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Poly acrylate composite emulsion for pressure' sensitive adhesive and its preparing and using method

A polyacrylate and pressure-sensitive adhesive technology, which is applied in the direction of adhesives, adhesive types, ester copolymer adhesives, etc., can solve the problem of uncontrollable thickness of the core layer and shell layer of latex particles, uneven dispersion, and pressure-sensitive adhesives. Problems such as initial adhesive performance and cohesive performance cannot be taken into account at the same time

Inactive Publication Date: 2007-04-11
HEBEI UNIV OF TECH
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  • 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 provide a polyacrylate composite emulsion for pressure-sensitive adhesives and its preparation and application method. Silane coupling agent-modified nano-silica as the core, a core / shell structure inorganic-organic composite emulsion with the copolymer of acrylate and acrylic acid monomer as the shell, and drying the composite emulsion film to obtain acrylate Pressure-sensitive adhesives, overcome the inability to balance the initial adhesion and cohesion properties of pure acrylate pressure-sensitive adhesives, and the uneven dispersion of nano-silica in the polyacrylate pressure-sensitive adhesive matrix, and the thickness of the core layer and shell layer of latex particles. Disadvantages of control and wide particle size distribution

Method used

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  • Poly acrylate composite emulsion for pressure' sensitive adhesive and its preparing and using method
  • Poly acrylate composite emulsion for pressure' sensitive adhesive and its preparing and using method
  • Poly acrylate composite emulsion for pressure' sensitive adhesive and its preparing and using method

Examples

Experimental program
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Effect test

Embodiment 1

[0083] (1) Preparation of nano-silica alcohol sol

[0084] Install a stirrer, a reflux condenser and a thermometer on a 1000mL three-necked flask, first add 750mL of absolute ethanol and 45mL of ammonia water with a concentration of 25wt%, stir for 5 minutes to make the solution evenly mixed, and then add dropwise at a rate of 22.5mL per hour 45mL tetraethyl orthosilicate, after the tetraethyl orthosilicate was added dropwise, reacted in a water bath at 40°C for 4 hours to obtain a monodisperse nano-silica alcohol sol with a particle size of 125 nm and a particle size distribution index of 0.0492 SiO is used in the following table 2 Express), the mass percent composition of nano-silica in this silanol sol measured by drying weighing method is 1.94%;

[0085] (2) Surface modification of nano-silica

[0086] Weighing the above-mentioned silica sol quality is 610g, and the mass percentage is 1.94%, then the quality of silicon dioxide is 11.834g; Add 10 μ mol silane coupling age...

Embodiment 2～5

[0098] Just change the consumption of the silane coupling agent in (2) step silicon dioxide surface modification step of embodiment 1, formula sees table 1, the silicon dioxide after the modification of different consumption silane coupling agents is used for embodiment 1 (3) 1. the preparation of step seed emulsion, formula sees Table 2, and all the other operations are the same as embodiment 1, and the parameters in the prepared seed emulsion and the final composite emulsion are shown in Table 14; The prepared pressure-sensitive adhesive tape properties are shown in Table 15.

[0099] Example serial number

[0100] MPS in Table 1 represents the silane coupling agent γ-methacryloxypropyltrimethoxysilane

[0101] Example

[0102] In Table 2, BA is butyl acrylate, AA is acrylic acid, and TDM is dodecyl mercaptan

Embodiment 6～8

[0104] Just change the consumption of the modified nano silicon dioxide powder in the preparation step of (3) step seed emulsion in embodiment 1, formula is shown in Table 3, and all the other operations are with embodiment 1, prepared seed emulsion and final The parameters in the composite emulsion are shown in Table 14; the properties of the prepared pressure-sensitive adhesive tape are shown in Table 15.

[0105] Example

[0106] In Table 3, BA is butyl acrylate, AA is acrylic acid, and TDM is dodecyl mercaptan.

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Abstract

The present invention is composite polyacrylate emulsion for pressure sensitive adhesive and its preparation process and application, and relates to polyacrylate based adhesive. The composite emulsion is one core-shell structure with silane cross-linking agent surface modified nanometer silica as the core and the copolymer of acrylate and acrylic acid as the shell, and has solid content of 30-40 %, viscosity of 1-6 mPa.s, composite emulsion particle size of 250-700 nm and particle size dispersing index of 0.005-0.15. The composite polyacrylate emulsion is prepared through preparing nanometer silica alcohol sol, surface modification of nanometer silica and preparing nanometer silica-polyacrylate composite emulsion. The composite polyacrylate emulsion coating is dried to obtain the pressure sensitive adhesive with high initial adhering performance and cohesive property.

Description

technical field [0001] The technical solution of the present invention relates to an adhesive based on an acrylate polymer, in particular a polyacrylate composite emulsion for a pressure-sensitive adhesive and a preparation and application method thereof. Background technique [0002] Because emulsion polymerization uses water as the medium, it has the advantages of low toxicity, wide range of emulsion viscosity, and adjustable rheology, so its application is becoming more and more extensive. Acrylate polymer emulsion has become the leader among many polymer emulsions used to prepare pressure-sensitive adhesive products due to its superior film-forming properties, good oil resistance and weather resistance, and excellent adhesion. Acrylate emulsion The market share used in the preparation of pressure-sensitive adhesives has been rising [John Garrett, Peter A. Lovell, Alison J. Shea and Roger D. Viney. Water-bornepressure-sensitive adhesives: effects of acrylic acid and parti...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F2/44C08F2/38C08K9/06C08K3/36C09J133/08C09J7/02
Inventor 瞿雄伟郭亚昆张继阳刘国栋姚艳梅张留成
Owner HEBEI UNIV OF TECH
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