Linear Polyol Resin Composition for Bubble-Free Reattachable Coating
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Solution Overview
Problem
Existing coating layers for flat panel displays often form bubbles when reattached after peeling, leading to aesthetic and visibility issues, and can contaminate the substrate, affecting its physical properties.
Innovation Solution
A resin composition comprising first and second polyols with a linear structure without side chains, combined with polyisocyanate, curing agent, and antistatic agent, is used to form a coating layer with excellent bubble-free properties and improved adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a coating layer is formed on a substrate and then peeled off and reattached, then the coating layer can be reused or repositioned, but bubbles are inserted or formed between the substrate and the coating layer, deteriorating aesthetic impression and visibility
Solution Approach 1:
The patent changes the chemical composition parameters of the coating layer by using a resin composition containing specific polyols (polyether polyol and polyester polyol) with controlled molecular weights and ratios. This compositional parameter change enables the coating layer to maintain adhesion quality after repeated peeling and reattachment without forming bubbles, thus resolving the contradiction between reattachment capability and bubble-free property.
Solution Approach 2:
The patent employs a composite resin composition combining multiple components: polyether polyol, polyester polyol, polyisocyanate, and curing agents. This composite material approach creates a coating layer with enhanced adhesion and bubble-free properties that can be repeatedly attached and detached without degrading performance, addressing both adaptability and manufacturing precision requirements.
2Reliability
If a coating layer is formed on a substrate, then the substrate is protected or enhanced, but the coating layer may contaminate the substrate, affecting its physical properties
Solution Approach 1:
The patent modifies the chemical parameters of the coating layer by selecting specific polyols with appropriate molecular weights and ratios, which enables the coating to provide effective protection while minimizing substrate contamination. The controlled composition ensures that the coating adheres strongly during use but can be cleanly removed without leaving residues that would contaminate the substrate.
Solution Approach 2:
The patent designs the coating layer composition to enable complete extraction or removal of the coating from the substrate without leaving contaminants. By using specific resin components that do not form strong chemical bonds with the substrate, the coating can be fully removed during peeling, preventing substrate contamination while maintaining protection during the coating's service life.
3Manufacturing precision
If a coating layer is designed for strong adhesion to prevent bubbling, then bubble-free property is improved, but the coating layer may be difficult to peel off or reattach
Solution Approach 1:
The patent optimizes the compositional parameters of the resin, specifically the ratio and molecular weights of polyether polyol and polyester polyol, to achieve a balance between adhesion strength and peeling ease. This parameter optimization allows the coating to maintain strong adhesion preventing bubbles during use, while still enabling easy peeling and reattachment when needed.
Solution Approach 2:
The patent creates different functional characteristics in the coating layer through its composite composition: the polyisocyanate and curing agents provide strong adhesion to prevent bubbling, while the specific polyol combination maintains sufficient flexibility and surface properties for easy peeling and reattachment. This local quality differentiation within the coating composition resolves the contradiction between adhesion strength and ease of reattachment.
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 resin composition ensures a bubble-free coating layer that maintains adhesion even after repeated peeling and reattachment, without contaminating the substrate, thus enhancing the display's aesthetic and functional properties.
Implementation Method 1
a first polyol having a linear structure without a side chain and represented by Chemical Formula (1), a second polyol having a linear structure without a side chain and represented by Chemical Formula (2), and polyisocyanate
Implementation Method 2
the coating layer has an adhesion force to a substrate
Data Source
AI summary
A resin composition according to an exemplary embodiment of the present disclosure includes a first polyol represented by Chemical Formula 1, a second polyol represented by Chemical Formula 2, and a polyisocyanate, wherein the first polyol and the second polyol have a linear structure without a side chain.each of Y1 to Y4 is H or OH—, at least one of Y1 and Y2 is OH—, at least one of Y3 and Y4 is OH—, each of X1 to X3 is independently a C1-C20 alkyl group, the alkyl group includes or does not include an unsaturated bond, —CH2— in the alkyl group may be substituted or unsubstituted with —CHOH—, and each of n and m is independently 1 to 200.