DE2014296A1 - Composite thermal insulation and protective coating - Google Patents

Description

1) Amchem Products, Inc · (Prio 28 March 1969 Ambler, Penna.A.St.A. ^U « ^s - ^{8U 29} ° ' ^Cas *

. 3812 - 6894)

2) SoX. du Pont de Nemours
and Company

Wilmington, DelA "St.A" Hamburg, 23 March 1970

Composite thermal insulation and protective coating

The present invention relates to a composite thermal insulation and protective coating for Storage containers, processing equipment, pipes, lines and the like, which are used below for the sake of simplicity all referred to as containers.

For thermal insulation of containers and oil vessels it is known to use composite insulation, made up of several layers of an insulating material and one or more protective layers exist. The thermal Insulation consists of a fibrous or cellular shape Material with low heat transfer properties air or gas filled cavities and heat reflecting Surfaces that retard heat transfer * such as Glass fibers, sollformige Glastell ©, plastic paints and Caloiumsillkatblocks. Thermal insulation materials are generally preformed in block form or in sections and

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Due to the low strength of the materials used, have to use tapes or duroh other mechanical Fasteners are attached. In addition, the materials have the properties required for thermal insulation not sufficiently resistant to weather and other environmental influences « so that to connect the joints of these insulating panels or blocks on the outer surface of the thermal insulating layer, a continuous coating must be applied, the also prevents the insulating material from falling apart. Mastlx coatings exist for thermal insulation from a film-forming mixture that can be applied and cured as a thick coat of more than 0.75 mm and a flexible continuous PiIm on the surface of the insulating material forms »whereby these layers are usually sprayed on or sprayed on Mastic itself is a self-adhesive material, but usually does not adhere strongly to the insulating material, since the latter hardly shows adequate cohesion. As a result, it is customary to have «a layer of reinforcement» to attach a membrane between the insulating material and the mast lining · The reinforcement consists of a woven, knitted or non-woven fabric on the insulation is made of an adhesive base layer Mastic attached and then into the damp adhesive

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is embedded, whereupon an additional layer of mastics is applied is applied to keep the mastic in place throughout and sufficient strength ^ continuity and impact resistance dea ssusassaengesetEten Isoliererschutsübersages to reach"

According to the invention, however, a combined thermal insulation and protective layer is proposed * to cover containers and the like * the sm? from «tar inner m

Layer of thermal insulation material ^ an outer layer consists of continuous synthetic elastomer weather-resistant PiIm and adheres to it, and au3 with spaced apart bands, which are arranged between the two layers, so that the one surface of each of the bands ειη öer inner layer and. the other surface is embedded in the aforementioned exterior is, if the vessel to be covered has a diameter of 122 cm or less, imd additionally a

■ - i

Second set of spaced-apart bands - on the outer surface of the outer surface of the aniiaftea and in which they are partially embedded if the vessel to be covered has a diameter of more than 122 cm, _etc.

The coating according to the invention thus eliminates the Need a layer of reinforcement material

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to be provided, since the layer made of the elastomeric material v (»i alone is strong enough and can maintain its position in vessels with a diameter of 122 cm or less or, otherwise cVjsreb. the rare i'at: '. bands in their?

Location f ». J "- ^ 1 · '·' · ■ &"> ■ '■ -. "- !, 3>: lo Λη' ^ - 'λτΨΛί.;!:'-"ir-; · £ \ ϊ: 3 best α ^1. ? ο ■ Γ-ΛϊΚί., ■ · -. ■ ': -: i ■ - · -.Mrg .7 ^ a' ic! Vr ,. die oli: 5; p: .ii ^^. ". '; nhf :: r

£ -: *. \ Öt: '■■ - j- ·'.: R.'o "! .Τ .-. Ά oi.nra.ch r.; I.i: al; rIngen υηά better is »

In folpöttdesn should dio Erfinutnip · avil.and of drawings explained in more detail.'Iutert v? ei "ue.ni es nfciteas

Pig. 1. · »a p © / '.' 3pektlv? .Seho tei..lv? Eise

Darstalluiig a C'erassos with a known one

Insulation;
mk fig.? - öi-: £ ⁴ appended according to Fig. 1, but with

fii. itxngsEesäßer insulationi FIg,>? Lsö plan view of an iso-

• '· / .. Ί'ϊΐ ". Was the vessel?

F- &': ί1 ^Λ ? Alinitt through e: lne inventive equipment

ε- ΐΐΐίί ui! i _j; consisting of a thermal

" ^ i ^ i RchutsUberzug and a construction of-

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Pig. 5 - a perspective and partially cut View of a drill insulated according to the invention; Pig. 6 - a cross section through the hollow? according to Pig. 5 ·

The container shown in Pig * 1 with an insulating and Protective layer according to the prior art such as BlÖoke or Plates 12 made of a thermal insulating material, * di © an lie against the vessel wall il and to this & r by ligaments Ij5 · The entire thermal insulation layer is covered with a reinforcing fabric 14, which In the mastic layer 15 is embedded »This reinforcing fabric 14 is in such insulation because of the low cohesion strength of the thermally insulating Material required because the insulating material adhered poorly to the mastic layer. The fabric 14 is not only valid but serves as a suitable sub-layer for the mastic also for bridging and preventing separation of the mastic layer at the connection points of the thermal insulation in the case of thermal contraction Isolierfolöckeu

Pig * 2 selgt a® thermal insulation ■ according to the invention, "in which the reinforcement has been omitted ©" is "without having to give up its advantages and where still further advantages have been seen", Iu Figo 2

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dl «Vessel wall 21 covered with a thermal insulating layer 22 made of blocks of a thermal insulating material, which has been fixed to the vessel by circumferential bands 2jS, with the ends of the.» Bonders are connected to one another by means of Ub-high fastening means, such as, for example, clips 24. The entire layer of thermal insulation material is encased in a continuous flexible or pliable mastic layer 25 in which the inner blinds are embedded; The mastlxsohicht 25 is held by a second outer system of circumferential bands 26, which are generally spaced apart from one another and in the middle of the internal trade 23, so that a further holding of the thermal insulating layer 22 is made possible. The / mßon tapes 26 adhere to the mastic: Uber2us and are preferably partially embedded in this so that the tapes in the cutest; recorded at regular intervals.

The thermal insulating layer 22 consists of a conventional insulating material, which is generally available in block form in standardized sizes or in preformed sections. These blocks or shaped sections are attached to an insulating furnace or pipe in the usual way, for example with a temporary adhesive or old detail fixing device, such as tenons made of molded material, all of which are connected to dew OefH3

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Or attached to the line with strips of strips of metal, plastic, fabric or the like that are separated from each other, 'Bi © -use of BSndera is srfopöerli © h because of the low strength of the -usbiöhe & i? id "stFieiii insulating materials « Derartig® Werkstoffe hsübm. jsdolät- Al® mechanical properties * -the "iaa permanent Attachment- on the surface rait Klebstoffen.- octsr msßteiisehen Bei'es * - m supply medium * vmä such as screws. alike allow. . ~ It is through this satigical mechanical * fig · it · it is. _: also difficult, permanent adhesion swischön desj. • fcherailschen insulating material and d ©? look like Sohutsschich'c! mastic and for this reason it was necessary up to a long time * to provide a layer of vision aiis.eineai tissue. However, with the arrangement according to the invention, it was found that the mastic layer 25 directly on the layer of the thermal Isolieruiig applied

- m

can be. The Mastixmisfihtuig that gewöhnlieh- film-forming from eineia ^w Polymoren is'"which la Viassar or in.einem organic solvent is disperglert ₉ nnä ■■ medium the still other conventional ingredients such as pigments, binders, contains fillers and plasticizers;., Supra. that a® semi-liquid coating aasse with. A high solids content was formed by ₉ kaiin. the thermal insulation Mife olner liaSschieJiftdlste® won O _5, 5 are applied to 1.27 "ad preferably 0 * 76 raa"

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Can also use thicker coatings up to 1.78 to 2. C mm can be applied when the insulating material is sufficiently strong or in other cases the mastic layers can be applied can be applied in several layers.

A preferred mastic for use according to the invention has the following composition:
_ Mixture A

a) an ethylene / vinyl acetate ^ Misöhpolymerlsat in one

Concentration from 24 to 38

b) a plasticizer in a concentration of 1/2 to 3 parts by weight or 0.015 to 0.125 parts by weight per part by weight Ethylene Alnylacetatj

c) a coalescing agent in a concentration of 0.5 to 2.5 parts by weight or 0.013 to 0.1 part by weight Per part by weight of ethylene / vinyl acetate;

d) a surfactant in a concentration of 0.5 to

2.0 weight positions or 0.013 to 0.03 weight positions per weight position Ethylene / vinyl acetate at j

e) Pigments and fillers in a concentration of 25 to 45 parts by weight or 0.65 to 2.0 parts by weight each Part of ethylene ainylaoetati

f) water in a concentration of at least 20 to 35% by weight or 0.5 to 1.5 fluted parts per part Ethylene / vinyl acetate,

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where the concentration of all constituents amounts to a total of 100 Gmto $

Suitable masties of this type are, for example, under the HaadelsbesQielKiuns "Foster- Q]? Bf and" Foster.Monolar MaStix "from the Benjamin Foster Company * one of the" companies "Amchasn Products" Ine "" Ambler * Pennsylvania ^ V.St »A" driven out.,

The mastic is usually sprayed on or peeled on in the desired layer "-"<thick. After application of the mastic in the desired "thickness and sufficient hardness of the material layer, this is done with. approaching outer tapes 26, which have a corresponding distance from each other «bandaged in a similar way to how the thermal insulating material was otherwise connected. The composite thermal insulation formed in this way results in a protective layer with high adhesive strength, i.e. resistance to tensile pressure, peeling, impact, separation or layering and of excellent weather resistance, for example, the insulation produced in this way can be used for 1,000 hours without difficulty "carbonaro Weather-Ometer-Klimagöräfc ¹ *. If necessary, strong adhesive strips with an adhesive that responds to pressure and with fiber reinforcement can be used over the connection points

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be attached ^one load-exposed areas in the insulation or other * a "* ^ where tearing call awaits the coating kOrmfce, such as in irregular goforratsn containers"? o sin tearing oclsz by the shape of the insulated vessel "A <e Rohres or combinations of the two can be caused ©.

For pipes and vessels elnerc flow NSIT «; * ¹ of less al" about 122 a is the enveloping Maatlxaohicht sufficiently self-supporting, so that the look belts 26 are unnecessary and, if necessary, of these * vessels or tubes with less than 122 cm diameter x lie allowed can.

Pig x 5 shows the Bandaglerung to dan ends of a cylindrical vessel or a conical or spherical vessel · A small ring of 3 * ainem Jnnsnbandmatei'lal is at the respective ends of radial strips y> of the Innenbandmaterial3 fixed, while the other to a Eiiden circumferential inner band are attached at a distance, as shown in FIG. 2 in the upper area of the vessel. Sin system of outer bands, consisting of an annular band 33 and radial bands J> h, is arranged in a similar manner on the outer surface of the mastic layer. The use of similar bandages for kugel.-

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shaped® vessels are obvious to the expert. Bar spacing of the inner and look bands, r-iohtet in general according to the intensity de :? Weather conditions and environmental conditions, which the "coating is exposed $ generally has been found that the .Innen'bänder a distance of 20 to 4f5 era mid AussenbMnder the era may have a distance of 45 to 61 ·

Fig. 4 shows a section through © Ina composite thermal insulation with protective layer according to the invention, the wall 41 - of the vessel * pipe or the like ' ¹ , covered with a thermal -insulation- 4 £ ₁ , which is preferably made of an ordinary industrial insulating material a flexible, thermally insulating cellular material, file CalciuiBslllkat, fiberglass, polyurethane or polystyrene. An inner circumferential band 43 made of metal such as steel or an alloy, made of plastic made of metal coated with plastic or other material is shown in cross section. Metal bands are usually preferred. The inner band 43 can be of various widths and thicknesses, although it is generally 0.38 to 0.76 mm thick and 1.3 to 2.3 atm wide. The circumferential bonders 43, which are arranged at a distance, are embedded in a flexible polymeric outer layer which adheres to the inner sleeve 42 of the thermal insulation. The flexible polymeric coating is

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a hardened mastic film. Suitable ti mast io there are like commercial products mentioned above such as "Sealfas, OPM and Monolar Mastix". Any other mast Ucral solution with sufficient PlieSfestigUelt or wet strength. which the application of layers of 0, J> 8 now Biclce or allowed more and hardened to a self-supporting film can, whose index for the T greater than 500 million erg / 6.45 om "is, can also be used. The mastic coating should also be weatherproof against rain, hail, snow, wind and temperature differences and solar radiation, must not crack, peel, become brittle or blasan or see other catfish decompose. Furthermore the coating should have sufficient impact resistance and should be resistant to industrial chemicals such as acids, alkali, salts and their vapors and should also be fireproof · A typical mastic mixture consists essentially of a polymeric emulsion in water or in a solution in an organic solvent, a Plasticizers, a surfactant, a coalescing agent, pigments, Fillers, fire retardants, foam inhibitors, Soaking agents, thickeners and the like.

Particularly preferred «loaded fattening mixes based on water Emulsions of a ethylene / vinyl acetate copolymer.

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The outer band 45 * which 1st gebalgt in cross-section, is preferably made of plastic. · Bsi a Z "training is Außerifoand 45 at least partially in 'mentioned 44 -eingedrückt" Like the polymeric BesGhiohtung, the outer band must not nient .vorhanden' be wean the The diameter of the container or the pipe is less than 122 cm . In any case, however, the entire insulation and the outer coating are kept firmly in contact with the outer wall and adapts to every movement of the container wall, which serves as a supporting surface, without tearing the outer door Metal, coated with plastic © Ifetallatralfan, metal coated with fabric, woven »strips or coated fabric are used» ^ Dia Außenbaüüadar 45. ' have in general the same properties as the inner straps 43, although' plastics in general, for-the outer straps preferred

The composite coating according to the invention can be much easier to repair than the previous isolations "If tears open the MastlxbescMchtung or peel and the continuous coating Cancels the coating can be repaired easily and without difficulty, by applying to usual manner mastic, for example by the damaged Place newly filled.

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The mastic hardens well and forms a® bond with the original coating, 30 that left shock-resistant Isolation returns to its original form «

5 shows an insulation according to the invention on a metal pipe.As in Pig.2, the incised part of the pipe wall 5I * shows the inner layer made of preformed sections made of thermal insulating material 52, circumferential inner strips 53 *, a continuous outer layer made of mastic f> 4 and outer Tapes 55. If necessary, the individual pipe parts can be prefabricated with the insulating material "before the pipes are Kusanuiien". 5 is saturated; so that a uniform or continuous outer mastic layer is obtained, a circumferential strip of a woven tape 57 is applied in order to reinforce the coating at the insulating joint . PIg. 6 shows a cross section of the insulated pipe, consisting of the pipe wall 51, the insulating layer 52 and the metal base 54.

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Claims (1)

Godfather η t a η s ρ r ü e h e (A combined thermal insulation and protective layer for the covering of containers, characterized in that the insulation consists only of an inner layer of a thermal insulation material (42) and an outer layer (44) of a continuous synthetic elastomeric weather-resistant layer which adheres to the surface and several spaced-apart bands (4jJ), which lie between these two layers, so that one surface of these bands lies on the inner layer and the other surface is embedded in the outer layer, provided that the insulating vessel has a diameter of 122 cm or less and that a second set of tapes (45) arranged at a distance from one another is additionally provided, dl adhere to the outer surface of the outer layer and m are partially embedded in this if that is to be isolated Vessel more than 122 cm in diameter Has. ■ 2 #. Insulation according to claim 1, characterized in that the interior layer made from blocks of a thermal insulating material consists, which corresponds to the shape of the to be isolated The vessel are preformed. 0 Q 9 8 3 9/160 5 BAD ORiOtNAL 20H296 2, insulation according to claim 1 to 2, characterized in that that the outer layer is a mastic coating. 4. Insulation according to claim 3> characterized in that the mastic consists of a forming polymer, that is dispersed in water or an organic solvent with other common additives, 5 · Insulation according to claim 4, characterized in that the film-forming polymer has the composition of mixture A. 6. Insulation according to claim J5 to 5 * characterized in that that the outer layer of mastic has a wall thickness of 0.38 to 2.0 mra and preferably from 0.38 to 1.27 mm. 7. Insulation according to claim 6, characterized in that the wall thickness is 0.76 ram. 8. Isolation according to claim 1 to 7 in Korabination and as Cover for a container, 009839/1605 BATH ORIGINAL 9. A method for producing a composite thermal insulation and protective layer on a container, characterized in that one attaches its layer of insulating material to the outer wall of the container with a first set of circumferential and spaced inner foander, a continuous flexible outer ^f iterzug from a. Applying mastic mixture, which consists essentially of a semi-liquid coating compound, which contains a synthetic, weather-resistant elastomer, so that the thermal insulation layer is completely enveloped and, on. .This adheres and that one embeds this first set of tapes, the mastic layer cures by evaporation of the volatile solvent or water in the coating and at least part of the elastomer cures to form an envelope of a flexible and Kompregslblen elastomeric, weather-resistant protective coating and that one then secures this protective cover with a second set of circumferential outer bands, which are generally spaced between the bands of the first set and which are partially pressed into the outer protective layer, ue: wy ■ ■■; - .. "'■" 0098 39/16 05 BADORIQINAL