Bison-werke Bahre Und Greten Gmbh & Co. Kg

Arno Nass

A method for the manufacture of an adhesive from animal blood is described in which the blood is dried and stored as a dried mass of blood and in which this dried mass of blood is then converted to a sprayable solution of up to 40% concentration by the addition of water. The ready-to-use adhesive is finally prepared by the admixture, preferably during spraying, of a monobasic organic acid in a quantity sufficient to produce a pH value of the adhesive between 3.0 and 4.0. In a modification of the method an extender or diluent preferably in the form of sodium chloride, is added to the blood prior to drying. The drying step can be carried out by means of vacuum drying, freeze drying or drying through atomization. It is also advantageous to cool the blood to a temperature of approximately 4.degree. C. in the period between accumulation and drying. The resulting adhesive is particularly suitable for use as a binder in the manufacture of particle board from wooden chips.

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Hameln, Germany

Arno Nass