Curable compositions, cured products, and articles

The curable composition addresses the issue of adhesive strength loss in metal bonding by using a polymerizable monomer, radical initiator, azole compound, and reducing agent to create a moisture-resistant, corrosion-resistant adhesive film with improved adhesion and durability.

JP7874178B2Active Publication Date: 2026-06-15DENKA CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
DENKA CO LTD
Filing Date
2023-08-17
Publication Date
2026-06-15

AI Technical Summary

⚠Technical Problem

Curable compositions used as adhesives for bonding metal materials, such as galvanized chromate steel sheets, face a significant challenge in maintaining adhesive strength over a long period due to moisture penetration, leading to a decrease in bonding effectiveness.

⚗Method used

A curable composition comprising a polymerizable monomer with a carbon-carbon double bond, a radical polymerization initiator, an azole compound, an elastomer, and a reducing agent, which is cured between PET films to achieve a water absorption rate of 1.5 to 3.6% and includes an azole compound to enhance adhesion and suppress corrosion, resulting in a cured film with a water contact angle of 80 to 90° and elongation at break ratio of 0.7 to 1.5.

🎯Benefits of technology

The composition effectively suppresses the decrease in adhesive strength over time by minimizing moisture penetration and enhancing adhesion to metal surfaces, maintaining strong bonding properties even after immersion in water.

✦ Generated by Eureka AI based on patent content.

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Abstract

This curable composition comprises a polymerizable monomer having a carbon-carbon double bond, a radical polymerization initiator, an azole compound, an elastomer, and a reducing agent. When the curable composition is sandwiched between two sheets of PET films and cured at 23°C for 24 hours to obtain a test cured film with a size of 50 mm × 10 mm × 1 mmt and the resultant is immersed in pure water at 23°C for one week, the water absorption rate of same is 1.5%-3.6%.
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