Dow Global Technolgoies LLC

Rohm and Haas Company

David M Meunier

Fanwen Zeng

Liang Chen

Rongjuan Cong

Abhishek Roy

Lyndsay M Leal

William L Winniford

Matthew D Miller

John W Lyons

Alexander Willem deGroot

Yunshen Chen

Randy J Pell

Freddy A Van Damme

Theodore M Stokich, Jr

Lu Bai

Luqing Qi

Robert K Prud'homme

Meinolf Brackhagen

Oliver Petermann

Matthias Sprehe

Nicholas S Grasman

Patrick B Smith

David E Wallick

Yongfu Li

Roja Ergun

Scott A Baker

Bradley S Thomson

Theodore M Stokich

Matthew Miller

Theodore Stokich

A hydrophilic silica/polymer blend is provided comprising (a) a hydrophilic silica powder; and (b) a thickening polymer powder, comprising (i) structural units of Calkyl (meth)acrylate monomer; (ii) structural units of (meth)acrylic acid monomer; (iii) structural units of (methoxy) poly(ethylene glycol) (meth)acrylate monomer; and (iv) structural units of multiethylenically unsaturated monomer; wherein the weight ratio of hydrophilic silica powder to thickening polymer powder in the hydrophilic silica/polymer blend is 1:9 to 9:1. Also provided are personal care compositions containing same and methods of using same.

Hydrophilic silica/polymer blend

A polymer/hydrophilic silica blend is provided comprising (a) a thickening polymer powder, comprising (i) structural units of Calkyl (meth)acrylate monomer; (ii) structural units of (meth)acrylic acid monomer, and (iii) structural units of a specialized associative monomer of formula (I) wherein Ris a linear saturated Calkyl group; and n is an average of 20 to 28; and (b) a hydrophilic silica powder; wherein the weight ratio of hydrophilic silica powder to thickening polymer powder in the polymer/hydrophilic silica blend is 1:9 to 9:1. Also provided are personal care compositions containing same and methods of using same.

Polymer/hydrophilic silica oil blend

A partially cross-linked esterified cellulose ether having A) groups of the formula &#x2014;C(O)&#x2014;R&#x2014;COOA or a combination of aliphatic monovalent acyl groups and groups of the formula &#x2014;C(O)&#x2014;R&#x2014;COOA, wherein R is a divalent aliphatic or aromatic hydrocarbon group and A is hydrogen or a cation, and B) having a molecular weight distribution such that [Wf(&#x3e;100 k)&#x2212;Wf(&#x3e;100 k)XL]/Wf(&#x3e;100 k)XL is at least 0.20, wherein Wf(&#x3e;100 k) is the total weight fraction of the esterified cellulose ether that exceeds 100,000 g/mol, and Wf(&#x3e;100 k)XL is the weight fraction that exceeds 100,000 g/mol of the methylated esterified cellulose ether is useful as enteric polymer for pharmaceutical dosage forms.

Partially cross-linked esterified cellulose ethers

The invention provides methods for chromatography of a polyolefin polymer, comprising introducing a solution of the polyolefin polymer into a liquid flowing through a liquid chromatography stationary phase, the liquid chromatography stationary phase comprising graphitic carbon. The invention also provides an apparatus for polyolefin polymer chromatography, comprising a liquid chromatography stationary phase, the liquid chromatography stationary phase comprising graphitic carbon and at least one inert filler.

Chromatography of polyolefin polymers

A method for multi-dimensional chromatography of a polyolefin polymer, comprising introducing a solution of the polyolefin polymer into a liquid flowing through a first liquid chromatography stationary phase or a field flow fractionation device and subsequently flowing the solution through a second liquid chromatography stationary phase, the second liquid chromatography stationary phase comprising graphitic carbon, the polyolefin polymer emerging from the liquid chromatography stationary phase with a retention factor greater than zero.

A process for characterizing a sample comprising a population of linear macromolecules of interest () and a population of long chain branched macromolecules of interest (), the process including four steps. The first step is to provide a flow through separating medium () and a liquid eluant () in which the macromolecules of interest dissolve, the separating medium defining flow through channels (), the eluant flow rate and the average diameter of the channels being in a range so that the linear macromolecules of interest elute before the long chain branched macromolecules of interest () (). The second step is to introduce a sample into the liquid eluant. The third step is to flow the liquid eluant under pressure through the channels () of the separating medium (). The fourth step is to differentiate the linear macromolecules of interest () from the long chain branched macromolecules of interest () based on their successive elution volumes established in the third step such as by determining the refractive index of the successive elution volumes or by subjecting the successive elution volumes to size exclusion chromatography.

Molecular topological fractionation of macromolecules

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Midland, MI, United States of America

David M Meunier