Patent GB-784502-A (GB)
Title: Improved process for producing shaped bodies
IPC: C09J4/00
Filed: 1953-06-12
Abstract: An adhesive composition, for bonding porous construction elements liable to attack by biologically destructive agencies, comprises a solution or dispersion of a synthetic condensation resin adhesive in water in which is dispersed from 0.5 to 50 per cent by weight of total glue dispersion of a water-insoluble liquid pesticide or mixture of such pesticides and to which has been added a de-emulsifying agent sufficient, with the application of heat if necessary, to break the dispersion of the pesticide between the surfaces to be bonded.  Pesticides specified are chlorinated diphenyl, chlorinated terphenyl, chlorinated paraffins of 10 to 20 carbon atoms and having 10 to 70 per cent of chlorine, o- and p-hydroxydiphenyls, p-chlorometacresol, pentachlorophenol, naphthols, p-nitrophenylthiophosphoric acid diethylester, dichlorodiphenyl trichloroethane and g -hexachlorocyclohexane.  Resin adhesives specified are urea-, phenol- and melamine-aldehyde condensation products.  The dispersions may be stabilized prior to the action of the de-emulsifier by addition of known emulsifying agents or stabilizers.  De-emulsifiers specified are strong electrolytes e.g. potassium nitrate; gas producing compounds, e.g. ammonium carbonate, bicarbonate and nitrate, guanidine carbonate and diazobutyric acid nitrile; amines, e.g. isohexylamine, triethylamine, mono- and di-ethylaminocyclohexanes, dimethyl aniline and hydrazine hydrate; the di-ethylaminocyclohexane salt of diiso-butylnaphthalene sulphonic acid; and finely divided inorganic fillers, e.g. crushed stone, silica, zinc oxide, iron oxide and fuller's earth.  The amounts of de-emulsifiers used vary between 0.1 to 30 per cent by weight of the pesticide or more in the case of fillers and strong electrolytes-strong electrolytes are excluded from compositions containing synthetic resins which are hardenable by these electrolytes.  In Example (1) an aqueous solution of a urea-formaldehyde condensate is emulsified with an emulsifier, hexahydro-N-diethylaniline (as latent de-emulsifier) and a mixture of different pesticides; immediately before gluing, a hardening catalyst solution is added thereto.  Examples (2) to (5), (7), (8), (10), (11), (13) and (14) also disclose adhesives containing urea-formaldehyde condensates with various pesticides and de-emulsifiers and Example (6) discloses an adhesive containing a melamine-formaldehyde condensate.ALSO:An adhesive composition for bonding porous construction elements liable to attack by biologically destructive agencies, comprises a solution or dispersion of a natural glue (e.g. casein, gelatine or dextrin) in water in which is dispersed from 0,5 to 50 per cent by weight of the total glue dispersion of a water-insoluble liquid pesticide or mixture of such pesticides and to which has been added a de-emulsifying agent sufficient, with the application of heat if necessary, to break the dispersion of the pesticide between the surfaces to be bonded. Pesticides specified are chlorinated diphenyl, terphenyl and paraffins having from 10 to 20 carbon atoms and 10 to 70 per cent of chlorine; o- and p-hydroxy-diphenyls, p-chlorometacresol, pentachlorophenol, naphthols, p-nitro-phenyl-thiophosphoric acid di-ethylester, di-chlorodiphenyltrichloroethane and g -hexachlorocyclohexane.  The dispersions may be stabilized prior to the action of the de-emulsifier by addition of known emulsifying agents or stabilisers.  De-emulsifiers specified are strong electrolytes, e.g. potassium-nitrate; gas producing compounds, e.g. ammonium carbonate, bicarbonate and nitrate, guanidine carbonate and diazobutyric acid nitrite; amines, e.g., isohexylamine, triethylamine, mono- and di-ethylaminocyclohexanes, dimethylaniline and hydrazine hydrate; the diethylaminocyclohexane salt of di-iso-butylnaphthalene sulphonic acid: and finely divided inorganic fillers, e.g. crushed stone, silica, zinc oxide, iron oxide and Fuller's earth. The amounts of de-emulsifiers used vary between 0,1 to 30 per cent by weight of the pesticide or more in the case of fillers and strong electrolytes.  In examples, (9) a dispersion of montan wax in water and ammonia is mixed with an aqueous ammoniacal casein solution containing sodium azide, and the resulting dispersion is mixed with an oily fungicide containing chlorinated diphenyl, chlorinated aliphatic petroleum hydrocarbons, pentachlorophenol and p-N. nitrophenylthiophosphoric acid diethyl ester, and then with ammonium bicarbonate; and (12), the glue preparation of (9) is mixed with further water, the sodium salt of di-isobutylnaphthalene sulphonic acid and an oily mixture of chlorinated terphenyl, chlorinated aliphatic petroleum hydrocarbons, hexachlorocyclohexane, o-chloronaphthalene and o-diphenyl-hydroxide, and then with dimethylaminocyclohexane, silica and an oil-soluble dye.