Patent GB-540198-A (GB)
Title: Improvements in synthetic resinous compositions
IPC: C08K5/19
Filed: 1940-07-30
Abstract: 540,198. Synthetic resinous compositions. BRITISH THOMSON-HOUSTON CO., Ltd. July 30, 1940, No. 12331. Convention date, Aug. 2, 1939. [Class 2 (iii)] A resinous composition comprises a soluble fusible aminoplast having incorporated therein an amino-ester salt which serves as an accelerator of curing and which may also serve as a plastizicer. Specified amino-ester salts are the hydrochloric, hydrobromic, hydroidic, hydrofluoric, sulphuric, nitric, phosphoric, oxalic, malonic, succinic, adipic, formic, acetic, propionic, furoic, citric, tartaric, itaconic, maleic, citraconic, acrylic and methacrylic acid salts of esters of glycine, alanine, α-amino butyric acid, valine, α-amino valeric acid, glycolencine, leucine, isolencine, serine, cysteine, cystine, ethyl methyl α-amino propionic acid, aspartic acid, glutamic acid, tyrosine, phenyl alanine, tryptophane, proline, histidene, oxyproline, arginine, lysine, o, m, and p-amino benzoic acids, and #-amino propionic acid, with methyl, ethyl propyl, butyl, amyl, hexyl, octyl, nonyl, decyl, undecyl, dodecyl, octadecyl, benzyl, cyclohexyl, and phenyl ethylalcohols, or with ethylene glycol, diethylene glycol or glycerine. The amino-ester salt may be introduced at any stage in the preparation of the composition, and generally only a small amount is used, e.g. up to 1/10 mol. of such salt per mol. of urea substance. Specified aldehydic components which may be used in the preparation of the aminoplast are formaldehyde, paraformaldehyde, hexamethylenetatramine, acetaldehyde, propionaldehyde, butyraldehyde, acrolein, methacrolein, crotonaldehyde and mixtures thereof, and these may be condensed with urea substances such as urea itself, thiourea, methylurea, acetyl urea, benzoyl urea, phenyl thiourea, asymmetrical diethyl urea, allyl urea, 2-chloroallyl urea, ethylidene urea, methylol urea, methylene urea, guanidine, dicyandiamide, guanylurea, guanylthiourea, biguanidine, aminoguanidine, aminotriazole, creatine, creatinine, guanoline, ethylene pseudosulphocarbamide derivatives, sulphohydantoin and triazine derivatives. The aminoplasts may be modified by introducing before, during or after condensation, alcohols such as ethyl, propyl, isopropyl, butyl, and amyl alcohol, ethylene glycol, diethylene glycol, glycerol, pentaerythritol, tri-methylol nitro methane, mono- or polyamides, amines, phenols, aminophenols, ketones, lignin, partially hydrolysed wood products, proteins, protein-aldehyde condensation products, phenol-aldehyde condensation products, polyhydric alcohol-polybasic acid condensation products, natural gums and resins. Dyes, pigments, plasticizers, mould lubricants, opacifiers and various fillers may be added. The compositions may be used in the production of moulding compositions, in making paints, enamels and varnishes, in making arc-extinguishing tubes, as bonding materials in the production of laminated materials, as anticreasing agents and as impregnants for electrical coils. Examples are given of compositions comprising urea-formaldehyde condensation products and glycine ethyl ester hydrochloride, with or without alpha cellulose flock and zinc stearate.