SA93140431B1 - Reinforcing system for MASTIC INTUMESCENT, fire-retardant intumescent coating materials, including a hybrid mesh fabric - Google Patents

Abstract

Abstract: The invention relates to a reinforcing system for mastic intumescent coatings used for fire prevention. A loose hybrid mesh embedded in the coating is used to strengthen it. The hybrid net is made from a combination of high and low temperature yarns.

Description

Reinforcing system for fire-protective mastic intumescent coatings incorporating a hybrid mesh fabric Full Description Scope of the Invention The invention relates generally to mastic intumescent coatings used for fire protection and more specifically to reinforcing systems for such coatings. BACKGROUND OF THE INVENTION ALY fire-retardant mastic is used to protect buildings from fire. Common use of these coatings is in Jia hydrocarbon processing facilities, chemical industry units, offshore oil and gas platforms and refineries. These coatings are also used around Jie hydrocarbon storage facilities, LPG (liquefied petrogas) tanks. (liquefied petroleum gas Le Vs) The coating material is often placed on structural steel elements where it acts as an insulating layer. In the event of (Gaga) the coating material delays the rise in the temperature of the steel, which gives additional Gi to extinguish the fire or evacuate the building. Otherwise, the steel may heat up rapidly, weaken greatly, and collapse.Mastic coatings are made with a binder such as epoxy or vinyl 1[t].Various additives are incorporated into the binder to impart the desired fire-protective properties to the coating. A particularly useful type of fire-protective mastic coating is the so-called “intumescent coating.” Intumescent coatings swell when exposed to the heat of a fire into a charred, foam-like substance. And the charred material has YY.

. Foam-like has a low thermal conductivity and serves to insulate the material. Gla intumescent coatings are also called “ablative” or “subliming” coatings. Although mastic coatings adhere well to most primers, only

0 It is not uncommon for mesh to be incorporated into coatings. The Uni ja mesh is mechanical with the base material. US Patents Nos. 7,913,758 and 5,564,078 in the name of Castle et al. Castle ef al. describe the use of the grille. In these two diel) the grille is paved as a reinforcing material for the coal as soon as it is formed in a particular fire. More precisely; The mesh reduces the chance of cracking the coating material or its “fissure”, and the cracks reduce the protection that the coating material gives, since it is

© allows heat to reach the base material very easily. And when cracks occur in the material; They are not as deep as when netting is used. As a result; The mastic paint should not be applied to the same thickness. Glass fabric has also been used to reinforce fire-retardant mastic coatings. US Patent No. VAN ONY describes such a system. However; Glass softens at temperatures to which the material may be exposed

epithelial. And as soon as the glass does not provide the desired benefits. Although JS glass is partially insulated with a fire-retardant coating, it has been recognized that insulated systems also often contain boron or other substances that are considered as glazing agents. And reduce. Fusing agents Softening point of glass stiffener. As a result; Glass does not give sufficient strength in some cases of fires to which the material may be exposed.

r. Examples of two widely used types of fiberglass are the glass-2 and glass-8 sold by Owens-Coming. Glass-8 loses 5 of its tensile strength when heated to A temperature of 767 C. Glass-9, while OLE is stronger, loses 771 of its tensile strength at the same temperature. Glass-1 and glass-8 soften when heated to a temperature of

m, SAE AVTY, respectively, in a tangible way, but when heated at SAVY 1477 m on

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They soften in a very large way so that the fibers made of these two materials cannot bear their weight. These low softening degrees are considered a disadvantage of using glass strengthening systems. The use of mesh in combination with mastic coatings has been criticized as it increases the cost of applying the material. It would be desirable to obtain the benefits of mechanically bonded wire mesh without excessive costs. 1 It has been proposed to use woven carbon fiber instead of metal mesh; But the details of such a system were not disclosed. The patent application under consideration serial number V/AAT AVY “in the name of Castle et al. (Castle et al.) mentioned in this release for reference; Detailed information on the carbon lattice. A fire protective coating system with a relatively low manufacturing cost Low installation cost Ensures good fire protection The aforementioned and other objectives are achieved by means of a mesh made of a combination of fibers Non-flammable and non-melting ALE elastic fibers with a high softening point are woven with fibers with A brief explanation of the drawings The invention will be better understood by referring to the following more detailed description and the following attached drawings where: 2 Figure 1: Shows a coating material with spun-mesh fused to it; Figure ?: Shows (Law) a schematic diagram of a woven hybrid netting (Gy) for one embodiments of the invention; the shape ? : Lewy shows a schematic of a simulated hybrid netting according to one embodiment of the invention; f shape; : Lew shows a schematic of a coated beam with hybrid grate Gy of an embodiment of the invention. YY

Detailed Description Figure 001 shows Tags 1 such as that which may be used for structural steel used in a hydrocarbon processing facility. Although it shows a column, the invention can be applied to gantry beams; secondary jizan (support slabs); vaults or other types of structural members or surfaces (is AY) such as walls; flooring; ducats; structural barriers; that need to be protected from fires. Coating 011 is applied to the exposed surfaces of column .001. Coating 017 is a well-known inflated fire ddl mastic coating. Chartek from Textron Specialty Materials, Inc. of Lowell, Massachusetts, USA is an example of one of several matching coatings. Material 01" AU has Vet hybrid mesh incorporated into it. Hybrid mesh 004 contains a non-flammable ALE flexible fibrous material that retains more than 7860 of its tensile strength at room temperature when exposed to temperatures in excess of about VEY 1s M. It is preferable that the fibrous material retain more than TAY of its strength at room temperature when exposed to temperatures exceeding 8544 C, and the best when exposed to temperatures exceeding 1701 C. Examples of suitable fibrous materials are fibers Carbon, boron, and graphite Fibers containing carbides can be used: silicon carbide or titanium carbide; such as alumina or silica 81568; or a ceramic material. The fibers can be used in the form of monofilaments, polyfilaments, flax filaments or yarns. When used as yarns, they may be continuous filament yarns or intermittent filament yarns such as Elastic, fibrous or discontinuous yarns, hereinafter referred to as "high-temperature fibres". The advantage of this fiber is high YY

temperature in its lightness and flexibility compared to welded wire mesh. In addition; They do not burn, melt, or corrode and withstand multiple environmental influences. Carbon fiber yarn is the preferred high temperature fiber. The spun carbon materials are usually made of PAN (poly acrylic nitride 0) resin fibers. Then the PAN resin fibers are slowly heated in the presence of oxygen to a relatively low temperature of about 4500 F (7777 C).This slow heating process produces what are called “oxidised fibres.” While PAN and resin fibers are relatively flammable and lose their strength relatively quickly at elevated temperatures, oxidised fibers are non-flammable and relatively inert. AT TEMPERATURES NOT EXCEEDING 701 F (VEAL) AND AT HIGH TEMPERATURES THE OXIDIZED FIBER MAY LOSE WEIGHT, BUT IT IS ACCEPTABLE FOR USE IN CERTAIN FIRE PROTECTIVE PAINTS IN CERTAIN FIRE ENVIRONMENTS. oxidized on carbon with a ratio of not less than JU and the carbon fibers are made from the oxidized fibers by a second heat treatment cycle according to known manufacturing techniques; this second heat treatment step will not be necessary in some cases because an equivalent heat treatment will occur when a fire occurs. thermal processing; The fibers will preferably contain more than 80% carbon and preferably more than 798% and the carbon GLI will be lighter, stronger and more heat or cell resistant than the source material. However, carbon is more expensive due to the additional processing required. © GUY carbonaceous loses only about 71% of its weight per hour at 200 m in air. and when incorporated into the fire-retardant coating; It will dissolve to a lesser extent as well. The hybrid mesh contains low temperature fibers. The low-temperature fibers help catch the high-temperature fibers (laa) in a negotiable mesh. It was discovered that more fibers were required to provide a negotiable mesh than was needed to supply sufficient vs. strength in the event of a fire. As a result; Low-temperature fibers are woven with YY.v high-temperature fibers. Low-temperature fibers are chosen so that they are relatively low in cost and provide good processability to the mesh. Examples of low-temperature fibers suitable in (trademark provided by DuPont include Kevlar fibers for glass fibres; Kevlar fibers for metallic fibres; organic basalt fibers; or ¢(aramid for DuPont) fibers Nylon;polyester or other synthetic fiber.Combinations of these 0 3 phyla can also be used and form Ls and glass fiber is preferred.This low cost fiber is a tradeable material.Moreover,when hybrid netting is used In puffy paint the fiberglass has a high enough softening to provide some desirable effects during the initial puffing stages.© In this case Ye Elsa tarpaulin is used and the figure shows Carbon yarn. Glass yarn

IVY is vitreous and carbonaceous, and the end result is an open tissue that includes its main cell

M, dimension 14, surrounded by high temperature fibres. The primary cell is filled with secondary cells having a dimension determined by low-temperature fibers. It is preferable that the dimension of 34, less than four (0.07284 m) inches (60101 m); and it is preferable that the dimension of 34, less than one inch

M, and most preferably about half an inch (01797.0 m). It is preferable that the size of the dimension be less than half an inch. My, and it is better that the size of the dimension (pr 00) be less than two inches (0.0005720 m). ar, 0) YY) A mesh with these interlayers ensures sufficient strength and reduces cracking when used on inflated materials. the interstitial distance is sufficiently large; To allow for easy blending into puffy paint

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It includes primary and secondary cells that are in the shape of Yet showing a hybrid mesh oY and in the form of a square. However; Cells do not have to have a square shape. The cells can be rectangular in shape, or in any shape resulting from the structure of the lattice. It includes, for example, Wot's stamen fibers; In the figure © Jad's hybrid grid shows that the main cells are not straight. Result 911 high temperature 0 0 and the secondary are rectangular in shape. It is a woven mesh that provides the advantages of resilience to the GE shackle, “04 and the hybrid mesh is easily in the direction of the stamens” 17. The expansion of the mesh is desirable when using Reinforcing material for coatings that expands to provide a bouncy, fire-retardant Laie. When the coating swells, it pushes out a thick insulation layer. When the mesh expands, it will allow the coating to swell to a greater extent and thus provide more insulation. Especially at the edges or on small objects, and this additional expansion is considered the diameter, such as tubes, where the expanded epithelial material has a surface area greater than that of the material, that cracks occur in the inflated epithelial material Tas unexpanded. At these positions, to get full benefit from the expandable mesh, it is necessary ys in the direction of the stamens 77 perpendicular to or tangential to the direction of expansion. 0 Orient the hybrid mesh so that it is around the flanged edges 1 For example, the direction of the warp is shown in Fig. 7 when the radius of the coating material increases around the flanged edges at Aig] and with this .001 of the column oll is likely to cause a fire; It will also increase the amount of reinforcement the netting creates. As a result of less cracking of the inflated coating on the flanged edges. - +” than the inflated material JH Another advantage of the inflated mesh is that an amount of fire protection is required. It has been observed that by using the grille; when cracks occur; They are not quite as deep. and in general; The cracks shall not penetrate the coating material to any depth greater than the depth of the mesh. And by using the stretchable net; The mesh moves further from the base material when the thickness between the mesh and the base material is greater. Thus Je material swells. As a result; material vs

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0 When cracks form up to the grille; Better insulates the base material. This Vo-effect is particularly important for thin coating materials; Those whose thickness is less than (arse + AAD) The installation of the hybrid grille is described in more detail. Where oF Returning now to the figure is a distinctive weave in the form of a thin weave mesh (central) 0 is the hybrid mesh; And use 060 060 yarn as the high temperature fiber (Amoco T-300) 7 001-T carbon filament Amoco type heat. Type 200150 glass yarn supplied by Owens-Corning and weft 11 were used as the low-temperature fibres. The carbon warp fibers in (pr YY) in Vy inch define the main cells that have angles spaced 1 FYE carbon© and the glass weft fibers 11 each way. The secondary cells are defined by glass warp fibers (0.0077 m) Vy in. The glass yarn fibers form squares of about YA more than squares formed (pvr TY) Vf inches, because these squares are spaced by Tk by means of carbon yarn; it is characterized along the long axes by yarns (pvr ATO) in / V inch, to form two secondary cells after which FYE carbon weft os provided (Raschel) using a knitting machine of type Rachel “04 Hybrid netting is made with a weft interlocking tool. It forms sutures extending in the direction of the stamens; 7 by knitting two glass yarns in a vertical stitch; That is, four vertical stitches per inch. These stitches are spaced ¼ inch (001785.0m) apart. Each stitch includes the other vertical stitches

PAY fr on a carbon monofilament yarn + by means of a weft interpolation tool. Weft fibers are produced in 16 inches, carbon weft fibers are added (©0.0057m). By knitting, it is meant that 1/ By making a "knitting" all the glass TIA: a yarn thread is transferred from one of the columns to the adjacent stitch.

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1 The warp threads 111b are not straight. The coiled shape of these fibers results from the fact that in stitches "17b; the tension is different in 11" as a result of including calf carbon yarn fibers. This coiled shape is desirable because it allows stretching of the net. B11 PY yarn Size calibration can be used on the hybrid grille to improve the maneuverability of the mesh.

. Referring to Figure Hay) Column Gy 001 for the following procedures: A layer of mastic intumescent coating is first placed on column .001. Lal intumescent mastic can be applied by spraying with trowel or other suitable methods. Before the epithelial (sald) matures, hybrid mesh 014 is wrapped over the surface. It is desirable to wrap grating 004 as one continuous plate around as many edges of column 001 as possible. The net is compacted

014 into the paint by using a trowel or a solvent-dipped primer or by some other suitable means.

Then an additional amount of mastic is applied. The coating material 01 is then polished as a conventional coating. Thus, the carbon lattice is "loose" (Tok) because it is not directly mechanically attached to the substrate.

1 example ve

Coat a steel tube of approximately VA inch (pr, £0VY) with a thickness of A mm intumescent fire retardant. A hybrid mesh as shown in the figure “ was embedded into the coating material at a distance of approximately mm from the tube surface. The tube was placed in an oven at a temperature of (Vary).

6 and after testing; He couldn't see the glass panes of the hybrid grille. It was found that the carbon portions of the hybrid grating are about 4 to 10 mm away from the surface of the tube. The hybrid grille's circumference has increased by approximately 0 inches (per E880) over the approximate YA Yo inch (£ »m). qualitatively; It was noted that the coating material includes fewer cracks lee than similar foundation materials that were protected with an intumescent, fire-retardant material that was

vs Reinforcing it with a metal net.

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Example? A hybrid grille as shown in the figure was incorporated into a fire-retardant inflated mastic coating material that was placed on a part of a TOWED beam. The coating material was applied with a medium thickness of © mm. The hybrid grille was embedded at a distance of ? mm from the surface at the edges. When placed in an oven preheated to 0001°F (op VAT), the average beam temperature, as measured using thermocouples integrated into the beam, was 0001°F (OVA +) after EA When the fire protection material provided with mesh of the same type with a thickness of 1 mm was coated on a second part of the beam, the time required to reach a temperature of 17 (0001 F) (OFV,A) was 17 minutes. 1 For the purpose of comparison, a beam tested in the same way without grating reached a temperature of 0001 F (OTY,A”) after “Ye min.” Although not directly compared, a column of type 1017749 was coated with a protective intumescent material. The fires are ½ inch thick (per TA) and a metal mesh is incorporated into the coating material at the flanged edges. The column is placed in an oven heated Gal to 0001 F (21047) Gy for UL VAR protocol The column reached an average temperature of 10001 F (OTV, A) C after 10 minutes. If you specify the thickness as © mm; The trajectory time will be ¢£ minutes only. Returning now to Figure cf shows an alternative hybrid grille 504 incorporated in a fire retardant coating ?4607. And as shown; The grille includes; 46 on a 5605 carbon yarn extending © in one direction only around the flanged edges of a shaft. The 465 carbon yarn is held together by #4 low temperature fibers. In this way; Reduces the amount of high temperature fibers. And describing the invention; It will become clear that other embodiments can be deduced. Different types or combinations of fibers may be used. The hybrid mesh described in this statement may also be used to reinforce fire-retardant coatings on various base materials; Overloaded cameras except

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Cabinets and ceilings. For this reason, the structural barriers should be determined (Cant). ducats; ase) and the scope of the appended claims. fae of the invention only

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Claims (1)

Protection Elements 1 1 - A mesh fabric that includes: Y { a first group of J fibers that retain an Aap percentage of Ae 7 of their tensile strength at room temperature at a VET extending in the direction of The warp and weft that define a main LDA are surrounded by the first group of fibers and have large dimensions; It has ° angles spaced in each direction by less than ; inches (10 m); w . b) a second set of fibers retaining less than 780 of their tensile strength A at room temperature at 67 ºC are interwoven with the first set of A fibers to select secondary cells of small dimensions; It has angles spaced in each direction by less than 9 inches (0 + (pr), and fills each of the aforementioned primary cells with the aforementioned secondary 0 cells, to provide a mesh fabric with suitable negotiable properties and sufficient 1” tensile strength at 77 m for its use As a reinforcing system for fire-protective mastic VY coatings. Protection ¥ where the second group of fibers includes Y glass fibers. inch [4 Y where the first group of fibers includes 1 fabric according to the element of protection -# 0 P ve ceramic fibers. Y where part of the first group of fibers has the form of 1 fabric according to For protection element 1 - 1 wrapped in the direction of the warp; it is allowed to stretch the net in the direction of the mentioned warp. Y 1 Part of the second group of fibers is woven. Cin 1 of protection element Gi Weaving -1 of Al oll netting, in fire retardant coated primer; INTEGRATED IN THE MATERIAL -" 1 FIRE CONTAINS: Y A) A FIRST SET OF FIBER RETAINING MORE THAN 780 PER TENSILE STRENGTH SPECIFIC 1 EXPANDS IN THE WARM AND WEFT DIRECTION OF THE CA VEY DETERMINED WITH THEM AT ROOM TEMPERATURE AT Main cells surrounded by the first group of fibers and of large dimensions; It has angles diverging 98° in each direction with less than ; inches 1b double group of fibers retaining less than 7860 of the specific tensile strength 7 m; interwoven with the first set of VEY out at room temperature at A fibers to select secondary cells having small dimensions; It has angles spaced in each direction by less than 3 each of the primary cells mentioned in the day (pe, 0) of the two mentioned secondary cells 0; To provide a mesh fabric with suitable malleability properties and sufficient tensile strength of 1 mastic at 767 m to be used as a reinforcing system for fire-protective mastic coatings. Primer 4-1 “subliming cintumescent coating materials which includes intumescent coatings al Y .ablative and resilient coatings al Y. 1 It additionally includes an edge coated with a protective material, A, for the element of protection, Gy, the base material, 1-01, from fires, where the grille is stretched in the first direction, and the grille is positioned so that the Y in the first direction is perpendicular to the edge. A part of the first group of Cua 01 for protection squeeze Gig Basematerial 11-1 The fibers have a coiled shape in the direction of the warp; It is allowed to stretch the mesh in the direction of the mentioned warp. Y, where the first group of fibers includes 11 for the protection element Gig base material 17 0 carbon fibers 7 Where the second group of fibers includes VY material The basis according to the element of protection 1-1 “01 glass fibers. Y, where the first group of fibers includes A. The basis material according to the element of protection 1-14 carbon fibers. Y, where the second group of fibers includes VE of the protective element Gay Base material -1#1 fiberglass. 7 F