Sealing Composition Using Phyllosilicates to Prevent Valve Obstruction
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Solution Overview
Problem
Existing sealing compositions for repairing tires face issues with particle aggregation, leading to valve obstruction and inadequate puncture repair due to large natural rubber particle sizes and non-uniform distribution, as well as compositions without adhesives also causing valve obstruction.
Innovation Solution
Incorporating phyllosilicates like silica or kaolin with a controlled granulometric distribution into the sealing composition to prevent particle aggregation and enhance sealing capabilities, combined with synthetic latex and ethylene glycol, while maintaining optimal sealing power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If natural rubber particles with large dimension (approximately 1 micron) are used in sealing composition, then sealing capacity is maintained, but particle aggregation occurs resulting in creamy appearance and dispenser valve obstruction
Solution Approach 1:
The patent changes the granulometric distribution parameter of rubber particles from large dimension (1 micron) to fine dimension (0.01 to 0.1 micron). This parameter change prevents particle aggregation and creamy appearance while maintaining sealing capacity, and eliminates dispenser valve obstruction.
Solution Approach 2:
The patent creates a composite sealing composition combining fine rubber particles (0.01 to 0.1 micron) with adhesive agents and antifreeze agents. This composite structure maintains sealing effectiveness while preventing aggregation and valve obstruction that occurs with pure natural rubber compositions.
2Duration of action of stationary object
If sealing composition is kept for long periods, then adhesive particles aggregate with latex particles resulting in creamy appearance, but this aggregation causes dispenser valve obstruction and inadequate puncture repair
Solution Approach 1:
The patent changes the particle size parameter to fine dimension (0.01 to 0.1 micron) which prevents aggregation during long-term storage. The fine particles remain suspended uniformly in the composition without forming creamy aggregates, ensuring both storage stability and operational reliability.
Solution Approach 2:
Instead of using large particles that naturally settle and aggregate over time, the patent inverts the approach by using fine particles that remain suspended and stable during storage, preventing the aggregation problem that occurs with conventional compositions.
3Object-generated harmful factors
If compositions without adhesive agent are used, then adhesive-related aggregation is reduced, but dispenser valve obstruction still occurs due to particle aggregation
Solution Approach 1:
The patent changes the particle size to fine dimension (0.01 to 0.1 micron) which eliminates dispenser valve obstruction regardless of adhesive presence. The fine particles flow smoothly through the valve system without aggregation, solving the operational problem even in adhesive-free compositions.
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 solution stabilizes the composition, prevents valve obstruction, and maintains effective sealing performance at various temperatures, ensuring reliable tire repair.
Implementation Method 1
the particles of phyllosilicate and silica added to the sealing composition perform both a lubricating action on the composition, reducing aggregation of the particles of natural latex
Implementation Method 2
an adjuvant action during sealing of the puncture as they penetrate into the latex mixture during polymerisation, performing a mechanical reinforcement action
Data Source
AI summary
Sealing composition for repairing tires comprising: 15 to 80% of natural latex, 5 to 50% of synthetic latex, 10 to 60% of a glycol selected from ethylene glycol and propylene glycol and 0.05 to 5% of a mineral chosen from a phyllosilicate and silica having an average granulometric distribution in the range between 5 and 95 nm.