Patent GB-640563-A (GB)
Title: Improvements in or relating to emulsifying and cleaning agents
IPC: C08G12/00
Filed: 1946-10-01
Abstract: Urea-aldehyde condensates suitable for use in the production of emulsifying and cleaning agents and in dentifrices, are obtained by condensation of urea and hexamethylenetetramine in molar proportions of from 3/1 mol. to 10/1 mol. at temperatures above 100 DEG  C.  The hexamethylenetetramine may be produced in situ by reacting the urea with a solution of ammonia and formaldehyde. The product has no definite m.p., but softens about 70 DEG  C. and dissolved in 30 per cent water gives a stable viscous solution of approximately the viscosity of glycerine for which it provides a suitable substitute. Fillers-chalk, magnesium carbonate-may be added to give a soap-like plastic which may be cut and moulded. The product may be used to emulsify waxes, oils and fats, the emulsion diluted with e.g. cellulose methyl ether, gelatin, glue, giving creams suitable as furniture &c. polishes.  In examples: (1) 18 parts urea and 11 parts hexamethylenetetramine are melted at 140 DEG  C.; the molten product is cooled to 70 DEG  C. and diluted with 6 parts water and filtered. A hygroscopic product emulsifying fats, oils and waxes is obtained. (2) 24 parts urea are mixed with 60 parts 30 per cent ammonia and 24 parts 40 per cent formaldehyde added.  The hot product is cooled and concentrated to a boiling point of 108 DEG  C.  (3) As in (1), the proportions of reactants being 45 urea, 23 hexa and 10 parts water. (4) As in (3), employing 100 parts urea dissolved in 22 parts water and 33 parts hexamethylenetetramine.  The product is cast in moulds and cut into pieces.  (5) The product obtained in example (1) is melted and mixed with 5 parts "Kalunite" wetting agent and 4 parts CaCO2 (7) 40 parts of the product is mixed with 10 parts synthetic wax and the mixture diluted with a 4 per cent solution of cellulose methyl ether.  (8) 30 parts of the product obtained in (3) are diluted with 30 per cent water and then mixed with 46 parts CaCO2, 3 parts lauryl sulphonate, 0.8 parts perfume, 0.05 parts menthol and 0.05 parts red lacquer.ALSO:Urea-aldehyde condensates suitable for use in the production of emulsifying and cleaning agents and in dentifrices are obtained by condensation of urea and hexamethylenetetramine in molar proportions of from 3/1 mol. to 10/1 mol. at temperatures above 100 DEG  C.  The hexamethylenetetramine may be produced in situ by reacting the urea with a solution of ammonia and formaldehyde.  The product has no definite m.p. but softens about 70 DEG  C. and dissolved in 30 per cent water gives a stable viscous solution of approximately the viscosity of glycerine for which it provides a suitable substitute.  Fillers-chalk, magnesium carbonate-may be added to give a soap-like plastic which may be cut and moulded.  The product may be used to emulsify waxes, oils and fats, the emulsion diluted with e.g. cellulose methyl ether, gelatin, glue, giving creams suitable as furniture &c. polishes.  In examples: (1) 18 parts urea and 11 parts hexamethylenetetramine are melted at 140 DEG  C., the molten products are cooled to 70 DEG  C. and diluted with 6 parts water and filtered. A hygroscopic product emulsifying fats, oils and waxes is obtained.  (2) 24 parts urea are mixed with 60 parts 30 per cent ammonia and 24 parts 40 per cent formaldehyde added.  The hot product is cooled and concentrated to a boiling point of 108 DEG  C. (3) As in (1), the proportions of reactants being 45 urea, 23 hexa and 10 parts water.  (4) As in (3), employing 100 parts urea dissolved in 22 parts water and 33 parts hexamethylenetetramine. The product is cast in moulds and cut into pieces.  (5) The product obtained in example (1) is melted and mixed with 5 parts "Kalunite" wetting agent and 4 parts CaCO3.  (7) 40 parts of the products are mixed with 10 parts synthetic wax and the mixture diluted with a 4 per cent solution of cellulose methyl ether. (8) 30 parts of the product obtained in (3) are diluted with 30 per cent water and then mixed with 46 parts CaCO3, 3 parts lauryl sulphonate, 0.8 parts perfume, 0.05 parts menthol and 0.05 parts red lacquer.