High-molecular-weight compound and method for producing same, composition and method for producing same, resin composition, additive for lubricating oil, and lubricating oil

An additive for a lubricating oil, wherein the additive for a lubricating oil comprises a high-molecular-weight compound,

• the high-molecular-weight compound comprising:
• a plurality of polymer chains linked through a divalent or higher-valent linking group and having a moiety derived from a polyfunctional thiol compound (A) and a moiety derived from a compound (B) having a reactive group that reacts with a thiol group,
• wherein the divalent or higher-valent linking group has a thiol group and at least one of a thioether structure and a thiourethane structure,
• a ratio of an absolute weight-average molecular weight to a relative weight-average molecular weight (absolute Mw/relative Mw) of the high-molecular-weight compound is 1.25 or more, and
• a relative Mw of the high-molecular-weight compound is 15,000 or more and 45,000 or less,
• the high-molecular-weight compound satisfies Formulae (11) and (12),
• r×(fA−1)×(fB−1)<1.2 (11)
• r=(fB×y)/(fA×x) (12)
• wherein, in Formula (11), fA is an average number of thiol groups per molecule of the polyfunctional thiol compound (A), fB is an average number of reactive groups per molecule of the compound (B), fA is 2.0 or more and fB is 1.2 or more, provided that a case where only the compound (A) having two thiol groups and only the compound (B) having two reactive groups are used is excluded, and r is a value calculated by Formula (12) when a molar ratio of the moiety derived from the polyfunctional thiol compound (A) to the moiety derived from the compound (B) is defined as x:y.

A high-molecular-weight compound comprising a plurality of polymer chains linked through a divalent or higher-valent linking group and having a moiety derived from a polyfunctional thiol compound (A) and a moiety derived from a compound (B) having a reactive group that reacts with a thiol group,

• wherein the divalent or higher-valent linking group has a thiol group and at least one of a thioether structure and a thiourethane structure,
• a ratio of an absolute weight-average molecular weight to a relative weight-average molecular weight (absolute Mw/relative Mw) of the high-molecular-weight compound is 1.25 or more and 2.10 or less, and
• a relative Mw of the high-molecular-weight compound is 15,000 or more and 350,000 or less,
• the high-molecular-weight compound satisfies Formulae (11) and (12),
• r×(fA−1)×(fB−1)<1.2 (11)
• r=(fB×y)/(fA×x) (12)
• wherein, in Formula (11), fA is an average number of thiol groups per molecule of the polyfunctional thiol compound (A), fB is an average number of reactive groups per molecule of the compound (B), fA is 2.0 or more and fB is 1.2 or more, provided that a case where only the compound (A) having two thiol groups and only the compound (B) having two reactive groups are used is excluded, and r is a value calculated by Formula (12) when a molar ratio of the moiety derived from the polyfunctional thiol compound (A) to the moiety derived from the compound (B) is defined as x:y.

A high-molecular-weight compound comprising a plurality of polymer chains linked through a divalent or higher-valent linking group and having a moiety derived from a polyfunctional thiol compound (A) and a moiety derived from a compound (B) having a reactive group that reacts with a thiol group,

• wherein the divalent or higher-valent linking group has a thiol group and at least one of a thioether structure and a thiourethane structure,
• a ratio of an absolute weight-average molecular weight to a relative weight-average molecular weight (absolute Mw/relative Mw) of the high-molecular-weight compound is 1.25 or more and 2.00 or less, and
• a relative Mw of the high-molecular-weight compound is 15,000 or more and 350,000 or less,
• the high-molecular-weight compound satisfies Formulae (11) and (12),
• r×(fA−1)×(fB−1)<1.2 (11)
• r=(fB×y)/(fA×x) (12)
• wherein, in Formula (11), fA is an average number of thiol groups per molecule of the polyfunctional thiol compound (A), fB is an average number of reactive groups per molecule of the compound (B), fA is 2.0 or more and fB is 1.2 or more, provided that a case where only the compound (A) having two thiol groups and only the compound (B) having two reactive groups are used is excluded, and r is a value calculated by Formula (12) when a molar ratio of the moiety derived from the polyfunctional thiol compound (A) to the moiety derived from the compound (B) is defined as x:y.

A high-molecular-weight compound comprising a plurality of polymer chains linked through a divalent or higher-valent linking group and having a moiety derived from a polyfunctional thiol compound (A) and a moiety derived from a compound (B) having a reactive group that reacts with a thiol group,

• wherein the divalent or higher-valent linking group has a thiol group and at least one of a thioether structure and a thiourethane structure,
• a ratio of an absolute weight-average molecular weight to a relative weight-average molecular weight (absolute Mw/relative Mw) of the high-molecular-weight compound is 1.25 or more and 1.95 or less, and
• a relative Mw of the high-molecular-weight compound is 15,000 or more and 350,000 or less,
• the high-molecular-weight compound satisfies Formulae (11) and (12),
• r×(fA−1)×(fB−1)<1.2 (11)
• r=(fB×y)/(fA×x) (12)
• wherein, in Formula (11), fA is an average number of thiol groups per molecule of the polyfunctional thiol compound (A), fB is an average number of reactive groups per molecule of the compound (B), fA is 2.0 or more and fB is 1.2 or more, provided that a case where only the compound (A) having two thiol groups and only the compound (B) having two reactive groups are used is excluded, and r is a value calculated by Formula (12) when a molar ratio of the moiety derived from the polyfunctional thiol compound (A) to the moiety derived from the compound (B) is defined as x:y.