FIELD: chemical industry.
SUBSTANCE: invention relates to a polymer composition based on polyisoolefin, having multimodal molecular mass distribution, which can be obtained by later adding a chain transfer agent to the polymerization process. This polymer composition has a low molecular fraction having peak molecular weight (Mp) of less than about 100,000 g/mol, and a high molecular fraction having peak molecular weight (Mp) of more than about 250,000 g/mol, wherein the low molecular fraction is present in the composition in the amount less than the high molecular fraction.
EFFECT: cured products obtained from this polymer composition based on polyisoolefin demonstrate improved processability, while maintaining physical properties.
25 cl, 13 dwg, 5 tbl
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