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

Preparation of acrylic ester copolymer emulsion for pressure-sensitive adhesive

A pressure-sensitive adhesive, acrylate technology, applied in the direction of ester copolymer adhesives, adhesive types, etc., can solve the problem of not being able to simultaneously achieve initial tack, peeling and holding properties, initial tack and peeling properties. It can reduce the amount of residual glue, improve the initial adhesion, and improve the adhesion.

Active Publication Date: 2009-04-22
HEBEI UNIV OF TECH
View PDF2 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Common emulsion acrylate pressure-sensitive adhesives on the market are mostly polymer-polymer type, and this type of adhesive has the following disadvantages: when the initial adhesion and peeling performance of the pressure-sensitive adhesive are good, the holding performance will be poor; When it is good, the initial adhesion performance and peeling performance will become worse, and the balance of initial adhesion performance, peeling performance and sticking performance cannot be achieved at the same time [M.D.Gower, R.A. Shanks.The effect of varied monomer composition on adhesive performance and peeling mastercures for acrylic pressure-sensitive adhesives. Journal of Applied Polymer Science, 2004, Vol.93, 2909-2917]
However, due to the uniform addition of methyl methacrylate (MMA) in the process of introducing hard monomers through the shell layer, the emulsion-type acrylate pressure-sensitive adhesive produced by the latex particles is easy to leave residue on the adherend after peeling off. When the glue and initial adhesive force are large, the holding force will decrease, 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
  • Preparation of acrylic ester copolymer emulsion for pressure-sensitive adhesive
  • Preparation of acrylic ester copolymer emulsion for pressure-sensitive adhesive
  • Preparation of acrylic ester copolymer emulsion for pressure-sensitive adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation of silica-acrylate copolymer emulsion comprises the following steps:

[0028]①Preparation of seed emulsion: at 83°C, in a polymerization vessel, dissolve 0.23g of emulsifier di-isooctyl sulfonate sodium succinate in 200g of water evenly, add 4.96g of silica hydrosol and stir for 10 minutes, then add 36.6g mass ratio is 1.64% initiator potassium persulfate solution, then incubated for 15 to 25 minutes; the nano silicon dioxide of this emulsion is silicon dioxide hydrosol, which can be a commercially available silicon dioxide hydrosol product or as a polishing The silicon dioxide hydrosol that is filtered through a 300-mesh sieve after use has a solid content of 42% to 45% and a particle size of 40 to 95nm.

[0029] ②Pre-emulsification of the shell monomer: Divide 10.8g of methyl methacrylate into 6 parts according to n×0.72g, where n is 0, 1, 2, 3, 4, 5, add 0.5g of acrylic acid to each part, and then Add 106.2g of butyl acrylate to form 6 parts of shell...

Embodiment 2～3

[0047] Preparation:

[0048] 1. the preparation of seed emulsion: with embodiment 1.

[0049] ② Pre-emulsification of the shell monomer: 10.8g methyl methacrylate according to n × 0.72g, n is 5, 4, 3, 2, 1, 0 (for Example 2) or n = 2.5, 2.5, 2.5 . 20g; then 1.6g of emulsifier diisooctyl sulfonate sodium succinate and 0.04g of tert-dodecyl mercaptan are mixed evenly and divided into 6 equal parts, and they are respectively combined with 6 parts of shell units corresponding to the above The mixture is uniformly mixed to form a pre-emulsion; the quality of methyl methacrylate in each part of pre-emulsion gradually decreases, that is, a negative gradient, and the quality of methyl methacrylate in each part of pre-emulsion is constant, that is, uniform. The change of MMA quality with time is shown in Table 2 during the gradient feeding of Examples 2-3.

[0050] ③Shell layer gradient feeding: at 83°C, the 6 parts of pre-emulsion (20.27g per part) prepared in the previous step are...

Embodiment 4～6

[0055] Preparation:

[0056] 1. the preparation of seed emulsion: with embodiment 1.

[0057] ② Pre-emulsification of the shell monomer: 21.6g methyl methacrylate according to n × 1.44g, n is 0, 1, 2, 3, 4, 5 (for Example 4) or n is 5, 4, 3 . Butyl ester is added thereto to form 6 parts of shell monomers, each part of shell monomer quality is 20g; then 1.6g emulsifier diisooctyl sulfonate sodium succinate and 0.04g tert-dodecyl mercaptan are mixed Divide into 6 equal parts after uniformity, and mix them with the corresponding 6 parts of the shell monomer above to form a pre-emulsion. The change of MMA quality with time is shown in Table 3 during the gradient feeding of Examples 4-6.

[0058] ③Shell layer gradient feeding: at 83°C, use the 6 parts of pre-emulsion (20.27g each) prepared in the previous step according to the above n as 0, 1, 2, 3, 4, 5 or n as 5, 4, 3, 2, 1, 0 or n=2.5, 2.5, 2.5, 2.5, 2.5, 2.5 Arrangement sequence every 30 minutes in the 241.79g seed emulsion...

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 sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing an acrylate polymer emulsion used for a pressure sensitive adhesive, which belongs to an adhesive based on acrylate polymer. The method for preparing the acrylate polymer emulsion used for the pressure sensitive adhesive comprises the following steps: (1) preparation of a seed emulsion; (2) pre-emulsification of shell layer monomers; and (3) gradient feeding of a shell layer. The method adopts the seed emulsion polymerization technology to drip a hard monomer, namely methyl methacrylate (MMA) into the shell layer, so that the concentration is subjected to discontinuous change and the organic-inorganic acrylate polymer emulsion provided with an obvious core-shell structure is prepared, wherein nano silicon dioxide is taken as a core and a copolymer of acrylic ester and acrylic monomers is taken as the shell layer; and the hard monomer of the shell layer is subjected to concentration gradient change. The acrylate polymer emulsion can be used as the pressure sensitive adhesive after drying and film forming; the prepared pressure sensitive adhesive has the advantages of high continuous viscous force and reduction of the residual gum content under the condition of gum peeling; and the initial adhesion and the peeling strength can be improved when the continuous viscous force is larger.

Description

technical field [0001] The technical solution of the present invention relates to an adhesive based on an acrylate copolymer, in particular to a method for preparing an acrylate copolymer emulsion for a pressure-sensitive adhesive. Background technique [0002] Pressure-sensitive adhesives can be prepared by processes such as emulsion polymerization, solution polymerization, heating and melting, and UV curing. However, in recent years, with people's emphasis on environmental protection, safety, energy saving, etc. and the continuous expansion of the application of pressure-sensitive adhesives, pressure-sensitive adhesives have been promoted to develop in the direction of low pollution, energy saving, high performance and multi-functionality, especially in developed countries. After putting forward pollution-free, pollution-free, resource-saving and energy-saving as the prerequisites for developing the adhesive industry, water-based emulsion pressure-sensitive adhesives have ...

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): C08F220/18C08F2/24C08F2/44C08K3/36C09J133/08C08F220/14
Inventor 瞿雄伟杨建光王农跃张愚姚艳梅张广林
Owner HEBEI UNIV OF TECH
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