Process for the preparation of aqueous styrene/acrylic acid ester copolymer dispersions
Abstract
Abstract THE PRESENT INVENTION PROVIDES A PROCESS FOR THE PREPARATION OF AN AQUEOUS DISPERSION OF STYRENE/ACRYLATE ESTER MIXED POLYMERS SUBSTANTIALLY FREE OF NOXIOUS ODORS CONSISTING ESSENTIALLY OF THE STEPS OF POLYMERIZING AN INITIAL MIXTURE OF FROM 20% TO 70% BY WEIGHT OF STYRENE MONOMER AND FROM 80% TO 30% BY WEIGHT OF A MONOMER COMPONENT FOR A TIME SUFFICIENT FOR THE RESIDUAL MONOMER CONTENT TO FALL BELOW 3% BY WEIGHT OF THE INITIAL MONOMER CONTENT, THEREAFTER ADJUSTING THE PH TO BETWEEN 3 AND 7 AND ADDING FROM 0.2% TO 10% BY WEIGHT, BASED ON THE WEIGHT OF THE POLYMERIZATE, OF A VINYL ESTER OF AN ALKANOIC ACID HAVING 1 TO 3 CARBON ATOMS, AFTER-POLYMERIZING THE MIXTURE AT A TEMPERATURE OF FROM 50*C. TO 100*C. FOR A TIME SUFFICIENT TO REDUCE SAID RESIDUAL MONOMER CONTENT BELOW 0.35% BY WEIGHT, AND RECOVERING SAID AQUEOUS DISPERSION OF STYRENE-ACRYLATE ESTER MIXED POLYMERS SUBSTANTIALLY FREE OF NOXIOUS ODORS.
Inventors
- 👤 H Wiest
- 👤 E Bergmeister
- 👤 P Kirst
- 👤 C Schmidkonz
Bibliographic Details
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