Hydrolysis glue

Emulsion Adhesives. The most widely used emulsion-based adhesive is that based upon poly(vinyl acetate)—poly(vinyl alcohol) copolymers formed by free-radical polymerization in an emulsion system. Poly(vinyl alcohol) is typically formed by hydrolysis of the poly(vinyl acetate). The properties of the emulsion are derived from the polymer employed in the polymerization as weU as from the system used to emulsify the polymer in water. The emulsion is stabilized by a combination of a surfactant plus a coUoid protection system. The protective coUoids are similar to those used paint (qv) to stabilize latex. For poly(vinyl acetate), the protective coUoids are isolated from natural gums and ceUulosic resins (carboxymethylceUulose or hydroxyethjdceUulose). The hydroHzed polymer may also be used. The physical properties of the poly(vinyl acetate) polymer can be modified by changing the co-monomer used in the polymerization. Any material which is free-radically active and participates in an emulsion polymerization can be employed. Plasticizers (qv), tackifiers, viscosity modifiers, solvents (added to coalesce the emulsion particles), fillers, humectants, and other materials are often added to the adhesive to meet specifications for the intended appHcation. Because the presence of foam in the bond line could decrease performance of the adhesion joint, agents that control the amount of air entrapped in an adhesive bond must be added. Biocides are also necessary many of the materials that are used to stabilize poly(vinyl acetate) emulsions are natural products. Poly(vinyl acetate) adhesives known as "white glue" or "carpenter s glue" are available under a number of different trade names. AppHcations are found mosdy in the area of adhesion to paper and wood (see Vinyl polymers). 

U. Schneider, E. Kenndler, Identification of Plant and Animal Glues in Museum Objects by GC MS, After Catalytic Hydrolysis of the Proteins by the Use of a Cation Exchanger, with Simultaneous Separation from the Carbohydrates, Fresenius Journal of Analytical Chemistry, 371,81 87 (2001). 

Col crysts, mp 232-6° (decomp), d 1.161. Very sol in w, si sol in ale, insol in eth. Was obtained in 1820 by Braconnot by treating isinglass (fish glue) with HaS04(Ref 2). Can also be prtpd by the action of coned NH4OH on monochloroacetic acid as well as by alkaline hydrolysis of gelatine, etc... 

Emulsion Adhesives The most widely used emulsion-based adhesive is that based upon poly(vinyl acetate)-poly(vinyl alcohol) copolymers formed by free-radical polymerization in an emulsion system. Poly(vinyl alcohol) is typically formed by hydrolysis of the poly(vmyl acetate). This is also known as white glue. ... 

A great deal of chemical transformation takes place before consumers receive their furniture, flooring, and other indoor building materials. Polymerization of glues, coatings and plashes, or heat processing of manufactured wood products, generates volatile by-products that can continue to be emitted from the material after it has been installed. Once installed, further transformations increase the load of odorous or toxic gas-phase species (Uhde and Salthammer, 2007). Reactions discussed here include oxidation and hydrolysis. 

Intensive studies of the products of hydrolysis of substituted chloro-silanes and esters have led to an important new branch of chemistry. Many organo-silicon compounds were prepared by Kipping and his school in the early years of this century and it was observed that glue-like products often resulted from the hydrolysis of these compounds, as well as intractable solids of the kinds already mentioned. No study was made of these polymeric products which are now the basis of silicone chemistry. 

Starch glue (dirt binding) hydrolysis during laundry wash Alpha amylase... 

Water-based glues in damp structures >85-95 Saponification, material-specific products of hydrolysis... 

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