Hercules Corporation

Aqualon Company

Dirk Kruythoff

Tuyen T Nguyen

Gijsbert Kroon

Sung G Chu

Kirill Bakeev

Jeffrey K Politis

Dekai Loo

Willemina Geesien Salomons

Andre H Van Waveren

Bernardus J Janssen

Willemien G Salomons

Adriana Veldhorst

Jacobus G deHullu

Willimlen G Salomons

Betty Maagdenberg-Roels

Theo Klootwijk

James G Binder

Sung Gun Chu

Kirill N Bakeev

Tara Lyn Everett

Tuyen Thanh Nguyen

Willimien G Salomons

Jeffery K Politis

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

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

A pressure sensitive adhesive(PSA) composition includes a latex system of an aqueous polymer dispersion derived from ethylenically-unsaturated monomers in the presence of a water soluble protective colloid. The PSA compositions are used in the manufacture of a variety of articles that are intended to be easily attachable to another substrate by the application of pressure alone.

Pressure sensitive adhesives

A process is provided for preparing an acrylic copolymer latex having improved mechanical and shear stability comprising emulsion polymerizing at least one ethylenically unsaturated monomer having up to 23 carbons in the presence of, by weight based on the total monomer content, a) from about 0.05% to about 5.0% of a protective colloid with a molecular weight of less than 75,000, and b) from about 0.01% to about 1.5% of at least one water soluble free radical polymerization initiator. This latex provides coating manufacturers the flexibility of either eliminating surfactants altogether from coating or to use small amounts thereof.

Cellulose ethers in emulsion polymerization dispersions

A paper coating composition is provided having a clay-containing pigment system, a binder, a polysaccharide thickener, and at least 0.005% to 2%, based upon the weight of the polymer, of a blocking agent that serves to prevent more than 25% of the polysaccharide thickener from being adsorbed onto the clay pigment surface. This coating is applied to raw paper for producing a high quality paper with smooth and substantially free of indentations surfaces for good ink to paper transfer.

Paper coating composition with increased thickener efficiency

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Papendrecht, Netherlands

Dirk Kruythoff