Coated building panels and articles containing calcium sulphate hemihydrate

FIELD: chemistry.

SUBSTANCE: invention relates to finishing interior wall surfaces. The method of finishing an interior wall involves preparing a base for building panels containing gypsum, cement or combinations thereof; applying a coating mixture on the surface of the base, said mixture containing 10-40 wt % latex emulsion binder, 30-80 wt % calcium sulphate hemihydrate, 0.1-2 wt % set inhibiting agent, 0.05-2 % of a polymer having molecular weight less than 6000 Da, said polymer being selected from a group consisting of polymers obtained from monomers such as vinyl acrylates, vinyl acetates, vinyl chlorides, ethylene styrenes, substituted ethylenes, as well as polymers having a polyamide skeleton or carboxylate functional groups, and 10-40 wt % water. The invention also relates to a building panel with said coating.

EFFECT: use of the coating mixture enables to cut the duration of the process of finishing walls, and enables use thereof to make novel building panels and for recoating old walls in need of repair.

10 cl, 3 tbl, 3 ex

 

The level of technology

The present invention relates to the composition of the hemihydrate of calcium sulfate and the method of its application. Additionally, it refers to the universal priming tool, which can be applied on new or previously painted plaster panels, cement panels or the like to prepare surfaces for plastering, painting or other decorative surface finish.

Interior walls are typically made of plaster panels, such as gypsum panels SHEETROCK brand®, cement panels or the like, while the use of the panels allows the rapid creation of large surfaces of walls, joints between panels must be trimmed to obtain a monolithic surface, which is ready to receive paint or other decorative finishes. Whether constructed new walls or re-covered old walls require a large amount of time to prepare the walls for painting, plastering or other decorative finishes.

Finish the new panel is a time-consuming process. After the plate is suspended, the coating of the connecting material is applied to the seams and nail heads. Connecting material left to be dried overnight, then when it dries completely, it is subjected to sanding. Dust the settlement of the e sandblasting removed with abrasive material or a damp sponge. If connecting material shrinks, put the second layer of connecting material and left to be dried overnight followed sandblasted and dust surfaces. For qualitative work, the process is repeated with the third layer of connecting material. The surface finish takes at least three days, even after the plate is suspended. This method can also be used to repair damaged walls.

Although this method takes time, the result is an inexpensive smooth monolithic surface. This is a relatively simple way, and it can often be performed by landlord without professional help. However, there are disadvantages in terms of the amount of time required to complete such work. In the new design, 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. Faster and cleaner with the royals re-finishing old walls may be desirable as contractors, and homeowners.

Instead of such a long process, some homeowners choose a protective plaster covering on the wall. After plastering on all seams, fasteners and other defects, the wall is covered with plaster qualified technician. This method 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. In addition, to make smooth the plaster defects do not require sandblasting, due to the stage of thickening, irrespective of the method of applying plaster. Because he should not use sandblasting, the landlord is free from the mess and waste of time that is required to remove dust that may be caused by the use of connecting material. Finally, a protective plaster can be completed in one day, compared with two to three days to work with the connective material. Thus, the work completed faster. The use of painted plaster may even eliminate the need for painting the plastered surface. The disadvantage of this method is that the protective plaster should be applied to qualified brig the DOI, that increases the cost. It will be very difficult for the typical homeowner to put a protective plaster coating with good results.

Available wall plate designed for use with plaster, for example, gypsum brand IMPERIAL® from United States Gypsum Co., Chicago, IL. This wall plate has properties that ensure the integrity of the plaster and contains additives in the paper, allowing you to maintain strength even after absorbing water from the layer of plaster. However, such special construction panels may not be available everywhere, or landlord may elect to apply a plaster finish after installation of traditional building panels. In such cases, it is useful to have available a coating or priming tool, which will allow the application of protective plaster covering on traditional construction panel.

Re-cover your old, damaged walls also requires several stages. New plaster, for example, can not be applied directly over the old plaster, because you will not adhesion. The surface of the sand, for example, by sandblasting, leaving unprotected absorptive surface or extremely damaged parts that may be subject to removal. Then put a binder for binding together layers of pieces of the Turks. Then put the main floor plaster, and then applying a thin layer of plaster. After drying, put a finishing layer of plaster. At least three layers of material is applied before applying the final finishing layer of plaster. Re-covering old plaster will be more easy if you have a priming tool, which will reduce the number of layers of plaster and the amount of material that must be applied during the reconstruction. Additionally, some homeowners would like to have the opportunity to paint the old wall, which was pre-applied plaster, or apply plaster to the old walls, which were painted. This requires a priming tool, which will have the adhesion to the paint and plaster. In the prior art has not considered the priming means having the ability to bind plaster and other finishes walls. In U.S. patent No. 4,661,161 were obtained ready mixed, grasp 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 init IAT Ives the RA 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.

Therefore, in this technical field, there is a need in the composition, such as a priming tool, which links a number of different surfaces and can be used for a number of different application.

The invention

These and other problems are solved by using the present invention, which is a multifunctional primer tool, allowing the adhesion of paint or plaster to traditional construction panels, regardless of whether the new panel, painted, pre-pasted Wallpaper or plaster. More specifically, at least one implementation is a method of preparation of the internal wall finishing coating, for example, plaster, paint or other decorative compositions. The method includes the stage at which prepare the basis for the construction of panels containing gypsum, cement, or combinations thereof, with the specified base has a surface, and apply the coating to the substrate, but such coverage contains 1-30% by weight of a latex emulsion binder, 30-80% by weight of the hemihydrate of calcium sulfate, up to about 8% by weight of the inhibitor is setting and 20-60% by weight of water.

The coating in accordance with the present invention is a ready-mixed composition for application to a building panel that can act as a multi-priming funds. It can be used for training or new structural panels or to re-cover old walls in need of repair. The song priming tool is useful if the wall is prepared to receive paint, plaster or any other decorative compositions.

Finish the wall by applying a protective plaster covering is faster than the sealing tape application connecting material and sandblasting that require waiting up to 24 hours between each coat so that the connecting material sufficiently dries to overcoating. When applying this composition, may be applied to the protective plaster, and then applying a second coating on the same day. At least one, and often two days can be saved using this method.

The use of a composition priming means in accordance with the present invention opens a number of opportunities that previously required the removal of dry wall or other building panels, which are already m the CTE. A protective plaster can be now applied to the new walls, which were established traditional construction panels or where there are no special panel for use with plaster. When the reconstruction work, where traditional panels were pre-painted or papered, may be applied to the plaster by using the primer composition means in accordance with the present invention.

The use of this cover mix also saves materials, especially when applying a new protective coating of plaster on the wall with pre-applied plaster. Fewer layers of plaster and material required to cover the walls of the protective coating, in comparison with traditional ways of re-finishing the surface with pre-applied plaster. At least one coating of plaster is less than required to obtain a finished quality monolithic surface.

Detailed description of the invention

The base is made from panels containing gypsum, cement, or combinations thereof. For the purposes of the present invention, the manufacturing bases includes any method of manufacturing bases, ready to receive the coating obtained from a mixture covering. In the new design, manufacture bases includes attaching the panels to the studs is whether another frame, used to support the walls and/or ceiling.

Panels contain a frame with an optional cladding on one or both major surfaces. Preferably, the panels are manufactured from plaster such as gypsum panels SHEETROCK brand® from United States Gypsum Co. 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". Gypsum slurry is spread over the entire width of the sandwich and is formed to a constant thickness, and then leave to seize and harden. If the suspension gidratirovana by approximately 50%, the panels are cut to the appropriate length and move in the kiln for the final drying. Particularly preferred gypsum building panel for use with plaster is a gypsum panel IMPERIAL® from United States Gypsum Co. (Chicago, IL).

Hemihydrate of calcium sulfate can be of any type or mixtures of various types. 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 calcinaro the config gypsum has a more amorphous or lamellar crystal morphology compared to the alpha form. Because the alpha form is less amorphous, it has better fluidity when the dispersion 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 lining is made from any material which has adhesion cover the mixture, and which ensures durability of the panel. Acceptable cladding include paper, cardboard, fiberglass, plastic, canvas or mesh lining, or any facing, known from the prior art. Also considered is the use of panels that have no lining.

The surface of the base is made by attaching the 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 the connection between the panels are so small as practically possible. Connection then stick tape after forming the monolithic surface. 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 should be equal to the surface.

Surface preparation also includes the stage of finishing pre-decorated surface for repair. The exact type of preparation depends on the nature of repair. When replacing all or part of one or more panels, the training includes the addition of new panels or parts.

Cover the mixture, forming a coating that contains a latex emulsion polymer as a binder. Some implementation covering the mixture, the 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 if the overlying mixture is applied on gypsum Board, but can the be also applied to other bases. The exact type and quantity of latex emulsion polymer, which is added depends on the surface on which it is applied. Large quantities of adhesive means are more appropriate for use on less porous bases.

Preferably, a latex emulsion polymer has a molecular weight of more than 10,000 daltons. In some implementations, the number of latex emulsions are in the range of from about 1% to about 30%, or from about 10% to about 40% by weight, based on the weight of all the components of the mixture. Examples of acceptable latex emulsions include AIRFLEX® 4530 vinyl acetate copolymer emulsion, AU 1265 polyvinyl acetate homopolymer emulsion, HP 19-176 polyvinyl acetate copolymer emulsion and HP 41-830 vinyl acetate emulsion, available from Halltech Inc. (Ontario, Canada), VF-812 methacrylate latex polymer available from Engineered Polymer Solutions, Marengo, IL.

Another component covering the mix is the hemihydrate of calcium sulfate. Any type hemihydrate of calcium sulfate is useful in covering this mixture, as described in the application above with respect to construction panels. If covering 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 panel, and it may be of another type. Many implementation covering a mixture of beta-calcined hemihydrate of calcium sulfate.

Inhibitor setting add to the covering of the mixture to prevent hydration and setting of the hemihydrate of calcium sulfate. Addition of an inhibitor setting allows you to get covering the mixture in the form of ready-mixed product, eliminating the need to add water and/or additional chemicals on the jobsite. Can be applied any inhibitor setting, known for unlimited easing setting hemihydrate of calcium sulfate during the shelf life of the product. The total number of inhibitor setting up to 8% by weight. The amount of inhibitor setting, comprising from about 0.05% to about 2%, are also useful.

At least some implementation covering the mixture, the combination of low molecular weight polymers and small molecules as two-component inhibitor setting. Both parts of a two-component inhibitor setting 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 packaged stockturn the th product 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 daltons to about 6000 daltons. Some implementation of low-molecular-weight polymer obtained from monomers including vinylacetate, vinylacetate, vinylchloride, ethylene, styrene, substituted styrene and substituted ethylene. 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 total mass of the mixture covering. ALCOQUEST® 408 and ALCOQUEST® 747 (Alco Chemical, Chattanooga, TN) are liquid solutions and modified polyacrylate polycarboxylate polymers, respectively, having a molecular weight, which is approximately 3000. Such polymers are particularly well suited for use in compositions covering the mixture.

Small molecules that are part of the preferred inhibitor, grasp, have any number of small molecules. Some small molecules that are useful include polyphosphonate compounds, including, but not limited Chivas given, tetrahydrofolate, tetrakaidecahedral, aminotri(methylenephosphonic acid), chinatravel salt Diethylenetriamine Penta(methylenephosphonic acid), hexamethylenediaminetetra(methylenephosphonic acid), tetrakaidecahedral and mixtures thereof. The number of small molecules, which are used in the covering of the mixture, up to about 8% or from about 0.1% to about 2%, based on the total weight of the components. Example of an acceptable small molecules is of terkaly pyrophosphate (Astaris, Cateret, NJ).

Water is optionally added to the mixture at the job site. The exact quantity of water added depends on the desired thickness of the coating. It is possible to obtain cover the mixture with the consistency of a paste or paint. It is preferable that the water was added in the amount of at least 20% by weight of components. For less dense compositions, up to 70% by weight of the components may be added in the form of water. The water should be as clean as practically possible, to reduce the possibility of unwanted chemical reactions, biological damage or destabilization of the mixture.

Optional add biocide to prevent the growth of mold and bacteria count of the composition during its shelf life. The amount of biocide will partly depend on the specific selected is Izida, however, some biocides are present in quantities of from 0.08% to about 0.5% by weight, based on the total mass of the mixture covering. Acceptable biocides include sodium OMADINE® or zinc OMADINE®manufactured by Arch Chemicals, Inc. Norwalk, CT, or received in accordance with the method described in U.S. patent No. 3,159,640, which is included in this application by reference.

To increase the time of the open shutter and stability during repeated freeze, add glycol component. Glycol component comprises propylene glycol, ethylene glycol, polyethylene glycol and methoxypolyethyleneglycol, and mixtures thereof. Glycol component is used in amounts from about 1 to about 10% based on the total mass of the mixture covering. Molecular weight glycol component preferably is between 250 and 4000 daltons.

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.

Organic means, retaining water, reduces water separation and discharge during the shelf life of the product. It also retains moisture during application of the product, giving more than the a long time an open shutter and more glide. This mixture can be applied to any facility that holds water, is known for use with plaster or cement slurries. Some implementation mixture include starch or polyacrylamide as a means of retaining water. The number of funds that hold water, include from about 1% to about 10%, based on the total mass of the mixture covering.

Another optional component of the mixture represents additive against deposition. Used from about 0.05% to about 1% by weight of the additive based on the total mass covering the mixture. Additive versus deposition reduces the drain, and the deposition of solids. Preferred additives against deposition include modified clays such as modified smectite clay, silicates, for example, modified aqueous sodium lithium magnesium silicates, and mixtures thereof.

The optional thickeners added to cover the mixture for control of fluid rheology of the material. The optional thickeners added in quantities of from 0.05% to 8% by weight of the primer composition tools. Thickeners modify the rheology covering composition to facilitate application or increase coverage. Examples of thickeners include modified cellulose, for example, products BERMOCOLL® (Akzo Nobel, Stenungsund, Sweden) and guide acetylcellulose products CELLOSIZE® (Dow Chemical, Midland, MI).

Optional, lightweight structural materials, such as sand, calcium carbonate, expanded perlite, the dihydrate of calcium sulfate, synthetic ceramic spheres, synthetic spheres of silicate-based and cellulosic fibers added to the composition for cleaning the surface with providing better mechanical adhesion of plaster to the priming tool, as well as providing properties to absorb a certain quantity of water for plastering. The number of lightweight structural material, which is used in the mixture is in the range of 1-20%, based on the total weight of the components. The average particle diameter preferably is between 30 and 160 mesh.

Getting covering the mixture includes an Assembly of dry components and their mixing with the formation of a homogeneous dry mixture. The component Assembly includes the accumulation of hemihydrate calcium sulphate and lightweight structural component in the form of dry ingredients and mixing them in a dry condition to obtaining composite dry mixture. Optional modified sectiona clay or Filo layered silicate clay is also included in the dry mixture. The dry ingredients, add to dry mixture is not in a particular order. Can be applied with any method of dry mixing the dry mixture, including mixing, blending or) what s in the bowl of dry ingredients. In all cases, the mixing continued until a homogeneous dry mixture.

The liquid mixture obtained by dissolving two-part inhibitor setting in the water. Thus, low molecular weight polymer, small molecule, and an optional biocide may be added to the water and completely dissolved. The dry mixture is added slowly to the aqueous component under stirring. Finally, the glycol component and a latex emulsion polymer is added under stirring. In some implementations, the material is mixed at 60 rpm./minutes, until large pieces are more visually not distinguishable, usually 15-20 minutes.

Other implementation covering of the mixture include a biocide for long shelf life. 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 under stirring at about 60 rpm./minutes Glycol component (1-10%) and latex emulsion (5-30%) were then added under stirring at 60 rpm./minutes 1-2 minutes. Finally, hemihydrate calcium sulphate (30-80%) are mixed in a dry state with an optional lightweight structural material (1-20%) or modified smectite clay or Filo layered silicate clay (0.05 to 1%) for 5 minutes with the formation of a dry mix. Mixed the dry state to charge slowly added to aqueous component under stirring at 60 rpm./minutes or below. Cover the mixture was mixed at 60 rpm./minutes, until large pieces are more visually not distinguishable, usually 15-20 minutes.

Another implementation covering a mixture obtained 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./minutes of the Hemihydrate of calcium sulfate (30-80%) are mixed in a dry state with a low molecular weight polyacrylate-containing polymer (0,05-2,0%), and optionally, any combination of the modified smectite clay or Filo 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./minutes or less. Finally, the glycol component (1-10%) and latex emulsion (5-30%) are added under stirring at 60 rpm./minutes the Material is mixed at 60 rpm./minutes, until large pieces are more visually not distinguishable, usually 15-20 minutes.

Cover the mixture is applied by any known method of applying a coating of a given viscosity. In some implementations, covering the mixture is applied like paint, where the mixture is sprayed, put rollers or brush on the surface of the base. It is also considered that slightly more dense composition can be obtained, and that covering the mixture can be applied using the Falcon and the craftsmanship and attention to detail is ka or spatula and grain scoop. If covering the mixture is applied in a manufacturing environment, for example, covering the mixture is applied to the panel basics before sending retailer considered that can be applied to large-scale commercial equipment. Such equipment includes, but is not limited to the above, sprayers, rollers for coating, a blade device for coating, knife device for coating, etc. Covering the mixture may be applied by spraying, using the device or applied manually roller for grinding ink on lined paper plaster plate and/or painted dry wall.

After drying the primer means, optionally applying one - or two-layer protective plaster system or traditional plaster. Data Eicometer indicate that when applying the plaster on panel framework is not designed for plastering, for example, gypsum panels SHEETROCK brand®, there is a significant standard deviation (6, 8), which indicates the presence of uneven adhesion of plaster, which can lead to premature damage to the plaster. Additionally, the data indicate that the plaster, which is applied on the painted gypsum panels SHEETROCK brand®, the panel coated, has a relatively low standard discard is the (3,3) and relatively high average data Eicometer, components 16.

In a preferred implementation, the mixture is applied to a thickness of from approximately 5 to approximately 20 "mil wet" (approximately 0.005 to approximately 0.020 inch). It is much thinner than the protective layer of plaster or layer of connective materials, but much thicker than coloring priming tool, the thickness of which is approximately 3-4 "mil wet" (0.003 to 0.004 inches).

Example 1

Cover the mixture for re-coating was obtained with the components and amounts shown in Table I. Getting started by first dissolving two-part inhibitor setting in the water. ALCOQUEST® 408 polyacrylate polymer, the connection of terkaly polyphosphonates acid and biocide/fungicide packaging was added to water and completely dissolved with stirring at 60 rpm./minutes Slowly added hemihydrate of calcium sulfate to the aqueous component under stirring at 60 rpm./minutes or less. Finally, propylene glycol and HP 41-803 latex emulsion was added with stirring at 60 rpm./minutes the Material was mixed at 60 rpm./minutes, until the large pieces were no longer visually distinguishable, approximately 15-20 minutes.

Table I
The song re-coating
ComponentWeightTrack
Hemihydrate calcium sulphate1300 grams53,4%
Water600 g24,7%
Polymer emulsion: HP 41-803 the vinyl acetate400 grams16,5%
The agent keeps from freezing, ethylene glycol49 grams2,0%
Glycol component, propylene glycol50 grams2,1%
ALCOQUEST® 408 polyacrylate solutionof 18.6 grams0,8%
Inhibitor setting, TCRR9 grams0,4%
Biocidal packing2.3 grams0,1%

Example II

Structuring covering the mixture received from the components listed in Table II. In this case, was added to the sand as structural material. Getting started put the m first dissolving two-part inhibitor setting in the water. ALCOQUEST® 408 polyacrylate polymer, the connection of terkaly polyphosphonates acid and biocide/fungicide packaging was added to water and completely dissolved with stirring at 60 rpm./minutes of the Hemihydrate of calcium sulfate were mixed in a dry condition with light structural material for 5 minutes with the formation of a dry mix. The dry mixture was slowly added to the water component under stirring at 60 rpm./minutes or less. Finally, propylene glycol and HP 41-803 latex emulsion was added with stirring at 60 rpm./minutes the Material was mixed at 60 rpm./minutes, until the large pieces were no longer visually distinguishable, approximately 15-20 minutes.

Table II
ComponentWeightTrack
Hemihydrate calcium sulphate1400 grams57,4%
Water500 grams20,5%
HP 19-176 polyvinyl acetate copolymer emulsion300 grams12,3%
Medium-grained sand102 grams 4,2%
The agent keeps from freezing, ethylene glycol49 grams2,0%
Glycol component, propylene glycol50 grams2,1%
ALCOQUEST® 408 polyacrylate solution23.4 grams1,0%
Inhibitor setting, TCRR9 grams0,4%
Biocidal packing2.3 grams0,1%

This composition was applied onto gypsum panels SHEETROCK brand® and the surface was applied a two-layer protective plaster floor. Such structuring implementation enables easy application of plaster.

Example III

Cover the mixture was obtained using the components listed in Table III. This covers the mixture contained a modified cellulosic thickener in addition to the structural component of the expanded perlite. Adding a small amount of modified cellulose thickener allowed a significant reduction of the hemihydrate of calcium sulfate. Getting started p is the first dissolving the thickener in water with strong stirring followed by the addition of two-component inhibitor setting. ALCOQUEST® 408 polyacrylate polymer, the connection of terkaly polyphosphonates acid and biocide/fungicide packaging was added to water and completely dissolved with stirring at 60 rpm./minutes of the Hemihydrate of calcium sulfate were mixed in a dry condition with light structural material for 5 minutes with the formation of a dry mix. The dry mixture was slowly added to the water component under stirring at 60 rpm./minutes or less. Finally, propylene glycol and HP 41-803 latex emulsion was added with stirring at 60 rpm./minutes Covering the mixture was mixed at 60 rpm./minutes, until the large pieces were no longer visually distinguishable, approximately 15-20 minutes.

Table III
ComponentWeightTrack
Hemihydrate calcium sulphate1200 grams47,4%
Water600 g23,7%
HP 19-176 polyvinyl acetate copolymer emulsion500 grams19,7%
Medium-grained expanded perlite 102 grams4,0%
The agent keeps from freezing, ethylene glycol50 grams2,0%
Glycol component, propylene glycol49 grams1,9%
ALCOQUEST® 408 polyacrylate solution18.6 grams0,7%
Inhibitor setting, TCRR9 grams0,4%
BERMOCOLL® E 451 FQ3.2 grams0,1%
Biocidal packing2.3 grams0,1%

This material was applied onto gypsum panels SHEETROCK brand® and provide better coverage than other songs covering mixtures. Expanded perlite in the composition enables easy application of plaster.

At that time, as has been shown and described a particular implementation of the panel with coated or products made of hemihydrate calcium sulphate, specialists in the art will appreciated that changes and modifications can be made without going over the amount this is the first invention in its broader aspects, as set forth in the following claims.

1. The way of finishing the inner walls, including the stage at which:
prepare the base panels containing gypsum, cement, or combinations thereof, with the specified base has a surface;
apply the coating to the substrate, but such coverage contains 10-40% by weight of a latex emulsion binder, 30-80% by weight of hemihydrate calcium sulphate, 0.1 to 2% by weight of the inhibitor setting of 0.05-2% of the polymer having a molecular weight of less than 6000 Yes, with specified polymer selected from the group consisting of polymers derived from monomers, such as vinylacetate, vinylacetate, vinylchloride, ethylene styrene, substituted ethylene, as well as polymers having polyamide frame or carboxylate functional groups, and 10-40% by weight of water.

2. The method according to claim 1, which additionally adds the agent, preventing the deposition.

3. The method according to claim 1, which additionally add a organic remedy that is holding water.

4. The method according to claim 1, which additionally choose inhibitor setting from the group consisting of tetrahydrofolate, tetramerista, aminotri(methylenephosphonic acid), trinitarios salt of diethylenetriaminepenta(methylenephosphonic acid), hexamethylenediaminetetra(methylenephosphonic acid) and the x mixtures.

5. The panel coated, containing:
construction panel containing one of the group consisting of gypsum panels, cement panels, panels, containing gypsum and cement, and mixtures thereof; and
the coating obtained from the covering mixture containing 10-40% by weight of a latex emulsion binder, 30-80% by weight of hemihydrate calcium sulphate, 0.1 to 2% by weight of the inhibitor setting of 0.05-2% of the polymer having a molecular weight of less than 6000 Yes, with specified polymer selected from the group consisting of polymers derived from monomers, such as vinylacetate, vinylacetate, vinylchloride, ethylene styrene, substituted ethylene, as well as polymers having polyamide frame or carboxylate functional groups, and 10-40% by weight of water.

6. The panel with the coating according to claim 5, in which the specified connection inhibitor setting is one of the group consisting of tetrahydrofolate, tetramerista, aminotri(methylenephosphonic acid), trinitarios salt of diethylenetriaminepenta(methylenephosphonic acid), hexamethylenediaminetetra(methylenephosphonic acid) and mixtures thereof.

7. The panel with the coating according to claim 5, which additionally contains an additive against deposition.

8. The panel with the coating according to claim 7, in which the additive that prevents the deposition, contains one of the modified CH is t, silicate and mixtures thereof.

9. The panel with the coating of claim 8, in which the modified clay is one of the modified smectite clay, modified aqueous sodium lithium magnesium silicate and mixtures thereof.

10. The panel with the coating according to claim 5, which further comprises a texturing material.



 

Same patents:

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.

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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.

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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

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

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: 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

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