| 摘要 |
The subject of the invention is a modifier for expandable and expanded materials, polystyrene in particular, characterised by that it contains a fluorescent organic dye of the xanthene group in the form of 3,6- Bis(diethylamino)-9-[2-(ethoxycarbonyl)phenyl]xanthylium salt and also, optionally, ammonia, ethane-1,2-diol and toluene sulphonamide formaldehyde melamine copolymer. The subject of the invention are also modified expandable or expanded polystyrene materials containing - next to styrene polymer, organic blowing agents - the modifier.
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