摘要:
The present invention relates to a novel process for preparing alkoxyamines from a nitroxide and a dithiocarbamate by photolysis reaction.This process, which does not generate effluent containing metals, may be carried out in batch or in continuous mode and takes place at a lower temperature than the known processes for synthesizing alkoxyamines.
摘要:
A subject-matter of the invention is alkoxyamines resulting from β-phosphorated nitroxides corresponding to the formula: in which R represents an alkyl radical having a number of carbon atoms ranging from 1 to 3, R1 represents a hydrogen atom or a residue: in which R3 represents an alkyl radical having a number of carbon atoms ranging from 1 to 20, and R2 represents a hydrogen atom, an alkyl radical having a number of carbon atoms ranging from 1 to 8, a phenyl radical, an alkali metal, such as Li, Na or K, H4N+, Bu4N+ or Bu3HN+, exhibiting a kinetic dissociation constant kd, measured at 120° C. by EPR, of greater than 0.05 s−1. These compounds can be used as initiators for the (co)polymerizations of at least one monomer which can be polymerized by the radical route.
摘要:
The invention relates to the use of alkoxyamines of formula (I): for the preparation of polymerized or non-polymerized mono- or polyalkoxyamines of formula (II):
摘要:
The invention relates to the use of alkoxyamines of formula (I): for the preparation of polymerized or non-polymerized mono- or polyalkoxyamines of formula (II):
摘要:
The invention relates to a method for the polymerization of one or more methacrylate and/or methacrylic monomers, for the synthesis of methacrylate or methacrylic polymers or of exclusively methacrylic and/or methacrylate copolymers, comprising a step of bringing said monomer(s) into contact with one at least of the compounds of formula (I) and (II) below: in which: R1 and R2 may represent a phenyl group, R3 and R4 may together form an ═N-phenyl group, Z represents a group of formula —CR8R9R10, in which R8 and R9 may represent methyl groups and R10 may represent a —COO-phenyl group.
摘要翻译:本发明涉及聚合一种或多种甲基丙烯酸酯和/或甲基丙烯酸单体,用于合成甲基丙烯酸酯或甲基丙烯酸酯或甲基丙烯酸和/或甲基丙烯酸酯共聚物的方法,包括使所述单体接触的步骤 至少一种式(I)和(II)的化合物:其中:R 1和R 2可以表示苯基,R 1, 3和R 4可以一起形成-N-苯基,Z代表式-CR 8 R 9的基团, R 10,其中R 8和R 9可以表示甲基,R 10可以表示-COO 苯基。
摘要:
The invention relates to the use of alkoxyamines of formula (I): for the preparation of polymerized or non-polymerized mono- or polyalkoxyamines of formula (II):
摘要:
A subject-matter of the invention is alkoxyamines resulting from β-phosphorated nitroxides corresponding to the formula: These compounds can be used as initiators for the (co)polymerizations of at least one monomer which can be polymerized by the radical route.
摘要:
The invention relates to a BA diblock or BAB triblock copolymer, in which the A block is a non-substituted poly-oxyethylene chain having a mean molecular weight that is no higher than 100 kDa, and the B block is an anionic polymer which can be prepared using one or more monomers selected from among the vinyl monomers and derivatives thereof, said monomers being substituted with a (trifluoromethylsulfonyl)imide (TFSI) anion. The invention also relates to the uses of such a copolymer, in particular for preparing an electrolyte composition for lithium metal polymer (LMP) batteries.
摘要:
The use of a mixture of 5-pyrimidinol derivatives with sterically hindered phenol derivatives for adjusting the reactivity and the gel time of resin mixtures and reactive resin mortars based on radically polymerizable compounds is described. Furthermore, a resin mixture containing the inhibitor combination, a reactive resin mortar containing this resin mixture and two-component mortar systems with the reactive resin mortar according to the invention and a hardener with improved stability in storage and good low-temperature hardening properties are also described. The resin mixture according to the invention is suitable in particular for chemical fastening of construction elements in boreholes in various substrates.
摘要:
The invention relates to the production and use of block copolymers which are obtained by means of controlled radical polymerization in the presence of nitroxides for the purpose of reinforcing fragile polymer matrices. The invention offers advantages such as (i) simplicity of copolymer synthesis and use and (ii) fine dispersion of the copolymer molecules in the fragile matrix, which ensures both the transparency of the material and high reinforcement against impact. More specifically, the invention relates to the radical synthesis of block copolymers comprising at least three blocks, which include one block having a glass transition temperature of less than 0° C. and a thermoplastic end block having a glass transition temperature of more than 0° C., thereby guaranteeing compatibility with the fragile matrix to be reinforced against impact.