Method of preparing high solids latices of film-forming polymers and high density ethylene polymers

Claim 1

A METHOD OF MAKING AN IMPROVED LATEX FOR PAINT AND SURFACE COATINGS WHICH COMPRISES FORMING A SOLUTION OF FROM 2 TO 10 WEIGHT PERCENT OF ETHYLENE POLYMER IN INERT AND NON-DELETERIOUS HYDROCARBON LIQUID SOLVENT SELECTED FROM THE GROUP CONSISTING OF PARAFFINS, CYCLOPARAFFINS AND MIXTURES THEREOF, AND HAVING 3 TO 12 CARBON ATOMS PER MOLECULE, SAID ETHYLENE POLYMER BEING SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE AND COPOLYMERS OF ETHYLENE WITH ACYCLIC MONOOLEFIN HAVING FROM 3 TO 8 CARBON ATOMS PER MOLECULE, SAID COPOLYMERS BEING POLYMERIZATES OF MONOMER SYSTEMS CONTAINING AT LEAST 90 PARTS BY WEIGHT OF ETHYLENE PER 100 PARTS OF POLYMERIZABLE MATERIAL, SAID ETHYLENE POLYMER BEING CHARACTERIZED BY A DENSITY OF 0.94 TO 0.99 GRAM PER CUBIC CENTIMETER AT 25*C. AND A CRYSTALLINITY OF ABOUT 80 TO 94 PERCENT AND 25*C., FORMING A LATEX OF A FILM-FORMING POLYMER SELECTED FROM THE GROUP CONSISTING OF BUTADIENE-STYRENE COPOLYMER, POLYSTYRENE, POLYVINYLACETATE, VINYL CHLORIDEVINYLIDENE CHLORIDE COPOLYMER, POLYVINYL CHLORIDE, BUTADIENE-ACRYLONITRILE COPOLYMER, AND CHLORINATED NATURAL RUBBER, HEATING AND CONCENTRATING SAID LATEX TO ABOUT 40 TO 60 WEIGHT PERCENT SOLIDS, BLENDING SAID SOLUTION AND SAID LATEX IN A SOLIDS WEIGHT RATIO OF 5 TO 100 PARTS OF ETHYLENE POLYMER PER 100 PARTS OF FILM-FORMING POLYMER WHILE MAINTAINING THE TEMPERATURE OF THE COMBINED MATERIALS ABOVE THE SOFTENING POINT OF THE ETHYLENE POLYMER, THUS FORMING A HOMOGENEOUS MIXTURE, FLASHING SAID MIXTURE TO REMOVE SOLVENT THEREFROM, AND COOLING SAID MIXTURE TO A TEMPERATURE IN THE RANGE OF 150 TO 225*F., SAID FLASHING STEP BEING PERFORMED WITHIN ABOUT 5 MINUTES AFTER SAID LATEX HEATING STEP, THEREBY PREVENTING SAID LATEX FROM COAGULATING PREMATURELY AND PRODUCING A LATEX PRODUCT CONTAINING FROM 40 TO 60 WEIGHT PERCENT SOLIDS.

Claim 2

A METHOD OF MAKING AN IMPROVED LATEX FOR PAINT AND SURFACE COATINGS WHICH COMPRISES FORMING A SOLUTION OF FROM 2 TO 10 WEIGHT PERCENT OF ETHYLENE POLYMER IN INERT AND NON-DELETERIOUS HYDROCARBON LIQUID SOLVENT SELECTED FROM THE GROUP CONSISTING OF PARAFFINS, CYCLOPARAFFINS AND MIXTURES THEREOF, AND HAVING 3 TO 12 CARBON ATOMS PER MOLECULE, SAID ETHYLENE POLYMER BEING SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE AND COPOLYMERS OF ETHYLENE WITH ACYCLIC MONOOLEFIN HAVING FROM 3 TO 8 CARBON ATOMS PER MOLECULE, SAID COPOLYMERS BEING POLYMERIZATES OF MONOMER SYSTEMS CONTAINING AT LEAST 90 PARTS BY WEIGHT OF ETHYLENE PER 100 PARTS OF POLYMERIZABLE MATERIAL, SAID ETHYLENE POLYMER BEING CHARACTERIZED BY A DENSITY OF 0.94 TO 0.99 GRAM PER CUBIC CENTIMETER AT 25*C. AND A CRYSTALLINITY OF ABOUT 80 TO 94 PERCENT AND 25*C., FORMING A LATEX OF A FILM-FORMING POLYMER SELECTED FROM THE GROUP CONSISTING OF BUTADIENE-STYRENE COPOLYMER, POLYSTYRENE, POLYVINYLACETATE, VINYL CHLORIDEVINYLIDENE CHLORIDE COPOLYMER, POLYVINYL CHLORIDE, BUTADIENE-ACRYLONITRILE COPOLYMER, AND CHLORINATED NATURAL RUBBER, HEATING AND CONCENTRATING SAID LATEX TO ABOUT 40 TO 60 WEIGHT PERCENT SOLIDS, BLENDING SAID SOLUTION AND SAID LATEX IN A SOLIDS WEIGHT RATIO OF 5 TO 100 PARTS OF ETHYLENE POLYMER PER 100 PARTS OF FILM-FORMING POLYMER WHILE MAINTAINING THE TEMPERATURE OF THE COMBINED MATERIALS ABOVE THE SOFTENING POINT OF THE ETHYLENE POLYMER, THUS FORMING A HOMOGENEOUS MIXTURE, FLASHING SAID MIXTURE TO REMOVE SOLVENT THEREFROM, AND COOLING SAID MIXTURE TO A TEMPERATURE IN THE RANGE OF 150 TO 225*F., SAID FLASHING STEP BEING PERFORMED WITHIN ABOUT 5 MINUTES AFTER SAID LATEX HEATING STEP, THEREBY PREVENTING SAID LATEX FROM COAGULATING PREMATURELY AND PRODUCING A LATEX PRODUCT CONTAINING FROM 40 TO 60 WEIGHT PERCENT SOLIDS.