Phenolic plastic mortars

The classic thermosets, such as ebonite, phenolics, ureas, melamines and polyesters as well as the epoxies, when reinforced with fiberglass or graphite fibers could also be classified as high performance thermosets. While these plastics cannot be readily extruded or injection molded, they are resistant to the effects of moderately high hostile environments. Phenolic resin mortars have been used for over a half century for the construction of chemical resistant vessels and for joining brick and tile used as linings in hot acid environments. (1.)... 

There is no sharp dividing line between plastic mortars and sealants, but the former are usually in situ-polymerized, highly-filled, rigid composites while the latter are usually in sltu-polymerized, flexible polymers. Since plastic mortars do not require expensive molds, the phenolic and urea plastic motars were the pioneer plastics. The Interest in these readily fabricated, labor-intensive, plastics decreased as automated molding processes were developed. However, because of their excellent properties and the need to conserve energy, there is an renewed interest in these materials. 

Although the use of simple diluents and adulterants almost certainly predates recorded history, the use of fillers to modify the properties of a composition can be traced as far back as eady Roman times, when artisans used ground marble in lime plaster, frescoes, and po22olanic mortar. The use of fillers in paper and paper coatings made its appearance in the mid-nineteenth century. Functional fillers, which introduce new properties into a composition rather than modify pre-existing properties, were commercially developed eady in the twentieth century when Goodrich added carbon black to mbber and Baekeland formulated phenol— formaldehyde plastics with wood dour. 

Hydresol . [BASF AG] Naphthalene sulfonic or phenol-sulfonic adds/form-aldehyde condensates plasticizers for mine binders, for inqnovhig woik-ability of mine -bond mortar and concrete. 

Syntactic Foam sin- ltak-tik n (cellular mortar) A term applied to composites of tiny, hollow spheres in a resin or plastic matrix. The spheres are usually of glass, although phenolic microspheres were used in the early... 

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