The invention relates to the technical field of sealants, in particular to a preparation method of a self-healing non-vulcanized butyl sealant and application of the self-healing non-vulcanized butyl sealant in tires. The sealant is prepared from the following raw materials in parts by weight: 10-30 parts of butyl rubber, 20-40 parts of polyisobutene, 10-30 parts of styrene-isoprene-styrene, 5-30 parts of poly-alpha olefin, 5-15 parts of petroleum resin, 1-5 parts of an antioxidant, 1-5 parts of a coloring agent and 10-20 parts of rubber filling oil, and is prepared by the following steps: weighing the butyl rubber and other materials, mixing and stirring; adding part of polyisobutene, stirring uniformly, and then adding the rest polyisobutene and poly alpha olefin to be uniform; and adding the rubber filling oil, uniformly stirring, vacuumizing until the pressure is greater than or equal to 0.08 MPa, and discharging. The sealant prepared by the invention can still be normally used at low temperature and high temperature, a tire can have enough adhesive force to resist the centrifugal force of rotation of the tire during high-speed driving, meanwhile, a pricking nail does not leak air, normal driving of an automobile is maintained, and after the nail is pulled out, the sealant rapidly fills a gap of the pricking nail and does not leak air continuously.

    本申请涉及密封胶技术领域,具体而言涉及一种自愈合非硫化丁基密封胶的制备方法及其在轮胎中的应用。该密封胶的制备原料包括:丁基橡胶10‑30份、聚异丁烯20‑40份、苯乙烯‑异戊二烯‑苯乙烯10‑30份、聚α烯烃5‑30份、石油树脂5‑15份、抗氧剂1‑5份、着色剂1‑5份、橡胶填充油10‑20份,并通过以下方法制得:称取丁基橡胶等材料混合搅拌,加入部分聚异丁烯搅至均匀,再加入剩余聚异丁烯和聚α烯烃至均匀;加入橡胶填充油搅至均匀,抽真空至压力≥0.08MPa后出料即得。由本申请制得的密封胶在低温和高温下仍能保持正常使用,能够使轮胎在高速行驶时有足够的粘接力抵御轮胎旋转的离心力,同时扎钉不漏气,维持汽车的正常行驶,拔钉后密封胶迅速填充扎钉缝隙,不继续漏气。


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    Title :

    Preparation method of self-healing non-vulcanized butyl sealant and application of self-healing non-vulcanized butyl sealant in tires


    Additional title:

    一种自愈合非硫化丁基密封胶的制备方法及其在轮胎中的应用


    Contributors:
    WANG MINGJUN (author) / ZOU MINGXUAN (author) / WU HAITAO (author)

    Publication date :

    2025-02-25


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    C09J ADHESIVES , Klebstoffe / B60C VEHICLE TYRES , Fahrzeugreifen




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