6FLOYD D E. Polyamides of improved solubility from polyalkylene polyamines, hydroxy monocarboxylic acid, and hydrocarbon polymeric fatty acids : US. 3224893 [ P]. 1965-12-21.
7WILSON A F. Polyamide resins having solubility and resistance to geUing in alcohol solutions:US ,3420789 [ P ]. 1969-01-07.
8DRAWERT M. Synthetic polyamides of a dimeric fatty acid, a lower aliphatic carboxylic acid ethylene diamine, and a co-diamine:US,3622604 [P]. 1971-11-23.
9LEOB M L. Polyamide resins and method for manufacture:US,4072641 [ P]. 1978-02-07.
10JOSEPH S H, STURWOLD R. Polyamides exhibiting improved freeze-thaw characteristics in printing ink compositions: US, 3700618 [ P ]. 1974-10-24.