| 摘要 |
1. A thickening paste for the production of a heathardenable moulding composition based on an unsaturated polyester resin, from which hardened mouldings can be obtained with only a small uptake of water ; a) the thickening paste consisting of a.1) 20 to 50 parts by weight of a thickening agent selected from oxides and hydroxides of calcium, magnesium, barium, aluminium and their mixtures, and a.2) 50 to 80 parts by weight of a paste-forming polyester, both based on 100 parts by weight of the thickening paste ; b.1) the paste-forming polyester being an unsaturated polyester which is obtained in a conventional manner from an alpha,beta-olefinically unsaturated dicarboxylic acid, a bifunctional alcohol and a molecular weight regulator ; and b.2) having an acid number of 10 to 40 and a hydroxyl number of 20 to 60 ; the thickening paste being characterised by the following feature : c) a monocarboxylic acid is used as molecular weight regulator. |
