Elastomer functionalised by carboxylic groupings, or graftesters, and the production of elastomer/ bitumen compositions suitable for making surfactings

• Main Authors: J.P. PLANCHE, P. NICOL, L. GERMANAUD
• Format: Patent
• Language: English
• Published: 12.11.2003
• Edition: 7
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS

PCT No. PCT/FR96/01613 Sec. 371 Date Aug. 22, 1997 Sec. 102(e) Date Aug. 22, 1997 PCT Filed Oct. 16, 1996 PCT Pub. No. WO97/14726 PCT Pub. Date Apr. 24, 1997A functionalized elastomer is provided which is of the type containing a substrate elastomer, having a weight-average molecular mass (+E,ovs M+EE w)0 of between 10,000 and 600,000 daltons and a polydispersity index of less than 5, onto which are grafted, in an amount representing 0.1 to 10% by weight of the substrate, sequences carrying carboxyl or ester functional groups, wherein its weight-average molecular +E,ovs M+EE w is such that the ratio is less than 20% and the sequences grafted onto the substrate correspond to the formula in which R1 denotes an (x+z+1)-valent C1 to C12 hydrocarbon radical, X represents H or a monovalent C1 to C12 hydrocarbon radical R, z is equal to zero or 1 and x is an integer having a value ranging from 1 to 3 with x+z </=3. Bitumen/EF compositions useful for making surfacings may be produced by incorporating the EF into a bituminous component.