Methods for preparing master batches of additive concentrates

Abstract

Abstract HIGH MELT POINT WAXES OR THEIR DERIVATIVES AE INTERMIXED WITH PIGMENTS OR OTHER ADDITIVE OMPOSITIONS IN "HIGH SPEED" MIXERS OF THE HENSCHEL TYPE, FOR EXAMPLE, TO FORM "MASTER BATCHES" OF ADDITIVE CONCENTRATES AND COLOR CONCENTRATES FOR ADDITION TO PLASTICS AND/OR POLYMERS, RESINS, WAXES, WAX-RESIN MIXTURES AND THE LIKE. MIXING TEMPERATURES ARE ELEVATED ABOVE ROOM TEMPERATURE FOR PREDETERMINED MIXING TIMES. DURING MIXING, THE WAXES OR WAX DERIVATIVES SOFTEN AND COAT THE ADDITIVE PARTICLES. CONCENTRATE PARTICLES ARE THUS FORMED WHOSE AVERAGE PARTICLE SIZE INCREASES UNEXPECTEDLY WITH MIXING TIME, APPARENTLY BY THE OPERATION OF A "PROGESSIVE AGGLOMERATION" PHENOMENON, UNTIL THE OPTIMUM CONCENTRATE PARTICLE-SIZE IS PRODUCED. SUBSEQUENT SIZE REDUCTION BY GRINDING TECHNQIUES ARE PARTLY OR WHOLLY ELIMINATED BY THE METHODS OF THE INVENTIN, AD HIGH QUALITY CONCENTRATES WITH EXCELLENT DISPERSION CHARACTERISTICS ARE PRODUCED.

Inventors

• 👤 A Ridge
• 👤 J Polchet

Bibliographic Details