Antimicrobial sizing emulsion and gypsum board obtained with its application

FIELD: textiles, paper.

SUBSTANCE: invention relates to an emulsion of the agent for paper internal sizing and a biocide emulsifier, such as cationic starch-free quaternary ammonium compounds, which is added into the paper pulp for obtaining antimicrobial paper. The antimicrobial paper is suitable facing material for gypsum boards. The biocidal sizing emulsion comprises the agent for internal sizing and a biocide emulsifier, at that the agent for internal sizing and a biocidal emulsifier are emulsified in water, at that the biocide emulsifier is a starch-free quaternary ammonium compound.

EFFECT: improving the antimicrobial characteristics of the paper.

8 cl, 5 tbl

 

RELATED APPLICATION

The present application claims priority under section 119(e) of section 35 of the U. S. on the basis of the provisional application for U.S. patent No. 61/428080, filed December 29, 2010.

AREA of TECHNOLOGY

The invention relates to emulsions containing alchemistry anhydride ("AAA") used for the sizing of paper, or alkylbetaine dimer ("AKD"), used for the sizing of paper, and a biocide, where the biocide has a dual function and acts as a biocide and an emulsifier.

AREA of TECHNOLOGY

Gypsum Board, also known as gypsum Board, plasterboard, wallboard, are popular building materials with desirable properties for use inside of premises. They have a long life, an economical and fire resistant. In addition, these plates have excellent compressive strength and relatively low density. They are easy to decorate, for this reason their use as surfaces for interior decoration is attractive.

Producing gypsum boards includes obtaining a slurry of hemihydrate calcium sulphate, water and additives and continuous coating of the slurry onto a conveyor belt or on the molding table. Often the paper sheet coating, also called veneers�full-time material move on the conveyor belt behind the mixer, for continuous deposition of the slurry on the cladding layer. Often the second paper sheet, the coating or lining material is applied over the slurry. The obtained structure is formed in the panel. The hemihydrate of calcium sulfate reacts with water in suspension, resulting in the conversion of the hemihydrate into a matrix of linked crystals of the dihydrate of calcium sulfate, which causes the hardening and solidification of the slurry. As a result of this process forms a continuous ribbon of solidified material may not contain a cover sheet that contains the cover sheet on the front and back side of the panel or only one the cover sheet on the front or on the rear side of the panel. A continuous ribbon is transported through the pipeline to the setting of the calcined gypsum, sufficient to enable the plaster to be able to withstand the processing and movement from the conveyor to another location, such as a drying oven, after which the tape is cut with the receiving plates of the desired length. Excess amounts of water required for the hydration of the calcined gypsum is removed from the gypsum Board in a drying oven.

Manufacturers of gypsum panels often use a biocide to protect the panels from microorganisms, such as mold or fungi, by processing the paper�x coatings. However, the treatment is exclusively paper to combat the growth of mould is often inadequate for a number of reasons. Many biocides lose efficiency when drying in the oven as a result of exposure to high temperatures. The effectiveness of the biocide may be insufficient because of the unification of a large number of mold spores that enter the gypsum and the paper from the water used in the process of forming panels, and the argument coming from the air. In some cases, environmental legislation limited the concentration at which the biocide may be contained on the surface of the paper. From this it follows that in all cases the maximum allowed concentration of the biocide is sufficient to protect the paper and the cured secondary gypsum layer.

The growth of microorganisms conducive environment in which disputes can find moisture and nutrients needed for metabolism. Temperature is also a determining factor, and many types of microorganisms multiply at temperatures necessary for human life, under which gypsum Board is used most often. Thus, the potential ways to combat the growth of microorganisms are mainly in the control of access of moisture and nutrients. It is desirable to have a mechanism for the destruction of microorganisms, to�which begin to multiply within or on the surface of gypsum panels or cladding layer. In environments, which are used in gypsum Board, it is impossible to prevent access of water vapor and dispute, even though gypsum Board, typically used for interior decoration. In addition to the moisture that is present in the environment, in products used for interior decoration, water sometimes falls due to leaks, roof leaks or pipes, flooding, condensation, etc. These effects occur in the absence of any defects in manufacturing or application of gypsum Board. It is considered that after exposure to moisture traditional gypsum panel products become sensitive to the growth of microorganisms.

Starch is an example of nutrients in which microorganisms multiply. In gypsum panels starch is often used for a number of reasons. It can be added to a slurry of calcined gypsum to accelerate the adhesion between the middle layer and the facing layer. Often the lining layer produced from the paper, and starch may be a component of paper, traditionally used as a coating of gypsum panels. Particles dihydrate of calcium, coated with starch (sugar), often used as a curing accelerator in suspension calcined gypsum. Other starches can also be used to modify various properties of the composition comprising calcined gypsum. �if the facing materials or in the middle layer of gypsum plaster panels are starches, the nutrient content is sufficient for possible growth of microorganisms, because the spores interact with a nutrient medium starchy panel.

Sheet coating of gypsum panels, also known as cladding layers, coatings, paper coatings, etc., is obtained using methods of paper production, in which first receive the pulp is diluted, chemical additives and water. Weight pass through a sieve with the formation of the substrate randomly intertwined fibers. Excess water is removed by pressing the substrate or by application of suction. In the production of "wet phase" refers to a method of producing paper to remove water, and the stage of the method after the removal of excess water is called the "dry phase". Additives such as sizing agents, can be added during any or both of these stages.

Sizing substance is a hydrophobic compound, which improves the strength of the paper and impermeability to liquids such as water and ink. Alkylbetaine dimer ("AKD") and alchemistry anhydride ("AAA"), each of which is hydrophobic, are the most common sizing agents. Rosin and derivatives of rosin are another class of agents for the use�first paper, known in the paper industry. For high performance sizing sizing substance used in the form of very small particles. This condition, as well as hydrophobic properties, require emulsification AA and/or AKD in an aqueous solution suitable for injection and binding sizing agent and the fibers of the paper. Substance for gluing in the mass injected directly into the paper during the wet stage of the method of production. A substance for external sizing is applied to the surface of the finished paper product to dry step using methods of coating, such as dipping, spraying or rolling.

AA for sizing in the mass, as a rule, get at pulp and paper mills in the form of an emulsion with cationic starch as a stabilizer, as described in U.S. patent No. 6159339, the content of which is incorporated in this application by reference. Polymer with high charge density and low molecular weight can also be used as an emulsifier substances for the sizing of paper in the mass, in emulsion, containing water. Alternatively, AKD emulsion can be obtained by initial dispersion of the phosphate derivative of starch in water, which constitutes the continuous phase of the emulsion. Then AKD is added and thoroughly mixed PR� temperature, of approximately 140°F-160°F (60°C to 70°C), to obtain a uniform, homogeneous emulsion. Mixer with a large shear force is applied to mix the mixture metanovogo dimer and water phosphate starch to obtain the desired emulsion.

Disadvantages associated with known methods of emulsification AKD, usually eliminate by remote carrying out emulsification AKD and delivery of the paper manufacturers of finished emulsion. Emulsification AKD is a complex process that typically requires the use of expensive and highly specialized equipment. To stabilize emulsions AKD additives such as surfactants and protective colloids may be present in compositions containing the emulsion. AKD can interact with some of the additives, resulting in a reduction in the efficiency of a sizing agent by reducing the number of available active ingredient. Anionic surfactants present in the emulsion, AKD, additionally reduce the efficiency of the sizing agent, as a cellulose material, which should contact a sizing substance is anionic and, therefore, repels particles of a sizing agent, and does not ensure the introduction of a sizing agent in pulp and fiber into�on. Another disadvantage of the delivery model AKD emulsions is associated with its high cost, as the transportation of large amounts of water, which is part of the AKD emulsion, the paper manufacturer is expensive.

Emulsion AA are unstable, and the maximum shelf life is 6 to 8 hours depending on the decrease in water pH and temperature. Typically, the emulsion AA store for 30 minutes before use. It is desirable to keep AA in the form of a very dry oily liquid and to maximum delay time of receiving water emulsion. Often, manufacturers of paper get the required amount of emulsion AA 30 minutes before adding the solution into a paper weight. Cationic starch emulsifiers used to produce emulsion sizing agent AAA, provide a protective coat of cationic starch around each drop AA that binds a sizing substance with an anionic cellulose fibers of the paper. With continued leaching is mostly AA from fibers of technical water, which provides time for the flow decomposition AAA as a result of hydrolysis, which leads to lower efficiency AA as a sizing agent, causes the formation of deposits in the paper machine, leads to higher production costs and the problem�, related to the quality of the paper. Complex and expensive chemical methods on a wet stage often require a satisfactory holding a sizing agent. A study of a wet stage, such as high performance liquid chromatography ("HPLC"), is a traditional way of confirming acceptable and satisfactory retention sizing AA.

Earlier efforts reducing the growth of microorganisms in gypsum boards include replacing paper face layers with fiberglass lining materials, the removal of the nutrient source of starch and limiting the growth of microorganisms on the surfaces of the plate. Also attempts were made to obtain gypsum boards, resistant to growth of microorganisms by introducing a biocide, such as salt of pyrithione, in the middle layer, cladding layers, or in the middle layer and cladding layers are disclosed in U.S. patent No. 689752 entitled "Mold Resistant Gypsum Panel and Method of Making Same", incorporated in this application by reference.

Quaternary ammonium compounds according to the broad definition are a class of compounds having the General formula R1R2R3R4-N+Y-where the radicals can be identical or different to be part of a ring, and Y represents a counterion (anion). Typically�about, but not all cases, one of the radicals represents a long chain alkyl group. Specific Quaternary ammonium compounds have biocidal properties. In the prior art describes the use of biocidal Quaternary ammonium compounds in gypsum the middle layer or as a coating on the surface of the paper facing layer by spraying, dipping, rolling or any other method of coating on a dry stage.

Although Quaternary ammonium compounds are valued for their ability to resist the growth of microorganisms, upon receipt of paper applications often try to avoid, as these compounds lead to the formation of foam even at low concentrations. The foam has a negative effect on the quality of the finished paper product due to the formation of point defects, circular spots on the paper, reducing the strength of paper and reduce the amount of the resulting product. Often the problem of foaming involves the application of complex chemical methods on a wet stage to prevent foaming with the use of anti-foam compounds, or for removal of foam from paper pulp using obespechivaushyi compounds. Another method of controlling foam in aqueous solutions of Quaternary ammonium compounds is� the addition of anionic surfactants in the solution, which is described in published international patent application WO 2008/049616 entitled "Controlled Foam Aqueous Quaternary Ammonium And Phosphonium Compositions)) included in this application by reference. As noted in the publication, the biocidal efficacy of the Quaternary ammonium compounds, is reduced by adding anionic surfactants.

There remains a need in plaster slabs that have increased resistance to growth of microorganisms that do not violate their useful properties. In addition, there remains a need for commercially acceptable methods of production of these products. Also there remains a need in improving the effectiveness and applicability of AKD and AA when used for the sizing of paper, as well as to improve retention of biocidal compounds used for the production of paper.

BRIEF description of the INVENTION

One or more of these tasks to solve with the aid of the present invention, in which the proposed biocidal sizing emulsion containing a sizing substance and biocidal emulsifying agent in water. Biocidal sizing emulsion is used to produce biocidal paper for the application of gypsum panel. Another variant implementation is a biocidal gypsum panel with a paper facing layer that contains b�oldnow sizing emulsion.

Unexpectedly, it was found that the paper, which has useful properties of a sizing agent and a biocide, can be obtained without the use of certain emulsifiers and biocidal compounds. Unexpectedly, it was found that the biocidal emulsifiers to form the emulsion with a substance for the sizing of paper in the mass, which is added to paper pulp in the paper production process. Efficiency and cost reduction in the process of obtaining paper are achieved through dual functions of biocide.

As a result of possibility of application of the biocidal emulsifying agent as an emulsifier substances for the sizing of paper in the mass increase strength and service life of the finished paper product. The increase in strength is achieved by improving the resistance to liquid media resulting in efficient sizing. The lifetime improvement is achieved by improving resistance to microorganisms.

Compared with the emulsions of substances for the sizing of paper in the mass, known in the prior art, which are used in emulsifiers combined with starch, polymer and surface active substance of the claimed biocidal sizing emulsion contributes to improving the effectiveness of the method of producing paper. This increase is due to the fact that one connection, biocide, used instead of multiple chemical�ical additives. The use of starch, polymer or surface-active substances is not required as glued paper, obtained with the use of the biocidal sizing emulsion, also has a useful property, which consists in resistance to the growth of microorganisms, and its receipt does not require the introduction of other additives in addition to the emulsifier, sizing agent.

Also, if the biocidal emulsifying agent chosen not containing starch cationic Quaternary ammonium compound, then suddenly realized additional improvement of the efficiency of the method of producing paper. The amount of foam, the formation of which, as a rule, involve the use of Quaternary ammonium compounds in the paper pulp, decreases, or there is a significant destabilization of foam. To combat foam does not require the use of antifoaming or obespechivaushyi agents. Thus, the efficiency associated with the use of a single connection, performs three functions, which previously required the use of at least three different compounds, determined by application of the biocidal emulsifying agent in biocidal sizing emulsion.

Biocidal emulsifying agent used in biocidal sizing emulsion is cationic and provides good retention in the sheet of paper, which reduces the need for�of anenia complex chemical ways to improve retention at the wet stage. The need for quality control on a dry stage to determine an appropriate and sufficient content of biocide are also minimized. It is expected that these improvements to the production method of the paper will be expressed in the form of a less complex, less costly and more stable methods and results in the paper face layers and gypsum panels, which are used in paper coating.

Emulsion AA, which is used as a biocidal emulsifying agent, is stable over an extended period of time and increases the efficiency and applicability AU used for the sizing of paper. It is implied that the biocidal sizing emulsion obtained using AAA, you can also get at a pulp and paper mill or factory for the production of plaster, which, thus, leads to lower transportation costs resulting pre-emulsion of AKD and the amount of water necessary to obtain one.

Another important characteristic of the present invention is that the biocidal gypsum panel can be obtained, without resorting to the use of fiberglass or other less desirable facing surfaces other than paper. One of the improvements is the provision of a greater number of biocide in paper sheet coating, to�oroe is a layer of paper, enjoying close proximity with the surface of the gypsum panel, where the most likely occurrence problem of violation of the appearance caused by mildew, molds or fungus.

DETAILED description of the INVENTION

In the present invention proposed biocidal sizing emulsion, in which one phase amount to the agent for the sizing of paper in mass and biocidal emulsifying agent. The second continuous phase is water. The necessity of using a different biocide or an emulsifier in the biocidal sizing emulsion according to the present invention is absent. Biocidal sizing emulsion can be applied to obtain a paper coating materials for gypsum boards. The use of biocidal sizing emulsion provides an improved method of producing, which is more efficient and commercially acceptable, as well as improved product containing biocidal emulsifying agent, which is retained better in the product, such as paper facing material.

Compounds in the present description called "biocidal emulsifying agents", limited to biocides, which form the emulsion with a substance for the sizing of paper in mass and are part of the finished paper product and, thus, confer a paper product antimicrobial properties. Biocidal �of obaka ("biocide") the paper is effective for reducing the growth of microorganisms on wall panels and cladding layers. The terms microbe, bacterium, mold, musty mushroom and fungus, which are used interchangeably, refer to a variety of microorganisms whose growth is possible on said surfaces.

Preferred agents for the sizing in the mass are alchemistry anhydride ("AAA") and alkylbetaine dimer ("AKD"). AA used for sizing in the mass, is an oily liquid at room temperature. It is stored in locations without access of moisture, since it is very unstable. AA react with water or water vapor, hydrolyzed, and its use as an agent for sizing in the mass becomes impossible. One example of sizing AA which is effective in the present invention is Bubond 650 (Buckman Laboratories, Memphis, TN). In addition, Prequel® 1000/Prequel® 630 (Ashland Hercules, Wilmington, DE) and Nalco® 7548/Nalco® 7540 (Nalco, Naperville, IL) are further examples of the sizing AA.

In one embodiment, the implementation of the biocidal sizing emulsion containing a substance for the sizing of paper in mass, get with the use of the biocidal emulsifying agent and water. Preferably, receiving the emulsion AA used for the sizing of paper in the mass, and the biocidal emulsifying agent, which is not containing starch cationic Quaternary ammonium compound. More specifically, odd�antichnymi ammonium compounds, appropriate for a given biocidal sizing emulsion, are chloride alkyldimethylbenzylammonium (ADBAC), chloride of alkyldimethylbenzylammonium (EBU), chloride of diallyldimethylammonium, chloride didecyldimethylammonium and combinations thereof. In another embodiment not containing starch cationic biocide is a single compound or combination of compounds, selected from chloride decaline, chloride didecyldimethylammonium, didodecyldimethylammonium,

dihexylfluorene, long-chain alkylamine, a guanidine, bis(3-aminopropyl)dodecylamine, polyaminopropylbiguanide or improperlinadequate. If one of the biocidal emulsifying agents selected for the formation of the emulsion with a substance for the sizing of paper in the mass, the use of additional emulsifiers are not required. Polymers, surfactants, starches, and other known compounds used for emulsification or stabilization AA and AKD, it is possible not to apply.

Emulsification agents for sizing in the mass provides getting small drops, which allow to achieve efficient binding of a sizing agent and paper pulp fibers. AA used for sizing, is a hydrophobic oily liquid, which under normal conditions contains 100% solid�C. Biocidal emulsifying agent, typically contains from 20 to 80% solids, and at first it is diluted with the initial water in the static mixer. The number of source water used for dilution of the biocidal emulsifying agent is about 10% of the total amount of process water required for emulsification of the biocide containing 40% solids. In the case of a biocidal emulsifying agent containing less than 40% solids, may require a small amount of water or use of water may not be required at all. The flow of diluted biocidal emulsifying agent is combined with the flow AA containing 100% solids and the resulting solution is pumped through a turbine pump with pressure difference, part of 200-230 psi, to obtain biocidal sizing emulsion. The droplet size of the biocidal sizing emulsion is in the range from 0.5 microns to 1.5 microns in diameter. Stream biocidal sizing emulsion is further diluted secondary water. The solids content in the emulsion AA can be modified to achieve a concentration of approximately 1%, after which the emulsion is pumped with a lot to get the paper. Depending on the operating parameters final concentration AA in the emulsion can be changed to the equivalent of or less than 1%; but as the amount of water used in emulgel�, is separately defined for a particular paper machine, the necessity of change of concentration is absent.

The amount of the biocidal emulsifying agent used in biocidal sizing emulsion is directly related to the amount of biocide required to combat the growth of microorganisms, and the number required for emulsification of sizing agent. Paper with different composition is prepared for use in various environments, thus, the amount that is required to combat the microorganisms that may increase or decrease depending on the possible access of nutrients, moisture, and other factors, sufficient to accelerate the growth of microorganisms. Similarly, different amounts of emulsifier depending on the quality of a sizing agent may be required to achieve sufficient protection to get the paper from the liquid media. Specified acceptable dosage or concentration of the biocidal emulsifying agent is then used to produce emulsions AA, followed by checking the size of the particles of foaming and emulsion stability.

The dosage of sizing agent is determined by assessing the moisture resistance required for a particular class or type of paper. In General, these classes have a higher resistance, since the requirements for these classes include the mouth�echeveste to mildew and moisture. The ratio of substances for sizing in the mass, also known as a sizing agent, and the biocidal emulsifying agent preferably makes up one part of a sizing agent to one part of the biocidal emulsifying agent. The ratio of the sizing agent and the biocidal emulsifying agent may be in the range from 1:1 to 1:0,5. The amount of sizing agent can vary, but typically ranges from 2 lbs/ton to 20 lbs/ton (0.9 kg/ton up to 9 kg/tonne) paper followed by air drying; often, from £ 5/tonne to £ 10/tonne (from 2.2 kg/tonne to 4.5 kg/tonne). For example, 5000 ppm sizing emulsion AA contains 41.2% of the biocidal emulsifying agent or 2060 ppm, and the remainder of the material is a sizing agent AA.

Below in Example 2, the method of selecting the concentration of the biocidal emulsifying agent. For example, when using 2060 ppm biocidal emulsifying agent, as described above, a fungal growth after treatment with standard 1% CMC solution with a mixture containing 0.25% sizing AA, must not occur.

It is understood that the AKD used for sizing in the mass, is an alternative and suitable replacement AA in biocidal sizing emulsion according to the present invention. Biocidal sizing emulsion of AKD can be obtained at pulp and paper mills or factories for the production of GI�lowest panels that, therefore, leads to lower transportation costs resulting pre-emulsion of AKD and the amount of water necessary to obtain one. Furthermore, it was assumed that the surface-active substance or the polymer can be applied in combination with the biocidal sizing emulsion according to the present invention. One of the variants of implementation involves the use of non-aromatic surfactants or polymer in the biocidal sizing emulsion.

The emulsification AA or AKD used as a sizing agent, with the use of the biocidal emulsifying agent is carried out using known methods of emulsification. Changes of standard equipment is not required, but minor changes of the components flow or back pressure in the turbine it is possible to produce the biocidal sizing emulsion of a suitable quality, i.e. emulsions having a suitable size and distribution of particles, and stability.

Describes an approximate method is used for emulsification of sizing agent AA in the laboratory. First, weigh the bowl of a mixer Senco in a bowl and add 1 gram of sizing agent AA. Then in a bowl containing a sizing agent AA, add 0.7 grams of the biocidal emulsifying agent and the amount of water required to obtain 10 grams of biocidal sizing emulsion, containing two of the above ingredient. Put the bowl Senco in the mixer and turn the mixer on maximum power for 90 seconds. The result is a 100 grams of finished sizing agent AA for the treatment of a dilute suspension of cellulose fibres. If necessary, the relative content of emulsifier can be changed depending on the solids content and the quality of the emulsion.

In another embodiment, the implementation of get glued laminated paper. In this case, you can use two sections of emulsification to minimize downtime in the production of paper. One or more layers of paper is produced by mixing with biocidal emulsifying agent and a sizing substance to prevent the growth of mold, and the second emulsifier can be applied to obtain sized paper using traditional methods of emulsification. This reduces the cost of sizing and allows for the processing of the biocide only the outer layers of paper that are exposed to mold spores. Biocidal sizing emulsion can be added to paper pulp by introducing with the inlet side of the mixing pump, but you can add on the discharge side of the pump.

When choosing the biocidal emulsifying agent for the method of producing paper using the same criteria as in the case of biocidal EMU�of igator for biocidal sizing emulsion. There is a balance between the amount of added water and the resulting dilution in the paper machine. When you add more water sizing substance is better dispersed in the volume and its distribution becomes more homogeneous. However, adding additional amounts of water leads to additional cost, as water is usually softened. This can lead to changes in the water balance method for producing paper, and call for the release of some quantity of waste water as waste.

Biocidal sizing emulsion with a solids content constituting 1%, stored in a small reservoir, which updates every 30-60 minutes to minimize hydrolysis. Sizing substance is injected into the mixing pump, using a centrifuge at a low pressure of from 20 to 25 psi. The addition of a solution of a sizing agent in paper pulp in view of viscosity, flow of fibers and percentage of the particulates and diluted sizing agent in the method of producing paper can be carried out on any conventional paper machine. Often get paper facing materials, consisting of several strata or layers. Sometimes using no more than two layers. In other cases, use seven words�in or more. Supplement to the paper a sizing substance can be administered in a paper weight through the headbox or before admission of the mixture into the refiner, but generally, additives are added to the mixing pump, which delivers the diluted mixture into headbox.

In another embodiment of the present invention applied to the above emulsion and the paper in the method of producing a mould resistant gypsum panels, which includes the selection of the biocidal emulsifying agent, emulsification AA or AKD used as agents for the sizing in the mass, with biocidal emulsifying agent to obtain biocidal sizing emulsion, the addition of biocidal sizing emulsion to a paper weight, which is processed with the formation of the paper facing material and then applied to the gypsum slurry, which is grasped with the formation of gypsum panels or slabs. A paper coating materials is often part of the process of manufacturing gypsum boards by the manufacturers of gypsum Board.

Obtaining slurry of hemihydrate of calcium sulfate and water is carried out in accordance with conventional methods for producing suspensions of gypsum. The hemihydrate of calcium sulfate and water, the amount of which exceeds that required for rehydration of the hemihydrate of calcium sulfate, is mixed in the form of a fluid slurry. Supplements, such as� starch, foam, an accelerator, a dispersing agent, etc., is considered as part of the gypsum slurry. Negative or desired interaction biocidal additives and paper facing material no.

Antimicrobial paper facing material, which is obtained from paper pulp, enhanced with the use of the biocidal sizing emulsion is placed on the molding table, located on a conveyer belt. The gypsum slurry is continuously applied to the facing material. After the paper and the suspension cross conveyor, the second paper facing material can be applied to the upper surface of the gypsum slurry before drying. The setting of the gypsum slurry includes an exothermic reaction in which water is captured by the hemihydrate of calcium sulfate, and crystals of gypsum. As you progress through the crystallization, the suspension becomes more solid. The flow setting is determined by the temperature rise of the suspension. The plant on production of gypsum panels suitable option is to measure the temperature of the material flowing through the pipeline, in the place where the material is cut into fragments of plates of the desired size. Finished gypsum Board is resistant to the action of microorganisms due to the content of at least one antimicrobial �magnago cladding coatings. It is implied that the biocidal emulsifying agent can be added to the gypsum slurry, and thus, it can also be present in the middle layer of plaster.

It should be understood that the following examples further disclose and illustrate the invention. The examples do not limit the scope of the invention.

EXAMPLE 1

In the laboratory sheets of handmade paper were obtained using different emulsions for sizing in the mass. The sheets had excellent moisture resistance and good resistance to growth of microorganisms. Sizing emulsions for paper sheets obtained by applying a sizing agent AA NALCO® 7540 produced in Naperville, IL. Sizing substance is combined with each of the antimicrobial components shown in Tables I and II with a mass ratio of sizing agent AA and the biocidal emulsifying agent comprising 10:1.

As the biocidal emulsifying agents used Quaternary ammonium chlorides, which were received in Mason Chemical Company, Joliet, IL. MAQUAT® MC1416 and MAQUAT® MCI412 both contained 80% of active chloride alkyldimethylbenzylammonium (ADBAC). MAQUAT® MQ2525 contained 80% of active combinations of chloride of alkyldimethylbenzylammonium and chloride of alkyldimethylbenzylammonium. MAQUAT® MQ624M received with 80% active biocidal emulsifying agent, but was diluted and used in the laboratory in the form of active co�the combination of a 45% content of chloride alkyldimethylbenzylammonium and chloride of diallyldimethylammonium. MAQUAT® E, chloride didecyldimethylammonium, was similarly diluted and reduced the content of active connections from 80% to 45%.

Chetyrehpostovye two-layer plates with a handmade character was received in the laboratory with the help of this method, which was applied sheet form for manual low tide, developed in British laboratories. Weight containing 100% waste cardboard containers ("OCC"), was ground with pulping. Biocidal sizing emulsion AA in various biocides are shown in Table 1, obtained by adding an aqueous solution of the biocidal emulsifying a sizing agent in accordance with the laboratory method of emulsification AA above, to obtain the emulsified droplets AA the right size. The resulting aqueous biocidal sizing emulsion was further diluted with water until the content of diluted sizing agent AA and the biocidal emulsifying agent, comprising 1% or less. A slurry containing paper pulp, water and emulsified sizing substance is then extruded in a rolling press Adirondack at 20 psi, the sheets were dried in a laboratory drying drum at 240°F (115°C) for 2.5 minutes.

Then investigated the resistance and mildew resistance of the obtained sheet with a handmade character. Research moisture resistance included the Cobb test with the standard TAPPI procedure T, the description of which is incorporated in this application by reference, and a study on the method of "boats in boiling water (Boiling Boat), which measure the time (1000 seconds) required for a wet 50% of the paper sheet in boiling water. The Cobb test was performed at 120°F (49°C) for 3 minutes.

In the study by the method of "boats in boiling water" studied the swimming of a sheet of paper on boiling water to determine the level of water resistance. Paper samples were obtained by cutting the paper into sheets of size 12"×12" (30×30 cm), which was investigated further. Paper sample was placed glue side (glue side is a side which is attached to the gypsum panel face down on a flat surface. 6"×6" clamp or solid flat object placed in the exact center of the paper. With the help of a clip made bends along each of its faces and at the corners of the sheet and were obtained from the three-dimensional sheet of paper similar to the boat structure. One corner of the sample of paper was folded and connected to the adjacent side, and then fastened with clips. To secure each corner using two staples. The specified procedure folding and fastening by means of clips repeated for each party to receive and retain the shape of a paper boat. 4'×4' (120×120 cm) rubber stamp was used for drawing the grid in the center (or as close as possible to the centrifugal�GWS) bottom paper boats.

Square cuvette made of aluminum or stainless steel with a side of the base 10" (25 cm) and a depth of 3" (7.5 cm) was placed on a tile with a side constituting at least 10" (25 cm). The cuvette was filled about 2/3 with water, was placed in the water thermometer and the tumbler tiles are translated in the "maximum heating". When the water temperature reached 97°C±3°C paper boat placed in the water and run the stopwatch. Wetting the paper or of the paper was determined by the darkening wet area. Using the measuring grid measured the size of the darkened portion of the bottom of the boat after 5 and 15 minutes, provided that the wet paper is not reached 50%. The study was stopped after reaching 50% wet (12-13 grid cells) or 15 minutes (1000 seconds).

To measure the wet bottom of the boat counted the number of wet grid cells. Values were rounded to ¼ of a square. The number of squares was multiplied by 4 to determine wetting in percent.

Table I shows the test results of Cobb and studies using boats in boiling water, which show the effectiveness of applying a sizing agent AA in various biocidal sizing emulsions. Both groups of the research results demonstrate a very good gluing paper. In the samples marked with alphanumeric codes from B1 to F3, the polymer was added. Sample And ballcontroller and did not contain biocidal emulsifying agent, he was received with application AA for sizing in the mass and the polymer emulsifier (NALCO® 7541).

Table II shows the test results of Cobb and studies using boats in boiling water, which show the effectiveness of applying a sizing agent AA in emulsions containing polymer NALCO® 7541. Compare Cobb test results and studies using boats in boiling water indicates a very good sizing for all samples. This conclusion is confirmed by the fact that wet-50% of paper in the study by the method of the boats in boiling water required more than 1000 seconds (17 minutes). The Cobb test results were also very good. Unexpected was the fact that AA used as an agent for sizing in the mass, have approximately equal efficacy in emulsification with biocidal emulsifier and emulsification of the polymer in accordance with conventional practice.

TABLE I
Code. No.BiocidePR. prophetic./ tonPolymer/ tonBiocide/ tonneg Cobb/ 100 cm2h boat in Kip. water
And�control(no biocide) 10700,491000+
B1MAQUAT MC 141610010,511000+
B2MAQUAT MC 141620020,561000+
B3MAQUAT MC 141630030,481000+
C1MAQUAT MC 141210010,491000+
C2MAQUAT MC 141220020,521000+
C3MAQUAT MC 141230 030,511000+
D1MAQUAT MQ 252510010,541000+
D2MAQUAT MQ 252520020,531000+
D3MAQUAT MQ 252530030,491000+
E1MAQUAT MQ 624M (modified)10010,651000+
E2MAQUAT MQ 624M (modified)20020,581000+
E3MAQUAT MQ 624M (modified) 30030,551000+
F1MAQUAT 4480E10010,631000+
F2MAQUAT 4480E20020,661000+
F3MAQUAT 4480E30030,571000+

TABLE II
Code. No.BiocidePR. prophetic./ tonPolymer/ tonBiocide/ tonneg Cobb/ 100 cm2h boat in Kip. water
G1FUNGITROL 920 - 20%1071 0,621000+
G2FUNGITROL 920 - 20%20720,581000+
G3FUNGITROL 920 - 20%30730,601000+
HIFUNGITROL 11 - 100%10710,571000+
H2FUNGITROL 11 - 100%20720,621000+
H3FUNGITROL 11 - 100%30730,631000+

All of the samples, And-N3, shown in Tables I and II, as well as another control sample was also investigated using a modified test determining the impact of fungus on the outer vid accordance with ASTM G21. Using a control sample was confirmed that the study is the growth of mold, taped and behavior of the samples is similar to control sample. Two paper sample with an area of one square inch (6.3 cm2) was cut from each leaf and placed in the solidified agar containing nutrient salts, in a Petri dish so that we can explore each side of the sample paper. A Petri dish with paper samples were incubated at 28-30°C With a relative humidity of over 85% during the period of time, after which the samples investigated. Samples of paper were moistened with sterile water, so they only contain mold spores that fall from the air.

On 7 and 14 day explored the front and back sides of the paper samples to determine growth of microorganisms on the surface. The results are shown in Table IV. A value of "0" indicates no growth of microorganisms on the surface of the sample. A value of "1" corresponds to 10% growth, "2" means 11-30% increase, "3" means 31-60% growth; and "4" corresponds to the growth rate of over 61%. Determine the ratings of the paper samples are shown in Table 4, are shown in Table III:

TABLE III
The minimum time interval�OST The maximum time intervalGrowthASTM G-21 USG ratingOverall rating
Less than 7 daysThe rise7 daysThe risefrom 3 to 4Not resistant to fungus
7 daysGrowth is absent14 daysThe risefrom 3 to 4Not resistant to fungus
7 daysGrowth is absent14 daysA slight increasefrom 0 to 2Moderately resistant to fungus
7 daysMissing14 daysMissing0Resistant to fungus

TABLE IV
CODE. No.7 DAYS14 DAYS14 DAYS
SAMPLETRANS. sideBackTRANS. sideBack
And0444
B11344
B21021
B32144
C14444
C21444
C3214 4
D11444
D21041
D34444
E12044
E20144
E34444
F10244
F24444
F3444 4
CONTROL4444

Code samples in Table IV correspond to the code values of the samples in Tables I and II. Sample a was a control. Biocidal effect was observed in the samples, which added biocidal emulsifying agent. It is implied that increasing the concentration of the biocidal emulsifying agent improves antimicrobial characteristics of paper.

EXAMPLE 2

Biocidal sizing emulsion used in the method of producing a paper facing material, resistant to mold, including the choice of the biocidal emulsifying agent. One way of selecting the concentration of one of the biocidal emulsifying agent or mixture of several emulsifiers were carrying out serial dilutions of the components before emulsification AA or the processing of paper. Carboxymethylcellulose ("CMC") with a medium or low molecular weight, the emulsion stabilizer, at 1% concentration and a sizing agent AA in 0.25% concentration was mixed in a beaker as a standard solution. Five millilitres of standard solution obtained using a pipette, transferred to eight different sterile test tubes for research. Investigated the biocidal emulsifying agent of get so�Lyali with getting a 2.5% solution. Cm. Table V.

TABLE V
Studies. samples.Conc. biocide (ppm)CMC+ PR AA (ml)Sterile water (ml)Disputes 10,000 cfuBiocide 2,5%Total volume(ml)
105,04,80,2010
2100005,00,80,24,010
350005,02,80,22,010
425005,03,80,21,010
51250 5,04,30,20,510
66255,04,550,20,2510
73125,0The 4.670,20,1310
81565,04,740,20,0610

1 ml aliquot was placed in a Petri dish and examined after 3, 5 or 7 days. Counted the number of mold colonies in each Petri dish to determine the number of colonies of fungi at the lowest concentration of the biocidal emulsifying agent. After completion of these studies received standard piece of hand tint with the use of a biocide for emulsification sizing agent AA. Been evaluated by features sizing, determined the properties of the paper and conducted the test on the effect of the fungus on the paper in accordance with ASTM G21.

It is implied that the higher number of b�ienaga emulsifier lead to improved resistance to microorganisms and do not reduce sizing or other properties of the paper product.

Although shown and described specific variants of realization of the emulsification of sizing agent with the use of a biocide, biocide paper facing material and the biocidal gypsum Board, specialists in the art it will be obvious that it is possible to carry out changes and modifications without departing from the broader aspects of the invention proposed in the above formula of the invention.

1. Biocidal sizing emulsion containing:
agent for sizing in the mass; and
biocidal emulsifying agent, and agent for the sizing in the mass and biocidal emulsifying agent emulsified in water, wherein the biocidal emulsifying agent is not containing starch Quaternary ammonium compound, and wherein the sizing agent for in mass and biocidal emulsifying agent emulsified in water.

2. Biocidal sizing emulsion according to claim 1, characterized in that it contains no additional emulsifier.

3. Biocidal sizing emulsion according to claim 1, characterized in that the biocidal emulsifying agent is not containing starch cationic Quaternary ammonium compounds.

4. Biocidal sizing emulsion according to claim 1, characterized in that the agent for the sizing in the mass selected from the group consisting of alkenylamine anhydride and alkylating dimer.

5. Biocidal sizing emulsion according to claim 1,�likusasa, that Quaternary ammonium compounds represents at least one compound selected from the group consisting of chloride, alkyldimethylbenzylammonium, chloride of alkyldimethylbenzylammonium, chloride of diallyldimethylammonium, chloride didecyldimethylammonium and combinations thereof.

6. Biocidal sizing emulsion according to claim 1, characterized in that the agent for the sizing in the mass is alchemistry anhydride.

7. Biocidal sizing emulsion according to claim 1, characterized in that the biocidal emulsifying agent selected from the group consisting of chloride decaline, chloride didecyldimethylammonium, didodecyldimethylammonium, , long-chain alkylamine, a guanidine, bis(3-aminopropyl)dodecylamine, polyaminopropylbiguanide or combinations thereof.

8. Biocidal sizing emulsion according to claim 1, characterized in that the ratio of the sizing agent and the biocidal emulsifying agent is one part of a sizing agent on the half of the parts to one part of the biocidal emulsifying agent.



 

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FIELD: construction.

SUBSTANCE: SVF system comprises facing tiles, each having a retaining ledge directed downwards, at the face side in the upper part it comprises a horizontal ledge, and in the lower part - a ledge with a shelf directed downwards, and which are made as capable of arrangement as one above another as overlapping with each other on their upper and lower edges. On the face side of each tile, along one of the ends there is a vertical ledge. A subsystem for fixation of facing tiles is equipped with horizontal profiles, each of which comprises a flat part for attachment to vertical profiles, in the lower part it comprises an elastic stop for contact with the rear side of the tile, and in the upper part it comprises a bend with a shelf parallel to the flat part, besides, the upper edge of the shelf is made as capable of placement in the slot, formed by the retaining ledge above the tile, and the lower edge of the shelf is made as capable of placement of the upper edge of the lower tile between it and the flat part of the profile.

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4 cl, 16 dwg

FIELD: construction.

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FIELD: construction.

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FIELD: construction.

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EFFECT: increased bearing capacity and reliability of a curtain wall system.

8 cl, 7 dwg

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FIELD: construction.

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9 cl, 6 dwg

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5 cl, 11 dwg

FIELD: process engineering.

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FIELD: process engineering.

SUBSTANCE: invention relates to production of glued laminar structures. Laminar composite comprises two surface layers of sheet material glued together and two inner layers arranged there between. Every said inner layer is composed by reinforced cellular structure of bamboo fragments shaped to plates or chips ob bamboo walls obtained by cutting the bamboo stem along the walls and across the stem. Cellular structure reinforcement is made with the help screen of glass fibre or glass fibre web. Note here that cellular structure is laid in screen or web and closed from above by another screen or web. Besides, this invention describes the versions of laminar material.

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FIELD: construction.

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6 cl, 4 dwg

FIELD: personal use items.

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EFFECT: improved quality of edge faces.

12 cl, 11 dwg

FIELD: construction.

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3 cl, 1 dwg

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SUBSTANCE: method for winding of conic revolution shell from polymer composite materials, comprising power shell and frames, in which material is wound on hooks. Hooks are made in the form of spiked tape from nails and flaky plastic from at least two strips of glass tissue. Nail heads are located between strips. Tapes are installed evenly along circumference onto power shell in the hook area and are fixed. Then hook material is wound with thickness that does not exceed thickness of nails. Then the following group of spiked tapes is installed with displacement in circumferential direction relative to the previous ones and frame material is again wound. Operation is repeated until frame of required thickness is obtained.

EFFECT: creation of more manufacturable structure of conic revolution shell with increased reliability of its operation.

4 cl, 6 dwg

Sandwich panels // 2341546

FIELD: construction.

SUBSTANCE: sandwich panels contain insulating layer, which is provided with glued layer of coating on, at least, one side. Coating contains glue resulted from reaction of aqueous solution of alkali silicate with polyisocyanate. Mass ratio between aqueous solution of alkali silicate and polyisocyanate is between 1:2 and 5:1.

EFFECT: low heating effect, increase fire safety class.

15 cl, 8 tbl, 6 ex

Building panel // 2340742

FIELD: construction industry.

SUBSTANCE: invention refers to construction industry, and namely to building panel. Panel is used in housebuilding as slab element or wall element. Panel consists of many OSB-plates (oriented strand boards) located near each other. OSB-plates are bonded to each other, thus forming multiple layers.

EFFECT: manufacture of cost-effective panel having high heat-insulating and sound-insulating properties.

8 cl, 1 dwg

FIELD: building.

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EFFECT: reduction of terms of building and increase of heat-insulating properties.

23 cl, 3 dwg

Part of furniture // 2508191

FIELD: woodworking.

SUBSTANCE: part of furniture comprises wood composite material and facing in the form of paper and resin film material based on the paper with weight of 70-80 g/m2 and impregnating thermosetting formaldehyde-containing polymer. The wood composite material comprises formaldehyde in an amount of not more than 4 mg per 100 g of the board. The thermosetting polymer comprises melamine in an amount of not less than 25 g/m2 of the film. All the plates and all edges of the furniture part are faced and all its technological holes are sealed. Formaldehyde emission from the part of the furniture does not exceed 0.01 mg/m3 after its exposure in the conditions simulating the operating conditions, till stabilisation of the formaldehyde emission indicator.

EFFECT: enhanced chemical safety of the furniture parts.

1 tbl

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