Epilamization Agent with Branched Polymer for Watchmaking Surfaces
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Solution Overview
Problem
Existing surface modification agents for epilamization, such as those used in watchmaking, suffer from inferior resistance to cleaning, limited density and thickness, negative aesthetic effects, and restricted applicability to specific surface materials, leading to suboptimal performance and versatility.
Innovation Solution
A surface modification agent with anchor groups and branched polymer structures that can be uniformly and densely bonded to various surfaces, providing high scratch and cleaning resistance, aesthetic improvements, and tunable properties through selective polymerization and cross-linking, allowing application on a range of materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If known epilames are used for surface modification, then the surface energy is reduced, but the resistance towards cleaning becomes inferior
Solution Approach 1:
The molecule is segmented into distinct functional regions: a polar head group for anchoring to the surface, a hydrocarbon chain providing mechanical resistance, and a fluorinated terminal group for low surface energy. This segmentation allows each part to contribute optimally to different properties, resolving the contradiction between cleaning resistance and molecule density.
Solution Approach 2:
The epilame molecule is a composite structure combining different chemical moieties (polar groups, hydrocarbon chains, fluorinated groups) in a single molecule. This composite approach enables simultaneous achievement of high anchoring density, mechanical durability, and cleaning resistance that cannot be obtained with single-function substances.
2Reliability
If known epilames are used for surface modification, then the surface energy is reduced, but the coating thickness is insufficient
Solution Approach 1:
The invention transitions from two-dimensional surface coverage to three-dimensional volume utilization by incorporating bulky hydrocarbon chains and fluorinated groups that extend perpendicular to the surface. This vertical dimensionality increase provides both sufficient coating thickness and maintains effective surface energy reduction.
3Reliability
If known epilames are used for surface modification, then the surface energy is reduced, but aesthetic properties deteriorate due to interference phenomena and spots
Solution Approach 1:
The invention optimizes molecular parameters including chain length, fluorinated group configuration, and head group polarity to achieve uniform molecular packing and orientation. This parameter optimization eliminates interference phenomena and spot formation while preserving the low surface energy effect, thereby maintaining aesthetic properties.
4Adaptability or versatility
If known epilames are used for surface modification, then the application is restricted to specific surface materials, but versatility across different materials is needed
Solution Approach 1:
The epilame molecule is designed with a universal polar head group capable of interacting with multiple surface materials (metals, ceramics, polymers) through various bonding mechanisms. This universal anchoring capability, combined with standardized hydrocarbon and fluorinated segments, provides broad material applicability without requiring complex material-specific molecular designs.
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 agent achieves improved uniformity, density, and thickness of the coating layer, enhancing mechanical and cleaning resistance while maintaining excellent aesthetic properties, and can be tailored for specific surface materials, enabling broader applicability.
Implementation Method 1
at least one of the anchor groups of the molecules of the agent is bonded to the surface of the substrate
Implementation Method 2
due to an improved packing of the molecules of the agent according to the present invention on the surface of the article and to an increased density of carbon atoms
Data Source
AI summary
The present invention relates to an agent in particular for the surface epilamization of an article comprising one or more molecules having the general formula (1): A-F wherein: - A is an anchor group comprising a moiety selected from the group consisting of silane groups, hydroxyl groups, catechol groups, phosphate groups, phosphonate groups, carboxylic acid groups, amine groups, thiol groups and any combination of two or more of the aforementioned groups and - F is a functionalizing group, wherein the functionalizing group comprises a branched polymer having a backbone and at least two side groups, wherein at least one of the side groups is a C1-20 hydrocarbon group or a perhalogenated C1-20 hydrocarbon group. The invention pertains to the technical field of epilame for timepiece mechanical parts.