Low-volatility UV curing optical structural adhesive and preparation method thereof

A low-volatility, optical structure technology, applied in adhesives, non-polymer organic compound adhesives, non-polymer adhesive additives, etc., can solve the problem of reducing the content of active diluents, low volatility of optical structural adhesive materials, etc. problem, achieve the effect of reducing the residue of small molecular substances, avoiding the difference in curing degree, and reducing the proportion of addition

Active Publication Date: 2019-02-15
DONGGUAN POWERBOND NEW MATERIALS TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on this, the present invention overcomes the defects of the prior art and provides a low-volatility UV-curable optical structural adhesive, which uses polyacrylate with a specific molecular weight and molecular weight distribution as the main resin , this type of resin is easily diluted by reactive diluents, which reduces the content of small molecular oligomers in the resin and the content of reactive diluents in the formula, thereby realizing the low volatility of optical structural adhesive materials, and finally effectively solving the problem of foreign matter in optical structural parts. Pollution causes its performance to decline, improving the reliability and product quality of optical structural parts

Method used

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  • Low-volatility UV curing optical structural adhesive and preparation method thereof
  • Low-volatility UV curing optical structural adhesive and preparation method thereof
  • Low-volatility UV curing optical structural adhesive and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0039] A low-volatility UV-curable optical structural adhesive, comprising the following components calculated by mass percentage:

[0040]

[0041]

[0042] The RAFT polyacrylate resin described in this implementation is prepared by the following method:

[0043] (1) Add 2g thermal initiator (AIBN), 0.3gRAFT reagent and 500mL xylene into a four-necked flask with stirrer, temperature control device and nitrogen protection device;

[0044] (2) Warm up to 90°C, gradually add 80g of isooctyl acrylate and 20g of 2-phenoxyethyl acrylate dropwise, control the dropping speed, the monomer dropping time is 4 hours, and then continue to react for 3h;

[0045] (3) After the polymerization reaction is complete, 0.1 g of N,N dimethyldipropyltriamine is added to decolorize the resin, and finally the solvent is evaporated to obtain a colorless and transparent viscous resin RAFT polyacrylate resin.

[0046] Get 2g of the prepared colorless and transparent viscous resin RAFT polyacrylat...

Embodiment 2

[0053] A low-volatility UV-curable optical structural adhesive, its composition and preparation method are similar to Example 1, the difference is that the RAFT polyacrylate resin used in Example 2 is different from Example 1, and the RAFT polyacrylate resin used in Example 2 The synthesis process of RAFT polyacrylate resin is as follows:

[0054] (1) Add 2g thermal initiator (AIBN), 0.3gRAFT reagent and 500mL xylene into a four-necked flask with stirrer, temperature control device and nitrogen protection device;

[0055] (2) Heat up to 90°C, gradually add 60g of decyl acrylate and 20g of piperidine ethyl acrylate dropwise, control the rate of addition, the monomer addition time is 4 hours, and then continue the reaction for 3h;

[0056] (3) After the polymerization reaction is complete, 0.1 g of N,N dimethyldipropyltriamine is added to decolorize the resin, and finally the solvent is evaporated to obtain a colorless and transparent viscous resin RAFT polyacrylate resin.

[0...

Embodiment 3

[0059] A low-volatility UV-curable optical structural adhesive, its composition and preparation method are similar to Example 1, the difference is that the RAFT polyacrylate resin used in Example 3 is different from Example 1, and the RAFT polyacrylate resin used in Example 3 The synthesis process of RAFT polyacrylate resin is as follows:

[0060] (1) Add 2g thermal initiator (AIBN), 0.2gRAFT reagent and 500mL xylene into a four-necked flask with stirrer, temperature control device and nitrogen protection device;

[0061] (2) Warm up to 90°C, gradually add 90g of isooctyl acrylate and 20g of 2-phenoxyethyl acrylate dropwise, control the dropping rate, the monomer dropping time is 4 hours, and then continue to react for 3h;

[0062] (3) After the polymerization reaction is complete, 0.1 g of N,N dimethyldipropyltriamine is added to decolorize the resin, and finally the solvent is evaporated to obtain a colorless and transparent viscous resin RAFT polyacrylate resin.

[0063] T...

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Abstract

The invention discloses a low-volatility UV curing optical structural adhesive and a preparation method thereof. The optical structural adhesive comprises the following components in percentage by weight: 60-85 percent of polyacrylate resin, 10-30 percent of a reactive diluent, 0.5-3 percent of a photo-initiator, 1-10 percent of a nano-filler and 0.1-2 percent of an auxiliary; the polyacrylate resin is polyacrylate of which the number-average molecular weight is 5000-20000, and the molecular weight distribution is below 1.40. The low-volatility UV curing optical structural adhesive disclosed by the invention uses the polyacrylate with specific molecular weight and molecular weight distribution as matrix resin; the resin is easy to dilute by the reactive diluent, so that the content of small molecule oligomers in the resin and the content of monomers in a formula are reduced. Therefore, the low volatility of the optical structural adhesive is realized, the problem that the performance of an optical structure part is reduced due to foreign matter pollution is finally solved, and the reliability of the optical structure part and the product quality are improved.

Description

technical field [0001] The invention relates to the field of adhesives, in particular, the invention relates to a low-volatility ultraviolet-curable optical structural adhesive and a preparation method thereof. Background technique [0002] With the development of electronic products in the direction of thinner and smarter, the traditional mechanical fixing method has been difficult to meet the assembly and production of optical components, and the use of adhesive bonding technology is a new trend. Adhesives are widely used as structural bonding in optical components of electronic products. Adhesives are generally polymer materials, and the volatile substances generated during use often pollute optical components and affect imaging quality. , especially the imaging quality under the application conditions of high and low temperature changes. [0003] In the existing adhesive bonding technology, there are mainly several ways to bond optical structural parts: one is to use ep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/02C09J4/06C09J11/04C09J11/06
CPCC09J4/06C09J11/04C09J11/06
Inventor 吴博胡联灵张亚平庞晓东刘兆辉
Owner DONGGUAN POWERBOND NEW MATERIALS TECH DEV
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