Patent ID: 8431653

Claim:
A curing agent composition for epoxy resins comprising the following components (A), (B) and (C): (A) a polyamine compound which is a reaction product of a glycidyl compound selected from the group consisting of a bisphenol A-type epoxy resin and a bisphenol F-type epoxy resin with 1,3-bis (aminomethyl)cyclohexane, wherein said glycidyl compound and 1,3-bis (aminomethyl)cyclohexane satisfy the formula [D]/[G]=20−4, wherein [D] represents the number of active hydrogen atoms of 1,3-bis(aminomethyl)cyclohexane and [G] represents the number of epoxy groups of the glycidyl compound, (B) a polyether-modified polysiloxane having a surface tension in the range of 19.0 dyne/cm to 25.0 dyne/cm, and (C) an amino group-modified polysiloxane having a total amine value in the range of 150 mgKOH/g to 650 mgKOH/g, wherein the content of said component (B) is 0.1 to 2.0% by weight based upon the total amount of the components (A), (B) and (C), and the content of said component (C) is 0.5 to 3.0% by weight based upon the total amount of the components (A), (B) and (C).