Crosslinkable Tire Rubber Composition for Higher Tear Strength
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Solution Overview
Problem
Existing rubber compositions for tires do not provide sufficient mechanical strength, particularly in terms of tear strength.
Innovation Solution
A rubber composition comprising specific compounds such as those represented by formulas (1) to (7) and 3-methyl-5-pyrazolone, which form a crosslinked product with the rubber component to enhance tear strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional rubber compositions comprising carbon black and triazole compounds are used, then the tire can be produced with basic mechanical properties, but the tear strength is insufficient
Solution Approach 1:
The patent changes the chemical structure parameters of the rubber composition by introducing compounds with specific functional groups (hydrazide, N'-alkylidene hydrazide, N-allyl carbamoyl, 3-carboxyl acryloyl, hydrazine carboxyamino, thiocarboxyl, or thiol groups) at specific positions in the molecular structure. These parameter changes in chemical composition lead to improved tear strength while maintaining other mechanical properties
Solution Approach 2:
The patent creates a composite rubber material by combining the rubber component with specifically structured compounds containing heteroatoms (N, O, S) and functional groups. This composite approach enhances the tear strength by creating synergistic interactions between the rubber matrix and the added compounds with specific molecular structures
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 rubber composition significantly improves the tear strength of tires, enhancing their mechanical properties.
Implementation Method 1
which form a crosslinked product with the rubber component to enhance tear strength
Data Source
AI summary
A rubber composition comprising at least one member selected from the group consisting of compounds represented by the following formulas (1) to (7) and 3-methyl-5-pyrazolone, and a rubber component:wherein the R group is a hydrazide group, an N′-alkylidene hydrazide group, an N-allyl carbamoyl group, a 3-carboxyl acryloyl group, a hydrazine carboxyamino group, a thiocarboxyl group, a thiol group, or a hydrogen atom; R4 is a sulfur atom or an oxygen atom; R5 is a thiol group or a hydroxy group; R6 is a C1-4 alkylene group; R7 is an alkyl group, an aralkyl group, an aryl group, or a heterocyclic group; R8 is a hydrogen atom or an amino group; R9 is a heteroatom; and R10 is a heterocyclic group.