Polyether Coupling Agent for Rubber Filler Dispersion
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Solution Overview
Problem
Existing rubber compositions for tires face challenges in achieving improved processability, abrasion resistance, rolling resistance, and grip performance, especially when a large amount of filler is compounded, leading to poor mixing processability and inadequate reinforcement characteristics.
Innovation Solution
A rubber composition comprising 100 parts of rubber, 1 to 30 parts of a polyether with a specific formula, and 10 to 180 parts of a filler, where the polyether is derived from a C1 to C24 compound with 1 to 6 hydroxyl groups and a C2 to C24 alkylene group, enhancing the dispersability and kneadability of the filler, thereby improving the tire's performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a large amount of filler is compounded to improve abrasion resistance and reinforcement, then the tire performance is improved, but the mixing processability deteriorates
Solution Approach 1:
A polyol compound serving as a coupling agent acts as an intermediary between the filler and rubber matrix. This coupling agent improves the interfacial adhesion and dispersibility of filler particles, enabling effective incorporation of high filler content (10-180 parts per 100 parts rubber) while maintaining good mixing processability and avoiding agglomeration issues
2Reliability
If silica is used to reduce rolling resistance and improve grip, then the tire performance is improved, but the mixing processability deteriorates
Solution Approach 1:
The polyol coupling agent serves as a mediator that facilitates uniform dispersion of silica particles in the rubber matrix. By improving the interfacial compatibility between polar silica and non-polar rubber, it enables effective incorporation of silica at optimal levels for achieving low rolling resistance and high grip while maintaining excellent mixing processability
3Strength
If carbon black is used to improve abrasion resistance, then the tire performance is improved, but the mixing processability deteriorates with high filler content
Solution Approach 1:
The polyol coupling agent acts as a mediator that enhances the dispersion of carbon black particles throughout the rubber matrix. It improves the interfacial adhesion between filler and rubber, enabling effective incorporation of carbon black at high loading levels (up to 180 parts per 100 parts rubber) while maintaining good mixing processability and preventing particle agglomeration
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 exhibits excellent processability, abrasion resistance, rolling resistance, and grip performance, even with a high filler content, resulting in a tire that is superior in both economic and safety aspects, such as low rolling resistance and high grip, making it suitable for automobile tires.
Implementation Method 1
enhancing the dispersability and kneadability of the filler
Implementation Method 2
the polyether is derived from a C1 to C24 compound with 1 to 6 hydroxyl groups and a C2 to C24 alkylene group, enhancing the dispersability
Data Source
AI summary
A rubber composition for a tire containing 100 parts by weight of a rubber, 1 to 30 parts by weight of a polyether (E1) having the formula (I):R1—{(OCH2CH2CH2CH2)m(OA)n—OH}q (I)wherein R1 is a residue of a C1 to C24 compound having 1-6 hydroxyl groups, from which at least one hydroxyl group is removed, A Ls a C2 to C24 alkylene group other than a 1,4-butylene group, q is an integer of 1 to 6, and m and n are independently integers of 1 to 600, and/or the derivative thereof (E2) and 10 to 180 parts by weight of a filler, which is excellent in processability, silica dispersability abrasion resistance and wet braking performance, etc.