Since excess vulcanisation reagents used in the sulphur prevulcanisation of the NR latex were believed to remain in the aqueous phase, the vulcanised latex was, therefore, centrifuged three times to eliminate the residue of these reagents.
Since excess vulcanisation reagents used in the sulphurprevulcanisation of the NR latex were believed to remainin the aqueous phase, the vulcanised latex was,therefore, centrifuged three times to eliminate theresidue of these reagents.