Patent GB-364068-A (GB)
Title: Manufacture of artificial masses for moulding
IPC: C08G12/40
Filed: 1930-06-23
Abstract: Artificial masses for moulding are manufactured by incorporating a condensation product of a metallic sulphocyanide and formaldehyde with a urea-aldehyde condensation product (the term "urea" including urea thiourea, their derivatives and metal compounds and their mixtures, and the term "aldehyde" including aliphatic aldehydes, thioaldehydes, sulphines and other sulphur-containing compounds derived from aldehydes, substances yielding aldehydes, unsaturated aldehydes, and mixtures thereof). The incorporation may take place by mixing the starting materials, by mixing condensation products independently prepared or by consecutively carrying out the condensations in the same vessel. The products, with which fillers may be incorporated, have better moulding properties than those from urea alone, and may be taken from the mould while still hot.  In examples:--(1) Urea, calcium sulphocyanide and formalin are heated together and the resulting solution evaporated, yielding a semi-solid mass which can be drawn into threads and which on heating with acid salts yields a mass which can be pulverized and used for moulding; the syrups take up fillers to produce moulded products; (2) urea, calcium sulphocyanide, and formaldehyde are boiled together yielding a syrup suitable for a fluidifying medium for plastic masses; (3) urea, aluminium sulphocyanide, and formalin are heated together, and alkali is added, producing a mucilaginous precipitate; (4) urea, calcium sulphocyanide, and formalin are heated together, the solution evaporated and a yellow resin precipitated by the addition of acid salts; (5) thiourea, calcium sulphocyanide, and formalin are heated above 100 DEG  C. and the product precipitated with acids; (6) urea, potassium sulphocyanide, and formalin are boiled, yielding masses resembling ivory nuts; (7) the product of (1) is treated with ammonium sulphide; (8) urea, potassium sulphocyanide, formalin, and ammonium sulphide are boiled to produce a transparent gelatine-like mass; the ammonium sulphide may be replaced by solutions of phosphorus sulphide in ammonia, or by other sulphur compounds; (9) urea, calcium sulphocyanide and formaldehyde are kept for several days at a temperature not exceeding 35 DEG  C. producing a liquid intermingled with crystals which can take up powdered fillers or may be dried to yield a moulding powder; (10) calcium sulphocyanide and formaldehyde are heated until the reaction commences, and urea is then added; the product is a clear syrup yielding a yellow jelly with acid salts; (11) calcium sulphocyanide and formalin are boiled and after completion of the reaction urea is added and the mixture further heated, producing a colourless jelly; (12) 1 part of a powdered urea-aldehyde condensation product is mixed with 0,5 part of a sulphocyanide-aldehyde condensation product; (13) ammonium sulphocyanide is heated with formalin until a yellowish resin separates, and urea is then added and the mixture warmed; the liquid can be evaporated to syrup which is converted by acids or acid substances into a clear gelatinous product; the ammonium sulphocyanide may be mixed with potassium, sodium or calcium sulphocyanide; (14) urea, ammonium sulphocyanide, and formalin are heated together with the addition of ammonia, yielding a slightly turbid liquid which cools to an ointment-like mass.  Iron sulphocyanide is also specified as suitable.ALSO:Moulding compositions are manufactured by mixing a condensation product of a metallic sulphocyanide and formaldehyde with a urea-aldehyde condensation product (the term "urea" including urea, thiourea, their derivatives, and metal compounds and their mixtures, and the term "aldehyde" including aliphatic aldehydes, thioaldehydes, sulphines and other sulphur-containing compounds derived from aldehydes, substances yielding aldehydes, unsaturated aldehydes, and mixtures thereof).  The products, with which fillers may be incorporated, have better moulding properties than urea-aldehyde products alone, and may be taken from the mould while still hot.  In an example, 1 part of a powdered urea-aldehyde condensation product is mixed with 0,5 part of a sulphocyanidealdehyde condensation product.  Sulphocyanides specified are those of calcium, potassium, aluminium, and iron.