Solids, two-component

Example 6. High Solids, Two-Component, Clear, Aliphatic, Polyurea Coating. This example of an aliphatic, 100% urea coating utilizes polyaspartic esters as reactive diluents (see Section 4.2.3). These compounds allow fine tuning of reactivity and physical properties and eliminate the need for viscosity-reducing solvents. 

High-solids, two-component, clear, aliphatic, polyurea coating, preparation of, 252-253 High-temperature annealing, 220 High-temperature bulk polyesterifications, 61-74... 

Epoxy coatings. A high solids two-component epoxy coating was prepared (Ciba Geigy Araldiate 6010 epoxy/Polyamide 840 hardener) and spray-applied to CRS and aluminum (Table 8). The coating was cured at 25°C and 50% relative humidity for 7 days. 

An important difference between particulate solids and emulsions is that in the solids two components can percolate the system at the same time, that is, two components can act as the outer phase simultaneously. In this case the system is known as a bicoherent system. 

Calculate the degrees of freedom of the mixed-feed triple-effect evaporator shown below. Assume the steam and all drain streams are at saturated conditions and the feed is an aqueous solution of dissolved organic solids (two-component streams). Also, assume that all overhead streams are pure water vapor with no entrained solids (one-component streams). 

Toxicology Corrosive TSCA listed Storage Moisture-sensitive store under nitrogen Uses Reactive diluent used in high-solids two-component polyurethane coatings used as partial or total replacement for the polyol component, reduces VOC lowers vise., improves weathering performance Manuf/Distrib. Aldrich... 

Butylene carbonate Ethylene carbonate diluent, reactive PU coatings, high-solids two-component... 

Reactive— liquid components chemically react with each other to form a solid (two-component epoxy adhesives, cyanoacrylates or super glues react with water, some adhesives react on exposure to light or radiation)... 

The adsorption of detergent-type molecules on fabrics and at the solid-solution interface in general shows a complexity that might be mentioned briefly. Some fairly characteristic data are shown in Fig. XlIl-15 [242]. There is a break at point A, marking a sudden increase in slope, followed by a maximum in the amount adsorbed. The problem is that if such data represent true equilibrium in a two-component system, it is possible to argue a second law violation (note Problem Xni-14) (although see Ref. 243). 

System in which the solid phases consist of the pure components and the components are completely miscible in the liquid phase. We may now conveniently consider the general case of a system in which the two components A and B are completely miscible in the liquid state and the solid phases consist of the pure components. The equilibrium diagram is shown in Fig. 1,12, 1. Here the points A and B are the melting points of the pure components A and B respectively. If the freezing points of a series of liquid mixtures, varying in composition from pure A to pure B, are determined, the two curves represented by AC and BC will be obtained. The curve AC expresses the compositions of solutions which are in equilibrium, at different temperatures, with the solid component A, and, likewise, the curve BC denotes the compositions... 

System in which the two components form a continuous series of solid solutions. In all the preceding examples the individual components (A or B or A By) form separate crystals when solidifying from the melt. There are, however, a number of examples of the separation of a homogeneous solid solution of A and B (or A and A By, etc.). 

Two other types of equilibrium curves are occasionally encountered with the system of two components forming a continuous series of solid solutions. These are shown in Figs. 1,16, 3 and 1,16, 4. In the former the freezing or melting curve passes through a minimum (examples p-chloroiodobenzene, m.p. 57° - p-dichlorobenzene, m.p. 53° naphtha-... 

There are two components the three phases (two solids and one liquid) coexist. So f = 0, that is, the three phases can coexist only at a point (the eutectic point). 

The phase-diagram (temperature vs concentration) for a eutectic two-component alloy shows at low temperatures a central two-phase region and two solid one-phase regions at low and high relative concentrations. At the eutectic temperature the liquid phase at an intermediate concentration can all of a sudden coexist with the two solid phases. Upon further increase of temperature, the liquidus lines open up a V-shaped liquid... 

Solid-state photoreactions of heterocycles in two-component crystals 98S1. 

Solid-state photoreactions in two-component crystals with formation of heterocycles 98S1. 

Solid-state C NMR techniques have been applied to the characterization of the different phases of several polybibenzoates [25,30], including P7MB, PDTMB and PTEB. The last two polymers offer the advantage of the stability of the mesophase at room temperature. The spectra corresponding to the pure mesophase of these samples only exhibited a broad component, while the spectra of the annealed samples were separated into two components crystal and noncrystal. The shapes of the mesophase and the noncrystal components are very similar, and only modest variations in the relaxation times were observed between these two components. The degree of crystallinity of these samples was determined... 

Amorphous alloys stable at ambient and higher temperatures consist of at least two components without any long-range atomic order. They are produced by a variety of constituents from the gas, liquid and aqueous phases. Vitrification of metal surfaces is also caused by destruction of the long-range atomic order in the surfaces of solid metals. 

Where heat transfer is taking place at the saturation temperature of a fluid, evaporation or condensation (mass transfer) will occur at the interface, depending on the direction of heat flow. In such cases, the convective heat transfer of the fluid is accompanied by conduction at the surface to or from a thin layer in the liquid state. Since the latent heat and density of fluids are much greater than the sensible heat and density of the vapour, the rates of heat transfer are considerably higher. The process can be improved by shaping the heat exchanger face (where this is a solid) to improve the drainage of condensate or the escape of bubbles of vapour. The total heat transfer will be the sum of the two components. 

The components of a solution are the pure substances that are mixed to form the solution. If there are two components, one is sometimes called the solvent and the other the solute. These are merely terms of convenience. Since both must intermingle to form the final solution, we cannot make any important distinction between them. When chemists make a liquid solution from a pure liquid and a solid, they usually call the liquid component the solvent. 

If the system consists of the three phases with two components solid salt + solution + vapour we obtain KirchhofFs equation (cf. 169). ... 

Double salts and solid solutions exist as a single phase, but contain two components. Such reactants incorporate certain features in common with two phase systems which interact on heating (discussed in Chap. 5) in... 

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