Multidentate Ligand Functionalized Elastomer for Tire Fillers
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Solution Overview
Problem
Rubbery polymers used in tires and industrial products face challenges in achieving optimal compatibility with fillers like carbon black and silica, which affects their performance and interaction with metal ions.
Innovation Solution
A rubber composition is developed featuring a functionalized elastomer with a polymeric backbone derived from conjugated diene and vinyl aromatic monomers, incorporating a multidentate ligand capable of complexing with metal ions, enhancing interaction and adhesion with fillers and reinforcement materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional rubbery polymers are used, then the material is simple and easy to manufacture, but the compatibility and interaction with fillers such as carbon black and silica are insufficient
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of the elastomer through functionalization with multidentate ligands. This changes the chemical parameters of the polymer to enable coordination complex formation with metal ions on filler surfaces, thereby improving compatibility and interaction without fundamentally changing the base polymer structure
Solution Approach 2:
The patent creates a composite material system by combining functionalized elastomer with metal-containing fillers. The multidentate ligands on the elastomer form coordination complexes with metal ions on the filler surfaces, creating a synergistic composite that improves both filler compatibility and material performance
2Reliability
If conventional capping agents are used to functionalize polydiene, then the process is simple, but the interaction strength and adhesion with metal ions are limited
Solution Approach 1:
The patent changes the chemical parameters by replacing conventional monodentate capping agents with multidentate ligands. This parameter change in the functional group structure enables stronger coordination complex formation with metal ions through multiple binding sites, significantly enhancing interaction strength and adhesion
Solution Approach 2:
The multidentate ligand acts as an intermediary between the elastomer and metal ions. It provides multiple coordination sites that mediate the interaction between the polymer and metal-containing fillers, creating stronger and more stable bonds than conventional capping agents
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 functionalized elastomer improves the modulus and interaction with fillers, leading to enhanced adhesion and performance in tire applications, such as improved interaction with metalated fillers and reinforcement materials.
Implementation Method 1
a functional group comprising a multidentate ligand capable of complexing with a metal ion
Data Source
AI summary
The present invention is directed to a rubber composition comprising: a functionalized elastomer comprising: a polymeric backbone chain derived from a monomer comprising at least one conjugated diene monomer and optionally at least one vinyl aromatic monomer; and a functional group bonded to the backbone chain, the functional group comprising a multidentate ligand capable of complexing with a metal ion; and a metal ion.The invention is further directed to a pneumatic tire comprising the rubber composition.