Water based rubber cement and tire with fabricated tread

摘要

The invention relates to a water based rubber cement and tire with fabricated tread where the tire tread is fabricated by joining ends of an uncured rubber strip containing a high content of hydrophobated precipitated silica content with a water based cement containing a diene-based elastomer and a component reactive with said diene based elastomer and with residual hydroxyl groups on said hydrophobated precipitated silica contained in said uncured rubber strip.

主权项

1. A pneumatic tire which comprises an assembly of uncured rubber components including an outer circumferential uncured tread rubber strip with opposing ends of said tread rubber strip joined to form a splice which includes a cement between said tread strip ends comprised of a dried aqueous cement composition between said opposing ends of said rubber strip, for which the cement composition is exclusive of silica, and alkoxysilane and alkylsilane containing compounds, and contains at least one silica coupling agent compound,
wherein the rubber composition of said uncured tread rubber strip is comprised of, based on parts by weight per 100 parts by weight of rubber (phr): (A) 100 phr of at least one sulfur curable diene-based elastomer comprised of at least one polymer of at least one of isoprene and 1,3-butadiene and of styrene with at least one of isoprene and 1,3-butadiene; (B) about 70 to about 200 phr of hydrophobated precipitated silica; wherein said hydrophobated precipitated silica is comprised of precipitated silica hydrophobated with at least one silica coupling agent comprised of bis(3-triethoxysilylpropyl)polysulfide containing an average from about 2 to about 4 connecting sulfur atoms in its polysulfidic bridge or alkoxyorganomercaptosilane, wherein said aqueous cement composition contains silica coupling agent compound consisting of at least one of: (1) carboxymaleimidophenhyl ester, (2) disodium salt of 2,2′-dithiosalicylic acid, (3) bis-succimide polysulfide, (4) 2-benzothiozyl-3-(propane-1,2-diol), (5) o-salicylalicylic acid, (6) pyrazine amide, (7) 3,3′-tetrathiodipopanol, (8) hydroxyethyl-phenoxyacetic acid (9) 3,3′-tetrathiodiproopionamide, (10) poly-(2-propanol-1,3-polysulfide), (11) 3,3′-tetrathiodipropionitrile, (12) nicotinamide, (13) zinc and sodium salts of salicylic acid, (14) diamompdorpsomate salt, and (15) bisaniline PD bismaleimide wherein said cement contains from about 2 to about 70 phr of rubber reinforcing carbon black, and wherein said cement contains at least one of zinc oxide and fatty acid comprised of at least one of stearic, palmitic and oleic acid.