Method of forming pellets of a synthetic rubber latex and a particulate resin

Claim 1

A METHOD OF MAKING MOLDING PELLETS COMPRISING PROVIDING A DRY PARTICULATE FUSIBLE SYNTHETIC RESIN SELECTED FROM THE GROUP CONSISTING OF CASHEW NUT SHELL OIL-MODIFIED PHENOL-FORMALDEHYDE RESIN AND POLYVINYL CHLORIDE RESIN, COMPLETELY ENCASING INDIVIDUAL PARTICLES OF SAID RESIN WITH A RUBBERY COPOLYMER OF BUTADIENE AND ACRYLONITRILE IN LATEX FORM BY BLENDING THE SAID RESIN IN DRY, PARTICULATE FORM AND THE SAID LATEX AT A TEMPERATURE BELOW THAT AT WHICH THE SAID RESIN AND RUBBERY COPOLYMER UNDERGO FUSION INTO A SINGLE PHASE, TO FORM DIRECTLY A GRANULAR FREE-FLOWING MIXTURE IN WHICH THE SAID RESIN AND RUBBERY COPOLYMER EXIST AS SEPARATE PHASES, THE PROPORTION OF SAID LATEX BEING SUCH THAT THE WATER CONTENT OF THE RESULTING GRANULAR FREE-FLOWING MIXTURE IS FROM 4 TO 60%, EVAPORATING THE BULK OF THE WATER FROM THE MIXTURE, CHARGING THE MIXTURE TO AN EXTRUSION DEVICE WHEREIN THE MIXTURE IS MASTICATED WHILE BEING HEATED TO AN ELEVATED TEMPERATURE WHICH IS SUFFICIENT TO EFFECT CONSOLIDATION OF THE MIXTURE AND FUSION OF THE SAID RESIN AND RUBBERY COPOLYMER INTO A SINGLE PHASE, SUBJECTING THE MIXTURE TO VACUUM WITHIN THE EXTRUSION DEVICE DURING SAID MASTICATION AND HEATING TO REMOVE RESIDUAL WATER, THEREAFTER PASSING THE MIXTURE THROUGH A DIE OF THE EXTRUSION DEVICE AND PELLETIZING THE EMERGING MIXTURE TO FORM MOLDING PELLETS.

Claim 2

A METHOD OF MAKING MOLDING PELLETS COMPRISING PROVIDING A DRY PARTICULATE FUSIBLE SYNTHETIC RESIN SELECTED FROM THE GROUP CONSISTING OF CASHEW NUT SHELL OIL-MODIFIED PHENOL-FORMALDEHYDE RESIN AND POLYVINYL CHLORIDE RESIN, COMPLETELY ENCASING INDIVIDUAL PARTICLES OF SAID RESIN WITH A RUBBERY COPOLYMER OF BUTADIENE AND ACRYLONITRILE IN LATEX FORM BY BLENDING THE SAID RESIN IN DRY, PARTICULATE FORM AND THE SAID LATEX AT A TEMPERATURE BELOW THAT AT WHICH THE SAID RESIN AND RUBBERY COPOLYMER UNDERGO FUSION INTO A SINGLE PHASE, TO FORM DIRECTLY A GRANULAR FREE-FLOWING MIXTURE IN WHICH THE SAID RESIN AND RUBBERY COPOLYMER EXIST AS SEPARATE PHASES, THE PROPORTION OF SAID LATEX BEING SUCH THAT THE WATER CONTENT OF THE RESULTING GRANULAR FREE-FLOWING MIXTURE IS FROM 4 TO 60%, EVAPORATING THE BULK OF THE WATER FROM THE MIXTURE, CHARGING THE MIXTURE TO AN EXTRUSION DEVICE WHEREIN THE MIXTURE IS MASTICATED WHILE BEING HEATED TO AN ELEVATED TEMPERATURE WHICH IS SUFFICIENT TO EFFECT CONSOLIDATION OF THE MIXTURE AND FUSION OF THE SAID RESIN AND RUBBERY COPOLYMER INTO A SINGLE PHASE, SUBJECTING THE MIXTURE TO VACUUM WITHIN THE EXTRUSION DEVICE DURING SAID MASTICATION AND HEATING TO REMOVE RESIDUAL WATER, THEREAFTER PASSING THE MIXTURE THROUGH A DIE OF THE EXTRUSION DEVICE AND PELLETIZING THE EMERGING MIXTURE TO FORM MOLDING PELLETS.