A METHOD FOR PREPARING HOLLOW LATEXES

The present invention provides for a process for preparing hollow polymer latexes. A first charge of a organic phase is introduced to an aqueous phase. The first charge of the organic phase comprises monomer, which is virtually insoluble in the aqueous phase, and an inert-nonpolymerizable hydrocarbo...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	WILLIAM E. COHRS, YOHANNES CHONDE, CHARLES J. MCDONALD, DALTON C. MACWILLIAMS
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON CORRECTING FLUIDS DYES FILLING PASTES GENERAL PROCESSES OF COMPOUNDING IMPREGNATING OR COATING OF PAPER INKS MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MAKING GRANULES OR PREFORMS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING PASTES OR SOLIDS FOR COLOURING OR PRINTING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL POLISHES PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRODUCTION OF CELLULOSE PULP COMPOSITIONS RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS USE OF MATERIALS THEREFOR WOODSTAINS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	The present invention provides for a process for preparing hollow polymer latexes. A first charge of a organic phase is introduced to an aqueous phase. The first charge of the organic phase comprises monomer, which is virtually insoluble in the aqueous phase, and an inert-nonpolymerizable hydrocarbon. The polymer formed from polymerizing the monomer is virtually insoluble in the hydrocarbon, the hydrocarbon is virtually insoluble in the aqueous phase and the monomer is miscible with the hydrocarbon. The monomer is polymerized to produce a low molecular weight polymer which phase separates from the organic phase and concentrates at the surface of the organic phase forming a low molecular weight polymer phase. A second charge of the organic phase is then introduced to the aqueous phase when the low molecular weight polymer reaches a conversion of monomer to polymer of equal to or less than 80 percent, wherein the second charge of the organic phase comprises a crosslinking monomer and wherein the crosslinking monomer is imbibed in the low molecular weight polymer phase. Further polymerization produces a hollow polymer latex particle.