Hercules Corporation

Solenis Technologies, L.p.

Upm-kymmene Corporation

Solenis Technologies Cayman, L.p.

John C. Harrington

Robert A. Gelman

Abraham K Vaynberg

John C Harrington

Robert Alan Gelman

Fushan Zhang

William S Carey

Richard Lee Brady

Frank J Sutman

Brian Walchuk

Robert A Gelman

Davit E Sharoyan

Kate Marritt Lusvardi

Mingxiang Luo

Martha G Hollomon

K Abraham Vaynberg

Sujan Singh

William Sean Carey

Brian L Walchuk

A method of increasing chemical efficiency of chemical additives in a papermaking system includes the steps of providing thick stock pulp comprising soluble lignin, process water, and at least about 2% by weight of cellulosic fiber based on total weight of thick stock pulp, and adding at least one laccase enzyme and at least one organic polymer to the thick stock pulp to reduce the amount of soluble lignin therein. The organic polymer is chosen from cationic polymers, non-ionic polymers and combinations thereof.

Chemical efficiency increase in papermaking process

A method of increasing the drainage performance of a pulp slurry during the manufacture of paper products by adding (a) at least one microfibrillated cellulose and (b) at least one associative polymer or at least one branched or crosslinked copolymer to the pulp slurry. This addition occurs before the dewatering step where the pulp slurry is formed into a fibrous mat.

Method of increasing drainage performance of a pulp slurry during manufacture of paper products, and products therefrom

A method of improving retention and drainage in a papermaking process is disclosed. The addition of an associative polymer, a poly(vinylamine) and optionally a siliceous material to the papermaking slurry to improve retention and drainage is disclosed. Additionally a method to improve retention and drainage comprising addition of an organic microparticle, a poly(vinylamine) and optionally a siliceous material to the papermaking slurry is disclosed. A composition comprising an associative polymer, and a poly(vinylamine) and optionally further comprising cellulose fiber is disclosed.

Retention and drainage in the manufacture of paper

The present invention describes polymeric retention and drainage aids for cellulosic fiber compositions and methods of use of the same.

Retention and drainage aids

A papermaking method and a composition which utilize, as a drainage aid, a water-soluble anionic copolymer prepared via a water-in-oil polymerization technique that, absent a cross-linking agent, is characterized by a Huggins' constant (k') determined in 0.01M NaCl greater than 0.75 and a storage modulus (G&#x2032;) for a 1.5 wt. % actives polymer solution at 4.6 Hz greater than 175 Pa.

Anionic copolymers prepared in an inverse emulsion matrix

A method to invert an inverse emulsion water compatible polymer product using a combination of surfactants that have specific chemical structures is disclosed. A combination, or blend, of two or more surfactants provides for an effective breaker system. The blend of surfactants is more effective than the individual surfactants.

Inversion of inverse emulsion polymers

Anionic copolymers prepared in an inverse emulsion matrix and their use in preparing cellulosic fiber compositions

Clip on pen and pencil holder

Growing community of inventors

Newark, DE, United States of America

John C Harrington