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Optical adhesive with low gel fraction and preparation method thereof

An optical adhesive, low-gel technology, used in adhesives, adhesive types, ester copolymer adhesives, etc., can solve the problem of uncontrollable and accurate control of the gel fraction of optical adhesives, etc. question

Inactive Publication Date: 2021-10-01
世星科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The gel fraction of existing optical adhesives is uncontrollable. When optical adhesives with different gel fractions are required, it is not easy to control accurately

Method used

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  • Optical adhesive with low gel fraction and preparation method thereof

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preparation example Construction

[0013] A method for preparing an optical adhesive with a low gel fraction, comprising the steps of:

[0014] Step 1: Mix 0-80 parts of isooctyl acrylate, 0-30 parts of hydroxyethyl acrylate, 0-15 parts of isobornyl acrylate, 0-5 parts of isocyanate ethyl acrylate and 0-0.5 parts of light The initiator is mixed to obtain an optical prepolymer;

[0015] Step 2: adding 0-1 part of multifunctional monomer to the optical prepolymer obtained in step 1, coating on the base film, and then irradiating with UV light;

[0016] Step 3: irradiating and reacting the coated base film under UV light to obtain an optical adhesive film.

[0017] Step 4: heat the coated optical adhesive film at 40-120°C for 12h-72h to carry out deep curing and cross-linking.

Embodiment 1

[0019] An optical adhesive with a low gel fraction, consisting of the following substances in parts by mass: 80 parts of isooctyl acrylate, 10 parts of hydroxyethyl acrylate, 10 parts of isobornyl acrylate and 0.5 parts of 1-hydroxy - cyclohexylbenzophenone.

[0020] A method for preparing an optical adhesive with a low gel fraction, comprising the steps of:

[0021] Step 1: Mix 80 parts of isooctyl acrylate, 10 parts of hydroxyethyl acrylate, 10 parts of isobornyl acrylate, and 0.5 parts of 1-hydroxy-cyclohexylbenzophenone to obtain an optical prepolymer;

[0022] Step 2: adding 0.2 parts of (2,4,6-trimethylbenzoyl)phenylphosphine oxide into the optical prepolymer, coating on the base film, and then irradiating with UV light;

[0023] Step 3: irradiating the coated base film under UV light, reacting and curing to obtain an optical adhesive film.

[0024] Step 4: heat the coated optical adhesive film at 100° C. for 70 hours to perform deep curing and cross-linking.

Embodiment 2

[0026] An optical adhesive with a low gel fraction, consisting of the following substances in parts by mass: 80 parts of isooctyl acrylate, 10 parts of hydroxyethyl acrylate, 10 parts of isobornyl acrylate, 0.1 part of isocyanate acrylic acid ethyl ester and 0.5 parts of 1-hydroxy-cyclohexylbenzophenone.

[0027] A method for preparing an optical adhesive with a low gel fraction, comprising the steps of:

[0028] Step 1: Mix 80 parts of isooctyl acrylate, 10 parts of hydroxyethyl acrylate, 10 parts of isobornyl acrylate and 0.5 parts of 1-hydroxyl-cyclohexylbenzophenone to obtain a low gel fraction optical adhesive mixture;

[0029] Step 2: Add 0.2 parts by mass of (2,4,6-trimethylbenzoyl) phenylphosphine oxide and 0.05 parts of trimethylolpropane triacrylate into the adhesive, on the base film Coating is carried out, followed by UV light irradiation;

[0030] Step 3: irradiating the coated base film under UV light, reacting and curing to obtain an optical adhesive film.

...

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Abstract

The invention discloses an optical adhesive with low gel fraction. The optical adhesive is prepared from the following substances: 0 to 80 parts of 2-ethylhexyl acrylate, 0 to 30 parts of hydroxyethyl acrylate, 0 to 15 parts of isobornyl acrylate, 0 to 5 parts of isocyanate ethyl acrylate and 0 to 0.5 part of a photoinitiator. The invention relates to a preparation method of an optical adhesive with low gel fraction. The preparation method comprises the following steps: 1, mixing 0-80 parts of 2-ethylhexyl acrylate, 0-30 parts of hydroxyethyl acrylate, 0-15 parts of isobornyl acrylate, 0-5 parts of isocyanate ethyl acrylate and 0-0.5 part of the photoinitiator to obtain an optical prepolymer; 2, adding a polyfunctional group monomer into the optical prepolymer, coating on a base film, and then carrying out UV light irradiation; and 3, irradiating the coated base film under UV light, reacting and curing to obtain the optical adhesive film; 4, carrying out heat preservation on the coated optical adhesive film at 40-120 DEG C for 12-72 hours, and carrying out deep curing crosslinking. The gel fraction of the optical adhesive can be controlled according to different requirements, so that the optical adhesive can adapt to different requirements.

Description

technical field [0001] The invention relates to the field of optical adhesives, in particular to an optical adhesive with low gel fraction and a preparation method thereof. Background technique [0002] The gel fraction of existing optical adhesives is uncontrollable, and it is not easy to control accurately when optical adhesives with different gel fractions are required. Contents of the invention [0003] The technical problem to be solved by the invention is to provide a low gel fraction optical adhesive whose gel fraction can be controlled according to different needs and a preparation method thereof. [0004] The technical solution adopted by the present invention to solve the technical problem is: a low gel fraction optical adhesive, which is composed of the following substances in parts by mass: 0-80 parts of isooctyl acrylate, 0-30 parts of acrylic acid Hydroxyethyl ester, 0-15 parts of isobornyl acrylate, 0-5 parts of isocyanate ethyl acrylate and 0-0.5 parts of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/08C09J7/30C08F220/18C08F220/20C08F220/36C08F2/48
CPCC09J133/066C09J7/30C08F220/1808C08F2/48C09J2433/00C08F220/20C08F220/1811C08F220/36
Inventor 刘晓阳李立明金成国武小伟吴鹏磊
Owner 世星科技股份有限公司
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