Patent GB-810338-A (GB)
Title: Blood glue and process of making the same
Inventor: CONE CHARLES NEWTON
IPC: C09J189/00
Filed: 1957-04-15
Abstract: Blood glue (see Group V) is mixed at below 120 DEG  F. with an alkaline adhesive conditioner to render the dispersion alkaline. The alkaline adhesive conditioner may consist of caustic alkali alone or it may comprise a mixture of alkali metal caustic, e.g. caustic soda, lime and sodium silicate; it may include also a thermosetting phenolaldehyde resin, e.g. the condensation products of phenol, the cresols or resorcinol with formaldehyde, or of phenol with furfural. The ratio of blood solids (calculated as soluble dried blood) to water in the aqueous blood material is from 1 : 3 to 1 : 10 and the preferred proportions, in parts by weight, of other ingredients in the glue based on 100 parts by weight of soluble dried blood, are caustic alkali 1-50, lime 1-50, sodium silicate 10-400 and resin 10-1000.  Anti-foaming agents, e.g. pine oil 1-10 parts and fillers, e.g. wood flour 5-100 parts or walnut-shell flour may also be incorporated.  Uses.-Plywood glue.ALSO:Blood glue is made by simultaneously coagulating and agitating an aqueous blood material consisting of fresh blood or an aqueous solution of soluble dried blood, or mixtures thereof, to obtain an aqueous dispersion of finely-divided coagulated blood particles which is then mixed at below 120 DEG  F. with an alkaline adhesive conditioner to render the dispersion alkaline.  Coagulation is effected by heating the aqueous blood material to between 120 DEG  F. and its boiling point, preferably between 130 DEG  and 160 DEG  F., and afterwards cooling it to below 120 DEG  F. before mixing with the adhesive conditioner. Alternatively, hot water or a chemical blood-coagulating agent can be used, e.g. various specified mineral and organic acids, and salts having acid reaction in water.  These agents can be employed in conjunction with mild heating, e.g. at 80 DEG  to 120 DEG  F.  The alkaline adhesive conditioner may consist of caustic alkali alone or it may comprise a mixture of alkali metal caustic, e.g. caustic soda, lime, and sodium silicate; it may include also a thermosetting phenolaldehyde resin, e.g. the condensation products of phenol, the cresols and resorcinol with formaldehyde, and of phenol with furfural.  The ratio of blood solids (calculated as soluble dried blood) to water in the aqueous blood material is from 1:3 to 1:10 and the preferred proportions, in parts by weight, of other ingredients in the glue based on 100 parts by weight of soluble dried blood, are caustic alkali 1-50, lime 1-50, sodium silicate 10-400 and resin 10-1000.  Anti-foaming agents, e.g. pine oil 1-10 parts, and fillers, e.g. wood flour, 5-100 parts, or walnut shell flour may also be incorporated.ALSO:Blood glue is made by simultaneously coagulating and agitating an aqueous blood material consisting of fresh blood or an aqueous solution of soluable dried blood, or mixtures thereof, to obtain an aqueous dispersion of finely-divided coagulated blood particles which is then mixed at below 120 DEG F. with an alkaline adhesive conditioner to render the dispersion alkaline.  Coagulation is effected by heating the aqueous blood material to between 120 DEG F. and its boiling point, preferably between 130 DEG F. and 160 DEG F., and afterwards cooling it to below 120 DEG F. before mixing with the adhesive conditioner.  Alternatively, hot water or a chemical blood-coagulating agent can be used, e.g. various specified mineral and organic acids, and salts having acid reaction in water.  These agents can be employed in conjunction with mild heating, e.g. at 80 DEG F. to 120 DEG F.  The alkaline adhesive conditioner may consist of caustic alkali alone or it may comprise a mixture of alkali metal caustic, e.g. caustic soda, lime, and sodium silicate; it may include also a thermosetting phenol-aldehyde resin, e.g. the condensation products of phenol, the cresols and resorcinol with formaldehyde, and of phenol with furfural.  The ratio of blood solids (calculated as soluble dried blood) to water in the aqueous material is from 1 : 3 to 1 : 10, and the preferred proportions, by weight, of other ingredients in the glue based on 100 parts by weight of soluble dried blood, are caustic alkali 1-50, lime 1-50, sodium silicate 10-400 and resin 10-1000.  Anti-foaming agents, e.g. pine oil 1-10 parts, and fillers, e.g. wood flour 5-100 parts or walnut shell flour may also be incorporated.