Celanese International Corporation

Alistair John McLennan

Paul Alexander Scott

Ivan Rossi

Cristiana Licheri

Hans Uwe Faust

Kevin Schofield

The present invention relates to preparation of heterogeneous mixtures of (carboxylated) vinyl ester/ethylene dispersions, such as vinyl acetate/ethylene (VAE) dispersions with polyamideamine-epichlorohydrin (PAE) wet strength resins having a reduced amount of halogenated organic compounds, such as less than 1500 ppm. The dispersion offers extremely low free and bound formaldehyde levels combined with wet tensile strength for use in non-woven textile and paper applications.

Carboxylated vinyl acetate/ethylene copolymer dispersions and uses thereof

Carboxylated vinyl acetate/ethylene copolymer dispersions and uses therof

A polymer dispersion comprising an aqueous, continuous phase and dispersed particles of polyurethane, which is based on organic, non-aromatic isocyanates with a functionality of at least 2, said polyurethane having a high degree of crystallinity and whose crystalline phase has a melting point between 25 and 70&#xb0; C., and a copolymer and/or terpolymer having a T(glass transition temperature) between &#x2212;20 and +50&#xb0; C. obtainable by emulsion polymerization of ethylenically unsaturated monomeric materials containing only C, H, O and/or N atoms, which monomeric materials comprise from 0.5 to 15 percent on the total of monomeric materials of monomers containing at least one nitrile group, in a weight ratio between 50:50 and 10:90 (polyurethane to emulsion polymer), in which the particles of the dispersion are in the form of multiphase particles comprising said polyurethane and said copolymer and/or terpolymer and which dispersion is obtainable by emulsion polymerization of the monomeric materials in the presence of the polyurethane dispersion, said eventual polymer dispersion having a solids content of 30 to 70%. The invention also comprises the use of these dispersions as an adhesive, especially for heat seal laminating, preferably for 3-D(imensional) Laminating. The dispersion is also useful as a size for glass fibers.

Polymer dispersion comprising particles of polyurethane and a copolymer or terpolymer produced by emulsion polymerization of olefinically unsaturated monomers

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Konigstein, Germany

Alistair John McLennan