Solenis Technologies, L.p.

Ashley Hawkins Lewis

Mark T Crisp

Qu-Ming Gu

Richard J Riehle

Clement L Brungardt

Michael A Evans

Jeffrey H Peltier

Bryan K Spraul

Josette Servals Huynh-Ba

Patrick Kovacs

Mark Tracey Crisp

A process is disclosed for making paper having improved filler retention and opacity. The process includes the step of adding Additive A and Additive B to a slurry in a wet end of a paper machine wherein the slurry comprises pulp and a filler. Additive A is a wet strength agent. Additive B is an anionic polymer having a charge density from about &#x2212;3000 to about &#x2212;7000 ueq/g on a dry basis when measured in a buffer having a pH of about 6. Additive B also has a weight average molecular weight of from about 150,000 to about 1,000,000, Daltons.

Process for making paper with improved filler retention and opacity while maintaining wet tensile strength

Disclosed herein are hydrophobic vinylamine-containing polymers useful as papermaking performance additives for enhancing paper softness with little or no negative effect on paper dry strength properties. The hydrophobic vinylamine-containing polymers are produced by incorporating hydrophobic functional property into primary amine moiety of the vinylamine-containing polymers via reactions with reactive hydrophobes. The hydrophobically modified vinylamine-containing polymers can be further used as base polymers for polymerization with a vinyl monomer by free radical initiated polymerization. The compositions of those hydrophobic vinylamine-containing polymers have shown improved softness, reduced coefficient friction to paper products while maintained or improved dry strength properties of the paper products.

Hydrophobic vinylamine-containing polymer compositions and their use in papermaking applications

Provided is a process for improving the performance of wet-strength resins, such as polyaminopolyamide-epichlorohydrin resins, by treatment with a base to increase molecular weight to provide improved wet strength.

Process to improve performance of wet-strength resins through base activation

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Wilmington, DE, United States of America

Ashley Hawkins Lewis