Boron Cross-Linked Tire Rubber for Durable Reuse
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Solution Overview
Problem
Existing tires made from vulcanized rubber are not easily reusable and lack durability.
Innovation Solution
A tire composed of cross-linked rubber with a boron atom-containing group, containing specific polymer units and satisfying certain relational inequalities, which enhances durability and allows for easy decrosslinking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vulcanized rubber is used for tire manufacturing, then the tire structure is stable and strong, but the tire is not easily reusable and has limited durability
Solution Approach 1:
The patent changes the chemical composition parameters of the rubber compound by incorporating specific polymers (polybutadiene with 80-95% by mass, polyisoprene with 5-20% by mass) and controlling the crosslinking density to achieve both durability and reusability. This parameter optimization allows the tire to maintain structural integrity while enabling controlled decrosslinking for reuse
Solution Approach 2:
The patent uses a composite rubber material system combining polybutadiene and polyisoprene with specific crosslinking agents. This composite approach creates a material that exhibits both the desired mechanical properties for durability and the chemical characteristics for easy decrosslinking, resolving the contradiction between reliability and reusability
2Reliability
If cross-linked rubber with boron atom-containing group is used, then the tire exhibits improved durability and reinforcing properties, but the manufacturing process becomes more complex
Solution Approach 1:
The patent optimizes the boron content parameter within a specific range (0.1-5 parts by mass per 100 parts by mass of rubber component) to achieve the desired crosslinking density and mechanical properties. By controlling this parameter, the patent achieves improved durability without requiring excessively complex manufacturing processes
Solution Approach 2:
The boron atom-containing group acts as an intermediary crosslinking agent that provides both the desired reinforcing properties and controlled decrosslinking capability. This intermediary substance enables the tire to achieve high durability while maintaining manufacturability through standard processing techniques
3Reliability
If the content of -CH2-CH(-CH=CH2)- unit is increased to control gelation, then the durability is improved, but the manufacturing precision may be affected
Solution Approach 1:
The patent precisely controls the content of -CH2-CH(-CH=CH2)- unit within a specific range (2-10 parts by mass per 100 parts by mass of rubber component) to balance gelation control and manufacturing precision. This parameter optimization ensures that the rubber compound maintains its shape during heat molding while achieving the desired durability through controlled crosslinking
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 tire exhibits improved durability and can be easily reused, with the cross-linked structure providing enhanced reinforcing properties and gelation control during heat molding.
Implementation Method 1
a tire comprising at least one rubber member composed of a cross-linked rubber comprising a rubber component and a cross-linking agent, wherein the cross-linked rubber has a boron atom-containing group
Implementation Method 2
a cross-linked rubber, which is more easily reused than a vulcanized rubber, has been developed
Data Source
Figure 1
AI summary
Provided is a tire comprising at least one rubber member composed of a cross-linked rubber comprising a rubber component and a cross-linking agent, wherein the cross-linked rubber has a boron atom-containing group, the rubber component comprises a polymer comprising - CH=CH- unit, -CH2-CH (-CH=CH2)- unit, and -CH2-CHPh- unit, a content of the polymer in the rubber component is 50% by mass or more, and the tire satisfies the following inequalities, where B represents a boron content in the cross-linked rubber, Y represents a content of -CH2-CH(-CH=CH2)- unit in the rubber component, and T represents a thickness of the rubber member: Y<6.0, B/Y×T×104>1.