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There are two types of adhesives that harden by drying: solvent-based adhesives and polymer dispersion adhesives, also known as emulsion adhesives. Solvent-based adhesives are a mixture of ingredients (typically polymers) dissolved in a solvent. White glue, contact adhesives and rubber cements are members of the drying adhesive family. As the ...
Adhesives may be broadly divided in two classes: structural and pressure-sensitive. To form a permanent bond, structural adhesives harden via processes such as evaporation of solvent (for example, white glue), reaction with UV radiation (as in dental adhesives), chemical reaction (such as two part epoxy), or cooling (as in hot melt).
Starch may be purified before being mixed with water; leaving gluten in makes a more permanent bond Dextrin glues British gum, Coccoina: usually derived from potato starch mid-19th century Polysaccharide glues mucilage, agar, algin: Tree gums/resins Balsam (fir) resins, such as Canada balsam, Dammar gum, Gum Arabic (also called acacia gum), Mastic
The glue is sticky when hot, and solidifies in a few seconds to one minute. Hot-melt adhesives can also be applied by dipping or spraying, and are popular with hobbyists and crafters both for affixing and as an inexpensive alternative to resin casting. In industrial use, hot-melt adhesives provide several advantages over solvent-based adhesives.
The adhesives used are special pressure-sensitive adhesives based on acrylates or synthetic rubber. In surgery, adhesives are used in the treatment of certain surgical wounds. These adhesives are usually based on fibrin, the natural adhesive substance that causes blood to clot when bleeding. Since fibrin occurs naturally in the body, it has the ...
Chemical structure of ethyl cyanoacrylate, the precursor to many commercial adhesives. The most common monomer is ethyl cyanoacrylate.Several related esters are known. To facilitate easy handling, a cyanoacrylate monomer is frequently formulated with an ingredient such as fumed silica to make it more viscous or gel-like.