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Method for synthesis of ultraviolet curing pressure-sensitive adhesive by photopolymerization

An ultraviolet light, curing pressure technology, applied in the direction of ester copolymer adhesive, adhesive type, etc., can solve the problems of high energy consumption, difficult to control reaction rate, long reaction time, etc., to reduce environmental pollution, overcome easy Aging and overcoming the effect of high temperature resistance

Active Publication Date: 2013-10-02
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has a long reaction time and high energy consumption; the reaction rate is not easy to control

Method used

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  • Method for synthesis of ultraviolet curing pressure-sensitive adhesive by photopolymerization
  • Method for synthesis of ultraviolet curing pressure-sensitive adhesive by photopolymerization
  • Method for synthesis of ultraviolet curing pressure-sensitive adhesive by photopolymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of acrylate oligomers by UV polymerization: In a three-necked flask equipped with a stirrer, a reflux condenser and a thermometer, add the following components by mass: butyl acrylate: 94 parts, methyl methacrylate: 6 parts, acrylic acid: 9 parts, free radical photoinitiator: 1 part, mix well, use UV LED light source to irradiate from the bottom of the three-necked flask to initiate monomer polymerization, fix the distance between the UV LED light source and the bottom of the bottle to 1cm (UV LED lamp wavelength 365nm, the light intensity is 82mw∕cm 2 ), when the system reaches the required viscosity (3000cps~6000cps, 25℃), stop the light to obtain acrylic oligomer.

[0031] Preparation of UV-curable pressure-sensitive adhesive: Cool the acrylic oligomer obtained by photopolymerization to room temperature, and then add the following components by mass to the above three-necked bottle: free radical photoinitiator BAPO: 1.5 parts, active Crosslinking agent tricy...

Embodiment 2 Embodiment 33

[0034] The preparation method of the acrylic oligomers of Examples 2 to 33 is basically the same as that of Example 1, and the preparation method of the UV-curable pressure-sensitive adhesive is also basically the same as that of Example 1. The components and corresponding weights The values ​​of the ratio are shown in Table 1 and Table 4. 180° peel strength of UV-curable pressure sensitive adhesive (unit: N∕25mm). See Table 1 and Table 4 for details.

[0035] Table 1

[0036]

[0037] Table 2

[0038]

[0039] table 3

[0040]

[0041] Table 4

[0042] .

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Abstract

The invention relates to a method for synthesis of an ultraviolet curing pressure-sensitive adhesive by photopolymerization. The method comprises the steps of: (1) mixing acrylate monomers (viscous monomers, cohesion monomers, and modified monomers) with a free radical photoinitiator evenly, conducting irradiating with an ultraviolet lamp, when the viscosity of the system reaches 3000cps-6000cps at 25DEG C, stopping irradiating, thus obtaining an acrylate oligomer; and (2) cooling the obtained acrylate oligomer to room temperature, then replenishing it with 0-5 parts by mass of the free radical photoinitiator and 0-5 parts by mass of an active crosslinking agent, mixing them uniformly to obtain the ultraviolet curing pressure-sensitive adhesive, and preserving the ultraviolet curing pressure-sensitive adhesive in dark place. The invention employs photopolymerization to prepare the ultraviolet curing pressure-sensitive adhesive, the reaction rate is very fast and is not affected by temperature; the reaction process is controllable; no organic solvent is added to the reactants, the solid content is 100%, and the environmental pollution is reduced.

Description

Technical field [0001] The present invention relates to a preparation method of ultraviolet curing pressure-sensitive adhesive, which is mainly applied to various types of tapes for packaging and packaging, various sanitary products, such as sanitary napkins, diapers, etc., and various commercial labels. Medical supplies, such as band-aids, infusion patches, adhesive plasters, medical tapes, etc., transparent adhesive papers of various colors used in daily production and life, and electronic products such as mobile phones and computers. Background technique [0002] As the world pays more and more attention to environmental protection issues, the traditional pressure-sensitive adhesive process has changed from solvent-based to water-emulsion type. However, water-emulsion type has disadvantages such as high energy consumption and reduced performance, while hot-melt type process does not require Solvent, but high energy consumption, pressure sensitive adhesive has poor creep resist...

Claims

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Application Information

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IPC IPC(8): C09J133/08C08F220/18C08F220/14C08F220/06
Inventor 王艳解一军樊芳解月伟
Owner HEBEI UNIV OF TECH
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