Silicon Phosphorus Modified Diene Rubber for Tire Performance
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Solution Overview
Problem
Existing methods for modifying conjugated diene rubber to improve compatibility with reinforcing agents like silica and carbon black are complex, do not effectively enhance storage stability, and often result in insufficient performance improvements.
Innovation Solution
A modified conjugated diene rubber containing silicon and phosphorus atoms, specifically a polymer structure with a double bond connecting phosphorus and oxygen, is developed, along with a manufacturing method involving the reaction of a conjugated diene rubber with a compound containing silicon and phosphorus, which improves molecular weight distribution and coupling ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional modification methods (two-stage silane modification or adding separate coupling agents) are used to improve compatibility with reinforcing agents, then the rubber's compatibility with silica/carbon black is improved, but the manufacturing process becomes complicated and difficult to implement
Solution Approach 1:
The patent combines silicon and phosphorus modification into a single stage process. The silane compound with phosphorus-containing functional groups (such as phosphonic acid, phosphinic acid, or phosphate esters) performs dual functions: silane coupling with the rubber backbone and phosphorus interaction with reinforcing agents, eliminating the need for separate modification steps and coupling agents.
Solution Approach 2:
The modified rubber contains both silane groups for coupling with the polymer matrix and phosphorus groups for interacting with reinforcing agents like silica and carbon black. This multi-functional modifier replaces multiple separate additives, simplifying the formulation while maintaining or improving compatibility with various reinforcing agents.
2Strength
If existing modification techniques are applied to enhance performance, then some mechanical properties are improved, but storage stability of the modified rubber is not effectively enhanced
Solution Approach 1:
The patent modifies the chemical structure by introducing phosphorus-containing functional groups (phosphonic acid, phosphinic acid, or phosphate esters) alongside silane groups. This structural parameter change creates a more stable modified rubber that maintains both improved mechanical properties and enhanced storage stability, likely due to the strong bonding capabilities of phosphorus with both the rubber matrix and reinforcing agents.
3Reliability
If multiple separate modifiers are used to achieve superior performance, then the rubber's performance is improved, but the manufacturing process becomes more complex and less easy to implement
Solution Approach 1:
The invention merges multiple modification functions into a single compound: silane groups for polymer coupling and phosphorus-containing functional groups for reinforcing agent interaction. This single-stage modification process using one multifunctional compound is much easier to implement than sequential modifications with multiple separate agents, improving ease of manufacture while maintaining superior performance.
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 modified rubber exhibits enhanced molecular weight, improved storage stability, and superior mechanical properties, such as reduced rolling resistance and increased wet-skid resistance, leading to improved handling stability and reliability in tire applications.
Implementation Method 1
a method for manufacturing the modified rubber, comprising: step (a): providing a conjugated diene rubber; and step (b): providing a compound containing silicon and phosphorus to react with the conjugated diene rubber
Data Source
AI summary
The present invention provides a modified rubber containing silicon and phosphorus, and a composition and manufacturing method thereof. The present invention provides the modified rubber structured as formula (1),wherein X is selected from a C1-C12 alkylene group, a C2-C12 alkenylene group, a C3-C12 alicyclic group, and a C6-C12 aromatic group; and A1, A2, A3, Y, and Z are each independently selected from an alkyl group, an alkoxy group, a halide group, and a conjugated diene rubber, wherein the conjugated diene rubber is a polymer composed of a conjugated diene monomer or the conjugated diene monomer with a vinyl aromatic monomer, A1, A2, A3, Y, and Z are the same or different from each other, and at least one of A1, A2, A3, Y, and Z is the conjugated diene rubber.