阅读说明：本技术 一种超厚的oca胶水及其制备方法 (Super-thick OCA glue and preparation method thereof ) 是由 姜欣 黄新波 于 2019-05-10 设计创作，主要内容包括：本发明公开了一种超厚的OCA胶水及其制备方法,OCA胶水组份按重量份数包括丙烯酸异辛酯聚合物30-60份、丙烯酸丁酯聚合物20-40份、甲基丙烯酸异冰片酯5-10份、petat3-5份,光引发剂819 1-2份、光引发剂184 0.1-2份、甲基纤维素2-6份、硅溶胶6-12份、抗氧剂1-3份,本发明制备方法简单,制得的OCA胶水固化速度快,既有良好的稳定性能,又可以有很好的填补段差功能,而且耐候性好,不会随着温度等变化而产生黄变,胶层颜色不变。(The invention discloses super-thick OCA glue and a preparation method thereof, wherein the OCA glue comprises, by weight, 30-60 parts of isooctyl acrylate polymer, 20-40 parts of butyl acrylate polymer, 5-10 parts of isobornyl methacrylate, pet 3-5 parts of photoinitiator, 8191-2 parts of photoinitiator, 1840.1-2 parts of photoinitiator, 2-6 parts of methyl cellulose, 6-12 parts of silica sol and 1-3 parts of antioxidant.)

1. The utility model provides an OCA glue of super thick which characterized in that: the OCA glue comprises, by weight, 30-60 parts of isooctyl acrylate polymer, 20-40 parts of butyl acrylate polymer, 5-10 parts of isobornyl methacrylate, 3-5 parts of pet, 8191-2 parts of photoinitiator, 1840.1-2 parts of photoinitiator, 2-6 parts of methyl cellulose, 6-12 parts of silica sol and 1-3 parts of antioxidant.

2. The ultra-thick OCA glue of claim 1, wherein: the optimized component proportion of the OCA glue comprises 45 parts of isooctyl acrylate polymer, 30 parts of butyl acrylate polymer, 8 parts of isobornyl methacrylate, 4 parts of petat, 8192 parts of photoinitiator, 1841 parts of photoinitiator, 4 parts of methyl cellulose, 9 parts of silica sol and 2 parts of antioxidant.

3. The ultra-thick OCA glue of claim 1, wherein: the silica sol adopts a siloxane coupling agent modified nano-silica dispersion liquid.

4. The ultra-thick OCA glue of claim 1, wherein: the antioxidant is one or a mixture of more of antioxidant 1010, antioxidant 1089 and antioxidant 164.

5. The preparation method of the super-thick OCA glue of the claim 1 is realized, and is characterized in that: the preparation method comprises the following steps:

A. mixing isobornyl methacrylate, petat, a photoinitiator 819, a photoinitiator 184, methylcellulose and an antioxidant, adding the mixture into a stirring tank, and stirring at a low speed of 200-400 rpm for 10-20 min to obtain a mixture A;

B. mixing isooctyl acrylate polymer, butyl acrylate polymer and isobornyl methacrylate, adding the mixture into a mixing roll for mixing, and adding a mixing agent A and silica sol in the mixing process to obtain a mixing agent B;

C. and (3) putting the mixture B into a reaction kettle for heating reaction at the temperature of 75-95 ℃ for 6-8 h, preserving the temperature for 30min, and cooling to room temperature to obtain the OCA glue.

6. The method for preparing the ultra-thick OCA glue according to claim 5, wherein the method comprises the following steps: the mixing temperature in the step B is 180-210 ℃, and the mixing time is 6-12 min.

Technical Field

The invention relates to the technical field of OCA glue preparation, in particular to super-thick OCA glue and a preparation method thereof.

Background

The OCA is used for special adhesives for cementing transparent optical elements (such as lenses and the like). It has the characteristics of colorless transparency, light transmittance of more than 90 percent, good cementing strength, capability of being cured at room temperature or middle temperature, small curing shrinkage and the like.

The existing OCA glue has poor weather resistance and is easy to have yellowing phenomenon.

Disclosure of Invention

The invention aims to provide an ultra-thick OCA glue and a preparation method thereof, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the components of the super-thick OCA glue comprise, by weight, 30-60 parts of isooctyl acrylate polymer, 20-40 parts of butyl acrylate polymer, 5-10 parts of isobornyl methacrylate, 5-5 parts of petat3, 8191-2 parts of photoinitiator, 1840.1-2 parts of photoinitiator, 2-6 parts of methyl cellulose, 6-12 parts of silica sol and 1-3 parts of antioxidant.

Preferably, the preferable component proportion of the OCA glue component comprises 45 parts of isooctyl acrylate polymer, 30 parts of butyl acrylate polymer, 8 parts of isobornyl methacrylate, 4 parts of pet, 8192 parts of photoinitiator, 1841 parts of photoinitiator, 4 parts of methyl cellulose, 9 parts of silica sol and 2 parts of antioxidant.

Preferably, the silica sol adopts a siloxane coupling agent modified nano-silica dispersion liquid.

Preferably, the antioxidant is one or a mixture of more of antioxidant 1010, antioxidant 1089 and antioxidant 164.

Preferably, the preparation method comprises the following steps:

A. mixing isobornyl methacrylate, petat, a photoinitiator 819, a photoinitiator 184, methylcellulose and an antioxidant, adding the mixture into a stirring tank, and stirring at a low speed of 200-400 rpm for 10-20 min to obtain a mixture A;

B. mixing isooctyl acrylate polymer, butyl acrylate polymer and isobornyl methacrylate, adding the mixture into a mixing roll for mixing, and adding a mixing agent A and silica sol in the mixing process to obtain a mixing agent B;

C. and (3) putting the mixture B into a reaction kettle for heating reaction at the temperature of 75-95 ℃ for 6-8 h, preserving the temperature for 30min, and cooling to room temperature to obtain the OCA glue.

Preferably, the mixing temperature in the step B is 180-210 ℃, and the time is 6-12 min.

Compared with the prior art, the invention has the beneficial effects that: the preparation method is simple, the prepared OCA glue is high in curing speed, has good stability, can have a good function of filling up segment difference, is good in weather resistance, cannot be yellowed along with the change of temperature and the like, and the color of a glue layer is not changed; the silica sol added in the invention provides a microporous structure for the OCA glue, and the density of the OCA optical adhesive film is reduced, so that the aim of reducing the dielectric constant is fulfilled, and the yellowing resistance and the aging resistance of the OCA optical adhesive film are further improved; in addition, the thickness of the OCA glue layer can be from 0.5mm to 3 mm.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides the following technical scheme: the components of the super-thick OCA glue comprise, by weight, 30-60 parts of isooctyl acrylate polymer, 20-40 parts of butyl acrylate polymer, 5-10 parts of isobornyl methacrylate, 5-5 parts of petat3, 8191-2 parts of photoinitiator, 1840.1-2 parts of photoinitiator, 2-6 parts of methyl cellulose, 6-12 parts of silica sol and 1-3 parts of antioxidant; wherein, the silica sol adopts siloxane coupling agent modified nano-silica dispersion liquid.