Abstract: A wax composition has water repellent and adhesive properties, is cheap and has wide application in the manufacture and treatment of corrugated paperboard, fibreboard, particle board and other cellulosic materials. The liquid composition comprises 1-50 wt % of a wax, 1-30 wt % of a starch and 1-50 wt % of a formaldehyde based resin.

Abstract: A cold-setting starch adhesive comprising the mixture of three different types of corn starch having widely different properties, i.e., high amylose corn starch having an amylose content of at least 50%, ordinary corn starch and waxy corn starch, in specific proportions. The adhesive shows excellent properties due to the effective combination of the outstanding properties of the individual types of starch.

Abstract: A crosslinking additive for imparting water resistance to starch-based corrugating adhesive compositions is prepared by reacting acetone and formaldehyde under aqueous alkaline conditions at 20.degree.-80.degree. C. in a molar ratio of 1 mole acetone to about 2 to 5.5 moles formaldehyde, adding to the reaction mixture at least an effective amount of dihydroxyethylene urea to scavenge the free formaldehyde in the mixture, and reacting until the amount of unreacted formaldehyde remaining is reduced to about 0.1-2%. The crosslinking additive thus obtained, which is low in free formaldehyde, may be added directly to a starch-based corrugating adhesive or may be first mixed with dimethylol dihydroxyethylene urea.

Abstract: Particulate resoles are produced by mixing phenol, formaldehyde and amine in an aqueous medium containing a protective colloid. The resoles exhibit improved cure rate and sinter resistance when an alkaline compound is added to the reaction mixture after particulate formation.

Abstract: Particles of active substance each comprising a core of a high molecular substance containing an aldehyde group and a coat applied to the aforementioned core and formed of the reaction product of the aforementioned aldehyde group-containing high molecular substance with a high molecular substance containing active hydrogen, which particles are manufactured by causing particles of the aforementioned aldehyde group-containing high molecular substance to assume a swelled state and allowing the swelled particles to be reacted upon by the aqueous solution of the aforementioned active hydrogen-containing high molecular substance.