Elastic embossing lacquer having high optical dispersion
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Solution Overview
Problem
Decorative articles with microstructure layers composed of crosslinked polymers have low elasticity, making them unsuitable for applications requiring high elasticity, such as textiles, despite achieving high optical dispersion.
Innovation Solution
An embossing lacquer with a high aromatic content and containing polymerizable compounds that form a polymer main chain and crosslinking aliphatic or polyether moieties to create an elastic polymer network, allowing for radical polymerization and high optical dispersion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If crosslinked polymers are used to achieve high optical dispersion, then optical properties are improved, but elasticity deteriorates
Solution Approach 1:
The patent uses composite materials by combining aromatic compounds (for optical dispersion) with aliphatic crosslinking agents (for elasticity) in a single polymer network. This creates a material that exhibits both high optical dispersion properties and high elasticity, resolving the contradiction between these two properties.
Solution Approach 2:
The patent applies local quality by creating distinct functional regions within the polymer structure: aromatic moieties are positioned to provide optical dispersion, while aliphatic crosslinking sections are positioned to provide elasticity. This spatial differentiation allows both properties to coexist in the same material.
2Illumination intensity
If aromatic content is increased to achieve high optical dispersion, then optical properties are improved, but polymer flexibility deteriorates
Solution Approach 1:
The patent combines aromatic compounds (providing optical dispersion) with flexible aliphatic crosslinking agents in a composite polymer system. The aliphatic components compensate for the rigidity introduced by aromatic groups, maintaining polymer flexibility while achieving high optical dispersion.
Solution Approach 2:
The patent changes the chemical composition parameters by incorporating specific ratios of aromatic to aliphatic components, and by selecting aliphatic crosslinking agents with appropriate molecular weights and chain lengths. This parameter optimization allows the polymer to achieve both high optical dispersion and maintained flexibility.
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 embossing lacquer achieves a balance of high optical dispersion and flexibility, enabling its use in applications like nanoimprint lithography and roll-to-roll processes, resulting in a microstructure layer with desired optical properties and elasticity.
Implementation Method 1
compound (A), which is a non-crosslinking compound in a radical polymerization reaction, 10 to 60 parts by weight of compound (B), which is a crosslinking compound in a radical polymerization reaction forming crosslinks
Data Source
Figure 1
Figure 2A~2C
AI summary
An embossing lacquer containing radical polymerizable compounds (A) to (D) that have an overall aromatic content of at least 20 wt%: compound (A), which is a non-crosslinking compound and has an aromatic content of at least 40 wt%; compound (B), which is a crosslinking compound forming crosslinks via one or more aliphatic chain(s) each having a molecular weight of 200 to 2000 g/mol, wherein the content of the aliphatic chain(s) in compound (B) is at least 40 wt%; optionally compound (C), which is a crosslinking compound and has an aromatic content of at least 30 wt%; and optionally compound (D), which has a urethane group. A decorative article containing the cured embossing lacquer and a method of preparing the decorative article.