Process for producing 3,5-di(.alpha.-methylbenzyl)salicylic acid derivative, and use of polyvalent-metal-modified product thereof as color developer
US5326739A · kind A · utility
4Cited by
5References
15Claims
0Family size
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Key dates
| Filing date | Oct 12, 1993 |
| Grant date | Jul 5, 1994 |
| Priority date | — |
| Expiry date | Oct 12, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/3335
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A color-developing sheet using, as a color developer, polyvalent-metal-modified products of salicylic acid compounds composed mainly of a 3,5-di(.alpha.-methylbenzyl)salicylic acid derivative obtained by reacting a salicylic acid ester with an .alpha.-methylbenzyl halide in the presence of an acid catalyst and hydrolyzing the reaction product. Said color-developing sheet has excellent color developability at low temperatures and gives a color of excellent water resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.