Preparation method and device of styrene-acrylic resin

Abstract

The invention relates to a preparation method of styrene-acrylic resin, which comprises the following steps: a styrene monomer, an acrylic acid monomer, a chain transfer agent and an initiator are completely and uniformly mixed to obtain a mixed material liquid; secondly, the mixed material liquid is subjected to oxygen expelling and cooling; thirdly, the mixed material liquid is guided into an illumination reaction chamber and subjected to light irradiation, and blocky styrene-acrylic resin is obtained; and finally, the blocky styrene-acrylic resin is granulated to prepare a styrene-acrylic resin finished product. According to the method for preparing the styrene-acrylic resin through irradiation bulk polymerization, compared with raw materials prepared through a solvent method, the problem of solvent residues cannot occur, and the prepared styrene-acrylic resin product is pure, mild and controllable in synthesis process, high in yield and simple in synthesis process; besides, the invention also provides a device for preparing the styrene-acrylic resin, and the device is characterized in that a feed liquid bearing unit is arranged on a belt conveyor, and the conveying structure forms a continuous production mode, so that the preparation cost of the product is reduced.

Description

technical field

[0001] The invention relates to the technical field of preparation of styrene-acrylic resin, in particular to a preparation method and device of styrene-acrylic resin. Background technique

[0002] Styrene-acrylic resin is a copolymer of styrene-acrylic acid and its esters. This high polymer can dissolve or swell in water, or form a highly uniformly dispersed dispersion. It usually has the characteristics of low molecular weight (Mn=2000~9000), narrow molecular weight distribution, and acid value ≥200. Styrene-acrylic resin is a very important class of water-based polymers, usually with good wear resistance, chemical resistance, weather resistance and mechanical properties, and is currently widely used in inks, coatings, papermaking sewage treatment, medicine, food , cosmetics and other fields.

[0003] Traditional styrene-acrylic resins are mainly liquid products based on solution polymerization and emulsion polymerization. Although solution polymerization...

Examples

preparation example Construction

[0021] The object of the present invention is to find a method and device for preparing styrene-acrylic resin with a mild and controllable synthesis process, simple synthesis process and pure product, and provides a method for preparing styrene-acrylic resin, comprising the following steps: S1, making styrene The monomer, acrylic monomer, chain transfer agent and initiator are fully mixed uniformly, and the equipment used in the process of mixing materials is preferably a mixing tank to obtain a mixed material liquid; S2, performing the mixed material liquid in step S1 Oxygen removal and cooling, that is: carrying out the oxygen removal project on the material in the mixing tank and cooling the material liquid at the same time, further, in step S2, the temperature of the mixed material liquid after cooling is controlled at ≤ 50 ° C, and the temperature of the driving In the process of oxygen, nitrogen is preferably passed into the mixed material liquid to drive oxygen; S3, the ...

Embodiment 1

[0027] First, 100 parts by mass of styrene, 23 parts of acrylic acid, 2 parts of ethyl acrylate, 0.25 parts of AMSD and 0.3 parts of benzoyl peroxide were dissolved, fully mixed evenly, and a mixed material liquid was obtained; Next, pass nitrogen gas into the mixture liquid and lower the temperature. The time for the nitrogen gas to drive oxygen is more than 25 minutes. After cooling down, the temperature of the mixture liquid is controlled at 30° C.; Fill nitrogen to drive oxygen, and control the temperature at 30°C; again, introduce the mixture solution after oxygen drive and cooling into the light reaction chamber, apply ultraviolet light irradiation, and continuously adjust the nitrogen flow rate into the light reaction chamber , make it keep a constant temperature of 30° C., and irradiate for 14 hours to obtain block styrene-acrylic resin; finally, crush and sieve the block styrene-acrylic resin to prepare the finished styrene-acrylic resin. After testing, the finished p...

Embodiment 2

[0029]First, 100 parts of styrene, 25 parts of acrylic acid, 1 part of butyl acrylate, 2 parts of methyl acrylate, 0.5 parts of AMSD and 0.02 parts of azobisisobutyronitrile were fully dissolved, Mix evenly to obtain a mixed material liquid; secondly, pass nitrogen gas into the mixed material liquid and lower the temperature, the time for the nitrogen gas to drive oxygen is more than 20 minutes, and control the temperature of the mixed material liquid at 35 °C after cooling; at the same time , filling nitrogen into the light reaction chamber to drive oxygen, and controlling the temperature at 35° C.; again, introducing the mixture solution after oxygen drive and cooling into the light reaction chamber, and applying pulsed strong light irradiation for 12 hours. Obtain block-shaped styrene-acrylic resin; finally, crush and sieve the block-shaped styrene-acrylic resin to prepare the finished styrene-acrylic resin. After testing, the finished product does not contain organic solve...

technical field

[0001] The invention relates to the technical field of preparation of styrene-acrylic resin, in particular to a preparation method and device of styrene-acrylic resin. Background technique

[0002] Styrene-acrylic resin is a copolymer of styrene-acrylic acid and its esters. This high polymer can dissolve or swell in water, or form a highly uniformly dispersed dispersion. It usually has the characteristics of low molecular weight (Mn=2000~9000), narrow molecular weight distribution, and acid value ≥200. Styrene-acrylic resin is a very important class of water-based polymers, usually with good wear resistance, chemical resistance, weather resistance and mechanical properties, and is currently widely used in inks, coatings, papermaking sewage treatment, medicine, food , cosmetics and other fields.

[0003] Traditional styrene-acrylic resins are mainly liquid products based on solution polymerization and emulsion polymerization. Although solution polymerization...

Examples

preparation example Construction

[0021] The object of the present invention is to find a method and device for preparing styrene-acrylic resin with a mild and controllable synthesis process, simple synthesis process and pure product, and provides a method for preparing styrene-acrylic resin, comprising the following steps: S1, making styrene The monomer, acrylic monomer, chain transfer agent and initiator are fully mixed uniformly, and the equipment used in the process of mixing materials is preferably a mixing tank to obtain a mixed material liquid; S2, performing the mixed material liquid in step S1 Oxygen removal and cooling, that is: carrying out the oxygen removal project on the material in the mixing tank and cooling the material liquid at the same time, further, in step S2, the temperature of the mixed material liquid after cooling is controlled at ≤ 50 ° C, and the temperature of the driving In the process of oxygen, nitrogen is preferably passed into the mixed material liquid to drive oxygen; S3, the ...

Embodiment 1

[0027] First, 100 parts by mass of styrene, 23 parts of acrylic acid, 2 parts of ethyl acrylate, 0.25 parts of AMSD and 0.3 parts of benzoyl peroxide were dissolved, fully mixed evenly, and a mixed material liquid was obtained; Next, pass nitrogen gas into the mixture liquid and lower the temperature. The time for the nitrogen gas to drive oxygen is more than 25 minutes. After cooling down, the temperature of the mixture liquid is controlled at 30° C.; Fill nitrogen to drive oxygen, and control the temperature at 30°C; again, introduce the mixture solution after oxygen drive and cooling into the light reaction chamber, apply ultraviolet light irradiation, and continuously adjust the nitrogen flow rate into the light reaction chamber , make it keep a constant temperature of 30° C., and irradiate for 14 hours to obtain block styrene-acrylic resin; finally, crush and sieve the block styrene-acrylic resin to prepare the finished styrene-acrylic resin. After testing, the finished p...

Embodiment 2

[0029]First, 100 parts of styrene, 25 parts of acrylic acid, 1 part of butyl acrylate, 2 parts of methyl acrylate, 0.5 parts of AMSD and 0.02 parts of azobisisobutyronitrile were fully dissolved, Mix evenly to obtain a mixed material liquid; secondly, pass nitrogen gas into the mixed material liquid and lower the temperature, the time for the nitrogen gas to drive oxygen is more than 20 minutes, and control the temperature of the mixed material liquid at 35 °C after cooling; at the same time , filling nitrogen into the light reaction chamber to drive oxygen, and controlling the temperature at 35° C.; again, introducing the mixture solution after oxygen drive and cooling into the light reaction chamber, and applying pulsed strong light irradiation for 12 hours. Obtain block-shaped styrene-acrylic resin; finally, crush and sieve the block-shaped styrene-acrylic resin to prepare the finished styrene-acrylic resin. After testing, the finished product does not contain organic solve...

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