Polymer emulsion and preparation method thereof

A technology of polymer emulsion and polymer solution, which is applied in the field of polymer emulsion, can solve problems such as poor emulsification effect and poor product stability, and achieve the effects of avoiding demulsification, good stability, and saving industrial production

Active Publication Date: 2019-06-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a polymer emulsion and its preparation method in order to overcome the problem that the existing method for preparing polymer emulsion has poor emulsification effect for containing mono-olefin copolymers resulting in poor product stability

Method used

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  • Polymer emulsion and preparation method thereof
  • Polymer emulsion and preparation method thereof

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preparation example Construction

[0016] According to a first aspect of the present invention, the present invention provides a method for preparing a polymer emulsion, the method comprising an emulsification step and at least one emulsion separation step,

[0017] In the emulsification step, mixing a polymer solution containing an olefin polymer and an organic solvent with an aqueous solution containing an emulsifier, and emulsifying the obtained mixed solution to obtain an emulsion;

[0018] The step of separating and concentrating the emulsion includes successive organic solvent removal sub-steps and centrifugation sub-steps. In the organic solvent removal sub-step, the emulsion is subjected to at least one distillation to remove part of the organic solvent in the emulsion. solvent to obtain a dilute emulsion, and in the centrifugal separation sub-step, the dilute emulsion is subjected to at least one centrifugation;

[0019] The emulsifier is an anionic emulsifier.

[0020] According to the method of the ...

preparation example 1

[0083] In this preparation example, all reagents and reactors were used after anhydrous and oxygen-free treatment.

[0084] Using VCl 4 / AlEt 2 Cl catalyst system, using n-hexane as a solvent to prepare a glue solution Y1 with a concentration of 16 wt%.

[0085] After measurement, the content of structural units derived from ethylene in the ethylene-propylene copolymer is 70 mol%, the weight average molecular weight is 400,000, and the molecular weight distribution is 3.1.

preparation example 2

[0087] Using VCl 4 / AlEt 2 Cl catalyst system, using n-pentane as a solvent to prepare a glue solution Y2 with a concentration of 11wt%.

[0088] After measurement, the content of structural units derived from ethylene in the ethylene-propylene copolymer is 65 mol%, the weight average molecular weight is 360,000, and the molecular weight distribution is 3.3.

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Abstract

The present invention relates to the field of polymer emulsions, and discloses a polymer emulsion and a preparation method thereof, wherein the preparation method comprises: emulsifying, and at leastcarrying out one emulsifying liquid separation and concentration. According to the method, in the emulsifying step, a polymer solution containing an olefin polymer and an organic solvent and an aqueous solution containing an emulsifying agent are mixed, and the mixed solution is emulsified; the emulsifying liquid separation and concentration step sequentially comprises: an organic solvent removalsub-step and a centrifugal separation sub-step; the emulsifying liquid is subjected to at least one distillation, and the diluted emulsion is subjected to at least one centrifugation; and the emulsifying agent is an anion type emulsifying agent. According to the present invention, with the method, the high polymer content polymer emulsion is obtained, and the product has good stability.

Description

technical field [0001] The invention relates to a method for preparing a polymer emulsion, in particular to a method for preparing a polymer emulsion and a polymer emulsion prepared by the method. Background technique [0002] Synthetic polymer emulsions can be used to manufacture adhesives, paints, coatings, fabrics, etc., and are widely used in various fields related to daily life such as construction, papermaking, leather, medical and health care, etc. Compared with natural latex, the production of synthetic polymer emulsion is more flexible and controllable, and the product grades are more abundant, which can meet the needs of different fields and products. [0003] CN100369938C discloses an emulsion polymer and the formation of a first emulsion polymer by free radical polymerization of at least one first ethylenically unsaturated monomer, and subsequent use of a colloid stabilizer, at least one second ethylenically unsaturated Process for preparing the emulsion polymer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/16C08F210/06C08F210/14C08F6/10C08L23/08
Inventor 谭金枚王超董新民张杰辛益双
Owner CHINA PETROLEUM & CHEM CORP
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