| abstract |
(57) [Problem] To provide an unsaturated polyester resin for FRP waterproofing, which has the same performance as the conventional one and can effectively use recovered PET, and its use. SOLUTION: An unsaturated polyester resin for FRP waterproofing is obtained by using recovered polyethylene terephthalate as a raw material, in which the unsaturated polyester is used together with an acid component and a glycol component containing at least an α, β-unsaturated polybasic acid or an acid anhydride thereof. It was done. FRP for civil engineering construction The waterproofing material comprises the unsaturated polyester resin and the fiber reinforced material, the waterproofing sheet for civil engineering and building is formed by hardening the FRP waterproofing material into a sheet shape, and the civil engineering building structure is formed by hardening the FRP waterproofing material. The FRP layer or the waterproof sheet as at least a part thereof, or the top coat resin layer is formed of the unsaturated polyester resin. |