A cleaning composition, which is suitable for cleaning fuel delivery systems, air-intake systems, intake valves, and combustion chambers, includes at least 3 wt. % of a polyether component, at least 5 wt. % of a polar solvent, and at least 5 wt. % a non-polar solvent. The polyether component is selected from polyethers, polyetheramines, and mixtures thereof.

A cleaning agent composition for use in removing an adhesive residue, characterized in that the composition contains a quaternary ammonium salt and a composition solvent including a first organic solvent and a second organic solvent; the first organic solvent is an amide derivative represented by formula (Z) (wherein R.sup.0 represents an ethyl group, a propyl group, or an isopropyl group; and each of R.sup.A and R.sup.B represents a C1 to C4 alkyl group); the second organic solvent is a non-amide organic solvent other than the amide derivative; and the composition has a water content less than 4.0 mass %.

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The invention provides a semiconductor substrate cleaning method including a step of removing an adhesive layer provided on a semiconductor substrate by use of a remover composition, wherein the remover composition contains a solvent but no salt; and the solvent includes an organic solvent represented by formula (L) (in the formula, L represents a substituent to the benzene ring, and each of a plurality of Ls represents a C1 to C4 alkyl group; and k represents the number of Ls and is an integer of 0 to 5) in an amount of 80 mass % or more.

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The present invention relates to wash oil for use as an antifouling agent in gas compressors, in particular in cracked gas compressors, including at least one compound according to formulae (II)

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with the moieties R.sup.2 and R.sup.3 are selected from a group of linear or branched C.sub.1-C.sub.20-alkyl, C.sub.3-C.sub.10-cycloalkyl and linear or branched C.sub.1-C.sub.10-alkyl substituted C.sub.3-C.sub.10-cycloalkyl and C.sub.6-C.sub.12 aryl and C.sub.1-C.sub.10-alkyl substituted C.sub.6-C.sub.12 aryl. The moieties can be interrupted by oxygen or nitrogen. The moieties can be functionalised with hydroxyl groups or amino groups. The moieties can be the same or different. The invention relates also to the use of such wash oil as anti-fouling agent.

A cleaning agent composition for use in removing an adhesive residue, characterized in that the composition contains a quaternary ammonium salt and a composition solvent including a first organic solvent and a second organic solvent; the first organic solvent is an amide derivative represented by formula (Z) (wherein R.sup.0 represents an ethyl group, a propyl group, or an isopropyl group; and each of R.sup.A and R.sup.B represents a C1 to C4 alkyl group); the second organic solvent is a non-amide organic solvent other than the amide derivative; and the composition has a water content less than 4.0 mass %. ##STR00001##

A cleaning agent composition for use in removal of an adhesive residue, the composition containing a quaternary ammonium salt and a solvent, wherein the solvent consists of an organic solvent, and the organic solvent includes an N,N,N′,N′-tetra(hydrocarbyl)urea.

A cleaning agent composition for use in removal of a polysiloxane adhesive remaining on a substrate, the composition containing a tetrahydrocarbylammonium fluoride and an organic solvent, wherein the organic solvent contains an aromatic compound represented by formula (1) and a lactam compound represented by formula (2).

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(in formulas (1) and (2), s represents the number of substituents R.sup.100s of the benzene ring and is 2 or 3; s groups of R.sup.100s each independently represent a C1 to C6 alkyl group; the total number of carbon atoms in s groups of C1 to C6 alkyl groups is 3 or greater; R.sup.101 represents a C1 to C6 alkyl group; and R.sup.102 represents a C1 to C6 alkylene group.)

The testing of various chemicals has yielded new chemicals and chemical mixtures for the use of removing carbon deposits from the internal combustion engine. Some of these chemicals and chemical mixtures have proven to work better across many different carbon types than other chemicals that were tested. These chemical terpenes are typically produced from plants. One standard terpene mixture is known as turpentine. The chemical turpentine and chemicals found in turpentine have been determined, through our research and testing, to be extremely effective at removing the carbon that is produced within the internal combustion engine.

The testing of various chemicals has yielded new chemicals and chemical mixtures for the use of removing carbon deposits from the internal combustion engine. Some of these chemicals and chemical mixtures have proven to work better across many different carbon types than other chemicals that were tested. These chemical terpenes are typically produced from plants. One standard terpene mixture is known as turpentine. The chemical turpentine and chemicals found in turpentine have been determined, through our research and testing, to be extremely effective at removing the carbon that is produced within the internal combustion engine.

Provided herein is a cleaning composition including: from 20 to 90% by weight of dimethyl sulfoxide, from 5 to 30% by weight of at least one mineral oil (M), and from 5 to 50% by weight of at least one bipolar organic solvent (L). The ranges of proportions indicated are in each case based on the total weight of the cleaning composition. Also provided herein is a method of cleaning components by employing the cleaning composition, and also the cleaned components themselves.