Heat-sensitive recording sheets

Details Heat-sensitive recording sheets Heat-sensitive recording sheets

1975-05-14

1977-04-26

Herbert, Jr., Thomas J.

Stock material or miscellaneous articles

Composite

427150, 427151, 427152, 428913, 428914, B41M 518

Patent

active

040202321

ABSTRACT:
This invention discloses a heat-sensitive recording sheet which comprises a support and, coated thereon, a heat-sensitive composition containing an organic base and at least one acylated lactone or sultone type acidic leuco dye capable of forming a color by reaction with said organic base at an elevated temperature. The invention further discloses as one embodiment a multicolor heat-sensitive recording sheet prepared by adding to the above-mentioned chromogenic system a chromogenic system comprising a normally solid phenolic substance and at least one basic chromogenic substance capable of forming a color by reaction with said phenolic substance at an elevated temperature. Preferable examples of the above-mentioned leuco dye are acrylated xanthene lactone type leuco dyes.

REFERENCES:
patent: 2675332 (1954-04-01), Green
patent: 3185583 (1965-05-01), Baumann et al.
patent: 3473945 (1969-10-01), Futaki
patent: 3632379 (1972-01-01), Wiese
patent: 3664858 (1972-05-01), Huffman

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