Diene copolymer including at least two blocks, method for synthesizing same and rubber composition containing same
AssigneesCompagne Generale des Etablissements Michelin, Michelin Recherche et Technique S.A.
InventorsRachid Matmour, Nicolas Seeboth
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Abstract
A process for the synthesis of a diene copolymer comprising at least two blocks, at least one of the blocks being composed of a diene elastomer, characterized in that it comprises a stage of 1,3-dipolar reaction of two polymers defined as being: a) a diene elastomer bearing an alkyne functional group at one or each of its chain ends, and b) a polymer bearing at least one azide functional group. This process of synthesis can be adjusted, whatever the nature of the monomers necessary to form each of the blocks of the copolymer. Each block can be synthesized with an appropriate chemistry, independently of the other block.
Claims17
A process for the synthesis of a diene copolymer comprising at least two blocks, at least one of the blocks being composed of a diene elastomer, comprising a 1,3-dipolar reaction of two polymers defined as being:
- a diene elastomer bearing an alkyne functional group at one or each of its chain ends, and
- a polymer bearing at least one azide functional group.
A diene copolymer comprising at least two blocks, at least one of the blocks being composed of a diene elastomer, comprising at least one sequence corresponding to the following formula:
- P-L-E
- in which wherein:
- P denotes a polymer,
- E denotes a diene elastomer,
- L denotes a divalent hydrocarbon group comprising at least one triazolediyl group corresponding to one of the formulae (D) and (F):
- * indicating a point of bonding to an E block of the copolymer,
- ** indicating a point of bonding to a P block of the copolymer,
- R5 denotes a hydrogen atom, a C1-C5 alkyl group, a cycloalkyl group, a C6-C15 aryl group, a C7-C15 arylalkyl group or a protective group for alkyne functional groups.
Dependencies are inferred from the claim text.