Merck + Co., Inc.

Thomas A Lindroth

George T Colegrove

Glen H Best

Floyd L Allen

Joseph S Racciato

Philip E Winston

Robert D Carico

Nicholas J Iammarino

Patrick A Pickens

Polysaccharide fibers are produced by hot extrusion of a gelling polysaccharide into air or a gelling salt bath. Optionally, other polysaccharides, including non-gelling types, may be co-extruded with the gelling polysaccharide. The fibers are useful for the production of wound dressings and catamenial devices, and many other devices.

Process for making polysaccharide fibers

Cement compositions, i.e., mortar, structured concrete, pre-cast concrete, and oilfield cement, comprising 0.01-0.9% (wt/wt) welan gum are described.

Welan gum in cement compositions

Low viscosity welan gum having a 5% (wt.) aqueous solution viscosity of 100 cP and process for preparation of such are described.

Low viscosity heteropolysaccharides, e.g., zanthan gum, S-194, and guar gum, are disclosed. These gums are especially useful in preparing herbicidal compositions.

Low viscosity heteropolysaccharides

Low viscosity heteropolysaccharides, e.g., xanthan gum, S-194, and guar gum, are disclosed. These gums are especially useful in preparing herbicidal compositions.

Solid, herbicidal complexes

Bipyridinium quaternary salt compositions are prepared which are dry, free-flowing, wettable powders. The solid compositions are complexes of the bipyridinium salts and algin.

Solid, herbicidal bipyridinium quaternary salt compositions

An aqueous slurry containing ground coal and a biosynthetic polysaccharide is disclosed.

Coal slurry

Water-based paints exhibiting improved stability and application properties are obtained by adding to 100 gallons (379 liters) of paint from 1 to 7 pounds (0.45 to 3.2 kg) of Heteropolysaccharide S-156.

Use of Heteropolysaccharide S-156 in latex paint

Texturized wall coverings comprising inexpensive materials such as paper pulp fibers, textile linters, and cotton threads can be made water resistant by the incorporation therein of a blend of tamarind gum, algin, and, optionally, guar gum.

Water resistant texturized wall coverings

High concentration polymer slurries contain up to 65 weight % xanthan gum in a hydrophobic solvent base treated with suspending agents, dispersants, and thinning agents. Mineral oil, diesel oil, kerosene, alcohols (six to twelve carbons), vegetable oil, ester-alcohols, polyol ethers, and the like may be used as the solvent. The preferred suspending agent is either an organophilic clay or hydroxypropyl cellulose. The preferred dispersant is either an ethoxylated linear alcohol or a fatty acid ester of vegetable oil or animal oil. The preferred thinning agent is lecithin. These slurries greatly improve the dispersibility of xanthan gum or any other hydrophilic colloid, such as guar, hydroxypropyl guar, cellulosics, polyacrylamides, and the like.

High concentration polymer slurries

Sodium cellulose sulfate can be used alone, or in combination with other natural or synthetic gums, as thickening agents for fabric printing paste compositions containing acid dyes. The printing paste is applied in the usual manner, and then the printed goods are heated. The sodium cellulose sulfate content of the paste, upon heating, fixes the acid dye on the printed goods, thereby eliminating the necessity of using acid or acid salts in printing pastes.

Printing paste compositions containing sodium cellulose sulfate, and

Thickened latex coatings with improved properties are obtained by adding to 100 gallons (379 liters) of paint from 1 to 8 lbs. (0.45 to 3.6 kg) of a composition comprising Heteropolysaccharide S-10 and a copolymer of an alkenyl aromatic monomer and an unsaturated acid anhydride.

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Spring Valley, CA, United States of America

Thomas A Lindroth