Method of producing plywood

Claim 1

THE METHOD OF JOINING TOGETHER PLIES OF WOOD WHICH COMPRISES APPLYING TO ONE OF THE TWO SURFACES OF THE PILES TO BE ADHESIVELY JOINED TOGETHER A THERMOSETTING ADHESIVE AQUEOUS OIL EMULSION COMPOSITION FOR ADHESIVELY JOINING TOGETHER PLIES OF WOOD COMPRISING A THERMOSETTING PHENOL-ALDEHYDE RESIN DISSOLVED IN AN AQUEOUS ALKALINE MEDIUM, THE SAME CONTAINING FROM ABOUT 30% TO ABOUT 50% BY WEIGHT RESIN AND CAUSTIC SOLIDS, OF WHICH 3 TO 8% ARE CAUSTIC; AND A PETROLEUM DISTILLABLE HYDROCARBON OIL, FORMING AN EMULSION WITH SAID RESIN AQUEOUS ALKALINE MEDIUM, HAVING A FLASH POINT AND A VISCOSITY SIMILAR TO THOSE OF LUBRICATING OILS AND REMAINING LIQUID AT NORMAL ATMOSPHERIC PRESSURES AND TEMPERATURES, SAID OIL BEING PRESENT BETWEEN ABOUT 0.5 PART AND ABOUT 4 PARTS BY WEIGHT PER UNIT WEIGHT OF SOLID PHENOL ALDEHYDE RESIN IN THE AQUEOUS RESIN SOLUTION, SAID EMULSION TENDING TO REMAIN ON THE SURFACE OF THE WOOD AND NOT TO SUBSTANTIALLY PENETRATE THE SAME PENDING APPLICATION OF SETTING AND CURING TEMPERATURES AND PRESSURES OF THE EMULSION; SUPERIMPOSING THE OTHER OF SAID PIECES ON THE PIECE TO WHICH THE SAID COMPOSITION HAS BEEN APPLIED TO FORM AN ASSEMBLY; AND HEATING AND PRESSING THE ASSEMBLY TO CURE THE RESIN AND FORM AN ADHESIVE BOND WITH PRESSURE AND TEMPERATURES IN THE ORDER OF ABOUT 130* C.-160* C. AND OF ABOUT 150-250 P.S.I.

Claim 2

THE METHOD OF JOINING TOGETHER PLIES OF WOOD WHICH COMPRISES APPLYING TO ONE OF THE TWO SURFACES OF THE PILES TO BE ADHESIVELY JOINED TOGETHER A THERMOSETTING ADHESIVE AQUEOUS OIL EMULSION COMPOSITION FOR ADHESIVELY JOINING TOGETHER PLIES OF WOOD COMPRISING A THERMOSETTING PHENOL-ALDEHYDE RESIN DISSOLVED IN AN AQUEOUS ALKALINE MEDIUM, THE SAME CONTAINING FROM ABOUT 30% TO ABOUT 50% BY WEIGHT RESIN AND CAUSTIC SOLIDS, OF WHICH 3 TO 8% ARE CAUSTIC; AND A PETROLEUM DISTILLABLE HYDROCARBON OIL, FORMING AN EMULSION WITH SAID RESIN AQUEOUS ALKALINE MEDIUM, HAVING A FLASH POINT AND A VISCOSITY SIMILAR TO THOSE OF LUBRICATING OILS AND REMAINING LIQUID AT NORMAL ATMOSPHERIC PRESSURES AND TEMPERATURES, SAID OIL BEING PRESENT BETWEEN ABOUT 0.5 PART AND ABOUT 4 PARTS BY WEIGHT PER UNIT WEIGHT OF SOLID PHENOL ALDEHYDE RESIN IN THE AQUEOUS RESIN SOLUTION, SAID EMULSION TENDING TO REMAIN ON THE SURFACE OF THE WOOD AND NOT TO SUBSTANTIALLY PENETRATE THE SAME PENDING APPLICATION OF SETTING AND CURING TEMPERATURES AND PRESSURES OF THE EMULSION; SUPERIMPOSING THE OTHER OF SAID PIECES ON THE PIECE TO WHICH THE SAID COMPOSITION HAS BEEN APPLIED TO FORM AN ASSEMBLY; AND HEATING AND PRESSING THE ASSEMBLY TO CURE THE RESIN AND FORM AN ADHESIVE BOND WITH PRESSURE AND TEMPERATURES IN THE ORDER OF ABOUT 130* C.-160* C. AND OF ABOUT 150-250 P.S.I.