Patent GB-417948-A (GB)
Title: Improvements in or relating to the dispersion of synthetic resins in liquids
IPC: G10K11/162
Filed: 1933-04-19
Abstract: Emulsions, preferably aqueous, of synthetic resins, obtainable in fusible, subsequently convertible into infusible forms, preferably phenol-formaldehyde type resins, are prepared by incorporating with the resins one or more stabilizers and saponified or saponifiable natural or sulphonated oils or fats, saponifying the oils or fats if not already saponified, and finally adding the dispersion medium. The products are applicable as paints, adhesives or binding or impregnating agents.  Syrupy or solid resins may be treated, the latter being first treated with heavy oil such as paraffin or colza oil.  The process may be rendered continuous by adding continuously to an already prepared emulsion a mixture of the resin with the emulsifying and stabilizing agents, and the dispersion medium, prepared emulsion being continuously drawn off.  Diluents, such as emulsified bitumen, rubber latex, hydrocarbon oils, waxes &c., fillers, such p  as colloidal clays, starch, wood pulp, metal powders, pigments, and plasticizers such as castor oil, may be added during or after the preparation.  Stabilizers employable include glue, casein, cyclohexanol, methyl cyclohexanol stearate.  Water may be included in the initial mixture in sufficient quantity to ensure saponification of the ingredients.  Syrupy resins may be preliminarily purified by dissolving in alkali and reprecipitating with acid.  Examples: 5 parts of sulphonated sperm oil, 5 parts of olein and 1 part of cyclohexanol are added with stirring to 45 parts of a solid phenol-formaldehyde resin heated with 5 parts of commercial liquid paraffin, and 4--9 parts of aqueous sodium hydroxide or 2--4 parts of aqueous triethanolamine added; after saponification is complete a concentrated solution containing 2,5 parts of glue followed by 45 parts of hot water are stirred in; (2) into a mixture of 20 parts of commerical oleic acid, 4--5 parts of triethanolamine, 5 parts of glue and 50 parts of boiling water, 100 parts of syrupy resin, purified or otherwise, are stirred; an equal volume of water is then gradually incorporated; (3) 1 per cent of casein, 1 per cent of ammonia, 3 per cent of methylcyclohexanol stearate, and 3 per cent of fatty acid are warmed together and 17 per cent of water added, followed by 40 per cent of powdered synthetic resin and, after heating and stirring, 35 per cent of water; (4) the procedure of (3) is followed, employing 2 per cent casein, 2 per cent ammonia, 3 per cent methylcyclohexanol stearate, 3 per cent fatty acid, 30 per cent of a urea resin product, and 60 per cent total water.ALSO:Emulsions, preferably aqueous, of synthetic resins obtainable in fusible subsequently convertible into infusible forms, preferably phenolformaldehyde type resins, are prepared by incorporating with the resins one or more stabilizers and saponified or saponifiable natural or sulphonated oils or fats, saponifying the oils or fats if not already saponified, and finally adding the dispersion medium.  The products are applicable as adhesives.  Syrupy or solid resins may be treated, the latter being first treated with heavy oil such as paraffin or colza oil. The process may be rendered continuous by adding continuously to an already prepared emulsion a mixture of the resin with the emulsifying and stabilizing agents, and the dispersion medium, prepared emulsion being continuously drawn off.  Diluents, such as emulsified bitumen, rubber latex, hydrocarbon oils, waxes &c., fillers, such as colloidal clays, starch, wood pulp, metal powders, pigments, and plasticizers such as castor oil, may be added during or after the preparation.  Stabilizers employable include glue, casein, cyclohexanol, methyl cyclohexanol stearate. Water may be included in the initial mixture in sufficient quantity to ensure saponification of the ingredients.  Syrupy resins may be preliminarily purified by dissolving in alkali and reprecipitating with acid.  Examples: (1) 5 parts of sulphonated sperm oil, 5 parts of olein and 1 part of cyclohexanol are added with stirring to 45 parts of a solid phenol-formaldehyde resin heated with 5 parts of commercial liquid paraffin, and 4-9 parts of aqueous sodium hydroxide or 2-4 parts of aqueous triethanolamine added; after saponification is complete a concentrated solution containing 2,5 parts of glue followed by 45 parts of hot water are stirred in; (2) into a mixture of 20 parts of commercial oleic acid, 4-5 parts of triethanolamine, 5 parts of glue and 50 parts of boiling water, 100 parts of syrupy resin, purified or otherwise, are stirred; an equal volume of water is then gradually incorporated; (3) 1 per cent of casein, 1 per cent of ammonia, 3 per cent of methylcyclohexanol stearate, and 3 per cent of fatty acid are warmed together and 17 per cent of water added, followed by 40 per cent of powdered synthetic resin and, after heating and stirring, 35 per cent of water; (4) the procedure of (3) is followed, employing 2 per cent casein, 2 per cent ammonia, 3 per cent methylcyclohexanol stearate, 3 per cent fatty acid, 30 per cent of a urea resin product, and 60 per cent total water.