Dow Global Technolgoies LLC

Braskem America, Inc.

Nutrition & Biosciences USA 1, LLC

Peter E Pierini

Yvonne M Goerlach-Doht

Juergen Hermanns

Clive P Bosnyak

Marie L Hare

Christopher John Tucker

Shaun Eugene Pirtle

Robert B Appell

Jorg Theuerkauf

Marco Grossstueck

Michael Schreck

Yvonne Goerlach-Doht

Provided is a process for reducing the size of ethylcellulose polymer particles comprising Also provided is a dispersion made by such a process.

Size reduction of ethylcellulose polymer particles

The amount of water-insoluble fibers in a water-soluble cellulose derivative is reduced in a process comprising the steps of a) providing a water-soluble cellulose derivative having a residual amount of at least 20 ppm by weight of water-insoluble fibers in a 2 weight percent aqueous solution of the water-soluble cellulose derivative; b) mixing the water-soluble cellulose derivative of step a) with a liquid in a compounder to provide a moist water-soluble cellulose derivative having a temperature of at least 50 C and a moisture content of from 35 to 90 percent, based on the total weight of the moist cellulose derivative; and c) drying-grinding the mixture of step b) in a gas-swept impact mill to obtain a dried and ground cellulose derivative.

Process for reducing the amount of water-insoluble fibers in a water-soluble cellulose derivative

A particulate cellulose derivative is obtained in a process of grinding and drying a moist cellulose derivative which comprises the steps of A) providing a cellulose derivative having a moisture content of from 60 to 95 percent, based on the total weight of the moist cellulose derivative, B) grinding and partially drying the moist cellulose derivative in a gas-swept impact mill; and C) contacting the ground and partially dried cellulose derivative with an additional amount of a drying gas outside the gas-swept impact mill. The obtained particulate cellulose derivative has a high untapped bulk density and a good flowability.

Process for producing cellulose derivatives of high bulk density, good flowability and improved dispersibility in cold water

In a process for producing a particulate polysaccharide derivative by dry-grinding a moist polysaccharide derivative, one or more of the properties selected from median diameter, median length, bulk density and dissolution rate is controlled by controlling the temperature of the polysaccharide derivative prior to dry-grinding. Advantageously one or more of the properties selected from median diameter, median length, bulk density and dissolution rate of the particles after dry-grinding is adjusted to a first value by a first temperature of the polysaccharide derivative prior to dry-grinding and is adjusted to a second value by a second temperature.

Process for dry-grinding a polysaccharide derivative

The invention is directed to a polypropylene resin, which is suitable for manufacturing an air quenched blown film. The resin has a melt flow rate of greater than 5 g/10 min, less than 2% xylene solubles, a pentad isotacticity of greater than 95%, an isotactic pentad/triad ratio of greater than 95%, a crystallinity of at least 65%, and a crystallization temperature of at least 127&#xb0; C. The polypropylene resin contains from 500 ppm to 2500 ppm of a nucleator/clarifier additive. An quenched blown film made from resin exhibits a crystallization onset temperature of at least 116&#xb0; C. and a crystallization half-life time of less 4.1 seconds or less when tested using fast DSC analysis with a scan rate of 200&#xb0; C./minute.

Polypropylene composition for air quenched blown films

The invention is directed to a polypropylene resin which has a M/Mof less than 5, a melt flow rate of less than 7 g/10 min., a 1% secant flexural modulus of greater 5 than 300,000 psi and less than 2 wt. % xylene solubles.

Highly crystalline polypropylene with low xylene solubles

The invention is directed to a polypropylene resin which has a M/Mof less than 5, a melt flow rate of less than 7 g/10 min., a 1% secant flexural modulus of greater than 300,000 psi and less than 2 wt. % xylene solubles.

Growing community of inventors

Lake Jackson, TX, United States of America

Peter E Pierini