Polyamide in combination with polycarbonate, metal complex, polyisocyanating agent for polyester modification and rubber tire structures made therefrom

Claim 2

In a heat stable structure comprising a heat stable polyester tire cord bonded to natural or diene synthetic rubber by means of an R/F/L adhesive, the improvement wherein the cord is made of polyethylene terephthalate fibers melt spun from a melt composition resulting from melting a physical mixture comprising polyethylene terephthalate having an I.V. of at least 0.6 and not greater than 1.5, from about 0.01 part to about 5.0 parts of a polyamide having a melting point in excess of 175* C., from about 0.0001 part to about 0.1 part of copper dimethyldithiocarbamate, all parts being by weight per 100 parts of polyethylene terephthalate.

Claim 3

The structure of claim 1 wherein the polyamide is a linear condensation superpolymer of hexamethylenediamine and adipic acid.

Claim 4

The structure of claim 1 the composition also containing from about 0.5 part to about 2.5 parts of a polycarbonate having a molecular weight from about 15,000 to about 80,000.

Claim 5

The structure of claim 3 wherein the polycarbonate is the reaction product of carbonic acid and bis phenol A and has the repeating unit wherein n has a value from about 10 to 400.

Claim 6

In a heat stable structure comprising a heat stable polyester tire cord bonded to natural or diene synthetic rubber by means of an R/F/L adhesive, the improvement wherein the cord is made of polyethylene terephthalate fibers melt spun from a melt composition resulting from melting a physical mixture comprising polyethylene terephthalate having an I.V. of at least 0.6 and not more than 1.5, from about 0.01 part to about 5.0 parts of a polyamide having a melting point in excess of 175* C., from about 0.5 part to about 2.5 parts of a polycarbonate having the repeating unit wherein n has a value from about 10 to 400 and from about 0.01 part to about 2.0 parts of an organic polyisocyanating agent, all parts being by weight per 100 parts of polyethylene terephthalate.

Claim 7

In a heat stable structure comprising a heat stable polyester tire cord bonded to natural or diene synthetic rubber by means of an R/F/L adhesive, the improvement wherein the cord is made of polyethylene terephthalate fibers melt spun from a melt composition resulting from melting a physical mixture comprising polyethylene terephthalate having an I.V. of at least 0.6 and not more than 1.5, from about 0.01 part to about 5.0 parts of a polyamide having a melting point in excess of 175* C., from about 0.5 part to about 2.5 parts of a polycarbonate having the repeating unit wherein n has a value from about 10 to 400 and from about 0.01 part to about 2.0 parts of an organic polyisocyanating agent, all parts being by weight per 100 parts of polyethylene terephthalate.

Claim 8

The structure of claim 5 wherein the polyisocyanating agent in the composition is a blocked isocyanate.

Claim 9

The structure of claim 6 wherein the isocyanate is blocked with a blocking agent selected from the group consisting of primary and secondary alcohols, monohydric and polyhydric phenols, amines, amides, lactams, and resinous reaction products of an aldehyde and a component selected from the group consisting of urea, phenol, and resorcinol.