Functionalized Processing Aid for Rubber Silane Cardanol Bonding
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Solution Overview
Problem
Conventional rubber processing aids generate excessive volatile organic compounds and cause blooming issues, while silica reinforcement in tires lacks bonding strength with rubber, leading to inadequate wet traction, abrasion performance, and fuel efficiency.
Innovation Solution
A functionalized processing aid combining a silane-based compound and a cardanol-derived structure, enhancing compatibility and bonding with silica, is developed, along with a method of preparing this aid and incorporating it into a rubber composition to improve processability and mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional extender oils are used to improve processability, then moldability and processability are improved, but volatile organic compounds are excessively generated and blooming phenomenon occurs
Solution Approach 1:
The patent changes the molecular weight parameter of the processing aid from low (conventional extender oils) to high (1,500-50,000 g/mol), which reduces VOC generation and blooming while maintaining processability. This parameter change transforms the processing aid into a polymer compound that remains trapped within the rubber matrix.
Solution Approach 2:
The patent creates a composite processing aid combining polymer backbone structures with silane functional groups and cardanol-derived structures. This composite design provides both the high molecular weight needed to prevent VOC emission and the specific chemical functionalities needed for silica compatibility and bonding.
2Object-affected harmful factors
If silica is used as reinforcing material to replace carbon black, then environmental friendliness is improved, but bonding strength with rubber is insufficient
Solution Approach 1:
The patent introduces a coupling agent with silane and cardanol structures as an intermediary between silica and rubber. This coupling agent has affinity for both silica (through silane groups) and rubber (through cardanol-derived hydrophobic structures), creating strong interfacial bonding and improving wet traction and abrasion resistance.
Solution Approach 2:
The patent develops a composite system where silica particles are strongly bonded to rubber through the coupling agent, creating a tri-component composite structure (silica-coupling agent-rubber) that overcomes the inherent incompatibility between hydrophilic silica and hydrophobic rubber.
3Ease of operation
If processing aid is introduced to improve moldability, then processability is improved, but compatibility with reinforcing agent is insufficient
Solution Approach 1:
The patent designs the processing aid to perform multiple functions simultaneously: it acts as a processing aid for moldability, a coupling agent for silica-rubber bonding, and a dispersant for uniform silica distribution. The multi-functional design includes polymer chains for processability, silane groups for silica bonding, and cardanol structures for rubber compatibility.
Solution Approach 2:
The patent creates a composite processing aid structure that integrates polymer backbone (for processability), silane functional groups (for silica compatibility), and cardanol-derived structures (for rubber compatibility), enabling simultaneous achievement of moldability and reinforcing agent compatibility.
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 processing aid improves the bonding strength between rubber and silica, enhancing mechanical and dynamic properties, such as fuel efficiency, abrasion resistance, and ice grip, while reducing volatile organic compound emissions and blooming phenomena.
Implementation Method 1
a functionalized processing aid represented by the following Chemical Formula 1 in which a silane-based compound and a cardanol-derived structure are combined
Data Source
AI summary
Embodiments of the present invention provide a functionalized processing aid represented by the following Chemical Formula 1 in which a silane-based compound and a cardanol-derived structure are combined, a preparation method thereof, and a rubber composition including the same:(R1)3Si—R2—Z-(E)n [Chemical Formula 1]in Chemical Formula 1, the definitions of R1, R2, Z, E, and n are as described in the specification.