A thermally color-developing reversibly thermochromic pigment which shows a uniform color density in the coloring temperature range and also shows an optional ΔH value within a range of from 3 to 40°C of the ΔH value (hysteresis temperature range) in a temperature-color density curve. Thermally color-developing reversibly thermochromic pigments of a three component system having a ΔH value of within a range of from 7 to 40°C in which at least essential three components including (a) an electron-donating chromic organic compound, (b) a specified compound selected from gallic acid esters and (c) a reaction medium selected from alcohols, esters, ketones and hydrocarbons, which reversibly generates color reactions of both of the compounds within a specified temperature range and has a melting point of less than 50°C, are microencapsulated, and of a four component system having a ΔH value of within a range of from 3 to 25°C in which a compound (d) selected from monomer compounds having a melting point of 50°C or more or polymer compounds having a softening point of 70°C or more is added to the three component system.
A series of alkyl gallates (3,4,5-trihydroxybenzoates) was synthesized and tested for their antibacterial activity against Salmonella choleraesuis. Nonyl (C-9) and octyl (C-8) gallates were noted to be the most effective against this food-borne bacterium, each with a minimum bactericidal concentration (MBC) of 12.5 mug/mL, followed by decyl (C-10) gallate, with a MBC of 25 mug/mL. Dodecyl (C-12) gallate exhibited activity against S. choleraesuis, with a MBC of 50 mug/mL. Propyl (C-3) gallate showed no activity against S. choleraesuis up to 3200 mug/mL. The length of the alkyl group is not a major contributor but plays a role in eliciting the activity to a large extent. The same series of alkyl gallates, regardless of alkyl chain length, all showed nearly the same potent scavenging activity on the 1,1-diphenyl-2-picrylhydrazyl radical, indicating that the length of the alkyl group is not associated with the activity.
LUBRICATING COMPOSITION CONTAINING AN AROMATIC COMPOUND
申请人:The Lubrizol Corporation
公开号:EP2513268A1
公开(公告)日:2012-10-24
USE OF AN AROMATIC COMPOUND AS ANTIWEAR AGENT IN LUBRICANTS
申请人:The Lubrizol Corporation
公开号:EP2513268B1
公开(公告)日:2019-02-20
COMPOSITIONS COMPRISING S-ADENOSYLMETHIONINE AND A GALLIC ACID ESTER