Bridgestone Corporation

Veronica Cantonetti

Davide Privitera

Salvatore Cotugno

Francesco Botti

A water-based cement for producing tires, having water as solvent, cross-linkable unsaturated-chain polymer base, of sulphur, reinforcing filler, zinc oxide, accelerators, and an emulsifier of the general formula (I)[RRRNR(N(R))](n+1)X&#x2003;&#x2003;(I)

Water-based cement for producing tyres

A water-based cement for producing tyres includes 5 to 80% by weight of water, 10 to 60% by weight of a cross-linkable unsaturated-chain polymer base, 1 to 15% by weight of emulsifiers, and a quantity of metal oxide depending on the desired degree of adhesion.

A water-base adhesive mix for producing tires and containing, by weight, 20 to 80% water, 10 to 40% of a cross-linkable unsaturated-chain polymer base, 0.2 to 1% sulphur, 1 to 25% of a reinforcing filler, 1 to 10% of emulsifiers, 2 to 8% of a resin which cross-links by reaction with polyisocyanates, and 0.5 to 5% of an aqueous dispersion having blocked aromatic polyisocyanates with an activation temperature of 120 to 160&#xb0; C. The blocked aromatic polyisocyanates are produced by reaction of an aromatic polyisocyanate (a), a blocking agent (b), and a nonionic diol alkoxylate (c) of the general formula (I)RCHO(CHCHO)(CHCHCHO)R&#x2003;&#x2003;(I) 

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Rome, Italy

Veronica Cantonetti