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One-component epoxy adhesive capable of delayed curing induced by ultraviolet light and preparation method thereof

An epoxy adhesive, one-component technology, used in epoxy resin adhesives, adhesives, adhesive additives, etc., can solve the problems of cumbersome sizing, high process operation requirements, difficult to effectively cure, etc., and achieves convenient use and operation. simple craftsmanship

Active Publication Date: 2016-05-11
YANTAI SEAYU NEW MATERIALS CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to effectively cure the parts that are not irradiated by ultraviolet light and the materials that are opaque.
Moreover, many fields require a certain operating time after gluing. Obviously, the current UV-curable adhesives cannot meet this requirement. Although some epoxy adhesives meet these requirements, their sizing is cumbersome and requires high process operations.

Method used

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  • One-component epoxy adhesive capable of delayed curing induced by ultraviolet light and preparation method thereof
  • One-component epoxy adhesive capable of delayed curing induced by ultraviolet light and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1, at first carry out the self-made of quaternary ammonium salt photobase generator: the acetone solution of α-bromoacetophenone and TAP is reacted at room temperature and makes bromide quaternary ammonium salt, and the product is filtered and dried, recrystallized, then dissolved Perform anion exchange reaction with sodium tetraphenylborate in distilled water at room temperature, and wash and dry the product with distilled water to obtain anion quaternary ammonium salt paired with tetraphenylboron.

Embodiment 2

[0016] After mixing 30g of bisphenol A epoxy resin, 25g of bisphenol F epoxy resin, 10g of modified nitrile rubber, 5g of styrene-butadiene rubber, 10g of polyurethane modified acrylic resin, SiO25g, and Al(OH)35g, put into the reaction Stir in the kettle at 25°C for 2 hours to make it a uniform liquid, then add 10 g of quaternary ammonium salt photobase generator strictly away from light, stir for 1 hour, discharge, centrifuge, and seal the package. Set aside.

Embodiment 3

[0018] After mixing 25g of bisphenol A epoxy resin, 30g of bisphenol F epoxy resin, 10g of modified nitrile rubber, 10g of polyurethane modified acrylic resin, and 25g of SiO, put it into the reaction kettle and stir for 2 hours at 25°C to make it Become a uniform liquid, then add 15g of quaternary ammonium salt photobase generator strictly in the dark, stir for 1 hour, discharge, centrifuge, and seal the package. Set aside.

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Abstract

The invention relates to a UV-initiated delay-curable one-component epoxy adhesive. The adhesive is prepared from the following raw materials in percentages by weight: 30-60% of epoxy resin, 5-30% of a homemade quaternary photobase generator, 10-30% of a toughening agent and 5-20% of a filling agent, wherein the homemade quaternary photobase generator is synthesized from the following components of alpha-bromoacetophenone, terephthalic acid (TPA) and sodium tetraphenylborate by the following processes: reacting alpha-bromoacetophenone and an acetone liquid of terephthalic acid (TPA) at room temperature to prepare bromo-quaternary ammonium salt, filtering, drying and recrystallizing the product to obtain a crystal substance, dissolving the crystal substance in distilled water and carrying out anion exchange reaction on the distilled water with the crystal substance and sodium tetraphenylborate at room temperature to obtain a product, washing the product with distilled water and drying to obtain anion quaternary ammonium salt paired with tetraphenylborate. Compared with the prior art, the curing speed can be delayed to 30 minutes-60 minutes, the process is simple, neither heat curing nor mixing is needed, the adhesive is environmentally friendly and is convenient to use and is also simultaneously suitable for multiple opaque materials and can be widely used in the field of structural bonding.

Description

technical field [0001] The invention belongs to the technical field of structural bonding, and in particular relates to a one-component epoxy adhesive initiated by ultraviolet light and capable of delayed curing and a preparation method. Background technique [0002] As we all know, UV-curable adhesives have some outstanding features such as good compatibility, high strength, and environmental protection, so they are widely used in the fields of optics, electronic appliances, and digital discs. However, the curing of UV-curable adhesives also has certain limitations. It requires that the material has no shielding from light objects, has strong light transmission, and will achieve a curing effect within a short time after exposure to light. Therefore, it is difficult to effectively cure the parts that are not irradiated by ultraviolet light and the materials that are opaque. Moreover, many fields require a certain operating time after gluing. Obviously, the current UV-curab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J163/00C09J11/08C09J11/04
Inventor 李不悔贺国新
Owner YANTAI SEAYU NEW MATERIALS CORP LTD
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