摘要:
Polyurethanes, suitable as thickeners for aqueous systems, are obtained by reacting (i) one or more hydrophilic polyols containing at least two OH groups and at least two functional groups selected from ether and ester groups, having a molecular weight of at least 300 Daltons; (ii) one or more C8 to C36 Guerbet alcohols, which are produced from monoalcohols having 4 to 18 carbon atoms selected from the group of primary and/or secondary monoalcohols of formula (MA), where (a) the total number of carbon atoms in compounds (MA) is 4 to 18; (b) R1, R2 and R3 are independently hydrogen, or linear, branched or alicyclic, saturated or unsaturated alkyl; (c) optionally, R1 and R2, and/or R1 and R3, and/or R2 and R3 are linked together to form an alicyclic substructure; and (d) compounds (MA) have at least one branch; and (iii) one or more at least difunctional isocyanates.
摘要:
The invention relates to sulfosuccinates of the general formula (1), where M is hydrogen or a cation and the groups R4 and R5—independently of each other—are hydrogen or a cation or an alkyl group, wherein no more than one of the groups R4 or R5 is hydrogen or a cation, wherein said sulfosuccinates contain at least one alcohol building block that is assigned to the mono-alcohols with 8 to 36 carbon atoms in total, on the condition that said mono-alcohols are Guerbet alcohols (GA) containing at least two branches per molecule. Said sulfosuccinates are suitable as surfactants having improved dynamic surface tension.
摘要:
The invention relates to a method for the dimerization of alcohols in the context of a Guerbet reaction, in which one or more alcohols (A) having 2 to 72 C atoms and 1 to 3 OH groups per molecule are reacted in the presence of (a) a base (B), (b) a carbonyl compound (C), and (c) a hydrogenation catalyst (H) from the group of metals ruthenium, rhodium, palladium, osmium, iridium, and platinum, said metals being in the elementary form, with the proviso that the alcohols (A) have at least one primary or secondary OH group, and that a C atom that carries at least one H atom as a substituent is directly adjacent to the C atom with said primary or secondary OH group.
摘要:
Suggested are alkoxylation products of 2-isopropyl-5-methyl-hexan-1-ol in which AO stands for an ethylene oxide, propylene oxide or butylenes oxide unit or their mixtures and n denominates an integer of from 1 to 100.
摘要:
Suggested are alkoxylation products of 2-isopropyl-5-methyl-hexan-1-ol in which AO stands for an ethylene oxide, propylene oxide or butylenes oxide unit or their mixtures and n denominates an integer of from 1 to 100.
摘要:
The present invention relates to nanoemulsions comprising alkyl and/or alkenyl ethers of alkyl and/or alkenyl (poly)glycosides, to a method for their preparation and also to their use. The present invention further relates to the alkyl and/or alkenyl ethers of alkyl and/or alkenyl (poly)glycosides themselves, and their use.
摘要:
The invention relates to a method for the dimerization of alcohols in the context of a Guerbet reaction, in which one or more alcohols (A) having 2 to 72 C atoms and 1 to 3 OH groups per molecule are reacted in the presence of (a) a base (B), (b) a carbonyl compound (C), and (c) a hydrogenation catalyst (H) from the group of metals ruthenium, rhodium, palladium, osmium, iridium, and platinum, said metals being in the elementary form, with the proviso that the alcohols (A) have at least one primary or secondary OH group, and that a C atom that carries at least one H atom as a substituent is directly adjacent to the C atom with said primary or secondary OH group.
摘要:
Suggested is an improved process for making polyol esters with improved colour quality by transesterification of polyols or their alkoxylation products with fatty acid alkyl esters, which is characterised in that the reaction is carried out in the presence of a reducing mineral or organic acid as a catalyst selected from the group consisting of (i) sulphuric or sulphonic acids with an oxidation value of sulphur of less than 6 or their salts, and/or (ii) phosphoric or phosphonic acids with an oxidation value of phosphor of less than 5 or their salts.
摘要:
Disclosed is a process for the preparation of active substance concentrates, which is distinguished in that an active-substance-containing starting material, (i) (a) is either brought into contact with a PIT emulsion and the mixtures are heated to a temperature above the phase inversion temperature of the PIT emulsion, where they are held for a sufficient period of time, or (b) is brought into contact with an aqueous mixture of lipids and emulsifiers, which mixture is suitable for the formation of PIT emulsions, and the mixture is heated with strong shearing to a temperature above the phase inversion temperature with in-situ formation of a PIT emulsion, where the mixture is held for a sufficient period of time, (ii) the mixtures are cooled and filtered and, if appropriate, (iii) subjected to ultrafiltration and/or (iv) a further solvent extraction.
摘要:
Disclosed is a process for the preparation of active substance concentrates, which is distinguished in that an active-substance-containing starting material, (i) (a) is either brought into contact with a PIT emulsion and the mixtures are heated to a temperature above the phase inversion temperature of the PIT emulsion, where they are held for a sufficient period of time, or (b) is brought into contact with an aqueous mixture of lipids and emulsifiers, which mixture is suitable for the formation of PIT emulsions, and the mixture is heated with strong shearing to a temperature above the phase inversion temperature with in-situ formation of a PIT emulsion, where the mixture is held for a sufficient period of time, (ii) the mixtures are cooled and filtered and, if appropriate, (iii) subjected to ultrafiltration and/or (iv) a further solvent extraction.