Polycationic polymer preparations - useful for (pre)treatment of hydrophobic substrates such as organic high polymers, glass and metals

摘要

A water-dilutable prepn. (I) is claimed, contg. (a) a heat-fixable polycationic polymer which forms at least colloidal solns. in water, contg. basic amino or imino gp(s). with N-bonded H atom(s) or an acid adduct thereof, and (b) a water-soluble lactam. Also claimed is a process for (pre)treating (II), by applying (I) to the substrate and heating. Also claimed is the use of such treated substrates as substrates for further processing, pref. dyeing with anionic or nonionic dyes, esp. with direct dye(s), using a polycationic fixing agent (k) contg. (k1) a soluble cationic polymer consisting of polymer (a1) (see below), pref. precondensed with (a6) a resin-forming opt. etherated N-methylol cpd. (pref. a N-methylol deriv. of an opt. cyclic urea) and (k2) a resin-formed, opt. etherated N-methylol cpd. with methylol-linked basic N atom(s) (pref. opt. etherated tri- to hexa-methylolmelamine) or an acid adduct thereof; the fixing process is carried out under acid conditions at at least 80 deg.C., pref. using a catalyst for crosslinking when using N-methylol cpds.. Also claimed are substrates treated by this process. The invention enables "difficult" substrates (esp. glass, metal, aramid fibre etc.) to be treated, esp. dyed and then fixed to give intense, fast colours; fibres treated with (I) are less prone to disintegration or to prodn. of dust during processing, and have improved dimensional stability. USE/ADVANTAGE - Used as a (pre)treatment agent, esp. for organic high polymers, glass and metals (II) (claimed).t a