Curing-Type Coating Composition for Wear Resistance
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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 and components.
Innovation Solution
A curing-type coating composition combining a urethane adduct with a reaction product of colloidal silica and alkoxysilane containing a maleimide group, along with specific proportions of radical-polymerization initiators, ultraviolet absorbers, and organic solvents, to create a hard, transparent, and durable film.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thermal curing-type coating-agent composition is used to achieve wear resistance and weatherability, then the coating provides good protective properties, but the process requires large amounts of energy and longer heating times, reducing productivity
Solution Approach 1:
The patent replaces thermal curing with photo-curing technology. Instead of using thermal energy to initiate polymerization, the coating composition uses photo-polymerization initiators that activate upon exposure to ultraviolet light. This substitution of energy source (thermal → optical) enables faster curing times and lower energy consumption while maintaining the desired wear resistance and weatherability properties of the coating film.
2Device complexity
If a single-layer coating is applied to achieve both wear resistance and weatherability, then the coating structure is simplified, but achieving sufficient performance requires complex compositions and multiple components
Solution Approach 1:
The patent merges multiple functional components into a single coating composition that simultaneously provides wear resistance and weatherability. The composition combines photo-polymerization initiators, ultraviolet absorbers, hindered amine-based light stabilizers, and specific monomer mixtures (including colloidal silica fine particles with silane compounds, poly[(meth)acryloyloxyalkyl]isocyanurate, and urethane(poly)methacrylate with alicyclic framework) in predetermined proportions. This integrated formulation allows a single coating layer to achieve the protective properties that previously required multiple specialized layers.
3Productivity
If photo curing-type coating-agent composition is used to improve efficiency, then energy consumption is reduced and processing time is shortened, but achieving sufficient wear resistance and weatherability requires precise control of component proportions
Solution Approach 1:
The patent optimizes the concentration ratios and proportions of multiple components in the photo-curing coating composition. Specific parameters including the proportion of photo-polymerization initiators (0.1-10 parts by mass), ultraviolet absorbers (1-12 parts by mass), hindered amine-based light stabilizers (0.01-1.0 parts by mass), and the ratios of monomer components (such as colloidal silica fine particles with silane compounds, poly[(meth)acryloyloxyalkyl]isocyanurate, and urethane(poly)methacrylate) are precisely controlled. This parameter optimization enables the single-layer coating to achieve both fast curing and superior protective 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 without the need for undercoating agents, using a light curing process that is energy-efficient and produces films with enhanced adhesion and durability for outdoor use.
Implementation Method 1
a photo-polymerization initiator
Implementation Method 2
an ultraviolet absorber
Data Source
AI summary
A curing-type coating-agent composition according to the present invention contains: Component (A) including a urethane adduct compound exhibiting weatherability in an amount of from 99 to 65 parts by mass; Component (B) comprising a reaction product between a colloidal silica and an alkoxysilane compound having a maleimide group in an amount of from 1 to 35 parts by mass; a radical-polymerization initiator serving as Component (C) in an amount of from 0.1 to 10 parts by mass; an ultraviolet absorber serving as Component (D) in an amount of from 1 to 12 parts by mass; and an organic solvent serving as Component (E) in an amount of from 10 to 1,000 parts by mass; with respect to a sum of Component (A) and Component (B) being taken as 100 parts by mass.The composition according to the present invention demonstrates excellent wear resistance and weatherability as a coating agent for plastic substrate, or the like, which is employed outside.