Viscous agent

It has been suggested, perhaps thoughtlessly, that dispersion of slippery viscous agents in the direction of rioters would impair their co-ordinated movements and make it difficult for them to undertake malicious tasks. However, not only would there be the likelihood for uncontrolled physical accidents, but also problems in the control of motorized vehicles in the area, including those of the security forces. Additionally, in public areas, there would be a need for prompt street decontaminations by environmentally acceptable methods. 

When removing high viscous agents, cohesion of a large substance mass can give rise to an abrupt motion, which, to be avoided (and to avoid e.g. iridal pigment layer detachment) necessitates an irrigation/aspiration relationship check as well as aspiration power (Hiitz et al., 1996). 

Miyauchi S, Iwata S. Biochemical studies on the use of sodium hyaluronate in the anterior eye segment. IV. The protective efficacy on the corneal endothelium. Curr Eye Res 1984 3 1063-1067 Miyauchi S, Iwata S. Evaluations on the usefulness of viscous agents in anterior segment surgery. I. The ability to maintain the deepness of the anterior chamber. J Ocular Pharm 1986 2 267-274 Miyauchi S, Iwata S. Biochemical studies on the use of sodium hyaluronate in the anterior eye segment. II. The molecular behavior of sodium hyaluronate injected into anterior chamber of rabbits. Curr Eye Res 1987 3 611-617... 

Various media, woven and nonwoven fabrics, paper, wire mesh and even membranes may be employed for dry panel filters. The most favoured materials are synthetic fibres and glass fibre, in a pad or mat, in multi-layer or pleated form. It is becoming increasingly common practice to coat the media with a viscous agent to ensure high dust retention. 

Chemical Stabilization. The chemistry of the system determines both the rate at which the polymer phase is formed and the rate at which it changes from a viscous fluid to a dimensionally stable cross-linked polymer phase. It also governs the rate at which the blowing agent is activated, whether it is due to temperature rise or to insolubilization in the Hquid phase. 

Tamarind kernel powder is insoluble in cold water, but upon heating forms thick viscous coUoidal dispersions at relatively low concentrations (2—3%). Upon drying, elastic films are formed. Tamarind seed polysaccharide is used as a low cost textile sizing agent in India. 

Other. A large variety of additives are used in paper-coatiag colors primarily to modify the physical properties of the colors (102). At high soHds concentrations in water, mineral pigment particles tend to associate and form viscous pastes. Dispersants (qv) are used to prevent this and to provide low viscosity slurries. Common dispersants include polyphosphates and sodium polyacrylate [9003-04-7]. Various water-soluble polymers are added to coatiag colors and act as water-retention agents and as rheology modifiers. 

Deflocculation and Slurry Thinning. Sihcates are used as deflocculants, ie, agents that maintain high sohds slurry viscosities at increased sohds concentrations. Soluble sihcates suppress the formation of ordered stmctures within clay slurries that creates resistance to viscous flow within the various sytems. Laboratory trials are necessary, because the complexity of the systems precludes the use of a universal deflocculant. Sihcates are employed in thinning of limestone or clay slurries used in the wet-process manufacture of cements and bricks, clay refining, and petroleum drilling muds (see also... 

The polymeric acyl titanate esters are viscous Hquids or waxes that are soluble ia hydrocarbon solvents and can be used as Ti02-dispersiag agents, water-repellent agents for textile fabrics, and mst inhibitors for steel. 

This resin, usually a viscous Hquid, is mixed with fillers, pigments, and a curing agent. The mix is then appHed to the substrate, and cure is obtained in a few hours. The product is strong, tough, and resistant to chemicals and abrasion. It is used for industrial and other doors subject to hard water. The use of epoxy resins for this purpose is only a small fraction of its total use. 

---