Title of Invention

A HEAVY VEHICLE TYRE WITH A CROWN REINFORCEMENT COMPRISING CROSS-LINKED RUBBER COMPOSITION.

Abstract

The invention concerns a rubber composition having reduced hysteresis for use in a crown ply reinforcement of a tyre casing designed to bear heavy loads. The inventive rubber composition comprises an elastomer matrix containing natural rubber or a synthetic polyisoprene as major constituent, and a reinforcing filler containing carbon black, and is such that said carbon black simultaneously fulfils the following conditions: (i) 45 $m(F) CTAB specific surface in m?2¿/g (as per the ASTM D3765-80 standard) $m(F) 70; (ii) 45 $m(F) BET specific surface in m?2¿/g (as per the ASTM D4820-93 standard) $m(F) 70; (iii) 45 $m(F) iodine absorption index IA in mg/g (as per the ASTM D1510-81 standard) $m(F) 70; (iv) BET surface/IA index ratio $m(F) 1.07; (v) 115 $m(F) DBP structure value in ml/100g (as per the ASTM D2414-93 standard) $m(F) 170; (vi) 85 nm $m(F) Stokes dst diameter in nm $m(F) 145, wherein dst is the diameter of aggregates corresponding to the maximum frequency of Stokes diameters in an aggregate distribution; and (vii) D50/dst $m(F) 0.0090. CTAB + 0.19, wherein D50 is the difference, in the aggregate distribution, between the Stoke diameters of the two aggregates corresponding to a common frequency equal to 50 % of the maximum frequency of Stokes diameters, dst and D50 being measured by centrifugal photo-sedimentation analysis.

Full Text

Documents:

180-MUMNP-2003-ABSTRACT(22-12-2008).pdf

180-MUMNP-2003-ABSTRACT(GRANTED)-(12-6-2009).pdf

180-MUMNP-2003-CANCELLED PAGES(22-12-2008).pdf

180-MUMNP-2003-CLAIMS(22-12-2008).pdf

180-MUMNP-2003-CLAIMS(COMPLETE)-(5-2-2003).pdf

180-MUMNP-2003-CLAIMS(GRANTED)-(12-6-2009).pdf

180-MUMNP-2003-CORRESPONDENCE(22-12-2008).pdf

180-MUMNP-2003-CORRESPONDENCE(29-4-2009).pdf

180-MUMNP-2003-CORRESPONDENCE(IPO)-(1-7-2009).pdf

180-MUMNP-2003-DESCRIPTION(COMPLETE)-(22-12-2008).pdf

180-MUMNP-2003-DESCRIPTION(COMPLETE)-(5-2-2003).pdf

180-MUMNP-2003-DESCRIPTION(GRANTED)-(12-6-2009).pdf

180-MUMNP-2003-EUROPEAN PATENT(22-12-2008).pdf

180-mumnp-2003-form 13(22-12-2008).pdf

180-mumnp-2003-form 13(29-4-2009).pdf

180-MUMNP-2003-FORM 16(6-8-2012).pdf

180-MUMNP-2003-FORM 18(25-4-2006).pdf

180-MUMNP-2003-FORM 1A(22-12-2008).pdf

180-mumnp-2003-form 2(22-12-2008).pdf

180-MUMNP-2003-FORM 2(GRANTED)-(12-6-2009).pdf

180-MUMNP-2003-FORM 2(TITLE PAGE)-(22-12-2008).pdf

180-MUMNP-2003-FORM 2(TITLE PAGE)-(GRANTED)-(12-6-2009).pdf

180-MUMNP-2003-FORM 3(22-12-2008).pdf

180-MUMNP-2003-FORM 5(5-2-2003).pdf

180-MUMNP-2003-PETITION UNDER RULE 137(22-12-2008).pdf

180-MUMNP-2003-PETITION UNDER RULE 138(22-12-2008).pdf

180-MUMNP-2003-POWER OF AUTHORITY(22-12-2008).pdf

180-MUMNP-2003-POWER OF AUTHORITY(6-5-2003).pdf