Published February 1973
This report concerns adhesives made from synthetic resins and synthetic and natural rubbers. It does not include "natural" adhesives, i.e., those based on animal, vegetable, or mineral products. Nor does it concern sealants and caulking compounds per se, although these subjects are touched on occasionally, since many adhesives are also used as sealants and caulking compounds. Within this scope, the report discusses markets, base materials, additives, formulations, properties, production processes, mechanism of adhesion, and bonding techniques, including joint design, surface pretreatment, adhesive application, parts assembling, and adhesive bond setting.
The process economics for preparing thermosetting resin based adhesives are illustrated by the production of urea and phenolic resin syrups for plywood and composition board adhesives, and the process economics for making rubber based adhesives are illustrated by the production of a pressure sensitive adhesive for the conversion of continuous, flexible pressure sensitive adhesive products.
The process economics for other thermosetting resin and rubber based adhesives may be extrapolated from these illustrations with the necessary modifications for the cases in question. Thermoplastic resin based adhesives are produced either by incorporating the necessary additives into the resin when the resin itself is being prepared, or by blending the already made resin with the required additives. Since process economics for some of these thermoplastic resins are covered by other PEP reports, none is included in this one.
Process information was derived mainly from technical journals and bulletins, reference books, equipment manufacturers, and patents. Information on industry status was assembled principally from technical, marketing, and trade journals. Reviews on the mechanisms and properties are based on reference books, technical bulletins, and published articles.
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