1.Awo ntoatoaso a edi kan a ɛyɛ rɔba aboafo .
[1839 ~ 1904] Wɔ saa bere yi mu no, rɔba aboafo nneɛma no gyina hɔ ma inorganic vulcanization promoters. rɔba adwuma no ahyɛ ase bere a inorganic vulcanization promoters, nanso ɛsan nso wɔ ɔhaw ahorow te sɛ low efficiency of promotion ne poor vulcanization performance.
Wɔ afe 1839 mu no, wohuu vulcanization.
Wɔ 1844 mu no, wohuu sulfide a ɛma nneɛma kɔ ntɛmntɛm a ɛnyɛ nkwaboaa a ɛnyɛ nkwaboaa a ɛyɛ mmerɛw a wɔde di dwuma titiriw.
Wɔ 1846 mu no, nneɛma a wɔde yɛ ahuru a wohuu, sulfur chloride a ɛyɛ nwini vulcanization kwan.
Wɔ afe 1904 mu no, wohui sɛ wobetumi de carbon black adi dwuma wɔ rɔba.
2.Awo ntoatoaso a ɛto so abiɛsa a ɛyɛ rɔba aboafo .
[1980~present] Nneɛma titiriw a ɛwɔ rɔba a wɔde ka ho wɔ saa gyinabea yi mu ne nneɛma a atwa yɛn ho ahyia ho banbɔ ne dwumadi ahorow pii.
Wɔ 1980 ~ 1981 mu no, wɔyɛɛ promoter NS no.
Wɔ afe 1985 mu no, wɔde nneɛma a atwa yɛn ho ahyia ho banbɔ ho promoter MTT bae.
Efi 1991, nneɛma a atwa yɛn ho ahyia ho banbɔ a ɛnyɛ nitrosamine promoters, sulfonamides, zinc nkyene promoters, sulfides, anticoke promoters ne afoforo promoters ayɛ na wɔde adi dwuma nnidiso nnidiso{2}} ZBPD, TBSI, CBBS, TBZTD, tibtd, zdibc, zbecs, zbecs, apurs INVENED