GB543096A - Improved resinous condensation products and methods of producing same - Google Patents

Abstract

543,096. Resinous condensation products ; proofing permeable materials. BRITISH THOMSON-HOUSTON CO., Ltd. Aug. 6, 1940, No. 12632. Convention date, Aug. 10, 1939. [Class 2 (iii)] [Also in Group VIII] Resinous condensation products are prepared by heating together an aliphatic aldehyde and a diamide of an unsaturated dicarboxylic acid containing a CH 2 =C # grouping and in which the carboxyl groups are attached to different carbon atoms. Specified diamides are itaconic diamide, methyl itaconic diamide and glutaric diamide, and the condensation may be carried out under acid, alkaline or neutral conditions. Inter-condensates may be produced by adding other aliphatic-aldehyde-reactable organic compounds capable of forming a methylol derivative as an intermediate during the resin formation, e.g. urea, phenols or acetone. The products may be used alone, or mixed with fillers, pigments, dyes or lubricants, as moulding compositions. The liquid condensates may be used in the production of paints, varnishes, lacquers or enamels, and as adhesives. The products may also be used as fire-retardants and water-repellents when applied to wood or to fabrics. Examples are given of the preparation of resinous condensates from itaconic diamide and formaldehyde, with or without phenol or urea. Curing catalysts may be incorporated with the condensates, or self-curing characteristics may be imparted to the resins by inter-condensing into the initial condensation products such substances as chloroacetamide, mono-chloroacetyl urea, chloroacetonitrile, chloral hydrate, chloroacetone, nitrourea, sodium nitrourea, methylene diamino monohydrochloride, aminoacetamide hydrochloride and diethanolamine hydrochloride. The resins of this invention may be modified by introducing before, during or after condensation, partially hydrolysed wood products, lignin, proteins, protein-aldehyde condensation products, phenol-aldehyde condensation products, aniline-aldehyde condensation products, furfural condensation products, alkyd resins, sulphonamide-aldehyde resins, water-soluble cellulose derivatives, natural gums and resins such as copal, shellac or rosin, polyvinyl compounds and super-polyamides. Specified optional additions to the condensation products are alpha cellulose flock, barium sulphate, zinc sulphide, titanium oxides, flaked aluminium or copper, stearates or palmitates of tin and zinc, and waxes such as carnauba and paraffin wax. An example is given of the preparation of a laminated article by dipping paper sheets into an acidified condensation syrup, drying at 80‹ C., superposing the sheets, and beating under pressure. Specifications 519,349 and 542,513 are referred to.