87018-00-6Relevant academic research and scientific papers
ORGANIC PHOSPHORUS COMPOUND, THERMOPLASTIC RESIN COMPOSITION, AND ELECTRONIC APPARATUS
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Paragraph 0092; 0095-0096, (2021/09/17)
PROBLEM TO BE SOLVED: To provide an organic phosphorus compound that has high compatibility with a polyolefin resin and expresses flame retardancy stably for a long time in a molding of a thermoplastic resin composition comprising the polyolefin resin and
Purification method of 1-cyclohexyloxy-4-hydroxyl-2,2,6,6-tetramethyl pipradrol
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Paragraph 0024-0027, (2017/09/01)
By taking 4-hydrozyl-2,2,6,6-tetramethyl piperidine nitroxide free radical and cyclohexane as raw materials, a 1-cyclohexyloxy-4-hydroxyl-2,2,6,6-tetramethyl pipradrol coarse product synthesized through O-alkylation contains impurities such as 1-cyclohexy
Functional nitroxyls for use in delayed-onset polyolefin cross-linking
Hyslop, David K.,Parent, J. Scott
, p. 8147 - 8154 (2013/01/15)
A new approach to controlling the dynamics and yields of polyolefin radical cross-linking is described, wherein 4-acryloyloxy-2,2,6,6- tetramethylpiperidine-N-oxyl (AOTEMPO) is used to quench macroradicals in the early stages of the process and to subsequ
Oxidation of alkylcatecholboranes with functionalized nitroxides for chemical modification of cyclohexene, perallylated polyglycerol and of poly(butadiene)
Wagner, Christine B.,Studer, Armido
supporting information; experimental part, p. 5782 - 5786 (2011/01/12)
The present communication reports on the synthesis of alkoxyamines by hydroboration of olefins with catecholborane and subsequent oxidation by using nitroxides. Oxidation occurs via a radical process and the intermediately formed C-radicals are trapped by the nitroxides to form the corresponding alkoxyamines. If functionalized nitroxides are used, the method allows incorporation of interesting functional moieties via this approach. The novel method is applied for chemical modification of cyclohexene as a test substrate. More importantly, it is also shown that the reaction sequence can be used for chemical modification of macromolecules containing multiple double bonds. This is documented by successful functionalization of poly(butadiene) and of perallylated polyglycerol. Functionalized poly(butadiene)s can be prepared by a reaction sequence comprising olefin hydroboration and nitroxide induced oxidation to give poly(alkoxyamines). If the nitroxide is charged with aninteresting functional moiety such as a sugar derivative or a polyethylene glycol tail, the trapping process delivers the corresponding functionalized chemically modified poly(olefins) in a one-pot process.
Synthetic studies on N-alkoxyamines: A mild and broadly applicable route starting from nitroxide radicals and aldehydes
Schoening, Kai-Uwe,Fischer, Walter,Hauck, Stefan,Dichtl, Alexander,Kuepfert, Michael
supporting information; experimental part, p. 1567 - 1573 (2009/07/01)
A broad variety of 2,2,6,6-tetramethylpiperidine-based N-alkoxyamines were prepared in a newly found reaction. By means of a copper-catalyzed fragmentation reaction of aldehyde peroxides in the presence of TEMPO or TEMPO derivatives, N-alkoxyamines were o
A novel method for the synthesis of N-alkoxyamines starting from nitroxide radicals and ketones
Dichtl, Alexander,Seyfried, Martin,Schoening, Kai-Uwe
experimental part, p. 1877 - 1881 (2009/04/07)
A new reaction for the conversion of stable nitroxide radicals into the corresponding N-alkoxyamines by means of a copper-catalyzed ketone-hydrogen peroxide reaction is reported. Georg Thieme Verlag Stuttgart.
PROCESS FOR THE PREPARATION OF STERICALLY HINDERED NITROXYL ETHERS
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Page/Page column 29-30, (2008/06/13)
The present invention relates to a novel process for the preparation of a sterically hindered nitroxyl ether from the corresponding sterically hindered nitroxyl radical by reacting it with a carbonyl compound and a hydroperoxide. The compounds prepared by this process are effective stabilizers for polymers against harmful effects of light, oxygen and/or heat, as flame-retardants for polymers and as polymerization regulators.
HYDROGEN PEROXIDE CATALYZED PROCESS FOR THE PREPARATION OF STERICALLY HINDERED N-HYDROCARBYLOXYAMINES
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Page/Page column 33-34, (2010/02/10)
Sterically hindered N-hydrocarbyloxyamines (I) are prepared from hindered amine N-oxyl compounds (II) by a process which uses peroxide or a hydrogen peroxide equivalent, a catalytic amount of a peroxide decomposing transition metal salt, metal oxide, or metal-ligand complex, a hydrocarbon solvent containing no activated hydrogen atoms, and an inert cosolvent, These compounds are useful as thermal and light stabilizers for a variety of organic substrates.
CANDLE WAX STABILIZED BY A COMBINATION OF UV ABSORBER PLUS A SELECTED HINDERED AMINE
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, (2008/06/13)
Candle wax containing a combination of a UV absorber, preferably a benzotriazole, in combination with a hindered amine which is substituted on the N-atom by an alkoxy, a cycloalkoxy or an hydroxy-substituted alkoxy moiety is surprising better stabilized than candle wax which contains a combination of a UV absorber and a conventional hindered amine where the N-atom is substituted by hydrogen or alkyl.
Non-migrating 1-hydrocarbyloxy hindered amine derivatives as polymer stabilizers
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, (2008/06/13)
1-Hydrocarbyloxy substituted hindered amine compounds which also contain a reactive functional group such as hydroxy, amino, oxirane or carboxyl can be chemically attached to selected polymer substrates by condensation reactions to give polymers containing a chemically-bonded, non-migrating stabilizer having excellent stabilization efficacy for protecting said polymer substrate from the adverse effects of actinic light.
