| 摘要 |
PURPOSE:The titled composition having low viscosity, improved transparency and adhesiveness free from occurrence of face defects caused by curing strain, etc., obtain by dissolving an unsaturated polyester in styrene monomer or its derivative and a polymerizable unsaturated compound in a specific ratio. CONSTITUTION:(A) An unsaturated polyester having 500-8,000 molecular weight based on 1mol unsaturated group, obtained by condensing an acid component containing an unsaturated dibasic acid and/or its acid anhydride (maleic acid, fumaric acid, etc.), and, if necessary, another polybasic acid (e.g., phthalic acid, etc.) with an alcoholic component (e.g., ethylene glycol, etc.) is dissolved in (B) styrene monomer and/or its derivative and (C) one or more polymerizable unsaturated compounds selected from acrylonitirile, itaconic acid, and citraconic anhydride in a range of satisfy the equation [(a) is the number of moles of unsaturated group of the component A, (b) is number of moles of the component B, and (c) is the number of moles of the component], to give the aimed composition.
|
