DE1232168B - Decal for applying the decoration to heat-resistant substrates and the process for its production - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

Number:
File number:
Registration date:
Display day:

B 41m

German class: 15 k - 9/08

1232 168
J 24084 VI b / 15 k
17th July 1963
January 12, 1967

The invention relates to the application of the decoration to heat-resistant substrates, i. H. Documents that Can withstand temperatures of at least 400 ° C, such as glass, fused quartz or earthenware. In particular The invention relates to the application of a decoration or pattern made of gold by means of a transfer picture on such Documents.

A transfer for applying the decor to a heat-resistant base usually consists of a layer or backing of absorbent paper bearing a water-soluble gum directly either a cellulose carrier film bearing a pattern to be applied to the substrate, or the pattern itself is applied, which is then covered by a carrier film, which in this way both a coating and a support for the pattern after it has been detached from the paper backing and forms before firing the base provided with it. The pattern that is on the release paper can be applied in any suitable manner, for example by means of silk screen printing, can be made of a ceramic color or vitrifiable enamel or a metallic luster color composition, such as B. "Liquid gold", which is made from a solution of a sulfur resinate of gold in suitable Solutions, or a mixture of both materials.

While both types of decals described above are used for the application of vitrifiable enamel decorations It has been found that gold decorations can be used with decals where the pattern overlying the carrier film cannot be applied successfully, but that it is required is to use overlay type decals; d. H. those where the carrier film is over the pattern lies.

For decals with gold decorations, only cellulosic carrier films are mostly used on the basis to this day used by ethyl cellulose. Such a coating enables the production of a luminous gold decoration on glass or earthenware after firing, but is unfortunately not flexible enough to easy to be processed, so that there are often difficulties in a picture film on objects with a complicated shape, as it often occurs with earthenware, to apply.

On the other hand, overlay type decals bearing images in ceramic paint or in vitrifiable enamel usually have resinous or resinous, e.g. B. Flexibility, the decal for easy application on complicated shapes for decor application
heat-resistant materials and procedures for its
Manufacturing

Applicant:

Johnson, Matthey and Company Limited, London

Representative:

Dr. W. Müller-Bore and Dipl.-Ing. H. Gralfs,
Patent attorneys, Braunschweig, Am Bürgerpark 8

Named as inventor:
Kenneth William James Neale,
David Wellings Pointon, London

Claimed priority:

Great Britain July 17, 1962 (27,390)

are required and are therefore preferable to cellulosic materials. For example describes the German patent specification 898 909 a method for the production of decals for ceramic objects, which is characterized in that a flexible, rubberized base, z. B. made of ordinary water-permeable paper, printed with a motif and completely dried is, whereupon the entire printed surface of the flexible base in several superimposed Layers a plastic film, ζ. Β. from a synthetic varnish.

However, while decals with resin coatings are preferred for the application of ceramic colors.

lent are suitable, attempts have been made to such coatings to use for gold decor decals with little or no success, mainly because Reactions occur between the gold decorative film and the coating, which not only reduce the brilliance of the fired Gold film, but also affect its ability to adhere to the substrate. Also tend to the common solvents that are used to dissolve the coating are used to remove the gold film dissolve away and separate the resin material in the gold composition.

The invention aims to eliminate the above-mentioned disadvantages that arise when using

609 757/254

Claims (57)

3 4 Resin-based coatings occur and the on-offs occur. The pattern layer can be made exclusively from there would be a transfer for gold decorations or a combination of a gold preparation or a mixture of one drive for the application of gold decorations on heat such preparations with one or more ceramic solid bases, such coatings being used, mix colors or vitrifiable enamel can be to create. 5 according to the desired decor. According to a further feature of the invention, this object is achieved in that the image layer consists in a manner known per se of a method for applying a decoration to heat from a gold-containing composition or creates solid substrates, after which it contains such substances and that between the image layer a transfer according to the invention was applied and the coating layer a protective layer of an io and the substrate coated in this way is subsequently oxidizable or polymerizable, an alkyd, fired to remove the organic matter-phenol, urea or epoxy resin or to burn dry and leave the pattern adhering to the substrate or material containing semi-drying oil. The invention is arranged by which explains the drawing for the coating material. This shows a section through is urgent and with the gold of the image layer not a decal according to the invention,
reacted. In the drawing, 1 denotes a rubberized pa- This measure eliminates the disadvantages, the paper deposit, 2 a sample film or a sample so far with coatings based on resin for decal layer from a "liquid gold" preparation, 3 one were connected with gold decoration, completely eliminated, since the alkyd resin protective layer specified above the intermediate protective layer the penetration of 20 composition and 4 a coating carrier film, Solutions from the coating film in the gold decor are also prevented according to the above-given context as well as a reaction between the resin settlement. The layers 2, 3 and 4 are preferably selected after the coating and the gold in the image layer end of the image being burned into the substrate. applied to the silk screen printing process, whereby According to a further feature of the invention, a flat layer is used to apply the gold pattern layer is a method of making transfers using 200 threads per inch mesh screen of the coating carrier film type from the process. For the application of the coating carrier film steps: a coarser sieve with 90 threads each is preferred Application of a gold-containing pattern layer on inch used. the paper deposit, application of a protective 30 After the above an example of the invention layer is described from an oxidizable or polymerizable, it is understood that the invention Material that is compatible with the gold of the pattern layer is not limited by this example in any way reacts to this layer as well as application of a, but within the scope of the invention Abwand- Coating carrier film is accessible from a resin-based lung. For example, any other Material on this intermediate protective layer, which are used for the 35 "Liquid Gold" sample preparation, and Material of the coating carrier film impervious it can instead of alkyd resin linseed oil or tung oil or a is. The intermediate protective layer can be made of an alkyd or other polymerizable resin, resin, a phenolic resin, a urea resin, or the coating may be any of the above an epoxy resin or a composition deviating from a drying or given composition semi-drying oil, such as linseed oil or tung oil. 40 settling. They also need the decal The overlay carrier film cannot be silk screen printed from any of the constituent layers known resin-based coating solution exist, how to be applied, but can also by currently with ceramic paints or enamel - another suitable method, such as painting or Decals are used, such as B. from a spray applied. Film based on methyl methacrylate resin. 45 In carrying out the invention, the poly- merisable intermediate protective layer advantageously the claims:
have the following composition: Short oil alkyd resin (60% non- ^L transfer for gold decorations with a paper volatile in xylene) 25 ° / ⁵ ° underlay on which the picture layer is applied, cellulose nitrate .... '.'. '.'. '.'. '. '.'. '.'. '.'. 6.25% ™ ^{d ei "he} coating layer resin based d a- Plasticizer 6.25% ^d " ^{c h} .% ^{Ek e} A ⁿ " rejects the fact that the image High-boiling solvent .... 62.50 ° / f ?? ^{ht 1} ^ ^{in a} well-known manner from a gold containing composition exists or such A suitable overlay carrier film may contain the following and that between the image layer (2) and Composition have: the coating layer (4) a protective layer (3) 54.00% methyl methacrylate resin ™ oxidizable or polymerizable Aromatic hydrocarbon .. 36.00% A ¹ ^ "' f ^hen f' Haastdf- ° ^d f ^Ε Ρ ° ^Χ ^ ^ΓΖ or Phthalate plasticizer 2.40% of a drying or semi-drying oil containing Diluent 7.60% ^{6o border} material is arranged, which for the transfer zugsmatenal is impenetrable and with the The gold-containing pattern layer can not react from any gold of the picture layer, suitable commercially available "liquid gold" preparation. 2. Decal according to claim 1, characterized by stand. The composition of such materials distinguishes that the protective layer is linseed oil or tung oil is not part of the invention. The statement that it contains 65. generally made of sulfur resinants of gold in suitable 3. decal according to claim 1, characterized in that Neten solutions, usually with the addition of, indicates that the protective layer has the following composition Resinants of other metals, are likely to have compo- sition: 5 6 Alkyd resin 25.00% layer a "liquid gold" preparation or a Cellulose nitrate 6.25% mixture of a "liquid gold" preparation and Plasticizer 6.25% of one or more ceramic colors or high-boiling solvent ... contains 62.50% vitrifiable enamel. 5 7. Process for making a decal 4. Decal according to one of the preceding claims, claims, characterized in that the is characterized by the following process steps: on-coating-carrier film a film on methylmeth- bringing a gold-containing image layer to the acrylate base. Paper backing, application of a protective layer 5. Transfer according to claim 4, characterized in that it consists of an oxidizable or polymerizable one draws that the coating carrier film does not have the following material that does not match the gold of the image layer Composition has: reacts to this layer as well as applying one Methyl methacrylate resin 54.00% resin-based backing film aromatic hydrocarbon 36.00% ^ ^at t ^r f ⁸ ^ ₁ ^ ^Se intermediate protective layer, which for Phthalate plasticizer 2.40% ¹⁵ the material of the coating carrier film impervious Diluent 7.60% is urgent. 6. Decal according to one of the previously considered publications:
Claims, characterized in that the German patent no. 898 909. 609 757/254 1.67 ι Bundesdruckerei Berlin