Protected wood structure and method of making same

Claim 1

A METHOD OF PROTECTING A BODY OF WOOD AGAINST DESTRUCTIVE INFLUENCES WHICH COMPRISES PLACING DIRECTLY IN CONTACT WITH A FACE OF SAID BODY OF WOOD WHICH IS TO BE PROTECTED AN INCURED SOLVENT-FREE SOLID MIXTURE CONSISTING ESSENTIALLY OF A CASHEW NUT SHELL OIL-MODIFIED LOWER MOLECULAR WEIGHT PHENOL-FORMALDEHYDE RESIN WHICH IS SOLUBLE AND FUSIBLE BUT CONVERTIBLE TO INSOLUBLE INFUSIBLE FORM BY THE ACTION OF HEAT AND A METHYLENE-YIELDING HARDENING AGENT, A METHYLENEYIELDING HARDENING AGENT FOR SAID RESIN IN AMOUNT SUFFICIENT TO ADVANCE THE SAME TO INSOLUBLE, INFUSIBLE FORM, A RUBBERY BUTADIENE-ACRYLONITRILE COPOLYMER COMPATIBLE WITH SAID RESIN, AND DIATOMACEOUS EARTH, SAID RESIN AND SAID COPOLYMER BEING PRESENT IN PROPORTIONS OF FROM 30 TO 70% BY WEIGHT OF SAID RESIN AND CORRESPONDINGLY FROM 70 TO 30% BY WEIGHT OF SAID COPOLYMER, SAID PERCENTAGES BEING BASED ON THE SUM OF SAID RESIN AND AND SAID COPOLYMER, SAID DIATOMACEOUS EARTH BEING PRESENT IN A PROPORTION OF FROM 30 TO 55% BY WEIGHT BASED ON THE SUM OF SAID RESIN AND SAID COPOLYMER, AND PRESSING SAID MIXTURE DIRECTLY AGAINST SAID FACE WHILE SUBJECTING SAID MIXTURE TO HEAT, THE DEGREE OF PRESSURE AND HEAT BEING SUCH AS TO CONVERT SAID MIXTURE TO A CONTINUOUS FACING, CURE SAID MIXTURE AND EFFECT TENACIOUS ADHESION THEREOF TO SAID FACE.