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Method for preparing chloroethylene-n-butyl acrylate copolymer resin with suspension process

A technology of n-butyl acrylate copolymer resin and vinyl chloride, which is applied in the field of chemical polymer synthesis, can solve the problems of inability to achieve continuous industrial production of copolymer resin, inability to quickly and stably adjust the corresponding formula, and uneven polymer molecular weight distribution. To achieve the effect of simple, stable and easy to control, high degree of device automation, easy to industrial scale production

Inactive Publication Date: 2017-01-04
YIBIN HAIFENG HERUI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Chinese patent CN104250334A is a vinyl chloride-acrylic ester copolymer and its preparation method, which reports the copolymerization of vinyl chloride and acrylic ester monomers, and has done a relatively in-depth study on the addition of acrylic ester monomers, but it only stays in the In the laboratory stage, it is impossible to achieve continuous industrial production and obtain a relatively uniform copolymer resin
[0008] In the patent CN103814051A based on vinyl chloride copolymer resin and its preparation method, a preparation method of vinyl chloride-acrylate copolymer with core-shell structure is provided, but its two-step polymerization method is cumbersome and difficult to operate; The "suspension stabilizer" has been prepared in advance, and it cannot be quickly stabilized. In the actual industrial production process, the corresponding formula should be adjusted in advance according to the polymerization reaction.
[0009] Although the industrialized production of literature vinyl chloride-butyl acrylate copolymer resin has reported the use of 7m 3 The device is conducting trial production of vinyl chloride-butyl acrylate copolymer resin, but its formula and related control parameters are not specified. At the same time, adjusting and controlling the temperature during the polymerization reaction will cause uneven molecular weight distribution of the polymer and cause molecular chain defects. Thereby affecting the quality of the copolymer resin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] After the polymerization kettle is clean and ready to use, the whole process of closed feeding and isothermal water feeding technology is adopted. DCS program control automatically adds 130 parts of isothermal pure water, 100 parts of vinyl chloride monomer, and 0.07 parts of dispersant. Among them, hydroxypropyl methylcellulose , polyvinyl alcohol with a degree of alcoholysis of 79 to 81, polyvinyl alcohol with a degree of alcoholysis of 71.5 to 73.5, and a mass ratio of polyvinyl alcohol with a degree of alcoholysis of 45 to 51 is 1:6.6:3.8:1.3, and the initiator A0 .09 parts (the mass ratio of EHP to CNP is 2.5:1), when the polymerization feed is completed, the polymerization temperature of 57°C is reached; water injection is started after the polymerization reaction starts, and n-butyl acrylate 3.0 part; 0.003 part of initiator B (cumyl peroxynedecanoate CNP) was added when the polymerization reaction was 90 minutes; under the action of stirring and cooling water, th...

Embodiment 2

[0026] After the polymerization kettle is clean and available, adopt the whole-process closed feeding and isothermal water feeding technology, DCS program control to automatically add 130 parts of isothermal pure water, 100 parts of vinyl chloride monomer, and 0.07 parts of dispersant, of which hydroxypropyl methylcellulose, The mass ratio of polyvinyl alcohol with a degree of alcoholysis of 79 to 81, polyvinyl alcohol with a degree of alcoholysis of 71.5 to 73.5, and polyvinyl alcohol with a degree of alcoholysis of 45 to 51 is 1:6.6:3.8:1.3, and the initiator A0. 09 parts (the mass ratio of EHP to CNP is 2.5:1), when the polymerization feed is completed, the polymerization temperature reaches 57°C; water injection is started after the polymerization reaction starts, and 5.0 parts of n-butyl acrylate is continuously added at a constant speed within 180 minutes of the polymerization reaction ; Add 0.005 parts of initiator B (CNP) at 90 minutes of polymerization reaction; under ...

Embodiment 3

[0028] After the polymerization kettle is clean and available, adopt the whole-process closed feeding and isothermal water feeding technology, and DCS program control automatically adds 130 parts of isothermal pure water, 100 parts of vinyl chloride monomer, and 0.09 parts of dispersant, of which hydroxypropyl methylcellulose, The mass ratio of polyvinyl alcohol with a degree of alcoholysis of 79 to 81, polyvinyl alcohol with a degree of alcoholysis of 71.5 to 73.5, and polyvinyl alcohol with a degree of alcoholysis of 45 to 51 is 1:6.6:3.2:1.1, and the initiator A0. 1 part (the mass ratio of EHP to CNP is 2.5:1), when the polymerization feed is completed, the polymerization temperature will reach 57°C; water injection will start after the polymerization reaction starts, and 5.0 parts of n-butyl acrylate will be added continuously at a uniform speed within 180 minutes from the start of the polymerization reaction ; Add 0.005 parts of initiator B (CNP) at 90 minutes of polymeriz...

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Abstract

The invention provides a preparation method of chloroethylene-n-butyl acrylate copolymer resin with a suspension process and belongs to the technical field of chemical polymer synthesis. The suspension polymerization process is adopted, and a polymerization formula is adjusted and optimized, and the n-butyl acrylate copolymer adding technology is controlled, therefore, the prepared chloroethylene-n-butyl acrylate copolymer resin product has the advantages of regular shape, concentrated size distribution, higher apparent density and lower oil absorption rate, is transparent and presents remarkable internal plasticity and impact resistance.

Description

[0001] Technical field: [0002] The invention relates to a method for preparing vinyl chloride-n-butyl acrylate copolymer resin with internal plasticization by a suspension method, and belongs to the technical field of chemical polymer synthesis. Background technique [0003] Polyvinyl chloride (PVC) is widely used in various fields of people's life because of its excellent comprehensive mechanical properties, flame retardancy, chemical resistance and low price. However, the disadvantages of general-purpose resins such as high brittleness, poor impact resistance, and low strength have seriously restricted the development of polyvinyl chloride resins in specific fields such as impact modification and flexible soft products. [0004] Usually, blending and toughening polyvinyl chloride resin is used, or low-molecular compound plasticization is used to prepare a soft polyvinyl chloride resin that can make up for the brittleness of general-purpose resins, has both flexibility and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F214/06C08F220/18C08F2/20C08F2/42
CPCC08F2/20C08F2/42C08F214/06C08F220/1804
Inventor 全小辉罗小芳何伟何胜任康兵
Owner YIBIN HAIFENG HERUI
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