In 2012, mintage numbers were reduced by over 90%, in line with a similar reduction for the Presidential Dollars, due to large stockpiles of unused dollar coins.he coin was first suggested as a replacement for the Susan B. Anthony dollar, which proved useful for vending machine operators and mass transit systems despite being unpopular with the public.
Butyl rubber is a synthetic rubber, a copolymer of isobutylene with isoprene. The abbreviation IIR stands for isobutylene isoprene rubber. Polyisobutylene, also known as PIB or polyisobutene, (C 4 H 8) n, is the homopolymer of isobutylene, or 2-methyl-1-propene, on which butyl rubber is based.
Butyl carbitol is a slow-evaporating, hydrophilic glycol ether. It is primarily used as a solvent in coatings, inks, cleaners and specialty fluids. It is also used as a chemical intermediate to produce diethylene glycol monobutyl ether acetate and some herbicides, insecticides and plasticizers.It is also used in hydraulic brake fluid applications.t is primarily used as a solvent in coatings, inks, cleaners and specialty fluids. It is also used as a chemical intermediate to produce diethylene glycol monobutyl ether acetate and some herbicides, insecticides and plasticizers.