Thermosetting resin composition, epoxy resin molding material, and polyvalent carboxylic acid condensate

A thermosetting resin composition comprising (A) an epoxy resin and (B) a curing agent, wherein the viscosity of the (B) curing agent is 1.0-1000 mPa·s at 150° C., as measured with an ICI cone-plate Brookfield viscometer.

A thermosetting resin composition comprising (A) an epoxy resin and (B) a curing agent,

• wherein the (B) curing agent contains a polyvalent carboxylic acid condensate with a component represented by the following formula (1):
• (In formula (1), Rx represents a divalent organic group, multiple Rx groups in the same molecule can be the same or different, Ry represents a monovalent organic group and the two Ry groups in the same molecule can be the same or different, and n1 represents an integer of 1 or greater.)

A polyvalent carboxylic acid condensate comprising a component represented by the following formula (I):

• (In formula (I), Rx is a divalent group with an aliphatic hydrocarbon ring, wherein the aliphatic hydrocarbon ring is optionally substituted with a halogen atom or a straight-chain or branched hydrocarbon group, multiple Rx groups in the same molecule can be the same or different, Ry is a monovalent hydrocarbon group optionally substituted with an acid anhydride or carboxylic acid ester group, the two Ry groups in the same molecule can be the same or different and n1 represents an integer of 1 or greater.)

A polyvalent carboxylic acid condensate containing a component represented by the following formula (1a):

• (In formula (1a), m represents an integer of 0-4, Rz represents a halogen atom or straight-chain or branched C1-4 hydrocarbon group, when m is 2-4 the multiple Rz groups can be the same or different and linked together to form a ring, and n1 represents an integer of 1 or greater.)

A method for producing a polyvalent carboxylic acid condensate, comprising a step of intermolecular dehydrating condensation between the carboxyl groups in a reaction mixture containing a polyvalent carboxylic acid represented by the following formula (5) and a monocarboxylic acid represented by the following formula (6):

• (In formulas (5) and (6), Rx represents a divalent group with an aliphatic hydrocarbon ring, wherein the aliphatic hydrocarbon ring is optionally substituted with a halogen atom or a straight-chain or branched hydrocarbon group, and Ry represents a monovalent hydrocarbon group optionally substituted with an acid anhydride or carboxylic acid ester group.)