Active-Energy-Ray-Curable Coating Composition for Resin
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Solution Overview
Problem
Existing active-energy-ray-curable coating compositions for resin materials, such as polycarbonate, lack resistance to acid rain and liquid battery electrolytes, and do not adequately address chemical, weathering, and wear resistance simultaneously.
Innovation Solution
An active-energy-ray-curable coating composition comprising a compound with an isocyanurate linkage as component (A), a compound with an isocyanurate or allophanate linkage and additional urethane linkages as component (B), and a compound with 6 or more (meth)acryloyl groups per molecule as component (C), formulated to provide enhanced chemical, weathering, and wear resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional active-energy-ray-curable coating compositions are used, then weathering resistance and wear resistance can be achieved, but chemical resistance to acid rain and battery electrolyte is insufficient
Solution Approach 1:
The patent employs a composite coating formulation combining multiple (meth)acrylate compounds with different functional groups (isocyanurate linkage in component A, isocyanurate or allophanate linkage with urethane linkages in component B, and compound with 6 or more (meth)acryloyl groups in component C). This composite approach creates a cured film that simultaneously achieves excellent chemical resistance, weathering resistance, and wear resistance, resolving the contradiction between chemical resistance and adaptability to multiple environmental factors.
2Object-affected harmful factors
If resin materials are coated with protective films, then surface properties are improved, but the coating must simultaneously withstand chemical, weathering, and wear conditions
Solution Approach 1:
The patent develops a multi-functional coating composition where the specific combination of component A (isocyanurate linkage), component B (isocyanurate or allophanate linkage with urethane linkages), and component C (compound with 6 or more (meth)acryloyl groups) provides simultaneous protection against chemical erosion, weathering degradation, and mechanical wear. This universal protective film eliminates the need for multiple specialized coatings, reducing overall system complexity while maintaining comprehensive protection.
3Reliability
If existing coating compositions are formulated for wear and weathering resistance, then those properties are achieved, but adhesion in harsh chemical environments is insufficient
Solution Approach 1:
The patent optimizes the molecular structure parameters of the coating components, specifically incorporating isocyanurate linkages (component A), isocyanurate or allophanate linkages with urethane linkages (component B), and compounds with 6 or more (meth)acryloyl groups (component C). These structural parameter changes enhance the cured film's adhesion strength while maintaining versatility across chemical, weathering, and wear conditions, resolving the contradiction between adhesion reliability and performance adaptability.
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 composition forms a cured film with excellent chemical resistance, high weathering resistance, and wear resistance, demonstrating strong adhesion to resin materials even in harsh environments.
Implementation Method 1
active-energy-ray-curable coating composition
Data Source
AI summary
An object of the invention is to provide an active-energy-ray-curable coating composition, which is advantageous in that a cured film having excellent weathering resistance, wear resistance, and chemical resistance can be formed from the composition, and a molded article having having the cured film. The invention is directed to an active-energy-ray-curable coating composition containing a compound of the formula (1) as a component (A), a compound of the formula (2) as a component (B), and a compound having 6 or more (meth)acryloyl groups per molecule as a component (C) (wherein, in the formulae, R1, R2, and R3 are an oxyalkylene group or the like; X1, X2, and X3 are CH2=CR4-CO-, CH2=CR4-CO(O(CH2)5-CO)a1-, H, or an alkyl group, wherein R4 is H or a methyl group, and a1 is an integer of 1 or more; R21 to R25 are a group having a polymerizable group; Z21 to Z23 are a group of the formula (2z); L21 and L22 are a divalent linking group; n1 and n2 are 0 or 1; X21 is an alkylene group; * is a bonding site; Z1 is O or N; and Z2 is H or -C(=O)-).