Triazine UV Absorber Synthesis via Parameter Changes
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Solution Overview
Problem
Existing processes for preparing triazine-based UV absorbers often result in the formation of impurities that are difficult to separate, leading to the production of undesired by-products.
Innovation Solution
A process involving the reaction of 4,6-dichloro-1,3,5-triazin-2-amine with aromatic compounds in the presence of an acid to form 4,6-diaryl-1,3,5-triazin-2-amine, which can be converted into the desired UV absorber compounds with minimal impurity formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional processes are used to prepare triazine-based UV absorbers, then the synthesis can be completed, but impurities are formed that are difficult to separate
Solution Approach 1:
The patent changes the chemical parameters of the reaction by using 4,6-dichloro-1,3,5-triazin-2-amine as the starting material instead of conventional triazine derivatives. This parameter change in the reactant structure leads to different reaction pathways that minimize impurity formation while maintaining synthesis efficiency.
Solution Approach 2:
The invention extracts or removes the problematic impurity formation issue by using a modified synthetic route that starts with 4,6-dichloro-1,3,5-triazin-2-amine. This approach effectively takes out the source of difficult-to-separate impurities that plague conventional methods, allowing for cleaner product formation.
2Productivity
If conventional synthesis routes are used, then UV absorber compounds can be produced, but undesired by-products are formed
Solution Approach 1:
The patent applies parameter changes by modifying the starting material from conventional triazine compounds to 4,6-dichloro-1,3,5-triazin-2-amine. This fundamental parameter change in the reactant identity alters the reaction chemistry to favor desired product formation while suppressing by-product generation.
Solution Approach 2:
The synthesis method uses 4,6-dichloro-1,3,5-triazin-2-amine as an intermediary compound that facilitates the formation of UV absorbers through controlled reaction steps. This intermediary approach allows for better control over the reaction pathway, reducing unwanted by-products while maintaining productivity.
3Ease of manufacture
If impurities are formed during synthesis, then the process can proceed, but separation becomes difficult and costly
Solution Approach 1:
The invention extracts the problem of impurity formation at its source by using 4,6-dichloro-1,3,5-triazin-2-amine as the starting material. This approach removes the need for complex separation procedures that would otherwise be required to deal with difficult-to-separate impurities from conventional methods.
Solution Approach 2:
The patent converts the potential harm of impurity formation into a benefit by designing a synthesis route that inherently minimizes impurities. This approach transforms what would normally be a problematic separation challenge into an advantage of simplified purification, reducing both device complexity and manufacturing cost.
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
This process efficiently produces UV absorber compounds with reduced impurity formation, making it a cost-effective and commercially viable method for preparing triazine-based UV absorbers.
Implementation Method 1
reacting the 4,6-dichloro-1,3,5-triazin-2-amine with at least one aromatic compound in the presence of at least one acid to form 4,6-diaryl-1,3,5-triazin-2-amine
Data Source
AI summary
The presently claimed invention relates to a novel, highly efficient and general process for the preparation of UV absorbers.