This invention relates to the use of hexahydropyrimidines (HHP) as anti-oxidants for elastic materials such as rubber. The preferred hexahydropyrimidines contain at least one cycloalkylene or substituted cycloalkylene group and most preferably three cycloalkylene groups as illustrated by 2,2,4,4-dipentamethylene-5,6-tetramethylene hexahydropyrimidine.
本发明涉及将六氢
嘧啶(HHP)用作橡胶等弹性材料的
抗氧化剂。首选的六氢
嘧啶至少包含一个环烷基或取代环烷基基团,最好是三个环烷基基团,如2,2,4,4-二戊亚甲基-5,6-四亚甲基六氢
嘧啶所示。