| 摘要 |
The invention relates to two-component chemical fastening systems, the A-component containing an unsaturated polyester and a reactive diluent, and the B-component containing a peroxide and an extender, wherein the extender is either a monomeric component according to formula 1 <?in-line-formulae description="In-line Formulae" end="lead"?>(A-CH-CH-O)<SUB>n</SUB>-R (formula 1)<?in-line-formulae description="In-line Formulae" end="tail"?> or a resinous compound comprising, in a covalently built-in manner, a component having vinyl ether group(s), and the content of the peroxide in the B-component is from 0.5 to 99 wt. %. In the formula A, R and n are specified as hydrogen or C<SUB>1-3 </SUB>alkyl; C<SUB>1-20 </SUB>(hetero)-aliphatic with hydroxyl or amino groups, or poly(C<SUB>2 or 3</SUB>)glycol with 2-120 glycol units; and 1 to 4, respectively. The resinous compounds with built-in vinyl ether group(s) (0.5 to 50 wt. %, calculated as indicated) are obtained by reaction of a mixture of appropriate amounts of: a) a first compound (HVE) containing at least one hydroxyl group and at least one vinyl ether group, and b) a second compound (D/HIC), being an isocyanate; and c) a third compound (G/P/HP) from (1) C<SUB>2-6 </SUB>glycols, (2) C<SUB>5-20 </SUB>polyols having 2-5 hydroxyl groups and (3) hydroxyl terminated polyester compounds, not being alkyd resins, having 1-5 free hydroxyl groups and 2-50 monomeric units, or mixtures thereof. The invention also relates to methods for preparing (the B-component) of such two-component chemical fastening systems, as well as to use of the systems for chemical fastening.
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