Segmented Silane Mixture for Rubber Reinforcement
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Solution Overview
Problem
Existing silane mixtures in rubber compounds fail to adequately improve rolling resistance, reinforcement, and abrasion resistance compared to prior art.
Innovation Solution
A silane mixture comprising specific silane formulas (I) (R1)y(R2)3-ySi—R3—SH and (II) (R1)y(R2)3-ySi—R3—(S—R4)z—Si(R1)y(R2)3-y, with R1, R2, R3, and R4 defined, in a molar ratio of 20:80-85:15, used to enhance the properties of rubber mixtures, potentially including oligomers formed from hydrolysis and condensation, applied to supports like silica with physical or chemical binding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional silane mixtures are used in rubber compounds, then basic crosslinking function is achieved, but rolling resistance, reinforcement, and abrasion resistance are not adequately improved
Solution Approach 1:
The silane crosslinking system is segmented into multiple functional components: a polysulfide-containing silane (providing crosslinking and reinforcement), a mono-functional silane (containing mercapto group for silane rubber crosslinking), and optionally a difunctional silane. Each component performs a specific function, and their combined use achieves superior abrasion resistance and reinforcement without requiring complex manufacturing processes.
Solution Approach 2:
The invention uses a composite silane mixture combining organosilicon compounds with different functional groups (polysulfide, mercapto, ethoxy) in specific ratios. This composite approach leverages the synergistic effects of different silane types to simultaneously improve abrasion resistance, reinforcement, and rolling resistance while maintaining manageable manufacturing complexity.
2Strength
If silane mixtures are used to improve reinforcement and abrasion resistance, then viscoelastic properties are enhanced, but rolling resistance may worsen
Solution Approach 1:
The invention optimizes the molecular structure parameters of the silane components, specifically using polysulfide bonds (—Sx—, where x=2-8) in the silane structure and controlling the ratio of different silane types. This parameter optimization enables the rubber compound to achieve high reinforcement while maintaining low rolling resistance by reducing hysteresis losses.
Solution Approach 2:
The silane mixture provides localized reinforcement at the filler-rubber interface through specific silane-filler and silane-rubber interactions. The polysulfide-containing silane localizes at the silica filler surface providing reinforcement, while the mercapto-containing silane localizes at the rubber matrix providing crosslinking, achieving both strength improvement and energy efficiency.
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 silane mixture significantly improves rolling resistance, reinforcement, and reduces abrasion in rubber mixtures, outperforming prior art in viscoelastic properties, resilience, and abrasion tests.
Implementation Method 1
The silane mixture according to the invention may comprise oligomers that form as a result of hydrolysis and condensation of the silanes of the formula I and/or silanes of the formula II
Implementation Method 2
The silane mixture according to the invention may comprise oligomers that form as a result of hydrolysis and condensation of the silanes of the formula I and/or silanes of the formula II
Implementation Method 3
The silane mixture according to the invention may have been applied to a silica, in which case the binding may be physical or chemical
Data Source
AI summary
The invention relates to silane mixtures comprising a silane of the formula I((R1)y(R2)3-ySi—R3—SH (I)and a silane of the formula II(R1)y(R2)3-ySi—R3—(S—R4)z—Si(R1)y(R2)3-y (II)where the molar ratio of silane of the formula I to silane of the formula II is 20:80-85:15.The silane mixture according to the invention can be prepared by mixing the silanes of the formula I and silanes of the formula II.