Abstract:
What is described is a process for preparing functionalized polyisobutenes, in which isobutene or an isobutene-containing monomer mixture is polymerized in the presence of a Lewis acid and of an initiator, and the polymerization is terminated with a mixture of a phenol and a Lewis acid and/or a Brønsted acid. The terminal phenol groups can be derivatized or reduced to cyclohexanol systems.
Abstract:
The use of tetrahydrobenzoxazines I where R1 is a hydrocarbyl radical and R2, R3, R4 and R5 are each independently hydrogen atoms, hydroxyl groups or hydrocarbyl radicals, and where R2 to R5 may also form a second and a third tetrahydrooxazine ring, with the proviso that at least one of the substituents has from 4 to 3000 carbon atoms and the remaining substituents, when they are hydrocarbyl radicals, each have from 1 to 20 carbon atoms, as stabilizers for stabilizing inanimate organic material, especially turbine fuels, against the action of light, oxygen and heat.
Abstract:
A synergistic mixture comprising from 1 to 99.9% by weight of compounds having structural elements (I) in which the free valencies on the oxygen atom and on the nitrogen atom may be combined to form a five-, six- or seven-membered ring and the benzene ring may also bear substituents at one or more of the free positions, and from 0.1 to 99% by weight of sulfur-containing organic compounds with antioxidant action. This synergistic mixture is suitable as a stabilizer for stabilizing inanimate organic material, especially mineral oil products and fuels, against the action of light, oxygen and heat.
Abstract:
A process for producing a composite material comprising a) at least one (semi)metallic phase and b) at least one organic polymer phase, comprising the copolymerization of at least one aryloxy (semi)metallate and/or aryloxy ester of a nonmetal which forms oxo acids, the nonmetal being different than carbon and nitrogen, (compound I) with at least one ketone, formaldehyde and/or formaldehyde equivalent (compound II) in the presence of at least one (semi)metal compound which is not an aryloxy (semi)metallate, (compound III), where the weight of (semi)metal in compound III is at least 5% by weight based on the weight of compound I.