Rubber Compound Vulcanization Using Halogenated Graphite Activators
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Solution Overview
Problem
The use of zinc oxide as a vulcanization activator in rubber compounds poses environmental concerns, and limiting its use compromises the mechanical characteristics of the resulting rubber products, necessitating an alternative that maintains effective vulcanization without altering mechanical properties.
Innovation Solution
Halogenated graphite, specifically fluorinated graphite, is used as a replacement for zinc oxide in rubber compounds, functioning as a vulcanization activator while maintaining the mechanical characteristics of the resulting compounds, with optimal usage between 0.1 and 100 phr, preferably 0.5 and 20 phr.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If zinc oxide is used as a vulcanization activator, then effective vulcanization is achieved, but environmental harm increases
Solution Approach 1:
The invention changes the chemical composition parameter by replacing zinc oxide with halogenated graphite (specifically fluorinated graphite), thereby eliminating the harmful environmental factor while maintaining the vulcanization activator function through a different chemical substance with equivalent or superior performance
2Object-affected harmful factors
If zinc oxide usage is limited, then environmental harm is reduced, but vulcanization effectiveness deteriorates
Solution Approach 1:
The invention completely changes the activator substance from zinc oxide to halogenated graphite, allowing for complete elimination of harmful ZnO while actually improving or maintaining vulcanization effectiveness through the superior performance characteristics of the halogenated graphite compound
3Object-affected harmful factors
If zinc oxide is replaced with alternative activators, then environmental harm is reduced, but mechanical characteristics may be altered
Solution Approach 1:
The invention changes the chemical composition to halogenated graphite while carefully controlling the concentration parameter (0.1-100 phr, preferably 0.5-20 phr) to maintain optimal mechanical properties, thereby eliminating environmental harm without compromising strength
Solution Approach 2:
The invention uses halogenated graphite as a composite vulcanization activator system that combines the graphite base material with halogen functional groups, creating a composite substance that provides both environmental benefits and maintained mechanical performance through synergistic effects
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
Halogenated graphite effectively replaces zinc oxide, ensuring unaltered vulcanization and mechanical properties of rubber compounds, as demonstrated by comparable cross-linking, rheometric, mechanical, and dynamic mechanical properties with zinc oxide-containing compounds, independent of the reinforcing filler type.
Implementation Method 1
a vulcanization system comprising at least sulfur, one or more vulcanization accelerants and a vulcanization activator; said compound being characterized in that said vulcanization activator is exclusively halogenated graphite
Implementation Method 2
a cross-linkable unsaturated chain polymer base
Data Source
AI summary
A compound for the preparation of rubber products comprising a cross-linkable unsaturated chain polymer base, a reinforcing filler and a vulcanization system. The vulcanization system comprises at least sulfur, one or more vulcanization accelerants and a vulcanization activator consisting of halogenated graphite.