Modified Diene Polymer Composition for Low-Rolling-Resistance Tires
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional rubber materials for automobile tires lack the necessary strength and fuel efficiency to meet modern environmental and performance demands, requiring a material that can produce crosslinked rubber with enhanced durability and reduced rolling resistance.
Innovation Solution
A modified conjugated diene-based polymer is produced by reacting a conjugated diene-based polymer with a specific compound [A] to create a polymer composition that includes silica and a crosslinking agent, resulting in a tire with improved strength and fuel efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional rubber materials are used for tire production, then basic tire functionality is achieved, but the tensile strength and fuel efficiency (rolling resistance) are insufficient to meet modern environmental and performance demands
Solution Approach 1:
The patent uses a composite material system consisting of modified conjugated diene-based polymer combined with silica and a crosslinking agent. The modification introduces specific functional groups that enable strong interaction between the polymer and silica, creating a composite structure that simultaneously achieves high tensile strength and low rolling resistance through optimized interfacial bonding and reduced hysteresis loss.
Solution Approach 2:
The patent changes the chemical parameters of the conjugated diene-based polymer by introducing specific modifications that alter its interaction with silica and crosslinking behavior. This modification transforms the polymer's physical and chemical properties, enabling it to achieve both high strength and fuel efficiency by controlling the molecular structure and bonding characteristics.
2Duration of action of stationary object
If conventional rubber materials are used, then basic durability is achieved, but extended service life and reduced environmental load cannot be realized
Solution Approach 1:
The composite material system of modified polymer, silica, and crosslinking agent creates a durable rubber composition that extends service life through enhanced mechanical properties and resistance to degradation. The strong polymer-silica bonding and controlled crosslinking structure reduce material wear and aging, thereby extending tire life and reducing environmental impact from frequent replacements.
3Strength
If modified conjugated diene-based polymer with compound [A] is used, then high strength and fuel efficiency are achieved, but manufacturing complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-modifying the conjugated diene-based polymer with specific functional groups before the crosslinking step. This pre-modification ensures optimal interaction with silica and crosslinking agents, simplifying the overall manufacturing process by eliminating the need for complex post-processing or multiple sequential steps to achieve the desired performance.
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 modified polymer composition achieves high strength and excellent fuel efficiency, as evidenced by increased tensile strength and reduced rolling resistance in tire applications.
Implementation Method 1
reacting a conjugated diene-based polymer having an active terminal with a compound [A] represented by formula (1)
Implementation Method 2
a polymer composition, a crosslinked product, and a tire
Data Source
AI summary
A modified conjugated diene-based polymer is produced by a method reacting a conjugated diene-based polymer having an active terminal, which is a polymer obtained by polymerizing a monomer including a conjugated diene compound in the presence of an alkali metal compound, with a compound [A] represented by formula (1). In formula (1), each of R1 and R2 represents a C1 to C8 hydrocarbyl group and the like; each of R5 and R6 represents a C1 to C8 hydrocarbyl group and the like; each of R3 and R4 represents a C1 to C6 hydrocarbylene group; R7 represents a C1 to C10 hydrocarbylene group; X1 represents a C1 to C4 hydrocarbyloxy group; each of X2 and X3 represent a C1 to C4 hydrocarbyl group or hydrocarbyloxy group; m is an integer of 1 to 3.