摘要:
The invention relates to the field of plasticizers, compounds used as additives in polymers for facilitating the transformation thereof or modifying the mechanical properties thereof, especially rigidity.
摘要:
A method for synthesizing ω-amino-alkanoic acids or the esters thereof from natural unsaturated fatty acids passing through an intermediate ω-unsaturated nitrile compound. The method is simple to implement and, relative to known methods, avoids the environmental constraints and economic disadvantages resulting from the reaction by-products. The method includes synthesizing an ω-amino acid (ester) of formula R3OOC—(CH2)q—CH2NH2, in which R3 is H or an n-butyl radical and q is an integral index of between 2 and 13, from a monounsaturated fatty acid (ester) of formula (R1-CH═CH—(CH2)p-COO) xR2, in which x represents 1, 2 or 3, R1 is H or a hydrocarbon radical comprising from 4 to 11 carbon atoms and, where appropriate, a hydroxyl function, R2 is H or an alkyl radical comprising from 2 to 4 carbon atoms, and may contain one or more heteroatoms, and p is an integral index of between 2 and 11, including a reaction step of ammoniation.
摘要:
The invention relates to an alkoxyamine of formula (I) below: in which R1 may be a hydrogen atom, R2 and R3 alkyl groups, such as a methyl group, R4 a phenylene group bearing an —SO3Na group, R5 a hydrogen atom, and R6 and R7 alkyl groups, such as an ethyl group.Use of these alkoxyamines as a radical polymerization initiator.
摘要:
The present invention relates to a process for the preparation of the alkoxyamine 2-methyl-2-[N-(diethoxy-phosphoryl-2,2-dimethylpropyl)aminoxy]propionic acid or of its salts comprising a stage of saponification of an azo compound in the presence of a base, a stage of photolysis of the salt resulting from the saponification stage in the presence of N-(tert-butyl)-1-diethylphosphono-2,2-dimethylpropyl nitroxide and optionally a stage of acidification of the salt of the alkoxyamine obtained on conclusion of the photolysis stage.The alkoxyamine or its salts can be used as radical polymerization initiators.
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 present invention is directed to a process for the preparation of polyalkoxyaminies from monoalkoxyamine(s) of formula (I) and of at least one polyunsaturated compound of formula (II): and the preparation of polyfunctional living (co)polymers by polymerization by the radical route of one or more vinyl monomers in the presence of the polyalkoxyamines thus prepared.
摘要:
A method for preparing tris[(1H,1H,2H,2H-perfluoroalkyl)aryl]phosphites consists in preparing a grignard reagent from an alkoxyhalogenobenzene, then reacting it with a iodo-1H,1H,2H,2H-perfluoroalkane; transforming the alkoxy function of (1H,1H,2H,2H,2H-perfluoroalkyl)alkoxybenzene obtained into a hydroxy function, then reacting (1H,1H,2H,2H-perfluoroalkyl)hydroxybenzene with PCl3. The invention also concerns fluorinated arylphosphites and their use as transition metal ligand for making catalysts to be used in two-phase catalysis with fluorinated phase.
摘要:
A process for the preparation of octadienols, comprising the hydrodimerization reaction of 1,3-butadiene with water in the presence of a transition metal in the metal form or in the form of a compound of the said metal, of a water-soluble tertiary or quaternary phosphorus-containing compound and of at least one nitrogen-containing compound selected from the group consisting of a tertiary amine and a quaternary ammonium salt of general formula (I) or (II): ##STR1## in which R.sub.p, R.sub.q and R.sub.s are identical or different and each is a methyl or ethyl group; R.sub.r is an alkyl group containing from 6 to 22 carbon atoms; X is a counter-anion selected from the group consisting ofHCO.sub.3.sup.-, CO.sub.3.sup.2-, HSO.sub.3.sup.-, SO.sub.3.sup.2-, SiO.sub.3.sup.2-,PO.sub.4.sup.3-, HPO.sub.3.sup.2-, AsO.sub.4.sup.3-, SO.sub.4.sup.2-, HSO.sub.4.sup.-, RSO.sub.3.sup.-, RCO.sub.2.sup.-, and OH.sup.-, R being an alkyl group; the said reaction being carried out in the presence of carbon dioxide.