Acrylic emulsion and preparation method thereof

An acrylic emulsion and solid acrylic technology, applied in coating, application, ink and other directions, can solve the problems of poor water resistance of coating, poor ethanol stability, high temperature sensitivity, etc., to overcome poor water resistance, high ethanol stability, and a wide range of applications. Effect

Active Publication Date: 2019-10-22
山西省应用化学研究所(有限公司) +1
View PDF11 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the poor ethanol stability of the acrylic emulsion existing in the prior art and the poor water resistance and high temperature sensitivity of the prepared coating, thereby providing an acrylic emulsion and its preparation method

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
  • Acrylic emulsion and preparation method thereof
  • Acrylic emulsion and preparation method thereof
  • Acrylic emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] The preparation method of above-mentioned acrylic acid emulsion comprises the following steps:

[0021] (1) Alkali-soluble solid acrylic resin with a molecular weight of 4000-12000 and an acid value of 170-250mgKOH / g and alkaline substances are dissolved in water at 60-80°C to form an alkali-soluble solid acrylic resin solution with a mass concentration of 30%;

[0022] (2) Add deionized water to the acrylic resin liquid obtained in step (1), add mixed monomers accounting for 5~10% of the total amount during the stirring process, and add NaHCO when the temperature rises to 70°C 3 and the initiator accounting for 30% of the total amount, keep warm at 80~85°C for 30-40 minutes;

[0023] (3) Add the remaining mixed monomers and 60% of the total amount of initiator at 80~85°C to the reactor dropwise within 3~4 hours; then add the rest of the initiator at 80~85°C Insulate and react at high temperature for 1-1.2 hours; naturally lower the temperature to 40-60° C., adjust the...

Embodiment 1

[0037] Take St 24.08g, BA 30.24g, HEMA 1.68g, as a mixed monomer for later use, take 0.50g K 2 S 2 o 8 , dissolved in 15.12g deionized water, and used as an initiator solution for subsequent use.

[0038] Add 24g Soluryl 70, 48g water, and 8g ammonia water (26%) into a 500 mL four-necked flask equipped with a stirrer, a thermometer, and a reflux condenser, raise the temperature to 65°C, and react for 1.5 h until the resin is completely dissolved. Add 48.9g of deionized water, stir well, add 2.8g of mixed monomers, stir fully at 500r / min for 20 minutes, start to heat up, at 70°C, add 4.69g of K 2 S 2 o 8 Aqueous solution, 0.112g NaHCO 3 , reacted for 30 minutes at 80°C (the emulsion appeared light blue, and when the reflux of the monomer was completed, the emulsion was milky white); then, added dropwise the remaining 53.2g mixed monomer and 9.38g K 2 S 2 o 8 Aqueous solution, add dropwise at a constant speed, the whole dropping process is controlled within 3~4 h; after ...

Embodiment 2

[0040] Take St 24g, BA 33g, N-methylolacrylamide 3g, as a mixed monomer for later use, take 0.54g K 2 S 2 o 8 , dissolved in 16.2g deionized water, and used as an initiator solution for subsequent use.

[0041] Into a 500 mL four-neck flask equipped with a stirrer, a thermometer and a reflux condenser, add 20 g of Soluryl 90, 40 g of water, and 6.7 g of ethanolamine, raise the temperature to 75°C, and react for 1.5 h until the resin is completely dissolved. Add 57.1g of deionized water, stir well, add 4.8g of mixed monomers, stir fully at 500r / min for 20 minutes, start to heat up, at 70°C, add 5g of K 2 S 2 o 8 Aqueous solution, 0.12g NaHCO 3 , react for 0.5 h at 80 ℃ (the emulsion appears light blue, and when the reflux of the monomer is completed, the emulsion is milky white); then, add the remaining 55.2g of mixed monomer and 10g of K 2 S 2 o 8 Aqueous solution, add dropwise at a constant speed, and the whole dropping process is controlled within 3~4 h to complete; ...

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
acid valueaaaaaaaaaa
Login to view more

Abstract

The invention relates to an acrylic emulsion and a preparation method thereof. The preparation method comprises the following steps: dissolving an alkali-soluble solid acrylic resin and an alkaline substance in water to obtain an alkali-soluble solid acrylic resin solution with the mass concentration of 30%; then adding deionized water, adding a mixed monomer accounting for 5-10% of the total weight in the stirring process, heating to 70 DEG C, adding NaHCO3 and an initiator accounting for 30% of the total weight, and preserving heat at 80-85 DEG C 30-40 minutes; completing dropwise addition of the remaining mixed monomer and the initiator accounting for 60% of the total weight into a reaction kettle within 3-4 hours at 80-85 DEG C; then adding the remaining initiator, and performing a heat preservation reaction at 80-85 DEG C for 1-1.2 hours; naturally cooling to 40-60 DEG C, adjusting the pH to 7-8 by using ammonia water, and filtering to obtain the acrylic emulsion. The obtained acrylic emulsion has relatively high ethanol stability and can overcome the application problems of coating such as poor water resistance and sensitivity to high and low temperatures.

Description

technical field [0001] The invention belongs to the field of water-based acrylic emulsion, in particular to an acrylic emulsion without emulsifier and a preparation method thereof. Background technique [0002] With the gradual strengthening of environmental protection awareness and regulations, acrylic emulsion has gradually become the main resin in the preparation of water-based varnishes, water-based inks, and water-based paints. The traditional acrylic emulsion polymerization is based on acrylic monomers dispersed in water or other solvents to form an emulsion under the action of a low molecular weight emulsifier for free radical polymerization. In this process, it is difficult to realize the transformation of acrylic acid polymerization from oil phase to water phase without suitable emulsifier. However, the use of emulsifiers also brings many problems to acrylic emulsions and the coatings made of them, such as storage stability, alcohol stability of alcohol solvents ad...

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): C08F220/18C08F212/08C08F220/20C08F220/58C08F220/06C08F2/22C09D133/08C09D125/14C09D11/30C09D11/107
CPCC08F220/18C08F212/08C08F2/22C09D133/066C09D133/24C09D133/064C09D125/14C09D11/107C09D11/30C08F220/1804
Inventor 吴建兵梁庆丰马小龙李萍刘伟郝静马国章
Owner 山西省应用化学研究所(有限公司)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap