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UV-cured acrylic pressure-sensitive adhesive and preparation method thereof

A technology of acrylate and butyl acrylate, used in adhesives, non-polymer organic compound adhesives, non-polymer adhesive additives, etc., can solve the problem of no viscosity control, difficult to control molecular weight and distribution, and difficult to coat and other problems, to achieve the effect of less coating amount, low photocuring shrinkage rate and good stability

Active Publication Date: 2015-05-06
YANTAI DARBOND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are still some defects in this technical solution: first, the described system formula is relatively difficult to control the molecular weight and distribution, which has a direct impact on the performance of the product; secondly, the viscosity has a direct impact on the gluing process, but among them There is basically no viscosity control, and it is difficult to achieve uniform coating

Method used

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  • UV-cured acrylic pressure-sensitive adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-8

[0023] Using the industrial-grade reagent raw materials (weight unit kg) listed in the following table, add butyl acrylate, methyl methacrylate, and hydroxyethyl acrylate into the reaction kettle, turn on and stir, and add the initiator azodicarbonate dropwise while heating up. Isobutyronitrile, react for 1.5 hours between 70 and 90 ℃, then add acrylic acid, molecular weight regulator, viscosity regulator and light curing agent, and pass nitrogen as protective gas, maintain the reaction temperature at 75-80 ℃, and react for 45 minutes To 1 hour, the final discharge.

[0024]

[0025] Viscosity test: use a Brkfield DV-E rotational viscometer to test the viscosity of the sample, weigh 10.0 g of the adhesive sample prepared in Examples 1-8, and test it after curing by ultraviolet irradiation. During the test, a rotor with a model of S27 is selected. Control the temperature at 25°C, and continuously adjust the rotation rate so that the test value is within the linear range of...

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Abstract

The invention discloses a UV-cured acrylic pressure-sensitive adhesive. The pressure-sensitive adhesive has a viscosity of 5000-8500 CPS at a normal temperature and prepared by compounding the following raw materials in parts by weight: 20-50 parts of butyl acrylate, 10-40 parts of methyl methacrylate, 10-30 parts of hydroxyethyl acrylate, 1-5 parts of acrylic acid, 0.4-0.8 part of a molecular weight regulator, 0.6-1.2 parts of azodiisobutyronitrile, 0.1-1 part of a viscosity regulator and 0.1-1 part of a light curing agent. Compared with the prior art, the UV-cured acrylic pressure-sensitive adhesive provided by the invention has the advantages that the solid content is 100%, the performances of a common solvent-type pressure-sensitive adhesive can be achieved as long as the coating thickness is 30 microns, the coating amount is low, and the cost and the energy consumption are reduced; because the viscosity ranges from 6000 to 6500CPS, the UV-cured acrylic pressure-sensitive adhesive is suitable for a traditional scrape-coating process; a photoinitiator in the adhesive is synthesised onto the molecular chain of glue water, so that the stability is good, and the photocuring shrinkage rate is low.

Description

technical field [0001] The invention relates to the technical field of acrylic pressure-sensitive adhesives, in particular to a UV-curable acrylate pressure-sensitive adhesive. technical background [0002] With the development of society, the requirements of energy saving and environmental protection have been paid more and more attention. In today's tape industry, there are still many tape companies using solvent-based pressure-sensitive adhesives and water-based pressure-sensitive adhesives, which has brought great pressure to the environment. [0003] At present, domestic small-molecule UV-cured solvent-free acrylic pressure-sensitive adhesives are difficult to popularize and apply due to insufficient curing degree, large curing shrinkage, and difficulty in coating. [0004] The Chinese invention patent publication No. 102449094A discloses a UV-curable acrylic pressure-sensitive adhesive and a method of using the same, which has the following components: 30-50 parts by m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/02C09J4/06C09J11/08C09J11/06C09J11/04
Inventor 王学刚王建斌陈田安解海华
Owner YANTAI DARBOND TECH
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