Stain Resistant Soft Touch Coating Composition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Soft touch coatings for consumer electronic devices often exhibit poor stain resistance, limiting their application to dark substrates, and improving stain resistance typically compromises soft touch properties.
Innovation Solution
A coating composition comprising a fluoropolymer with reactive functional groups, a polyester polyol with a hydroxyl value greater than 200 mg KOH/g, and a crosslinker, which together form a film that provides both good stain resistance and soft touch properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If soft touch coating formulations are used to achieve soft touch properties, then the coating provides a soft feel, but the stain resistance deteriorates
Solution Approach 1:
The coating composition uses a composite system combining fluoropolymer (providing soft touch and stain resistance), polyester polyol (providing flexibility and adhesion), and crosslinker (providing network structure). This composite approach allows the coating to simultaneously achieve soft touch properties and good stain resistance, resolving the contradiction between these two properties.
Solution Approach 2:
The patent optimizes specific parameters including hydroxyl value of polyester polyol (greater than 200 mg KOH/g), molecular weight ranges, and crosslinker ratios to achieve the desired balance between soft touch and stain resistance. By carefully controlling these parameters, the coating achieves both properties without compromise.
2Reliability
If stain resistance is improved in soft touch coatings, then the coating resists stains better, but the soft touch properties deteriorate
Solution Approach 1:
The synergistic combination of fluoropolymer, polyester polyol, and crosslinker creates a coating that simultaneously provides stain resistance and soft touch properties. The fluoropolymer component contributes to both stain resistance and soft feel, while the crosslinker maintains flexibility, resolving the contradiction between these properties.
Solution Approach 2:
The patent specifies precise parameter ranges including polyester polyol hydroxyl value (greater than 200 mg KOH/g), molecular weights, and crosslinker ratios to optimize the balance between stain resistance and soft touch properties, ensuring both properties are achieved without compromise.
3Ease of operation
If conventional soft touch coatings are applied, then the coating provides soft touch feel, but the application is restricted to dark substrates
Solution Approach 1:
The fluoropolymer-based composite coating system provides inherent stain resistance that allows the coating to be applied on both light and dark substrates. The composite structure maintains soft touch properties while the fluoropolymer component provides the necessary stain resistance for light-colored substrates, expanding application versatility.
Solution Approach 2:
The coating composition is designed to be universally applicable to various substrate colors (both light and dark) while maintaining soft touch properties. The multi-functional formulation provides simultaneous stain resistance, soft touch feel, and broad substrate compatibility, making it suitable for diverse consumer electronic devices.
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 coating composition achieves effective stain resistance and soft touch properties, allowing its application on both dark and light-colored substrates without compromising performance.
Implementation Method 1
a fluoropolymer comprising at least one reactive functional group; a polyester polyol; and a crosslinker reactive with (a) and (b)
Data Source
AI summary
A stain resistant, soft touch coating composition can include: (a) a fluoropolymer comprising at least one reactive functional group; (b) a polyester polyol; and (c) a crosslinker reactive with (a) and (b). The polyester polyol can include a reaction product obtained from a mixture of reactants including: an aliphatic diol; a polyol having 3 or more hydroxyl groups; and a cyclic polycarboxylic acid, or an anhydride or ester thereof.