Composition comprising polyester modified phenol-formaldehyde resin and method of preparing same

Claim 1

A POLYESTER MODIFIED PHENOL-FORMALDEHYDE RESIN COMPRISING AT LEAST A PAIR OF PHENOL-FORMALDEHYDE POLYMER FRAGMENTS HAVING FREE PHENOLIC -OH GROUPS AND UNSUBSTITUTED REACTIVE HYDROGEN ON THE PHENOLIC NUCLEI, AND SAID FRAGMENTS EACH HAVING ATTACHED AR PHENOXY POSITION THEREOF A GROUP SELECTED FROM THE GROUP CONSISTING OF ALKANOL AND ALKANOIC GROUPS WHICH CONTAINS AT LEAST TWO METHYLENE GROUPS ATTACHED DIRECTLY TO SAID PHENOXY ATTACHED PHENOXY POSITIONS, SAID GOUPS BEING JOINED TOGETHER BY POLYESTERIFICATION WITH THE COMPLEMENTAL DIFUNCTIONAL GROUP SELECTED FROM THE GROUP CONSISTING OD SATURATED UNBRANCHED DICARBOXY ACID, SATURATED UNBRANCHED DIOL AND A POLYESTER COMBINATION THEREOF TO THEREBY COMPLETE A POLYESTER CHAIN BETWEEN THE PHENOXY POSITIONS OF THE PHENOLIC FRAGMENTS, SAID POLYESTER CHAIN REPRESENTING BETWEEN ABOUT TWENTY AND ABOUT EIGHTY PERCENT BY WEIGHT OF THE RESIN, SAID FRAGMENTS IN THE RESIN BEING ON AVERAGE ABOUT 3.5 PHENOLIC NUCLEI IN LENGTH EACH CONTAINING ON AVERAGE ABOUT 1.22 OF THE PHENOXY-ATTACHED GROUPS SO THAT LESS THAN FIFTY PERCENT OF THE PHENOLIC -OH GROUPS ARE REPLACED BY SAID PHENOXY-ATTACHED GROUPS.