The way emergency seal damage in containers with hazardous materials
(57) Abstract:The invention relates to a method of sealing an emergency containers with hazardous materials. The method involves the preliminary formation of local volumes in the area surrounding the damaged area, through the device, preparing a sealing composition and introducing it into the damaged area and local volumes. The device consists of a cylindrical ring, which represents a restrictive element, and a flexible restraining elements, hermetically United with restrictive element and the container tightening elements. In addition to the sealing end damage to the container cylindrical ring provided with a hermetically United with him by the head. A cylindrical ring holes entering the sealing composition and output of displaced air. Cylindrical ring sets over the damage zone with a gap relative to the container by means of the fixing elements. When this gap overlapping the flexible limiting elements on the outer edges of the cylindrical rings. Technical result achieved: reduction of environmental hazards for with the. C.p. f-crystals, 1 Il. The present invention relates to the field of chemical processing element structures using polymeric materials, in particular to methods of sealing damage that occurs in containers with hazardous materials or environments, and can be used to repair damaged equipment.The relevance of the problem to be solved based on the inadmissibility of situations in which a possible leakage of materials characterized by a high degree of ecological risk as a result of local damage tanks (tanks, containers) in which these materials are stored or transported.The known method of repairing damage (application Japan 49-31029, MKI 09 To 3/10), consisting in the preparation of polymeric sealing composition, the introduction of this composition into the injury site, followed by foaming and curing, while polyurethane prepolymer included in the sealing composition contains a filler, characterized by a moisture content of less than 0.1%. The process of curing and foaming carried out due to humidity or moisture present in the amount of damage.The disadvantages of Ananiah significant amount without the use of assistive devices and high duration of the curing process.Closest to the claimed technical essence and the achieved technical result is a method of sealing faults in containers (USSR 1823479, MKI 09 To 3/12, published. BI 10 from 10.04.96), including preliminary preparation sealing compositions, introducing it under pressure into the injury site and exposure to the air until the final curing at a temperature of 20-120oC for 0.5 to 48 hours.The disadvantage of the prototype is the high duration of the curing process, the problematic use of sealing compositions, proposed method, in terms of environmentally hazardous materials, the necessity of using special equipment to force fill the cavity damage the sealing composition. In addition, if significant damage occurs the problem further securing of the sealing compositions in space damage.The problem solved by the invention is to develop a method using a device for the secure sealing of the damaged container containing environmentally hazardous materials, with the possibility of subsequent transport and disassembly of the con and environmental safety and improving the reliability of seal damage of containers with hazardous materials, as well as saving raw materials due to the localization of the sealing zone to provide the opportunity for subsequent transport and disassembly of the container.Additional technical result is also in keeping ease of disassembly used in the method of the device by performing the cylindrical split ring.Additional technical result consists in providing the sealing efficiency, increasing the savings of material, simplicity subsequent disassembly, eliminating the possibility of unauthorized chemical interaction with the conveyed material.Additional technical result of the proposed method is to improve the reliability of sealing of the gap between the cylindrical ring and the housing.The above new technical result and the task is provided by the fact that in the known method the emergency seal damage in containers with hazardous materials, which consists in preparing a sealing composition, the introduction of it in the injury and exposure to air prior to final curing, in accordance with the proposed method before the introduction hermetis the STW device, contains restrictive element made of composite of rigid and flexible restrictive elements, and as a restrictive element using a cylindrical ring covering the container for forming, in the case of the location of the damage on the side surface of the container in which you have through holes to fill, sealing compositions and output air with the possibility of overlap, and/or cylindrical ring is further provided with United with him in the bottom with the formation of the parts in the form of a hollow glass that covers the container with the ends with the possibility of complete overlap of all damaged if the damage to the ends of the containers, the cylindrical ring sets over the damage zone with a gap relative to the container by means of the fixing elements, and the gap overlapping the flexible limiting elements on the outer edges of the cylindrical ring, hermetically connected to one side with a cylindrical ring, and on the other side surface of the container with the formation of a sealed cavity with subsequent introduction into the formed cavity and damage the sealing comp is nauseosa composition of cold hardening on the basis of a mixture of polyether oligomers and isocyanate.In addition, used in the proposed method, the device for the formation of a local volume of a cylindrical ring, covering the container for forming, is made detachable.In addition, used in the proposed method, the device is flexible restrictive elements compresses with clamps.The proposed method is illustrated as follows.In the formation of damage in containers with hazardous materials there is a need for extra sealing, sufficient for safe transportation of the container to the place of burial or disposal of contained hazardous materials. The ability to seal minor cracks and through-hole or multiple holes may be provided for direct pouring of self-curing compositions in the cavity of the damage. However problematic significant amounts of damage to sealing without supporting elements. For this purpose it is offered over an area of damage to pre-form the local volumes that could accurately to introduce the composition into the cavity of the damage and fix it, and sufficiently tight to secure it on the limits of p is s specified local volumes in this way will be done with the use of assistive devices containing the bounding elements, which are fixed around the damaged area by means of the clamping elements.Used in the proposed method, the device is designed to eliminate damage, causing an emergency situation, characterized by the risk of release of hazardous materials from the container into the environment. The presence in the structure of the cylindrical ring, covering the container side surface, ensures the formation of a closed cavity around the damaged area.It should be noted that the types of damages that are used in the proposed method, device, ranging from minor cracks in size to the through holes, leaving the base surface of the container with a surface area sufficient for fixing the cylindrical rings.The cylindrical ring is fixed over the damaged area by means of the fixing elements, based on an undamaged area of the side surface of the container. To ensure reliable fill the entire volume of the damaged cavity of the cylindrical ring is placed with a gap in relation to the damage that is provided by centering perepiska characteristics of the sealing composition (viscosity, yield strength, ambient temperature). As elements of fixation can be used any threaded parts (bolts, screws, etc.,), screw in the through hole of the cylindrical ring and resting on the outer undamaged area of the side surface of the container. This view of the proposed device is in the case of the location of the damage on the side surface of the container.If the location of the damage on the ends of the container and adjacent the area of the side surface of the container cylindrical ring is provided in addition hermetically United with him a solid metal plate. Cylindrical ring in this case is also fixed on the side surface of the container by means of the fixing elements. In this case, bounding the hollow element in the form of glass is installed with a gap relative to the end surface and damage. And in the first and in the second case, for the formation of the closed cavity around the damaged area in your device provides for a flexible restrictive elements, which is made of rubber or tissues, prevents the leakage of the sealing composition. This maximum corresponds to the condition of obtaining geobase and on the cylindrical ring by clamps or any other coupling element.A cylindrical ring provided through-holes for inserting sealing compositions and exit displaced by air.In those cases, when the contact of the contents of the container with a sealing composition is invalid for reasons of possible unauthorized chemical interaction, your device is additionally installed flexible restrictive elements placed on the damaged area and fixed tightly on the container.After you install the device used to prepare a sealing arrangement in accordance with the type contained in the container of environmentally hazardous materials and extent of the damage.The best way to solve the problem of full filling amount of damage with the use of a foaming composition of cold hardening, because when curing occurs a significant increase in volume, while maintaining sufficient mechanical properties that can withstand congestion due to excess pressure arising on the background of high temperatures developing in the foaming. The efficiency of such sealing can be achieved using the have a viscosity, enough to fill narrow gaps and relatively low toxicity. In connection with short viability of such compositions fill their damaged in the cavity must be made immediately after final mixing of the components. The use of such compositions in view of the specific patterns simultaneously and provides a good seal damage and ease the subsequent disassembly.The drawing shows used in the proposed method, the device for sealing damaged And located on the side surface of the container 1, and damage B located on the end part of the container 1. Cylindrical ring 2 is installed with a gap above the damage and fixed to the body of the container 1 by means of the clamping elements 3. The gaps between the container and the cylindrical ring sealed flexible cuffs 4. The cuff 4 is fixed to the container and the ring by means of clamps 5. Above the damage B are cylindrical ring 2, United by a plate 6 with the formation of hollow glass, fixed by means of fixing elements 3. The gap between the container and the glass sealed flexible cuff 4, attached by clamps 5. In the cylinder is directly on the damage on the body of the container 1.Other advantages of this method are saving sealing compositions.Other technical and economic advantages of the method include the reduction of the duration of the process of liquidation of emergency situations and providing transportation without the involvement of the supporting container of special devices due to the presence in the device separation ring functioning as supporting elements of the container.The possibility of industrial implementation of the method is confirmed by the following example of a particular implementation.Example 1.When implementing the method in laboratory conditions selected layout 1 simulating a damaged container with a radioactive substance, which is a metal cylinder with a length of 50 cm and a diameter of 20 cm On the model simulates the damage in the form of holes with a diameter of 15 mm on a side and end surfaces of the layout. Over the damaged area layout 1 set of detachable metal cylindrical ring 2, consisting of two semicircles with full overlap the damaged area of the layout container. A cylindrical ring has threaded holes, in which davinciaudio A with the formation of the sealing cavity, providing a uniform gap between the walls layout 1 and a cylindrical ring 2. The gap between the cylindrical ring 2 and the layout 1 hermetically covered flexible cuffs 4, made of rubber stamps IRP-158. The tightness of the connection of a flexible cuffs 4 with a cylindrical ring 2 and with the model 1 is ensured by means of special clamps 5. A cylindrical ring 2 drilled holes for introducing the sealing composition and output of air, and their overlap is ensured by the use of special caps 7 made of metal wire.In case there should be no contact between the sealing composition and the contents of the container, on the damaged surface of the container, prior to installation on her ring 2 is applied to the sleeve 8, the edges of which are sealed with clamps 5.For emergency sealing of damage on the ends and adjacent parts of the side surface of the container to the cylindrical ring 2 is attached to a solid bottom 6. The ring 2 and the plate 6 form a glass by means of the clamping screw 3 is fixed on the surface layout 1. The gap between the surface of the glass and the surface layout is sealed by mange is based oligomers polyether and isocyanate. In terms of this example uses the composition of the following composition (wt.h.):
simple polyester brand Laprol 805 - 95
polyester brand Lupranol 294 - 5
foam controller silicone cap-2 - 0,5
the polyisocyanate grade B - 130
Pre-prepared mixture of polyethers and surfactants. The mixture of components is carried out by hand for 2 minutes under normal conditions.To a mixture of polyethers and surfactant is added to the polyisocyanate and the composition is mixed by hand for 20 seconds.Immediately after mixing, the composition is injected into the sealing cavity and hardens in 5-10 minutes under normal conditions.Used in the proposed method, the device can be mounted on the damaged container at the scene, including, and in the field. After filling in the cavity of the device sealing compositions and curing a damaged container may be transported to the place of burial or disposal contained therein, with the outer surfaces of the ring 2 can perform the function of a reference surface during transportation of the container.subject to the way the container, these must be removed from the container, the proposed device can be easily disassembled. For this, remove the clamps 5, cut and remove the cuff 4, disassemble the connection of the bottom 6 with the ring 2 and remove the bottom 6 of the container 1, to disassemble the connection semirings between them and remove them from the container, then remove from the surface of the container sealing composition.Thus, the practical realization of the proposed method confirmed the possibility of reaching a new technical result: increase of ecological safety, reliability and efficiency of sealing damage of containers with hazardous materials, saving of raw materials due to the localization of the sealing zone to provide the opportunity for subsequent transport and disassembly of the container, enabling ease of disassembly used in the method of the device by performing the cylindrical split ring, eliminating the possibility of unauthorized chemical interaction sealing liquid transported materials. 1. The way emergency seal damage in containers with hazardous materials, which consists in prelego curing, characterized in that before the introduction of the sealing composition at the sites of damage in the surrounding area advanced form local volumes through device containing a restrictive element made of composite of rigid and flexible restrictive elements, and as a restrictive element using a cylindrical ring covering the container for forming, in the case of the location of the damage on the side surface of the container in which you have through holes to fill, sealing compositions and output air with the possibility of overlap, and/or cylindrical ring is further provided with United with him in the bottom with the formation of the items in the form of a hollow Cup, covering the container with the ends with the possibility of complete overlap of all damaged if the damage to the ends of the container, the cylindrical ring sets over the damage zone with a gap relative to the container by means of the fixing elements, and the gap overlapping the flexible limiting elements on the outer edges of the cylindrical ring, hermetically connected to one side with a cylindrical ring, brasoveanu cavity and damage the sealing composition.2. The method according to p. 1, characterized in that as sealing compositions used foaming composition of cold hardening on the basis of a mixture of polyether oligomers and isocyanate.3. The method according to p. 1, characterized in that is used in the way that the device for the formation of a local volume of a cylindrical ring, covering the container for forming, is made detachable.4. The method according to p. 1, characterized in that is used in the way the device is flexible restrictive elements compresses with clamps.
FIELD: method and composition for production of oligoester polyisocyanate useful as component of polyurethane compositions.
SUBSTANCE: invention relates to method for production of oligoester polyisocyanate treated with toluylenediisocyanate. Method includes controlling of NCO-group content up to predetermined value followed by addition of low molecular polyethylene. Oligoester polyisocyanate of present invention is useful as component of polyurethane compositions for production of cold cured articles.
EFFECT: reaction mass with increased viability for long storage time.
6 ex, 1 dwg
FIELD: polyurethane composition based on oligoester polyisocyanate.
SUBSTANCE: claimed composition contains (mass parts): mixture of low molecular oligooxyethylene glycol and oligooxypropylenetriol 49.0-91.2; toluylenediisocyanate 8.0-40.5; dimethyl dichlorosilane 0.1-1.0; and low molecular polyethylene 2.5-11.5, wherein polyethylene is introduced when content of isocyanate group NCO- is achieved of predetermined value (2.0-10.5 mass %).
EFFECT: oligoester polyisocyanate with stable characteristics under long-term (up to 6 months) storage.
6 ex, 1 dwg
FIELD: organic chemistry, in particular polyol composition for cold-cured polyurethane production.
SUBSTANCE: claimed composition contains (pts mass): polyethertriol or mixture of polyethertriol with molecular weight of 4500-6500 and average hydroxyl functionality of 3 - 100; ethylene glycol - 3.5-6.2; 1-4-butandiol - 3,5-8,0; triethylene diamine - 0.53-0.65; water - 0.25-0.50; organosilicate foam regulator - 0.002-0.004; and high boiling by-product from isoprene production based on alkyl- and oxyalkyl-substituted dioxacyclanes (e.g., 1,3-dioxane containing 1-4 mass % of hydroxyl groups) as organic filler - 2-100. Said filler may be used in mixture with oil plasticizer. Polyurethane obtained according to present method has Shore A hardness of 20-50, and is useful in automobile industry, and as material for gasket and sealing.
EFFECT: composition for production of polyurethane with increased hardness.
2 cl, 1 tbl, 3 ex
FIELD: chemical industry; production of polymeric structural materials from hermosetting compositions based on polyisocyanurates.
SUBSTANCE: the invention is pertaining to the field of chemical industry, in particular, to production of polymeric structural materials from thermosetting compositions based on polyisocyanurates. The offered composition for production of the polymeric structural materials contains 100 mass % of a low-molecular quick-tenacious polymer with the terminal hydroxyl groups, 22.5-400 mass % of aromatic diisocyanate, 0.08-20 mass % of dimethylbenzylamine, 0.8-20 mass % of epoxydiane resins, 55-30 mass % of acetone, 2.0-22.5 mass % of a high-porous polymeric filler. At that in the capacity of the indicated polymeric filler they use a flexible polyurethane foam or a synthetic felt material (sintepone - synthetic winterizer). From the indicated composition by an industrial method for a short cycle of hot pressing produce polymeric items with a gradient modulus of elasticity (in any given direction) from 3 up to 2000 MPa. At that the material saves its elastic properties at any value of the modulus in the interval of temperatures from -50 up to 120°C, and may be used in shoe industry and tire industry, instrument-making industry and radio industry.
EFFECT: the invention allows to produce polymeric items with a gradient modulus of elasticity in any given direction within 3 up to 2000 Mpa, the material saves its elastic properties at any value of the modulus at temperatures of -50 °C up to 120°C.
3 cl, 5 ex, 1 tbl
FIELD: production of polyurethane-bitumen composition for encapsulants, hydraulic insulating and anticorrosion insulating coats for various surfaces (concrete, metal, etc).
SUBSTANCE: claimed composition contains (mass %): bitumen/shale mastic 70-95; prepolymer mixture 5-30. Said prepolymer mixture is based on polyoxypropylenetriols and isocyanate component, wherein the first prepolymer is based on mixture of polyoxypropylenetriols with molecular mass of 300-6000 and toluylenediisocyanate in ratio of (80-85):(20-15), respectively, and the second one is based on mixture of polyoxypropylenetriols with molecular mass of 300-6000 and hexamethylenediisocyanate in ratio of (65-80):(50-20), respectively, and mass ration of the first and second prepolymers in mixture is (80-50):(50-20).
EFFECT: material with increased elongation, tensile strength, decreased water adsorption, attrition, controllable coat hardness and elasticity.
7 ex, 1 tbl
FIELD: polymers, glues.
SUBSTANCE: invention relates to thermoplastic plastics, in particular, to polyurethane and composition containing thereof used for gluing and thickening. Invention describes polyurethane prepared by interaction of: a) polyisocyanate or mixture of two or more polyisocyanates with b) polyol or mixture of two or more polyols comprising simple polyether with molecular mass 4000 Da, not less, polydispersity value 1.5, not above, or hydroxyl functionality from 1.8 to 2.0, or polydispersity value 1.5, not above, and hydroxyl functionality from 1.8 to 2.0, or by a mixture of two or more such simple polyethers in the presence of a component of the general formula (I) given in the appendix 1. After reaction termination polyurethane has at least one silane group able to react with water or its mixture with isocyanate group. Also, invention describes a composition used for thickening and gluing containing a plasticizing agent in mixture with indicated polyurethane and other polyurethane with molecular mass 8000 Da, not above, and at least by 3000 Da less as compared with this value for the first indicated polyurethane. Proposed compositions comprising the claimed polyurethane are useful as contact, single- or two-component glue, thickening mass with rupture elongation up to 287% and destroying charge up to 0.49 N/mm2 and used in sealing seams and surfaces.
EFFECT: valuable properties of composition.
15 cl, 2 ex
FIELD: polymers, building materials.
SUBSTANCE: invention relates to a method for preparing colored monolith constructional materials based on polyisocyanurates. Invention describes a composition used in preparing polymeric material with assigned modulus of elasticity comprising 100 mas. p. p. of polypropylene glycol of molecular mass 2200 Da, 21.5-117.5 mas. p. p. of aromatic diisocyanate and 3.2-6.0 mas. p. p. of dye sudan blue G as a catalyst. Material prepared on the base of the claimed composition possesses the value of modulus of elasticity at the level 1505 MPa. This allow its using in shoe and tire industry.
EFFECT: improved preparing method, valuable properties of composition.
1 cl, 1 tbl, 3 ex
FIELD: polymer materials.
SUBSTANCE: invention relates to polyurethane elastomers suited to manufacture polyurethane articles. Composition according to invention contains (i) 70.6-74.8% polyfurite urethane prepolymer prepared by reaction between 2.1 mile 2,4-tolylenediisocyanate and 1.0 mole poly(oxytetramethylene glycol) with molecular weight 1500 and (ii) liquid curing agent (to 100%), which is a mixture of 3,3'-dichloro-4,4'-diaminodiphenylmethane and poly(oxytetramethylene glycol) with molecular weight 1000 at their molar ratio 1:1. Thus obtained polyurethane elastomers show Shore hardness al a level of 93 relative units, breaking point (23°C) at a level of 38 MPa, elongation on fracture 712%, and abrasion resistance 27 mcm (according to Russian standard GOST 11529-86). Articles manufactured from these elastomers may find use for in-tube flaw inspection of oil and gas mains as well as oil storage tanks.
EFFECT: enlarged assortment of industrially useful elastomers.
4 tbl, 6 ex
FIELD: polymer materials.
SUBSTANCE: invention relates to matrix resin composition for carbon fiber-reinforced plastic capable of acquiring desired shape. Composition contains bifunctional or trifunctional liquid diisocyanate, bifunctional polyol, and bifunctional chain elongator containing group with active hydrogen atom at molar ratio of functional groups of diisocyanate, polyol, and elongator (5.0-1.0):1.0:(4.0-0.2), respectively. Method of preparing carbon fiber-reinforced plastic is also claimed. Invention related to shape-memory composite materials and can be used in space engineering.
EFFECT: enlarged assortment of shape-memory plastics.
4 cl, 3 tbl, 3 ex