Resin Glass Coating Agent Scratch Resistance
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Solution Overview
Problem
Resin glass lacks sufficient scratch resistance compared to inorganic glass, and existing methods for improving scratch resistance, such as forming a hard film on its surface, are cumbersome and costly.
Innovation Solution
A coating agent for resin glass comprising a film-forming component with urethane (meth)acrylate, tri(meth)acrylate, colloidal silica, and a photoradical polymerization initiator, which forms a three-dimensionally crosslinked network structure upon curing, enhancing scratch resistance and adhesion when applied and irradiated with light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a two-layer hard film (primer layer and hard coat layer) is formed on resin glass to improve scratch resistance, then scratch resistance is improved, but the number of manufacturing steps increases and production cost increases
Solution Approach 1:
The patent combines the primer layer and hard coat layer into a single integrated coating layer. This coating layer contains both adhesion promoters (for bonding to the resin glass substrate) and hardening agents (for providing scratch resistance), eliminating the need for separate primer and hard coat application steps while achieving both adhesion and durability requirements
Solution Approach 2:
The single coating layer is designed to perform multiple functions simultaneously: it provides adhesion to the resin glass substrate through adhesion promoters, delivers scratch resistance through hardening agents, and ensures proper curing through photopolymerization. This multi-functional coating replaces the need for specialized primer and hard coat layers
2Strength
If a two-layer hard film (primer layer and hard coat layer) is formed on resin glass to improve scratch resistance, then scratch resistance is improved, but production cost increases
Solution Approach 1:
The patent combines the primer layer and hard coat layer into a single integrated coating layer. This coating layer contains both adhesion promoters (for bonding to the resin glass substrate) and hardening agents (for providing scratch resistance), eliminating the need for separate primer and hard coat application steps while achieving both adhesion and durability requirements
Solution Approach 2:
The coating composition is designed to self-assemble and self-cure in a single application step. The adhesion promoters automatically bond to the substrate while the photopolymerization initiator cures the hardening agents, eliminating the need for separate processing steps and reducing labor and equipment costs
3Weight of moving object
If resin glass is used instead of inorganic glass for weight reduction, then vehicle weight decreases, but scratch resistance deteriorates
Solution Approach 1:
The patent creates a composite coating system combining organic adhesion promoters and inorganic hardening agents (such as silica or zirconia particles) within a photopolymerizable matrix. This composite structure provides the lightweight advantage of organic resins while incorporating the hardness and scratch resistance of inorganic particles, achieving both weight reduction and improved durability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The coating agent provides a simple method to form a scratch-resistant film on resin glass, improving its durability and adhesion while maintaining weatherability, thus addressing the cost and complexity issues of existing methods.
Implementation Method 1
a component D consisting of a photoradical polymerization initiator, wherein a content of the component D is 0.1 parts by mass or more and 10 parts by mass or less based on 100 parts by mass of the total film-forming component
Data Source
AI summary
A coating agent includes a film-forming component including a component A consisting of a urethane (meth)acrylate having an isocyanuric ring skeleton, a component B consisting of a tri(meth)acrylate having an isocyanuric ring skeleton and having no urethane bond, and a component C consisting of colloidal silica having a (meth)acryloyl group and a hydrocarbon group having 3 to 13 carbon atoms; and a component D consisting of a photoradical polymerization initiator. The content of the component D is 0.1 parts by mass or more and 10 parts by mass or less based on 100 parts by mass of a total of the film-forming component.