The invention relates to the field of rubber, and discloses modified styrene-butadiene rubber, a rubber composition, vulcanized rubber and a preparation method and application thereof. The modified styrene-butadiene rubber is prepared by mixing styrene-butadiene rubber and a sulfydryl modifier as shown in a formula (1) and performing in-situ grafting modification, and the grafting rate of the sulfydryl modifier as shown in the formula (1) is 0.4-4 mol% based on the total molar weight of an ethylene structural unit in the styrene-butadiene rubber; by adopting the modified styrene-butadiene rubber, the dispersion of the white carbon black in the modified styrene-butadiene rubber can be greatly improved, so that the tensile strength of the vulcanized rubber can be improved, heat generation can be reduced, and the wet skid resistance of the vulcanized rubber can be further improved. Wherein R is alkylene with 1 to 5 carbon atoms.

    本发明涉及橡胶领域,公开了一种改性丁苯橡胶与橡胶组合物和硫化橡胶及其制备方法及应用。所述改性丁苯橡胶包括由丁苯橡胶和式(1)所示的巯基改性剂混炼通过原位接枝改性制得,且以所述丁苯橡胶中乙烯结构单元的总摩尔量计,所述式(1)所示的巯基改性剂的接枝率为0.4‑4mol%;本发明采用改性丁苯橡胶,能够较大程度的改善白炭黑在改性丁苯橡胶中的分散,从而能够提高硫化橡胶的拉伸强度,以及能够减少生热,进一步提高硫化橡胶的抗湿滑性能。其中,R为C1‑C5的亚烷基。


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    Title :

    Modified styrene-butadiene rubber, rubber composition, vulcanized rubber and preparation method and application of vulcanized rubber


    Additional title:

    改性丁苯橡胶与橡胶组合物和硫化橡胶及其制备方法及应用


    Contributors:
    SUN PAN (author) / LIU PING (author) / ZHAO QINGSONG (author)

    Publication date :

    2023-06-20


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    C08C TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS , Behandlung oder chemische Modifizierung von Kautschuken / B60C VEHICLE TYRES , Fahrzeugreifen / C08K Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe , USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS / C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen



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