| abstract |
(57) [Summary] [Problem] The impregnating property of a foaming stock solution into a mat of long fibers of glass fibers is good, and the adhesion strength between a foamed resin and glass fibers after polymerization and the adhesion strength to a face material are high. Disclosed is a stock solution for rigid polyurethane foam, which has a small dimensional change of the foam after completion of the foaming reaction, and a method for producing a glass fiber reinforced hard polyurethane foam using the stock solution composition for hard polyurethane foam. When the total amount of a polyol compound is 100 parts by weight, an aromatic polyester polyol is used in an amount of 15 to 30 parts. 20 parts by weight of an aromatic amine-based polyether polyol 35 to 35 parts by weight, 25 to 45 parts by weight of a trifunctional polyether polyol having an aliphatic trifunctional alcohol as an initiator, 15 to 25 parts by weight of a polyfunctional polyether polyol having an initiator of sorbitol or sucrose, and The polyol component contains 2 to 10 parts by weight of a polyhydric alcohol having a molecular weight. |