Heat treatment of rubber-lignin coprecipitates containing certain aldehydes or aldehyde homopolymers

Claim 1

THE METHOD WHICH COMPRISES PREPARING A SUBSTANTIALLY WATER-FREE CO-PRECIPITATED MIXTURE COMPRISING LIGNIN AND A SYNTHETIC RUBBERY COPOLYMER OF BUTADIENE AND A COPOLYMERIZABLE MONOETHYLENICALLY UNSATURATED MONOMER, WHICH COPOLYMER CONTAINS AT LEAST 25% BY WEIGHT OF BUTADIENE; INCORPORATING WITH SAID MIXTURE FROM 0.5 TO 15 PARTS, PER 100 PARTS OF SAID SYNTHETIC POLYMER, OF A REAGENT CONSISTIN OF AN ALDEHYDRIC MATERIAL SELECTED FOR THE GRAOUP CONSISTING OF FURFURAL, DICHLOROACETALDEHYDE, PARALDEHDE, AND FORMALDEHYDE HOMOPOLYERS, WHICH ALDEHYDIC MATERIALS ARE REACTIVE WITH PHENOLS TO FORM RESINS AND WHICH HAVE VAPOR PRESSURES LOWER THAN ONE ATMOSPHERE AT 175* F; HEAT TREATING THE RESULTING COMPOSITION AT A TEMPERATURE OF AT LEAST 300* F.; MASTICATING SAID COMPOSITION AND INCORPORATING THEREWITH A VULCANIZING AGENT; SHAPING AND VULCANIZING THE RESULTING COMPOUND; THE RESULTING VULCANIZATE BEING CHARACTERIZED BY SHOWING A SUBSTANTIALLY HIGHER ABRASION RESISTANCE THAN A VULCANIZATE MADE IN THE SAME WAY, EXCEPT THAT THE INCORPORATION OF SAID ALDEHYDIC MATERIAL IS OMITTED.

Claim 2

THE METHOD WHICH COMPRISES PREPARING A SUBSTANTIALLY WATER-FREE CO-PRECIPITATED MIXTURE COMPRISING LIGNIN AND A SYNTHETIC RUBBERY COPOLYMER OF BUTADIENE AND A COPOLYMERIZABLE MONOETHYLENICALLY UNSATURATED MONOMER, WHICH COPOLYMER CONTAINS AT LEAST 25% BY WEIGHT OF BUTADIENE; INCORPORATING WITH SAID MIXTURE FROM 0.5 TO 15 PARTS, PER 100 PARTS OF SAID SYNTHETIC POLYMER, OF A REAGENT CONSISTIN OF AN ALDEHYDRIC MATERIAL SELECTED FOR THE GRAOUP CONSISTING OF FURFURAL, DICHLOROACETALDEHYDE, PARALDEHDE, AND FORMALDEHYDE HOMOPOLYERS, WHICH ALDEHYDIC MATERIALS ARE REACTIVE WITH PHENOLS TO FORM RESINS AND WHICH HAVE VAPOR PRESSURES LOWER THAN ONE ATMOSPHERE AT 175* F; HEAT TREATING THE RESULTING COMPOSITION AT A TEMPERATURE OF AT LEAST 300* F.; MASTICATING SAID COMPOSITION AND INCORPORATING THEREWITH A VULCANIZING AGENT; SHAPING AND VULCANIZING THE RESULTING COMPOUND; THE RESULTING VULCANIZATE BEING CHARACTERIZED BY SHOWING A SUBSTANTIALLY HIGHER ABRASION RESISTANCE THAN A VULCANIZATE MADE IN THE SAME WAY, EXCEPT THAT THE INCORPORATION OF SAID ALDEHYDIC MATERIAL IS OMITTED.