Non-hydrogenating plaster composition and preparation method thereof

FIELD: chemistry.

SUBSTANCE: invention relates to plaster-like material and can be used in coatings and articles. A faced panel includes a structural panel and a dried coating which contains calcium sulphate hemihydrate in a latex polymer matrix free from water and containing a two-component agent which prevents setting. The facing mixture contains calcium sulphate hemihydrate, a latex emulsion polymer, a two-component agent consisting of a low-molecular weight polymer and a phosphonic acid compound, sulphates or mixtures thereof, and water.

EFFECT: invention shortens the duration of finishing a wall and reduces the number of coating steps, has operational characteristics and working quality of plaster.

9 cl, 3 tbl, 4 ex

 

The level of technology

The present invention relates to products, for example, coated building panel containing hemihydrate of calcium sulfate. More specifically, it relates to shtukaturnaya material for use in coatings and products, which resembles the working qualities of the plaster when applied, but not hydrated.

Gypsum is a common material that is widely used in construction industry for various applications. The usefulness of this material caused, at least partially, its low cost and the ability to form it into essentially any shape. Hemihydrate of calcium sulfate, also known as plaster, or consisting of calcined gypsum is mixed with water to form a paste or slurry. The suspension is formed by any known means, such as, but not limited to the above, the casting in the form of a spray, spill on the surface or applying with a trowel. Hemihydrate of calcium sulfate reacts with water in the hydration reaction with the formation of an interconnected matrix of hardened crystals of the dihydrate of calcium sulfate (gypsum). Despite frequent some shrinkage, gypsum, in General, keeps the form in which it was formed before the completion of the reaction setting.

Interior walls are typically made of a GI is the lack of panels, for example, gypsum panels SHEETROCK brand®, cement panels, etc. while the use of the panels allows rapid coverage of large surfaces, walls, joints between panels must be trimmed to obtain a monolithic surface, which is ready to receive paint or other decorative finishes.

Trim panels is usually time-consuming process. After the panels are hinged, the coating of the connecting material is applied to the seams and nail heads. When drying, the connecting material shrinks, leaving a depression in the weld area, which is dried last. Connecting material left to be dried overnight, then when it dries completely, it is subjected to sanding. Dust after sandblasting removed with abrasive material or a damp sponge. Put the second floor of the connecting material and left to be dried overnight followed sandblasted and dusting surfaces. For qualitative work, the process is repeated with the third floor of the connective material. The surface finish takes at least three days, even after the panel is suspended. This method can also be used to repair damaged walls.

Although this process takes time, the result is what I relatively inexpensive smooth monolithic surface. This method is simple, and it can often be performed by landlord without professional help. However, there are deficiencies in the amount of time required to complete such work. In new construction, a set of cabinets, carpet, fixtures and other finishing products suspended pending the completion of the finish. Workers must return to the same site for several days in a row. For the homeowner who makes repairs or performs finishing work, the destruction of homes is prolonged. Re sandblasting the surface leads to the production of fine dust, which penetrates into the closets and cabinets, requiring careful wiping of dust throughout the house. More quick and clean way to finish the walls may be desired by both contractors and homeowners.

An alternative method of finishing the interior walls and ceilings includes applying a protective coating or nakryvki" of plaster on the entire surface of the gypsum panel. This technique results in a more durable surface that is less likely to break, any dents, scratch, or protruding nails than finish by using a connecting material. The surface does not require additional preparation. The use of painted plaster can even extend the need for staining the plaster surface. Single floor plaster an entire wall is faster than applying multiple coatings of the connecting material, taking into account the drying time.

Ready mixed plaster may be desirable for some applications. Such compositions can be applied, for example, for walls, dental applications, castings, molds, machinable materials, spray plasters and other applications, which will be known to a person skilled in the technical field.

In U.S. patent No. 4,661,161 were obtained ready mixed, seizing the connecting materials as the hemihydrate of calcium sulfate as a binder. Additive-setting retarder was added to the wet paste to prevent the hydration of hemihydrate in digitalnow form.

Assumed that hydrating would start by adding the initiator setting immediately before use connecting material. However, it was found that the addition of the retarder setting eventually disintegrates, allowing the hydration during the period of the shelf life of the product.

Ready-mixed, setting the connecting material is described in U.S. patent No. 5,746,822. This composition uses phosphates, for example, tetranitro pyrophosphate, the La prolonged deceleration setting and associated long term storage. However, it was found that such connection materials are unsatisfactory for many applications because they have relatively low strength.

In U.S. patent 5,779,786 described ready-mixed, setting the connecting material using acrylic acid and acrylamide structural elements. Such compositions have a reduced content of cement milk and less precipitation than other piping materials, but they also have low strength, and is only useful in certain applications.

The above compositions are intended for use as interconnect materials and designed for such use. However, a typical connecting material during the application does not have the same "work quality", and that the composition of the plaster. Qualified plasterer knows exactly how much pressure to apply to the trowel to obtain the correct thickness when applied nakryvki or protective coating of plaster on the wall. The use of traditional ready mixed connective material plasterer may require a study of the working quality of the connecting material for its correct application. More important, covering the connective material is a laborious and time-consuming, requiring the application of connection, time of drying and peskett Inoi processing the entire surface, that also creates large amounts of dust. On the other hand, the protective plaster requires only the application and disinfection of plaster to achieve excellent smooth monolithic surface.

Therefore, in this technical field, there is a need in the composition, which has performance characteristics similar to plaster, to facilitate the drawing on the wall, for example, working as plaster, no sandblasting and fewer stages of application.

The invention

The way of finishing the inner walls includes a stage on which to prepare the basis for the construction of the panels and put the covering of the mixture on the canvas, while covering the mixture contains 5-30% by weight of a latex emulsion binder, 40-80% by weight of the hemihydrate of calcium sulfate, up to about 8% by weight of an agent for preventing adhesion, and 20-60% by weight of water. Construction panels made of gypsum cement, or mixtures thereof.

Cover the mixture in accordance with the present invention is a ready-mixed composition for application to a building panel. Ready mixed formulations have advantages compared with traditional plaster, consisting in the fact that there is no need for vehicles to mix shtukaturkoy water at the job site upon receipt of plaster. Water used for mixing the composition has a suitable quality, resulting cover compositions, which are less likely to be involved in undesirable side reactions. Additionally, the plasterer on the site there is no need to spend time preparing batches of plaster to be applied. Ready mixed compositions are also predominant during reconstruction or terminated because they do not require pouring and mixing plaster in packages, which leads to the appearance of dust that can contaminate the already busy living or working space.

Because the mixture is produced with the hemihydrate of calcium sulfate, it has the same performance characteristics for use as traditional plaster. Plasterer, therefore, should be to study the performance of a new composition and should be able to put nakryvku mixture essentially with the same accuracy as traditional plaster. There is no need to re-study of the amount of pressure needed to obtain a mixture of a specific thickness.

Method of finishing of a wall is faster than the coating insulating tape, causing the connecting material and sandblasting. The traditional method requires waiting up to 24 hours between each coat so that soedinitel the hydrated material sufficiently dries to overcoating. When applying the present method can be applied nakryvka mixture followed by a second floor within the same day. At least one, and often two days can be reduced when using this method.

Detailed description of the invention

These and other needs are satisfied by means of the present invention, which relates to a coated building panel and the product containing calcined gypsum. The coated panel contains construction panel and covering the mixture. Hemihydrate of calcium sulfate is dispersed in a latex polymeric matrix as the basis for the mixture. The polymer matrix is substantially free of water and further comprises an agent that prevents sticking, distributed throughout the matrix. A similar mixture of hemihydrate calcium sulphate and latex polymer may also be formed in the product. The agent for preventing adhesion, is also present in both implementations of the invention. Biocides, tools, water retention, anti-settling, anti-cracking and rheology modifiers are optional additives to the polymer matrix.

In carrying out the invention can be applied to any construction panel, including, but not limited to the above, panels of plaster, cement and mixtures thereof. In some implementation, the panel made from gypsum, for example, gypsum panels SHEETROCK brand® from United States Gypsum Co., Chicago, IL. The panels are manufactured using a continuous high-speed process in which paper facing lay on the conveyor. The slurry of hemihydrate calcium sulphate or calcined gypsum, water and additives, pour on the paper and cover the top of the second cladding with obtaining a "sandwich". The plaster mixture is distributed over the entire width of the sandwich and is formed to a constant thickness, and then leave to seize and harden. If the suspension gidrirovannah by approximately 50%, the panels are cut to the appropriate length and move in the kiln for the final drying. At least some implementation of the present invention apply gypsum panels IMPERIAL® from United States Gypsum, Co. (Chicago, IL).

Hemihydrate of calcium sulfate, which is used for the manufacture of the panel may be of any type. The alpha form is available by calcination of gypsum under pressure, making it more expensive compared to the beta form. Gypsum, calcined at atmospheric pressure, is a beta-soda form. Beta-calcined gypsum is more acicular or lamellar crystal morphology compared to the alpha form. Because the alpha form is less needle, it has a better fluidity when dispersed through the years in suspension, requiring less water than the beta form, for equivalent yield.

Cement panels, for example, cement panel brand DUROCK®, made by pouring a slurry of cement, water and additives on the canvas under the plaster or net wrapping material. Until completely hardened, panel cut to size and move in the kiln to speed up the drying process. Cement panels are useful in basements, bathrooms or anywhere where probable is the presence of water. Also considered is the use of panels made from a mixture of cement and calcined gypsum.

The surface of the base is made by joining building panels to the frame of the pins, which forms a support for the wall or ceiling. Adjacent panels are joined back to back with each other, making connections between panels as small as practicable. Panels can be cut to match the size or shape of a specific wall or ceiling and is attached by any means known to such accession. In General, the panels are attached with nails or screws. When joining panels, nails or screws shall be driven into the panel in sufficient depth so that not a single head was not visible above the surface of the base. Each nail or screw leaves a corner is to the surface, filled with the mixture.

The mixture to be applied on the basis contains latex emulsion polymer as a binder. Latex emulsion polymer to form a mixture of a continuous phase, holding it together as in the wet state and after drying of the coating. The exact type and quantity of latex emulsion polymer, which is added depends on the surface on which it is applied. Large concentrations of latex emulsion polymer are more acceptable for use on less porous bases.

Some implementation mixture using a latex emulsion polymer obtained from monomers including vinylacetate, vinylacetate, vinylchloride, ethylene and substituted ethylene. Also useful are polyurethane and polyester emulsion. The polyvinyl acetate is acceptable to the mixture for the application of gypsum panel, but can be also applied to other bases. Preferably, a latex emulsion polymer has a molecular weight of more than 10,000 daltons. The number of latex emulsions are in the range of from about 5% to about 20% by weight, based on the weight of the mixture. Examples of acceptable latex emulsions include AC 1265 polyvinyl acetate homopolymer emulsion, HP 19-176 polyvinyl acetate copolymer emulsion and HP 41-830 vinylated is tnou emulsion, available from Halltech Inc. (Ontario, Canada), and VF-812 methacrylate latex polymer available from Engineered Polymer Solutions, Marengo, IL. The estimated amount of the latex emulsion-based emulsion containing 40-60% solids. When choosing a latex having different solids contents, the total number of latex emulsion should be changed to obtain equivalent weight of latex solids.

Another component of the mixture is the hemihydrate of calcium sulfate. Any type hemihydrate of calcium sulfate is useful in the mixture, as described in the application above with respect to construction panels. If the mixture is applied on the construction panel based on gypsum, used hemihydrate of calcium sulfate, it is not necessarily the same as that used in the construction of the panel, or it may be of another type. Many of the implementation use a mixture of beta-calcined hemihydrate of calcium sulfate. Preferably, the hemihydrate of calcium sulfate is present in amounts from about 40% to about 80% by weight of the mixture.

Agent that prevents sticking, add to the mixture to prevent hydration and setting of the hemihydrate of calcium sulfate. Application palpitates form preserves the "performance" traditional plaster. Adding agent for preventing adhesion, provides the get plaster in the form of ready mixed product eliminating the need to add water and/or additional chemicals on the jobsite. Can be applied to any agent that prevents the setting, it is known to slow the setting of the hemihydrate of calcium sulfate during the shelf life of the product applications, for example, agents for preventing adhesion, which are used in ready mixed setting of connective materials.

In addition to extending the shelf life of the mixture, the agent for preventing adhesion, allows drying of the coating before the hemihydrate of calcium sulfate hydrates in digitalnow form. After applying the mixture on the construction panel, the water begins to evaporate as the drying. Without an agent, prolonged action, preventing adhesion, hemihydrate will also be hydrated by absorbing water with the formation of crystals of the dihydrate. However, this coating prevents the formation of dihydrate. If the coating is dried on the construction panel, the crystals of the hemihydrate of calcium sulfate is dispersed throughout the continuous polymer matrix. After drying the coating, calcium sulfate remains in palpitates form in the coating.

At least some of the implementation in accordance with the present invention use a combination of low molecular weight polymers and connect the deposits of polyphosphonates acid as a two-component agent, to prevent sticking. Both parts of a two-component agent for preventing adhesion, have affinity towards calcium ions and crystalline lattices of calcium sulfate. These two supplements work together to unlimited deactivation mechanism of the stiffening of the suspension of calcium sulfate. This provides a long shelf life Packed plaster product that is still ready for use on the jobsite without adding additional components, for example, water or accelerator setting.

Low molecular weight polymer preferably has a molecular weight component from about 2000 Da to about 6000 Da. Some implementation of low-molecular-weight polymer obtained from monomers including vinylacetate, vinylacetate, vinylchloride, ethylene, styrene, substituted styrene, substituted ethylene and mixtures thereof. The polymers having polyamide frame or carboxylate functional groups, are also useful. The amount of low molecular weight polymer is up to about 8% or from about 0.05% to about 2% by weight, based on the weight of the composition. ALCOQUEST 408 and ALCOQUEST 747 (Alco Chemical, Chattanooga, TN) are liquid solutions and modified polyacrylate polycarboxylate polymers, respectively, having a molecular weight of that component will bring the flax 3000. Such polymers are particularly well suited for use in the mixture.

Small molecules that are part of a preferred agent for preventing adhesion are any number of small molecules. Some small molecules that are useful include polyphosphonate compounds, including, but not limited to the above, tetrahydrofolate, tetrakaidecahedral, aminotri(methylene-fosfonovoi acid), chinatravel salt Diethylenetriamine Penta(methylenephosphonic acid), hexamethylenediaminetetra(methylenephosphonic acid), tetrakaidecahedral and mixtures thereof. Also useful are the esters of postnasal acid. Other examples polyphosphonate compounds described in U.S. patent No. 6,409,824 and 5,788,857, which are incorporated in this application by reference. The number of small molecules, which are used in the mixture is up to about 8% or from about 0.1% to about 2%, based on the total weight of the total composition. Example of an acceptable small molecules is of terkaly pyrophosphate (Astaris, Cateret, NJ).

Water is added to the mixture during production so that the mixture is ready for immediate use on the job site. The exact quantity of water added depends on the desired viscosity of the mixture, typically 90-180 units of Brabender. It is possible to get the ü mixture with the consistency of traditional plaster, paint or connective material. It is preferable that the water was added in the amount of at least 20% by weight of the total composition. For less dense compositions, up to 60% by weight of the composition may be added to reduce the possibility of unwanted chemical reactions, interactions with components in the composition or bacterial contamination, leading to damage.

Construction panel cover for internal or external use. One or more optional additives added to the mixture before application to the building panel to give a mixture of specific physical properties. Examples of acceptable additives include, but are not limited to the above, additives that produce a specific viscosity, Flexural strength, resistance to misuse, water resistance, fire resistance, humidifiers, reagents for reduction of hydraulic losses, anti-cracking, dispersing agents, resistance to mould, drying time, surface hardness, etc. and combinations thereof. Any additives known for use with plaster, may be acceptable for use in this mixture until there is no negative interaction with the latex polymer emulsion or an agent for preventing adhesion, in accordance with the present invention.

Neoba the consequently, add biocide to prevent the growth of mold or bacteria count of the composition during its shelf life. If the composition is used soon after mixing, the biocide is not necessary. However, the addition of biocide necessary to maintain a useful shelf life. The amount of biocide will partly depend on the specific biocide. In the presence of some biocides are present in quantities of from 0.08% to about 0.5% by weight, based on the weight of mixture components. In some implementations, the biocide is present in amounts from about 0.08% to about 0.3 percent. Examples of acceptable fungicides and biocides are well known in the art and include, but are not limited to the above, bactericide TROYSAN® 174, (Troy Chemical Company, Floram Park, NJ) and the fungicide Fungitrol™ 158 (Fritz Chemical Company, Houston, TX).

Humidifier, or a means of keeping water will not necessarily add to the mixture for moisture retention. Preferred humectants include propylene glycol, polyethylene glycol and methoxypolyethyleneglycol. Also known as useful combination of two or all three of glycols. Humidifier, if present, is used in amounts of about 1-10% by weight of the ready-mixed composition. It reduces the water segregation and diversion of water during the shelf life of the product. The polyalkylene glycols t is the train retain moisture during application of the product, giving him a longer setting time. Any funds that hold water, are known for use in plaster or cement suspensions, or architectural dyes, can be used in the mixture. Some implementation mixture include starch or polyacrylamide as a means of retaining water.

Ethylene glycol is also optional add stability during repeated freeze. When applying for such purposes, the ethylene glycol is added in amounts from about 1% to about 5% based on the weight of the composition, and regardless of the presence of any funds that hold water.

A means of reducing the number of cracks, added in amounts from about 0.1 to about 7%, based on the weight of the mixture composition. In the mixture, add the starch, for example, starches STARPOL® (A.E. Staley Manufacturing Co., Decatur, IL) reduces the number of surface cracks in the finished coating.

Another optional component of the coating is a Supplement against deposition. Used from about 0.05% to about 1% by weight of the additive based on the total weight of the mixture components. Additive versus deposition reduces the drain, and the deposition of solids. Examples of additives against deposition include starches, modified starches, modificar the bathrooms clay, for example, modified smectite clay, silicates, for example, modified aqueous sodium lithium magnesium silicates, and mixtures thereof.

The optional thickeners added to the finished plaster in amounts from about 0.05% to about 10% by weight of the ready-mixed composition. Thickeners modify the rheology of the mixture composition for best machinability and give the material a greater resistance to upsetting. Examples of thickeners include modified cellulose, for example, products BERMOCOLL® (Akzo Nobel, Stenungsund, Sweden), suspension of microparticles of polymers, for example, Microspersion™ (Micropowders, Inc., Tarrytown, NY) and micronized polymer powders, for example, products VINNAPAS® (Wacker Chemicals, Munich, Germany).

Obtain multiple realizations demonstrates how to combine components. Individual components are not necessarily combined in any particular order.

At least one implementation in accordance with the present invention begins with an initial two-component dissolution suppressing agent setting in the water. Low molecular weight polyacrylate-containing polymer (0,05-2,0%), polyphosphonate connection (0,1-2,0%) and biocide/fungicide packaging (0,08-0,5%) are added to water (20-60%) and completely dissolved by stirring at about 60 rpm Hemihydrate calcium sulphate (40-80%) )is t in the dry state with modified pre-gelatinizing starch (0.1 to 7.0 percent) for 5 minutes with the formation of a dry mix. Optionally, any combination of dry micronized powder wax/PTFE (0,5-10%), modified smectite clay or Philo-layered silicate clay (0.05 to 1%) may also be included in the dry mixture. The dry mixture is added slowly to the aqueous component under stirring at 60 rpm or less. Finally, polypropylenglycol (1-10%) and latex emulsion (5-20%) are added under stirring at 60 rpm Optional, the dispersion of the wax/PTFE (0.5 to 10%) is also added at this stage. Mixing is complete when large pieces are no longer distinguishable visually, typically 15-20 minutes.

Other implementation include biocide for long shelf life. Low molecular weight polyacrylate-containing polymer (0,05-2,0%), polyphosphonate connection (0,1-2,0%) and biocidal/tuniziano packaging (0,08-0,5%) are added to water (20-60%) and completely dissolved under stirring at about 60 rpm/min Polypropylenglycol (1-10%) and latex emulsion (5-20%) is then added under stirring at 60 rpm for 1-2 minutes. Optionally, the dispersion of the wax/PTFE (0.5 to 10%) can also be added at this stage. Finally, hemihydrate calcium sulphate (40-80%) are mixed in a dry state with modified pre-gelatinizing starch (0.1 to 7.0%) and optionally, any combination of dry micronized powder wax/PTFE (0.5 to 10%) or modificirowan the th smectite clay or Philo-layered silicate clay (0.05 to 1%) for 5 minutes. Mixed in the dry state it is added slowly to the aqueous component under stirring at 60 rpm or below.

Mixing is complete when large pieces are no longer distinguishable visually, typically 15-20 minutes.

Another implementation in accordance with the present invention implemented by combining polyphosphonates connection (0,1-2,0%) and biocide/fungicide packaging (0,08-0,5%), added to water (20-60%) and completely dissolved under stirring at about 60 rpm Hemihydrate calcium sulphate (40-80%) are mixed in a dry state with modified pre-gelatinizing starch (0.1 to 7.0 percent), low molecular weight polyacrylate-containing polymer (0,05-2,0%), and optionally, any combination of dry micronized powder wax/PTFE (0.5 to 10%), modified smectite clay or Philo-layered silicate clay (0.05 to 1%) for 5 minutes. The dry mixture is added slowly to the aqueous component under stirring at 60 rpm or below. Finally, propylene glycol (1-10%) and latex emulsion (5-20%) are added under stirring at 60 rpm Optional, the dispersion of the wax/PTFE (0.5 to 10%) can also be added at this stage. Mixing is complete when large pieces are no longer distinguishable visually, typically 15-20 minutes. At this point in time, to the mixture may be added the ode to obtain the desired viscosity.

EXAMPLE 1

Cover the mixture was obtained using the components listed in Table I. the Polymer solution ALCOQUEST® 408 (National Starch and Chemical Co., Bridgewater, NJ), terkaly pyrophosphate and biocidal/tuniziano packing was added to the water and completely dissolved with stirring at 60 rpm Propylene glycol and the latex emulsion was then added with stirring and stirred at 60 rpm for 1-2 minutes. Finally, the hemihydrate of calcium sulfate were mixed in dry state with starch STARPOL® 136 for 5 minutes. Mixed in the dry state the sample was slowly added to the water component under stirring at 60 rpm or below. Stirring is continued at 80 rpm and it was completed when large pieces were no longer visually distinguishable.

TABLE I
ComponentWeightComposition
Hemihydrate calcium sulphate1698 grams56,6%
Water618 grams20,6%
Polymer emulsion, AU 1265 VAC459 grams15,3%
Propylene glycol93 grams3,1%
STARPOL 13660 grams2,0%
48% solution of low molecular weight polymer, ALCOQUEST 408 polyacrylate30 grams1,6%
TCRR21 grams0,7%
Biocidal packing3 grams0,1%

The material was applied as a master on a vertically suspended foundations gypsum panels SHEETROCK brand® hawk and trowel and traditional methods of applying the two-layer protective plaster. This implementation had a more dense and sticky when applying performance and demanded grout with water. After hardening of the material, the surface was hard, smooth and possessed the properties of high resistance to abrasion.

EXAMPLE 2

Cover the mixture was obtained using the components listed in Table II. 45% solution ALCOQUEST 747, terkaly pyrophosphate, and biocidal/tuniziano packaging and protivovspenivayushchie tool FOAMBLAST®301s (Lubrizal Corp., Wickliffe, OH) was added to water and completely dissolved under stirring at rough is about 60 rpm Propylene glycol and HP 41-830 then added with stirring and stirred at 60 rpm for 1-2 minutnoe, hemihydrate of calcium sulfate were mixed in dry state with STARPOL 136 (2.0%) and synthetic smectite clay LAPONITE (Rockwood Additives Ltd., UK) for 5 minutes. Mixed in the dry state the sample was slowly added to the water component under stirring at 60 rpm or below. Stirring is continued at 80 rpm until the large pieces were no longer visually distinguishable.

TABLE II
ComponentWeightComposition
Hemihydrate calcium sulphate2464 gram61,6%
Water884 grams22,1%
Polymer emulsion, HP 41-830 the vinyl acetate332 grams8,3%
Propylene glycol124 grams3,1%
STARPOL 13680 grams2,0%
45% solution neskovic the polar polymer 64 grams1,6%
ALCOQUEST 747 polyacrylate
TCRR24 grams0,6%
LAPONITE®20 grams0,5%
FOAMBLAST®301s4 grams0,1%
Biocidal packing4 grams0,1%

The material was applied as a master on a vertically suspended the basis of gypsum panel SHEETROCK brand® hawk and trowel and traditional methods of applying the two-layer protective plaster. The material had a higher resistance to drainage of water during storage, however, the performance of the material has changed. After hardening of the material, the surface was smooth and had properties of resistance to abrasion, comparable with plaster.

EXAMPLE 3

Ready mixed plaster was received with the components listed in Table I. ALCOQUEST 408 polyacrylate polymer and tetradecylphosphonic connection (TCR) was added to water and completely dissolved by stirring at rough is about 60 rpm Hemihydrate of calcium sulfate were mixed in a dry state with a pre-gelatinizing starch STARPOL 136 for five minutes with the formation of a dry mix. The dry mixture was slowly added to the water component under stirring at about 60 rpm or less. Propylene glycol and HP 41-803 vinyl acetate latex emulsion was added to the composition under stirring at 60 rpm Stirring is continued until the large pieces were no longer visually distinguishable.

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TABLE III
ComponentWeightComposition
Hemihydrate calcium sulphate1500 grams61,6%
Propylene glycol75 grams3,1%
STARPOL 13610 grams0,4%
Polymer emulsion, HP 41-830 the vinyl acetate250 grams10,3%
48% solution of low molecular weight polymer, ALCOQUEST 408 polyacrylateof 18.6 grams0,8%
9 grams0,4%
Water571 grams23,4%

The material was applied as a master on a vertically suspended the basis of gypsum panel SHEETROCK brand® hawk and trowel and the traditional technique of applying a two-layer protective plaster. The material was much less sticky than the connecting material was more workable and was worn to smoothness, without overlaps and without sandblasting. These properties made the material much more perfect than the connecting materials, which are used when applying nacrylic. The material had no performance, exactly like the powder mixed plaster under the trowel, but was offered a good compromise between the characteristics of application and convenience. After hardening of the material, the surface was smooth, free from cracks and had properties of resistance to abrasion, comparable with plaster.

EXAMPLE 4

45% solution ALCOQUEST 747 (1,6%), terkaly pyrophosphate (0,4%), biocide/fungicide packaging (0,1%), and protivovspenivayushchie tool FOAMBLAST® 301s (0.6%) were added to water (20,2%) and completely dissolved with stirring at 60 rpm Propylene glycol (3.1%) and HP 19-176 (12.8%) are then added to the place with micronized wax Microspersion® 250-50 (I.E. Hilson Co., Wheaton, IL) (3,6%) at 60 rpm and was stirred for 1-2 minutes. Finally, hemihydrate calcium sulphate (56,6%) were mixed in dry state with STARPOL 136 (1,0%) for 5 minutes. Mixed in the dry state the sample was slowly added to the water component under stirring at 60 rpm or below. Stirring is continued at 80 rpm until the large pieces were no longer visually distinguishable.

While have shown and described a particular implementation of the composition legitirole plaster and fashion, specialists in the art will appreciated that such implementation can be changed and modified, without departing from scope of the present invention in its broader aspects as set forth in the formula of the present invention described in this application below.

1. The coated panel containing:
construction panel; and
the dried coating containing hemihydrate calcium sulphate latex polymeric matrix, with specified polymer matrix is essentially free of water and further comprises a two-component agent for preventing adhesion, distributed across the specified matrix, while
the first component of a two-component agent for preventing adhesion, contains low molecular weight polymer having a molecular weight comprising from about 2000 Da to approx the tion 6000 Yes, while specified polymer selected from the group consisting of polymers derived from monomers, such as vinylacetate, vinylacetate, vinylchloride, ethylene, styrene, substituted styrene, substituted ethylene, as well as polymers having polyamide frame or carboxylate functional group;
the second component of a two-component agent for preventing adhesion selected from the group consisting of tetrahydrofolate, tetramerista, amino-three(methylenephosphonic acid), trinitarios salt Diethylenetriamine-Penta(methylenephosphonic acid), hexamethylenediamine were-Tetra(methylenephosphonic acid) and mixtures thereof, and
crystals of the hemihydrate of calcium sulfate dispersed throughout the continuous polymer matrix.

2. The coated panel according to claim 1, characterized in that it further contains an additive that prevents deposition.

3. The coated panel of claim 2, in which the additive that prevents the deposition, contains one of the modified clay, silicate and mixtures thereof.

4. The coated panel of claim 1, in which the specified low-molecular-weight polymer obtained from monomers including vinylacetate, vinylacetate, vinylchloride, ethylene and substituted ethylene.

5. The coated panel according to claim 1, which further comprises emulsione polymer means of preventing cracks in outstays in amounts from about 0.1% to about 7%, based on the total weight of the composition.

6. The coated panel of claim 1, in which the second component is present in amounts from about 0.1% to approximately 2.0%, based on the total weight of the composition.

7. The coated panel of claim 1, in which the specified low molecular weight polymer is present in amounts from about 0.05% to approximately 2.0%, based on the total weight of the composition.

8. Facing mixture containing hemihydrate calcium sulphate containing:
latex emulsion polymer;
hemihydrate of calcium sulfate; and
two-component agent for preventing adhesion;
the first component of a two-component agent for preventing adhesion, contains low molecular weight polymer having a molecular weight comprising from about 2000 Da to about 6000 Da, with specified polymer selected from the group consisting of polymers derived from monomers, such as vinylacetate, vinylacetate, vinylchloride, ethylene, styrene, substituted styrene, substituted ethylene, as well as polymers having polyamide frame or carboxylate functional group;
the second component of a two-component agent to prevent sticking selected from the group consisting of tetrahydrofolate, tetramerista, amino-three(methylenephosphonic acid), trinitarios salt diety entrain-Penta(methylenephosphonic acid), hexamethylenediamine were-Tetra(methylenephosphonic acid) and mixtures thereof, and
water.

9. Lining mixture according to claim 8, which further comprises a organic remedy that is holding water.



 

Same patents:

FIELD: process engineering.

SUBSTANCE: invention relates to production of glued laminates. Proposed method consists in gluing together consecutive layer. Glue or adhesive is applied on first layer surface for, at least, one next layer to be glued thereon and coated by second surface layer. Pressure is applied to the latter and layers of glue or adhesive are dried unless their polymerisation. Mesh of web of fiber glass is applied on the first surface layer after application of glue or adhesive. Inner layer is composed of placing the ring- or cylinder-shape bamboo fragments on said web or mesh the fragments. Then, layer of glue or adhesive is applied thereon and covered by another mesh or wed of fiber glass for attachment of second surface layer.

EFFECT: higher efficiency.

4 cl, 7 dwg

FIELD: machine building.

SUBSTANCE: chassis is composed of 3D composite structure comprising bearing layers made up of thin-wall preforms to support reinforcing elements bound of binding compound. At least, one of said bearing layers is made bulky by forming stiffness ribs composed of bulged hemispheres regularly distributed over layer surface and connection two-layer stiffness ribs formed of preform sections not used in hemisphere formation. Remaining sections are used to make connection sites. Reinforcing elements represent twisted bundles of multi-fiber composite materials to be arranged between surfaces of stiffness elements. Rounded sections of bundles are located inside and around hemispheres to fill free space between stiffness elements with self-curing compound.

EFFECT: decreased weight and sizes, improved operating performances.

FIELD: construction.

SUBSTANCE: reinforced multi-layer technical profile comprises a bearing matrix in the form of a heat insulator and lining protective reinforcing coatings. The heat insulator is a monolithic diversely reinforced sectional multilayer matrix frame from a heterogeneous filler equipped with diverse layers of the insulant along the entire thickness of the technical profile. From the inside there is an isothermic lining insulant, and from the outside - a heat protective one. The technical profile is manufactured on the basis of the matrix frame by filling of multilayer sections of the heat insulator with the diversely reinforced heterogeneous filler along its entire thickness with heterogeneous layers of the insulant. Under steam and hydraulic insulation the isothermic internal and external heat protective lining insulants are arranged.

EFFECT: invention makes it possible to increase thermal and physical characteristics of erected structures, to reduce their specific weight and prime cost.

2 cl, 1 dwg

Building element // 2473755

FIELD: construction.

SUBSTANCE: building element comprises an inclined channel formed in the concrete body, which protrudes at least to one of elements faces, designed for fixing a lifting and an assembling accessory and formed by monolithing of an embedded part into the concrete body, besides, the channel is arranged with the thread on its working surface.

EFFECT: simplified design, higher safety and efficiency in assembly of buildings and structures, provides for considerable metal saving.

3 cl, 7 dwg

FIELD: construction.

SUBSTANCE: asbestos-cement product with a protective decorative coating comprises an asbestos-cement base with front and rear surfaces and a protective-decorative coating applied onto them. In order to increase operational characteristics and to reduce manufacturing cost, the protective-decorative coating is arranged on the front surface in the form of serially applied glue composition and decorative grit fill, and has thickness of 0.35-3.0 mm, besides, the maximum size of fill particles makes 0.25-1.0 of the coating thickness.

EFFECT: improved operational characteristics and reduced cost of applying a protective-decorative coating.

8 cl, 3 dwg

FIELD: construction.

SUBSTANCE: panel for additional heat insulation of walls comprises sheets forming face and rear planes of a panel, with an air layer between them and structurally grouped packets, with eight pieces each, rigidly joined to each other by rear and face surfaces and the ninth in the centre, which may move horizontally relative to a wall under action of a vibrator with a drive and a controller of displacement speed, and is also equipped with a temperature controller with a sensor of temperatures and arranged in the form of setting and comparing units, electronic and magnet amplifiers, a unit of non-linear feedback. Besides, the movement speed controller is arranged in the form of a unit of powder electromagnet couplings, at the same time on the rear plane of panel sheets structurally grouped with eight pieces each, there are curvilinear grooves with the opposite direction of motion of the tangent on each adjacent pair of panel sheets, at the same time on the first sheet of the panel pair the tangent of the curvilinear groove has a clockwise direction, and on the second sheet of this panel pair the tangent of the curvilinear groove moves counterclockwise.

EFFECT: maintenance of heat-insulation properties of a panel during long-term operation by elimination of moisture condensation process from atmospheric air available between rear and face surfaces of a panel, by means of turbulisation of a mode of its movement due to vibration horizontal displacement under effect of vibration of a face surface relative to a rear one, and also air flow swirling in an air layer due to swirls in curvilinear grooves on a rear side of panel surface.

4 dwg

FIELD: construction.

SUBSTANCE: metal composite panel includes two surface layers from metal and an inner polymer composite layer. The polymer composite layer represents a nanocomposite produced as a result of polymer modification by bentonite clays used as a clay powder of fraction less than 0.07 mm dried to residual moisture 0.07 mm dried to residual moisture of less than 2%, with supply of polymer into its melt in the amount of 5-20 vol %.

EFFECT: reduced cost of panel production with preservation of operational properties, in particular, high fire resistance.

1 dwg, 1 tbl

FIELD: construction.

SUBSTANCE: monocell structure comprises a frame, facade panels and internal wall panels. The frame is arranged in the form of a monocell with an upper volume in the form of a pyramid with faces of triangular shape, with a lower volume in the form of a polygon and with a central volume in the form of a hexahedral prism with upper and lower bases. Along perimetres of bases there are perforated banding rims are installed to fix vertical guides, onto which facade panels of volumes are suspended. Panels comprise sections, every of which has inbuilt fastening elements, an external decorative-protective facing cover and/or removable decorative-architectural elements and sealants. Volume panels are arranged in the form of sections with sealants and are fixed on elements of volume faces. Each section comprises a spacer stand with a spacer-fastening element and fastening universal joints, contains heat-sound-hydraulic insulation, has an external decorative-interior facing cover and/or removable decorative-interior elements, is equipped with a process assembly opening for local assembly and dismantling of sections, and also for installation of universal cartridges in them with special purpose, closed with a removable decorative panel.

EFFECT: expansion of structural realisation of a monocell structure, simplified process operations and assembly works and higher functionality.

9 cl, 10 dwg

FIELD: construction.

SUBSTANCE: slab building structure comprises a concrete body, inside which an assembled core and a reinforcement frame are arranged. The core is made of rows of vertical metal plates installed along the height of the concrete body section. Plates are assembled to each other into a grid structure from crosswise arranged rows. Plates have holes, where reinforcing elements of the reinforcement frame are installed. Plates are arranged with a protrusion arranged above the concrete body. Plate protrusions are rigidly fixed with adjacent upper metal sheet elements laid along the upper surface of the concrete body. In the place of their connection there are doubled reinforced belts. The core is made with the possibility to generate a horizontal row of additional metal sheet elements in the area of highest normal stresses of the concrete body. Additional sheet elements are rigidly connected with adjacent vertical plates to form additional doubled reinforcement belts in the place of their connection.

EFFECT: reduction of cost and higher reliability.

8 cl, 9 dwg

Building panel // 2455434

FIELD: construction.

SUBSTANCE: building panel, in which on a surface of a basic element there are the following components formed in the specified order: an impregnating coating film, a water-soluble coating film, a colourless coating film based on a dissolvent and an upper colourless coating film, besides, the water-soluble coating film is formed from a synthetic resin and a refractory reagent; the upper colourless coating film is formed from a resin hardened under exposure to ultraviolet radiation, and a refractory reagent; the volume of the refractory reagent in the water-soluble coating film is equal to 10 - 50% by weight relative to solid particles of the specified water-soluble coating film; the volume of the refractory reagent in the upper colourless coating film is equal to 5 - 20% by weight relative to solid particles of the specified upper colourless coating film; and the highest caloric power measured in accordance with ISO 5660 for 20 minutes using a conical calorimeter makes less than 8 MJ/m2.

EFFECT: higher refractory property and designability.

3 cl

FIELD: chemistry.

SUBSTANCE: invention relates to quick-drying aqueous coating compositions used for road marking, as well as to road marking. The composition contains one or more anion-stabilised binding substances containing a polymer component with phosphoric acid functional groups. The polymer component has glass transition point (Tg) in the range of -30 to 60°C. The binder contains a polyfunctional amine component. The binding substance is contained in the composition in combination with one or more volatile bases. The volatile base is contained in an amount sufficient for stabilising the composition with at least partial deprotonation of the polyfunctional amine, and one or more phosphoric acid surfactants, such as alkyl ethoxylated phosphate. The invention also relates to double-component compositions containing said composition as one component and a second component containing an absorbent and/or a polyfunctional amine component.

EFFECT: quick drying compositions exhibit stable viscosity and provide wear-resistance of quick-drying coatings even in moist application conditions.

10 cl, 4 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: invention relates fire-retardant intumescent compositions used to reduce flammability and improve fire-resistance of materials and structures. The method producing a fire-retardant intumescent composition based on polymer binder, ammonium phosphate, pentaerythritol, melamine and target additives for stabilisation and decoration involves further addition to the composition of 3.0-7.0 wt % organosilicon polymers having backbone chains consisting of alternating silicon and oxygen atoms and 0.02-0.07 wt % C60 fullerene.

EFFECT: obtaining a coating having different strength properties: retention of adhesion to the protected surface at high temperatures, elasticity of the formed coked cellular material.

36 ex

FIELD: chemistry.

SUBSTANCE: dispersant is a copolymer of (meth)acrylic acid with an alkyl oxide monomer, having a polymerisable functional group and terminated by a hydrogen atom or an alkyl group having 1-4 carbon atoms. The thickener is an associative thickener containing at least one hydrophobic group which is a polystyrylphenyl, preferably selected from distyrylphenyl, tristyrylphenyl and mixtures thereof. More preferably, the hydrophobic group is tristyrylphenyl.

EFFECT: dispersant-thickener combination enables to enhance gloss retention of a paint film over time, while providing the aqueous composition with the required rheological properties.

28 cl, 2 tbl, 18 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing a latex paint composition containing biocides. The method of producing a paint composition involves preparation of a ground phase by mixing one or more pigments, other components of the ground phase and a biocide which is insoluble in water and mixing the ground phase with one or more latex resins and other liquefying components, where the biocide which is insoluble in water is a composition with high content of solid particles which preferably contains at least 50 wt % biocide. Components of the ground phase are selected from one or more components such as: cosolvents, coalescence agents, thickeners, surfactants, pigment dispersers, neutralising substances and antifoaming agents. Liquefying components are selected from one or more components such as: latex resins, pigment suspensions, coalescence agents, thickeners, neutralising substances and antifoaming agents. The water-insoluble biocide is particularly 1,2-benzisothiazol-3(2H)-one and is a composition with high content of solid particles which preferably contains at least 80 wt % biocide. The invention also relates to a ground phase for use in the method of producing latex paint which contains one or more pigments, ground phase components and a biocide which is insoluble in water, said biocide being a composition with high content of solid particles which preferably contains at least 50 wt % biocide. Components of the ground phase are selected from one or more components such as: water, cosolvents, coalescence agents, thickeners, surfactants, pigment dispersers, neutralising substances and antifoaming agents.

EFFECT: method enables to include a biocide in a form which does not contain volatile organic compounds.

11 cl, 3 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to an electrodeposited coating composition which can be deposited on an electroconductive substrate by anodic electrodeposition, substrates coated by such a coating composition and a method of coating a substrate. The electrodeposited coating composition is an aqueous dispersion containing at least a partially neutralised copolymer which contains an α-olefin and an unsaturated carboxylic acid, and a curing agent in form of a metal peroxide. After applying the electrodeposited coating composition by immersing the substrate into said composition, the deposited layer is heated in order to cure the coating and form a cross-linked mesh which provides a durable coating which is resistant to spalling and corrosion.

EFFECT: providing a durable coating which is resistant to spalling and corrosion.

21 cl, 2 tbl

FIELD: construction.

SUBSTANCE: heat insulation coating represents a mixture of metallised and non-metallised ceramic microspheres, as a binding substance of which a mixture is used containing styrene-acrylic latex (5.0-10 wt %), sodium liquid glass (1.0-3.0 wt %) and low-molecular silicon rubber (4.0-6.0 wt %). Metallisation of ceramic microspheres is arranged from a soft magnetic iron metal, with thickness of 800-900 angstrom. In process of coating application, microspheres are exposed to magnetic power lines, for creation of which on the reverse side of the surface of the item of complex configuration, in respect to the side, onto which a coating is applied, there is a steel core, an induction winding, wires to supply current and voltage.

EFFECT: higher efficiency and productivity of heat insulation works.

1 dwg

FIELD: chemistry.

SUBSTANCE: invention can be used to produce artificial film-type electroconductive coatings (resists) for making radar-absorbent filler. The electroconductive paint for radar-absorbent filler contains polyvinyl acetate binder, colloidal graphite, water and OP-10 emulsifying agent.

EFFECT: invention enables to obtain and control resistivity of a current-conducting coating in the range of 150-800 ohm·cm.

2 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: aqueous coating composition contains at least one water-soluble film-forming polymer selected from polyurethanes, polyesters, polycarbonates and polymers obtained by polymerising olefinically unsaturated monomers and additionally contains solid particles of an amine resin based polymer. The coating is formed on a substrate by applying the aqueous composition to obtain a peelable temporary coating.

EFFECT: solid particles of an amine resin based polymer used in the aqueous composition improve peeling capacity of the temporary coating layer.

11 cl, 1 tbl, 3 ex

FIELD: transport, package.

SUBSTANCE: group of inventions relates to containers for food products and beverages and methods for applying coating on them. Containers for food products and beverages include metal substrate which has at least partially applied covering composite including water-dispersible system of resin and water carrier. Resin system includes epoxy component and acrylic component. Then composite is hardened and formed on metal substrate of hardened covering. In the preferable version of implementation, covering composite is at least minimally suitable for autoclaving in hardened condition.

EFFECT: elimination of covering corrosion, water absorption by covering and/or loss of adhesion to base substrate, as well as excluding influence of aggressive chemical properties of food product or beverage on the covering on water basis.

15 cl, 4 tbl, 14 ex

FIELD: chemistry.

SUBSTANCE: universal thick-layer anticorrosion paint system includes an aqueous aryl-containing dispersion with a crosslinking agent, target additives, an instant corrosion inhibitor, a water-soluble organic corrosion inhibitor, an anticorrosion pigment and other pigments, nanodispersed silicon dioxide, plate-like and active filler and water. Corrosion inhibitors and the anticorrosion pigment are capable of forming nanosized protective layers on a metal surface under a paint film. The nanodispersed silicon oxide provides thick-layered application of the paint coat. In order to seal the paint coat structure and increase enhance its water-repellent properties, nanodispersed fluoroplastic is additionally used in the paint system.

EFFECT: longevity of the paint coat, increase in cost effectiveness of paint and repair works owing to fewer layers and increase in thickness of the coating, increase in inter-repair period of metal structures to 28 years.

1 tbl, 10 ex

FIELD: process engineering.

SUBSTANCE: invention relates to thin-film glass-ceramic coatings used in science of materials and medicine. Proposed method comprises preparing film-forming solution, applying first layer of said solution of silicon substrate, second said layer and, once more, said first layer. Every said layer applied, stepwise thermal treatment is performed at 60°C for 30 min and, then, stabilisation annealing is performed at 700°C for 1 h. Composition of said first film-forming solution includes zirconium oxochloride and 96 wt % of ethyl alcohol. Composition of second film-forming solution includes tetra ethoxysilane, calcium chloride, orthophosphoric acid and 96 wt % of ethyl alcohol.

EFFECT: stable coat with high refractive index and thickness over 100 nm.

3 cl, 3 ex

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