N-alkyl lactam ethers replacing chlorinated solvents
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Solution Overview
Problem
Current fluids used in performance chemicals, personal care, and pharmaceutical applications often exhibit undesirable characteristics such as toxicity, limited solvency, and suboptimal properties like restricted freezing/boiling points or solubility profiles, which hinder their effectiveness and safety.
Innovation Solution
Development of a class of ethers comprising at least two lactam rings, specifically N-alkyl lactam ethers, which can be synthesized to serve as versatile solvents, solubilizers, cleaning agents, and freezing point depressors, offering improved safety and performance profiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If chlorinated hydrocarbons are used as cleaning fluids, then grease-cutting ability is improved, but toxicological safety deteriorates
Solution Approach 1:
The patent changes the chemical composition parameters by replacing chlorinated hydrocarbons with lactam-based ethers (N-alkyl lactam ethers with specific molecular structures), thereby maintaining cleaning effectiveness while eliminating toxicological hazards associated with chlorine-containing compounds
Solution Approach 2:
The invention uses composite molecular structures combining lactam rings with ether linkages and alkyl chains to create multifunctional molecules that simultaneously provide excellent grease-cutting properties, water solubility, and low toxicity, resolving the contradiction between cleaning power and safety
2Object-generated harmful factors
If effective cleaning fluids are used, then cleaning performance is improved, but water solubility deteriorates
Solution Approach 1:
The patent applies local quality by incorporating hydrophilic ether oxygen atoms and lactam carbonyl groups at specific positions within the molecular structure, creating localized polar regions that enable water solubility while the alkyl chains maintain hydrophobic grease-interaction capabilities
Solution Approach 2:
By adjusting the alkyl chain length and ether linkage positions in the lactam ether structure, the patent optimizes the balance between hydrophobic cleaning action and hydrophilic water solubility, achieving both effective cleaning performance and complete water miscibility
3Object-affected harmful factors
If fluids are designed to meet toxicological and environmental considerations, then safety is improved, but solvency and freezing/boiling point ranges deteriorate
Solution Approach 1:
The lactam ether molecules are designed as multifunctional compounds that simultaneously provide safety (low toxicity), broad solvency (ability to dissolve multiple types of substances), and thermal stability (appropriate freezing and boiling points), eliminating the need to compromise one property for another
Solution Approach 2:
The composite molecular structure combining rigid lactam rings with flexible alkyl chains and ether linkages creates molecules that exhibit both thermal stability from the ring structures and broad solvency from the flexible chains, while maintaining safety through the absence of toxic functional groups
Data Source
AI summary
Described is a class of symmetrical and asymmetrical N-alkyl lactam ethers. One preferred ether is bis-N-ethyl pyrrolidone ether. Preferred compositions and uses of the ethers are in performance chemicals, personal care, and pharmaceutical fields, where they function a variety of roles, including as a solvent, solubilizer, freezing point depressor, diluent, extracting agent, cleaning agent, degreaser, absorbent and/or dispersion agent.