| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lubricant base oil that is excellent in water solubility and lubricity. <P>SOLUTION: The lubricant base oil contains a polyhydric alcohol-alkylene oxide adduct (A) represented by general formula (1) and having an HLB of 7.0-11.0 and a number average molecular weight of 1,000-6,000, and a lubricant composition contains the lubricant base oil and water as essential components [in the general formula (1), Z represents a residue formed by removing f pieces of hydroxyl groups from tri- to hexavalent alcohol; A<SP POS="POST">1</SP>O represents an oxybutylene group; A<SP POS="POST">2</SP>O represents an oxyetylene group; A<SP POS="POST">3</SP>O represents an oxypropylene group; m is an average addition molar number of butylene oxide or tetrahydrofuran of 8-58; n is an average addition molar number of ethylene oxide of 4-70; k is an average addition molar number of propylene oxide of 0-30; and the oxybutylene (A<SP POS="POST">1</SP>O) and the oxyethylene (A<SP POS="POST">2</SP>O) may be bonded at random or in a block form]. <P>COPYRIGHT: (C)2013,JPO&INPIT |
