Supercharge Your Innovation With Domain-Expert AI Agents!

Method for preparing polyethylene-polyvinyl acetate elastomer soap-free microemulsion

A polyvinyl acetate and vinyl acetate technology, applied in the field of preparing EVA elastomer microemulsion, can solve the problems of poor particle shape and emulsion stability, limited product application range, increase production cost and other problems, and achieve improved emulsion stability, The effect of reducing the particle size of latex particles and increasing production costs

Active Publication Date: 2018-03-13
CHINA PETROLEUM & CHEM CORP +1
View PDF15 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The existing traditional EVA emulsion polymerization multi-emulsifier and co-emulsifier are used in combination, the formula is complex, the latex particles are too large, easy to stick, particle shape and emulsion stability are poor; the use of a large number of emulsifiers increases production costs and pollutes the environment. , the scope of product application is limited

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
  • Method for preparing polyethylene-polyvinyl acetate elastomer soap-free microemulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Using ammonium persulfate as the initiator, the total amount is 0.5wt% of vinyl acetate, O / W system, the volume ratio of butanone and methanol is 10 / 1; the volume ratio of the mixed solvent to the water phase of the copolymerization system is 1 / 10, the system Before adding monomer VAc, the mechanical stirring speed was 300r / min; when monomer VAc was added, the mechanical stirring speed was 150r / min; the dosage of pH regulator was 0.5wt% of the monomer VAc dosage; MPa, the polymerization reaction time is 6h. Under this condition, the VAc content of the polymerization product is 62.1wt%, and the particle size of the emulsion is 50nm. The emulsion has good stability and can be stored stably for 13 months.

Embodiment 2

[0033] Using ammonium persulfate as the initiator, the total dosage is 0.5wt% of vinyl acetate, O / W system, the volume ratio of butanone and methanol is 9 / 2; the volume ratio of the mixed solvent to the water phase of the copolymerization system is 1 / 10, the system Before adding monomer VAc, the mechanical stirring speed was 300r / min; when monomer VAc was added, the mechanical stirring speed was 150r / min; the dosage of pH regulator was 0.5wt% of the monomer VAc dosage; MPa, the polymerization reaction time is 6h. Under this condition, the VAc content of the polymerization product is 62.2wt%, and the particle size of the emulsion is 64nm. The emulsion has good stability and can be stored stably for 12 months.

Embodiment 3

[0035] Using ammonium persulfate as the initiator, the total amount is 0.5wt% of vinyl acetate, O / W system, the volume ratio of butanone and methanol is 8 / 3; the volume ratio of the mixed solvent to the water phase of the copolymerization system is 1 / 10, the system Before adding monomer VAc, the mechanical stirring speed was 300r / min; when monomer VAc was added, the mechanical stirring speed was 150r / min; the dosage of pH regulator was 0.5wt% of the monomer VAc dosage; MPa, the polymerization reaction time is 6h. Under this condition, the VAc content of the polymerization product is 62.3wt%, and the particle size of the emulsion is 76nm. The emulsion has good stability and can be stored stably for 12 months.

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 sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing a polyethylene-polyvinyl acetate elastomer soap-free microemulsion. The method comprises the following steps: adding a mixed solvent into a water phase,adding a pH regulator, introducing ethylene and adding vinyl acetate, and allowing the ethylene and the vinyl acetate to generate a copolymerization reaction under the action of a water-soluble initiator so as to obtain the polyethylene-polyvinyl acetate elastomer microemulsion, wherein no emulsifiers or colloid protective agents are added into a reaction system; and the EVA soap-free microemulsion product has emulsion particles with small particle size and uniform particle distribution, and an emulsion has good stability. According to the invention, an addition proportion of the mixed solvent is controlled, so the particle size of emulsion particles can be reasonably reduced; the shape of particles is maintained; adhesion is prevented from occurrence; and the stability of the emulsion isgreatly improved. Meanwhile, no emulsifiers or colloid protective agents are added, so the formula of the emulsion can be simplified; the production cost of the emulsion is reduced; greenness, environmental friendliness and no pollution are realized; and the application fields of the emulsion are further expanded. The method provided by the invention has simple formula, low raw material cost, simple and convenient operation; and a target emulsion has good stability and can be stably stored for 11 months or above.

Description

technical field [0001] The invention relates to a method for preparing EVA elastomer microemulsion, in particular to a method for preparing EVA elastomer soap-free microemulsion. Background technique [0002] The EVA elastomer emulsion produced by emulsion polymerization has moderate vinyl acetate (VAc) content, high product transparency, excellent flexibility, low temperature flexibility, weather resistance, chemical corrosion resistance and compatibility with fillers and color masterbatches. Compatibility: EVA emulsion products have high strength, non-toxic and environmental protection, and excellent bonding performance. They can be used in textiles, light industry, coatings, plastic toughening, construction materials, polymer blended coatings, rubber modification and other fields. It is widely used, and its demand at home and abroad continues to increase, and it has developed rapidly in recent years. [0003] Patent CN101200518A adopts hydrogen peroxide-ferrous sulfate s...

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
IPC IPC(8): C08F218/08C08F210/02C08F2/01C08F2/22
CPCC08F2/22C08F218/08C08F210/02C08F2/01
Inventor 陈博刘小萌于鲁强
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