Tie coat composition or anticorrosive coating composition and coating film
The tie-coat composition using phenoxy resin and amine-based curing agent addresses the adhesion issues in epoxy resin-based coatings, forming a film with enhanced interlayer adhesion and resistance to various forms of damage and corrosion.
WO2026141201A1 Publication Date: 2026-07-02CHUGOKU MARINE PAINTS
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Patent Information
- Application Number
- PCT/JP2025/044550
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-12-26
- Filing Date
- 2025-12-19
- Publication Date
- 2026-07-02
AI Technical Summary
Technical Problem
Conventional epoxy resin-based coating compositions for large steel structures suffer from poor weather resistance, leading to reduced interlayer adhesion between primer and topcoat films, especially when the application interval is long, and require improved adhesion between the substrate and topcoat.
Method used
A tie-coat composition comprising a phenoxy resin and an amine-based curing agent, with specific structural formulations to enhance interlayer adhesion, flexibility, and resistance to corrosion, whitening, and damage.
Benefits of technology
The composition forms a coating film with excellent interlayer adhesion, reduced stickiness, and balanced drying and curing properties, providing improved resistance to water, discoloration, corrosion, and damage.
✦ Generated by Eureka AI based on patent content.
Abstract
One embodiment of the present invention relates to a tie coat composition or an anticorrosive coating composition, or a coating film. The tie coat composition or the anticorrosive coating composition contains: a first agent containing a phenoxy resin (A) that is a resin containing a structure represented by formula (1) and a structure represented by formula (2); and a second agent containing an amine-based curing agent (B). R represents a hydrocarbon group having 10-18 carbon atoms, l represents an integer of 1-10, X represents a divalent linking group having 1-10 carbon atoms, R represents a hydrocarbon group having 10-18 carbon atoms, and m represents an integer of 1-10.
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