High-blackness, low-reflectivity and thermocuring dust-catching adhesive composition and preparation method thereof

By combining polyurethane acrylate resin, diluent, multifunctional polymer, black pigment and matting powder in a specific ratio, the problems of incomplete curing and inaccurate reflectivity control of UV adhesives under high blackness were solved, and an adhesive with high blackness and low reflectivity was achieved, which meets the performance requirements of camera modules.

CN121379495APending Publication Date: 2026-01-23SHANGHAI YUNTONG ELECTRONIC TECH CO LTD +1
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Patent Information

Application Number
CN202511659546.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-13
Publication Date
2026-01-23

AI Technical Summary

Technical Problem

In existing technologies, UV dust-collecting adhesives are difficult to fully cure under high blackness conditions, and the light reflectance is not accurately controlled after adding matting powder, which affects the dust-collecting effect and overall performance of the adhesive.

Method used

By using a specific ratio of polyurethane acrylate resin, acrylate diluent, multifunctional polyurethane acrylate polymer, black pigment, first matting agent and second matting agent, the reflectivity is controlled in two stages to reduce the effect of oxygen inhibition and improve adhesion and dust collection performance.

Benefits of technology

A high-blackness, low-reflectivity adhesive composition was achieved, with the reflectivity precisely controlled between 1.5% and 1.8%. It exhibits strong adhesion, excellent dust-collecting performance, and meets the process requirements of camera modules.

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Abstract

The invention relates to a high-blackness and low-reflectivity thermocuring dust-catching adhesive composition and a preparation method thereof, and belongs to the technical field of adhesives. The adhesive composition is prepared from the following components in parts by weight: 30 to 60 parts of polyurethane acrylate resin, 1 to 10 parts of acrylate diluent, 1 to 5 parts of thermal initiator, 5 to 20 parts of polyfunctional polyurethane acrylate polymer, 5 to 15 parts of black color paste, 1 to 4 parts of first matting powder and 1 to 5 parts of second matting powder, through cooperation of specific parts of components, the adhesive composition has the properties of high blackness, low reflectivity, strong adhesive force, dust collection and the like; the first matting powder and the second matting powder are cooperatively matched, so that two-stage accurate regulation and control of'coarse adjustment and fine adjustment 'of the reflectivity can be realized; through the synergistic cooperation of the acrylate diluent and the polyfunctional urethane acrylate polymer, the influence of oxygen inhibition on an adhesive layer in the thermocuring process of the adhesive can be greatly reduced, and the adhesive force of the adhesive layer to a base material is enhanced.
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