Process for preparing poly acrylate composite emulsion for pressure sensitive adhesive

A polyacrylate, pressure-sensitive adhesive technology, applied in the direction of adhesive types, ester copolymer adhesives, etc., can solve the problem of poor heat resistance, UV resistance and other properties of the coating film, and the related patents have not yet been reported. The problem of poor viscosity and other problems can achieve the effect of dimensional stability, production cost reduction, and dimensional thermal stability.

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

However, this polymer-polymer emulsion type acrylate pressure-sensitive adhesive has the following disadvantages: when the initial adhesion of the pressure-sensitive adhesive is good, the holding performance will be poor; Poor, that is, by changing the type and amount of soft and hard monomers that make up the pressure-sensitive adhesive, the initial adhesion and holding performance cannot be achieved at the same time; and the heat resistance and ultraviolet resistance of the coating film are also poor [M.D.Gower, R.A. Shanks. The Effect of Varied Monomer Composition on Adhesive Performance and Peeling Master Cures for Acrylic Pressure-Sensitive Adhesives. Journal of Applied Polymer Science, 2004, Vol.93, 2909-2917]
In addition, there is no report on the related patents of adding nano-silica to pressure-sensitive adhesives, especially the compounding of silica hydrosol and acrylate emulsion to prepare pressure-sensitive adhesives.

Method used

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  • Process for preparing poly acrylate composite emulsion for pressure sensitive adhesive
  • Process for preparing poly acrylate composite emulsion for pressure sensitive adhesive
  • Process for preparing poly acrylate composite emulsion for pressure sensitive adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] a. Preparation of seed emulsion

[0048] Ingredient parts by weight

[0049] Deionized water 100g

[0050] Nano Silica Hydrosol 4g

[0051] Emulsifier MA-80 0.09g

[0052] The above-mentioned nano-silica hydrosol is prepared according to the sodium silicate hydrolysis method disclosed in CN 02116759.1, its solid content is 42%-45%, the particle size is between 50-100nm, and the particle size distribution index is 0.05-0.195 Between, as shown in Figure 1, the particle diameter of this nanometer silicon dioxide is 75nm, particle size distribution coefficient 0.156, solid content is 42.53%;

[0053] In a 500mL five-neck flask, add the above-mentioned deionized water, emulsifier and nano-silica hydrosol in specified parts by weight, and stir the reaction mixture for 30 minutes to disperse it evenly to obtain a seed emulsion for subsequent use;

[0054] b. Pre-emulsification of shell monomer

[0055] Ingredient parts by mass

[0056] Butyl acrylate (hereinafter referre...

Embodiment 2～4

[0082] The ratio and amount of the pre-emulsified shell monomer components used in the step of b. shell monomer pre-emulsification in Example 1 was changed. The formula is shown in Table 1. Others were kept unchanged, and the operation was the same as in Example 1.

[0083] Example

Embodiment 5～7

[0085] The amount of emulsifier in the preparation step of a. seed emulsion of embodiment 1 is changed, and other amounts are unchanged, and the influence of the amount of emulsifier in the preparation stage of seed emulsion on the particle size of latex particles and the performance of pressure-sensitive adhesive is investigated. The formula is shown in Table 2 , operate with embodiment 1.

[0086] implement

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Abstract

The present invention is preparation process of composite polyacrylate emulsion for pressure sensitive adhesive, and relates to polyacrylate based adhesive. The composite emulsion in core-shell structure is prepared through compounding nanometer silica hydrosol and polyacrylate emulsion. Specifically, the preparation process includes the following steps: 1. preparing seed emulsion, of which the nanometer silica hydrosol is prepared through sodium silicate hydrolyzing process and has solid content of 42-45 %, particle size of 50-100nm and particle size dispersing index of 0.05-0.195; 2. pre-emulsifying of shell monomer; and 3. 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 good long time adhering performance.

Description

technical field [0001] The technical solution of the present invention relates to an adhesive based on an acrylate polymer, in particular to a preparation method of a polyacrylate composite emulsion for a pressure-sensitive adhesive. Background technique [0002] In recent years, organic-inorganic nanocomposites have attracted great attention, because the use of nanomaterials in polymers can improve the mechanical, thermal, electrical, optical and processing properties of polymer materials, and improve the toughness, strength, and durability of polymers. Thermal and flame retardancy etc. However, only when the inorganic particles are uniformly dispersed in the polymer matrix with nanometer size can the role of nano-inorganic particles be fully exerted. At present, commonly used nano-inorganic particles are nano-silicon dioxide, nano-calcium carbonate, and the like. Because nano-silica has a wide range of sources and its price is lower than other inorganic nano-materials, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F2/38C08F2/24C08F4/30C09J133/08
Inventor 瞿雄伟郭亚昆姚艳梅张继阳刘国栋张留成
Owner HEBEI UNIV OF TECH
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