Curing-Type Coating Composition for Wear Resistance and Weatherability
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Solution Overview
Problem
Existing curing-type coating compositions for resinous substrates face challenges in achieving simultaneous high wear resistance and weatherability, with thermal curing methods being energy-intensive and inefficient, and photo curing methods requiring multiple layers which increase processing steps and complexity.
Innovation Solution
A curing-type coating composition combining an isocyanuric-ring containing urethane (meth)acrylate, an isocyanuric-ring containing tri(meth)acrylate free from urethane bonds, a reaction product of colloidal silica and alkoxysilane with a maleimide group, and appropriate additives, which are applied in specific proportions to enhance wear resistance and weatherability without the need for an undercoating-agent composition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If thermal curing-type coating-agent composition is used to improve wear resistance, then wear resistance is improved, but energy consumption increases and processing time increases
Solution Approach 1:
The patent replaces thermal curing (heat-based) with photo-curing (light-based) mechanism. The coating composition uses photopolymerization initiators that cure the coating upon UV or visible light irradiation, eliminating the need for high-temperature thermal processing while achieving equivalent or superior wear resistance through optimized resin and silica particle combinations.
Solution Approach 2:
The patent changes the curing mechanism parameter from thermal to photo-based, and simultaneously optimizes the composition parameters including silica fine particle content (5-50 wt%), resin type (polyester, acrylic, or vinyl chloride-based), and crosslinking agents to achieve high wear resistance at room temperature or low temperature curing conditions.
2Strength
If thermal curing-type coating-agent composition is used to improve wear resistance, then wear resistance is improved, but processing time increases
Solution Approach 1:
The patent replaces thermal curing (heat-based) with photo-curing (light-based) mechanism. The coating composition uses photopolymerization initiators that cure the coating upon UV or visible light irradiation, eliminating the need for high-temperature thermal processing while achieving equivalent or superior wear resistance through optimized resin and silica particle combinations.
Solution Approach 2:
The patent changes the curing mechanism parameter from thermal to photo-based, and simultaneously optimizes the composition parameters including silica fine particle content (5-50 wt%), resin type (polyester, acrylic, or vinyl chloride-based), and crosslinking agents to achieve high wear resistance at room temperature or low temperature curing conditions.
3Use of energy by moving object
If photo curing-type coating-agent composition is used to reduce energy consumption, then energy consumption is reduced, but weatherability deteriorates
Solution Approach 1:
The patent employs composite material formulation combining multiple resin types (polyester resin, acrylic resin, or vinyl chloride-based resin) with colloidal silica fine particles (0.5-5 μm diameter) and specific crosslinking agents. This composite structure provides both photo-curability for low energy consumption and enhanced weatherability through the synergistic effects of the resin matrix and silica reinforcement.
Solution Approach 2:
The patent optimizes composition parameters including silica fine particle content (5-50 wt%), resin molecular weight and functional groups, crosslinking agent ratios, and UV absorber concentrations to simultaneously achieve rapid photo-curing and superior weatherability resistance against UV degradation and environmental exposure.
4Reliability
If multiple layers (undercoating + coating) are used to achieve both weatherability and wear resistance, then both properties are improved, but device complexity increases
Solution Approach 1:
The patent merges the functions of undercoating and topcoating into a single integrated coating layer. The coating composition simultaneously provides adhesion promotion (formerly undercoating function) and wear/weather resistance (formerly topcoating function) through a unified formulation containing resin, colloidal silica fine particles, crosslinking agents, and photopolymerization initiators in specific proportions.
Solution Approach 2:
The single coating layer is designed to perform multiple functions simultaneously: providing substrate adhesion, UV weatherability resistance, mechanical wear resistance, and photo-curable fast drying. This multi-functional coating eliminates the need for separate undercoating and topcoating steps, reducing processing complexity while maintaining or enhancing overall performance.
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 achieves excellent wear resistance and weatherability, allowing for efficient curing with lower energy consumption and reduced processing steps, while maintaining transparency and adhesiveness, even after prolonged exposure to accelerated tests.
Implementation Method 1
a photo-polymerization initiator in a specific proportion, respectively
Data Source
AI summary
A curing-type coating-agent composition according to the present invention contains: Component (A) (e.g., an isocyanuric ring-containing urethane (meth)acrylate compound) in an amount of from 20 to 80 parts by mass; Component (B) (e.g., an isocyanuric ring-containing tri(meth)acrylate compound free from any urethane bond) in an amount of from 10 to 70 parts by mass; Component (C-1) (e.g., a reaction compound between a colloidal silica and an alkoxysilane compound having a maleimide group) in amount of from 1 to 35 parts by mass, or Component (C-2) (e.g., a specific organosilicon compound) in an amount of from 5 to 35 parts by mass; a radical-polymerization initiator serving as Component (D) in an amount of from 0.1 to 10 parts by mass; an ultraviolet absorber serving as Component (E) in an amount of from 1 to 12 parts by mass; and an organic solvent serving as Component (F) in an amount of from 10 to 1,000 parts by mass; with respect to a sum of the Component (A), the Component (B), and the Component (C-1) or the Component (C-2) being taken as 100 parts by mass. The aforementioned composition demonstrates excellent wear resistance and weatherability as a coating agent for plastic substrate, or the like, which is employed outside.