Liquid gold compositions
EP 1244753 B1
ÖZET (metnin alındığı doküman: WO2001040392A1)
The present invention relates to a liquid gold composition comprising a gold lustre and an effective amount of an acrylate polymer of the formula (I): -[-CH2-C(R)-]-n, C(O)-O-Y; where R = H or a C1-C4 alkyl group, Y = a C5-C40 hydrocarbyl group, which is monocyclic, bicyclic or tricyclic, which may be further carry ring substituents and n = an integer representing the number of repeat units in the polymer. The gold composition can be used to decorate substrate surfaces and the decoration applied upon firing forms an excellent, bright film of gold on the decorated substrate surface.

HAK TALEPLERI
A liquid gold composition comprising a gold lustre and 0.05 to 50% by weight of an acrylate polymer of the formula:


where
R = H or a C 1-C4 alkyl group,
Y = a C5 - C40 hydrocarbyl group, which is monocyclic, bicyclic or tricyclic, which may be further carry ring substituents, and
n = an integer representing the number of repeat units in the polymer.
A composition according to Claim 1 wherein the gold lustre is a hydrocarbyl mercaptide of gold and is of the formulae:
   Au-S-CH2R1, wherein R1 = alkyl Au-S-CH(R2)R3, wherein each of R 2 and R3 = the same or different alkyl or aryl group (secondary thiols)
Au-S-CR4R5 R6, wherein each of R4, R5 and R6 = the same or different alkyl or aryl group (tertiary thiols)
Au-S-R7 wherein R7 = aryl group or a substituted aryl group (aromatic thiols).
AuSCHRCO2R where R= H, alkyl or aryl and R'=H, alkyl or aryl

A composition according to Claim 2 wherein the hydrocarbyl group in the gold mercaptides are selected from alkyl, cycloalkyl, aryl and aralkyl groups, and the halo-, amino-, and carboxylic acid- substituted derivatives thereof.

A composition according to Claim 2 or 3 wherein the hydrocarbyl groups in the mercaptide is selected from methyl, ethyl, isopropyl, butyl, sec.-butyl, isobutyl, tert-butyl, heptyl, octyl, isooctyl, 2-ethyl hexyl, di-isobutylmethyl, nonyl, tert-nonyl, decyl, tert-decyl, undecyl, tert-undecyl, dodecyl, tert-dodecyl, tridecyl and octadecyl, cyclobutyl, cyclopentyl, cyclohexyl, dicyclohexylmethyl, phenyl, naphthyl, phenanthryl, benzyl, methylphenyl, 2-phenyl ethyl, 4-phenyl butyl, p-tert.-butylphenyl, o-methyl-p-tert.-butylphenyl, pinanyl, mixed methylphenyl, mixed dimethylphenyl, mixed dibenzylmethyl, p-chlorophenyl, pentachlorophenyl, o-carboxy-phenyl and o-aminophenyl groups.

A composition according to Claim 1 wherein the gold lustre is a gold sulpho-resinate.

A composition according to Claim 1 or 5 wherein the gold lustre is a gold sulpho-resinate obtained from a gold (III) salt and a sulphurised terpene, the terpene component of which may be naturally occuring

A composition according to any one of the preceding Claims wherein the cyclic hydrocarbyl group Y is a terpenyl group.

A composition according to any one of the preceding Claims wherein the terpenyl group is derivable from a terpene which is a natural, non-aromatic constituent of an essential oil, containing carbon, hydrogen and optionally oxygen, and/or a synthetic compound which is very closely related to the natural terpenes.

A composition according to Claim 7 wherein the terpenyl group is derived from a terpene is selected from monoterpenes (10 carbons - two isoprene units), sesquiterpenes (15 carbons), diterpenes (20 carbons), triterpenes (30 carbons) and tetraterpenes (40 carbons).

A composition according to Claim 9 wherein the terpenyl group is derived from a bicyclic monoterpene (10 carbons).

A composition according to Claim 10 wherein the terpenyl group is a bicyclic monoterpenyl group selected from bornyl, isobornyl, thujyl, fenchyl, pinocamphyl and isopinocamphyl groups.

A composition according to any one of the preceding Claims wherein the polymers of formula (I) have an average molecular weight in the range from 2,000 to 600,000.

A composition according to any one of the preceding Claims wherein the polymer of formula (I) is poly(isobornyl methacrylate).

A composition according to Claim 13 wherein the polymer has an average molecular weight in the range from 500,000-600,000.

A composition according to claim 13 wherein the polymer has an average molecular weight of approximately 100,000.

A composition according to any one of the preceding Claims wherein said composition contains in addition a solvent capable of forming a substantially homogeneous mixture with the gold lustre and the polymer so as to form a liquid or a smooth paste.

A composition according to Claim 16 wherein the solvent is selected from ketones, aliphatic hydrocarbons, aromatic hydrocarbons, alkyl acetates, glycol ethers, terpenes, natural oils and waxes.

A composition according to any one of the preceding Claims wherein said composition contains in addition a gold flux.

A composition according to Claim 18 wherein the gold flux is selected from salts or resinates of antimony, bismuth, boron, cadmium, cerium, chromium, cobalt, copper, iridium, lead, rhodium, silicon, silver, tin, titanium, vanadium and zirconium.

A composition according to Claim 18 or 19 wherein the amount of flux added to the compositions is in the range from about 0.01 to 10 % by weight of the total composition.

A method of decorating a substrate surface said method comprising applying a composition comprising a gold lustre and 0.05 to 50 % by weight of an acrylate polymer of the formula:


where
R = H or a C 1-C4 alkyl group,
Y = a C5 - C40 hydrocarbyl group, which is monocyclic, bicyclic or tricyclic, which may be further carry ring substituents, and
n = an integer representing the number of repeat units in the polymer in a solvent, and heat-treating the resultant decorated substrate to cure the decoration on the substrate surface.
A method according to Claim 21 wherein the composition is applied on the substrate surface by one or more methods selected from brush coating, spraying, stippling, stenciling, decalomania, direct and offset printing, indirect screen-printing, direct hot- or cold-printing and ink-jet printing techniques.

A method according to Claim 21 or 22 wherein the substrate on which the composition is applied is selected from the group consisting of glass, earthenware, bone china, porcelain, silicate materials, metals, quartz, carbon, mica, plastics, laminates, wood, paper, textiles and leather.

A method according to any one of the preceding Claims 21-23 wherein the composition applied to the substrate surface is as claimed in any one of the preceding Claims 2-20.