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US 6,646,079 B2Granted
Multimodal polymers by controlled radical polymerization in the presence of alkoxyamines
AssigneeAtofina
InventorsOlivier Guerret, Sophie Robin, Yves Gnanou
Life of this patent
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Abstract
For the preparation of a multimodal polymer at least one monomer is subjected to free radical polymerization in the presence of several alkoxyamines comprising the sequence of formula: in which RL is a monovalent radical exhibiting a molar mass of greater than 15, A represents the core of the alkoxyamine and n is a non-zero integer, the alkoxyamines exhibiting different values of n.
Claims24
A composition comprising several chemically different alkoxyamines, unsubstituted or substituted, each comprising a sequence of the formula:
- in which RL represents a monovalent radical exhibiting a molar mass of greater than 15, A represents the core of the alkoxyamine having a carbon atom bonded to —O— and n is a non-zero integer, said alkoxyamines exhibiting different values of n, and the unfulfilled valences represent hydrogen or hydrocarbon.
Dependencies are inferred from the claim text.