Terpolymer microspheres as well as preparation method and application thereof

A technology of terpolymers and copolymers, which is applied in the field of terpolymer microspheres and its preparation, and can solve problems such as easy agglomeration, film surface properties and printing effects, affecting the quality of polyolefin film products and product qualification rate, etc. , to achieve the effect of improving the opening performance

Active Publication Date: 2021-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The adhesion phenomenon between polyolefin films greatly affects the finished product quality and product qualification rate of polyolefin films
[0008] Inorganic anti-blocking agents usually have poor compatibility with polymers, and there are problems of easy agglomeration and difficulty in dispersing during processing
The addition of slip agents such as oleic acid amide and other antistatic agents will have a negative impact on the surface properties and printing of the film

Method used

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  • Terpolymer microspheres as well as preparation method and application thereof
  • Terpolymer microspheres as well as preparation method and application thereof

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preparation example Construction

[0024] The first aspect of the present invention provides a method for preparing terpolymer microspheres, wherein the method comprises the following steps:

[0025] (1) In an inert atmosphere, the polymerization monomer and the initiator are dissolved in an organic medium to form a homogeneous solution;

[0026] (2) After the homogeneous solution is subjected to a polymerization reaction to obtain a copolymer emulsion suspension, centrifugal separation is performed to obtain the terpolymer microspheres;

[0027] Wherein, the polymerized monomers are maleic anhydride, styrene and α-methylstyrene; based on the total substance amount of the polymerized monomers, the molar content of maleic anhydride is 48-51%;

[0028] The molar ratio of styrene to α-methylstyrene is 9:1-1:9.

[0029] In the present invention, in the presence of an organic medium, maleic anhydride, α-methylstyrene and styrene are copolymerized according to the method defined in the present invention by means of ...

Embodiment 1

[0066] Add 11g of maleic anhydride, 0.6g of azobisisobutyronitrile, 10.62g of α-methylstyrene, 1.04g of styrene and 87.8g of isoamyl acetate into a 500mL three-necked flask. Minutes, move the three-necked flask into a water bath at 60°C, and react for 5 hours. After the reaction is completed, the obtained polymer emulsion suspension is centrifuged at a speed of 2000 rad / min for 20 minutes to obtain 11.04 g of polymer solid A1, corresponding to polymerization The yield is 51.4%. The particle size of the polymer microspheres is 1200 nm. Wherein, the molar ratio of styrene to α-methylstyrene is 1:9.

[0067] The polymer microsphere A1 was carried out 1 H NMR is measured, records and is based on the total molar weight of each structural unit in polymer, and the molar content of maleic anhydride structural unit is 50%, and the molar content of styrene structural unit is 10%, and the molar content of α-methylstyrene structural unit The molar content is 40%.

[0068] Such as fig...

Embodiment 2

[0071] Add 10g of maleic anhydride, 0.89g of azobisisobutyronitrile, 9.44g of α-methylstyrene, 2.08g of styrene and 87.8g of butyl butyrate into a 500mL three-necked flask, mix the materials uniformly, and blow nitrogen for 20 minutes , moved the three-neck flask into a 70°C water bath, and reacted for 5 hours. After the reaction was completed, the obtained polymer emulsion suspension was centrifuged at a speed of 2000 rad / min for 20 minutes to obtain 11.72 g of polymer solid A2, corresponding to the polymer yield. Rate 55.0%. The particle size of the polymer microspheres is 1500 nm. Wherein, the molar ratio of styrene to α-methylstyrene is 2:8.

[0072] The polymer microsphere A2 was carried out 1 H NMR measures, and records based on the total molar weight of each structural unit in the polymer, the molar content of maleic anhydride structural unit is 48%, the molar content of styrene structural unit is 12%, the molar content of α-methylstyrene structural unit The molar co...

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Abstract

The invention relates to the field of polymer microsphere preparation, and discloses a terpolymer microsphere preparation method, which comprises: (1) dissolving a polymerization monomer and an initiator in a reaction medium in an inert atmosphere to form a homogeneous solution; (2) carrying out polymerization reaction on the homogeneous solution to obtain a copolymer emulsion suspension, and carrying out centrifugal separation to obtain the terpolymer microspheres, wherein the polymeric monomers are maleic anhydride, styrene and alpha-methyl styrene; wherein the molar content of maleic anhydride is 48-51% based on the total amount of substances of the polymeric monomer; wherein the molar ratio of styrene to alpha methyl styrene is 9: 1-1: 9. The copolymer microsphere provided by the invention is clean and pollution-free in surface and uniform in microsphere particle, the content of maleic anhydride in the copolymer and the yield of a product are remarkably increased, and the copolymer microsphere is used as an anti-blocking agent for a polyolefin film, so that the anti-blocking performance of the polyolefin film can be remarkably improved.

Description

technical field [0001] The invention relates to the field of polymer synthesis, in particular to a terpolymer microsphere and its preparation method and application. Background technique [0002] In the prior art, copolymers containing maleic anhydride are mostly prepared by solution or traditional precipitation polymerization. In the article "Research on Copolymerization of Styrene-Maleic Anhydride in Different Solvents", Shen Rong et al. reacted maleic anhydride and styrene in ethyl acetate and N,N-dimethylformamide, and passed ethanol after the reaction was completed. A polymer of maleic anhydride and styrene was prepared as a precipitant (Journal of Wuhan Engineering University, 2019, 41(1):65-68). [0003] In "Synthesis of Low Molecular Weight Styrene-Maleic Anhydride Alternating Copolymers", Liu Tingguo et al. used precipitation polymerization to synthesize styrene-maleic anhydride copolymers in toluene. [0004] Shi Xuelong et al. used the green solvent dimethyl car...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F222/08C08F212/08C08F212/12C08L23/08C08L35/06C08J5/18
CPCC08F222/08C08J5/18C08J2323/08C08J2435/06C08F212/08C08F212/12
Inventor 刘振杰张洁宋文波胡慧杰
Owner CHINA PETROLEUM & CHEM CORP
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