Preparation of rigid polyvinyl chloride particles having a high bulk density
Abstract
Abstract EMPLOYING RESIN PRODUCED BY AQUEOUS SUSPENSION POLYMERIZATIN, A RIGID POLYVINYL CHLORIED RESIN POWDER COMPOSITION HAS BEEN PREPARED IN MIXING PROCEDURES WHEREIN MAXIMUM TEMPERATURES ATTAINED RANGE GENERALLY FROM 340*F. TO 425*F. BY REASON OF THESE ELEVATED MIXING TEMPERATURES, THE COMPOSITION HAS A HIGHER BULK DENSITY THAN SIMILAR POWDER FORMULATIONS PREPARED ACCORDING TO PRIOR ART METHODS. MOST IMPORTANT, IT EXHIBITS FUSION AND PROCESSING CHARACTERISTICS SIGNIFICANTLY ALTERED FROM THOSE OF THE PRIOR ART FORMULATIONS AND MAY BE PROCESSED AT HIGH RATES IN MANY DIFFERENET TYPES OF EQUIPMENT. THIS DENSIFIED, RIGID POLYVINYL CHLORIDE RESIN POWDER COMPOSITION IS USEFUL FOR THE PREPARATION OF HIGHQUALITY PLASTIC ARTICLES, E.G., PIPE, FITTINGS, RODS, TUBES, FILM, SHEETING OR CONTAINERS, BOTH BY EXTRUSION AND MOLDING TECHNIQUE.
Inventors
- 👤 Joweph M Georgiana
- 👤 Anthony M Mierzwa
- 👤 Robert A Paradis
- 👤 James A Rolls
- 👤 Donald R Voss
Bibliographic Details
Claims Analysis
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