Organic silicon adhesive, organic silicon OCA and preparation method and application of organic silicon OCA

Abstract

The invention provides an organic silicon adhesive, organic silicon OCA as well as a preparation method and application of the organic silicon OCA. The organic silicon adhesive is prepared from the following raw materials in parts by weight: 20 to 80 parts of vinyl silicone oil, 1 to 20 parts of vinyl silicone resin, 15 to 60 parts of hydrogen-containing silicone oil, 0.1 to 10 parts of hydrogen-containing silicone resin and 0.1 to 20 parts of macromolecular modified silane coupling agent. Compared with a micromolecular silane coupling agent, the macromolecular modified silane coupling agent is added, so that higher bonding strength among molecules is achieved, and the overall modulus of the OCA colloid is improved; and an alkoxy functional group is introduced into macromolecules, so that the colloid can keep good adhesive strength, waste caused by factors such as low modulus of the OCA colloid, adhesive film damage, deformation and wrinkles in the production / die cutting and use process is effectively reduced, and the problem that the adhesive strength of common OCA is reduced due to modulus rise can be solved.

Description

technical field [0001] The invention belongs to the field of adhesives, and in particular relates to a silicone adhesive, silicone OCA, a preparation method and application thereof. Background technique [0002] The optical adhesive of OCA optical tape is a special adhesive used for bonding transparent optical components. It is characterized by colorless, transparent, light transmittance above 90 parts, good bonding strength, and can be cured at room temperature or medium temperature. And it has the characteristics of small curing shrinkage, etc. It is mainly used for the bonding of ITO film, electronic paper, transparent devices, projection screen assembly, display assembly, lens assembly, resistive touch screen, capacitive touch screen, panel and other related electronic optical devices. With the continuous expansion of application scenarios, the requirements for weather resistance of laminated materials are also getting higher and higher; as the number of applications inc...

AI Technical Summary

Problems solved by technology

The liquid glue bonding process adopted at this stage, including the dispensing process, coating process, printing process, and squeegeeing process, requires a lot of manpower and equipment costs, and the production efficiency is relatively low, which cannot meet the growing demands of the future. market demand

[0003] CN104004460A discloses a silicone gel optical adhesive film and its production process. This type uses a two-component thermosetting silicone adhesive. When making an OCA film, due to the need to mix the two components, the investment in equipment is relatively large , and thermosetting glue has a certain service life limit, it cannot be put into large-scale production, and it is easy to cause the glue and gel to be scrapped, which greatly affects the production efficiency

[0004] CN111154430A discloses a UV-curable OCA pressure-sensitive adhesive film and a preparation method thereof. This type is made of an acrylic adhesive, and the acrylic adhesive is relatively weaker than the Si-O bond energy of organic silicon due to the C-C bond energy. Low, easy to degrade and break during use in many scenes, yellowing after aging

Unable to meet the current diversified applications

[0005] The current liquid glue bonding process requires a lot of manpower and equipment costs, relatively low production efficiency, and poor weather resistance

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