SU1728207A1 - Mastic for decoration of ceramic articles - Google Patents

Abstract

The invention relates to the production of unglazed ceramic floor tiles decorated with a serigraphy method. In order to increase the depth of the painted layer according to the pattern, reduce the time of mastic absorption by the unbaked ceramic base and reduce its viscosity, the mastic includes the following components, wt%: metal salt with a variable valence 42-50, carboxymethylcellulose 3-6, water 15-25 and carbamide 27-32. The indicators are as follows: the depth of the colored layer is 1-3 mm, the absorption time is 5-10 s, the viscosity of mastic is 12-16 dPa.s. 2 tabl,

Description

The invention relates to the production of building materials and can be used in the manufacture of unglazed ceramic floor tiles decorated with a serigraphy method.

Known mastic for decorating ceramic tiles, comprising the following components, wt%:

Pigment1-40

60-99 flux

Propinol20-35

Xylan2-5

The disadvantage of the mastic of this composition is the production of ceramic tiles with insufficiently deep relief according to the pattern (200-220 µm); moreover, it takes a long time to absorb the mastic into the ceramic base (20-30 s).

Closest to the invention is a mastic for decorating ceramic products, comprising the following components, wt%:

Pigment (metal salt

with variable valence) 60-90

Terpene substances, in particular, terpene alcohols10-30

Polymeric substances with polar functional groups, for example, carboxymethylcellulose 0.5-4.0

WaterEverything

The disadvantages of the known mastic are the insufficient depth of the painted layer according to the pattern, the long time of absorption into the ceramic base and the increased viscosity of the mastic.

The aim of the invention is to increase the depth of the layer to be painted according to the pattern, reducing the time of absorption by the unfired ceramic base and reducing the viscosity of the mastic.

Mastic for decorating ceramic products, including a variable-valence metal salt, carboxymethylcellulose and water, further comprises

00

WITH

42-50

3-6

15-25

27-32

urea in the following ratio, wt.%: Salt metal with variable valence

Carboxymethyl Cellulose Water

Urea

As salts of metals with variable valence, acid or chloride salts of cobalt, manganese, iron, copper, nickel, chromium, and mixtures thereof can be used.

  Mastic is produced by co-grinding all the components in a ball mill until it is completely through the 0056 sieve, rubbed through the 008 mesh and used for serial printing. Viscosity mastic 12-16 dPa with. Mastic is applied to raw materials (Sneglazed floor tiles) with a moisture content of 3-5% through stencils having 27-30 threads per centimeter of length. The absorption time of ceramic mastic is 5–10 s.

Decorated tiles are dried and fired on a flow-conveyor line with current firing modes for unglazed floor tiles. The maximum firing temperature is 1050-1080 ° C. Roasting time 60 min. Burnt tiles have a colored layer along the contour of the pattern to a depth of 1-3 mm.

In tab. 1 shows the composition of the mastic, in table. 2 - their properties.

Comparative tests of the proposed and known mastics allow us to conclude that the invention is aimed at obtaining unglazed decorated floor tiles, since such tiles are non-slip and have a high resistance to abrasion, which makes them more durable compared to glazed ones.

When using tiles, the pattern is more durable thanks to the colored layer to a depth of 3 mm.

Formulas of the invention Mastic for decorating ceramic products, including a variable valence metal salt, carboxymethylcellulose and water, characterized in that, in order to increase the depth of the painted layer according to the design, it reduces the time of absorption of the unbaked ceramic base and reduces the viscosity of the mastic additionally contains urea in the following ratio, wt.%:

Salt metal with variable valence42-50 Carboxymethylcellulose3-6

Water15-25

Urea 27-32

Table 1

Continued table. one

table 2

Claims (1)

Claim Mastic for decorating ceramic products, including a variable-valence metal salt, carboxymethyl cellulose and water, characterized in that, in order to increase the depth of the painted layer according to the pattern, reduce the absorption time of the unfired ceramic base and reduce the viscosity of the mastic, it additionally contains urea in the following the ratio of components, wt.%: Metal salt with valency 42-50 Carboxymethyl cellulose 3-6 Water 15-25 Urea 27-32 Table! Components The compositions of the mastics, wt.% 1 2 3 4 5 6 Metal salts of variable valency: manganese chloride MpS1 x ₂ x 6H ₂ O Nitrogen-acidic manganese Mn (NO _{3) 2} O 2'6N Nitrogen-acidic cobalt Co (NO _{3) 2} · 6Η ₂ Ο cobalt chloride SoS1 _2. 6H ₂ O Nitric acid copper Cu (NO ₃ ) 2.6H ₂ O Nitric acid chromium Cr (MO ₃ ) ₃ -9H ₂ O Nickel chloride NiCI ₂ x х 6Н ₂ О Chloric iron FeCI ₃ -6H ₂ O fifty 46 42 fifty 43 43 Urea 32 thirty 27 32 28 28 Carboxylmethyl cellulose 3 4 6 3 4 4 Water Technical terpineol Polyphenylmethylsiloxane fifteen 20 25 fifteen 25 25 Continuation of the table. 1 Components Famous 7 8 9 10 g wt.% Metal salts of variable valency: I manganese chloride MnCI x ₂ x 6H ₂ O Nitrogen-I sour manganese Mn (NO _{3) 2} '6H ₂ O Nitrogen-I acid cobalt * Co (NO ₃₎ 2 6H2O cobalt chloride C0CI2. -6Н2О Nitric acid copper Cu (NO ₃ ) ₂ -6H ₂ O Nitric acid chromium |! Cr (NO ₃ ) ₃ -9H ₂ O] Nickel chloride NiCI ₂ x | chbn ₂ about ί Chloric iron FeCI ₃ 6Н ₂ О Urea 46 31 45 29th fifty 27 42 28 fifty 75.8 : Carboxylmethyl cellulose 3 4 3 5 - - Water Technical terpineol Polyphenylmethylsiloxane 20 22 20 2b 2.0 10 4.0 3.0 15,2 6.0 table 2 Indicators Composition Famous 1 2 3 4 5 6 7 8 9 10 Depth ok-, painted layer, mm 3 2 1,0 3 3 3 2 2.5 1.0 1,5 0.5 Absorption time, s 5 7 10 5 8 8 6 7 6 10 12' Viscosity of mastics. dpa's 12 14 16 12 fifteen fifteen thirteen 14 thirteen 16 18