| 摘要 |
<p>384599 An unsaturated halogenated or non-halogenated polyester resin composition for open lay-up moulding and containing styrene as an agent for cross-linking during curing additionally contains 0.1 to 5 by weight, based on the total weight of the composition, of at least one C18-40.alpha. - olefinecompound which is theoretically capable of taking part in the cross-linking reaction. When the composition contains a non-halogenated polyester resin, then the .alpha.-olefine compound itself serves to restrict styrene evaporation from the composition. For halogenated polyester resin compositions the .alpha.-olefine, although not usually by itself providing such a marked restriction of styrene evaporation, does allow in corporation into the composition of a waxy compound in an amount sufficiently large to achieve the desired styrene evaporation restriction without deterioration of the adhesion properties of the composition during lay-up.</p> |
