CLOGGING INHIBITOR FOR OIL FILTERS, METHOD FOR INHIBITING THE CLOGGING OF OIL FILTERS AND ENGINE OIL COMPOSITIONS CONTAINING THE INHIBITOR

摘要

Disclosed are an agent for preventing clogging of oil filters for various internal combustion engines, the agent comprising at least one hydroxyl-containing component selected from the group consisting of: compounds represented by the formula (1) R<1>O- (R<2>O) m-H (1) wherein R<1> is hydrogen or C1 to C8 alkyl, R<2> is C2 to C10 alkylene, m is an integer of 1 to 10, and when m is 2 or more, the two or more R<2> groups may be the same or different; and compounds represented by the formula (2) <CHEM> wherein R<3> is C2 to C4 alkylene, R<4> is hydrogen or C1 to C10 alkyl, n is an integer of 0 to 8, and when n is 2 or more, the two or more R<3> groups may be the same or different; a method for preventing oil filter clogging using the oil filter clogging preventing agent, and an engine oil composition containing the oil filter clogging preventing agent.