TWI443137B

A thermosetting resin composition having rubbery polymer particles dispersed therein of the present invention, that does not precipitate the thermosetting resin rubbery polymer particles over a long period of time, has excellent fluidity, is easily cured and molded, and sufficiently exhibits original properties of the thermosetting resin, comprises 100 parts by weight of a thermosetting resin, and 1 to 80 parts by weight of rubbery polymer particles, the rubbery polymer particles being dispersed in the form of a primary particle, wherein the solid content concentration is 60% to 90% by weight, and the water concentration is 3% by weight or less, and can efficiently be produced industrially in the state that the rubbery polymer particles are maintained in a stable state. The composition can be produced by a process for production of a thermosetting resin composition having rubbery polymer particles dispersed therein of the present invention, comprising a concentration step of deaerating a gas phase adjacent to