Term Name:	poly(isobutylene)
Synonyms:	2-Methylpropene polymer, butyl rubber, Isobutene polymer, Isobutylene polymer, PIB, poly(1,1-dimethylethylene), Poly(2-methyl-1-propene), poly(2-methylpropene), Polyisobutene
Definition:	A polymer composed of repeating 1,1-dimethylethylene units.
Ontology:	ChEBI [CHEBI:53725]  ( EBI )