Water outstanding properties

Solubility Readily dispersible in hot or cold water Outstanding Properties ... 

Calcined Anhydrite. Soluble anhydrite, or second-settle stucco, has physical properties similar to those of gypsum plaster. It hydrates to the dihydrate rapidly in water. Its outstanding property is its extreme affinity for any moisture, which makes it a very efficient drying agent (see Desiccants). In ambient moisture-laden air, it readily hydrates to hemihydrate. Soluble anhydrite, under the trade name Drierite, is widely used as a desiccant in the laboratory and in iadustry. A small amount is also used as an insecticide carrier. Small amounts of soluble anhydrite are unintentionally produced in most commercial calciners during hemihydrate production. 

Water is also so abundant and so familiar to everybody that it is difficult to appreciate that it has many outstanding properties some of its chemical and physical properties are remarkably different from those of most other substances with which it would be expected to share certain properties. For example ... 

Poly(organosiloxane)s have a number of outstanding properties such as thermal and oxidative stability, water and chemical resistance, electric insulating capacity, selective permeability to gases, and biocompatibility. 

Poiymers which are 100% acrylic are known for their outstanding exterior durability properties, as well as excellent alkali resistance and overall high performance. Styrene is generally lower-cost than many other monomers, so styrene-acrylics are lower in cost than all acrylics but have poorer exterior durability because styrene is a UV absorber and degrades. Styrene-acrylics, do, however, generally have very good water-resistance properties due to their hydrophobicity. Styrene acrylics are popular in some areas of Europe, Asia, and Latin America. Vinyl acetate is also somewhat lower in cost, so these polymers are popular for interior paints, particularly in the United States, where exterior durability and alkali resistance are not performance issues. 

Fluorinated polymers are considered high value-added materials, due to their outstanding properties which open up various applications [1-9]. Such polymers exhibit high thermostability and chemical inertness, low refractive index and coefficient of friction, good water and oil repellence, low surface energy and valuable electrical properties. In addition, they are non-sticky and resistant to UV, ageing, and to concentrated mineral acids and alkalies. 

The rubbery character and particular physical and chemical properties of polyisobutene stem from its paraffinic origins. Its outstanding properties are its low glass transition temperature, very low water vapor permeability and resistance to many chemicals. At room temperature polyisobutene is resistant to dilute and concentrated mineral acids and bases, as well as hydrogen peroxide. 

Some of the outstanding properties of this water-soluble synthetic resin are ... 

They have outstanding properties which are of great value for catalysis, such as strong Bnansted acidity [8], ability to catalyze reversible redox reactions under mild conditions [9], and high solubility in water [10]. In most applications, they are used as acid, redox, and bifunctional catalysts in homogeneous and heterogeneous systems. 

Polyurethane rubbers, in general, and the Vulkollan-type rubbers, in particular, possess certain outstanding properties. They usually have higher tensile strengths than other rubbers and possess excellent tear and abrasion resistance. The urethane rubbers show excellent resistance to ozone and oxygen (in contrast to diene rubbers) and to aliphatic hydrocarbons. However, they swell in aromatic hydrocarbons and undergo hydrolytic decomposition with acids, alkalis, and prolonged action of water and steam. 

According to the above two approaches, the outstanding property of water that counter-acts the solubility of non-polar solutes is the large value of the relevant property of water relative to those of the solutes the solubility parameter 5w and the surface tension pw- These are consequences of the hydrogen bonded network of the water, discussed above (Sects 1.1.2. and 1.1.3.). 

With the expansion of the textile industry, other surfactants besides soap began to achieve importance. For example, industry a surface-active product, produced by sulfonation of castor oil, possesses outstanding properties. Under the name of turkey red oil , it is still in use today. It was found that the sulfuric acid semi-ester of the OH-group of ricinoleic acid was the surface-active moiety in this material. At first, the carboxylic group of the ricinoleic acid was transformed into an ester to avoid forming insoluble salts from the water hardness. Later, Bertsch logically arrived at the use of fatty alcohols instead of ricinoleic acid as suitable hydrophobic starting materials. 

Outstanding property fire retardant action, water resistance ... 

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