Viscosity modification

Plastisol viscosity modifiers Fatty alcohol ethoxylates Sodium dialkyl sulphosuccinates Viscosity modification... 

Viscosity modifications, concrete, drilling muds Softening and curing leather... 

As a variety of methods are available for modifying the emulsifying properties of commercial lecithin, the potential for improved, tailor-made, functional products is unlimited. The main functional properties are emulsification, antispatter, instantizing/wetting/dispersing, release/parting, viscosity modification, and baking applications. 

Confections. There are three major specific properties for lecithin in confections emulsification (e.g., caramels), anti-stick/release properties, and viscosity modification (e.g., chocolate) (175). None of these properties stand alone. For example, emulsification in caramels will influence shelf life and texture. In chocolate, viscosity modification will alter production costs and texture of the finished product. 

Pure epoxy resins, so-called basic resins, are unsuited to building applications because of their high viscosity. Modifications are necessary to achieve the required viscosity, wettability, carbonate resistance, curing rate, cost reduction and numerous other properties. However, the modifiers must be chosen so as not to impair the other valuable attributes of the epoxy resins. For example volatile solvents are unsuitable for thick coatings, because any solvent retained in the cured system will reduce the mechanical and thermal properties and the corrosion resistance. The specific property needs for a particular application may be tailored to each system to maximise the remarkable potential of epoxy resins (Dow Chemical Company, undated c). 

Liquid crystal structures are important not only in the viscosity modification of surfactant solutions, but also in the stabilization of foams and emulsions, in detergency, in lubrication (Boschkova, 2002), and in other applications. 

G. Grover, H. Liang, and C.K. Huang, Effect of slurry viscosity modification on oxide and tungsten CMP, Wear, 212, 10-13, 1998. 

Organic Peroxides Viscosity modification of recyclate is one focus of R D, Modem Plastics International, 23,9, pp. 48-53 (1993). 

Polyelectrolyte and non-polyelectrolyte acrylamide random copolymers and graft copolymers of dextran with acrylamide were synthesized to evaluate the effects of polymer composition and structure on viscosity modification and solution behavior in water and brine. Polymer solution rheological behavior and precipitation properties were measured. 

Random copolymers of acrylamide with N,N-dimethylacrylamide and with N,N-diethylacrylamide were prepared as illustrated in reactions (7) and (8). The respective copol3nners, PAMDMAM and PAMDEAM, have been synthesized to elucidate more fully the role of hydrogen-bonding and N-substitution on viscosity modification. These polymers were synthesized using potassium persulfate initiators in water or 30% methanol/water solutions. Reaction conditions and monomer feed ratios are given in Table 2. The resulting copolymers were purified by precipitation into acetone followed by vacuum drying at 50 C for 60 hours. 

Y. Moon, D.A. Domfeld, The effect of slurry film thickness variation in chemical mechanical polishing (CMP), Proc. Am. Soc. Precision Eng. 18 (1998) 591—596. G.S. Grover, H. Liang, S. Ganeshkumar, W. Foitino, Effect of slurry viscosity modification on oxide and tungsten CMP, Wear 214 (1) (1997) 10—13. 

Viscosity modification could be achieved by either blending the PCR with a virgin resin or by altering the temperature profile of the extruder. However, modifying a temperature profile is often limited in its effectiveness and may cause other problems such... 

Comparing kinetics of kinematical viscosity reduction and chemiluminescence intensity changes (Fig. 23.6) shows that the intensity of luminescence variations inconsiderably changes during the initial period of rapid viscosity modifications. Thus, macromolecules of polyvinyl alcohol are first destructed and luminescence emitters are formed in the process of further oxidative transformations of the oligomers. 

As a result, viscosity modification, through the use of various soluble polymeric thickeners, represented the first attempt to modify the liquid properties of cyanoacrylates. Thickeners and fillers must be compatible with the cyanoacrylates and must not set off the easily triggered anionic cure. Polymers which have been used to increase the base viscosity of the monomers include polymethacrylates (the most common), poly acrylates, poly cyanoacrylates, poly vinylacetates, baked polyacrylics, poly lactic acid, cellulose nitrates and other esters such... 

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