| 摘要 |
PURPOSE:To obtain a vibration-damping material excelling in vibration-damping properties in a wide range from a low-frequency to a high frequency and being lightweight and capable of sticking to a curved surface by mixing a specified epoxy resin with a specified monoglycidyl ether, a specified polyamide resin and a specified carbon fiber or graphite and molding and curing the mixture at an elevated temperature. CONSTITUTION:An epoxy resin (A) flowable at room temperature to 100 deg.C [e.g. Epikote 828 (a product of Yuka Shell Chem. K.K.)] is mixed with 5-45 pts.wt., per 100 pts.wt. resin A, compound (E) of formula I [wherein R is CnH2n+1 (wherein n is 1-22) or a group of formula II, and R<1> is CnH2n+1(wherein n is 0-22)] (a glycidyl ether in which R is a 10C or higher alkyl is desirable because of its nontoxicity), a polyamide resin (C) flowable at room temperature to 100 deg.C [e.g. Tohmide #225-X (a product of Fuji Kasei K.K.)] and 30-120 pts.wt., per 100 pts.wt. composition comprising components A, B and C, carbon fiber of a fiber length of 101000mum and/or graphite of an aspect ratio of 3-70, and the obtained mixture is molded and cured it an elevated temperature of room temperature to 100 deg.C to a hardness of 40-95 as measured at 20 deg.C with an Asker hardness meter. In this way, a vibation-damping material can be obtained. |
