Polyetheramine D-400 is a diamine based on a copolymer backbone with an average molecular weight of approximately 400, with the amino group located on the second carbon atom at the end of the polyether.
Polyetheramine D-2000 is a diamine based on a copolymer backbone with an average molecular weight of approximately 2000. And its amino group located on the second carbon atom at the end of the polyether.