Hercules Corporation

Other

Union Carbide Chemicals & Plastics Technology Corporation

Tuyen T Nguyen

Harold Jabloner

Sung G Chu

Kirill Bakeev

Jeffrey K Politis

Michael J Keogh

Paul J Caronia

Laurence Herbert Gross

Richard Lee Brady

De-Kai Loo

Todd Andrew Brugel

Dirk Kruythoff

Atanu Biswas

Frederick F Nelson

Angie H Ma

John Salvatore Furno

Kirill N Bakeev

Arjun C Sau

Mohand Melbouci

Divya Tewari

Teng-Shau Young

Raymond T Leibfried, Sr

Paul C Gillette

Kate Marritt Lusvardi

Harry W Blunt

Konstantin Abraham Vaynberg

Prachur Bhargava

Bruce Kevin Fillipo

Willemina Geesien Salomons

Yuda Zong

Petrus Wilhelmus Franciscus Arisz

Raymond Thomas Leibfried, Sr

Glen T Carroll

James G Binder

Theo Klootwijk

Kostantin A Vaynberg

Betty Maagdenberg-Roels

Willimlen G Salomons

Brenda A Lloyd

Sangrama Sahoo

James B Binder

Jeffery K Politis

Jeffry K Politis

Todd A Brugel

Willimien G Salomons

Bruce K Fillipo

Petrus Wilhelmus Franciscus Arisz Arisz

The presently disclosed and claimed inventive concept(s) relates to a polymer for enhancing drug performance and improving processability. Specifically, the polymer comprises hydroxypropyl methyl cellulose acetate succinate (HPMC-AS). On the HPMC-AS, the percentage of total succinoyl degree of substitution is less than 12% at C6-OH position and greater than 53% at C3-OH, and the percentage of total acetyl degree of substitution is greater than 32% at C6-OH position.

Pharmaceutical compositions with enhanced performance and improved processability

The present invention relates generally to water soluble polymer powder formulations, and more particularly, to a cellulose ether formulation which in powder form is suitable for direct addition to water-based systems to produce smooth, lump free solutions. The cellulose ethers are crosslinked with an aldehyde crosslinker and include a dry weak acid which slows hydrolysis of the hermiacetal linkage formed by the crosslinker. The selected acid does not adversely affect solubility stability.

Water soluble polymer powder formulation having improved dispersing properties

The viscosity of solutions of nonionic synthetic associative thickeners is controlled by adding organophosphates to the solution of associative thickeners. The associative thickeners are hydrophobically modified polymers and the organophosphates include one or more hydrophobic groups.

Viscosity suppression of associative thickeners using organophosphates

A stabilizer composition comprising an AB type polymer for use in increasing Open Time of aqueous coating compositions is disclosed. The stabilizers compositions are of utility in many aqueous compositions including paints, stains, varnishes, adhesives and inks. Of particular interest is the use of the stabilizer compositions for in increasing the Open Time of latex paints as well as alkyd emulsion paints.

Stabilizers for improved open time of aqueous coatings

A synthetic polymer has a water-soluble or water-swellable polyurethane backbone and terminal groups and/or intermediate groups of blocks of hydrophobes of alkyl- or aryl compounds containing a polymerizable cyclic monomer or a polymerizable double bond (or alkene) group or derivatives thereof. The blocks of hydrophobes are composed of two or more units of the same or different hydrophobes. These synthetic polymers are used as rheology modifiers, especially in latex paints.

Colorant compatible hydrophobically modified polyurethane thickener for paint

This invention relates to non-uniformly substituted ('blocky') hydroxyethylcelluloses (HECs) and derivatives thereof that exhibit associative behavior in both neat solutions and in filled systems. The HECs and derivatives thereof exhibit unique and highly desirable rheology and are more efficient in thickening aqueous systems than prior art HEC products. These blocky HECs can be distinguished from prior art and commercial HEC products by having an unsubstituted anhydroglucose trimer ratio (U3R) greater than 0.21 and the hydroxyethyl molar substitution greater than about 1.3 and less than about 5. This invention also relates to processes for making blocky HEC and uses thereof in functional systems.

Blocky hydroxyethylcellulose, derivatives thereof, process of making and uses thereof

An oilfield servicing fluid composition containing an aldehyde guar produced by enzymatic oxidation of a non-derivatized, straight guar or of a guar derivative. The enzyme used to oxidize the guar to the aldehyde guar is galactose oxidase, which may be combined with catalase or catalase and peroxidase. The aldehyde guar is useful as an effective gelling agent for oilfield servicing fluids such as hydraulic fracturing fluids and stimulation fluids.

Oxidized guar for oilfield servicing fluids

A synthetic polymer has a water-soluble or water-swellable polymer backbone and terminal groups and/or intermediate groups of blocks of hydrophobes of alkyl- or aryl compounds containing a polymerizable cyclic monomer or a polymerizable double bond (or alkene) group or derivatives thereof. The blocks of hydrophobes are composed of two or more units of the same or different hydrophobes. These synthetic polymers are used as rheology modifiers, especially in latex paints.

Colorant compatible synthetic thickener for paint

An aqueous dispersion includes an associative thickener based on a hydrophobically modified poly(acetal- or ketal-polyether) (HM-PAPE) and at least one viscosity reducing agent selected from ethoxylated alcohols, ethoxylated acetyleneic diols, phosphate esters, dialkyl sulfosuccinates, and mixtures thereof. This aqueous dispersion improves the incorporation of the HM-PAPEs into aqueous based protective coatings. This dispersion also improves water-borne coating compositions that optionally contain latex.

Aqueous dispersion of poly(acetal-polyether) and its use in protective coatings

Process for the oligomerization of 1-alkenes to internal alkenes and a catalyst therefor. 1-Alkene is combined, in liquid phase and at a temperature of from about 50 to about 200&deg; C., with a catalyst formed by contacting at least one Group VIII transition metal salt with at least one alkylaluminum compound. If the at least one Group VIII transition metal salt includes cobalt and the at least one alkylaluminum compound includes trialkylaluminum compound the process is carried out in the substantial absence of alkoxyaluminum species. The catalyst for the isomerization of 1-alkene to internal alkene is prepared by combining at least one Group VIII transition metal salt and at least one alkylaluminum compound of the general formula AlR X in which R represents an alkyl radical, X represents a halogen radical, a is an integer of from 1 to 3, b is 1 or 2, and the sum (a&plus;b) is 3, in a ratio sufficient to provide an atomic ratio of A1 in the alkylaluminum compound(s) to Group VIII transition metal(s) of at least about 1:1. If the at least one Group VIII transition metal salt includes cobalt and the at least one alkylaluminum compound includes trialkylaluminum compound the catalyst is substantially free of alkoxyaluminum species.

Process for the isomerization of 1-alkenes to internal alkenes and catalyst therefor

Curable polymer compositions comprising a crosslinkable polymeric component; an initiator component; and an allyl compound component.

Allyl compounds, compositions containing allyl compounds and processes for forming and curing polymer compositions

Process for making paper having improved strength characteristics by adding to the pulp water-soluble and/or water-dispersible cationic polymer and oxidized galactose type of alcohol configuration containing polymer.

Paper having improved strength characteristics and process for making same

Additives for addition to starting materials in cellulose based products for imparting strength and crepe. Additives for use in paper production which impart strength to the product and which can be used in creping adhesives. Enzyme activated resins for use in paper production. Enzyme-activated adhesives for use in paper production. Paper products comprising the aforementioned additives or resins. Methods for imparting strength or crepe to paper products.

Adhesives and resins, and processes for their production

Polyethylene crosslinkable composition

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Wilmington, DE, United States of America

Tuyen T Nguyen