GB567063A - Improvements in branched chain guanamine-aldehyde condensation products - Google Patents

Abstract

Condensation products are prepared from formaldehyde or a polymer thereof and a guanamine having the general formula <FORM:0567063/IV/1> where R is a branched chain aliphatic radical containing at least 7 carbon atoms. The following derivatives of acetoguanamine are specified: ethyl-n-butyl; ethyl-iso-amyl; di-n-propyl; methyl-iso-amyl; methyl-n-hexyl; di-iso-butyl; n-amyl-n-heptyl; di-n-heptyl; di-n-octyl. b ,b -di-n-propyl propioguanamine is also mentioned. Mixtures of these may be used with one another, with other aminotriazines, e.g. melamine, with other substances which react with formaldehyde, e.g. urea, thiourea, dicyandiamide, aniline or phenol. Crude reaction mixtures obtained by reacting biguanide with an ester or acid halide of a branched chain aliphatic acid containing at least 8 carbon atoms may also be employed. The products may be alkylated, e.g. with ethanol, propanol, butanol, amyl alcohol, cyclohexanol, or benzyl alcohol. The products may be used for moulding or coating compositions. Coating compositions may also include cellulose derivatives, alkyd resins, or phenyl-aldehyde resins and plasticizers, e.g. dibutyl phthalate and tricresyl phosphate. The products may be used as aqueous syrups or emulsions, together, if desired, with starch, gum tragacanth, alginate casein, softening and wetting agents for crease-proofing, mat-finishing, water-proofing or glazing textiles, for finishing leather or for sizing or increasing the wet strength of paper. They may also be used for fixing dyes to fabrics, particularly those of cellulose or its derivatives, as binders for abrasives, as plywood adhesives, or in insecticidal or fungicidal compositions. Examples describe (1) the condensation of formaldehyde with ethyl-n-butyl acetoguanamine at 60-100 DEG C. in presence of alkali, and preparation of a moulding powder from the aqueous syrup formed by addition of wood pulp, zinc stearate and, if desired, phthalic acid or anhydride; (2) dehydration by azeotropic refluxing with butanol of the aqueous syrup prepared in example 1 and preparation of a lacquer from the product; (3) condensation at 70-90 DEG C. and pH 4-5 of formaldehyde with ethyl-iso-amylacetoguanamine and preparation of a laminated paper product therefrom; and (4) the condensation of formaldehyde and impure di-n-butyl acetoguanamine. According to the Provisional Specification, acetaldehyde, propionaldehyde, butyraldehyde, hexaldehyde, heptaldehyde, crotonic aldehyde, allyl aldehyde, benzaldehyde, cinnamyl aldehyde or furfural may be used in place of formaldehyde.