Ceramics elastomer adhesion

The polymers of the 2-cyanoacryhc esters, more commonly known as the alkyl 2-cyaiioacrylates, are hard glassy resins that exhibit excellent adhesion to a wide variety of materials. The polymers are spontaneously formed when their Hquid precursors or monomers are placed between two closely fitting surfaces. The spontaneous polymerisation of these very reactive Hquids and the excellent adhesion properties of the cured resins combine to make these compounds a unique class of single-component, ambient-temperature-curing adhesives of great versatiUty. The materials that can be bonded mn the gamut from metals, plastics, most elastomers, fabrics, and woods to many ceramics. 

The largest market for elastomer-based adhesives is that of lamination (see Laminates). Modem office furniture having Formica as a surfacing material is made with an elastomer-based adhesive. Tile adhesives for ceramic or carpet tile are also elastomer-based and usually solvent appHed. Paper adhesives and shoe manufacture also use substantial quantities of mbber-based materials. Solvent-weld adhesives are used to join plastic plumbing and to repair vinyl sheeting. 

Plasma processing technologies ate used for surface treatments and coatings for plastics, elastomers, glasses, metals, ceramics, etc. Such treatments provide better wear characteristics, thermal stability, color, controlled electrical properties, lubricity, abrasion resistance, barrier properties, adhesion promotion, wettability, blood compatibility, and controlled light transmissivity. 

Finally, for practical reasons it is useful to classify polymeric materials according to where and how they are employed. A common subdivision is that into structural polymers and functional polymers. Structural polymers are characterized by - and are used because of - their good mechanical, thermal, and chemical properties. Hence, they are primarily used as construction materials in addition to or in place of metals, ceramics, or wood in applications like plastics, fibers, films, elastomers, foams, paints, and adhesives. Functional polymers, in contrast, have completely different property profiles, for example, special electrical, optical, or biological properties. They can assume specific chemical or physical functions in devices for microelectronic, biomedical applications, analytics, synthesis, cosmetics, or hygiene. 

Use Hot-melt adhesives for coatings and packaging, chewing-gum base, cosmetics, pharmaceuticals, lubricants, ceramics, processing aids, laminants, textiles, paints, rubber and elastomers, and waterproofing. 

Uses Filler, additive tor plastics, coating, friction, refractory, ceramic, construction, elastomer, sealant, and adhesive applies. 

Chem. Descrip. Condensed ammonium naphthalene sulfonate Uses Vise, depressant for molding and extruding operations In ceramics dispersant for emulsion paints, agric., gypsum slurries emulsifier for emulsion polymerization of syn. elastomers vise, reducer for pigment slurries sec. stabilizer for SBR mfg. food pkg. adhesives, paper emulsifier In mfg. of food-contact articles Regulatory FDA 21CFR 175.105,176.170,176.180,178.3400 EPA exempt BGA approved... 

Uses Filler, additive for plastics, coating, friction, refractory, ceramic, construction, elastomer, sealant, and adhesive applies., for nylon, phenolic molding compds., epoxy, polyester, PU/polyurea Featiffes Cost-effective functional filler surf, modifications can improve processing, bonding between resin and filler, mech. and phys. props., material handling and warehousing, etc. 

Dissimilar materials, including plastics, are readily joined by many adhesives, provided that proper surface treatments are used. Adhesives can be used to join metals, plastics, ceramics, cork, rubber, and combinations of materials. Adhesives can also be formulated to be conductive. The focus of this book is on adhesives for bonding plastics, thermosets, elastomers, and metals. 

Adhesives can join any combination of solid materials, regardless of shape or thickness. Materials such as plastics, elastomers, ceramics, and wood can be joined more economically and efficiently by adhesive bonding than by other methods. 

Tackifiers (A.S.C., 1986 Dick, 1987) - Tackifiers are used in certain types of adhesives and sealants to greatly improve initial adhesive strength (tack strength) on contact with an adherend surface before a stronger bond is formed later during the cure process. Elastomers such as natural rubber and butyl rubber, and thermoplastic hot melt systems all have low tack and require tackifiers to adhere well to polar substrates such as glass, ceramics, masonry and metal surfaces. 

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