Abstract: A process for preparing polyisobutenyl (thio)ethers by reacting a polyisobutene epoxide having at least one terminal epoxide group with itself, with other epoxides and/or with nucleophiles selected from among alcohols and thiols in the presence of a Lewis-acid compound as catalyst and/or a cationic photoinitiator with illumination is described. The side reaction of the rearrangement of the epoxide to the polyisobutenyl aldehyde is suppressed. In addition, a curable composition comprising a polyisobutene epoxide, an epoxide different therefrom and optionally a poly(thi)ol is also described.

Abstract: Formulations for treating metal surfaces, especially for corrosion protection, at least comprising a polyisobutylene modified by terminal polar groups and also a solvent or solvent mixture. Process for treating metal surfaces by contacting them with said formulation, and coated metal surfaces.

Abstract: ?-Chloroisopropyl-substituted aromatics are obtained in high yield by treating isopropenyl-substituted aromatics with hydrogen chloride gas in the absence of a solvent. The ?-chloroisopropyl-substituted aromatics serve as initiators for the cationic polymerization of isobutene.

Abstract: Polyisobutenamines of the formula I: R—X ??(I) where R is a polyisobutenyl radical having a number average molecular weight {overscore (M)}n of from 500 to 1 500 and a polydispersity {overscore (M)}w/{overscore (M)}n of less than 1.4 and X is an organic radical having amino groups, are prepared and are used as detergent additives in fuel compositions. Additive concentrates contain at least one polyisobutenamine in an amount of from 0.1 to 80% by weight.

Abstract: Polyisobutenylphenols are prepared by alkylating an aromatic hydroxy compound with substantially monoethylenically unsaturated and substantially homopolymeric polyisobutenes in the presence of a Lewis acid alkylation catalyst by a process in which the polyisobutenes have a ? double bond content of at least 35 mol %.

Abstract: The invention relates to explosive compositions comprising, in a water-in-oil emulsion as emulsifier, a Mannich adduct composed of a) a hydrocarbyl-substituted, hydroxyaromatic compound of the formula I (R1)nAr(OH)x ??(I) in which R1 is a hydrocarbyl group selected from a straight-chain or branched C6-C400-alkyl, C6-C400-alkenyl, C6-C400-alkenyl-aryl or C6-C400-alkyl-aryl radical; Ar is a mononuclear or polynuclear, optionally substituted aromatic ring; n is an integral value of 1, 2 or 3; and x is an integral value of 1 and 5; b) formaldehyde, an oligomer or polymer thereof; and c) a nitrogen compound selected from an amine having at least one primary or secondary amino function, and ammonia.

Abstract: The present invention relates to a process for preparing an isobutene polymer using a cyclopentene derivative as initiator and to the isobutene polymer obtainable by means of the process and to particular functionalization products thereof.

Abstract: Polyisobutenylphenols are prepared by alkylating an aromatic hydroxy compound with substantially monoethylenically unsaturated and substantially homopolymeric polyisobutenes in the presence of a Lewis acid alkylation catalyst by a process in which an ether is additionally used as a cocatalyst, the ether having a molecular weight of at least 102 g/mol in the case of BF3 as the Lewis acid.

Abstract: The invention describes polyisobutenyl derivatives of succinic acid obtainable by: i) reacting a polyisobutene which has a reactive end group content of at least 80% and whose molecular weight distribution is characterized by a maximum Mp in the distribution curve in the range from 500 to 20 000 daltons and a ratio of weight average molecular weight to number average molecular weight MW/MN of below 1.4 with maleic acid or maleic anhydride; ii) reacting the polyisobutene-succinic acid derivative obtained in i) with at least one compound I which has at least one primary or secondary amino group and/or an OH group to form an amide or ester bond, and also a process for preparing them and their use as additives in lubricant compositions.

Abstract: A polymer composition comprises at least one polyisobutene-containing component based on a medium molecular weight, reactive polyisobutene and at least one further polymer which is different therefrom.

Abstract: A process for purifying a phenol derivative selected from alkylphenols having a number average molecular weight of from 200 to 4 000 and Mannich adducts thereof is described, in which the phenol derivative is brought into intimate contact with an extracting agent having a polarity ET(30) of from 57 to 38 kcal/mol, a phase containing the phenol derivative and an extracting agent phase are allowed to separate from one another and the extracting agent phase is removed.

Abstract: A process for preparing polyisobutenyl (thio)ethers by reacting a polyisobutene epoxide having at least one terminal epoxide group with itself, with other epoxides and/or with nucleophiles selected from among alcohols and thiols in the presence of a Lewis-acid compound as catalyst and/or a cationic photoinitiator with illumination is described. The side reaction of the rearrangement of the epoxide to the polyisobutenyl aldehyde is suppressed. In addition, a curable composition comprising a polyisobutene epoxide, an epoxide different therefrom and optionally a poly(thi)ol is also described.

Abstract: Compounds, in particular those based on polyisobutyleneamines, are suitable as emulsifiers for water-in-oil emulsions and are used in particular as additives for fuels and lubricants.

Abstract: Alkoxylated alkylphenols which have at least one long-chain alkyl radical having at least one tertiary or quaternary carbon atom are prepared and are used as fuel or lubricant additives in fuel and lubricant compositions.

Abstract: Polyisobutenes in which at least 60 mol % of the polymer chains have at least one olefinically unsaturated terminal group are prepared by cationic polymerization of isobutene or isobutene-containing monomer mixtures in the condensed phase by a process in which the polymerization is carried out in the presence of an initiator system comprising

Abstract: Linear or star block copolymers which have at least one polymer block A which is essentially composed of isobutene units and at least two polymer blocks B which are essentially composed of units which are derived from vinylaromatic monomers are used as resilient sealing material. In particular, such sealing materials are used for sealing the edge joints in insulation glass panes, and insulation glass panes have a flexible edge joint seal which contains one of the block copolymers.

Abstract: Polyisobutenylphenols are prepared by alkylating an aromatic hydroxy compound with substantially monoethylenically unsaturated and substantially homopolymeric polyisobutenes in the presence of a Lewis acid alkylation catalyst by a process in which the polyisobutenes have a &bgr; double bond content of at least 35 mol %.

Abstract: This invention relates to dispersant compositions, comprising a Mannich adduct as emulsifier in a water in oil emulsion, from a) a hydroxyaromatic compound with hydrocarbon substituent(s) of formula (I) (R1)nAr(OH)x, where R1=a hydrocarbon, chosen from a straight or branched-chain C6-C400alkyl, C6-C400alkenyl, C6-C400alkenylaryl, or C6-C400alkylaryl group; Ar=a mono- or multi-nuclear, optionally substituted aromatic ring; n=1, 2 or 3; and x=1 to 5; b) formaldehyde, an oligomer or polymer thereof; and c) a nitrogen compound, chosen from an amine and ammonia, comprising at least one primary or secondary amino function.

Abstract: A process for the preparation of dicyanobenzenes of the formula ##STR1## in which x denotes hydroxy, C.sub.1 -C.sub.4 alkoxy, nitro, amino, mono- or di-(C.sub.1 -C.sub.4 alkyl)amino, phthalimido or a nitrogenous saturated 5-membered or 6-membered heterocyclic radical, which is attached to the phenyl ring via a nitrogen atomin which a xylene of the formula ##STR2## in which x has the meaning stated above,is oxidized at a temperature of from 400.degree. to 500.degree. C. with oxygen in the presence of ammonia and a catalyst.

Abstract: Dye mixtures useful for dyeing or printing textile fibers or fabrics contain from 40 to 75% by weight, based on the weight of the dyes, of a dye of the formula ##STR1## where R is C.sub.1 -C.sub.4 -alkyl and n is 1 and from 25 to 60% by weight, based on the weight of the dyes, of a dye of the abovementioned formula where R is C.sub.1 -C.sub.4 -alkyl and n is 2.