Elastomer functionalized by grafted carboxyl or ester groups and its application to the production of functionalized elastomer/bitumen compositions which can be used for the preparation of coatings
US5804619A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 1997 |
| Grant date | Sep 8, 1998 |
| Priority date | — |
| Expiry date | Aug 22, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2800/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A functionalized elastomer is provided which is of the type containing a substrate elastomer, having a weight-average molecular mass (Mw).sub.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 Mw is such that the ratio ##EQU1## is less than 20% and the sequences grafted onto the substrate correspond to the formula ##STR1## in which R.sub.1 denotes an (x+z+1)-valent C.sub.1 to C.sub.12 hydrocarbon radical, X represents H or a monovalent C.sub.1 to C.sub.12 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 .ltoreq.3. Bitumen/EF compositions useful for making surfacings may be produced by incorporating the EF into a bituminous component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.