Patent GB-645023-A (GB)
Title: New stable emulsions of artificial resins and processes for making them
IPC: C08J3/07
Filed: 1947-11-11
Abstract: Stable aqueous emulsions of water insoluble heat hardenable amido-alcohol-formaldehyde condensates are obtained by dissolving the condensate in an organic solvent immiscible with water and emulsifying the solution by addition of a solution containing one or more proteins and also urea, thiourea, or mixture thereof. These are specified as amido compounds-urea, thiourea, guanidine, biuret, dicyandiamide; as water insoluble alcohols-butyl, amyl, hexyl, benzyl alcohols; as proteins-acid casein particularly prepared as described in Specification 597,390, fish glue, gelatine.  The solution of protein and hydrotropic amide usually includes a basic substance such as sodium or potassium hydroxide, ammonia, sodium carbonate, borax, trisodium phosphate, triethanolamine, or cyclohexylamine.  Other suitable additions are biuret, further emulsifying agents, softeners, anti-foaming agents, wetting agents, fillers, water repellants, such as paraffin wax, pigments, and hardeners, e.g. ammonium thiocyanate, tartaric acid diethyl ester.  Suitable organic solvents are benzene, sangajol, xylene, chlorobenzene, or tetralin, or preferably an alcohol used in preparing the condensate.  The emulsion is formed by slowly adding the organic phase to the agitated aqueous phase. Examples describe the emulsification of (1) a butanol solution of a urea-formaldehyde-butanol resin in an aqueous solution of casein and urea; (2) a hexyl and octyl alcohol solution of a urea-formaldehyde resin etherified with a hexyl and octyl alcohol mixture in an aqueous solution of casein, thiourea, and triethanolamine; (3) a butanol solution of a melamine formaldehyde resin etherified with butyl alcohol in an aqueous solution of urea, casein, caustic soda, ammonium thiocyanate and sodium lauryl sulphate; (4) a cyclohexanol solution of urea-formaldehyde resin etherified with cyclohexanol in an aqueous solution of fish glue, and urea.  The emulsions are used as adhesive, and impregnating agents for textiles.  Specifications 525,190, 543,860 and 544,157 are referred to.ALSO:Stable aqueous emulsions of water insoluble heat hardenable amido-alcohol-formaldehyde condensates are obtained by dissolving the condensate in an organic solvent immiscible with water and emulsifying the solution by addition of a solution containing one or more proteins and also urea, thiourea, or mixture thereof. These are specified as amido compounds-urea, thiourea, guanidine, biuret, dicyandiamide; as water insoluble alcohols-butyl, amyl, hexyl, benzyl alcohols; as proteins-acid casein, particularly prepared as described in Specification 597,390, fish glue, gelatine.  The solution of protein and hydrotropic amide usually includes a basic substance such as sodium or potassium hydroxide, ammonia, sodium carbonate, borax, trisodium phosphate triethanolamine, or cyclohexylamine.  Other suitable additions are biuret dicyandiamide, further emulsifying agents, softeners, anti-foaming agents, wetting agents, fillers, water repellants such as paraffin wax, pigments, and hardeners, e.g. ammonium thicyanate, tartaric acid diethyl ester.  Suitable organic solvents are benzene, sangajol, xylene, chlorobenzene, or tetralin, or preferably an alcohol used in preparing the condensate.  The emulsion is formed by slowly adding the organic phase to the agitated aqueous phase.  Examples describe the emulsification of (1) a butanol solution of a urea-formaldehyde-butanol resin in an aqueous solution of casein and urea; (2) a hexyl and octyl alcohol solution of a urea-formaldehyde resin etherified with a hexyl and octyl alcohol mixture in an aqueous solution of casein, thiourea, and triethanolamine; (3) a butanol solution of a melamine formaldehyde resin etherified with butyl alcohol in an aqueous solution of urea, casein, caustic soda, ammonium thiocyanate and sodium lauryl sulphate; a cyclohexanol solution of urea-formaldehyde resin etherified with cyclohexanol in an aqueous solution of fish glue, and urea.  The emulsions may be used as impregnating agents for textiles, and by adding a pigment, delustred or fast colour effects may be produced on textiles.  Specifications 525,190, 543,860 and 544,157 also are referred to.ALSO:Stable aqueous emulsions of water insoluble heat hardenable amido-alcohol-formaldehyde condensates are obtained by dissolving the condensate in an organic solvent immiscible with water and emulsifying the solution by addition of a solution containing one or more proteins and also urea, thiourea, or mixture thereof. They are specified as amido compounds-urea, thiourea, guanidine, biuret, dicyandiamide; as water insoluble alcohols-butyl, amyl, hexyl, benzyl alcohols; as proteins-acid casein, particularly prepared as described in Specification 597,390, [Group IV], fish glue, gelatine.  The solution of protein and hydrotropic amide usually includes a basic substance such as sodium or potassium hydroxide, ammonia, sodium carbonate, borax, trisodium phosphate, triethanolamine, or cyclohexylamine.  Other suitable additions are biuret, further emulsifying agents, softeners, anti-foaming agents, wetting agents, fillers, water repellants such as paraffin wax, pigments, and hardeners, e.g. ammonium thioyanate, tartaric acid diethyl ester.  Suitable organic solvents are benzene, sangajol, xylene, chlorobenzene, or tetralin, or preferably an alcohol as used in preparing the condensate.  The emulsion is formed by slowly adding the organic phase to the agitated aqueous phase.  Examples describe the emulsification of (1) a butanol solution of a urea-formaldehydebutanol resin in an aqueous solution of casein and urea; (2) a hexyl and octyl alcohol solution of a urea-formaldehyde resin etherified with a hexyl and octyl alcohol mixture in an aqueous solution of casein, thiourea, and triethanolamine; (3) a butanol solution of a melamine formaldehyde resin etherified with butyl alcohol in an aqueous solution of urea, casein, caustic soda, ammonium thiocyanate and sodium lauryl sulphate; (4) a cyclohexanol solution of urea-formaldehyde resin etherified with cyclohexanol in an aqueous solution of fish glue, and urea.  The emulsions are used as adhesives and impregnating agents for textiles.  Specifications 525,190, 543,860, [Group IV], and 544,157 are referred to.