Pigment and Filler Slurries

UCARCIDE Antimicrobial 750 for Pigment and Filler Slurries Introduction 

UCARCIDE Antimicrobial 750, an EPA-registered material, contains Glutaral USP, a 50-percent aqueous solution o glutaral-dehyde. It is especially effective in controlling bacterial growth in aqueous pigment and filler slurries. 

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Preservatives based on BIT may be used for the in-tank/in-can protection of polymer emulsions, latex paints, pigment and filler slurries, paper coatings, adhesives and other aqueous functional fluids. Because of the heat stability and non-volatility of BIT the preservatives can be incorporated in fluids which are still hot. BIT exhibits no headspace activity. It is compatible with non-ionic and anionic compounds and active in acid and alkaline media. 

As a preservative for industrial fluids, formaldehyde (formalin and paraformaldehyde) is preferably used in cosmetic products and in polymer dispersions (natural and synthetic latex) often in combination with other microbicides. Formaldehyde is listed in the EC list of preservatives allowed for the in-can protection of cosmetics (maximum authorized concentration 0.2%, except for products for oral hygiene 0.1%, prohibited in aerosol dispensers). Percentage of use in US cosmetic formulations 0.11% paraformaldehyde. Oil, fat and wax emulsions, starch and dextrine glues, adhesive dispersions, pigment and filler slurries, thickening solutions and other aqueous formulations containing no proteins can be preserved by the addition of formaldehyde, too in order to... 

Complies with FDA Regulations 176.170 and 176.180 covering use in pigment and filler slurries used in the manufacture of paper and paperboard for food packaging... 

Uses Dispersant for pigments and fillers in lafex paints vise, reducer for latexes, clay slurries, and pigment disps. 

Uses Wetting agent, dispersant for pigments and fillers, stabilizer for emulsion paints, interior and exterior architectural coatings, highly cone, pigment slurries... 

Uses Antimicrobial, preservative for adhesives, coatings, paints, starch, pigment and extender slurries, latexes, antifoam emulsions, inks, textiles, pharmaceuticals, cooling towers preservative, bactericide in cos-metics/toiletries biocide in metalworking fluids, industrial water systems, pulp/paper antiseptic in food-pkg. adhesives antimicrobial preservative for fillers, pigment slurries, starch sizing sol ns., and latex coatings for food-contact paper/paperboard slimicide in food-contact paper/paperboard Features Broad spectrum Use Level 0.01-0.1%... 

To be able to produce a suspension having a controlled solids content, often of more than 70w/w%, special dispersants are required. Without such dispersants, a mixture containing a mineral, such as calcium carbonate, with only 30w/w% water is no longer flowable. Pigment and filler producers have developed highly active polymer systems, especially for the use of mineral slurries in the paper industry, which allow such concentrations to be achieved without destroying the complex chemistry of a paper machine. 

Uses Wetting agent, dispersant for pigments and fillers, stabilizer for emulsion paints, interior and exterior architectural coatings, highly cone, pigment slurries Features Compat. with commercially avail, polymer emulsions Properties YIsh. cl. low-vise, liq. misc. with water in any ratio vise. 20-200 mPa-s ... 

Particle size and surface area play a role in chemical demand required to sufficiently retain pigments within the web. Likewise, dispersants often associated with high solids filler slurries tend to interfere with many conventional retention aid chemistries and should be taken into consideration when grade development strategies are formed. Particle charge, or zeta potential, is often an indicator of the relative ease of retention for many fillers. 

Absorption of C02 in aqueous slurry of lime for the manufacture of precipitated calcium carbonate (which is reused in large quantities as a rubber filler, a pigment, etc.). Here lime is sparingly soluble in water and the reaction occurs between the dissolved carbon dioxide and OH" ions. 

Precipitation technology is not yet very advanced, and many industrial companies experience problems with small crystals that cannot be separated easily. Furthermore, for some purposes, it is necessary to produce very small crystals (e.g., pigments, paper-coating materials, and paper fillers) and, therefore, solid-liquid separation becomes inevitably difficult. In the paper industry, submicron-sized paper-coating agents may be produced in a process in connection to the paper mill so that the suspension is transported as slurry and no filtration is required. If the filtration of small crystals is needed, the problem is the need to be handled by filtration specialists. 

Uses Preservative, bactericide, fungicide, yeast inhibitor for aq. coatings, polymer disps., filler suspensions, pigment slurries, sol ns. and disps. of adhesives and thickeners, concrete additives, detergents, cleaning agents, polishes, etc. 

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