TERMOPLASTIC ELASTOMERIC COMPOSITION AND PREPARATION METHOD THEREOF Russian patent published in 2010 - IPC C08L23/28 C08L77/00 

FIELD: chemistry.

SUBSTANCE: invention relates to a thermoplastic elastomeric composition and preparation method thereof and can be used as a fluid impermeable layer in pneumatic tyres and tubes. The composition contains a halogenated isobutylene-containing elastomer and a nylon resin, having melting point between 170°C and 230°C. Said elastomer in form of vulcanised or partially vulcanised particles through dynamic vulcanisation is contained in form of a dispersed phase in a continuous phase of nylon in amount greater than 60 vol. % of overall content of elastomer and resin. Said period of time for dynamic vulcanisation is equal to or less than the defined holding time of the mixer. The method involves steps for mixing the elastomer with a vulcanising system thereof with fractional addition thereof into the nylon resin. The step for dynamic vulcanisation of the fractionally added amount of elastomer in the presence of a vulcanised composition from the previous step is repeated several times necessary to obtain total amount of halogenated elastomer in the said composition.

EFFECT: invention enables to achieve excellent longevity and elasticity properties with excellent air-tightness.

20 cl, 1 dwg, 5 tbl