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

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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Example Embodiment

[0082] Example 1

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

[0084] Install a stirrer, reflux condenser and thermometer on the 1000mL three-necked flask, first add 750mL absolute ethanol, 45mL 25wt% ammonia water, stir for 5 minutes to make the solution evenly mixed, and then add dropwise at 22.5mL per hour 45mL of ethyl orthosilicate, after the addition of ethyl orthosilicate is completed, react for 4 hours in a 40℃ water bath to obtain a monodisperse nano silica alcohol sol with a particle size of 125nm and a particle size distribution index of 0.0492 ( SiO is used in the following list 2 Means), the mass percentage of nano-silica in the silanol sol measured by the drying and weighing method is 1.94%;

[0085] (2) Surface modification of nano silica

[0086] Weigh the above silica sol mass to 610g, the mass percentage is 1.94%, then the mass of silica is 11.834g; calculate by adding 10μmol silane coupling agent per square meter of silica surface area, take the silane c...

Example

[0097] Examples 2~5

[0098] Just change the dosage of the silane coupling agent in the step (2) of the silica surface modification step of Example 1. The formula is shown in Table 1. The silica modified with different dosages of the silane coupling agent is used in the examples. Step 1 (3) ① Preparation of seed emulsion, the formula is shown in Table 2, the rest of the operation is the same as in Example 1, the parameters of the prepared seed emulsion and the final composite emulsion are shown in Table 14; the properties of the prepared pressure-sensitive tape are shown in Table 15.

[0099] Example number

[0100] MPS in Table 1 stands for silane coupling agent γ-methacryloxypropyltrimethoxysilane

[0101] Example

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

Example

[0103] Examples 6-8

[0104] Just change the dosage of the modified nano-silica powder in the preparation step of step (3)① in the seed emulsion in Example 1. The formula is shown in Table 3. The rest of the operation is the same as that in Example 1. The prepared seed emulsion and the final The parameters in the composite emulsion are shown in Table 14; the properties of the pressure-sensitive adhesive tape prepared 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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