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A kind of polymer emulsion that can be flocculated by CO2 gas and its preparation and flocculation method

A technology for copolymerizing emulsions and emulsions, which is applied in the fields of materials and fine chemicals to achieve the effects of low environmental pollution, low energy consumption, and simple processes

Active Publication Date: 2019-06-11
LESCENT CHINA ADVANCED MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method simply and efficiently solves many problems existing in the preparation of polymer powder from polymer emulsion. It not only has a simple process, but also has significant characteristics such as low cost, low energy consumption and low environmental pollution

Method used

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  • A kind of polymer emulsion that can be flocculated by CO2 gas and its preparation and flocculation method
  • A kind of polymer emulsion that can be flocculated by CO2 gas and its preparation and flocculation method
  • A kind of polymer emulsion that can be flocculated by CO2 gas and its preparation and flocculation method

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preparation example Construction

[0033] The present invention proposes a method for preparing a polymer emulsion with a core-shell structure, characterized in that the preparation method comprises the following two steps:

[0034] (a) Preparation of seed emulsion: The free radical polymerizable monomer is carried out emulsion copolymerization in the presence of anionic emulsifier or composite emulsifier, crosslinking agent, initiator, deionized water and auxiliary agent to obtain polymer Seed lotion.

[0035] The amount of free radical polymerizable monomers used to prepare the seed emulsion accounts for 95-5wt% of the total amount of free radical polymerized monomers used to prepare the core-shell structure polymer emulsion; 0-10wt% of the monomer consumption of radical polymerization, preferably 0.05-5%; the initiator consumption is 0.05-5wt% of the monomer consumption that can carry out radical polymerization of the preparation seed emulsion, preferably 0.2-2wt%; emulsifier consumption 0-5wt%, preferably ...

Embodiment 1

[0043] Embodiment 1—poly(methyl methacrylate-butadiene-styrene) emulsion system—preparation of MBS resin

[0044] The following table is the synthetic formula of polymer emulsion:

[0045]

[0046] According to the formula in the table, weigh 320 parts of styrene, 8 parts of acrylic acid, 10 parts of methacrylic acid, 12 parts of sodium dodecyl diphenyl ether disulfonate, 5 parts of ammonium persulfate, 0.42 parts of tert-dodecyl Mercaptan, 600 parts of water, 5 parts of divinylbenzene and 7.1 parts of potassium chloride were put into the autoclave, and nitrogen gas was passed for 10 minutes, and then 210 parts of butadiene were introduced into the autoclave from the cylinder. First, pre-emulsify the raw material system in the kettle at 25°C for 1 hour, then raise the temperature to 50°C, react for 7 hours, then raise the temperature to 63°C, and react for another 2 hours. The measured solid content reaches more than 45%, and the monomer conversion rate is 95%. More than %...

Embodiment 2

[0049] Embodiment 2—poly(methyl methacrylate-butadiene-styrene) emulsion system—preparation of MBS resin

[0050] The following table is the synthetic formula of polymer emulsion:

[0051]

[0052] According to the formula in the table, weigh 300 parts of styrene, 8 parts of acrylic acid, 6 parts of methacrylic acid, 7 parts of sodium lauryl sulfate, 3 parts of cumene hydroperoxide, 1 part of ferrous sulfate, and 1 part of glucose 0.3 parts of n-dodecyl mercaptan, 5 parts of ethylene glycol dimethacrylate, 10.1 parts of sodium chloride and 450 parts of water are put into the autoclave, and nitrogen gas is passed for 10 minutes, and then 180 parts of butadiene are discharged from the cylinder into the reactor. First, pre-emulsify the raw material system in the kettle at 35°C for 1.5 hours, then raise the temperature to 60°C, react for 5 hours, then raise the temperature to 75°C, and react for another hour. The measured solid content reaches more than 45%, and the monomer co...

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Abstract

The invention relates to polymer emulsion capable of being flocculated by CO2 gas, a preparation method and a flocculation method, and belongs to the field of material and fine chemical engineering. The polymer emulsion comprises a monomer capable of performing free radical polymerization, an anionic emolsifier or negion-non-iron compound emulsifier, a crosslinking agent, an initiator, deionized water and an assistant and is characterized by further comprising polymer emulsion that is prepared by adding a protonated amino-containing functional monomer into the polymer emulsion and performing polymer emulsion copolymerization and has a core-shell structure, or compound polymer emulsion that is prepared by directly and physically mixing the polymer emulsion and the protonated amino-containing functional monomer. The polymer emulsion can be demulsified to achieve separation of a polymer and water only by admitting the CO2 gas without adding electrolytes such as acid, alkali and salt, and then granular polymer powder can be obtained by filtering, or centrifugal separation, drying and the like. The polymer emulsion and the methods have the advantages of simple technology, high efficiency, low energy consumption, small environmental pollution and the like.

Description

technical field [0001] The invention relates to a polymer emulsion and its use of CO 2 The method for gas flocculation belongs to the field of materials and fine chemicals. Background technique [0002] Polymer emulsion refers to a dispersion system in which a polymer as a dispersed phase is uniformly dispersed in water as a continuous phase. Compared with other polymerization methods, since the emulsion polymerization uses water as the dispersion medium, it is easy to dissipate heat, the production is safe, the polymerization rate is fast, high molecular weight latex particles can be obtained, and the operation is convenient and the production cost is low. With in-depth and systematic research, the research and application of polymer emulsions have also been greatly developed, with more varieties and more and more application fields. [0003] Traditional polymer emulsions have become irreplaceable raw materials in the fields of water-based paints, water-based adhesives, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F257/02C08F279/06C08F279/02C08F220/14C08F220/34C08F212/08C08F2/26C08F2/30C08F6/22C08K5/17C08L51/04C08J3/16
CPCC08F2/26C08F2/30C08F6/22C08F257/02C08F279/02C08F279/06C08J3/16C08J2351/04C08K5/17C08F220/14C08L51/04
Inventor 孙剑武江一明陈卓雄阚成友
Owner LESCENT CHINA ADVANCED MATERIALS CO LTD
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