Zinc Carboxylate Accelerator for Copolymerization
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Solution Overview
Problem
Existing electrical insulation systems in machines face variability in curing characteristics due to batch differences in crude oil-derived zinc naphthenate, leading to inconsistent copolymerization and impregnation, which affects the quality and reliability of electrical insulation bodies.
Innovation Solution
A compound with the structural formula R1CO2− R2CO2− Zn2+ is used as a reaction accelerator for copolymerization, where R1 and R2 are straight-chain or branched alkyl groups, ensuring uniform quality and consistent impregnation characteristics, replacing conventional zinc naphthenate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If zinc naphthenate is used as reaction accelerator, then the copolymerization can be accelerated, but the curing characteristics vary from batch to batch due to crude oil composition differences
Solution Approach 1:
The patent changes the chemical parameters of the reaction accelerator by specifying exact molecular structures (R1 and R2 alkyl groups with 6-10 carbon atoms) rather than using a complex mixture. This parameter specification ensures uniform composition across batches while maintaining the copolymerization acceleration function.
Solution Approach 2:
The invention replaces the heterogeneous zinc naphthenate mixture with a homogeneous compound having a defined structural formula. This homogeneity eliminates batch-to-batch variations in curing characteristics while preserving the essential accelerator function.
2Productivity
If zinc naphthenate is used as reaction accelerator, then the copolymerization can be accelerated, but complex preparation processes are required to adjust pH, acid number and viscosity for each batch
Solution Approach 1:
The patent simplifies the preparation process by defining specific molecular structure parameters (R1 and R2 alkyl groups) that inherently provide the desired pH, acid number, and viscosity characteristics, eliminating the need for complex adjustments of each batch.
Solution Approach 2:
The invention extracts and specifies only the essential functional components (the carboxylate groups coordinated to zinc) while removing the complex crude oil mixture components that require adjustment, thereby simplifying the preparation process.
3Ease of manufacture
If conventional zinc naphthenate is used, then the electrical insulation tape can be impregnated with synthetic resin, but the impregnation characteristics vary due to batch differences
Solution Approach 1:
The patent achieves uniform impregnation characteristics by using a homogeneous reaction accelerator compound with defined structure. This consistency in composition ensures reproducible impregnation behavior across different production batches.
Solution Approach 2:
By specifying the molecular structure parameters (R1 and R2 alkyl groups), the patent controls the physical and chemical properties that govern impregnation, ensuring uniform manufacturing results without batch variations.
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 approach ensures identical copolymerization and uniform impregnation, resulting in homogeneous electrical insulation bodies with improved thermal conductivity and extended lifespan, particularly when using mica or aluminum oxide, and reduces sensitivity to induced vibrations in end windings.
Implementation Method 1
a compound having the structural formula R1CO2− R2CO2− Zn2+ is used as a reaction accelerator for the copolymerization of a mixture of a carboxylic anhydride and an oxirane
Data Source
AI summary
A compound having the structural formula R1CO2− R2CO2− Zn2+ used as a reaction accelerator for the copolymerization of a mixture of a carboxylic acid anhydride and an oxirane, wherein R1 and R2 are a straight-chained or branched alkyl group independently of each other.