A heat-resistant and wear-resistant O-type sealing ring and a preparation method thereof
Through the modification of montmorillonite and the synthesis of rubber, heat-resistant and wear-resistant O-type sealing rings are prepared, which solves the problem of insufficient performance of existing sealing rings in high temperature and high pressure and wear environments, and achieves higher heat, wear and barrier properties.
CN119081244BActive Publication Date: 2025-03-28JIANGSU ZHONGYU RUBBER & PLASTIC TECH CO LTD
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Patent Information
- Application Number
- CN202411433357.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2044-10-15
AI Technical Summary
Technical Problem
The existing O-rings show poor heat and wear resistance in environments with high temperature and high pressure and a wide range of wear particles, resulting in seal failure.
Method used
Montmorillonite was modified by synthesizing naphthylvinylsiloxane coupling agent, and the modified montmorillonite was mixed and vulcanized with natural rubber and methylvinyl silicone rubber to prepare a heat-resistant and wear-resistant O-type sealing ring.
Benefits of technology
The uniform dispersion of modified montmorillonite in the rubber matrix and the bridge function of naphthyl vinyl siloxane coupling agent improves the heat and wear resistance of the sealing ring, and forms a tight network structure, which enhances the barrier properties.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention relates to the technical field of sealing ring products, and discloses a heat-resistant and wear-resistant O-type sealing ring and a preparation method thereof. Methylvinyldichlorosilane, 2-hydroxy-6-naphthoic acid, γ-glycidyloxypropyltrimethoxysilane and the like are used as raw materials to synthesize a naphthylvinylsiloxane coupling agent, and then montmorillonite is modified. Finally, the heat-resistant and wear-resistant O-type sealing ring is obtained through mixing and vulcanization. The addition of the coupling agent improves the dispersion of the montmorillonite in a rubber matrix, so that the originally incompatible inorganic phase and organic phase can be well dispersed with each other through the bridge effect of the coupling agent, and the rubber macromolecular chain can enter between the montmorillonite sheets to achieve nanometer-scale dispersion. The modified montmorillonite is very similar in structure to a natural rubber and a silicone rubber matrix, and has relatively strong compatibility. The three act synergistically to form a unique interpenetrating network structure, and can well improve the wear resistance, heat resistance and barrier properties of the sealing ring.
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