Curable Masking Composition for Shape Retention and Easy Peeling
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Solution Overview
Problem
Conventional solvent-type masking materials have poor form retention, limiting the freedom of coating shape and handling properties, and require a drying furnace for improved peeling performance, making automation with robots difficult and economically inefficient.
Innovation Solution
A curable composition comprising a prepolymer and a non-polymer, along with optional acrylic monomer, solid particles, and a polymerization initiator, which provides excellent shape retention, ease of application, and efficient peeling properties, enabling automation and reducing substrate contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a solvent-type masking material is used, then the material can be applied easily, but the form retention is poor and handling properties deteriorate
Solution Approach 1:
The patent changes the chemical composition parameters by using a solvent-free curable composition with specific resin components (acrylic resin, polyurethane resin, polyester resin) in controlled ratios, transforming the material from solvent-based to a curable system that achieves both ease of application and form retention through controlled curing
Solution Approach 2:
The patent creates a composite masking material by combining multiple resin components (acrylic resin, polyurethane resin, polyester resin) with specific molecular weight ranges and functional groups, forming a composite system that provides both workability during application and structural integrity after curing
2Reliability
If a drying furnace is installed to improve peeling performance, then the peeling performance improves, but the economic efficiency deteriorates
Solution Approach 1:
The patent replaces the thermal processing system (drying furnace) with a chemical curing system where the masking material cures at ambient or moderate temperatures through chemical reactions of the resin components, eliminating the need for expensive thermal equipment while maintaining peeling performance
Solution Approach 2:
The masking material performs self-curing through its own chemical composition (curable resin system) without requiring external thermal energy input, making the process self-sufficient and eliminating dependence on external drying furnaces
3Productivity
If automation with robots is implemented, then the productivity improves, but the handling properties must be excellent
Solution Approach 1:
The patent adjusts the viscosity and flow parameters of the curable composition by selecting specific resin components with appropriate molecular weights and functional groups, enabling the material to be easily dispensed by robotic systems while maintaining shape fidelity during and after application
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 curable composition allows for precise coating shape formation, easy film application, and smooth peeling, enhancing automation capabilities and economic efficiency while minimizing substrate impact.
Implementation Method 1
a polymerization initiator (C)
Data Source
AI summary
An object of the present invention is to provide a masking material having excellent peeling properties even if the drying step is reduced, preferably without the drying step. There is provided a curable composition comprising: (A1) a prepolymer represented by (Formula 1): (CH2═C(R1)—CO—O—R2—O—CO—NH—R3—NH—CO)n—R4 wherein each of R1 is independently a hydrogen atom or a methyl group, each of R2 is independently an aliphatic group having 1 to 8 carbon atoms, each of R3 is independently an aromatic or aliphatic group having 1 to 30 carbon atoms and R4 is an aromatic or aliphatic group having a number average molecular weight at least 500 and having a polycarbonate backbone and/or a polyester backbone and n is an integer from 2 to 4 and (A2) a non-polymer represented by (Formula 2): (CH2═C(R5)—CO—O—R6—O—CO—NH)m—R7 wherein each of R5 is independently a hydrogen atom or a methyl group, each of R6 is independently an aliphatic group having 1 to 8 carbon atoms, R7 is independently an aromatic or aliphatic group having 1 to 30 carbon atoms and m is an integer from 2 to 4.