Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of styrene-acrylate soap-free emulsion

A technology of styrene-acrylic soap-free emulsion and styrene, applied in the field of preparation of styrene-acrylic soap-free emulsion, to achieve the effects of improving stability and storage stability, overcoming adhesion, and improving mechanical properties

Inactive Publication Date: 2014-04-16
山西浩腾科技有限公司
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Soap-free emulsions with good performance can be prepared by introducing ionic comonomers and reactive emulsifiers. However, there is a contradiction between the solid content and stability of the emulsion. Generally, the solid content of the emulsion is about 20%.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 1) First, mix 60% butyl acrylate and 40% styrene by mass percentage to make mixed monomers;

[0015] 2) Next, add the deionized water of 200% of the mixed monomer quality, 4% emulsifier PAA-b-PS (M n 1262, PDI is 1.07), 0.27% initiator ammonium persulfate, 1.33% sodium bicarbonate and 1 / 3 part of mixed monomer, nitrogen reaction while stirring for 30 minutes;

[0016] 3) Finally, the temperature of the mixture in step 2) was raised to 80°C, and the initiator ammonium persulfate aqueous solution of 0.53% of the mass of the mixed monomer was added by a peristaltic pump within 90 minutes and the remaining 2 / 3 parts of the mixed monomer were added. After finishing, react at 85 ℃ for 120 minutes, the reaction finishes, be cooled to 45 ℃, discharge, obtain the styrene-acrylic soap-free emulsion of solid content 26.79%, its latex film water absorption rate is 14.53%.

Embodiment 2

[0017] Embodiment 2: 1) First, 70% butyl acrylate and 30% styrene are mixed uniformly by mass percentage to prepare mixed monomers;

[0018] 2) Next, add the deionized water of 200% of the mixed monomer quality, 2% emulsifier PAA-b-PS (M n 1262, PDI is 1.05), 0.1% initiator ammonium persulfate, 1.28% sodium bicarbonate and 1 / 3 part of mixed monomers, nitrogen reaction while stirring for 30 minutes;

[0019] 3) Finally, the temperature of the mixture in step 2) was raised to 82°C, and within 90 minutes, a peristaltic pump was used to add 0.4% of the initiator ammonium persulfate aqueous solution and the remaining 2 / 3 parts of the mixed monomer, and the monomer was added. After completion, react at 85° C. for 90 minutes. After the reaction is completed, cool down to 45° C. and discharge to obtain a styrene-acrylic soap-free emulsion with a solid content of 25.26%.

Embodiment 3

[0020] Embodiment 3: 1) First, 50% butyl acrylate and 50% styrene were mixed uniformly by mass percentage to prepare mixed monomers;

[0021] 2) Next, add the deionized water of 200% of the mixed monomer quality, 4% emulsifier PAA-b-PS (M n It is 1746, PDI is 1.14), 0.33% initiator potassium persulfate, 1.33% sodium bicarbonate and 1 / 3 part of mixed monomer, nitrogen reaction while stirring for 30 minutes;

[0022] 3) Finally, the temperature of the mixture in step 2) was raised to 80°C, and the initiator potassium persulfate aqueous solution of 0.66% of the mass of the mixed monomer was added by a peristaltic pump within 120 minutes and the remaining 2 / 3 parts of the mixed monomer were added. After finishing, react at 87 DEG C for 70 minutes, the reaction finishes, cool down to 45 DEG C, discharge, promptly obtain the styrene-acrylic soap-free emulsion of solid content 25.97%, its latex film water absorption rate 18.73%.

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 diameteraaaaaaaaaa
molecular weight distributionaaaaaaaaaa
water absorptionaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of styrene-acrylate soap-free emulsion. According to the preparation method, the conventional emulsifier is substituted by using amphiphilic block copolymer polyacrylic acid-b-polystyrene (PAA-b-PS) with an active end group, and butyl acrylate and styrene are subjected to soap-free emulsion copolymerization to prepare the styrene-acrylate soap-free emulsion which is suitable for being applied to the fields of leather, textile, coating, papermaking, adhesives and the like. The PAA-b-PS used in the preparation method is anchored on latex particles in emulsion polymerization, a hydrophilic chain segment extends into a water phase, and the latex particles are stable through an electrostatic effect and a steric effect, so that the storage stability and the anti-freeze thawing stability of the emulsion are improved, the defects of poor coating adhesion, water resistance, solvent resistance and the like of the normal styrene-acrylate emulsion are overcome, and the mechanical property, the adhesion and the wear resistance of the emulsion are improved.

Description

technical field [0001] The invention relates to a preparation technology of a soap-free emulsion, in particular to a preparation method of a styrene-acrylic soap-free emulsion. Background technique [0002] Styrene-acrylic emulsion has good film-forming properties, high gloss, stain resistance, strong adhesion, abundant raw material sources, and low production cost. It is widely used in coatings, textiles, leather, paper, adhesives, etc. and photosensitive materials and other fields. In the styrene-acrylic emulsion prepared by traditional emulsion polymerization, the small molecule emulsifier is attached to the surface of the latex particles by physical adsorption, and it is easily desorbed by the influence of the external environment, causing the latex particles to collide, making the emulsion intolerant to electrolytes, Easy flocculation and other shortcomings; small molecule emulsifiers will migrate to the surface of the film during the film forming process, thereby affe...

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 Patents(China)
IPC IPC(8): C08F220/18C08F212/08C08F2/24
Inventor 周建华张琳
Owner 山西浩腾科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com