Wacker Chemicalcorporation

Air Products Polymers, L.p.

Ronald Bernal Jones

John Joseph Rabasco

Joel Erwin Goldstein

John Richard Boylan

Christian Leonard Daniels

Blaine Richard Hobar

Lloyd Mahlon Robeson

Richard Henry Bott

William E Lenney

Lisa Ann Mercando

George Davidowich

Dennis Sagl

John Joseph Halat

The invention provides a polymer dispersion for paper coating compositions, obtainable by means of a radically initiated, aqueous emulsion polymerization in the presence of one or more emulsifiers and optionally protective colloids, of a) 50 to 93% by weight of at least one vinyl ester of an alkanoic acid with 1 to 12 C-atoms, whose homopolymer has a glass transition temperature Tg of below about 350&#xb0; K, b) 2 to 30% by weight of ethylene, c) 5 to 20% by weight of at least one monomer whose homopolymer has a glass transition temperature Tg of at least about 350&#xb0; K, d) 0.1 to 2% by weight of ethylenically unsaturated silane monomers, e) 0 to 5% by weight of further ethylenically unsaturated monomers that are copolymerizable with vinyl acetate and ethylene, based in each case on the total weight of the monomers used for the polymerization, with the data in % by weight summing in each case to 100% by weight.

Binder for paper coating compositions

This invention is directed to methods of incorporating a trigger such as boric acid, boric acid salts, sodium sulfate, or other salts, into a nonwoven web substrate for the preparation of dry nonwoven products which are redispersible when put in contact with large amounts of water or liquid. In one method, the trigger is in a dry powder form and is incorporated into the nonwoven fibers followed by treatment of the fibers with an aqueous redispersible binder, and binding and drying the web. Another method is to saturate a dry bonded nonwoven web with an aqueous solution of the trigger and then dry the saturated web. Yet another method is to apply an aqueous solution of the trigger to the web followed by applying a redispersible aqueous binder to the web and then heating and drying the web.

Dry chemically bound nonwovens which are flushable and dispersible

This invention is directed to an improvement in nonwoven products comprised of a nonwoven web of fibers bonded together with polymeric binder comprised of emulsion polymerized units of vinyl acetate, ethylene, and a crosslinking monomer. The polymer is stabilized with a surfactant having a critical micelle concentration of about 0.5 to 3% by weight. The surfactant is employed in the polymerization in an amount less than 1% by weight, based upon the total weight of polymer.

Self-crosslinking vinyl acetate-ethylene polymeric binders for nonwoven webs

A cellulosic product such as paper coating composition is disclosed comprising aqueous-based semi-crystalline vinyl acetate-ethylene polymer emulsions, containing crystalline ethylene segments, which are useful for imparting oil, grease, solvent, water, and moisture vapor resistance. The polymer emulsions are prepared via the direct aqueous-based free radical emulsion polymerization of ethylene with various other comonomers. The semi-crystalline aqueous-based polymer emulsions of this invention have a crystalline melting point and a crystalline heat of fusion ranging from 5 to 100 J/g. The semi-crystalline aqueous-based emulsion polymers of this invention can be used directly as a paper or paperboard coating for imparting oil, grease, solvent, water, and moisture vapor resistance. Further, the present invention provides a repulpable paper and paperboard.

Polymer emulsion coatings for cellulosic substrates with improved barrier properties

The present invention is directed to an improvement in the wet tensile of a nonwoven web, whether the web is for a pre-moistened nonwoven wet wipe that is both safe to use and also flushes, disperses and finally biodegrades in appropriate environments or for a nonwoven web which requires high tensile strength when in contact with liquids. An improvement in the wet tensile of the nonwoven webs is achieved by incorporating a finite amount of poly(acrylic acid) into a polymeric binder system that is applied to the web.

Wet tensile strength of nonwoven webs

High performance filters comprise a basestock impregnated with an aqueous based poly(vinyl alcohol) graft emulsion copolymer as binder. The aqueous based poly(vinyl alcohol) graft emulsion copolymer binder is prepared by graft polymerizing one or more ethylenically unsaturated monomer in an aqueous poly(vinyl alcohol) solution in which at least 30% of the total poly(vinyl alcohol) is 70 to 97 mol % hydrolyzed.

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Allentown, PA, United States of America

Ronald Bernal Jones