Butadiene rubber tire carcass

The most common textile bonding compositions are, of course, the RFL (resorcinol-formaldehyde-latex) dips used to adhere tire carcass rubber to cord reinforcing members. A typical RFL composition calls for a latex terpolymer of styrene-butadiene-vinyl pyridine as well as the resorcinol and hexamethylene tetramine. Some natural rubber latex or regular SBR latex may also be added. The R F resin which forms in situ is able to react chemically with rayon by methylol etherification of the cellulose s hydroxyls. Similar reaction is likely with the amide groups of nylon fibers as shown in Figure 7. 

The largest use of a-picoline (2) is for production of 2-vinylpyridine (11) which, with butadiene and styrene, is converted into a terpolymer latex. This latex provides a coating that stiffens fabrics (e. g. nylon, polyester, rayon) that are incorporated into biased-ply car tires. The 2-vinylpyridinc assists in binding the rubber to the fabric carcass. a-Picoline is also used as a precursor to nitrapyrin (12), which prevents nitrogen loss from soil, and the herbicide picloram (13). 

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