Process for Producing High Density Elastic Polyurethane Using a Combination of 4-Methyl-1-(2-Dimethylaminoethyl)Piperazine Together with Another Tertiary Amine Catalyst

Process for Producing High Density Elastic Polyurethane Using a Combination of 4-Methyl-1-(2-Dimethylaminoethyl)Piperazine Together with Another Tertiary Amine Catalyst - US Patent 4,638,016, 1987 .