E.i. Dupont De Nemours and Company

Yanhui Niu

Christian Peter Lenges

Jiang Ding

Yu-Ling Hsiao

Young H Kim

Robert John Barsotti

Renee Jeanne Kelly

Robert James Butera

Zuohong Yin

Stefan Reinartz

John S Chapman

Cheryl Marie Stancik

Judith Johanna Van Gorp

Robert J Butera

Renee J Kelly

The invention is a process useful for providing a treated support comprising a porous nanoweb coating wherein the treated support is characterized by a biofilm cell count of less than 50% that of an untreated porous support control. The process is useful for modifying porous materials, such as filter media and barrier fabrics to provide resistance to biofouling. The porous nanoweb coating is comprised of fibrous structures derived from gelation and drying of supramolecular assemblies of non-covalently bonded organogelators. Typical organogelators useful in the invention include those that assemble via hydrogen bonding and &#x3c0;-stacking.

Method for providing resistance to biofouling in a porous support

Processes for preparing relatively high molecular weight poly(trimethylene ether)glycol employing a cocatalyst system are provided.

Process for preparing poly(trimethylene ether) glycol and copolymers thereof

The present invention provides for a rheology control agent that includes a following compound represented by the following formula: wherein A, B, C and D equal CH, CHR, NH, or O, and A, B, C and D may be the same or different and at least one of A and B equals NH and at least one of C and D equals NH; and wherein R, R, and Rmay be the same or different and represent a linear, branched, hyper-branched, or dendritic ether, polyether or hydrocarbon based chain, optionally forming at least one carbon-based ring, being saturated or unsaturated and Rrepresents linear or branched alkylenes, ethers, polyethers, or polyester linkages and at least one of R, R, and Rcomprises an ester group or an amide group which is branched off from the main chain; excluded from Formula (1) is a compound wherein Ris CH&#x2014;CH&#x2014;CH&#x2014;CH&#x2014;CH(C(O)OCH), A, B, C, and D are equal to NH and Rand Rare both equal to a linear octyl hydrocarbon chain; the rheology control agent is suitable for solvent-borne and water-borne coating composition having improved rheology control useful for OEM refinishing or repainting the exterior of automobile and truck bodies and parts thereof.

Rheology control agents

The present invention relates to a process for preparing lower-color polytrimethylene ether glycol, comprising contacting said polytrimethylene ether glycol, or its precursor reaction-mixture, with a hydride compound during at least one stage of the process of manufacture, or on the polytrimethylene ether glycol resulting form such process, such that the polytrimethylene ether glycol demonstrates a reduced color (as compared to using no hydride compound).

Lower-color polytrimethylene ether glycol using hydride compounds

The present invention is directed to a rheology control agent for coating compositions. The rheology control agent includes a compound having the Formula (II) including isomers or mixtures of isomers thereof: wherein R, R, R, m and n are described in the specification. The coating compositions containing the rheology control agent have improved rheology control on application and are useful for OEM, refinishing or repainting the exterior of automobile and truck bodies and parts thereof.

Rheology control agents for coating compositions

The present invention is directed to a rheology control agent for coating compositions. The rheology control agent includes a compound having the Formula (I) including isomers or mixtures of isomers thereof: wherein p is 0, 1, 2, or 3; and R, R, R, X and Y groups are described in the specification. The solvent-borne coating compositions containing the rheology control agent have improved rheology control on application and are useful for OEM, refinishing or repainting the exterior of automobile and truck bodies and parts thereof.

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Newark, DE, United States of America

Yanhui Niu