Invention Grant
- Patent Title: Recording material
- Patent Title (中): 录音材料
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Application No.: US438921Application Date: 1989-11-17
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Publication No.: US5024987APublication Date: 1991-06-18
- Inventor: Gunter Klug , Gert Jabs , Horst Berneth , Artur Botta
- Applicant: Gunter Klug , Gert Jabs , Horst Berneth , Artur Botta
- Applicant Address: DEX Leverkusen
- Assignee: Bayer Aktiengesellschaft
- Current Assignee: Bayer Aktiengesellschaft
- Current Assignee Address: DEX Leverkusen
- Priority: DEX3841184 19881207
- Main IPC: B41M5/132
- IPC: B41M5/132 ; B41M5/136 ; B41M5/155
Abstract:
Pressure-sensitive reactive recording material containinga) as the color-forming agent, a tetraindolylheptamethine ether or alcohol of the formulae I/1, I/2, I/3 or I/4 ##STR1## b) and, as the color developer, the salt of a polyvalent metal and an aromatic carboxylic acid having at least 10 carbon atoms, of the formula (II) ##STR2## wherein A, B, D and E denote ##STR3## and the other radicals have the meanings given in the description, produces light-stable copies which can also be read by machines (OCR).
Public/Granted literature
- US5569594A Transesterification with lipase immobilized on a polymer containing epoxy and tertiary amino groups Public/Granted day:1996-10-29
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