Photoaligning Polymer Composition With Simpler High-Yield Synthesis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing synthesis processes for aryl acrylic acid ester photoaligning polymer materials are costly, use toxic materials, require tedious steps, and yield moderate results with difficult isolation of the final product.
Innovation Solution
A novel synthesis process for aryl acrylic acid ester photoaligning polymers involving reacting compounds of specific formulas in the presence of a base and catalyst, followed by polymerization with peroxide and optional stopping with heating or radical inhibitors, resulting in a homopolymer without further purification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional synthesis processes are used for aryl acrylic acid ester photoaligning polymer materials, then the materials can be produced, but the process requires expensive educts, toxic materials, and tedious steps with moderate yield and difficult isolation
Solution Approach 1:
The patent changes the chemical parameters of the synthesis process by using different reagents and reaction conditions. Specifically, it employs compounds of formulas (II) and (III) with specific structural features, uses bases such as potassium carbonate or cesium carbonate, and implements a two-stage reaction process that improves both yield and ease of isolation compared to conventional methods
Solution Approach 2:
The patent introduces an intermediary compound structure that facilitates the synthesis. The compound of formula (III) acts as a key intermediary that reacts with compound (II) to form compound (I), which then polymerizes to give the final photoaligning polymer material. This intermediary approach simplifies the overall process and improves yield
2Ease of manufacture
If conventional synthesis processes are used, then the materials can be produced, but toxic materials and additives must be used
Solution Approach 1:
The patent eliminates harmful factors by replacing toxic reagents and additives with safer alternatives. The conventional process uses toxic materials that the patent replaces with non-toxic bases (potassium carbonate, cesium carbonate), non-toxic catalysts (phenothiazine), and non-toxic solvents (DMF, acetonitrile), thereby converting a harmful process into a safe one while maintaining effectiveness
Solution Approach 2:
The patent uses readily available, non-toxic, and inexpensive reagents that can be easily handled and disposed of safely. The bases, catalysts, and solvents mentioned are standard laboratory chemicals that are non-toxic or low-toxicity, eliminating the need for special handling procedures required for toxic materials
3Productivity
If conventional synthesis processes are used, then the materials can be produced, but the process is tedious and the final product is very difficult to isolate
Solution Approach 1:
The patent performs preliminary actions by designing the synthesis route to produce the final polymerizable compound (I) in a purified form ready for direct polymerization. The two-stage reaction process with careful selection of reagents and conditions ensures that compound (I) is obtained in high purity and yield, eliminating the need for complex isolation and purification steps that would otherwise be required
Solution Approach 2:
The patent effectively extracts or removes the need for difficult isolation steps by designing a synthesis pathway where the final compound (I) precipitates or can be easily separated from the reaction mixture. The use of specific solvents and reaction conditions allows the product to be obtained in a form that is ready for direct polymerization without further purification
4Productivity
If conventional synthesis processes are used, then the materials can be produced, but very expensive educts are required
Solution Approach 1:
The patent replaces expensive educts with cheaper, readily available chemical compounds. The compounds of formulas (II) and (III) used in the invention are described as having structures that can be synthesized from common precursors, and the reagents (bases, catalysts, solvents) are standard, inexpensive laboratory chemicals, thereby significantly reducing the cost of production while maintaining the ability to produce the photoaligning polymer material
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 process reduces costs, eliminates the use of toxic materials, simplifies the synthesis, and produces a high-yield homopolymer suitable for optical and electro-optical elements without additional purification steps.
Implementation Method 1
reacting a compound of formula (II) with a compound of formula (III) and optionally with a compound of formula (IV) or (IV')
Implementation Method 2
polymerizing the compound obtained under step a. or b. with an organic or inorganic peroxide
Implementation Method 3
stopping the reaction by heating or with a radical inhibitor or a radical scavenger
Data Source
AI summary
The present invention relates to a novel method for the preparation of photoaligning polymer materials comprising aryl acrylic acid ester groups, to photoalignment compositions obtained by this process, to the use of the composition as orienting layer for liquid crystals and to non-structured and structured optical elements, electro-optical elements, multi-layer systems or in nanoelectronics comprising the compositions.