Provided herein according to some embodiments is a dual cure stereolithography resin that includes a Diels-Alder adduct, which adduct is light polymerizable in the first, light, cure to produce an intermediate object, and on heating the intermediate object yields a bis-maleimide that can further react and/or polymerize during the second, heat, cure.

Provided herein according to some embodiments is a dual cure stereolithography resin that includes a Diels-Alder adduct, which adduct is light polymerizable in the first, light, cure to produce an intermediate object, and on heating the intermediate object yields a bis-maleimide that can further react and/or polymerize during the second, heat, cure.

A process for the continuous synthesis of a modified diene elastomer comprising at least one silicon atom directly connected to the elastomer chain is provided. The process comprises polymerization by n reactors r1 to rn, considered to be continuous stirred-tank reactors equipped with an internal stirring system and arranged in series, n varying from 2 to 15. The reactor r1 is fed by an input solution comprising a solvent, one or more monomer(s), an anionic polymerization initiator chosen from lithium amides and a polar agent. The temperature of each reactor varies from 20° C. to 150° C. and is greater than or equal to the temperature of the reactor which immediately precedes it. The living diene elastomer obtained exhibits a polydispersity index varying from 1.1 to 1.7. The process further comprises modification of the living diene elastomer obtained in the preceding stage by a functionalization, coupling or star-branching agent.

A process for the continuous synthesis of a modified diene elastomer comprising at least one silicon atom directly connected to the elastomer chain is provided. The process comprises polymerization by n reactors r1 to rn, considered to be continuous stirred-tank reactors equipped with an internal stirring system and arranged in series, n varying from 2 to 15. The reactor r1 is fed by an input solution comprising a solvent, one or more monomer(s), an anionic polymerization initiator chosen from lithium amides and a polar agent. The temperature of each reactor varies from 20° C. to 150° C. and is greater than or equal to the temperature of the reactor which immediately precedes it. The living diene elastomer obtained exhibits a polydispersity index varying from 1.1 to 1.7. The process further comprises modification of the living diene elastomer obtained in the preceding stage by a functionalization, coupling or star-branching agent.

A bimetallic catalytic system consists of the metallic components of formulae RLi and Ca(AR′.sub.y).sub.2(L).sub.x in which: R represents a substituted or unsubstituted C.sub.1-C.sub.10 aliphatic radical, a substituted or unsubstituted C.sub.6-C.sub.20 aromatic radical or a substituted or unsubstituted C.sub.1-C.sub.10 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 C.sub.5-C.sub.10 aliphatic radical, a substituted or unsubstituted C.sub.6-C.sub.20 aromatic radical, a substituted or unsubstituted silyl radical, a C.sub.1-C.sub.10 aliphatic radical substituted by at least one substituted or unsubstituted silyl radical, a C.sub.6-C.sub.20 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.

A bimetallic catalytic system consists of the metallic components of formulae RLi and Ca(AR′.sub.y).sub.2(L).sub.x in which: R represents a substituted or unsubstituted C.sub.1-C.sub.10 aliphatic radical, a substituted or unsubstituted C.sub.6-C.sub.20 aromatic radical or a substituted or unsubstituted C.sub.1-C.sub.10 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 C.sub.5-C.sub.10 aliphatic radical, a substituted or unsubstituted C.sub.6-C.sub.20 aromatic radical, a substituted or unsubstituted silyl radical, a C.sub.1-C.sub.10 aliphatic radical substituted by at least one substituted or unsubstituted silyl radical, a C.sub.6-C.sub.20 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.

The present invention relates to a modification polymerization initiator and a method for preparing the same, and the modification polymerization initiator includes a derived unit from a compound represented by Formula 1 and may include various functional groups in a molecule, and thus, may initiate polymerization reaction and introduce a functional group into a polymer chain at the same time. In addition, the preparation method according to the present invention may prepare the modification polymerization initiator with high purity in high yield.

The present invention relates to a modification polymerization initiator and a method for preparing the same, and the modification polymerization initiator includes a derived unit from a compound represented by Formula 1 and may include various functional groups in a molecule, and thus, may initiate polymerization reaction and introduce a functional group into a polymer chain at the same time. In addition, the preparation method according to the present invention may prepare the modification polymerization initiator with high purity in high yield.

The present disclosure relates to iron-containing compounds including a 2,6-diimino(heteroaryl) ligand useful for producing substituted-cyclo-alkanes, such as vinyl cyclobutanes. The present disclosure provides new and improved iron-containing catalysts with enhanced solubility in hydrophobic (nonpolar) solvents.

The present disclosure relates to iron-containing compounds including a 2,6-diimino(heteroaryl) ligand useful for producing substituted-cyclo-alkanes, such as vinyl cyclobutanes. The present disclosure provides new and improved iron-containing catalysts with enhanced solubility in hydrophobic (nonpolar) solvents.