RU2318850C1 - Composition of pearly ink for decorating the wallpaper - Google Patents

Abstract

FIELD: light industry; composition of decorative coats for wallpaper; manufacture of pearly ink for intaglio printing on wallpaper.

SUBSTANCE: composition of proposed printing ink for wallpaper contains 16-16.5 mass-% of pearly pigment; 12-12.5 mass-% of ethyl alcohol; 46-46.4 mass-% of binder - acrylic latex of butyl acrylate copolymer (19-21%) and methacrylic acid (10-12%) and water; copolymer acrylic latex is produced by method of radiation emulsion polymerization of butyl acrylate, vinyl acetate and methacrylic acid under action of ionizing radiation at dose rate of 0.05-0.1 g/s to absorbed doses of 1.5-2 kgr.

EFFECT: avoidance of lamination of ink; easily washable ink; enhanced heat resistance of ink.

1 tbl, 2 ex

Description

The invention relates to the field of light industry, specifically to compositions of decorative coatings of paper for wallpaper, and can be used for the manufacture of pearlescent paint for printing wallpapers in a deep way.

The known composition of the decorative coating of paper for wallpaper [RU 2042008], containing pigment, polyvinyl alcohol and an organic additive. The disadvantage of this composition is that obtaining such a composition requires a multi-stage technology using elevated temperatures.

It is known [RU 2026915] a primer coating, a printed pattern and a finishing coating for moisture-resistant wallpapers that contain pigment, water and acrylate latex, consisting of methyl methacrylate, butyl acrylate, methacrylic acid and glycidyl methacrylate with a ratio of 32: 62: 5: 1, respectively. Acrylate latex is an aqueous polymer solution obtained by emulsion polymerization.

The known composition of pearlescent paint, including the pearlescent pigment "Iriodin", a binder - gloss attenuator varnish (BASF), ethyl alcohol and water (Formulation No. 2. Internal regulations for the production of wallpaper of Moscow Wallpaper Factory from 06.25.1999).

The known composition of pearlescent paint for printing wallpapers in a deep way, containing the pearlescent pigment "Iriodin", the binder "PV-1" (TM plant "Synthetic rubber" Yaroslavl), which is an aqueous polymer solution obtained by emulsion polymerization and neutralized with aqueous ammonia , ethyl alcohol, water (Recipe No. 1. Internal regulations for the production of wallpaper of Moscow Wallpaper Factory CJSC on 06/25/1999).

The disadvantage of these known compositions is the low sedimentation stability of the ink, insufficient heat resistance necessary for the production of foaming and low rinse off of printing plates, which leads to deterioration of the latter.

The technical task of this invention is to remedy the above-mentioned disadvantages: increasing the sedimentation and thermal stability of the ink, improving its washability from printing plates.

This object is achieved in that the pearlescent paint for finishing the wallpaper includes pearlescent pigment, ethyl alcohol, water, and the binder uses acrylate latex copolymer of butyl acrylate (19-21%), vinyl acetate (67-69%) and methacrylic acid (10-12 %), in the following ratio of components, wt.%

Pearlescent Pigment 16-16.5 Ethanol 12-12.5 Acrylate latex copolymer butyl acrylate, vinyl acetate, methacrylic acid 46-46,4 Water rest

As a pearlescent pigment, ground mica coated with metal oxides (pearlescent pigment) is used. For example, the pearl pigment "Iriodin" company Merck, Germany. It consists of mica and titanium dioxide. In this case, mica is the carrier of a transparent layer of titanium dioxide, which is responsible for the pearly shine. Pearlized pigments of the brands LB 100, EP 10, OX 115, KC 100 can also be used.

A binder, claimed in the form of acrylate latex of butyl acrylate (19-21%), vinyl acetate (67-69%) and methacrylic acid (10-12%), is obtained by the method of radiation emulsion polymerization of butyl acrylate, vinyl acetate and methacrylic acid under the influence of ionizing radiation at a dose rate 0.05-0.1 Gy / s to absorbed doses of 1.5-2 kGy.

The claimed radiation polymerization conditions of the copolymer are characterized in that the acrylate latex of the copolymer of butyl acrylate (19-21%), vinyl acetate (67-69%) and methacrylic acid (10-12%) is obtained using gamma radiation as the initiator to absorbed doses 1, 5-2 kGy.

The use of acrylate latex copolymer of butyl acrylate (19-21%), vinyl acetate (67-69%) and methacrylic acid (10-12%) as a binder allows to obtain pearlescent ink with high sedimentation resistance and washability from printing forms, while maintaining the pigment fixation, gloss , light and heat resistance of a printed print on paper. The ratio of butyl acrylate, vinyl acetate and methacrylic acid in the copolymer is due to the fact that at this ratio of monomers a copolymer is formed, which is effective both as a binder and as a thickener for paints. With a decrease in the content of butyl acrylate in the copolymer, the fixation of the pigment on paper and the abrasion resistance of the coating deteriorate. With an increase in the content of butyl acrylate of more than 21%, the price of pearlescent paint unreasonably increases. The viscosity of latex and the sedimentation stability of pearlescent paint depend on the methacrylic acid content in the copolymer.

The use of ionizing radiation is preferable because in this case the initiation rate is independent of temperature and constant in time. Therefore, the process can be carried out at low temperatures to a deep degree of conversion of monomers, which allows to reduce the formation of coagulum and to exclude an additional stage of distillation of monomers that have not entered into a reaction.

Example 1

The synthesis of acrylate latex copolymer of butyl acrylate, vinyl acetate and methacrylic acid in a ratio of 20:68:12 is carried out by the method of emulsion polymerization. An aqueous solution of sodium alkyl sulfonate emulsifier and a reaction mixture of butyl acrylate monomers, vinyl acetate and methacrylic acid in a ratio of 20:68:12 are loaded into the polymerization reactor. The copolymerization process is carried out at a temperature of 15-40 ° C under the influence of an initiator, preferably cobalt-60 gamma radiation, at a dose rate of 0.05-0.1 Gy / s to absorbed doses of 1.5-2 kGy.

Then the resulting copolymer is neutralized with an aqueous solution of ammonia to a pH of 8-9.

Then pearlescent pigment in an amount of 20 kg was mixed on a mechanical stirrer with water weighing 32 kg, ethyl alcohol weighing 15 kg and acrylate latex weighing 58 kg to a given ratio of components wt.%:

Pearlescent Pigment 16 Ethanol 12 Acrylate Latex 46,4 Water 25.6

The ink was processed both on the day of preparation and for 10-12 days on the Fischer and Cracke No. 3 deep printing machine. Gloss and fixing of mother of pearl are good (drawing "Watercolor"). Ink does not exfoliate and is well washed from printing forms. It maintains light resistance and increased heat resistance, which makes it possible to use paint when receiving foaming.

The test results are shown in the table. The quality of sedimentation stability was checked as a quantitative distribution of particles depending on the time of their sedimentation in a liquid.

Example 2

Synthesis of acrylate latex copolymer of butyl acrylate, vinyl acetate and methacrylic acid in a ratio of 21:69:10 according to example 1. Then the pearlescent pigment in an amount of 20.6 kg was mixed with a mechanical stirrer with water weighing 31.2 kg, ethyl alcohol weighing 15.6 kg and acrylate latex weighing 57.5 kg to a given ratio of components wt.%:

Pearlescent Pigment 16.5 Ethanol 12.5 Acrylate latex 46.0 Water 25.0

The ink was processed both on the day of preparation and for 10-12 days on the Fischer and Cracke No. 3 deep printing machine. Gloss and fixing of mother of pearl are good (drawing "Watercolor"). Ink does not exfoliate and is well washed from printing forms. Keeps light resistance and the increased heat resistance that gives the chance to apply paint when receiving foaming

Table Indicators / Options Recipe 1 (prototype), the ratio of components, wt.% Recipe 2, the ratio of components, wt.% The inventive composition, the ratio of components, wt.% (Example 1) The inventive composition, ratio of components, wt.% (Example 2) Pearlescent Pigment
Iriodin - 21.7
Ethyl alcohol - 8.7
PV 1 - 56.5.
Water - 13.1 Pearlescent Pigment
Iriodin - 18.2
Ethyl alcohol - 4.5
Gloss Varnish Gloss (Basf) - 59.1
Water - 18.2 Pearlescent Pigment - 16
Ethyl alcohol - 12
Acrylate latex - 46.4
Water - 25.6 Pearlescent Pigment - 16.5
Ethyl alcohol - 12.5
Acrylate latex - 46.0
Water - 25.0 Acrylate latex copolymer: Butyl acrylate - 20 Vinyl acetate - 68 Methacrylic acid - 12 Acrylate latex copolymer: Butyl acrylate - 21 Vinyl acetate - 69 Methacrylic acid - 10 Sedimentation stability Up to 50% Up to 50% Up to 20% Up to 20% Heat resistance, ° С 80-100 80-100 150 150 Resistance to abrasion, cycles 6 6 6 6

Claims (1)

The composition of pearlescent paint for wallpaper decoration, including pearlescent pigment, ethyl alcohol, water, and the binder is acrylate latex copolymer of butyl acrylate (19-21%), vinyl acetate (67-69%) and methacrylic acid (10-12%) in the following the ratio of components, wt.%. pearlescent pigment 16-16.5 ethanol 12-12.5 acrylate latex copolymer butyl acrylate, vinyl acetate, methacrylic acid 46-46,4 water rest the acrylate latex copolymer obtained by the method of radiation emulsion polymerization of butyl acrylate, vinyl acetate and methacrylic acid under the influence of ionizing radiation at a dose rate of 0.05-0.1 Gy / s to absorbed doses of 1.5-2 kGy.