Henkel Corporation

Geo Specialty Chemicals, Inc.

Ecc International Limited

Imerys Pigments, Inc.

Imerys Minerals Limited

Geo Speciality Chemicals, Inc.

Jose M Rodriguez

Anthony B Cook

Gail M Howell

Nancy S Clungeon

Kuan-Ting Wu

John J Palmer

Stephen A Fischer

Jonathan Stuart Phipps

Paul A Rey

Ian Stuart Bleakley

Rudolph F Klima

Steven M Fortier

Gregory J Flynn

Sheila Deveneaux

Christy A Richards

Barbara Balos

John Krasniewski

Kevin Snowden

James V Patterson

Richard Gerke

Hannu Olavi Ensio Toivonen

Kevin J Snowden

Zhentao He

A new composite material which is useful as a pigment in paper making or paper coating is produced by precipitating a white insoluble pigment compound, eg calcium carbonate, in an aqueous suspension containing a mixture of fine particulate material eg titanium dioxide particles and fibers, eg cellulosic fibers. These suspended solids in the mixture are derived from separate stocks and added together to produce the composite pigment material. The new material is a bonded matrix of the fibers and the white pigment compound having particles of the fine particulate material, eg TiO , dispersed and bonded within the matrix. The new material may exist in the form of particles in dry or wet form which may be further treated in a known way prior to use in paper making or paper coating. Use of the new material allows expensive fine particulate material such as TiO particles to be better retained in a paper making composition whilst at the same time avoiding the known problem of agglomeration or 'crowding' of the fine particles which is known to affect adversely the optical properties of the composition produced using the fine particles.

Pigment materials and their preparation and use

A lubricant additive suitable for combination with an aqueous-based paper or paper board coating mixture wherein the lubricant additive is selected from the group consisting of a polyoxyalkylene mono- and di-ester of phosphoric acid, a polyoxyalkylene mono- and di-ester of a phosphoric acid salt, and a mixture thereof.

Lubricants for paper coatings

An improved form of calcium carbonate which is acid resistant to enable its use as a filler material in the making of neutral to weakly acidic paper, and a process for producing this acid-resistant calcium carbonate is provided. This acid-resistant calcium carbonate composition comprises calcium carbonate and at least about 0.1% to about 25% based on the dry weight of the calcium carbonate, of sodium silicate, together with at least 0.1% to about 25 percent, based on the dry weight of the calcium carbonate, of a weak acid, such as phosphoric acid, formic acid, fluoroboric acid, polyacrylic acid, or alum, or a mixture of weak acids, such as phosphoric acid and polyacrylic acid.

Stabilized calcium carbonate composition using sodium silicate and one

A method for producing a high solids slurry of an acid-resistant precipitated calcium carbonate for shipping purposes is disclosed. A low solids of about 18 wt. % to 20 wt. % solids slurry is treated with a chemical additive, such as sodium aluminate, in order to impart acid resistance to the calcium carbonate, and is dewatered to form an intermediate solids slurry of about 44 wt. %. This intermediate solids slurry is then diluted with a fraction of the low solids slurry which was treated with the chemical additive, in order to bring the intermediate slurry to a final high solids slurry of about 35 wt. %. Acid is added to the final product slurry in order to reduce the pH of the final slurry to within a buffering range of about 7.0 to 6.5. The final product slurry of about 35 wt. % comprises an acid-resistant calcium carbonate composition with a pH of about 7.0 which can be shipped for ultimate use when making paper under neutral pH conditions. The final product slurry has a Brookfield viscosity ranging from 200 to 500 centipoise at 100 rpm.

Method for producing high solids aqueous acid-resistant calcium

An improved form of calcium carbonate which is acid tolerant to enable its use as a filler material in the making of neutral to weakly acid paper, and a process for producing this acid tolerant calcium carbonate are provided. This acid tolerant calcium carbonate comprises a mixture of calcium carbonate with at least about 0.1 percent, based on the dry weight of the calcium carbonate, of sodium aluminate together with at least about 0.1 percent, based on the dry weight of the calcium carbonate, of one or more weak acids.

Acid tolerant calcium carbonate composition and uses therefor

The tensile strength properties of paper are improved by adding to paper stock a resin composition comprising a water-soluble polymer containing a polyhydric alcohol such as sorbitol in the backbone of the polymeric molecule.

Dry strength resin compositions

A process for deinking a printed wastepaper pulp slurry comprising: (a) adding to a printed wastepaper pulp slurry a deinking composition consisting essentially of a nonionic ethoxylated and propoxylated surfactant of the formula (I):

Method for de-inking printed waste paper by the washing process using an

Deinking of printed paper is accomplished by repulping and defibering the printed paper in an alkaline aqueous medium containing a deinking composition to form an ink and pulp medium. The deinking composition is an alkoxylated lanolin derivative containing from about 55 to about 80% by weight of ethylene oxide and from about 15 to about 30% by weight of propylene oxide, based on the weight of the alkoxylated lanolin derivative.

Alkoxylated lanolin derivatives as deinking agents

A collector composition for deinking printed waste paper containing a mixture of (a) the reaction product of an epoxidized derivative of a C.sub.10-22 carboxylic acid and an alkoxylated polyhydroxy alcohol or an alkoxylated derivative of a C.sub.10-22 carboxylic acid, (b) ethoxylated soya glyceride, and (c) a polyol.

Ethoxylated soya glycerides with glycols as deinking collector modifiers

A defoamer composition made from the reaction product of an epoxide containing composition selected from epoxide fatty acids, epoxide vegetable oils and mixtures thereof and at least one secondary compound selected from the group consisting of fatty acids and alkoxylated derivatives thereof, alkoxylated polyols, alcohols, alkoxylated alcohols, alkylphenols, alkoxylated alkylphenols, alkylamides, alkoxylated alkylamides, acetylenic glycols, alkoxylated acetylenic glycols, polybasic acids, alkylene oxides, organo silicones and polymers thereof, and methods of using the same especially for defoaming black liquor produced in the pulp and paper industry.

Defoamer composition and method of using the same

Process for repulping wet strength paper containing at least one wet strength resin in which initial breakdown of the paper is conducted at a first pH and the substantial completion of the conversion to fibers is conducted at a second pH which is higher than the first pH.

Process for repulping wet strength paper

Wastepaper containing printing ink is refined in the presence of the reaction products of castor oil with an alkoxylated fatty acid, alcohol, amine, amide, phosphate ester, polyhydroxy alcohol, or sorbitan, and the detached printing ink particles are subsequently removed from the paper stock suspensions by flotation or washing.

Deinking wastepaper using reaction products of castor oil with an

This invention relates generally to insolubilizers for use with binders in paper coating compositions. There is provided a process for preparing both an insolubilizer and paper coating composition containing the insolubilizer and a binder which, when applied onto paper products, significantly enhances their wet-rub resistance. The insolubilizer is prepared by: (a) forming a glyoxal-urea adduct by reacting from about 1.0 to about 4.0 moles of glyoxal with about 1.0 mole of urea, at an elevated temperature, (b) cooling the glyoxal-urea adduct to room temperature, (c) adding from about 0.5 to about 2.0 moles of free glyoxal to the glyoxal-urea adduct to form an oligomer, and (d) adjusting the pH of the oligomer to from about 5 to about 7.

Insolubilizers for binders in paper coating compositions

An apparatus and method is provided wherein the foam inhibiting effectiveness of defoaming and antifoaming additives on various types of foamable liquid mediums is measured. A single generally cylindrical foam cell having openings at both ends is provided wherein an interchangeable foam cell insert having varied geometry is longitudinally disposed within the foam cell. The foam cell insert is provided with a plurality of centralizer walls extending into the foam cell with an agitator member being carried by the centralizer walls. Foamable liquid medium is introduced into the foam cell and recirculated therethrough to form a dynamic fluid-flow system. As the liquid medium passes through both the foam cell and the foam cell insert, it comes into contact with the agitator member carried by the centralizer walls of the foam cell insert forming foam which accumulates in the foam cell. After a sufficient amount of foam is formed, a defoaming or antifoaming agent is introduced into the foam cell, and its effect on the level of foam present in the foam cell is measured. The interchangeable foam cell inserts are of varying lengths and carry varyingly configured agitator members, so that depending on whether a high or low foaming liquid medium is introduced, an appropriate foam cell insert may be chosen and inserted into the foam cell. The interchangeable foam cell inserts allow for a single foam cell to be used for measuring purposes thus decreasing the cost and potential down-time associated with such testing.

Growing community of inventors

Fort Mill, SC, United States of America

Jose M Rodriguez