Adhesive comprising phenol aldehyde resin and water dispersible gum

Claim 1

AN ADHESIVE COMPRISING (1) A WATER SOLUBLE, FURTHER CONDENSABLE PRODUCT OF THE ALKALI-CATALYZED CONDENSATION OF 1-3 MOLES OF FORMALDEHYDE WITH 1 MOLE OF A PHENOL SELECTED FROM THE GROUP CONSISTING OF PHENOL AND CRESOL, THE PHENOL AND FORMALDEHYDE BEING SO CONDENSED IN CONTACT WITH A WATER DISPERSIBLE GUM SELECTED FROM THE GROUP CONSISTING OF LOCUST BEAN, KARAYA, AND GUAR GUMS, AND (2) SODIUM HYDROXDE SERVING AS CATALYST OF FURTHER CONDENSATION OF THE RESULTING PRODUCT, THE PROPORTION BEWING ABOUT 0.1%-2.5% OF THE GUM AND 3.5%-31.4% OF SODIUM HYDROXIDE ON THE WEIGHT OF THE SELECTED PHENOL, THE SAID SODIUM HYDROXIDE BEING IN ADDITON TO THE ALKALI CATALYST OF THE SAID CONDENSATION, AND THE GUYM SERVING TO DECREASE THE PENETRATION OF THE ADHESIVE COMPOSITION WHEN APPLIED TO WOOD, INCREASE THE PERMISSIBLE ASSEMBLY TIME WITH THE ADHESIVE, AND DECREASE THE TIME REQUIRED FOR CURING AT THE ELEVATED TEMPERATURES OF CURING THEREOF.