Abstract: The invention relates to copolymers of formula (I) wherein R1 is hydrogen, a C1-C5-alkyl radical or C2-C5-alkenyl radical which can also contain heteroatoms, an acid group or an aliphatic or aromatic group comprising 1-50 carbon atoms, including an acid group, R2 and R3 independently represent hydrogen, methyl and/or ethyl, n ranges from 0-100, and m ranges from 3 to 30, and k ranges from 1-200, and A is hydrogen, an acid group, a C1-C5-alkyl radical or a C2-C8-alkenyl radical which can also contain heteroatoms, an aliphatic or aromatic group comprising 1-50 carbon atoms, including an acid group, or a copolymer unit of formula (II), wherein R4 is hydrogen, a C1-C5-alkyl radical or a C2-C5-alkenyl radical which can also contain heteroatoms, an acid group or an aliphatic or aromatic group comprising 1-50 carbon atoms, including an acid group, R5 is hydrogen, methyl and/or ethyl, x ranges from 0 to 100, and y ranges from 3-30, wherein, if A is formula (2), R1 represents hydrogen or an acid group.

Abstract: The invention relates to a method for producing pure alpha-alkoxy-?-hydroxy-polyalkylene glycols, creating small impurities of the product on high-molecular a-?-di-hydroxy-polyalkylene glycols. The method is based on the use of high-boiling initiator alcohols of the following general structure R2—(OCH2CHR)k—OH wherein R2 represents an alkyl radical comprising between 1 and 4 C atoms, preferably R2?CH3, k represents a number between 1 and 10, preferably between 1 and 4, and R represents H, CH3 or an alkyl radical comprising between 2 and 4 C atoms, preferably R?H, CH3. The use of the cited initiator alcohols enables the mixture of a basic catalyst and an initiator alcohol to be dried in such a way that it has a very low water content, and thus to produce very low concentrations of unwanted a-?-di-hydroxy-polyalkylene glycol impurities.

Abstract: The present invention relates to a process for preparing esters of ?,?-ethylenically unsaturated carboxylic acids with polyalkylene glycols, by reacting an ?,?-ethylenically unsaturated carboxylic acid or reactive derivative thereof with a C2- to C4-alkylene oxide or a mixture of such alkylene oxides, wherein this reaction takes place in the presence of from 10 to 10 000 ppm, based on the weight of the ?,?-ethylenically unsaturated carboxylic acid used, of either 2,2,6,6-tetramethylpiperidine 1-oxyl or 4-hydroxy-2,2,6,6-tetramethylpiperidine 1-oxyl.

Abstract: The invention relates to a method for producing pure alpha-alkoxy-?-hydroxy-polyalkylene glycols, creating small impurities of the product on high-molecular a-?-di-hydroxy-polyalkylene glycols. The method is based on the use of high-boiling initiator alcohols of the following general structure R2—(OCH2CHR)k—OH wherein R2 represents an alkyl radical comprising between 1 and 4 C atoms, preferably R2=CH3, k represents a number between 1 and 10, preferably between 1 and 4, and R represents H, CH3 or an alkyl radical comprising between 2 and 4 C atoms, preferably R=H, CH3. The use of the cited initiator alcohols enables the mixture of a basic catalyst and an initiator alcohol to be dried in such a way that it has a very low water content, and thus to produce very low concentrations of unwanted a-?-di-hydroxy-polyalkylene glycol impurities.

Abstract: The present invention provides a process for preparing polyalkylene glycols by reacting a mixture of a mono- or polyhydric alcohol and a polyalkylene glycol prepolymer with a C2- to C4-alkylene oxide or a mixture of such alkylene oxides in the presence of a catalyst which comprises Zn3[Co(CN)6]2, the mono- or polyhydric alcohol having a molecular weight of up to 500 g/mol and containing from 1 to 20 carbon atoms and from 1 to 10 hydroxyl groups, and the polyalkylene glycol prepolymer being the addition product of a C2- to C4-alkylene oxide or of a mixture of such alkylene oxides in an amount of at least 500 g/mol to a mono- or polyhydric alcohol having from 1 to 20 carbon atoms and from 1 to 10 hydroxyl groups.

Abstract: The invention relates to copolymers of formula (I) wherein R1 is hydrogen, a C1-C5-alkyl radical or C2-C5-alkenyl radical which can also contain heteroatoms, an acid group or an aliphatic or aromatic group comprising 1-50 carbon atoms, including an acid group, R2 and R3 independently represent hydrogen, methyl and/or ethyl, n ranges from 0-100, and m ranges from 3 to 30, and k ranges from 1-200, and A is hydrogen, an acid group, a C1-C5-alkyl radical or a C2-C8-alkenyl radical which can also contain heteroatoms, an aliphatic or aromatic group comprising 1-50 carbon atoms, including an acid group, or a copolymer unit of formula (II), wherein R4is hydrogen, a C1-C5-alkyl radical or a C2-C5-alkenyl radical which can also contain heteroatoms, an acid group or an aliphatic or aromatic group comprising 1-50 carbon atoms, including an acid group, R5 is hydrogen, methyl and/or ethyl, x ranges from 0 to 100, and y ranges from 3-30, wherein, if A is formula (2), R1 represents hydrogen or an acid group.

Abstract: Disclosed are the use of compounds of formula 1, R1[(I[CH2LK—0]—(A-O)n—(B—O)m—R2]q (1), in which R1 represents an aromatic radical with 6 to 18 carbon atoms, R2 represents hydrogen, C1 to C18 alkyl, or C6 to C18 aryl, A represents an ethylene radical, B represents an isopropylene radical, k represents zero, 1, or 2, (n+m) represents a number between 3 and 20, n being at least 1, and q represents 2, 3, or 4, and in which the sequence of ethylene units and propylene units is statistical if m and n are both larger than zero, as a basic oil for formulating lubricants, and corresponding lubricants.