CN114316881A - High-adhesion polyurethane acrylic acid optical transparent adhesive - Google Patents
High-adhesion polyurethane acrylic acid optical transparent adhesive Download PDFInfo
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- CN114316881A CN114316881A CN202111648168.XA CN202111648168A CN114316881A CN 114316881 A CN114316881 A CN 114316881A CN 202111648168 A CN202111648168 A CN 202111648168A CN 114316881 A CN114316881 A CN 114316881A
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Abstract
The invention discloses a high-adhesion polyurethane acrylic acid optical transparent adhesive which is prepared from the following raw materials in parts by weight: 30-80 parts of urethane acrylate, 20-70 parts of reactive diluent, 1-5 parts of photoinitiator and 0.1-1 part of antioxidant, wherein the urethane acrylate is aliphatic urethane acrylate, the Tg point of the urethane acrylate is lower than-30 ℃, and the elongation is more than or equal to 100%. The optical transparent adhesive has good flexibility, high temperature and high humidity performance and good adhesive force.
Description
Technical Field
The invention relates to the technical field of bonding of touch screen sensors and touch screen components on liquid crystal modules in mobile equipment, flat panels and liquid crystal displays, in particular to a high-adhesion polyurethane acrylic acid optical transparent adhesive.
Background
The OCA adhesive tape commonly used in the market at present has corresponding requirements on the bonding surface and the product size, the laminating process difficulty is high, the product applicability is poor, the processing cost is high, the LOCA adhesive can overcome the limitation of the OCA adhesive tape, the OCA adhesive tape is suitable for laminating a complex laminating surface and a large-size product, the laminating process difficulty is low, the processing cost is low, and the OCA adhesive tape has obvious advantages and development prospects in the industry.
Conventional (B) isAlthough the LOCA adhesive has stable performance, the adhesive force is lower and is about 1.0N/mm2On the left and right sides, for some special products which need good optical flow performance and high bonding strength, the existing LOCA adhesive can not meet the use requirement, and even if the performance of the product in the aspect of adhesive force is adjusted, other performances can not be influenced. How to solve the above technical problems is the direction of research by those skilled in the art.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the polyurethane acrylic acid optical transparent adhesive with high adhesive force.
In order to achieve the purpose, the invention adopts the technical scheme that: the high-adhesion polyurethane acrylic acid optical transparent adhesive is prepared from the following raw materials in parts by weight: 30-80 parts of urethane acrylate, 20-70 parts of reactive diluent, 1-5 parts of photoinitiator and 0.1-1 part of antioxidant, wherein the urethane acrylate is aliphatic urethane acrylate, the Tg point of the urethane acrylate is lower than-30 ℃, and the elongation is more than or equal to 100%.
As a specific embodiment, the aliphatic polyurethane acrylate is selected from one or more of Gujing 3030Z, Gujing GU3001Z, Gujing GU3300Z, double bond 5400 and double bond 5040. Here, gujing 3030Z, gujing 3001Z and gujing 3300Z are all purchased from gujing chemical shares gmbh; the double bond 5400 and the double bond 5040 are both available from double bond chemical Co.
As a specific embodiment, the reactive diluent is not limited to one or more of tricyclodecane dimethanol diacrylate, hydroxypropyl methacrylate, lauric acid acrylate, ethoxyethoxyethyl acrylate.
As a specific embodiment, the photoinitiator is selected from one or more of 1-hydroxycyclohexyl phenyl ketone (184), 2-hydroxy-2-methyl-1-phenyl acetone (1173), 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide (TPO), bis (2,4, 6-trimethylbenzoyl) -phenyl oxide (819), Methyl Benzoylformate (MBF).
As a specific embodiment, the antioxidant is selected from one or more of cyanogen 1790, langsen BHT, basf 1726, basf 1010, and basf 1076.
As a specific embodiment, the composition is composed of the following raw materials in parts by weight: 50-70 parts of urethane acrylate, 30-50 parts of reactive diluent, 1-3 parts of photoinitiator and 0.1-0.4 part of antioxidant, wherein the Tg point of the urethane acrylate is lower than-35 ℃, and the elongation is more than or equal to 150%.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the high-adhesion polyurethane acrylic optical transparent adhesive is prepared from four components, namely polyurethane acrylate, a reactive diluent, a photoinitiator and an antioxidant, wherein the polyurethane acrylate is selected from aliphatic compounds, the Tg point of the polyurethane acrylate is lower than-30 ℃, the elongation is more than or equal to 100%, and the prepared optical transparent adhesive has the adhesion which is more than three times that of the conventional LOCA adhesive.
Detailed Description
The technical solution of the present invention is further illustrated below with reference to specific examples.
The high-adhesion polyurethane acrylic acid optical transparent adhesive is prepared from the following raw materials in parts by weight: 50-70 parts of urethane acrylate, 30-50 parts of reactive diluent, 1-3 parts of photoinitiator and 0.1-0.4 part of antioxidant, wherein the urethane acrylate is aliphatic urethane acrylate, the Tg point of the urethane acrylate is lower than-30 ℃, and the elongation is more than or equal to 100%.
Preferably, the aliphatic polyurethane acrylate is selected from one or more of Gujing 3030Z, Gujing 3001Z, Gujing GU3300Z, double bond 5400 and double bond 5040; the reactive diluent is not limited to one or more of tricyclodecane dimethanol diacrylate, hydroxypropyl methacrylate, lauric acid acrylate, ethoxy ethyl acrylate; the photoinitiator is selected from one or more of 1-hydroxycyclohexyl phenyl ketone (184), 2-hydroxy-2-methyl-1-phenyl acetone (1173), 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide (TPO), bis (2,4, 6-trimethylbenzoyl) -phenyl oxidation (819), Methyl Benzoylformate (MBF); the antioxidant is selected from one or more of cyanogen 1790, Langshan BHT, basf 1726, basf 1010 and basf 1076.
Effect of different contents of aliphatic urethane acrylate on LOCA adhesive Properties
Taking example 1 as an example, the high-adhesion polyurethane acrylic optical clear adhesive comprises 60 parts of Gujing 3030Z, 5.5 parts of hydroxypropyl methacrylate, 32 parts of lauric acrylate, 2 parts of 1-hydroxycyclohexyl phenyl ketone, 0.3 part of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide and 0.2 part of antioxidant 1076. The contents of the respective components in the remaining examples and comparative examples are shown in Table 1.
TABLE 1
The LOCA adhesive prepared from the components of each example in Table 1 was tested, and the test results are shown in Table 1.
Taking the example 1 as an example, the preparation process of the optical adhesive is that the aliphatic polyurethane acrylate, the reactive diluent, the photoinitiator and the antioxidant are mixed according to the formula proportion, heated to 40 ℃ and stirred uniformly.
The adhesion was tested as follows:
1) 2 pieces of common transparent glass with the specification of 50mm in length, 15mm in width and 5mm in thickness are adopted, the surface of the glass plate is cleaned by dipping alcohol on dust-free and dust-free cloth, and then the glass plate is placed for a period of time until the surface of the glass plate is completely dried;
2) then, dripping the obtained adhesive composition in the middle of a first piece of glass, pressing another piece of glass on the first piece of glass in a cross manner, controlling the thickness of the adhesive layer to be 120 mu m by a jig, and enabling the adhesive layer to be circular in the middle of the two pieces of glass, wherein the diameter of the adhesive layer is within 6-12 mm;
3) gently place the glass sample horizontally into a curing machine, set the UV power at 70mw/cm2The energy is 4500mj/cm2Carrying out UV curing;
4) standing the cured sample to a laboratory temperature;
5) the test is carried out by a tensile machine (2mm/min, 3 times of test, and the average value is calculated).
The remaining test items are shown in table 2.
Table 2:
from table 1, we can see that the higher the content of urethane acrylate, the better the adhesion of the glue and the higher the hardness, with the same content of other components. When the content of the urethane acrylate is more than 70 parts, as can be seen from examples 6 and 7, when the content of the urethane acrylate reaches 80 parts and 90 parts, the hardness of the glue reaches 60, which is too high, so that the flexibility of the product is too poor, and the ultraviolet aging resistance is poor; when the content of the urethane acrylate is less than 50 parts, the activity of the glue formula is poor, the glue cannot be completely cured, such as examples 2 and 3, and the high-temperature and high-humidity performance is poor. In the embodiment 1, the addition amount of the urethane acrylate is 60 parts, and the adhesive force reaches 3.2N/cm2The adhesive force of the conventional LOCA glue can be 3 times that of the conventional LOCA glue, the flexibility is still good, and the reliability test is OK. The recommended amount of urethane acrylate is therefore between 50 parts and 70 parts, preferably 60 parts, without changing the content of other components.
Effect of different kinds of aliphatic urethane acrylates on LOCA adhesive Properties
Taking example 8 as an example, the high-adhesion polyurethane acrylic optical clear adhesive comprises 60 parts of Gu3030Z, 10 parts of hydroxypropyl methacrylate (HPMA), 10 parts of Lauric Acrylate (LA), 3 parts of 1-hydroxycyclohexyl phenyl ketone and 0.5 part of antioxidant basf 1010. The contents of the respective components in the remaining examples and comparative examples are shown in Table 3.
TABLE 3
As can be seen from Table 3, the aliphatic urethane acrylates used in examples 8 to 13 have low hardness, good flexibility and good reliability, while the non-aliphatic urethane acrylates used in comparative example 1 have high TG point and low elongation, resulting in a glue having high hardness, poor flexibility and poor reliability. Thus, an aliphatic urethane acrylate having a low TG point and a high elongation is preferably selected.
Influence of diluents of different kinds and contents on the properties of LOCA gum
Taking example 13 as an example, the high-adhesion polyurethane acrylic optical clear adhesive comprises 90 parts of Gujing Kogyo Gu3030Z, 15 parts of hydroxypropyl methacrylate (HPMA), 10 parts of Lauric Acrylate (LA), 2 parts of photoinitiator 184 and 0.1 part of antioxidant basf 1726. The contents of the respective components in the remaining examples and comparative examples are shown in Table 4.
TABLE 4
From table 4, it can be seen that the reactive diluents selected in examples 14 to 19 are all compatible reactive diluents, and the reactive diluents in comparative example 2 are poor in compatibility with the selected urethane acrylate, and are easy to generate turbidity, so that the glue has high haze and poor reliability. Preference is therefore given to using well-compatible reactive diluents such as lauric acid acrylate, ethoxyethoxyethyl acrylate, tricyclodecane dimethanol diacrylate and hydroxypropyl methacrylate.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (6)
1. The high-adhesion polyurethane acrylic optical transparent adhesive is characterized by comprising the following raw materials in parts by weight: 30-80 parts of urethane acrylate, 20-70 parts of reactive diluent, 1-5 parts of photoinitiator and 0.1-1 part of antioxidant, wherein the urethane acrylate is aliphatic urethane acrylate, the Tg point of the urethane acrylate is lower than-30 ℃, and the elongation is more than or equal to 100%.
2. The high-adhesion polyurethane acrylic optically clear adhesive according to claim 1, wherein the aliphatic polyurethane acrylate is selected from one or more of Gujing 3030Z, Gujing GU3001Z, Gujing GU3300Z, double bond 5400 and double bond 5040.
3. The high adhesion polyurethane acrylic optical clear adhesive according to claim 1, wherein the reactive diluent is not limited to one or more of tricyclodecane dimethanol diacrylate, hydroxypropyl methacrylate, lauric acid acrylate, ethoxy ethyl acrylate.
4. The high adhesion polyurethane acrylic optical clear adhesive according to claim 1, wherein the photoinitiator is selected from one or more of 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenyl acetone, 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide, bis (2,4, 6-trimethylbenzoyl) -phenyl phosphine oxide, and methyl benzoylformate.
5. The high adhesion polyurethane acrylic optically clear adhesive according to claim 1, wherein the antioxidant is selected from one or more of Cyanut 1790, Langshan BHT, Basf 1726, Basf 1010, and Basf 1076.
6. The high-adhesion polyurethane acrylic optical clear adhesive according to claim 1, which is prepared from the following raw materials in parts by weight: 50-70 parts of urethane acrylate, 30-50 parts of reactive diluent, 1-3 parts of photoinitiator and 0.1-0.4 part of antioxidant, wherein the Tg point of the urethane acrylate is lower than-35 ℃, and the elongation is more than or equal to 150%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111648168.XA CN114316881A (en) | 2021-12-29 | 2021-12-29 | High-adhesion polyurethane acrylic acid optical transparent adhesive |
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| CN202111648168.XA CN114316881A (en) | 2021-12-29 | 2021-12-29 | High-adhesion polyurethane acrylic acid optical transparent adhesive |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103725245A (en) * | 2013-12-20 | 2014-04-16 | 广州慧谷工程材料有限公司 | Solvent-free UV (ultraviolet) curing glue for optical transparent adhesive tape and preparation method and application thereof |
| CN106398554A (en) * | 2016-05-12 | 2017-02-15 | 张家港康得新光电材料有限公司 | Ultraviolet-cured pressure-sensitive adhesive and preparation method therefor |
| US20170174956A1 (en) * | 2015-12-21 | 2017-06-22 | Evonik Degussa Gmbh | Acrylate-Terminated Urethane Polybutadienes From Low-Monomer 1:1 Monoadducts From Reactive Olefinic Compounds and Diisocyanates and Hydroxy-Terminated Polybutadienes for Liquid Optically Clear Adhesives (LOCAs) |
| CN106883796A (en) * | 2017-04-26 | 2017-06-23 | 中山市鼎立森电子材料有限公司 | A kind of mobile phone glass screen protecting film OCA optical cements |
| CN107163903A (en) * | 2017-07-07 | 2017-09-15 | 东莞市德聚胶接技术有限公司 | Optical adhesive and preparation method thereof |
| CN108977160A (en) * | 2018-06-25 | 2018-12-11 | 江苏科琪高分子材料研究院有限公司 | Ultraviolet light semi-solid preparation OCA optical cement and application thereof |
-
2021
- 2021-12-29 CN CN202111648168.XA patent/CN114316881A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103725245A (en) * | 2013-12-20 | 2014-04-16 | 广州慧谷工程材料有限公司 | Solvent-free UV (ultraviolet) curing glue for optical transparent adhesive tape and preparation method and application thereof |
| US20170174956A1 (en) * | 2015-12-21 | 2017-06-22 | Evonik Degussa Gmbh | Acrylate-Terminated Urethane Polybutadienes From Low-Monomer 1:1 Monoadducts From Reactive Olefinic Compounds and Diisocyanates and Hydroxy-Terminated Polybutadienes for Liquid Optically Clear Adhesives (LOCAs) |
| CN106398554A (en) * | 2016-05-12 | 2017-02-15 | 张家港康得新光电材料有限公司 | Ultraviolet-cured pressure-sensitive adhesive and preparation method therefor |
| CN106883796A (en) * | 2017-04-26 | 2017-06-23 | 中山市鼎立森电子材料有限公司 | A kind of mobile phone glass screen protecting film OCA optical cements |
| CN107163903A (en) * | 2017-07-07 | 2017-09-15 | 东莞市德聚胶接技术有限公司 | Optical adhesive and preparation method thereof |
| CN108977160A (en) * | 2018-06-25 | 2018-12-11 | 江苏科琪高分子材料研究院有限公司 | Ultraviolet light semi-solid preparation OCA optical cement and application thereof |
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Application publication date: 20220412 |