Tire Rubber Polymer Composition for Grip and Rolling Resistance
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Solution Overview
Problem
Existing rubber compositions for tires face a challenge in achieving a balanced performance between grip and rolling resistance.
Innovation Solution
A polymer composition comprising a conjugated diene polymer with specific structural units and hydrogenated products of polymers of raw materials, including olefins with alicyclic structures and C9 fractions, is developed to enhance grip performance and reduce rolling resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional rubber compositions are used, then manufacturing is straightforward, but grip performance and rolling resistance balance is insufficient
Solution Approach 1:
The patent uses composite materials by combining conjugated diene polymer (A-1) with specific structural units derived from aromatic vinyl compounds and a hydrogenated petroleum resin component (B). This composite approach achieves both high grip performance and low rolling resistance through the synergistic interaction between the polymer components, resolving the contradiction between performance improvement and composition complexity.
Solution Approach 2:
The patent applies parameter changes by precisely controlling the structural parameters of the conjugated diene polymer, specifically limiting the aromatic vinyl compound units to form isolated segments or short sequences (not continuous sequences of 8 or more units). This parameter control optimizes the polymer's viscoelastic properties to achieve the desired grip and rolling resistance balance.
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 polymer composition results in tires with improved grip performance and reduced rolling resistance.
Implementation Method 1
a hydrogenated product of a polymer of a raw material component containing an olefin having an alicyclic structure with a five-membered ring
Data Source
AI summary
[Problem] To provide a polymer composition that can be used to produce tire products having high grip performance and low rolling resistance. [Solution] The polymer composition of the present invention includes: a rubber component including a conjugated diene polymer (A-1); and at least one selected from the group consisting of a hydrogenated product of a polymer of a raw material component including an olefin having an alicyclic structure with a five-membered ring, and a hydrogenated product of a C9 fraction containing an aromatic olefin and a polymer of a raw material component including an olefin having an alicyclic structure with a five-membered ring, in which the conjugated diene polymer (A-1) comprises a structural unit derived from a conjugated diene compound and a structural unit derived from an aromatic vinyl compound; the amount of the structural unit derived from an aromatic vinyl compound is 5% by mass or more and 60% by mass or less with respect to the total amount of the structural unit derived from a conjugated diene compound and the structural unit derived from an aromatic vinyl compound; and the amount of a segment including isolated aromatic vinyl compound units in which the aromatic vinyl compound units are not continuous is less than 40% by mass, and the amount of a segment including a long sequence of consecutive aromatic vinyl compound units in which 8 or more aromatic vinyl compound units are continuous is 10% by mass or less, with respect to the amount of the structural unit derived from an aromatic vinyl compound.