Tin-Free Silane Crosslinkable Resin for Low-Odor Wire Insulation
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Solution Overview
Problem
Existing silane crosslinkable resin compositions using organic tin compounds as catalysts face issues with environmental hormone concerns, odor generation, and trade-offs between crosslinking rate and density, leading to manufacturability and appearance defects.
Innovation Solution
A silane crosslinkable resin composition using a silanol condensation catalyst with a specific chemical structure (Formula (1)) and a mass reduction rate of less than 10.0% at 100°C for 30 minutes, excluding tin-containing catalysts, to achieve an adequate crosslinking rate while suppressing odor and ensuring high crosslinking density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If organic tin compound is used as silanol condensation catalyst, then crosslinking rate and crosslinking density are improved, but environmental hormone action and safety concerns occur
Solution Approach 1:
The patent changes the chemical composition parameter of the catalyst from organic tin compound to organic aluminum compound, maintaining catalytic functionality while eliminating environmental hormone action. The aluminum compound provides similar crosslinking promotion without the harmful effects of tin compounds.
Solution Approach 2:
The patent uses a readily available organic aluminum compound as a substitute for organic tin compound, achieving the same technical effect with a more environmentally friendly and safer material that does not require special handling or disposal procedures.
2Object-affected harmful factors
If organic sulfonic acid or zinc carboxylate is used as silanol condensation catalyst, then tin-containing catalyst is replaced, but odor generation and environmental load increase
Solution Approach 1:
The patent changes the catalyst type from organic sulfonic acid or zinc carboxylate to organic aluminum compound, which does not generate pungent odor during crosslinking reaction. This parameter change eliminates both tin-containing catalysts and odor-generating catalysts simultaneously.
3Object-generated harmful factors
If production temperature is reduced to suppress odor generation, then odor and excessive crosslinking rate increase are suppressed, but crosslinking density decreases
Solution Approach 1:
The patent changes the catalyst chemical composition to organic aluminum compound, which allows maintaining production temperature and achieving high crosslinking density without generating odor. The aluminum compound provides stable catalytic activity across a wide temperature range without decomposition.
4Manufacturing precision
If production temperature is reduced to suppress excessive crosslinking rate increase, then appearance defects are suppressed, but crosslinking density decreases
Solution Approach 1:
The patent changes the catalyst to organic aluminum compound that provides stable and controlled catalytic activity, preventing both excessive crosslinking rate increase and appearance defects while maintaining high crosslinking density at normal production temperatures.
5Productivity
If silanol condensation catalyst is used to accelerate crosslinking reaction, then crosslinking rate increases, but catalyst decomposition and appearance defects occur
Solution Approach 1:
The patent changes the catalyst from compounds that decompose at high temperature to organic aluminum compound with high thermal stability. The aluminum compound maintains catalytic activity without decomposing, thus achieving high crosslinking rate without appearance defects.
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 composition enables a crosslinking reaction with excellent manufacturability, producing a silane crosslinked resin with high crosslinking density and improved appearance without environmental hormone issues.
Implementation Method 1
In the silane crosslinking method, a silanol condensation reaction is performed as a final crosslinking reaction
Implementation Method 2
As a silanol condensation catalyst that causes or accelerates this condensation reaction, various compounds can be used
Implementation Method 3
a silanol condensation catalyst with a specific chemical structure (Formula (1)) and a mass reduction rate of less than 10.0% at 100°C for 30 minutes
Data Source
AI summary
Provided are a silane crosslinkable resin composition containing at least one kind of silanol condensation catalyst represented by a specific formula and having a mass reduction rate of less than 10.0% when heated at 100°C for 30 minutes, and not containing a tin-containing silanol condensation catalyst, and a silane crosslinked resin formed body and an electric wire using the silane crosslinkable resin composition.