaches 10%, the VCM prepolymerization product is transferred to the polymerization kettle. After continuing stirring for 15 minutes at 0.65-0.70Mpa and 55-58°C in the polymerization tank, the remaining amount of vinyl chloride monomer wa...

Embodiment 2

[0052] Repeat embodiment 1 step, difference is:

[0053] Raw material composition: commercially available 15% (wt%) acrylate monomer (such as ethyl acrylate and isooctyl acrylate at a mass ratio of 1:3), 85% (wt%) vinyl chloride monomer.

[0054] Initiator composition: Di(2-ethyl)hexyl peroxydicarbonate and cumyl peroxyneodecanoate are compounded at a mass ratio of 1:1, and the total mass of the initiator is 0.04% of the raw material mass.

[0055] During the reaction, keep the pressure in the polymerization tank at 0.70-0.75Mpa and the temperature at 60-63°C.

[0056] In the first stage, acrylate monomers accounting for 20% by mass of acrylate monomers are added, in the second stage, acrylate monomers accounting for 55% of the mass of acrylate monomers are added, and in the third stage, the remaining amount of acrylate monomers is added. After the materials of the first stage and the second stage are added, the time for stirring and maintaining the heat and pressure is 30 mi...

Embodiment 3

[0061] Repeat embodiment 1 step, difference is:

[0062] Composition of raw materials: 25% (wt%) commercially available acrylate monomer (composed of butyl acrylate, isooctyl acrylate, etc., nonyl acrylate in a weight ratio of 1:1:3), 75% (wt%) Vinyl chloride monomer.

[0063] Initiator composition: Di(2-ethyl)hexyl peroxydicarbonate and cumyl peroxyneodecanoate are compounded at a mass ratio of 2:1, and the total mass of the initiator is 0.08% of the raw material mass.

[0064] After the prepolymer is transferred to the polymerization tank, keep the pressure in the polymerization tank at 0.58-0.72Mpa and the temperature at 68-70°C.

[0065] In the first stage, acrylate monomers accounting for 25% by mass of acrylate monomers are added, in the second stage, acrylate monomers accounting for 50% of the mass of acrylate monomers are added, and in the third stage, the remaining amount of acrylate monomers is added. After the materials of the first stage and the second stage are ...

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Abstract

The invention discloses a feeding process for preparing vinyl chloride and acrylate copolymer resin by bulk method, which consists of firstly adding part of vinyl chloride monomer to form a prepolymer, mixing the prepolymer with the remaining amount of vinyl chloride and performing the process in the three stages The remaining initiators are added successively to make the copolymerization reaction proceed in an orderly and controllable state, the reaction heat of the system is easy to remove, the reaction temperature is easy to control, and at the same time, the vinyl chloride and acrylic acid monomers can be quickly dispersed Uniformity, better avoid self-polymerization of monomer compounds, realize multiple orderly polymerization of vinyl chloride and acrylate monomers, and this method has low investment, simple and easy to control process, and improves the preparation of vinyl chloride and acrylate block copolymers by bulk method Possibility of industrial application of the process. The invention also provides a device capable of realizing the process, which can continuously feed materials without power and static pressure, smoothly realize continuous quantitative feeding of materials in the pressure vessel, and ensure the orderly progress of multi-component copolymerization.

Description

technical field [0001] The invention relates to vinyl chloride and acrylate copolymer resins, in particular to a feeding process and a device for preparing vinyl chloride and acrylate copolymer resins based on the principle of bulk method. Background technique [0002] Polyvinyl chloride resin is a synthetic material widely used in the world today. It is the second most used synthetic material worldwide. According to statistics, China's production capacity in 2010 exceeded 17 million tons, with an annual increase of more than 10%. However, PVC is hard, has poor plasticity, poor impact resistance and weather resistance, especially low temperature toughness, which greatly restricts the application of PVC in industry, agriculture and construction. In order to continuously expand the application range of high-impact-resistant plastics, improve processing conditions, and overcome the low-temperature brittleness and notch sensitivity of PVC resin, research on PVC toughening and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F293/00C08F214/06C08F220/14C08F220/18C08F2/02
Inventor 桂先伦欧阳远哲吴运亨
Owner NEIJIANG YUNTONG PLASTIC AUX
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