Patent GB-1222714-A (GB)
Title: Photographic mordant compositions
Inventor: KALENDA NORMAN WAYNE
IPC: G03C1/835
Filed: 1968-09-05
Abstract: 1,222,714. Photographic mordant composition containing acrylic polymers. EASTMAN KODAK CO. 5 Sept., 1968 [8 Sept., 1967], No. 42326/68. Heading C3P. [Also in Division G2] A composition comprises a mordant, an acrylic interpolymer which comprises repeating units of an alkyl acrylate and from 5 to 30% by weight of repeating units having a watersolubilizing group attached thereto and a hydrophilic colloid binder material. The mordant employed is preferably a basic mordant and preferably one which will release a mordanted dye upon treatment with alkali. The mordants preferably have the general formula wherein m represents an integer of from 1 to 2, R 1  represents an optionally substituted alkyl group or an aryl group or with the exception of m = 2 an amino or substituted amino group or a linear ethenic polymeric structure, for example, an addition type polymer such as a polymer of a monoethylenically unsaturated polymerizable compound having periodically occurring groups of the structure attached to carbon atoms in the polymeric chain of a monoethylenically unsaturated polymer, the said chain may also include units of vinyl alcohol, unquaternized vinyl ester or vinyl alkyl ketone; R 2  represents a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, or a phenyl group; R 3  represents a hydrogen atom, an optionally substituted alkyl group, a hydroxyl, a halogen, or an aryl group, X represents an acid anion; and Z represents the non- metallic atoms required to complete a nucleus containing a 5- or 6-membered heterocyclic ring having nitrogen, oxygen, sulphur, and selenium as the hetero atoms. When coated as layers in photographic materials the compositions of the invention containing dyes act as antihalation layers. Many dyes are listed. The water-solubilizing groups of the acrylic interpolymer are typically sulphoester groups, sulphonic acid groups and carboxylic acid groups. The interpolymers of this invention preferably are compatible with gelatin and have a Tg (glass transition temperature) of less than 20 C. Acrylic interpolymers disclosed in the examples are copoly (butyl acrylate-sulphopropyl acrylate), copoly (ethyl acrylate-acrylic acid), copoly (butyl acrylate-acrylic acid), copoly (n-butyl acrylate-N-cyanoacetyl-N<SP>1</SP>-meth. acrylyl - hydrazine - acrylic acid - 4,4,9 - trimethyl - 8 - oxo - 7 - oxa - 4 - azonia - 9 - decene- 1 - sulphonate), copoly (n - butyl acrylate - 2- acetoacetoxyethyl acrylate - acrylic acid - 4,4,- 9 - trimethyl - 8 - oxo - 7 - oxa - 4 - azonia - 9- decene - 1 - sulphonate), copoly (ethyl acrylate - acrylic acid - 4,4,9 - trimethyl - 8 - oxo - 7- oxa - 4 - azonia - 9 - decene - 1 - sulphonate) and copoly (methyl acrylate - 3 - acryloxypropane- 1-sulphonic acid) sodium salt. The compositions of the present invention form a tenacious bond with most photographic supports, are resistant to cracking and provide good dimensional stability with respect to the support, will not wash off the support in processing solutions and are especially useful with polyester supported materials.