LUBRICATING OIL ADDITIVE COMPOSITION AND LUBRICATING OIL COMPOSITION

• Main Authors: KATO, Shota, YOSHIDA, Yukio, KAMIMURA, Hideto
• Format: Patent
• Language: English; French; German
• Published: 24.04.2024
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; FUELS; INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATINGCOMPOSITIONS; LUBRICANTS; LUBRICATING COMPOSITIONS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION

Aproblem to be solved to provide a lubricating oil additive composition that is suitable as a load bearing additive, and is excellent in wear resistance, extreme pressure property, and thermal stability, and a lubricating oil composition containing the lubricating oil additive composition. The problem is solved by a lubricating oil additive composition containing a poly(meth)acrylate-based copolymer (X) containing a structural unit (a) derived from a particular alkyl (meth)acrylate (A), a structural unit (b) derived from a particular hydroxy group-containing (meth)acrylate (B), and a structural unit (c) derived from a particular phosphorus-containing (meth)acrylate (C).