Patent GB-710171-A (GB)
Title: Printing processes using aminoaldehyde condensation products
Inventor: PIKE HERBERT
IPC: C09D11/10
Filed: 1949-08-26
Abstract: A printing ink comprises a composition of (1) a non-resinous etherified aminoplast partial condensate; (2) a non-aqueous liquid; (3) a non-corrosive acid curing catalyst; and (4) an amino compound which accelerates the hardening of the aminoplast by the curing catalyst.  Specified for (1) are the reaction products of one or more of (a) urea, thio-urea, guanidine, dicyandiamide, or melamine, or its hydrochloride or oxalate with one or more of (b) formaldehyde, acetaldehyde, paraformaldehyde, metaldehyde, trioxane, furfuraldehyde, glyoxal, chloral and its hydrate, propionaldehyde, butyraldehyde, benzaldehyde or salicylaldehyde etherified with one or more of (c) methyl, ethyl, propyl, butyl, tetrahydrofurfuryl, benzyl or allyl alcohols, cyclohexanone glyceride or its alkyl derivatives, ethylene glycol mono-2-ethyl butyl ether, pentaerythritol, 2-ethylhexane-1, 3-diol or octylene glycol.  The etherified aminoplast is made by reacting the alcohol with the methylol amino compound in presence of an acid catalyst and stopping the reaction by adding alkali.  Specified for (2) are tetrahydrofurfuryl alcohol, 2-ethylhexane-1, 3-diol, benzyl alcohol, paraffin fractions, xylol, diphenyl, chlorinated diphenyls, ketones, esters, ethers, acetals and ketols.  Specified for (3) are formic, tartaric, citric, acetic, phthalic, sulphanilic, lactic, salicylic, benzoic, anthranilic, oxalic, propionic butyric, succinic, oxalic, toluic, cinnamic, mandelic, oleic, ricinoleic and elaeostearic acids, or anhydrides, toluene sulphonic acids, naphthalene, naphthylamine or anthracene sulphonic or disulphonic acids; glycerol dichlorhydrin, potassium or ammonium dihydrogen phosphate, linseed oil fatty acids, rosin or acidic alkyd resins.  Specified for (d) are urea, hydroxylamine and its hydrochloride, phenyl hydrazine, ethyl and phenyl urea, aniline hydrochloride, urea hydrogen peroxide, naphthylamine hydro-chloride, guanidine sulphate, thiourea, melamine and its hydrochloride and dicyandiamide.  In examples (1) to a composition of benzyl alcohol, ethyl ether of dimethylol urea, long-oil modified alkyd resin, urea and barium lithol red is added a curing catalyst comprising tartaric acid, dimethyl phthalate, collophony, cobalt linoleate, liquid paraffin and aluminium stearate; (2) to a composition of benzyl alcohol, benzyl ether of dimethylol urea, melamine hydrochloride, long oil modified alkyd resin and prussian blue is added a curing catalyst comprising phthalic anhydride, tricresyl phaphate, rosin, blanc, fixe, liquid paraffin, aluminium stearate and cobalt linoleate; (3) to a composition of tetrahydrofurfuryl alcohol, diethyl ether of diethylol urea, diethyl phthalate, urea, long oil modified alkyd resin and bronze blue is added a curing catalyst, e.g. that of example (1); (4) to a composition of benzyl alcohol, triethyl ether of trimethylolmelamine, diethyl phthalate, ethyl urea, long oil modified alkyd resin and barium lithol red is added a curing catalyst, e.g. that of example (1).  Specification 710,172 is referred to.