Dow Global Technolgoies LLC

The Dow Chemical Company

Karl V Jacob

Robert E Scheid, Jr

Kacee B Ender

Ka Chun A Chan

Tim D Cabelka

Akshay Bellare

Tina P Dasbach

Parvinder Singh Walia

James David Oelberg

Nestor A Vasquez

Steven P Sandor

Timothy Lim

Tod A Sutton

Robert E Scheid

Granular material for dosage forms

A dosage form for controlled release is produced from a composition comprising a granular material having a mean particle diameter of 150 to 350 micrometers and a compactibility resulting in a compact with a tensile strength of at least 1.7 MPa when the granular material is subjected to a compaction pressure of 266 MPa, at least 80 percent of the granular material being a water-soluble cellulose ether, water-soluble cellulose ester, an alkylene oxide homo- or copolymer, or a blend thereof; and an active ingredient.

A process () for manufacturing a shaped article (), comprising the steps of: dry blending () a plurality of different particulated ingredients () to form a uniform particle blend; reblending the particle blend by substantially defining a mass flow in a discharge unit () including an insert () and shaping the particle blend in a part shaping machine () to form the shaped article ().

Process for shaping polymeric articles

A process for recycling and reblending dry, difficult to hydrate polymer fines into a water-swellable fluid absorbent polymer gel is disclosed. The process requires feeding the dry polymer fines into a first mixing zone where they are subjected to spraying with water that at least partially hydrates the fines and mixing, substantially simultaneously with the water contact, at high shear such at the fines are substantial completely hydrated without agglomeration. The hydrated fines are then transported from the first zone into a second mixing zone where blending of the hydrated fines with fresh polymer gel occurs at medium shear such that a substantially uniformly blended product results. The resulting process successfully re-introduces fines into the main product stream wherein the resulting product has high aqueous fluid absorbent capacity and good particulate mechanical integrity.

Process and apparatus for recycling aqueous fluid absorbents fines

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Midland, MI, United States of America

Karl V Jacob