Abstract:
Methods to predict the rheological properties of composition comprising a filler in a matrix are described. The present invention further involves determining the difference between the work of cohesion and the work of adhesion for a filler and a matrix in order to quantitatively predict the rheological properties of the system, such as yield point. The ability to predict such properties has numerous advantages. The present invention further relates to a rheological master curve and a method to produce the curve which permits one to predict a rheological property of a composition comprising a filler in a matrix based on the particular polymer used and the particular filler used. Also disclosed is a method of method of choosing a filler to achieve a desired rheological property using the rheological master curve described herein.
Abstract:
The present invention relates to a method of providing product consistency of a particulate material or the product containing the same, by maintaining at least one absorptometry value of the particulate material within a target range. The method may be used as a QA/QC method to insure product consistency.
Abstract:
The invention provides an aqueous dispersion comprising fumed silica particles, colloidal silica particles, and water. The fumed silica particles have a BET surface area of about 70 to about 140 m /g, and the colloidal silica particles have a BET surface area of about 110 to about 150 m /g. Also, the total amount of silica in the dispersion is about 35% to about 60% by weight, and the fumed silica particles comprise about 25% to about 80% by weight of the total amount of silica in the dispersion. The invention also provides a coating composition and a recording medium incorporating the inventive dispersion.
Abstract:
The invention provides a method of preparing a dispersion of a fumed metal oxide in a liquid carrier comprising the following sequential steps: (a) providing a liquid carrier at a pH that effects dissolution of the metal oxide at a rate the same as or greater than the metal oxide dissolution rate in water at a pH of about 8, (b) mixing with the liquid carrier, in any order, one or more aliquots of both a fumed metal oxide and a metal ion source to form a dispersion, such that the dispertion does not coagulate, and (c) optionally adjusting the pH of the dispersion to the pH of the liquid carrier in step (a). The method allows for the preparation of the dispersion to be done with a high solids loading and at a high pH. Furthermore, the dispersion can have a shelf-life of at least about 1 hour or more at 25 DEG C.
Abstract:
Carbon blacks which are useful in a variety of polymer compounds including ABS compounds are described, as well as methods of making the carbon blacks and polymer compounds. The carbon blacks provide desirable jetness and impact strength, as well as good dispersion in a polymer.
Abstract:
PROBLEM TO BE SOLVED: To provide a high-surface area carbon black that can be preferably readily dispersed in polymers, such as ABS, to attain an acceptable level of various mechanical properties (such as impact resistance) and surface appearance.SOLUTION: Carbon blacks which are useful in a variety of polymer compounds including ABS compounds are described, as well as methods of making the carbon blacks and polymer compounds. The carbon blacks provide desirable jetness and impact strength, as well as good dispersion in a polymer.
Abstract:
PROBLEM TO BE SOLVED: To provide a method of manufacturing a stable fumed metal oxide dispersion having a high solid content and a high pH. SOLUTION: This method of manufacturing the fumed metal oxide dispersion in a liquid carrier contains following continuous steps: (a) preparing a liquid carrier having a pH at which a metal oxide dissolves at a dissolving rate not smaller than that of the metal oxide dissolving in water at a pH of about 8; (b) forming a dispersion which does not solidify when for both the fumed metal oxide and a metal ion source, each not less than 1 aliqot is mixed with the liquid carrier in any order; and (c) arbitrarily regulating the pH of the dispersion to the pH of the liquid carrier at the step (a). A dispersion having a high solid content and a high pH is obtained by this method, and the dispersion is able to have a storage life of at least one hour at 25°C. COPYRIGHT: (C)2010,JPO&INPIT