UA21399U - Agent for paint stripping - Google Patents

Abstract

An agent for paint stripping contains 1) methyl ether of fatty acids, surfactants, water, 2) methyl ether of fatty acids and inorganic acid in ratio of 3:1, organic solvent or glycol ether. It contains methyl ether of bur oil as methyl ether of fatty acids, ethoxylated linear secondary alcohols of C12-C14 fractions with ethoxylation grade of 7 as surfactants, white spirit as organic solvent, diethylene glycol monoethyl ether or mixture thereof in ratio of 1:1 as glycol ethers, and additionally it contains 20% solution of sodium tetraborate in glycerol.

Description

Description of the invention

The utility model refers to the composition of detergents and their use in printing production, 2 in particular for removing printing ink based on alkyd, phenol-formaldehyde and modified phenolic resins, rosin ethers, mineral oils, olives, and UV paints based on oligoether acrylates, oligoether urethane acrylates, oligoetherurethane maleinates, oligoepoxyurethane acrylates, etc., as well as hybrid paints, which combine the above-mentioned film-forming components, from the surface of rubber and polyetherurethane paint rollers, rubber fabric sheets of the offset deck, technological units and 70 parts of printing machines.

A known detergent consisting of a low-volatile solvent based on a combination of vegetable oils, aromatic hydrocarbons, esters of iso- or p-paraffins, or monobasic fatty acids, and as a solvent of polyglycol of the formula HO-K "15-0(-K"125- 0-К«225-О)-Н, where К«1» and К«2» are alkyl from Siv, n-1-70 (1). It well removes paint based on alkyd resins, phenol-formaldehyde and modified phenolic resins, ethers of 12 rosin, mineral oils, oils only in the presence of a large amount of the agent on the surface of rubber and polyurethane rollers of the inking apparatus of printing machines and rubber cloth panels of the offset deck, and this causes their significant swelling. The typical operating conditions of the printing equipment provide for the repeated application of a means for cleaning the surface of the rubber and polyurethane rollers of the inking machine and the rubber fabric panels of the offset deck when switching to another order, at the end of a shift, when paint, paper dust, etc. accumulate on the surfaces of these important components of the technological process of printing prints, as a result of which the surface prematurely loses its elastic properties and is activated faster, thereby leading to an increase in defects and destabilization of the printing process.

There is a cleaning composition for removing printing ink, which contains tall oil esters in the amount of 20-9Omas.bo in combination with organic solvents or a surfactant (surfactant) and water can be added if a water-soluble surfactant is used (21. It is good removes paint based on alkyd, phenol-formaldehyde and modified phenolic resins, rosin ethers, mineral oils, oils, but it is difficult to remove UV paint based on oligoether acrylates, oligoether urethane acrylates, oligoether urethane maleinates, oligoepoxy urethane acrylates, etc., which are typical components of UV paints. , after treating the surface of the rubber and polyurethane rollers of the inking apparatus of printing machines and the rubber fabric panels of the offset deck with such a mixture, its ink acceptance is disturbed. The paint is not Ge"! distributed in an even layer, which causes a significant number of defective prints, so it is necessary to wash the surface with water to restore ink acceptance. Adding water to of the mixture, as recommended by IL, causes significant delamination, which requires constant mixing of the mixture. "--

The closest technical solution, chosen as a prototype, is the composition 1) (3) for removing printing inks based on alkyd, phenol-formaldehyde and modified phenolic resins, rosin ethers, mineral oils, oils, which consists of the following components in this ratio , wt. 9o: methyl ether of fatty acids, namely methyl ether of soybean oil - 60-95;

Surfactants, namely ethoxylated alcohols of the C/-C.40 fraction with a degree of oxyethylation of 2-8 - 5-40; "

Surfactant, namely the condensation product of oxyethylated alcohols of the C42-C-8 fraction with ethylene and propylene oxides - C 70. 0-30; with water - 0-20;

From" and for removing UV paints based on oligoether acrylates, oligoether urethane acrylates, oligoether urethane maleinates, oligoepoxy urethane acrylates, etc., there is a composition 2) |Z), which consists of the following components in this ratio, wt. because: methyl ether of fatty acids, namely methyl ether of soybean oil, and an inorganic acid in the ratio of 31 to 5O-95; - organic solvent, namely aliphatic or aromatic hydrocarbons or glycol ethers - 5-50.

These products wash well only fresh paint. The hardened and dried paint layer is removed after repeated application of a significant amount of cleaning agents. In addition, the presence of aromatics

Te) 20 hydrocarbons causes the swelling of rubber fabric webs, especially their edges, which causes uneven application of paint in the print plane due to changes in the deformation characteristics of the webs. Also, after using these products, the color reception of the surface of the rollers and panels is disturbed, it must be washed with water to restore the color reception and ensure the reduction of defects and stabilization of the color transfer, which makes the use of the products non-technological. 29 The useful model is based on the task of changing the composition of the detergent 1) for removing paint based on alkyd, phenol-formaldehyde and modified phenolic resins, rosin ethers, mineral oils, oils, and agent 2) for removing UV-paints based on oligoether acrylates , oligoetherurethane acrylates, oligoetherurethane maleinates, oligoepoxyurethane acrylates, etc. and hybrid paints, to ensure complete removal of paint, stabilization of paint transfer, reduction of swelling of the rubber fabric sheets of the offset decal, 60 reduction of the number of defective prints after using the products.

The essence of the useful model is in the washing agent 1), which contains methyl ether of fatty acids, namely methyl ether of soybean oil; Surfactants, namely ethoxylated alcohols of the C.-C3ou fraction with a degree of oxyethylation of 2-8;

Surfactant, namely the condensation product of oxyethylated alcohols of fraction C42-C48 with ethylene and propylene oxides; water and is used to remove paint based on alkyd, phenol-formaldehyde and modified bo-phenolic resins, rosin ethers, mineral oils, oils from the surface of rubber and polyurethane paint rollers, rubber fabric sheets of offset decals, and agent 2), which contains methyl fatty acid ester, namely methyl ester of soybean oil, and inorganic acid in a ratio of 3:1; organic solvent, namely aliphatic or aromatic hydrocarbons or glycol ethers, and is used to remove

UV-paints based on oligoether acrylates, oligoether urethane acrylates, oligoether urethane-maleinates, oligoepoxy urethane acrylates, etc., and hybrid paints from the surface of rubber and polyether urethane paint rollers, rubber fabric panels of the offset deck, methyl ether of rapeseed oil was introduced instead of methyl ether of soybean oil, and ethoxylated fractional alcohols were introduced instead of surfactants С.-С4о with a degree of oxyethylation of 2-8 and the condensation product of oxyethylated alcohols of fraction С42-С-v with ethylene and propylene oxides introduced 7/0 ethoxylated linear secondary alcohols of fractions С42-С4и4 with a degree of oxyethylation of 7 and as an organic solvent - or white - spirit, or glycol ethers - monoethyl ether of dipropylene glycol, or their mixture in a ratio of 1:11 and additionally a 2090th solution of sodium tetraborate in glycerol in the following ratio of components, by weight: 1) methyl ether of fatty acids, namely rapeseed methyl ether oils - 30-65;

Surfactant ethoxylated linear secondary alcohol fractions C42-C44 with the degree of oxyethylation 7 - 15-30; water - 10-15; 2090th solution of sodium tetraborate in glycerol - 5-30; 2) methyl ether of fatty acids, namely methyl ether of rapeseed oil, and inorganic acid in a ratio of 3:1 - 40-70; organic solvent or glycol ethers, namely white spirit or dipropylene glycol monoethyl ether, or their mixture in a ratio of 1:1 - 15-30; 2096th solution of sodium tetraborate in glycerol - 15-30.

A comparative analysis of the claimed technical solution with the prototype allows us to conclude that the useful model has common features with the prototype, namely, it contains 1) methyl ester of fatty acids,

Surfactant, water and 2) methyl ether of fatty acids and inorganic acid in a ratio of 3/1, organic solvent or glycol ethers, and is used as a washing agent for removing printing inks based on alkyd, t phenol-formaldehyde and modified phenolic resins, rosin ethers, mineral oils, olives, etc

UV paints based on oligoether acrylates, oligoether urethane acrylates, oligoether urethane maleinates, oligoepoxy urethane acrylates, etc., as well as hybrid paints that combine in their composition the above-mentioned components of film formers, from the surface of rubber and polyether urethane paint rollers, rubber fabric sheets of offset decals, differ in that they have in its composition as a methyl ether of fatty acids Me - methyl ether of rapeseed oil, as a surfactant - ethoxylated linear secondary alcohols of fractions С42-С44 with a degree of oxyethylation of 7, as an organic solvent - white spirit, glycol ethers - monoethyl ether of dipropylene glycol , or their mixture in a ratio of 1:11, and additionally contains a 20956th solution of sodium tetraborate in -- glycerol in the following ratio of components, wt. ;

Surfactants are ethoxylated linear secondary alcohols of C.425-C44 fractions with a degree of oxyethylation of 7 - 15-30; water - 10-15; 2090th solution of sodium tetraborate in glycerol - 5-30; "2) methyl ether of fatty acids, namely methyl ether of rapeseed oil, and an inorganic acid in the proportion pl") with 3:1 - 40-70;

And an organic solvent or glycol ethers, namely white spirit or dipropylene glycol monoethyl ether, or their mixture in a ratio of 1:1 - 15-30; 2096th solution of sodium tetraborate in glycerol - 15-30.

Thus, the washing agent for removing printing ink, which is claimed, meets the criterion of the invention "novelty".

The proposed technical solution is illustrated by the following examples. - Example 1. Detergent 1) is prepared by sequential addition to methyl ether of rapeseed oil with 2) stirring in a laboratory stirrer at a speed of 80 rpm at a temperature of 20-25 C. Surfactants - ethoxylated linear 5r Secondary alcohols of fractions C.42-C44 with degree oxyethylation 7, 2095-th solution of sodium tetraborate in glycerol and water.

Ge) The ratio of components in the composition of the detergent according to example 1 is given in the table. 1.

Example 2. Detergent 1) is prepared according to example 1. The ratio of components is given in the table. 1.

Example 3. Detergent 1) is prepared according to example 1. The ratio of components is given in the table. 1.

Example 4 (prototype). Detergent 1) is prepared by sequentially adding to the methyl ether of soybean oil while stirring in a laboratory stirrer at a speed of 8 rpm at a temperature of 20-259С0 surfactants - with ethoxylated alcohols of the С/-С.о fraction with a degree of oxyethylation of 2-8 and water in such ratio of components, mass.9o, respectively: 70; 20; 10.

Example 5. Detergent 2) is prepared by sequentially adding rapeseed oil to methyl ether while stirring in a laboratory stirrer at a speed of 80 rpm at a temperature of 20-259C; inorganic acid, namely boric acid in a proportion of 31, an organic solvent - white spirit and a 2095% solution of sodium tetraborate in glycerin are added to the resulting mixture while stirring.

The ratio of components is given in table. 1.

Example 6. Detergent 2) is prepared according to example 5. Dipropylene glycol monoethyl ether 65 is added as a solvent. The ratio of components is given in table. 1.

Example 7. Detergent 2) is prepared according to example 5. As a solvent, a mixture of white spirit and dipropylene glycol monoethyl ether is added in a ratio of 1:1. The ratio of components is given in table. 1. ; 1 2 Z 5 Ge 7

Rapeseed oil rapeseed oil 11111100 65000101 pc oxyethylation 7 yuovia 01111161 yu1 8011

Mixture of methyl ether of market salt of boron purity in pomovka Z 12112117 1311106)

Ua 000015

Dipropylene glycol monoethyl ether with (Mixture of whitetopyrite and dipropylene glycol monoethyl ether in a ratio of 11) 1011011

Example 8 (prototype). Detergent 2) is prepared by sequentially adding an inorganic acid, namely boric acid in a ratio of 3:1, to the methyl ether of soybean oil while stirring in a laboratory stirrer at a speed of 8O0rpm/min at a temperature of 20-259С, glycol ethers are added to the resulting mixture while stirring - 20 monoethyl ether of dipropylene glycol in the following ratio of components, wt.9o, respectively: 50; 50.

The color transfer of the surface of the rubber fabric sheet of the offset deck (OGP), the quality of washing, and the number of defective prints preceding the good ones were evaluated by obtaining prints on chalked and non-chalked paper for offset printing with a weight of 1m2? 120g in the LIP-2 laboratory proboprinting device. For this, Ageiv blue printing ink (zgarpisv В 96003/2.5 AM Koshpa Suap Zeti Egewip and 29 Ageiv purple Sgarpisv AM Kotspa Madepia beti E in the amount of 0.34 g were weighed on a laboratory electronic (ste) balance AYU 200 (Ahiv, Poland) with with an accuracy of 0.001 g and transferred with a spatula to the rollers of the rolling system of the LI-2 protoprinting device. The paint was rolled out for 15 minutes at a temperature of (24-1) 2 C. The printing form was installed in the rolling system and paint was applied to the form along its length. OGP Aigdoi 9500 was fixed on the bar and were installed together with the form with paint in the proof printing device, strips of Ф3о paper measuring 48x255mm were attached to the second form and installed in the proof printing device, Ф) set pressure modes on the device of 30kg/cm and speed of 2m/s and received a print. with

OGP Aigaoi 9500 was washed with a cloth swab moistened with the investigated washing compositions, after printing the print alternately with purple and blue ink, and wiped dry with a dry cloth "with a swab." The forms were also washed with appropriate compositions until the polished surface was completely cleaned and shiny. high school

The quality of washing was assessed visually by the presence of a paint coating of the appropriate color on the surface of the OGP.

Appropriate compositions were used for washing the rollers of the laboratory rolling-inflating device.

The transfer of paint from the mold to the OGP, and from it to the paper, was determined by the paint transfer coefficient K « 20 (95), which was calculated based on the results of weighing on analytical electronic balances AYU-200 with an accuracy of -0.001g of the mold with paint and the mold with paper before and after contact in the pair "form-OGP" and "OGP-paper". We evaluated the stability of ink transfer in the presence of a constant value of Kp during the printing of 5-10 high-quality prints with alternating colors.

The quality of the prints was assessed visually by the number of defective prints preceding the good ones, 15 the uniformity and integrity of the printing plate, the presence of a shade when transitioning from blue to purple 7 paint.

The degree of swelling of rollers made of monotan with a hardness of 20 and 40 Shore units and rubber with a hardness of 40 Shore units and OGP Aigaoi 9500 was determined by the weight method by the ratio of the weight of the samples kept in these detergents for 24 hours to the weight of the samples before swelling. 50 Five parallel measurements were carried out for each indicator. se) The results of tests of detergents are given in table. 2. c Analysis of the data given in the table. 2, shows that the introduction to 1) and 2) of the composition as methyl ether of fatty acids - methyl ether of rapeseed oil, to composition 1) as a surfactant - ethoxylated linear secondary alcohols of fractions C42-C44 with a degree of oxyethylation of 7, to composition 2) as an organic solvent or glycol ethers - or white spirit, or dipropylene glycol monoethyl ether, or their mixtures in a ratio of 111, and in addition to the composition of 1) and 2) - 20956 solution of sodium tetraborate in glycerol, provides a low degree of swelling of rubber and polyurethane paint rollers and rubber fabric panels of the offset deck, ensures effective washing and the absence of a shade of the print when switching from paint of one color to another, stable paint transfer, reduction of the number of defective prints preceding good ones. in Sources of information: 1. German patent OE4441144, MIZH SI IU 1/66, SOJ 3/18, SOJ 39/20. Publ. 05/23/1996 2. US patent 55340493, IPC C090 9/00, C090 9/04, SOYU 7/50. Publ. 23.08.1994 3. US patent О0О55340495, IPC СО090 9/00. Publ. 23.08.1994

SA drinking zhyatta yayu bo Results of measurements of indicators by examples

Indicators Example | Example | Example Example 4 Example | Example | Example Example 8 (prototype) 1 2 Z (prototype) 5 b 7 pmovivalai 00001005 080002 00700000025 2528000

DY and conditional plots 859087 002000000095 00000090 sketch 11001011

Presence of shade Absent | Absent Absent Appears when Absent | Absent (Absent Appears with a sufficient layer of the print when transitioning from an insufficient paint of one color to a layer of another paint

Stability Normal Normal Normal Exceeds normal Normal | Normal Normal Exceeds color transfer: normal

Number of defective 4 5 4 14 10 26 prints after washing preceding good ones

Claims (1)

The formula of the invention Means for removing paint, which has in its composition 1) methyl ether of fatty acids, surface-active substances, water and 2) methyl ether of fatty acids and an inorganic acid in a ratio of 3:71, an organic solvent or glycol ethers, which differs in that , which has rapeseed oil methyl ether as a fatty acid methyl ester, ethoxylated linear secondary alcohols of C 42-C44 fractions with a degree of oxyethylation of 7 as surfactants, white spirit as an organic solvent, and monoethyl ether as glycol ethers dipropylene glycol or their mixture in a ratio of 1:1, and additionally contains a 20 9% solution of sodium tetraborate in glycerol in the following ratio of components, wt. 90: me) (22) 1) rapeseed oil methyl ether 30-65 ethoxylated linear secondary alcohols of C12-C14 fractions with a degree of oxyethylation 7 15-30 so water 10-15 "-- 20 90% solution of sodium tetraborate in glycerol 5-30 Zo 2) rapeseed oil methyl ether and inorganic acid in a ratio of 3:1 40-70 s white spirit or monoethyl ether of dipropylene glycol or their mixture in a ratio of 1:1 15-30 20 90% solution of sodium tetraborate in glycerol 15-30. Official bulletin "Industrial Property". Book 1 "Inventions, useful models, topographies of integrated circuits microcircuits", 2007, MZ, 15.03.2007. State Department of Intellectual Property of the Ministry of Education and Science of Ukraine. and? name) - (95) se) 3e) 60 b5