COMPOSITION FOR FIXING WOUND ITEMS

摘要

The invention provides a composition for fixing wound items, the composition comprising 5 to 97 wt% of at least oneα,β-unsaturated polyester resin and/orα,β-unsaturated polyester imide resin comprising components of at least oneα,β-ethylenically unsaturated mono-, di- and/or tricarboxylic acid, and/or its anhydride and/or ester, at least one polyol, at least one (meth)acrylic group containing component, possibly at least one mono-, di-, tri- and/or tetracarboxylic acid, which is notα,β-ethylenically unsaturated, and/or its anhydride and/or ester, and, in case of anα,β- unsaturated polyester imide resin, at least one imide having 5-membered cyclic imide moieties, in a ratio of the components, wherein at least one of the unsaturated mono-, di- and/or tricarboxylic acid and/or its anhydride and/or ester and/or the polyol and/or the mono-, di-, tri- and/or tetracarboxylic acid, which is notα,β-ethylenically unsaturated, and/or its anhydride and/or ester and/or, in case of theα,β-unsaturated polyester imide resin, the imide having 5-membered cyclic imide moieties comprises linear and/or branched aliphatic and/or cycloaliphatic moieties with more than eight (8) carbon atoms. The composition of the present invention provides low viscosities at high content of theα,β-unsaturated polyester resin and/orα,β-unsaturated polyester imide resin, low VOC resulting in low curing emissions and, further, provides excellent impregnation properties. After curing, these impregnation materials show a high toughness level combined with an excellent resistance to cracks.