Process for the production of reinforced rubber articles

In a process for the production of reinforced rubber articles formed from polyester yarn twisted into cord and embedded into rubber stock, the steps comprising:

• treating the yarn with an overfinish composition comprising about 60 to 90 weight percent of water and about 10 to 40 weight percent of an oil portion, the oil portion comprising about 50 to 70 weight percent of hexadecyl stearate, about 3 to 9 weight percent of glycerol monooleate, about 2 to 8 weight percent of decaglycerol tetraoleate, about 5 to 12 weight percent of ethoxylated tall oil fatty acid, about 5 to 15 weight percent of sulfonated glycerol trioleate, about 1 to 10 weight percent of ethoxylated alkyl amine, and about 2 to 45 weight percent of a silane having the structural formula:
• ##STR4## wherein n=2 to 5;
• and including from about 4 to 25 parts per hundred parts of rubber of hydrated silica particles in the rubber stock.