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

A kind of rewet repairable modified water-based white latex and preparation method thereof

A technology for modifying water and white latex, which is applied in the direction of monocarboxylate copolymer adhesives, non-polymer adhesive additives, adhesive types, etc. To solve problems such as poor bonding and bonding, achieve excellent flexibility and pressure sensitivity, improve initial bonding positioning performance, and improve wet bonding performance

Active Publication Date: 2020-11-06
DONGGUAN STAR COSM POLYMER
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above vinyl acetate copolymer emulsion products prepared by modification have improved the bond strength, water resistance, heat resistance and other properties of the product, in the actual use process, such as manual veneer, PVC wallpaper, thermal insulation foam, books, etc. In applications such as bookbinding, due to uneven glue application, long cooling time, uneven pressing, etc., especially for some curved surfaces and bonding parts with high tension, poor bonding and blistering of the bonding parts are prone to occur after construction problems, and the poorly bonded parts cannot be repaired through simple treatment methods, resulting in the scrapping of the entire product
This is mainly because the white latex of the prior art can no longer produce the effect of activated bonding through external conditions such as heat, light, moisture, pH, etc. after the moisture volatilizes and solidifies to form a film.

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
  • A kind of rewet repairable modified water-based white latex and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of rewetting repairable modified water-based white latex of the present embodiment, the preparation method is as follows (all the following raw materials are by weight):

[0034] Step A, 25 parts of vinyl acetate, 15 parts of butyl acrylate, 6 parts of crosslinking agent and 0.02 part of chain transfer agent dodecane are mixed and stirred evenly to obtain a monomer mixture, which is set aside;

[0035] Step B, take 0.5 part of persulfate initiator, and prepare an aqueous initiator solution with a mass concentration of 2%, for subsequent use;

[0036] Step C. Add 40 parts of deionized water, 13 parts of protective colloidal polyvinyl alcohol and 0.5 parts of nonionic emulsifier into the reactor, start stirring, then raise the temperature to 92°C, fully dissolve for 2 hours, then cool down to 65°C; then, Add 1 part of buffer, 10 carboxyl group-containing polymerizable monomers, and 22% of the total mass of an initiator aqueous solution into the reactor, heat up to ...

Embodiment 2

[0048] A kind of rewetting repairable modified water-based white latex of the present embodiment, the preparation method is as follows (all the following raw materials are by weight):

[0049] Step A, 35 parts of vinyl acetate, 12 parts of butyl acrylate, 5 parts of crosslinking agent and 0.04 part of chain transfer agent dodecane are mixed and stirred evenly to obtain a monomer mixture, which is set aside;

[0050] Step B, get 1.2 parts of persulfate initiator, and prepare an aqueous initiator solution with a mass concentration of 1.5%, for subsequent use;

[0051] Step C, add 35 parts of deionized water, 15 parts of protective colloidal polyvinyl alcohol and 1.5 parts of nonionic emulsifier into the reactor, start stirring, then raise the temperature to 95°C, fully dissolve for 1.5 hours, then cool down to 70°C; then, Add 2.5 parts of buffering agent, 12 parts of carboxyl group-containing polymerizable monomers and an aqueous initiator solution accounting for 26% of the tota...

Embodiment 3

[0064] A kind of rewetting repairable modified water-based white latex of the present embodiment, the preparation method is as follows (all the following raw materials are by weight):

[0065] Step A, 40 parts of vinyl acetate, 7 parts of butyl acrylate, 10 parts of crosslinking agent and 0.03 part of chain transfer agent dodecane are mixed and stirred evenly to obtain a monomer mixture, which is set aside;

[0066] Step B, get 0.8 part of persulfate initiator, and prepare an aqueous initiator solution with a mass concentration of 3%, for subsequent use;

[0067] Step C. Add 45 parts of deionized water, 10 parts of protective colloidal polyvinyl alcohol and 2 parts of nonionic emulsifier into the reactor, start stirring, then raise the temperature to 93°C, fully dissolve for 1.3 hours, then cool down to 68°C; then, Add 0.5 parts of buffering agent, 5 carboxyl group-containing polymerizable monomers and an aqueous initiator solution accounting for 30% of the total mass to the r...

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

No PUM Login to View More

Abstract

The invention relates to the technical field of waterborne adhesives and in particular relates to rewetting repairable modified waterborne white latex and a preparation method thereof. A formula comprises the following components: 35.0 to 50.0 parts of de-ionized water, 10.0 to 20.0 parts of protective colloid polyvinyl alcohol, 0.5 to 2.5 parts of a non-ionic emulsifier, 0.5 to 2.5 parts of a buffering agent, 0.5 to 1.5 parts of a persulfate initiator, 0.01 to 0.05 part of a chain transfer agent dodecyl mercaptan, 25.0 to 54.0 parts of vinyl acetate, 5.0 to 15.0 parts of butyl acrylate, 5.0 to 15.0 parts of a carboxyl-containing polymerizable monomer, a crosslinking agent and the like. Compared with the prior art, the white latex provided by the invention can be used for realizing secondary adhesion through the effect of water and the technical difficult in the prior art that the white latex cannot be repaired after the white latex is cured into a film is overcome; the wet-state adhesion performance of the white latex is greatly improved; the rewetting repairable modified waterborne white latex has the advantages of rapid rewetting viscosity response, good initial adhesion positioning and high bonding strength.

Description

technical field [0001] The invention relates to the technical field of water-based adhesives, in particular to a rewet repairable modified water-based white latex and a preparation method thereof. Background technique [0002] Polyvinyl acetate emulsion (PVAC) is widely used as an environmentally friendly water-based adhesive for wood, decorative panels, paper products, cloth, thermal insulation materials, cement, etc. Bonding of porous materials such as ceramics and ceramics. [0003] In the prior art, polyvinyl acetate emulsion generally uses polyvinyl alcohol as the protective colloid, which is formed by thermally initiating the polymerization of vinyl acetate monomers by free radicals, and is modified by adding fillers, curing agents, plasticizers, etc. to prepare adhesives. White latex with high strength and good water resistance. For example, the invention patent 201510045195.6 discloses a strong white latex, which uses ethylene glycol dimethacrylate, toluene diisocy...

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): C09J131/04C09J11/08C09J11/06C08F218/08C08F220/18C08F220/06C08F222/16
CPCC08F218/08C09J11/06C09J11/08C09J131/04C08L71/02C08L5/08C08L29/04C08K5/053C08F220/1804C08F220/06C08F222/16
Inventor 蒋颜平赖淦荷
Owner DONGGUAN STAR COSM POLYMER
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