The progress in materials research including dentin bondings, impression materials, luting cements, glass ionomers, glass carbomers
, composites, and ceramics clearly requires an improved understanding in multiple disciplines, as well as the development of new design methodologies in order to obtain better properties in biologic performance and better biocompatibility .
Typical solids dispersed using the SLIM include fumed silica, CMC, guar gum, carbon black, carrageenan, xanthan gum, talc, alginates, pectin, titanium dioxide, calcium carbonate, starch, clays, alumina, carbomers
, sugar, salts, dye powders and other additives or fillers.
Typical solids dispersed using the SLIM include fumed silica, CMC, carbon black, graphite, talc, alginates, pectin, titanium dioxide, calcium carbonate, starch, clays, alumina, carbomers
, salts, dye powders and other additives or fillers.
"Investigation of rheological properties of gels formed by carbomers
," Pharmakom [Farmakom], in Russian, No.2, pp.52-61
are synthetic polymers with high viscosity and good ocular surface retention time, but they tend to sting and blur vision.
are not effective thickeners/stabilizers and the formula may experience stability issues if they are incorporated.
Ytron[R] instantaneously disperses the most difficult to disperse powders, such as carbomers
, gums, stabilizers and polymers at concentrations up to 20% by weight in a single pass.
Powders like fumed silica, CMC, guar gum, carbon black, carrageenan, xanthan gum, talc, pectin, flours, clays, carbomers
and other rheology modifiers can now be mixed into liquids quickly and economically, requiring no filtering step after the mixing operation.
Generating a near-perfect vacuum allows concentrations up to 20% by weight to be produced in a single pass, even with difficult products such as hydrocolloids, cellulose gums and carbomers
. No dispersion aids such as pre-heating or the addition of solvents is required.
By improving the performance properties of traditional carbomers
, the next-generation carbomer
meets the demands of an ever-changing personal care landscape.
Acryloyl taurate thickeners have improved resistance to salt but, according to Shiseido scientists, these polymers have a sticky feel which can be ameliorated by copolymerizing acrylamidomethylpropane sulfonate with hydroxyethyl methacrylate and an appropriate crosslinker, (10) Carbomers
are crosslinked polyacrylic add prepared by precipitation polymerization.
(13) Polymeric thickeners based on acryloyldimethytaurine and its salts were introduced into the market in the 1990s (14) (Aristoflex AVC from Clariant) and they were found to offer better thickening efficiencies than conventional carbomers
in acid and salt-containing compositions.