Coating, glue

Commercial casein is usually manufactured from skim milk by precipitating the casein through acidification or rennet coagulation. Casein exists in milk as a calcium caseinate-calcium phosphate complex. When acid is added, the complex is dissociated, and at pH 4.6, the isoelectric point of casein, maximum precipitation occurs. Relatively little commercial casein is produced in the United States, but imports amounted to well over 150 million lb in 1981 (USDA 1981C). Casein is widely used in food products as a protein supplement. Industrial uses include paper coatings, glues, plastics and artificial fibers. Casein is typed according to the process used to precipitate it from milk, such as hydrochloric acid casein, sulfuric acid casein, lactic acid casein, coprecipitated casein, rennet casein, and low-viscosity casein. Differences... 

Monosulf. [Henkd/O anic Plods.] Sul-fated castnr oil penetrant emulsifier, dyeing assistant fatliquor, plasticizer for textiles, leathers, paper coatings, glues, latex. 

Films, coatings, glues, electric insulation, varnish, fibrous materials, sealing, structural and antifrictional parts. 

Paint coats, glues, sealants, potting compounds, friction parts, electric insulation, very strong structural articles... 

Products and Uses A nutritious milk protein containing all the essential amino acids. Used in a wide variety of products including cheese, interior paints, adhesives for laminates (plywood), feeds, and dietetic preparations. Acts as a thickener, whitening agent, binder, coating, glue, and sizing. 

Porphyrins, phthalocyanines, crown ethers and their complexes, modified by long-chain peripheral substituents, exhibit attractive properties as liquid crystals [80-88]. The complex [Cu(L263)] forms part of a thermoreactive composition used for the manufacture of polymer coatings, glues and hermetic compositions, and for shaping various articles [89]. 

Although it is diffucult to homopolymerize MAH it can be easily copolymerized with numerous vinyl monomers. Such copolymers have achieved technical importance as coatings, glues, adhesives, thickeners, resins, and engineering plastics. In recent literature these polymers were also investigated as side-chain liquid-crystalline polymers [965], ArF-or 193nm-photoresists [966-972]. 

Well over 90% of all synthetic resins made today comprise no more than 20 types, although there are certain variations to be found within each type. Synthetic resins are familiar to most people as plastics, but they have other uses, such as in the manufacture of surface coatings, glues, synthetic fibres and textile fibres. The rapid growth of the synthetic resin industry is because ample supplies of the necessary raw materials are available from petroleum. 

Control of the penetration rate of the aqueous phase in a converting operation such as size press treatment, coating, glueing (influences also the machine runnability). 

The 2-imino-4-thiazolines may be used as ultraviolet-light stabilizers of polyolefin compositions (1026). 2-Aminothiazole improves adhesive properties of wood to wood glue (271). Cbmpound 428 exhibits antioxidant properties (Scheme 242) (1027). Ammonium N-(2-thiazolyl)dithio-carbamate (429) is a bactericide and fungicide used in industrial products such as lumber, paint, plastics, and textiles (1037). Compound 430 is reported (1038) to form an excellent volume of foam coating in aluminum pans when ignited with propane. 

Lay-up proceeds by laying down the veneer which is to be the back surface of the panel. Then a sufficient number of pieces of core veneer are passed through the glue spreader to form the next layer of cross-oriented veneer. The glue spreader commonly used in hardwood plywood manufacture is a roU coater in which a pair of opposing mbber roUs are coated with a thin layer of adhesive. As the veneer is passed between the roUs, the adhesive is transferred to the surfaces of the veneer. Adhesive is appHed only to the cross-pfles and in sufficient quantity to provide a continuous layer on both opposing faces of veneer. Thus, in the case of a three-ply panel, only the core layer is spread with adhesive and in that of a five-ply panel, the second and fourth layers both of which are cross-pfles, are spread with adhesive. Then the top surface veneer, which is normally the decorative surface, is placed on the assembly. 

Fluoridation of potable water suppHes for the prevention of dental caries is one of the principal uses for sodium fluoride (see Water, municipal WATER treatment). Use rate for this appHcation is on the order of 0.7 to 1.0 mg/L of water as fluoride or 1.5 to 2.2 mg/L as NaF (2). NaF is also appHed topically to teeth as a 2% solution (see Dentifrices). Other uses are as a flux for deoxidiziag (degassiag) rimmed steel (qv), and ia the resmelting of aluminum. NaF is also used ia the manufacture of vitreous enamels, ia pickling stainless steel, ia wood preservation compounds, caseia glues, ia the manufacture of coated papers, ia heat-treating salts, and as a component of laundry sours. 

A majority of the fasteners used in automobiles in the United States are coated with microcapsules loaded with an adhesive. When the fastener is installed, a fraction of the capsules in the coating mpture releasing the adhesive payload. The adhesive essentially glues the fasteners in place preventing them from becoming loose and causing rattles. The capsules are designed so that only a fraction of them break each time a fastener is taken off and put back. The on/off cycle can be repeated three or four times. 

The chemical materials requited for this process iaclude the cormgatiag adhesive, 1—1.2 MPa (150—175 psi) process steam to provide heat to set the cormgator adhesive, possible coatings appHed to the surface of the linerboard facings, possible chemicals impregnated into the linerboard and/or medium, the manufacturer s (glue) joint adhesive, and the printing ink (see Inks). 

In the late 1800s, when the demand for coated paper for the halftone printing process increased, casein rapidly replaced glue. Casein forms a hard, tough film when dry, and can be waterproofed easily with formaldehyde (qv). The properties of soy protein are similar to those of casein, and soy protein has been substituted for it in many types of coated papers requiring a casein-type binder (see Soybeans and other oilseeds). Casein, a valuable food product, is seldom used as a paper adhesive, in spite of its excellent adhesive properties. 

Dicyandiamide reduces the viscosity of certain coUoidal solutions. This property is of commercial significance ia the manufacture of glues and adhesives, ia the coating and sizing of paper and textiles, and ia the conditioning of phosphate drilling muds (see Petroleum). This action may prove useful ia other appHcations where control of viscosity is important (54). 

Paper and allied products Paper manufacture, conversion of paper and paperboard, manufacture of paperboard boxes and containers Paper and fiber residues, chemicals, paper coatings and filters, inks, glues, fasteners... 

Epoxy resins have outstanding mechanical and electrical properties, dimensional stability, resistance to heat and chemicals, and adhesion to other materials. They are used for casting, potting, encapsulation, protective coatings, and adhesives. Epoxy glues separate the resin from the curing. igciU to be mixed just prior to use. 

Few non.chemists know exactly what an epoxide is. but practically everyone has used an "epoxy glue for household repairs or an epoxy resin for a protective coating. Epoxy resins and adhesives generally consist of two components that are mixed just prior to use. One component is a liquid "prepolymer/ and the second is a "curing agent" that reacts with the prepolymer and causes it to solidify. 

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