GB1593214A - Storage device for colours and a process for the production of tinted enamels and emulsion paints - Google Patents

Description

PATENT SPECIFICATION

( 11) 1 593 214 /1 on ( 21) Application No 26072/78 ( 22) Filed 31 May 1978 ( 31) Convention Application No 2729037 ( 32) Filed 28 Jun 1977 Min ( 33) Fed Rep of Germany (DE) ( 44) Complete Specification Published 15 Jul 1981 ( 51) INT CL 3 C 09 D 7/14 ( 52) Index at Acceptance C 4 A 14 ( 54) A STORAGE DEVICE FOR COLOURS AND A PROCESS FOR THE PRODUCTION OF TINTED ENAMELS AND EMULSION PAINTS ( 71) We, BASF FARBEN + FASERN AKTIENGESELLSCHAFT, a German Company, of Am Neumarkt 30, 2000 Hamburg, Federal Republic of Germany, do hereby declare the invention for which we pray that a patent may be granted to us and the method by which it is to be performed to be particularly described in and by the fol-

lowing statement:-

This invention relates to storage devices for colours and to processes for the production of tinted enamels and emulsion paints.

The production of tinted enamels and emulsion paints represents, even today, a relatively difficult problem since there is an ever increasing transition to the use, for example, on interior and exterior walls, of coloured paints, the hue of which consists of a mixture of basic hues Thus only with very great difficulty can the same coloured paint be reproduced later on in the event of repairs, improvements or other subsequent work to the walls.

Up until now, special tinting pastes were produced for the tinting of enamels and emulsion paints for the most diverse binder system This was done by dispersing pigments, fillers and dyestuffs in water, solvents, synthetic resins and other film-forming binders with the aid of grinding units customary in the paint industry Such tinting pastes were weighed in, depending upon the desired hue, and supplied in metered feed by stirring the paste into the basic paint Another form of colouring emulsion paints consists in making dry pigments, enriched with wetting agents and dispersing agents, into a paste with water and stirring them into a aqueous basic emulsion paint These pastes or the dry pigments are added by weight or by volume.

Tinting pastes, however, dry up, incrust, form a skin, allow the pigment to settle as a sediment and can therefore be handled only with difficulty and can only, with great inaccuracy, be processed by the user who does not have adequate metered-feed equipment.

Working with colour pastes is complicated; with dry pigments it is practically impossible.

The selection of the respective hues also presents great difficulties since the layman cannot tell how the paint, when it has finally dried, will look inside rooms or on the walls of a house.

The present invention seeks to facilitate the hitherto unusually expensive and difficult mixing, as well as the expensive storage, of varous types of colour and to provide a process of working up such pigment pastes in such a manner that, without difficulty, they can in practice, be used by any layman without the known disadvantages A metered feed is provided for producing accurately predetermined hues without the expensive known stationary metered-feed equipment and these hues should be achievable even after many years.

According to one aspect of the present invention there is provided a storage device for colours comprising a rigid support sheet and hood-like containers fixed thereto, the containers being formed from a transparent material and having a surrounding edge extending in the plane of the support sheet, each container housing a film bag filled with tinting colour, the film bags being made of a material which is soluble in a basic paint.

It is to be borne in mind that the tinting colours are accommodated in soluble colour bags which, for example, should not come into contact with the ambient air The colour bags, therefore, represent the storage means and the metered-feed equipment.

According to a further aspect of the present invention there is provided a process for the production of tinted enamels and emulsion paints comprising the steps of dissolving one or more of a plurality of tinting colours, accommodated in film bags, in a basic paint in an amount dependent upon a desired hue of the enamel or emulsion paint to be pro"I) 1,593,214 duced and determined from a hue book or colour card displaying formulations of colours of enamels or emulsion paints that may be produced; and subsequently mixing the tinting colour or colours with the basic paint, the film bags dissolved in the basic paint, the film bags being stored in a storage device as recited above.

The present invention is such that when and wherever, i e in the workshop, in the home, on scaffolding or the like, the desired tinting colours can be metered and mixed, according to a predetermined formulation from a hue card, in a given amount of basic 1 5 paint effortlessly and in an extremely finely metered manner In dependence upon the number of film bags used, the film bag size and colour of the tinting colours therein and in accordance with a given formulation, an accurately predeterminable hue of a paint can now be achieved The mixing is as simple as conceivable in that the colour bag containing the tinting colour is added to the basic paint and is dissolved, without residue, therein An accurately predeterminable paint is therefore achievable without movement times, weighing times and waiting times Subsequent mixing may also be effected surely and rapidly even when a sizable interval of time lies between the first and second mixing.

The invention is illustrated, merely by way of example, in the accompanying drawings, in which:Figure 1 illustrates a storage device according to the present invention; Figure 2 is a section taken on the line 2 2 of Figure 1; Figure 3 illustrates three colour card blocks for use with a process according to the present invention; and Figure 4 illustrates a hue book for use with a process according to the present invention.

Referring first to Figures 1 and 2 there is shown a support sheet 1 on which is arranged, in the case of the illustrated embodiment, six containers 2 of equal size It is evident that the size of the containers and, hence, the number of containers arranged on a given support sheet 1 is governed by the amount of tinting colour to be accommodated in the respective colour bag.

Each container is of hood-like construction and has a surrounding edge 3 which is adhered or welded to the support sheet 1 so that an airtight enclosure within the container is formed A corner region 4 of the surrounding edge 3 of each container 2 is kept free from adhesive so that there is slight detachment of the containers from the support sheet whose surface may be protected with a special lacquer.

Inside the containers 2 are stored colour bags 5 which consist of a water-soluble material in each of which a tinting colour is accommodated The containers 2 consist of a transparent material sot hat it is immediately possible to see which colour is inside a given colour bag.

The support sheet 1 may be provided with 70 suspension devices 6 and with perforations 7, 8 whereby the separation of individual containers from one another is possible The suspension devices 6 enable the containers to be viewed and stored easily 75 The support sheet 1 may consist of any desired material, e g boardlike, while the containers 2 and colour bags 5 may be produced from plastics material.

In order to be able to produce the con 80 tainer 2 from as thin a plastics material as possible, and hence at favourable cost, the containers 2 are provided with profiles 9 which increase the stability of the shape selected 85 In Figure 3 there is shown three colour card blocks 10, 11 and 12 for use with a process according to the present invention which, in each instance, show hues which are substantially closely related to one another 90 In dependence upon the amount of basic paint, on the reverse side of individual colour cards 15 there is stated, in terms relative to the amount of tinting colour in the bags, the nature and the amount of the tinting colours 95 to be mixed to achieve the respective hue of paint The individual colour cards are held together by a connecting rivet 16 in such a manner that they are movable relative to one another 100 In Figure 4, a hue book, for use in a process according to the present invention, is shown in which all possible final paint colours which can be prepared from four tinting colours according to specified formulations In vari 105 ous panels 14, the final paints which can be mixed are shown true to the original and are provided with a number which corresponds to the numbers which are contained on the individual colour cards 15 of the colour card 110 blocks 10 to 12 or are contained in a formulation book It is now, by means of a large and extremely finely graudated survey which the hue book gives, possible to ascertain precisely the same colour on one of the colour 115 card blocks 10 to 12 and to establish which tinting colour and in what proportion must be added to the basic paint.

The formulations in the case of the use of the hue book according to Figure 4 are stated 120 in concrete figures and not in percentages, so that a conversion is no longer necessary The formulations are comprehensible through the identification of each colour with a colour square without explanatory text and can 125 therefore be used internationally Through the concertina folding it is possible both to perform a complete review of all colours and to review a restricted number of colours for example 180 hues The hues and their spac 130 1,593,214 ings from one another correspond for the first time in a hue catalogue, to the "Ostwald colour atlas" For the arrangement of each group of 45 hues, a triangle is selected to show the following colour courses:

from the most intense hue to the most greatly lightened hue from the most intense hue to the hue with the highest addition of black 1 ( from the lightest hue to the most intense hue and to the hue with the lightest addition of black.

These colour courses result from nine grey steps from white to darkest grey: to the grey steps there is added, in each instance, a hue from the colour atlas.

These features, taken together, in particular the practically stepless shading from hue to hue and the order principles of hue representation on the one hand and the formulation representation on the other hand, are not shown by any other hue card up to now.

It will be appreciated that by virtue of the embodiments of the present invention a surprisingly simple solution is achieved which, in the workshop, in the home or in practice on scaffolding, for example, enables any desired colour to be produced without metered-feed equipment, the desired colour always being repeatable accurately.

Moreover, the storage device of Figure 1 enables the storage of moisture-sensitive colour bags in the simplest conceivable manner and the selecting of the tinting colours is simplified and facilitated thereby.

Claims (9)

WHAT WE CLAIM IS:

1 A storage device for colours comprising a rigid support sheet and hood-like containers fixed thereto, the containers being formed from a transparent material and having a surrounding edge extending in the plane of the support sheet, each container housing a film bag filled with tinting colour, the film bags being made of a material which is soluble in a basic paint.

2 A storage device as claimed in claim 1 in which the containers are substantially rectangular in plan.

3 A storage device as claimed in claim 1 or 2 in which the surrounding edge of each container is adhered or welded to the support sheet.

4 A storage device as claimed in claim 1 or 2 in which the surrounding edge, except for a corner region, of each container is adhered or welded on the support sheet.

A storage device as claimed in any preceding claim in which the support sheet has perforations so that individual containers may be separated from one another.

6 A storage device as claimed in any preceding claim in which each container is provided with profiles to increase their stability.

7 A process for the production of tinted enamels and emulsion paints comprising the steps of dissolving one or more of a plurality of tinting colours, accommodated in film bags, in a basic paint in an amount dependent upon a desired hue of the enamel or emulsion 70 paint to be produced and determined from a hue book or colour card displaying formulations of colours of enamels or emulsion paints that may be produced; and subsequently mixing the tinting colour or colours 75 with the basic paint, the film bags being dissolved in the basic paint, the film bags being stored in a storage device as claimed in any preceding claim.

8 A storage device for colours substan 80 tially as herein described with reference to and shown in Figures 1 and 2 of the accompanying drawings.

9 A process as claimed in claim 7 and substantially as herein described with refer 85 ence to the accompanying drawings.

J MILLER & CO.

Chartered Patent Agents Agents for the Applicants, Lincoln House, 90 296-302 High Holborn, London WC 1 V 7 JH.

Printed for Her Majesty's Stationery Office, by Croydon Printing Company Limited, Croydon Surrey, 1981.

Published by The Patent Office, 25 Southampton Buildings, London WC 2 A l AY from which copies may be obtained.