Supercharge Your Innovation With Domain-Expert AI Agents!

CNF-stabilized styrene-acrylic emulsion as well as preparation method and application thereof

A styrene-acrylic emulsion, stable technology, applied in the direction of adding enhancer, no pigment coating, coating, etc., can solve the problems of coating defects, coating adhesion, adverse effects of weather resistance, etc., to achieve short production cycle, improve Substrate strength and barrier properties, the effect of good application prospects

Active Publication Date: 2021-05-04
SOUTH CHINA UNIV OF TECH
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the curing process of the coating, the volatilization of the surfactant will lead to the appearance of coating defects, and the surfactant remaining in the coating will have an adverse effect on the coating adhesion, weather resistance, etc.

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
  • CNF-stabilized styrene-acrylic emulsion as well as preparation method and application thereof
  • CNF-stabilized styrene-acrylic emulsion as well as preparation method and application thereof
  • CNF-stabilized styrene-acrylic emulsion as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] (1) Methyl methacrylate (MMA), butyl acrylate (BA) and styrene (St) were prepared into a monomer mixture in a ratio of 4:5:1 (mass ratio), and the concentration was 1 wt%. cellulose nanofibrils (CNF) suspension to obtain a CNF-monomer mixture; wherein the amount of the CNF suspension is 90% of the total mass of the CNF-monomer mixture; use a high-speed stirrer to mechanically disperse at a speed of 650rpm for 10min , and the CNF-monomer emulsion was obtained after ultrasonic emulsification for 30 min, wherein the ultrasonic power was 1200W.

[0051] (2) In the CNF-monomer emulsion, add initiator ammonium persulfate, the addition is 0.6% of the monomer mixed liquid quality in the step (1), mix well; then take out 25wt% CNF-monomer emulsion containing initiator Join in the reactor as seed emulsion, and add sodium bicarbonate, the addition amount of sodium bicarbonate is 0.2% of the monomer mixture liquid quality in the step (1); Under the stirring speed of 100rpm, be warm...

Embodiment 2

[0053] (1) Methyl methacrylate (MMA), butyl acrylate (BA) and styrene (St) were prepared into a monomer mixture in a ratio of 4:5:1 (mass ratio), and the concentration was added at 0.8wt % CNF suspension to obtain a CNF-monomer mixture; wherein the amount of CNF suspension is 90% of the total mass of the CNF-monomer mixture; use a high-speed mixer to mechanically disperse at a speed of 650rpm for 10 minutes, and then undergo ultrasonic emulsification for 30 minutes Finally, a CNF-monomer emulsion was obtained, wherein the ultrasonic power was 1200W.

[0054] (2) In the CNF-monomer emulsion, add initiator ammonium persulfate, the addition is 0.6% of the monomer mixed liquid quality in the step (1), mix well; then take out 25wt% CNF-monomer emulsion containing initiator Join in the reactor as seed emulsion, and add sodium bicarbonate, the addition amount of sodium bicarbonate is 0.2% of the monomer mixture liquid quality in the step (1); Under the stirring speed of 100rpm, be wa...

Embodiment 3

[0056] (1) Methyl methacrylate (MMA), butyl acrylate (BA) and styrene (St) were prepared into a monomer mixture in a ratio of 4:5:1 (mass ratio), and the concentration of 0.6wt % CNF suspension to obtain a CNF-monomer mixture; wherein the amount of CNF suspension is 90% of the total mass of the CNF-monomer mixture; use a high-speed mixer to mechanically disperse at a speed of 650rpm for 10 minutes, and then undergo ultrasonic emulsification for 30 minutes Finally, a CNF-monomer emulsion was obtained, wherein the ultrasonic power was 1200W.

[0057] (2) In the CNF-monomer emulsion, add initiator ammonium persulfate, the addition is 0.6% of the monomer mixed liquid quality in the step (1), mix well; then take out 25wt% CNF-monomer emulsion containing initiator Join in the reactor as seed emulsion, and add sodium bicarbonate, the addition amount of sodium bicarbonate is 0.2% of the monomer mixture liquid quality in the step (1); Under the stirring speed of 100rpm, be warming up t...

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
Viscosityaaaaaaaaaa
Viscosityaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a CNF-stablized styrene-acrylic emulsion as well as a preparation method and application thereof. The method comprises the following steps: (1) uniformly mixing methyl methacrylate, butyl acrylate and styrene, then adding a cellulose nanofibril suspension to obtain a CNF-monomer mixed solution, and then mechanically dispersing and ultrasonically emulsifying to obtain a CNF-monomer emulsion; and (2) adding an initiator into the CNF-monomer emulsion to obtain a CNF-monomer emulsion containing the initiator; and then taking out part of the emulsion, adding a pH regulator, heating to 75-80 DEG C, carrying out seed emulsion polymerization, and after dropwise adding the remaining part of the emulsion, carrying out heat preservation for a period of time to obtain the CNF-stabilized styrene-acrylic emulsion. The CNF is used for replacing a traditional interfacial agent and an emulsifying monomer and is polymerized to obtain the styrene-acrylic emulsion stabilized by the CNF, and the styrene-acrylic emulsion has the advantages of high storage stability, strong functionality and the like, and can improve the strength and barrier property of paper when being applied to a paper coating.

Description

technical field [0001] The invention relates to the technical field of water-based coatings, in particular to a styrene-acrylic emulsion stabilized by CNF and its preparation method and application. Background technique [0002] Styrene-acrylic emulsion is a copolymer prepared by emulsion polymerization of styrene and acrylate monomers. It has strong adhesion, good oil resistance, heat resistance, and aging resistance. Styrene monomer is used to replace part of methacrylic acid. Methyl ester monomer can greatly reduce the cost of emulsion products, has good social and economic benefits, and is widely used in construction, textile, papermaking and other fields. The traditional styrene-acrylic emulsion polymerization process requires the use of non-environmentally friendly surfactants to provide polymerization sites. During the curing process of the coating, the volatilization of the surfactant will lead to the appearance of coating defects, and the surfactant remaining in th...

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): C08F220/18C08F220/14C08F212/08C08F2/44D21H19/34D21H19/20D21H21/18
CPCC08F2/44C08F220/1804D21H19/20D21H19/34D21H21/18C08F220/14C08F212/08
Inventor 陈泓丞杨仁党李喜坤唐方圆
Owner SOUTH CHINA UNIV OF TECH
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