Tire having polyurethane laminate thereon

Claim 2

A pneumatic tire according to claim 2 including a generally toroidal shaped carcass, spaced beads having rubber sidewalls and a rubber tread, at least one of the sidewalls having a plurality of circumferentially extending grooves and having an adherent layer of the cured polyurethane in at least one groove therein, said layer having a color contrasting to the tire.

Claim 3

The tire according to claim 1 where the rubber reinforcing fillers are selected from carbon black, titanium dioxide, zinc oxide, calcium carbonate, filler clays, silicas and coloring pigments and where the organic polyisocyanates are selected from 1,6-hexamethylene diisocyanate, 1,10-decamethylene diisocyanate, 1,4-cyclohexylene diisocyanate, 4,4''-methylene-bis(cyclohexylisocyanate) and 1,5-tetrahydronaphthalene diisocyanate, isophorone diisocyanate, the 2,4- and 2,6-toluene diisocyanates, m-phenylene diisocyanate, diphenylmethane-4,4''-diisocyanate, hydrogenated diphenylmethane-4,4''-diisocyanate, 3, 3''-dimethyl-4,4''-bis phenylene diisocyanate and polyalkylene-polyarylene isocyanates.

Claim 4

The tire according to claim 1 wherein said cured reinforced polyurethane laminate is adhered to the tire sidewall.

Claim 5

A method of preparing the tire according to claim 1 which comprises (A) cleaning a portion of the surface of the cured rubber tire to be coated with a solvent, (B) coating the said surface with the liquid polyurethane reaction mixture and (C) curing the said reaction mixture to form a composite structure.

Claim 6

The method according to claim 6 where the cured polyurethane is reinforced with from about 5 to about 100 weight percent of rubber reinforcing fillers sufficient to provide a cured polyurethane having an ultimate tensile strength of from about 300 p.s.i. to about 2,000 p.s.i. with a corresponding ultimate elongation of from about 700 to about 250 percent at about 25* C.

Claim 7

The method according to claim 7 where the cured rubber tire is prepared from rubbers selected from natural rubber, and synthetic rubbers selected from butadiene-styrene copolymers, butadiene-acrylonitrile copolymers, polyisoprene, polybutadiene, isoprene-butadiene copolymers, butyl rubber, ethylene-propylene copolymers, and ethylene propylene terpolymers.

Claim 8

The method according to claim 8 where the polyisocyanate used to prepare the polyurethanes is an organic diisocyanate and hydroxyl terminated reactive hydrogen polymeric materials have a hydroxyl functionality of from about 2.1 to about 2.5 and a viscosity at about 30* C. of from about 10 poise to about 150 poise selected from hydroxyl terminated polymers of 1,3-butadiene, isoprene, copolymers of 1,3-butadiene and isoprene copolymers of 1,3-butadiene and styrene, copolymers of 1,3-butadiene and acrylonitrile, copolymers of 1,3-butadiene and ethyl acrylate and copolymers of 1,3-butadiene and chloro 1,3-butadiene, where the ratio of the isocyanato groups of the diisocyanate to the reactive hydrogen containing groups of the reactive hydrogen containing polymeric material is from about 1/1 to about 2/1 and where the said diisocyanate and polymeric material are reacted at a temperature of from about 20* to about 150* C.

Claim 9

The method according to claim 6 of repairing a gouged cured rubber tire.