| 摘要 |
PROBLEM TO BE SOLVED: To provide an epoxy resin curing agent providing a cured product excellent in various physical properties such as coating film appearance, water resistance, adhesion, and low temperature curability.SOLUTION: This epoxy resin curing agent comprises the following polyamine compounds (A) and (B) and is produced by blending 100 pts.wt. of (A) and 5-50 pts.wt. of (B): (A) a polyamine compound which is a condensation-polymerization product of 1,3-bis(aminomethyl)cyclohexane, phenol and/or a phenol having a 1C-12C alkyl group, and formaldehyde, and in which the reaction ratio between 1,3-bis(aminomethyl)cyclohexane and phenol and/or a phenol having a 1C-12C alkyl group (=[amount of substance of phenol and/or a phenol having 1C-12C alkyl group]/[amount of substance of 1,3-bis(aminomethyl)cyclohexane]) is in a range of 0.9-1.5 and the reaction ratio between 1,3-bis(aminomethyl)cyclohexane and formaldehyde (=[amount of substance of formaldehyde]/[amount of substance of 1,3-bis(aminomethyl)cyclohexane]) is in a range of 0.5-1.2; and (B) a polyamine compound represented by the formula: (R)N-HC-A-CH-NHR (where A is a phenylene group; R is a hydrogen atom or a phenethyl group; and Rs may be the same as or different from each other and at least one of Rs is a phenethyl group). |
