A method for the production of polyamidoamine - epichlorohydrin - resins having a content of 1,3 - dichlorobenzene - 2 - propanol, the with the standard methods of gas chromatography is not detectable

摘要

Process for the production of resins polyamidoamine - epichlorohydrin to the content of dichloro - 1,3 - propanol - 2 undetectable by ordinary means of vapour phase chromatography. & br / & it consists in causing the products resulting from the condensation of polyamidoamines and of epichlorohydrin in succession on two columns of active charcoal. One thus obtains the aqueous resin without toxic products, particularly appreciated as additives for the wet strength in the manufacture of papers medical use, cosmetic or food contact.