GB546756A - Improvements in synthetic resinous compositions - Google Patents

Abstract

546,756. Synthetic resins ; proofing permeable materials. BRITISH THOMSON-HOUSTON CO., Ltd. Feb. 10, 1941, No. 1734. Convention date, Feb. 14, 1940. [Class 2 (iii)] [Also in Group VIII] A synthetic resin is prepared by intercondensing maleic diamide, an aliphatic aldehyde, and at least one aliphatic aldehydereactable organic compound capable of forming a methylol derivative as an intermediate during the resin formation. Condensation between the reactants may be carried out under acid, alkaline or neutral conditions, at normal or elevated temperatures, and in the presence or absence of a catalyst, though the reaction is preferably initiated at a pH above 7.0, and completed at a pH below 7.0. Specified aliphatic aldehydes which may be used are:- formaldehyde, paraformaldehyde, hexamethylene-tetramine, acetaldehyde, propionaldehyde, butyraldehyde, acrolein, methacrolein and crotonaldehyde. Specified aldehyde-reactable organic compounds are urea, methyl urea, acetyl urea, benzoyl urea, phenyl thiourea, asymmetrical diethyl urea, allyl urea, 2-chloroallyl urea, ethylidene urea, methylol urea, methylene urea, guanidine, dicyandiamide, guanyl urea, guanyl thiourea, biguanidine, aminoguanidine, aminotriazole, creatine, creatinine, guanoline, ethylene pseudosulphocarbamide derivatives, sulphohydantoin, triazine derivatives, phenol, o-, m- and p-chlorphenol, m-nitrophenol, p, p'-dihydroxydiphenyl propane, catechol, resorcinol, the xylenols, methylphenol, p-tertiary butyl phenol, p-tertiary amyl phenol, the o-, m- and p-phenyl phenols, the o-, m- and p-benzyl phenols, phenyl phenol ethane, substituted butyl phenols, indene phenols, coumar phenols, ethyl hexyl phenols, terpene phenols, symmetrical phenyl phenol alkanes, styryl phenols, the nuclearly alkylated or nuclearly phenylated phenyl phenol alkanes, ethyl, propyl, isopropyl, butyl and amyl alcohols, ethylene glycol, diethylene glycol, glycerine, pentaerythritol, trimethylol nitromethane, formamide, acetamide, stearamide, acrylic acid amides, benzamide, toluene sulphonamide, ethylene diamine, aniline, phenylene diamine and amino alcohols. Examples are given. The resinous intercondensates may be rendered self-curing, by incorporating therein a curing catalyst such as phthalic acid, hydrochloric acid, sodium chloroacetate or diethyl chloroacetamide, or by intercondensing therewith components such as chloroacetamide, mono-chloroacetyl urea, chloroacetonitrile, chloral hydrate, chloroacetone, nitrourea, sodium nitrourea, methylene diamine monohydrochloride, aminoacetamide hydrochloride, or diethanolamine hydrochloride. The resins may be modified by introducing before, during or after condensation, lignin, proteins, partially hydrolysed wood products, protein-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 and rosin, and polyvinyl compounds such as polyvinyl alcohol, polyvinyl acetate and polyvinyl acetals. Specified materials which may be incorporated into the resins are dyes, pigments, barium sulphate, zinc sulphide, titanium compounds such as its oxides, flaked aluminium or copper, mould lubricants such as the stearates and palmitates of tin or zinc, waxes such as carnauba and paraffin waxes, wood flour, alpha cellulose, paper, cloth, canvas, asbestos, mica, wood chips or fibres, and glass fibres. The resins may be used in the preparation of moulding compositions, paints, varnishes, laquers, enamels and adhesives, and as fire retardants, water repellents and sizings when applied to wood, or to silk, cotton or wool in filament, thread, fabric or other form. They may also be used to bond together superimposed layers of cloth or paper, in the manufacture of laminated fibrous sheet material. Specifications 519,349, 542,513, 542,932, 542,933, 942,934, 542,972, 542,973, 542,974 and 543,096 are referred to.