Abstract:
A color developer composition for use in pressure-sensitive or thermally-responsive recording systems comprises a homogeneous mixture containing a phenolic material component which is itself a color developer and contains at least about 3.4 weight percent phenolic group, an aromatic carboxylate component corresponding to an aromatic carboxlic acid or mixture of acids which when in the free acidic state has an octanol/water partition coefficient (K ow ) of at least about 2.9, when expressed as log K ow , and divalent zinc. The homogeneous mixture may be prepared, for example, by mixing the three components with heating or in the presence of a common solvent.
Abstract:
A color developer composition for use in pressure-sensitive or thermally-responsive recording systems comprises a homogeneous mixture containing a phenolic material component which is itself a color developer and contains at least about 3.4 weight percent phenolic group, an aromatic carboxylate component corresponding to an aromatic carboxlic acid or mixture of acids which when in the free acidic state has an octanol/water partition coefficient (K ow ) of at least about 2.9, when expressed as log K ow , and divalent zinc. The homogeneous mixture may be prepared, for example, by mixing the three components with heating or in the presence of a common solvent.
Abstract:
Thermally responsive record material has an active coating on a substrate, especially paper. The active coating contains chromogenic material and, as co-reactant, bis (hydroxyphenyl)-phenyl alkane, especially bis (4-hydroxyphenyl)-phenyl butane. These co-reactants give improved background and intensity performance especially useful in facsimile papers.
Abstract:
In thermally responsive record material using a colour forming system of chromogenic and acidic colour developiong materials the inclusion of certain metal aralkyl or aralkenyl carboxylates gives improved oil resistance. In particular the metal carboxylates are of the formula (I): where R 3 is -CH = CH-; -CR 4 = CH-; -CR 5 = CH-; -(CH2)4-; -(CH 2 ) 3 - or -CH 2 -CH = CH-; where R4 is an alkyl group and R 5 is an aryl group; each R 1 is independently a hydrogen or halogen atom or an alkyl, alkoxy or nitro group; m is 1 to 5, preferably 1 to 3; M is a metal from Zn, Ca, Sn, Ni, Cr, AI, Co or Mg,preferably Zn or Ca; and n corresponds to the valency of M but is usually 2.
Abstract:
Thermally responsive record material has an active coating on a substrate, especially paper. The active coating contains chromogenic material and, as co-reactant, bis (hydroxyphenyl)-phenyl alkane, especially bis (4-hydroxyphenyl)-phenyl butane. These co-reactants give improved background and intensity performance especially useful in facsimile papers.
Abstract:
Record material carrying a colour developer composition for use in pressure-sensitive record sets comprises an addition product of phenol and a diolefinic alkylated or alkenylated cyclic hydrocarbon. The addition product has a minimum hydroxyl number, as determined for non-hydrogen bonded hydroxyl groups only by Fourier transform infra-red spectroscopy, in the range of 120 to 140.