Method of alkyd varnish production and method of bulk component feed to reactor with explosive medium, such as used in alkyd varnish production

FIELD: chemistry.

SUBSTANCE: invention concerns paint-and-varnish industry, particularly alkyd varnish production using automated control system of technological process, as well as feeding of bulk components to reactor with explosive medium. Method of alkyd varnish production involves alcoholytic re-etherification of vegetable oil by pentaerythritol with heating in inert gas flow in the presence of catalyst, followed by polyetherification of re-etherification products by phthalic anhydride with heating, water distillation with azeotropic solvent, reaction product - alkyd resin - cooling to 160-180°C, varnish preparation by mixing obtained resin with organic solvent. Re-etherification and polyetherification process is performed in reactor featuring electric induction heating system and connected to technological pipelines with stop valves. Reactor has at least one pipe socket with heat-resistant gate installed in it, and at least two water heat exchangers in the form of worm pipes, mixer, nozzle column, vertical cooler, condenser and separation vessel. Alkyd resin dissolution is performed in mixer with stop valves, mixer, jacket and reverse heat exchanger for condensation and recycling of evaporating solvents in the mixer; vegetable oil dosing and loading to reactor is performed by automated control system, where stop valves of oil feed line are opened and closed by remote controls automatically or steered from control console; dosing and loading of bulk component, such as pentaerythritol and phthalic anhydride is performed and controlled over automated control system for bulk component dosage and loading, including depacker, tanker on tension weighing device, pneumatic lift, at least one ripper, snail feeder and mentioned heat-resistant gate in pipe socket of reactor; dosing and loading of azeotropic solvent and water to worm pipes of reactor, as well as recycled water feed and control and solvent feed to mixer are performed with remote automatic control of stop valves. In addition invention claims method of bulk component feed to reactor used in production of alkyd varnish.

EFFECT: reduced labour cost, improved fire protection and environmental safety.

22 cl, 1 tbl, 2 dwg, 2 ex

 

The invention relates to coatings industry, namely the production of alkyd varnishes using the automated control system of technological process, but also applies to supply bulk components in the reactor with a potentially explosive atmosphere and can be used to obtain, for example, different paints and varnishes based on it and coatings for various purposes and, in particular, used for painting metal, wooden and other surfaces used in the atmospheric conditions and indoors.

Widely known paints based on alkyd resins, modified vegetable oils. Coatings based on these resins have good physical and mechanical characteristics, but insufficient curing rate.

Known technologies for glyptal and pentaftalevyh resins are based on the stage of the transesterification of vegetable oils with glycerol or pentaerythritol, and the stage of polyesterification phthalic anhydride by heating the resin GF-046, PF-053-THE 6-10-612-76. Temperature interesterification is, as a rule, 240-260°and the exposure time up to 3 hours. With the aim of reducing the temperature of the stage interesterification of alkyd resins using catalysts soda ash, lead oxide (litharge), and others. However, to reduce the temperature and the juice is atiti time could slightly.

High temperature synthesis, the shutter speed used catalysts cause the appearance of dark lesions that are not compatible with the resin, which leads to the production of varnishes on the basis of these resins dark colors - more than 60 mg J2/100 cm3by iodometric scale.

A method of obtaining alkyd pentaftalevyh resin PF-060. According to this method, the stage of alcoholysis (transesterification) is carried out at 255±5°and the shutter speed of 2.5-3.0 h in the presence of a catalyst - soda ash (Handbook edited MLA Raw materials and intermediates for paints and varnishes". M, Chemistry, 1978, s-105, 116-117).

Get the varnish on the basis of this resin PF-060 has a fairly dark color 60 mg J2/100 cm3the lacquer film has a long time to complete drying at 20±2°With, namely 24 hours

A method of obtaining alkyd resins by reacting linseed oil, glycerol and/or pentaerythritol in the presence of a catalyst of the main character when 220-240°With subsequent interaction of the obtained product with phthalic anhydride and modifier at 250°C. as a modifier use 7-8% by weight of the reaction mixture of pomegranate oil. Lacquer coatings obtained on the basis of this alkyd resin, drying up of degree 3 for 1 h at 80°and have a hardness of 0.35 cu (SU 806696, 1980). Defects in the rigid of this method are the high temperature stages of alcoholysis (transesterification and polycondensation, as well as high temperature drying of lacquer coatings to complete their drying.

A method of obtaining alkyd resins by alcoholysis of waste PET waste for food packaging based on the PET with the contents up to 10% admixture of polyethylene and polypropylene and vegetable oils pentaerythritol in the presence of a catalyst, followed by polycondensation with phthalic anhydride. As catalyst, use cadmium or Nickel salts of saturated or unsaturated aliphatic monocarboxylic acids with a chain length6-C18or cadmium, Nickel or zinc salts acyclicity acid chain length acyl substituent C6-C18in an amount of 0.1 to 0.5% by weight of components. The alcoholysis is carried out, downloading at the same time to warm vegetable oil with catalyst pentaerythritol and PET waste. The known method also involves the use of high temperature on the stage of alcoholism (up to 250° (C)in addition, technologically complex and requires sophisticated equipment (EN 2209818, 10.08.2003).

From RU 2200741, 20.03.2003 known another method of obtaining modified alkyd resins based on glyptal and pentaftalevyh oligomers by the reaction of transesterification (alcoholysis) of vegetable oils with glycerol or pentaerythritol in the presence of a catalyst, then holding R is the stock polyesterification phthalic anhydride when heated in the presence as catalyst of the interesterification reaction of 2-ethylhexanate lead, at the stage of polycondensation glyptal resin impose additional phenolic resin-based para-tert-butylphenol and formaldehyde in the amount of 3-4 wt.%, and at the stage of polycondensation pentaftalevyh resin further added a mixture of benzoic acid and para-tert-butylbenzoic acids in the ratio 1:1.5-2.

On the basis of alkyd resins obtained data in a known manner, get the paint materials suitable for internal and external works on a variety of surfaces.

According to the known method are modified glyptal and pentaftalevyh alkyd resin with an acid number of 10-15 mg KOH/g, with color by iodometric scale 15 mg J2/100 cm3; drying at 20±2°C for 4-5 hours.

From RU 2249017, 27.03.2005, a method of obtaining alkyd resins and varnish based on it. Alkyd resin obtained by alcoholysis of vegetable oils and possibly rosin polyhydric alcohol (glycerol or pentaerythritol) in the presence of a catalyst, which is used as a mixture of lead and cadmium salts of saturated or unsaturated aliphatic monocarboxylic acid with a chain length of C6-C18in the form of a solution in white spirit in the number 0,009-a 0.02% by weight of components when heated. Next, carry out the polycondensation with the anhydride of dicarboxylic acids and modify what ATOR - phenolic resin based on the alkylphenol and formaldehyde in the ratio of from 1:1 to 1:2, or an aromatic monobasic carboxylic acid in a mixture of it with substituted aromatic monobasic carboxylic acid, taken in certain amounts. On the basis of such modified alkyd resins are the different coating materials containing, if necessary, various fillers, pigments, drying agent, an organic solvent and optionally a thickener, as well as different target additives (flame retardants, corrosion inhibitors, and others). Get resin light, with a high content of non-volatiles, low acid number, quick drying, provide paint materials with improved physical and mechanical properties (hardness, elasticity), as well as a good protective properties. Synthesis of alkyd resins carried out periodically azeotropic method in an inert gas, for example nitrogen, in the reactor with induction heating, internal cooling coil for cooling water and frame agitator. Charged to the reactor vegetable oil, part of glycerol or pentaerythritol. Include a stirrer and heated to a temperature of 150-160°add the catalyst. The interesterification reaction is carried out at a temperature of 180-230°C.

Sampling of the reaction mass implementation is collected every 15 minutes. The process is considered complete when reaching the solubility of the samples pereeterifikacii in ethyl alcohol in a ratio of not less than 1:2-5 at a temperature of 20±2°C. When the temperature of 180-190°introducing a second portion of glycerol or pentaerythritol, phthalic anhydride, modifier, and xylene for azeotropic distillation of water. After loading the temperature slowly raised to 220-230°With, every hour, then every 30 minutes taking samples of the resin to determine the acid number and viscosity.

The resin is rapidly cooled down to 170-180°and poured into the mixer, which was previously loaded with white spirit.

From monograph Millisec, Biesiadecki "Paints", 1982, M, Chemistry, pp.28-30, known periodic method for the production of alkyd varnishes, according to which the reactor (capacity 10 m3) load the liquid raw material (vegetable oil, glycerine), flowing by gravity from the dosing vessel, the solid components - phthalic anhydride (less - maleic) and rosin, coming in the form of melt through the dosing vessel by gravity, pentaerythritol from the hopper pneumatic transport, solvents (white spirit, xylene, solvent and other)coming into the reactor by gravity after carrying out the stages of alcoholism and polyesterification (with the exception of xylene, are added for the formation of azeotropic mixtures). Escaping the reaction is ionic gases and vapors enter the condenser, and then in liquid form in the separation vessel, where distilled water xylene is returned to the reactor, and the water and gas emissions through the interceptor removed for incineration. From the reactor lacquer base enters the mixer (capacity 25 m3)equipped with a condenser for mixing with solvents.

The resulting lacquer put on type, define its properties. To get it use the reactor, for example, magneto electric heating and economopoulou stirrer and blocked with reactor mixer with a propeller stirrer or frame agitator.

Used in the known method, the installation comprising a reactor, a mixer, and other auxiliary equipment (tanks, pumps, condensers, separation vessels, receivers) is widely used to obtain any of alkyd resins and varnishes based on them.

The disadvantage of these methods, including those taken as closest in patent RU 2249017, is the inability to obtain alkyd resins or alkyd varnish with stable performance, low sanitary and environmental conditions of its production, the use of manual labor during high stages of the process.

The technical objective of the claimed invention is to provide and improved stability characteristics itself is about process (conditions of those or other stages of the process), and get the finished product at different stages (resin and varnish), and as a result, simplification of the process, improving its fire and environmental safety.

The goal of the project is achieved by the claimed group of inventions, which includes directly method for the production of alkyd varnish, and the presentation of the bulk components in the reactor with a potentially explosive atmosphere, for example, upon receipt of alkyd varnish.

The task in terms of method of manufacture of alkyd varnish is solved due to the fact that the method according to the invention includes the transesterification - alcoholysis of vegetable oil pentaerythritol when heated in a current of inert gas in the presence of a catalyst, subsequent polyesterification products of interesterification of phthalic anhydride when heated, the water distillation azeotropic solvent, cooling the reaction product of an alkyd resin - to 160-180°With, the preparation of a varnish obtained by mixing the resin with an organic solvent, the process of interesterification and polyesterification carried out in a equipped with a system of magneto electric heating reactor provided with technological pipelines, equipped with shutoff valves and at least the reactor is equipped with one socket with a pre-installed heat-resistant valve, and also has no less than two water heat exchangers in the form of coils, stirrer, Packed Colo is Noah, vertical refrigerator, condenser and separator vessel, with the dissolution of alkyd resins is carried out in a mixer fitted with shutoff valves, a stirrer, a jacket and a reflux heat exchanger to condense and return to the mixer evaporating solvents, and dosage and loading of vegetable oil in the reactor is carried out using an automatic control system in which the closing-opening shut-off valves on the load line of the oil in the reactor is carried out remotely, automatically and control the process from the control panel, dosage and loading loose components, such as pentaerythritol and phthalic anhydride in the reactor is carried out and controlled by an automated control system and dosage download loose components, including retrival, the bunker on tantoush, pneumodynamic at least one Ripper, screw the Complainant and the above-mentioned heat-resistant valve on the nozzle reactor; dosage and download azeotropic solvent, water in the coils of the reactor, and the supply and regulation of recycled water, the flow of solvent in the mixer is implemented with remote automatic control valves.

When this process visualization can be done by displaying the position of the lock the second valve, other sites used for the equipment and process parameters not less than one monitor and the mnemonic.

As vegetable oils can be used sunflower oil.

As vegetable oils can be used soybean oil.

As vegetable oils can be used saffron oil.

As vegetable oils can use fatty acids of tall oil.

As vegetable oils can use fatty acids of vegetable oil.

As vegetable oils can be used distillirovannoi tall oil.

As the catalyst can use soda ash or desiccant, in particular lead desiccant, such as octoate lead.

At the stage of polyesterification additionally can enter maleic anhydride.

At the stage of interesterification of alcoholysis may additionally enter rosin.

After loading into the reactor vegetable oil content of the reactor can be heated to a temperature interesterification not less than 240°and maintain to obtain solubility of the sample in ethanol in the range of ratios from 1:2) to (1:10), and the process of heating and interesterification of oils is carried out in a current of inert gas, preferably nitrogen.

The reactor may be equipped with adjustable included is a vacuum system and a recovery system carry out from it phthalic anhydride and acrolein, the vegetable oil load pre-heated in the reactor, which in turn also preheated to a temperature of not less than 50°With, then download the pentaerythritol and download phthalic anhydride is produced at the end stage of transesterification and cooling to a temperature not less than 200°and loading of pentaerythritol and phthalic anhydride is preceded by connecting the reactor to the vacuum system of the current production of varnish and trapping carried away from the reactor phthalic anhydride and acrolein.

The process of polyesterification can implement to achieve the required performance viscosity and acid number alkyd resin.

The task in terms of method of delivery of bulk components in the reactor with a potentially explosive atmosphere, for example, in the production of alkyd varnishes solved due to the fact that the inventive method according to the invention the reactor is communicated with the technological pipelines, equipped with shutoff valves, and provided with at least one fitting with a pre-installed heat-resistant valve, vacuum system, equipped with at least one vacuum pump, and a dosing system and loading of bulk components, prior to the filing of loose components in the reactor include a vacuum system explosive environment of the reactor and DOS is igenii the required degree of vacuum open heat-resistant damper, and after the introduction into the reactor of the required number of these components close said valve, sealing the reactor.

Dosing and loading of bulk components may include retrival, the bunker on tantoush, pneumodynamic, Ripper, screw the Complainant and the above-mentioned heat-resistant valve on the nozzle reactor, the pre-loading of bulk components operate in separate silos, equipped with load cells to regulate the metered load and unload components, the subsequent filing of these components carry pneumomechanical in the Ripper, then submit them to the reactor, including a screw feed and vacuum system include before screw supply bulk components.

As loose components in the production of alkyd paints can be used, at least, necessary for the production process alkyd varnishes components selected from the group comprising pentaerythritol, phthalic anhydride, maleic anhydride.

Before applying loose components in the reactor can create a vacuum depth of not less than 0.15 MPa, preferably 0.2 ATM.

The vacuum can be created through the vacuum pump supplied with inlet and outlet nozzles, the latter communicated with the external atmosphere.

Feed yuchih components in the explosive environment of the reactor can perform consistently with screw applicants.

Regulation valves when loading loose components in the reactor can be done remotely, automatically displaying operations on the monitor or the mnemonic.

The on-off system degassing explosive environment of the reactor can be done remotely, automatically displaying operations on the monitor or the mnemonic while the system is turned off vacuum explosive atmospheres reactor produced preferably after heat-resistant closure flap.

Technical result achieved the claimed invention is to increase efficiency, fire and environmental safety while reducing the labor intensity and energy intensity of production processes alkyd varnish due to the automatic operations of weighing, dosing and loading of the reactor, mixer bulk and liquid components, and perform other operations, such as azeotropic separation of water at all stages of preparation of the resin and the final product - alkyd varnish, with a significant increase of ecological safety is achieved at the expense made in the invention the selection of technological equipment, but also due to the developed invention in a closed system load bulk components in the explosive environment of the reactor at acetaminophenodeine pneumatic and mechanical conveying of bulk components and turn on the system degassing explosive environment of the reactor for a period of direct injection into the reactor bulk components. Reducing the complexity and the technological ease of management processes is achieved through the installation of bins and mixer on tantoush and excretion of operational data on the parameters of the technological process on the remote display monitor and control processes of the preparation of alkyd varnish.

Technical solutions are illustrated by the drawings, which represent a special case of the method of production of alkyd varnishes and method of delivery of bulk components in the reactor with a potentially explosive atmosphere, not covering and moreover does not restrict the entire amount of the claims of this decision, where

1 schematically shows an installation used for implementing the method according to the invention;

figure 2 - reactor system magneto electric heating.

Method for the production of alkyd varnish includes the transesterification - alcoholysis of vegetable oil pentaerythritol when heated in a current of inert gas in the presence of a catalyst, subsequent polyesterification products of interesterification of phthalic anhydride when heated, the water distillation azeotropic solvent, cooling the reaction product of an alkyd resin - to 160-180°With, the preparation of a varnish obtained by mixing the resin with an organic solvent.

The process of interesterification and polyesterification carried out in a system equipped with the my magneto electric heating reactor 1, communicated with technological pipelines 2, provided with a shut-off valve 3 and, at least, the reactor 1 is equipped with one fitting with a pre-installed heat-resistant valve 4 and is also provided with at least two water heat exchangers in the form of coils 5, a mixer 6, the Packed column 7, vertical refrigerator 8, capacitor 9 and the separation vessel 10.

The dissolution of the alkyd resins is carried out in a mixer 11, provided with a stop valve, a stirrer, a jacket and a reflux heat exchanger 12 to condense and return to the mixer 11 evaporating solvents.

Dosage and loading of vegetable oil in the reactor 1 is carried out using an automatic control system in which the closing-opening valves 3 line load of oil in the reactor 1 is carried out remotely, automatically and control the process from the control panel.

Dosage and loading loose components, such as pentaerythritol and phthalic anhydride in the reactor 1 is carried out and controlled by an automated control system dosing and loading of bulk components, including retrival 13, the hopper 14 on tantoush, pneumodynamic 15, at least one Ripper 16, screw the Complainant 17 and the above-mentioned heat-resistant flap 4 on the nozzle reactor 1.

Dosage and zag is the DCU azeotropic solvent, water in the coils 5 of the reactor 1, and the supply and regulation of recycled water, the flow of solvent in the mixer 11 is performed with remote automatic control valves 3.

Process visualization is carried out by displaying the position of the stop valve 3, the other nodes of the equipment used and process parameters at least one monitor and the mnemonic.

As vegetable oils used sunflower, soybean, saffron oil, and fatty acids of tall oil, fatty acids of vegetable oil and distillirovannoi tall oil.

As catalyst, use soda ash or desiccant, in particular lead desiccant, such as octoate lead.

At the stage of polyesterification additionally can enter maleic anhydride.

At the stage of interesterification of alcoholysis may additionally enter rosin, which is pre-crushed and loaded into the form of a solution in oil.

As solvents used xylene, solvent, Whyte spirit or their mixtures in various combinations.

As the inert gas used is preferably nitrogen, produced by the gas separation membrane installation 18.

After loading into the reactor vegetable oil content of the reactor is heated to the temperature interesterification not less than 240° C and maintained until the solubility of the sample in ethanol in the range of ratios from 1:2) to (1:10), and the process of heating and interesterification of oils is carried out in a current of inert gas, preferably nitrogen.

The reactor 1 is equipped with adjustable include a vacuum system and a recovery system carry out from it phthalic anhydride and acrolein, while vegetable oil load pre-heated in the reactor, which in turn also preheated to a temperature of not less than 50°With, then download the pentaerythritol and download phthalic anhydride is produced at the end stage of transesterification and cooling to a temperature not less than 200°C. Loading of pentaerythritol and phthalic anhydride is preceded by connecting the reactor 1 to the vacuum system of the current production of varnish and trapping carried away from the reactor 1 phthalic anhydride and acrolein.

The process of polyesterification carried out to achieve the required performance viscosity and acid number alkyd resin.

In the method of supplying bulk components in the reactor with a potentially explosive atmosphere, for example, in the production of alkyd varnishes reactor 1 is communicated with the technological pipelines 2, provided with a shut-off valve 3, and is provided with at least one fitting with a pre-installed heat-resistant valve 4 vacuum system, equipped with at least one vacuum pump 19, and a dosing system and loading of bulk components.

Before filing loose components in the reactor 1 includes a vacuum system explosive environment of the reactor 1 and in achieving the necessary degree of the vacuum open thermostable flap 4, and after the introduction into the reactor 1 of the required number of these components close the flap 4, sealing the reactor 1.

Dosing and loading of bulk components includes retrival 13, the hopper 14 on tantoush, pneumodynamic 15, Ripper 16, screw the Complainant 17 and the above-mentioned heat-resistant flap 4 on the nozzle reactor 1. Pre-loading of bulk components is carried out in separate bins (not shown)equipped with a load cell to regulate the metered load and unload components, the subsequent filing of these components carry pneumomechanical 15 in the Ripper 16, then submit them to the reactor 1, including feeding by screw bearer 17, and vacuum system include before screw supply bulk components.

As loose components in the production of alkyd varnishes used, at least, necessary for the production process alkyd varnish components, wybran the e group, including pentaerythritol, phthalic anhydride and optionally maleic anhydride.

Before applying loose components in the reactor 1 create a vacuum depth of not less than 0.15 MPa, preferably 0.2 ATM. The create a vacuum by the vacuum pump 19, provided with inlet and outlet nozzles, the latter communicated with the external atmosphere.

Supply of loose components in the explosive environment of the reactor is carried out sequentially with screw applicants 17.

Regulation valves when loading loose components in the reactor 1 is carried out remotely, automatically displaying operations on the monitor or the mnemonic (not shown). The on-off system degassing explosive environment of the reactor 1 is carried out remotely, automatically displaying operations on the monitor or the mnemonic while the system is turned off vacuum explosive environment of the reactor 1 is produced preferably after heat-resistant closure flap 4.

Below is an example illustrating the method according to the invention, but not limiting it.

Example 1.

Production of alkyd varnish.

Loading of liquid components in the reactor 1 and the mixer 11 from an existing warehouse 20 liquid raw materials (collections of oil, xylene, white spirit) are carried out by the individual technological Tr is aprovada 2.

Loose components served in bags on pallets in prizepool warehouse solid raw materials from the factory warehouse of raw materials existing truck.

The dosage of white spirit and xylene in the reactor 1 is produced by using a liquid counter 21, and the dosage of white spirit and solvent in the mixer 11 according to the testimony of tensives on which the mixer is installed. When overlapping the power line automatically stops the feed pump 22 in stock 20 liquid raw materials.

Vegetable oil is metered into the reactor 1 mass flow meters. Upon completion of a given dose automatically stops the feed pump 22 in stock. Setting the dose and unit selection is made from the premises KIP.

The production of varnish is carried out, for example, periodic azeotropic method.

Alkyd varnish is a solution of pentaftalevyh resin in white spirit and solvent. Synthesis of resin is provided in the reactor 1 with a capacity of preferably 16,0 m3with the system of magneto electric heating, is provided with a single fitting with pre-installed heat-resistant valve 4, mainly three coils 5, the agitator 6 and equipped with a Packed column 7, the vertical heat exchanger-refrigerator 8, capacitor 9 and the separation vessel 10.

Synthesis of resin includes the stage of transesterification (alcoholysis) of vegetable oil p is enteritica at a temperature (250± 5)°in the presence of a catalyst - soda ash and polyesterification.

In the reactor 1 download sunflower oil pump from the mixer 11 is preheated to a temperature of 70°or the feed pump 22 directly from the warehouse 20 liquid raw materials through the mass flowmeter. Then download the pentaerythritol and soda ash.

The contents of the reactor 1 is heated to a temperature (250±5)°and at this temperature withstand up to obtain solubility of the sample in ethanol in a ratio of 1:5. The reactor 1 is equipped with a sampler.

Heat the oil and the transesterification is carried out in a current of inert gas fed through a rotameter on the layer of the reaction mixture.

After aging the reaction mass is cooled to ˜180°With water supply to the coils 5, and loads of phthalic anhydride. When loading phthalic anhydride reactor 1 through the heat exchanger 8 is connected to the vacuum system of the current production of varnishes for the recovery of phthalic anhydride and acrolein out from the reactor 1. The existing node capture includes the Packed column 7, irrigated with a solution of alkali.

The process of polyesterification reaction accompanied by the release of water. For its removal in the reactor 1 download xylene.

The azeotropic mixture of the xylene-water, passing through the Packed column 7, condenser is raised in the heat exchanger 8 and is fed into the separation vessel 10, where xylene through an overflow pipe is recycled back into the reactor 1 and the water flows into the machine.

The process of polyesterification carried out at a temperature (250±5)°With up to required parameters viscosity and acid number, the temperature in the reactor 1 is maintained automatically.

When reaching the required indexes the contents of the reactor 1 is cooled to a temperature of 160-180°and when the supply of inert gas into the reactor 1, the resulting resin is poured into the mixer 11 under the layer of pre-loaded solvent (white spirit and solvent).

The mixer 11 with a capacity of preferably 25 m3installed on tantoush frame and equipped with a stirrer, jacket and heat exchanger 12.

The resin is mixed with a solvent to obtain a homogeneous solution, and the obtained varnish put "like" on the viscosity and the mass fraction of non-volatiles to achieve the required performance. Finished paint pump 23 is fed to the filtering cartridge filter 24, which comes to the collection of 25 finish varnish with a capacity of preferably 25 m3.

Thus, the synthesis of alkyd (pentaftalevyh) lacquer carry out periodic azeotropic method on the unit, shown in figure 2.

The following describes the work also illustrates how supply bulk components in the reactor with a potentially explosive environment.

Before starting the work item is overall reactor 5 purity visual inspection through the hatch. Check the bottom valve of the reactor 5 for proper opening and closing of the valve. Check the agitator trial inclusion. Check the connection of Instrumentation and visual.

Transesterification (alcoholysis) of vegetable oils.

Empty the reactor 1 before you download it oil is heated to the temperature of the wall (90-95)°S. provisioned reactor 1 download oil, preheated to (70-80)°, warehouse 20 liquid raw material feed pump 22 according to the technological map. After loading oil close valves on the load line of the oil in the reactor 1 includes a mixer 6, the lighting and heating of the reactor 1.

At a temperature of 90°include the supply of inert gas is nitrogen through the rotameter on the layer of the reaction mass, by setting the feed speed of 2-2 .5 nm3/hour.

In the interval of temperatures (110-120)°With heat stop and maintain the oil at this temperature for 0.5 to 1 hour in order to avoid foaming due to the potential for moisture. After cessation of foaming continue heating.

During the exposure, the flow of cooling water in the refrigerator 8 is reduced to a minimum.

If in accordance with the receipt and routing provides download rosin, the temperature in the reactor 1 was raised to 150°and cut off the supply of inert gas to react is R 1. The reactor 1 through a capacitor 9 is connected to the vacuum created by vacuum pump 19, through the Packed column 7, irrigated with a solution of alkali vapour recovery harmful substances from the reactor during the loading of bulk components.

Download solution of rosin in an automatic reactor is in the form of its solution in the oil pump on technological pipeline, but the preparation of a solution of rosin oil is located on a separate mixer (not shown).

After downloading rosin resume the flow of nitrogen and heated the reaction mass.

Upon reaching 250°cut off the supply of nitrogen and connect the reactor 1 to the vacuum diagram. Loaded into the reactor 1 pentaerythritol and desiccant lead (octoate lead) according to the technological map. After the load is disconnected vacuum system reactor comprises feeding an inert gas through a rotameter with a feed rate of 2-2 .5 nm3per hour and continue heating the reaction mass.

The reaction of alcoholysis of vegetable oils pentaerythritol (transesterification) is conducted at a temperature not exceeding 265°C. After reaching the temperature of 265°To make the excerpt for (1-2) hours and begin sampling intervals (15-30) minutes to check the degree of interesterification.

The interesterification process is considered complete when achieving the AI solubility of the sample in ethanol in a ratio of not less than 1:5 by volume at a temperature (23-27)° C. If after holding the reaction mass for about 2.5-3.0 hours at a temperature of 265°will not be achieved solubility in the ratio of 1:5, but not less than 1:2, the process of transesterification (alcoholysis) is also considered to be completed.

After completion of the process of interesterification heating of the reactor 1 is switched off and the reaction mass is then cooled through the coils 5 to temperature (180-220)°and stop the flow of inert gas.

Stage polyesterification

After cooling the reaction mass to (180-220)°With the reactor 1 is connected to the vacuum system of the reactor.

Loaded into the reactor 1 phthalic anhydride, maleic anhydride, if necessary, according to the technological map. The reaction mass is heated to 180°and make the exposure at this temperature for 1 hour.

The reaction polyesterification (polycondensation) is emitting reaction of water in the amount of one kg/mol per kg/mol of phthalic anhydride, the free fatty acid and rosin. To facilitate the removal of water from the reaction zone is added to the reactor 1 xylene in a liquid meter in the amount indicated in the flow chart, warehouse 20 liquid raw materials for technological pipeline feed pump 23. For the process of circulation of xylene (azeotropic distillation of water) use recycled xylene.

PA is s water in the form of an azeotropic mixture with pairs of xylene send in a Packed column 7 and refrigerator 8, cool, the excess xylene condenses and flows back to the reactor 1, and the azeotropic mixture and nscontainerframe part of xylene is fed to the condenser 9 where it condenses and flows into the separation vessel 10. In the lower part of the separation vessel meets the water with partially dissolved by xylene, in the upper part - xylene with partially dissolved by water.

The xylene from the separation vessel 10 through the overflow fitting and hydraulic lock flows back to the reactor 1 or served for irrigation in the upper part of the Packed column 7. At the beginning of the polycondensation process for 4-6 hours distant xylene served on the Packed column 7 to trap vapors of phthalic anhydride and return it to the reaction mass.

After this time switch the supply of distant xylene directly into the reactor 1, and the flow of cooling water in the refrigerator 8 change to a minimum, always leaving a small expense.

Since the circulation of xylene begins the conclusion of the reaction of moisture from the reaction zone in the separation vessel 10.

After each discharge of the reaction water from the circulation system of xylene derive the appropriate number of xylene, and the temperature of the reaction mass is gradually increased.

Since the circulation of xylene, using the above-mentioned processing method, raise the temperature of the reaction mass up to 220° C for not more than (3.5 to 5 hours. The technological process is carried out in the temperature range (220-240V)°to reach an acid number of not more than 10 at a constant circulation of xylene.

After reaching an acid number of 10, if necessary, the temperature of the reaction mass gradually raise and lead the process of increasing the viscosity to a value of stopping values. With a chain of increasing the viscosity of possible technological process with a weak circulation xylene.

Upon reaching the required parameters on viscosity and acid number off heating and cooling the resin to (150-180)°using the flow of the circulating water in the coil reactor, as described above.

After cooling the reaction mass to (150-180)°With the water supply to the coil is closed, the water outlet of the coil is left open.

After cooling analyze the resin viscosity and acid number.

The viscosity of the resin before discharge into the mixer must not be lower than specified in the routing and an acid number of not more than 10 mg KOH/g

The resin from the reactor is drained by gravity into the mixer 11. During the discharge of the resin in the mixer 11 rinse the reactor 1. This is poured into the mixer 11 approximately one third of the resin. Stop the mixer 6 and the load on the remaining resin (500-1000) litres of white spirit. Continue draining the resin in the mixer without the remesiana. Hot pair of white spirit rise in the vertical portion of the reactor are condensed and flow down the walls of the apparatus, washing it. Before downloading white spirit for leaching open maximum flow of cooling water in the refrigerator 8, to avoid ingress of solvent vapor in the separation vessel 10. After discharge of the reaction mixture in the mixer closed bottom valves of the reactor and load it (500-1000) l white spirit. Heat the solvent under stirring to a temperature (80-100)°C, kept at this temperature (0.5 to 1) hour and the solvent is drained to the main mass in the mixer 11. The number loaded into the reactor of the solvent into account by dissolving the resin and setting the "type".

Dissolution of the resin and the production of varnish on the "type"

Dissolution of the resin and the production of varnish on the type carried out in the mixer 11, provided with a jacket for cooling circulating water, a stirrer and equipped with a heat exchanger 12. On the basis of the viscosity of the obtained resin in addition to white spirit can be used solvent and xylene. The use of recovered xylene for the production of "type" is not allowed.

For the production of varnish on the "type" is loaded into the mixer 11 through the meter white spirit in accordance with the routing. In the jacket of the mixer and heat exchanger 12 serves water, include the stirrer.

With the Olu of reactor 1 at a temperature (150-180)° With discharge into the mixer 11. Resin pereshivayut with the solvent until a homogeneous solution, which can be verified by loading the sample on the glass, then make the production of varnish on the type on viscosity and the mass fraction of non-volatiles in accordance with the technical specifications by adding solvents.

Solvent vapours formed during the dissolution of the resin flow to the heat exchanger 12, condense and drain back into the mixer 11.

In the formulation of the lacquer on the type solvents are used: white spirit, solvent, xylene.

After each additive solvent solution of the resin is thoroughly mixed for at least (1-2) hours, and the paint checked for compliance with SPECIFICATIONS.

The varnish must meet the following criteria:

the viscosity of the varnish at (20±0,5)°With (50% solution in white spirit) viscometer B3 - 246 with the nozzle diameter of 4 mm must be at least 70;

- an acid number of not more than 10 mg KOH/g for the top grade, not more than 15 mg KOH/g to 1 grade:

- mass fraction of solids of not less than (60±2)% or

the viscosity of the varnish at (20±0,5)°With the viscometer B3-246 with the nozzle diameter of 4 mm must be (60-80);

- an acid number of not more than 12 mg KOH/g for the top grade, not more than 15 mg KOH/g for 1st grade, not more than 20 mg KOH/g to 2 varieties;

- mass fraction of solids (52-55)% for the highest grade, (51-55)% for 1 and 2 grades.

p> To achieve these indicators lacquer from the mixer 11 is fed to the filter. The temperature of the varnish before the filter should be (50-60)°With, but not below 40°C.

Example 2. Synthesis of alkyd resins using fatty acids of tall oil (ICTM) or distilled tall oil (DTM).

Empty the reactor 1 before you download it ICTM (DTM) is heated to the temperature of the walls (95-100)°C. prepared In the reactor 1 download ECTM (DTM), preheated to (70-80)°C, the feed pump warehouse 20 liquid raw materials in quantity, according to the technological map.

After downloading ICTM (DTM) include the mixer 6 and the heating of the reactor 1.

In the case when the routing laid formulation containing rosin, upon reaching 150°, download portions, as described above. After downloading rosin mass is heated to 200°Since, as described above.

If the download rosin is not provided, then ICTM (DTM) is heated to 200°C.

Then loaded into the reactor 1 pentaerythritol, phthalic anhydride and xylene on the circulation accordance with the flow chart as described above.

The process is conducted similarly to the process using vegetable oil.

This is illustrated below describe how supply bulk components in the reactor with a potentially explosive atmosphere (for example, production is alkidnyh varnishes), at the same time shows and the use of the automated control system in the production of alkyd varnish according to the invention.

1) Carry out the loading of oil from pricegouge collector through a mass flow meter. The pump remote from the shield Instrumentation with remote control. Disabling automatic pump for a given dose.

Close-open shutoff valve on the load line of the oil in the reactor is carried out remotely, automatically and is controlled from the control panel of the shield Instrumentation display operations on the PC and the mnemonic.

2) Carry out the loading of pentaerythritol and phthalic anhydride in the reactor using the automated loading system of the loose components, consisting of a bunker on tantoush, pneumomechanical, Ripper, auger giver and heat-resistant valve on the nozzle reactor. This system is controlled by PC with the remote control panel Instrumentation. Loading starts to signal the operator and ends automatically at a specified dose. The system automated the download also includes the site of unloading to fill the bunkers on tantoush bulk raw materials. The change in weight of the hopper is automatically fixed on the scoreboard in the area of rattributes and displayed on the remote control panel Instrumentation.

3) Carry out the loading of the solvent in the reactor aseat apnoe boiling and rinsing of the reactor through an electronic meter with remote automatic control valves and pumps control panel of the shield Instrumentation. Disabling the pumps automatically after loading a given dose. The number of the loaded solvent is displayed on the PC monitor. The condition of valves and pumps is displayed on the PC monitor and on the diagram.

4) the Distribution of flow xylene azeotrope and emptying of the separator vessel carried out remotely, automatically from a control panel in panel Instrumentation display position of valves on the diagram.

5) Supply and regulation of the circulating water is carried out remotely and automatically from a control panel in panel Instrumentation display position of valves on the diagram. Regulation of water supply to the condenser can be implemented in automatic mode according to the value of the set temperature.

6) the water Supply to the coils of the reactor is carried out remotely and automatically from a control panel in panel Instrumentation display position of valves on the monitor and the mnemonic.

7) Faucets installed on tantoush displaying the weight on the scoreboard at the place and display readings on the monitor and display on the remote control panel Instrumentation.

8) the Flow of solvent in the mixer, i.e. the control of shutoff valves and pumps, carried out remotely automatically according to the set dose from the remote control panel Instrumentation display position locking the valve and pump status on the monitor and the mnemonic in the shield Instrumentation.

9) When filtering the flow regulation of the circulation automatically at the specified pressure on the pump. Control of shutoff valves and pumps automatic remote control panel in panel Instrumentation with the display status of valves and pumps on the monitor and on the diagram.

10) the operation of vacuum pumps host remote automatic with remote control panel Instrumentation display pump status on the monitor and the mnemonic.

All this allows you to secure the entire process, to make it environmentally friendly, to ensure the stability conditions for all stages and process in General, as well as the stability of properties of the resulting varnish.

The table below presents basic properties of alkyd varnish according to the invention.

Varnish alkyd pentaftalevyh qualitative characteristics and meets the values specified in the table.

p/pIndicesValueTest methods
top gradegrade 1
12345
1Color l is CA by iodometric scale, mg J2/100 cm3not darker1580According to GOST 19266 1
2The appearance of the lacquerTransparent, slight opalescence (weak blushing or opacity)In paragraph 4.3 THE
3Clean lacquerThe layer of varnish deposited on the glass plate should be transparent. Should not have a mechanical inclusions and blemishesIn section 4.4 THE
4Mass fraction of non-volatile substances, %, not less than60,060,0According to GOST 17537 and p TU
5Viscosity at the temperature of (20,0±0,5)°With (50%solution in white spirit) viscometer VZ-246 or VZ-4 with the nozzle diameter of 4 mm, not less than7070According to GOST 8420 and THAT clause 4.6
6Acid number, mg KOH/g, max1015According to GOST 23995 met and THAT clause 4.6
7The hardness of the film of varnish, conventional units, pendulum device type TML (pendulum a) not less than0,120,12According to GOST 5233
8Drying time to degree 3 h, maxAccording to GOST 19007
at a temperature of (20±2)°24,024,0
at the temperature of (80±2)°2,02,0

Thus, as follows from the presented data, the claimed group of inventions allows to obtain alkyd varnish with high stable performance properties more perfect environmentally friendly and fire-method; the use of the automated process control system can be directed to adjust and monitor the condition of the individual stages of the process (the flow of bulk components in the reactor, for example) and the whole process in General. This, in turn, can be directed to obtain a varnish with a stable set of characteristics, regardless of the choice of the starting components.

1. Method for the production of alkyd varnish, characterized in that it includes the transesterification - alcoholysis of vegetable oil pentaerythritol when heated in a current of inert gas in the presence of a catalyst, subsequent polyesterification products of interesterification of phthalic anhydride when heated, the water distillation azeotropic solvent, cooling the reaction product of an alkyd resin to 160-18° With, the preparation of a varnish obtained by mixing the resin with an organic solvent, the process of interesterification and polyesterification carried out in a equipped with a system of magneto electric heating reactor provided with technological pipelines, equipped with shutoff valves, and at least a reactor provided with a fitting with a pre-installed heat-resistant valve, and also has no less than two water heat exchangers in the form of coils, stirrer, Packed column, vertical refrigerator, condenser and separator vessel, with the dissolution of alkyd resins is carried out in a mixer fitted with shutoff valves, a stirrer, a jacket and a reflux heat exchanger for condensation and return to the mixer evaporating solvents, and dosage and loading of vegetable oil in the reactor is carried out using an automatic control system in which the closing-opening shut-off valves on the load line of the oil in the reactor is carried out automatically and remotely control the process from the control panel, dosage and loading loose components, such as pentaerythritol and phthalic anhydride in the reactor is carried out and controlled by an automated control system dosing and loading of bulk components, including races is arival, the bunker on tantoush, pneumodynamic at least one Ripper, screw the Complainant and the above-mentioned heat-resistant valve on the nozzle reactor; dosage and download azeotropic solvent, water in the coils of the reactor, and the supply and regulation of recycled water, the flow of solvent in the mixer is implemented with remote automatic control valves.

2. The method according to claim 1, characterized in that the visualization process is carried out by displaying the position of the valves, the other nodes of the equipment used and process parameters at least one monitor and the mnemonic.

3. The method according to claim 1, characterized in that, as the vegetable oils used sunflower oil.

4. The method according to claim 1, characterized in that the quality of vegetable oil use soybean oil.

5. The method according to claim 1, characterized in that the quality of vegetable oil use saffron oil.

6. The method according to claim 1, characterized in that the quality of vegetable oil use fatty acids taly oil.

7. The method according to claim 1, characterized in that the quality of vegetable oil use fatty acids of vegetable oil.

8. The method according to claim 1, characterized in that the quality of vegetable oil use distillirovannoi taly oil.

9. The way p is 1, characterized in that the catalyst used soda ash or desiccant, in particular lead desiccant, such as octoate lead.

10. The method according to claim 1, characterized in that at the stage of polyesterification impose additional maleic anhydride.

11. The method according to claim 1, characterized in that at the stage of interesterification of the United States impose additional rosin.

12. The method according to claim 1, characterized in that after loading into the reactor vegetable oil content of the reactor is heated to a temperature interesterification not less than 240°and maintain to obtain solubility of the sample in ethanol in the range of ratios from 1:2) to (1:10), and the process of heating and interesterification of oils is carried out in a current of inert gas, preferably nitrogen.

13. The method according to claim 1, characterized in that the reactor is equipped with adjustable include a vacuum system and a recovery system carry out from it phthalic anhydride and acrolein, while vegetable oil load pre-heated in the reactor, which in turn also preheated to a temperature of not less than 50°With, then download the pentaerythritol and download phthalic anhydride is produced at the end stage of transesterification and cooling to a temperature not less than 200°and loading of pentaerythritol and phthalic anhydride pre is Aut connecting the reactor to the vacuum system of the current production of varnish and carry out recovery system from the reactor phthalic anhydride and acrolein.

14. The method according to claim 1, characterized in that the process of polyesterification carried out to achieve the required performance viscosity and acid number alkyd resin.

15. The method of delivery of bulk components in the reactor with a potentially explosive atmosphere, for example, in the production of alkyd varnishes, characterized in that the reactor is in communication with the technological pipelines, equipped with shutoff valves, and provided with at least one fitting with a pre-installed heat-resistant valve, vacuum system, equipped with at least one vacuum pump, and a dosing system and loading of bulk components, prior to the filing of loose components in the reactor include a vacuum system explosive environment of the reactor and upon reaching the desired degree of the vacuum open-resistant damper, and after the introduction into the reactor required number of said components close said valve, sealing the reactor.

16. The method according to item 15, wherein the dosing and loading of bulk components includes retrival, the bunker on tantoush, pneumodynamic, Ripper, screw the Complainant and the above-mentioned heat-resistant valve on the nozzle reactor, the pre-loading of bulk components operate in separate silos, equipped with a load cell and to regulate the metered load and unload components, the subsequent filing of these components carry pneumomechanical in the Ripper, then submit them to the reactor, including a screw feed and vacuum system include before screw supply bulk components.

17. The method according to item 15, wherein as loose components in the production of alkyd varnishes used, at least, necessary for the production process alkyd varnishes components selected from the group comprising pentaerythritol, phthalic anhydride, maleic anhydride.

18. The method according to item 15, wherein before applying loose components in the reactor create a vacuum depth of not less than 0.15 MPa, preferably 0.2 ATM.

19. The method according to item 15, wherein the vacuum creating means of the vacuum pump supplied with inlet and outlet nozzles, the latter communicated with the external atmosphere.

20. The method according to item 15, characterized in that the supply of loose components in the explosive environment of the reactor is carried out sequentially by means of a screw of the applicants.

21. The method according to item 15, wherein the regulating valves when loading loose components in the reactor is carried out remotely automatically display operations on the monitor or the mnemonic.

22. The method according to item 15, wherein the on-off system which we degassing explosive environment of the reactor is carried out remotely automatically display operations on the monitor or the mnemonic, when the system is turned off vacuum explosive atmospheres reactor to produce, preferably, after the closure is heat-resistant flap.



 

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Pigmental paste // 2328512

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4 tbl

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2 tab

FIELD: chemical technology, in particular paint composition based on alkyd resin useful in production of protective-decorative covers for wood and metal.

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2 tbl, 2 ex

Paint // 2296146

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5 tbl, 4 ex

FIELD: paint-vehicle materials for protection and ornamental decoration of metal surfaces.

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2 cl, 2 tbl

FIELD: chemistry of polymers, chemical technology.

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2 cl, 1 tbl, 5 ex

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10 cl, 5 tbl

Pigmental paste // 2328512

FIELD: chemistry.

SUBSTANCE: invention relates to the pigmental paste for paint toning. The pigmental paste for toning the covering composition is described, where the pigmental paste includes: at least one ramified alkide with the viscosity less than 5 Pa·s at 23°C and shift rate 100 c-1 and the number-average molecular weight Mn>1500, which contains the groups for the oxidising drying produced from the fatty acids; one or several solvents without aromatic substances - 28 mass percent; and one or several pigments. At that, the rate of alkide ramification is at least 0/35 and preferably less than 0.42, alkide fatness is at least 76 and preferably less than 84, the alkide acidity index is within 6 to 9 mg KOH/g; the solvent without the aromatic substances contains the aliphatic hydrocarbon solvents, ketones and/or complex ethers with molecular weight Mn>1500. The method for paint toning is described where the principal paint is selected from the set of principal paints and then mixed with the said pigmental paint, at that, the principal paint corresponds to the composition based on solvent and containing alkide.

EFFECT: invented pigmental paint is useful in toning paint with high concentration of solid substances.

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Priming composition // 2322467

FIELD: protecting materials.

SUBSTANCE: invention relates to priming compositions used for anticorrosive covers applied on surface of mainly ferrous metals in machine engineering, and woody and other materials. The priming composition comprises lacquer GF-01, red pigment, siccative, solvent, chalk of sort M-5 and lecithin as a disperser, siccative NF-1 as a siccative, and slime after dry scrubbing in electric steel melting production of the following chemical composition, wt.-%: SiO2, 7.76; phosphorus (P), 0.041; chrome (Cr) total, 1.0; Al2O3, 0.93; TiO2, 0.099; MnO, 2.29; CaO, 21.3; MgO, 24.5; FeO, 3.91; Fe2O3, 32.02; CaF2, 5.26; CaO (incompletely burned material), 0.89 in the following granulometric composition of slime, %: below 20 mcm, 15; from 20 to 25 mcm, 60, and from 25 to 100 mcm, 25. Invention provides decreasing cost and enhancing exploitation parameters of the priming in coating the broad spectrum of surfaces in machine engineering and building.

EFFECT: improved and valuable properties of priming composition.

5 tbl

FIELD: polymeric materials.

SUBSTANCE: invention relates to polymeric protective materials and can be used for creature of anticorrosive covers. Photohardening composition for cover comprises the following components, mas. p. p.: polysulfide oligomer, 5-10, unsaturated polyester resin, 100-105, and a photoinitiating agent, 3-6. Resin of sort PN-9119 is used as unsaturated polyester resin that represents products of polycondensation of propylene glycol with dimethylterephthalate and maleic anhydride dissolved in styrene (the styrene concentration is 35-45%). Proposed composition provides the high hardening rate to obtain materials showing the high cross-linking frequency and regularity of structure that enhance bending and stretching strength, resistance against corrosion and adhesion properties of the cover.

EFFECT: improved and valuable properties of composition.

2 tbl, 10 ex

FIELD: paint and varnish materials.

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EFFECT: improved and valuable properties of paste.

4 tbl

FIELD: household chemical goods.

SUBSTANCE: invention provides composition for applying self-oxidizing architectural coating, which is suitable for handling by inexperienced users having no personal respiratory protection devices at ambient temperatures and natural day light. Composition contains self-oxidizing polymeric binder and promoter system to promote self-oxidation of the binder, which promoter contains from 0 to 0.01 wt % cobalt ions and metal ions other than cobalt ions promoting surface self-oxidation in amount 0.001 to 0.04 wt % and those promoting bulk self-oxidation in amount 0.5 to 2 wt %, and also at least one photoinitiator in amount 0.3 to 2 wt %, all based on the weight of binder. This composition is applied onto surface to obtain dried architectural coating irradiated by low-energy radiation in the form of light with wavelength between 350 and 650 nm. Composition removes need of utilizing larger than trace amounts of cobalt ions, which are considered to be carcinogenic, and ensures achievement of suitably high self-oxidation rates. No cobalt utilization is preffered. Utilization of low concentrations of other metal ions leads to reduction in composition color variation, often al levels lower than those achieved when utilizing common cobalt promoters.

EFFECT: avoided need of high-energy irradiation and accurately controlled conditions, and improved luster of coating.

7 cl, 4 dwg, 7 tbl, 9 ex

FIELD: ferrous metallurgy; oil refining industry; building industry; chemical industry; compositions for production of the anticorrosive zinc-containing base coatings.

SUBSTANCE: the invention is pertaining to the compositions for production of the anticorrosive zinc-containing base coatings intended for a sacrificial protection from corrosion of the products, buildings and constructions made out of the ferrous metals exploited in the atmospheric conditions, in the conditions of water-saline mist, in the medium of the oil products vapors and aerosols. The composition for production of the antirust coating includes the fine-dispersive zinc powder, the three-metal desiccant, the toluene, the modified alkyd film-forming substance, in the capacity of which they use the short-alkyd varnish with addition of the tung oil, modified with the phenol-formaldehyde resin in amount of no more than 5.0 % of the mass of the alkyd film-former, with the acid number of no more than 15.0 mgKOH/g of the film-former and the dynamic viscosity after Brunkfild - 2.0-4.5 Pa·s, and the antisediment additive, in the capacity of which use the admixture of zinc oxide, lecithin and the organophilic bentonite of SD-1 brand. The composition has the high sediment stability at storing and at coating, dries faster and ensures production of the antirust coatings with the heightened resistivity to the water and petroleum action.

EFFECT: the invention ensures production of the composition having the high sediment stability at storing and coating, the fast drying and used for application of the antirust coatings with the heightened resistivity to the water and petroleum action.

2 tab

FIELD: ultraviolet-hardened powder compositions based on oligoether(meth)acrylates, possible use for producing lacquer covers on both non heat-resistant (wood, plastic, assembled structures) and metallic substrates, which are used in production of furniture, construction, mechanical engineering and other industrial branches.

SUBSTANCE: ultraviolet-hardened powder composition for lacquer covers is described, including film-forming agent component in form of two-component system of oligoether(meth)acrylate and second non-saturated compound with molecular mass equal to 500-970 g/grammolecule, produced by synthesis from p-hydroxyethoxystyrene and diisocyanate, selected from a row: 1,6-hexamethylenediisocyanate, 2,4-toluyelenediisocyanate, isophoronediisocyanate, 4,4'-methylene-(biscyclohexyldiisocyanate) or produced by synthesis from p-hydroxyethoxystyrene, diisocyanate, selected from a row: 1,6-hexamethylenediisocyanate, isophoronediisocyanate, 4,4'-methylene-(biscyclohexyldiisocyanate) and multi-atomic spirits, selected from a row: neopentylglykol, 1,6-hexanediole, while two-component system of film-creating agent contains components in accordance to ratio, appropriate for ratio of non-saturated double links of oligoether(meth)acrylate and non-saturated composition with molecular mass M=500-970 g/grammolecule, within limits from 1:1 to 1:1,2, photo-initiator of benzoyl type, filling agent and degassing agent, with stated ratio of components.

EFFECT: suggested ultraviolet-hardened powder composition allows production of lacquer covers with improved properties - increased chemical stability and high level of physical and chemical properties with preservation of decorative and protective properties.

1 cl, 2 tbl, 46 ex

FIELD: chemical technology, in particular paint composition based on alkyd resin useful in production of protective-decorative covers for wood and metal.

SUBSTANCE: claimed protective-decorative paint includes film-forming agent based on alkyd resin, pigment, drying accelerator, and solvent. As pigment paint contains white pigment such as titania and colored pigment such as wolchonskoit mineral powder.

EFFECT: environmentally friendly paint with good appearance, high adhesion to surfaces and protective effects.

2 tbl, 2 ex

Paint // 2296146

FIELD: chemical technology, in particular paint composition based on alkyd resin useful in production of protective-decorative covers for wood and metal.

SUBSTANCE: claimed protective-decorative paint includes colored pigment such as wolchonskoit mineral homogeneously dispersed in liquid binding agent medium, selected from group containing acryl-rubber, epoxy, alkyd resins or varnish in amount of wolchonskoit 10-90 mass %, liquid binding agent 90-10 mass %, wherein liquid binding agent may contain special additives.

EFFECT: paint with increased performance characteristics.

5 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: method of obtaining alkyd resin includes the operation of mixing in a capacity reactor, connected to a flowing tubular reactor, vegetable oils and polyatomic alcohol in the presence of a catalyst - 10% solution 2-ethylhexanate lead and while heating and the subsequent poly-etherification in the presence of dicarboxylic acid and xylene. Supply of the catalyst is carried out through a measuring hopper, connected at the inlet of the flow reactor, at a speed of not more than 10 l/min. at the poly-etherification stage to the reaction mass is added 10% paratoluenesulfonic acid solution to the xylene at a speed of not more than 10 l/min. Loading of this solution is also carried out through the measuring hopper of the flow reactor.

EFFECT: colour reduction of alkyd resin solution and acceleration of drying of coatings based on it while using reactors of large volumes and increasing the quality of varnish obtained from alkyd resin.

1 cl, 1 dwg

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