Bonding glass fibers to rubber
AssigneeThe General Tire & Rubber Company
InventorOtto C. Elmer
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Abstract
An aqueous alkaline dispersion of a rubbery vinyl pyridine copolymer, a stabilized colloidal silica sol, and a heat reactable resorcinol-formaldehyde resole, in certain amounts, is useful in forming an adhesive for bonding glass fiber reinforcing elements or cords to rubber compounds or stocks. After dipping the glass fiber cord in the one-step adhesive dip, the coated cord is heated to dry it and heat cure or heat set the adhesive on the cord. Thereafter, the adhesive containing glass fiber cord is combined or laminated (calendered) with a curable rubber compound and the resulting assembly is cured to form a composite in which the glass fiber cord is bonded to the rubber by means of said adhesive.
Claims6
A composition of matter consisting essentially of an aqueous alkaline dispersion of 100 parts by weight of a rubbery vinyl pyridine copolymer, from about 0.5 to 20 parts by weight of silica in the form of a stabilized colloidal silica sol in which the particles of silica have an average particle diameter of from about 1 to 150 millimicrons, from about 10 to 75 parts by weight of a water soluble, heat reactable resorcinol-formaldehyde resole having hydroxyl and methylol groups, from about 0 to 3 parts by weight of alkaline material selected from the group consisting of NH.sub.4 OH, KOH and NaOH, and from about 150 to 1100 parts by weight of water, said resole being made by reacting an excess of formaldehyde with resorcinol.
Dependencies are inferred from the claim text.