Supercharge Your Innovation With Domain-Expert AI Agents!

Maleic anhydride/vinyl acetate/styrene/alpha-methylstyrene copolymer microsphere as well as preparation method and application thereof

A technology of vinyl acetate and methyl styrene, applied in the field of polymer polymerization, can solve the problems of adding heat-resistant modifiers, and achieve the effect of improving heat-resistant performance and excellent dispersibility

Active Publication Date: 2021-04-27
CHINA PETROLEUM & CHEM CORP +1
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the prior art, it is not mentioned that the copolymer containing maleic anhydride can be added to polymer systems such as polyolefin as a heat-resistant modifier

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Maleic anhydride/vinyl acetate/styrene/alpha-methylstyrene copolymer microsphere as well as preparation method and application thereof
  • Maleic anhydride/vinyl acetate/styrene/alpha-methylstyrene copolymer microsphere as well as preparation method and application thereof
  • Maleic anhydride/vinyl acetate/styrene/alpha-methylstyrene copolymer microsphere as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] The second aspect of the present invention provides a kind of preparation method of maleic anhydride / vinyl acetate / styrene / α-methylstyrene copolymer microsphere, described method comprises the following steps:

[0035] (1) In an inert atmosphere, the polymerization monomer and the initiator are dissolved in an organic solvent to form a homogeneous solution;

[0036] (2) After the homogeneous solution is subjected to a polymerization reaction to obtain a copolymer emulsion suspension, centrifugal separation is performed to obtain the maleic anhydride / vinyl acetate / styrene / α-methylstyrene copolymer microspheres;

[0037] Wherein, the polymerized monomer is comonomer I, comonomer II, comonomer III and comonomer IV;

[0038] The comonomers I-IV have structures shown in formula (5)-formula (8) respectively

[0039]

[0040] In the present invention, the method of copolymerization is adopted to carry out copolymerization of specific comonomers according to the method prov...

Embodiment 1

[0080] Add 10g of comonomer I, 1g of azobisisobutyronitrile, 5.9g of comonomer IV, 2.15g of comonomer II, 2.6g of comonomer III and 87.8g of isoamyl acetate into a 500mL three-necked flask, and mix the materials After uniformity, pass nitrogen gas for 20 minutes, move the three-necked flask into a 70°C water bath, 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 polymer microspheres. A1 is 14.57g, corresponding to a polymer yield of 71.2%. The particle size of the polymer microspheres is 1200 nm.

[0081] The polymer microsphere A1 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 the structural unit shown in the formula (1) is 48%, and the molar content of the structural unit described in the formula (2) is 15%, The molar content of the structural unit of formula (3) is 15%...

Embodiment 2

[0085] Add 9.6g comonomer I, 0.8g azobisisobutyronitrile, 7.08g comonomer IV, 1.72g comonomer II, 2.08g comonomer III and 88g butyl butyrate into a 500mL three-necked flask, and the material After mixing evenly, blow nitrogen gas for 20 minutes, move the three-necked flask into a 60°C water bath, and react for 24 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 polymer microparticles. Ball A2 was 14.63 g, corresponding to a polymer yield of 70.7%. The particle size of the polymer microspheres is 1500 nm. The obtained polymer is a tetrapolymer of maleic anhydride, styrene, alpha-methylstyrene and vinyl acetate, and the molar content of maleic anhydride in the copolymer is 50%.

[0086] The polymer microsphere A2 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 structural unit shown in...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of high-molecular polymerization, and discloses a maleic anhydride / vinyl acetate / styrene / alpha-methylstyrene copolymer microsphere. A copolymer in the copolymer microsphere comprises a structural unit as shown in a formula (1), a structural unit as shown in a formula (2), a structural unit as shown in a formula (3) and a structural unit as shown in a formula (4). Based on the total molar weight of all structural units of the copolymer, the molar content of the structural unit shown in the formula (1) is 47-50%, the molar content of the structural unit shown in the formula (2) is 10-15%, the molar content of the structural unit shown in the formula (3) is 10-15%, and the molar content of the structural unit in the formula (4) is 18-32%. The copolymer microsphere has the advantages of uniform particle size, clean particle surface and simple preparation process, and can be used as a heat-resistant modifier for polymers, especially polypropylene, so as to improve the heat resistance of the polymers.

Description

technical field [0001] The invention relates to the field of polymer polymerization, in particular to a maleic anhydride / vinyl acetate / styrene / α-methylstyrene copolymer microsphere and a preparation method and application thereof. Background technique [0002] Copolymers containing maleic anhydride are mostly prepared by solution or conventional 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 and others synthesized styrene-maleic anhydride copolymers by precipitation polymerization in toluene. [0004] In "Sy...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08F222/08C08F218/08C08F212/08C08F212/12C08F2/06C08L23/12C08L35/06
CPCC08F222/08C08F2/06C08L23/12C08L2201/08C08F218/08C08F212/08C08F212/12C08L35/06
Inventor 张洁刘振杰宋文波邵清
Owner CHINA PETROLEUM & CHEM CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com