Function: noun
Date: 1940
: any of a class of synthetic rubbers that are made by copolymerizing isobutylene with a small amount usually of isoprene at low temperature
Function: noun
Date: 1940
: any of a class of synthetic rubbers that are made by copolymerizing isobutylene with a small amount usually of isoprene at low temperature
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012