| 摘要 |
The present invention is a novel class of compounds useful in useful in thermally-responsive record material of the type comprising a substrate having provided thereon in substantially contiguous relationship an electron donating dye precursor, and an acidic developer material. The novel compound of the invention is a compound of the formulawherein P is selected fromwherein R1, is selected from hydrogen, alkoxy, and aralkoxy;wherein R2 is aralkoxyalkoxy when P is phenyl, and R2 is selected from aralkoxyalkoxy or alkoxyalkoxy when P is naphthyl.Said alkyl moieties are each independently from one to eight carbons, said aryl moieties each independently being unsubstituted or substituted by alkyl (C1-C8), alkoxy (C1-C8) or halogen.The compounds of the invention enable manufacture of thermally responsive record material of the invention having the unexpected and remarkable properties of enhanced image intensity or density, and/or improved thermal response. The compounds of the invention also find use in diverse applications such as emolients and softening agents for creams, lots and cosmetics.
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