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

Method for micro-suspension polymerization preparation of sub-micron polyurethane-modified polyacrylate copolymerized latex

A technology of polyurethane modification and polyacrylate, which is applied in the direction of grafting polymer adhesives, adhesives, adhesive types, etc., can solve the problems of harmful co-emulsifiers and low solid content of the final product, and achieve high solid content , Facilitate ultrasonic homogenization, improve the effect of mixing degree

Active Publication Date: 2014-09-10
ZHEJIANG SCI-TECH UNIV
View PDF1 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through miniemulsion polymerization, although latex particles with a higher degree of modification can be obtained, the particle size of the obtained copolymerized latex is less than 500nm, and the solid content of the final product is generally low. In order to improve the stability of submicron monomer droplets, it is necessary to Need to bring in a lot of harmful co-emulsifiers

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 micro-suspension polymerization preparation of sub-micron polyurethane-modified polyacrylate copolymerized latex
  • Method for micro-suspension polymerization preparation of sub-micron polyurethane-modified polyacrylate copolymerized latex
  • Method for micro-suspension polymerization preparation of sub-micron polyurethane-modified polyacrylate copolymerized latex

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] According to the feed ratio shown in Table 1, monomer mixtures with different monomer ratios were prepared. Proceed as follows:

[0038] Add the isocyanate monomer and polyol to an appropriate amount of acrylate monomer containing hexadecane as an emulsifier to obtain a monomer mixture, add the catalyst dibutyllithium dilaurate, heat up to 60°C for prepolymerization for 30 minutes, add 2,2 dihydroxypropionic acid was subjected to chain extension reaction for 45 minutes, and finally an end-capping agent was added for end-capping to obtain an oily monomer mixture.

[0039] Carry out fine emulsification and polymerization reaction according to the technological formula shown in table 2, step is as follows:

[0040] Add the initiator azobisisobutylcyanide (AIBN) into the oily monomer mixture, after it is completely dissolved, pour the monomer mixture into the aqueous solution of the dispersant polyvinyl alcohol PVA, and microsuspend it by ultrasonic to obtain a microsuspen...

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
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for micro-suspension polymerization preparation of a sub-micron polyurethane-modified polyacrylate copolymerized latex. The method comprises the steps: adding an isocyanate monomer and polyhydric alcohol into an acrylate monomer containing an auxiliary emulsifier cetane, adding a catalyst dibutyl lithium dilaurate, heating up, carrying out a prepolymerization reaction for 20-40 min, adding 2,2-dihydroxy propionic acid, carrying out a chain extension reaction, finally adding an end-capping agent, and thus obtaining an oily monomer mixed solution; adding an initiator azobisisobutyronitrile into the oily monomer mixed solution, then pouring into a dispersant polyvinyl alcohol aqueous solution, and carrying out ultrasonic micro-suspension emulsification; heating the micro-suspension liquid up to 60 DEG C-90 DEG C, carrying out a reaction for 4 h-8 h, dropping the temperature and cooling, and thus obtaining an emulsion. The copolymerized emulsion prepared by the method has the advantages of high solid content, good film-forming property, simple preparation process, and easy implementation, can be used for a water-based latex adhesive, and is used in coating, printing and dyeing, papermaking, printing ink and other fields.

Description

technical field [0001] The invention relates to the field of modification and preparation of polyacrylate latex, in particular to a method for preparing submicron polyurethane-modified polyacrylate copolymer latex by microsuspension polymerization. Background technique [0002] Acrylic polymer (PA) has good properties such as good aging resistance and light resistance, and is widely used as a coating film-forming agent, textile printing and dyeing adhesive, daily chemical industry, functional film, medical polymer and water treatment, etc. . However, acrylate polymers also have disadvantages such as poor water resistance, insufficient moisture permeability, easy to become brittle at low temperature, and easy to become viscous and lose strength at high temperature, which restricts its application in more fields. [0003] Polyurethane resin products (PU) have many advantages such as excellent wear resistance, weather resistance, chemical resistance, high temperature resistanc...

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): C08F290/06C08F220/18C08F220/14C08F220/06C08F2/20C08G18/83C08G18/66C08G18/48C08G18/10C09J151/08
Inventor 戚栋明陈智杰高玉洁曹志海
Owner ZHEJIANG SCI-TECH UNIV
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