Ecolab USA Inc.

Nalco Company

Dorota Smoron

Shawnee M Wilson

Weiguo Cheng

Gary S Furman, Jr

Katherine M Broadus

Mei Liu

David J Castro

Gary Samuel Furman, Jr

Zhiyi Zhang

Katherin M Broadus

A method of preparing a stable dispersion of flocculated filler particles for use in papermaking processes comprises use of an anionic first flocculating agent to an aqueous dispersion of filler particles, followed by addition of a second anionic flocculating agent to the dispersion and further optional shearing of the resultant filler flocs to the desired particle size resulting in shear resistant filler flocs with a defined and controllable size distribution.

Anionic preflocculation of fillers used in papermaking

The invention provides methods and compositions for increasing the strengthening effect of a starch coating on paper. The method involves contacting the starch with a synthetic polymer before the starch is cooked. This changes how the starch gelatinizes and how the polymer gets distributed on the paper resulting in greater paper surface strength.

Method of increasing paper surface strength by using acrylic acid/acrylamide copolymer in a size press formulation containing starch

A method of preparing a stable dispersion of flocculated filler particles for use in papermaking processes comprises use of microparticle prior to, simultaneous to, and/or after addition of a first flocculating agent to an aqueous dispersion of filler particles, followed by addition of a second flocculating agent to the dispersion and further optional shearing of the resultant filler flocs to the desired particle size resulting in shear resistant filler flocs with a defined and controllable size distribution. In addition, a neutralizing coagulant can be added to the dispersion to partially or completely neutralize the charge of the filler before the microparticle and/or the first flocculating agent is added.

Preflocculation of fillers used in papermaking

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Hoffman Estates, IL, United States of America

Dorota Smoron