Rubber compounding with glue

Because of their amphoteric properties, animal glues possess electrical charges which unmodified or with suitable modification by simple chemical additives are highly effective as colloidal flocculents and as protective colloids in such applications as paper manufacturer, rubber compounding, ore and metal refining, and for water and industrial waste-water treatment. 

Formaldehyde (CH20) is an important compound in the synthesis of various chemicals on an industrial scale. One of the first industrial applications was in the production of artificial Indigo. The variety of end products produced from formaldehyde include resins or glues (produced by the condensation of formaldehyde with urea, phenol, or melamine) as well as rubber, paper, fertilizers, explosives, engineering plastics, and specialty chemicals like acrolein, methacrylic acid, methyl methacrylate, etc. Because it is nearly impossible to handle in its pure gaseous form, formaldehyde is almost exclusively produced... 

In this chapter, a possibility of chlorinated natural robber and isoprene rubber epoxy dation by means of ozonation is investigated with the aim of improving adhesion characteristics of glnes based on these rubbers as it is known that epoxy compounds are good film-formers in glue compositions and increase the overall viscosity of the last ones. 

The most typical adhesive solvents are those based on elastomers, compounds characterized by the fact that they have a strong natural adhesiveness, especially in respect of themselves (the phenomenon of self-adhesion, the instantaneous adhesion of two films of glue after almost total evaporation of the solvent, is the basis for the composition of the contact glues especially neoprene-based (Fletcher 1971)). The basic chemical composition of neoprene synthetic rubber is polychloroprene (O Fig. 14.6). The polymer structure can be modified by copolymerizing chloroprene with, for example, 2,3-dichloro-1,3-butadiene to yield a family of materials with a broad range of chemical and physical properties. 

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