Fluorinated Polyether Synthesis with Cyclic Backbone Moieties
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Solution Overview
Problem
Current methods fail to efficiently synthesize partially and fully fluorinated polyether polymers with cyclic structures in their main backbone, which are desirable for enhanced mechanical properties and lubricant performance under severe conditions.
Innovation Solution
A process involving the reaction of fluorinated compounds with acyl-fluoride groups and hydrogenated compounds containing fluoroformate groups in the presence of fluoride-containing compounds, allowing for the formation of polymers with regularly alternated recurring units comprising cyclic moieties, resulting in polymers with well-defined sequences and improved reactivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If photochemical oxidation of perfluoroolefins is used to synthesize PFPE polymers, then copolymers with randomly distributed recurring units are obtained, but the random distribution creates weak points in the polymer backbone that are more easily attacked by metals and/or Lewis acids
Solution Approach 1:
The patent applies local quality by introducing cyclic structures at specific positions in the polymer backbone rather than random distribution. The cyclic moieties are strategically placed to provide local structural reinforcement and prevent vulnerability to metal and Lewis acid attacks, while maintaining the overall polymer chain integrity and functionality.
Solution Approach 2:
The patent employs preliminary action by incorporating cyclic structures during the polymerization process itself, rather than attempting to repair or modify polymer backbones after synthesis. This preliminary incorporation of protective cyclic moieties prevents the formation of weak points during the synthesis stage, ensuring inherent backbone stability.
2Productivity
If conventional polymerization methods are used to synthesize PFPE polymers, then polymers can be produced, but the synthesis process is complex and yields are not optimized
Solution Approach 1:
The patent applies segmentation by dividing the polymerization process into distinct stages: first polymerizing perfluoroepoxides to form the basic polymer chain, then selectively introducing cyclic structures through ring-opening polymerization of cyclic carbonate esters. This segmentation allows optimization of each step independently, improving overall yield and simplifying process control compared to single-step conventional methods.
Solution Approach 2:
The patent uses an intermediary approach by introducing cyclic carbonate ester compounds as intermediate building blocks that contain pre-formed cyclic structures. These intermediaries undergo ring-opening polymerization to incorporate cyclic moieties into the polymer backbone, simplifying the synthesis process compared to direct one-step formation of cyclic structures and improving both yield and structural control.
3Manufacturing precision
If homopolymers with ordered structures are synthesized, then polymers with single recurring units are obtained, but the structural variety and functional tunability are limited
Solution Approach 1:
The patent applies merging by combining multiple polymerization processes and incorporating different types of recurring units (from perfluoroepoxides and cyclic carbonate esters) into a single polymer system. This creates copolymers with both linear and cyclic structures coexisting in the same backbone, achieving both structural precision through controlled polymerization and functional versatility through diverse recurring units.
Solution Approach 2:
The patent employs composite material principles by creating polymers that combine different structural motifs (linear perfluoroepoxide units and cyclic carbonate ester units) within the same polymer chain. This composite structure allows the polymer to exhibit both the ordered structure benefits of homopolymers and the functional diversity of copolymers, enabling precise structural control and tailored functionality.
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 method enables the production of polymers with predetermined cyclic structures, enhancing their mechanical properties and lubricant performance, achieving high yields and convenient industrial-scale synthesis.
Implementation Method 1
A process involving the reaction of fluorinated compounds with acyl-fluoride groups and hydrogenated compounds containing fluoroformate groups in the presence of fluoride-containing compounds, allowing for the formation of polymers with regularly alternated recurring units comprising cyclic moieties
Data Source
AI summary
The present invention relates to a process for the synthesis of partially and fully fluorinated polyether (PFPE) polymers comprising cyclic moieties in the backbone chain, to PFPE polymers obtained therefrom and to the use of said PFPE polymers as intermediate compounds for the manufacture of additives for plastic and glass coating.