发明授权
- 专利标题: Pressure-sensitive recording material
- 专利标题(中): 压敏记录材料
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申请号: US868211申请日: 1978-01-09
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公开(公告)号: US4147509A公开(公告)日: 1979-04-03
- 发明人: Hans Baumann , Andreas Oberlinner
- 申请人: Hans Baumann , Andreas Oberlinner
- 申请人地址: DE Rheinland-Pfalz
- 专利权人: BASF Aktiengesellschaft
- 当前专利权人: BASF Aktiengesellschaft
- 当前专利权人地址: DE Rheinland-Pfalz
- 优先权: DE27038 19770129
- 主分类号: B41M5/136
- IPC分类号: B41M5/136 ; B41M5/15 ; C07D493/10 ; C09B57/00 ; D06P5/00 ; B41L1/16
摘要:
A pressure-sensitive recording material which comprises a substrate bearing a dye-forming component and a binder. The dye-forming component is a spirodipyran of the formula ##STR1## where A is the radical of a fused benzene or naphthalene ring (which rings may or may not be substituted), R.sup.1 is alkyl of 1 to 16 carbon atoms, substituted or unsubstituted phenyl or phenalkyl of 7 to 10 carbon atoms, R.sup.2 is H or together with R.sup.1 is a trimethylene or tetramethylene bridge which is unsubstituted or substituted by from 1 to 3 alkyl, R.sup.3 is benzyl or .beta.-phenylethyl and R.sup.4 is benzyl, .beta.-phenylethyl or substituted or unsubstituted phenyl, or R.sup.3 is alkyl of 1 to 4 carbon atoms and R.sup.4 is substituted or unsubstituted phenyl or R.sup.3 is benzyl and R.sup.4 is .beta.-cyanoethyl. The recording materials give violet to bluish green colorations (copies) only on paper coated with an electron acceptor.
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