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UV-cured hot-melt acrylate pressure-sensitive adhesive and electrical adhesive tape prepared from same

An acrylate, curing heat technology, applied in the field of pressure-sensitive adhesives, can solve the problems of residual photoinitiator, poor polymer compatibility, easy aging and yellowing of cured products, etc., to reduce the interaction and improve the initial viscosity.

Inactive Publication Date: 2021-03-12
广东硕成科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the small molecule photoinitiator in the traditional UV curing system has poor compatibility with the polymer, resulting in residual photoinitiator, easy migration and volatilization of photolytic fragments, easy aging and yellowing of cured products, and easy occurrence of odor and toxicity, etc. problems, thus affecting the performance of the light curing system and restricting its application

Method used

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  • UV-cured hot-melt acrylate pressure-sensitive adhesive and electrical adhesive tape prepared from same

Examples

Experimental program
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preparation example Construction

[0030] The preparation method of described macromolecular weight photoinitiator is as follows:

[0031] Equimolar amounts of 4-hydroxybenzophenone, MDI, and 2-hydroxyethyl acrylate were respectively prepared into toluene solutions with a mass fraction of 50%. At 70-80°C, add the toluene solution of MDI into a three-necked flask placed in a constant temperature water bath, protect it with nitrogen, and add dibutyltin dilaurate (accounting for 0.4% of the total amount of reactants) drop by drop at an appropriate stirring speed. ) of 4-hydroxybenzophenone in toluene. Dropping is completed in about 1h. Then the temperature was increased by 10° C., and a toluene solution of 2-hydroxyethyl acrylate was added dropwise. Dropping is completed in about 1h. After cooling down to room temperature, the material is discharged and dried to obtain the polymerizable large molecular weight photoinitiator. Store the synthesized UV curing agent in a dry airtight container away from light.

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Embodiment 1

[0051] Example 1 provides a UV-curable hot-melt acrylate pressure-sensitive adhesive. The raw materials for its preparation include 40 parts of acrylic resin, 30 parts of tackifying resin, 7 parts of reactive diluent, and 7 parts of ethylenic monomer in parts by weight. 6 parts of softener, 1 part of antioxidant.

[0052] The acrylic resin is polymerized from 80 parts of acrylic acid, 15 parts of vinyl acetate and 0.5 part of initiator.

[0053] The photoinitiator is a polymerizable large molecular weight photoinitiator, and its preparation raw materials include: 4-hydroxybenzophenone, MDI, and 2-hydroxyethyl acrylate. The MDI is a mixture of 4,4'-diphenylmethane diisocyanate and 2,4'-diphenylmethane diisocyanate in a weight ratio of 1:1.

[0054] The preparation method of described polymerizable macromolecular weight photoinitiator is as follows:

[0055] Equimolar amounts of 4-hydroxybenzophenone, MDI, and 2-hydroxyethyl acrylate were respectively prepared into toluene sol...

Embodiment 2

[0068] Similar to Example 1, a UV-curable hot-melt acrylate pressure-sensitive adhesive and the electrical tape prepared thereof are provided, but its preparation raw materials include 20 parts of acrylic resin, 20 parts of tackifying resin, and reactive diluent in parts by weight. 2 parts, 2 parts of vinyl monomer, 2 parts of softener, 0.1 part of antioxidant.

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Abstract

The invention provides a UV-cured hot-melt acrylate pressure-sensitive adhesive and an electrical adhesive tape prepared from the same, and the UV-cured hot-melt acrylate pressure-sensitive adhesive is prepared from the following raw materials in parts by weight: 20-60 parts of acrylic resin, 20-40 parts of a tackifying resin, 2-15 parts of a reactive diluent, 2-15 parts of an alkene monomer, 2-10parts of a softener and 0.1-2.0 parts of an antioxidant. The prepared pressure-sensitive adhesive and the prepared electrical adhesive tape have excellent initial viscosity, peel strength and persistent viscosity, and meanwhile, the acrylic resin in the pressure-sensitive adhesive is obtained by pre-polymerizing a polymerizable macromolecular photoinitiator, so that the problems that the photoinitiator is residual, photolysis fragments are easy to migrate and volatilize, a cured product is easy to age and yellow, smell and toxicity are easy to occur and the like are solved.

Description

technical field [0001] The invention relates to pressure-sensitive adhesive technology, in particular to a UV-cured hot-melt acrylate pressure-sensitive adhesive and an electrical tape prepared therefrom. Background technique [0002] Electrical tape specifically refers to the tape used by electricians to prevent leakage and insulate. It has good insulation voltage resistance, flame retardant, weather resistance, high peel strength and other characteristics, suitable for wire connection, electrical insulation protection and other characteristics. Electrical tape is generally composed of a PVC substrate and a pressure-sensitive adhesive coated on it. Traditional glue uses rubber-type glue, although it has good performance in terms of peel strength, but rubber-type glue will use solvents in the production process, such as toluene, and then dry the solvent after coating, there is a relatively large environmental protection problems, and cause relatively great harm to the heal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/06C09J4/02C09J11/06C09J7/38C09J7/24C08F220/06C08F218/08C08F220/36C08F2/48
CPCC09J4/06C09J11/06C09J7/38C09J7/385C09J7/245C08F220/06C08F2/48C09J2427/006C08F218/08C08F220/36
Inventor 柯跃虎宋亦健诸葛锋
Owner 广东硕成科技股份有限公司
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