Amine Vinyldisiloxane Elastomers for Tire Grip and Rolling Resistance
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Solution Overview
Problem
Existing elastomeric polymers used in tire production face a challenge in achieving a balanced performance between low rolling resistance and high wet grip, while maintaining satisfactory processing and mechanical properties.
Innovation Solution
The use of amine-containing vinyldisiloxane compounds as modifying monomers during the polymerization process, which create both covalent and coordinative bonds with fillers like silica or carbon black, resulting in improved interaction and properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the polystyrene unit concentration is reduced with respect to the total polybutadiene unit concentration, then the glass transition temperature is reduced and both tan δ at 60° C. and tan δ at 0° C. are reduced, but rolling resistance is reduced at the expense of deteriorated wet grip performance
Solution Approach 1:
The invention changes the chemical composition parameters by introducing amine-containing vinyldisiloxane units with specific structures (Formula 1 and Formula 2) containing tertiary amino groups. This chemical parameter change allows independent optimization of rolling resistance and wet grip by controlling the type and amount of amine-containing units, rather than simply adjusting polystyrene-to-polybutadiene ratios.
Solution Approach 2:
The invention creates a composite polymer structure combining conjugated diene units, aromatic vinyl units, and amine-containing vinyldisiloxane units. The amine-containing units act as a functional component that simultaneously influences both rolling resistance and wet grip properties, creating a multi-functional composite material system.
2Reliability
If amine-containing vinyldisiloxane compounds are used as modifying monomers, then the interaction with fillers like silica or carbon black is improved, but the complexity of the polymerization process increases
Solution Approach 1:
The amine-containing vinyldisiloxane units serve multiple functions simultaneously: they act as polymer chain components, provide filler interaction sites through tertiary amino groups, and influence polymer microstructure. This multi-functionality reduces the need for separate additives or post-modification steps, simplifying the overall process despite the complex monomer structure.
Solution Approach 2:
The filler-interacting amine groups are incorporated into the polymer chain during the polymerization process itself, rather than being added separately afterward. This preliminary incorporation ensures uniform distribution and optimal interaction with fillers throughout the polymer matrix, simplifying subsequent processing steps.
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 resulting vulcanized polymer compositions exhibit an enhanced balance of low rolling resistance and high wet grip, along with good processing and mechanical properties.
Implementation Method 1
create both covalent and coordinative bonds with fillers like silica or carbon black
Implementation Method 2
create both covalent and coordinative bonds with fillers like silica or carbon black
Data Source
AI summary
The present invention relates to amine-containing vinyldisiloxane compounds which are useful in the manufacture of elastomeric polymers that can be used in rubber articles such as tires. The present invention further relates to a process for preparing an elastomeric polymer in the presence of vinyldisiloxane compounds, an elastomeric polymer obtainable by such process, non-vulcanized and vulcanized polymer compositions comprising the elastomeric polymer and articles comprising one or more components formed from the vulcanized polymer composition, such as tires or components thereof.