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A kind of ultraviolet curing adhesive and preparation method thereof

A UV and adhesive technology, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the problem of difficult deep curing of UV curing adhesives, limited UV penetration depth, and difficult to fully cure the adhesive layer. problem, to achieve the effect of "eliminating oxygen resistance", excellent cohesive energy, and improving strength

Active Publication Date: 2016-08-24
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the use of α-cyanoacrylate substances in the prior art will cause certain health hazards to operators; at the same time, unsaturated resin is used as the matrix resin, and the glue layer of the UV-curable adhesive is caused due to the relatively thick glue layer. It is difficult to cure completely, and the penetration depth of ultraviolet rays is limited, coupled with the "oxygen inhibition" effect, it is difficult to cure deep UV curing adhesives, resulting in poor bonding performance of the adhesive layer

Method used

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  • A kind of ultraviolet curing adhesive and preparation method thereof
  • A kind of ultraviolet curing adhesive and preparation method thereof
  • A kind of ultraviolet curing adhesive and preparation method thereof

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preparation example Construction

[0036] The invention provides a preparation method of polydimethylsiloxane mercapto carboxylate, which is characterized in that it comprises the following steps: preparing hydroxyl-terminated polydimethylsiloxane, carboxylic acid containing mercapto group, p-toluenesulfonic acid and an organic solvent that does not contain active hydrogen atoms to obtain polydimethylsiloxane mercapto carboxylate.

[0037]The carboxylic acid containing mercapto is preferably mercaptopropionic acid or mercaptoacetic acid; the organic solvent without active hydrogen atoms is preferably toluene, xylene, cyclohexanone, acetone or butanone, more preferably toluene, cyclohexanone or butanone; the number average molecular weight of the hydroxyl-terminated polydimethylsiloxane is preferably 1000 to 4000, more preferably 2000 to 3000; the hydroxyl-terminated polydimethylsiloxane, carboxylic acid containing mercapto, The mass ratio of p-toluenesulfonic acid and the organic solvent not containing active h...

Embodiment 1

[0074] Preparation of High Functional Polyurethane Acrylate

[0075] (a) Under the protection of nitrogen, add 100g number-average molecular weight to the three-necked bottle that is 1000 hydroxyl-terminated polybutadiene liquid rubber and 50g number-average molecular weight is the polybutylene adipate diol of 1000, is heated to 110 ℃, dehydrate at -0.98MPa for 1 hour, then lower the temperature to 75℃, under nitrogen protection, add 0.12g dibutyltin dilaurate and 10.6g trimethylolpropane, add 68g of 2,4 - Toluene diisocyanate, after the dropwise addition, reacted for 2 hours to obtain the first intermediate.

[0076] (b) Under the protection of nitrogen, the first intermediate obtained by the above reaction was warmed up to 85° C., and reacted for 1 hour; then 0.46 g of p-hydroxyanisole was added, and 130 g of pentaerythritol triacrylate was added dropwise at a speed of 6 ml / min, After the dropwise addition was completed, the reaction was continued for 2 hours to obtain a hi...

Embodiment 2

[0078] Preparation of High Functional Polyurethane Acrylate

[0079] (a) Under the protection of nitrogen, add 320g number average molecular weight to the three-necked bottle that is the polybutylene adipate diol that the number average molecular weight of 5000 is 5000 and the polybutylene adipate diol that 106g number average molecular weight is 6000, is heated to 120 ℃, dehydrate at -0.98MPa for 3 hours, lower the temperature to 80°C, under nitrogen protection, add 0.56g stannous octoate and 18.1g trimethylolpropane, drop 140g diphenylmethane-4 at a speed of 10ml / min, 4-diisocyanate, after the dropwise addition, reacted for 4 hours to obtain the first intermediate.

[0080] (b) Under nitrogen protection, the first intermediate obtained by the above reaction was warmed up to 90° C., and reacted for 3 hours; then 0.72 g of hydroquinone was added, and 264 g of dipentaerythritol pentaacrylate was added dropwise at a speed of 15 ml / min, After the dropwise addition, the reaction ...

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Abstract

The invention provides an ultraviolet light polymerization adhesive and a preparation method thereof. The ultraviolet light polymerization adesive is prepared from the following components in parts by weight: 236-385 parts of polyurethane acrylate, 0.82-1.35 parts of polydimethylsiloxane mercapto acrylate, 43-82 parts of a monofunctional reactive diluent, 72-105 parts of a polyfunctional reactive diluent, 11.8-19.3 parts of a photoinitiator, 0.46-0.84 part of an ultraviolet light absorbent, 0.92-1.78 parts of a leveling agent, 1.03-1.92 parts of a foam killer and 0.48-0.86 part of a silane coupling agent. The ultraviolet light polymerization adhesive provided by the invention has better high-temperature impact resistance and excellent adhesion, has no cyano group, and is environment-friendly and nontoxic.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to an ultraviolet light curing adhesive and a preparation method thereof. Background technique [0002] Adhesives, also known as adhesives or adhesives, refer to organic or A class of substances that are inorganic, natural, or synthetic. The adhesive has the characteristics of continuous stress distribution, light weight, tightness, and low process temperature, and is especially suitable for the connection of different materials, different thicknesses, ultra-thin specifications, and complex components. [0003] Adhesives can be divided into light-curable, thermosetting, hot-melt, room temperature-curable, pressure-sensitive, etc. according to the application method. Among them, light-curable adhesives mainly include visible light, ultraviolet light and electron beam curing adhesives. At present, researchers The most concerned is the UV-curable adhesive. [0004] UV curable adhe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/392C09J175/14C09J11/08C08G18/69C08G18/67C08G18/66C08G18/42
Inventor 张红明赵强李季王献红王佛松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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