Abstract: A bimetallic catalytic system consists of the metallic components of formulae RLi and Ca(AR?y)2(L)x in which: R represents a substituted or unsubstituted C1-C10 aliphatic radical, a substituted or unsubstituted C6-C20 aromatic radical or a substituted or unsubstituted C1-C10 heteroaliphatic radical; A denotes N or C; y has the value 2 when A is N and the value 3 when A is C; each R? represents a hydrogen atom, a substituted or unsubstituted C5-C10 aliphatic radical, a substituted or unsubstituted C6-C20 aromatic radical, a substituted or unsubstituted silyl radical, a C1-C10 aliphatic radical substituted by at least one substituted or unsubstituted silyl radical, a C6-C20 aromatic radical substituted by at least one substituted or unsubstituted silyl radical; L represents a ligand; and x is a number ranging from 0 to 4.

Abstract: A bimetallic catalytic system consists of the metallic components of formulae RLi and Ca(AR?y)2(L)x in which: R represents a substituted or unsubstituted C1-C10 aliphatic radical, a substituted or unsubstituted C6-C20 aromatic radical or a substituted or unsubstituted C1-C10 heteroaliphatic radical; A denotes N or C; y has the value 2 when A is N and the value 3 when A is C; each R? represents a hydrogen atom, a substituted or unsubstituted C5-C10 aliphatic radical, a substituted or unsubstituted C6-C20 aromatic radical, a substituted or unsubstituted silyl radical, a C1-C10 aliphatic radical substituted by at least one substituted or unsubstituted silyl radical, a C6-C20 aromatic radical substituted by at least one substituted or unsubstituted silyl radical; L represents a ligand; and x is a number ranging from 0 to 4.

Abstract: The present invention relates to the use of a compound of formula (I): wherein: R represents a linear or branched alkyl group, comprising from 3 to 27 carbon atoms, said alkyl group being substituted with at least two hydroxyl groups, and which may optionally contain one or more unsaturations; and R? is selected from sugars or sugar-alcohols; for preparing polyurethanes and polyesters.

Abstract: The present invention relates to the use of polymers of the following formula (I): wherein: A1i represents a radical alkylene divalent comprising from 2 to 20 carbon atoms; A2i represents a radical alkylene divalent comprising from 2 to 20 carbon atoms; X1i is chosen from the group consisting of: —S—, —CH2— and a bond; Y represents H, a phenyl group or an alkyl group comprising from 1 to 10 carbon atoms; i represents an integer varying from 1 to n; n represents an integer comprised from 2 to 1,000; provided that the total number of carbon atoms of the radicals A2i, X1i et A1i is greater than or equal to 8; as additives in a polymeric matrix chosen from the group consisting of matrices of polyester, poly(vinyl chloride), polyurethane, polyamide, poly(alkyl acrylate), poly(alkyl methacrylate), polystyrene and polyolefin, said polymer of formula (I) being different from poly(ricinoleic acid).

Abstract: The present invention relates to the use of polymers of the following formula (I): wherein: A1i represents un radical alkylene divalent comprising from 2 to 20 carbon atoms; A2i represents a radical alkylene divalent comprising from 2 to 20 carbon atoms; X1i is chosen from the group consisting of: —S—, —CH2— and a bond; Y represents H, a phenyl group or an alkyl group comprising from 1 to 10 carbon atoms; i represents an integer varying from 1 to n; n represents an integer comprised from 2 to 1,000; provided that the total number of carbon atoms of the radicals A2i, X1i et A1i is greater than or equal to 8; as additives in a polymeric matrix chosen from the group consisting of matrices of polyester, poly(vinly chloride), polyurethane, polyamide, poly(alkyl acrylate), poly(alkyl methacrylate), polystyrene and polyolefin, said polymer of formula (I) being different from poly(ricinoleic acid).

Abstract: The present invention concerns a compound of following formula (I): where: R1 is H or an alkyl group, A1 is a divalent straight-chain or branched alkylene radical, and A2 is a —O-A4-O— radical, A4 is a divalent straight-chain or branched alkylene radical.

Abstract: The present invention relates to the use of a compound of formula (I): wherein: R represents a linear or branched alkyl group, comprising from 3 to 27 carbon atoms, said alkyl group being substituted with at least two hydroxyl groups, and which may optionally contain one or more unsaturations; and R? is selected from sugars or sugar-alcohols; for preparing polyurethanes and polyesters.

Abstract: The present invention concerns a compound of following formula (I): where: R1 is H or an alkyl group, A1 is a divalent straight-chain or branched alkylene radical, and A2 is a —O-A4-O— radical, A4 is a divalent straight-chain or branched alkylene radical.