DE2014296B2 - COMPOSITE THERMAL INSULATION AND PROTECTIVE COATING - Google Patents

Description

2014 290 γ
3 4

this first layer a reinforcing membrane on thermal insulation material (22, 42) and the outer layer this first layer and then a (25, 44) are arranged so that the outer surface of the second layer of the mastic was applied. The tape applied directly to the outer layer (25, 44) of the outer protective layer was therefore embedded, while the remaining areas always consist of at least three work steps, namely 5 inner layers, provided that the one to be insulated was the application of the first mastic coating to the vessel Diameter of 122 cm or less, the thermal insulation material, the insertion of the reinforcement, and that in addition a second set of strips (26, 45) arranged with a bevel membrane and further uprighting one another carry the mastic coating. The hitherto used is provided that are adhered to the outer surface of the outer reinforcement membranes in the general layer (25, 44) and are partly embedded in this one made of a woven, knitted band, if the vessel to be insulated is a textile material or non-woven which has a continuous diameter of more than 122 cm.
Surprisingly, it has now been found that the container or the pipes are wrapped and, when certain external coatings are used, this coating is then embedded in the second, moist mastic coating in a single operation to ensure sufficient strength - and without using a continuous interval, to achieve continuity and impact resistance of the interlayer made of a textile, glass or metal mat. In addition to rial production, instead of the reinforcing membrane in textile materials and fabrics made of glass fibers as the intermediate layer, the coating material was sometimes also used continuously with several ribbons arranged in a nuanced fine mesh for reinforcement spacing, such as reinforcement It will be seen from the EEUA hand that these tapes adhere to the thermal insulation material with the inner layer book No. 12, 1963, Thermal Insulation of Pipes and, with the Vessels, and the manual by Allen C. Wilson, the outer surface directly into the surface on it Industrial Thermal Insulation to be applied, 1959, results. All »5 layers of mastic are embedded. In the case of larger known previous coating techniques for holders or pipe diameters, a further combined thermal insulation is, however, in common - set of spaced-apart braces that the use of reinforcement is always inserted into the mastic layer in such a way that only the membranes are recommended as a Adequate one side of the tapes to the outer layer adheres cohesion only when using a continuous 30 or is partially embedded in this.
borrowed reinforcement membrane as an intermediate layer The coating according to the invention was eliminated as possible, because with the stronger thus the need to provide a layer from a processing of the layers against each other by reinforcing material, since the layer from, for example, different heat radiation or the elastomeric material of alkine strong is enough in the case of greater mechanical stress with cracks or 35 and their position in vessels with a diametrical fracture formation in the outer layer was expected. water of 122 cm or less or

The invention is based on the object that otherwise by the second set of tapes in their position

known combined insulation is behaved in this way. The outer layer will look best

better that a continuous intermediate layer of a mastic mixture is formed, which is a synthetic

becomes superfluous. 40 contains weather-resistant elastomer, which is a

To solve the problem, a combined good durability, flexibility, impact resistance,

Has thermal insulation and protective layer for the long service life and is easy to apply

Covering of containers, consisting of an interior and a repair.

layer of a thermal insulation material (22, 42) and a In the following the invention is based on

continuous outer layer (25, 44) are explained in more detail from a 45 drawings. It shows

synthetic elastomeric, weather-resistant work- F i g. 1 a perspective partially broken away

substance with the following known composition Chene representation of a vessel with a known

a) an ethylene / vinyl; tcetate copolymer in ^ fe ^ 'a view according to Fig. 1, but with a concentration of 24 to 38 weight ^ _{invention sgern} äßer insulation,

percent, F i g. 3 is a plan view of an according to the invention

b) a plasticizer in a concentration of an isolated storage vessel,

0.5 to 3 percent by weight, FIG. 4 a partial section through 3 an inventive

c) a coalescing agent in a concentration ^{according to} . ^e insulation,? f _t ^hen . ^{d of} thermal from 0.5 to 2.5 percent by weight, 55 insulation, a protective cover and a tape

arrangement,

d) a surfactant in a concentration of 0.5 to F i g. 5 a perspective and partially ge-2.0 Weight percent, cross-sectional view of an isolated according to the invention

e) Pigments and fillers in a concentrate tube,

tion of 25 to 45 percent by weight, ^6o Fig. 6 shows a cross section through the pipe according to

Fie 5

f) water in a concentration of at least g _et \ _{n Fi Λ geze} ig _te container with an insulation 20 to 35 weight percent, _{and protective Chic} prior ht according to the Tecknik has

wherein the thermal insulation material optionally by blocks or plates 12 from a thermal isomechanical Devices on the container, which bear against the vessel wall 11 and can be fixed, proposed, which are thereby held on this by straps 13. the is indicated that at a distance from one another, the entire thermal insulating layer is marked with a arranged tapes (23, 43) covered between the layer of reinforcing fabric 14, which is in the

Maslixschicht 15 is embedded. This reinforcement fabric 14 is thermally insulating in such insulation because of the low cohesive strength Material required, as the insulating material does not adhere well to the MaEtixschichl. The fabric 14 is not only considered a suitable sub-layer for the mastic, but also serves to bridge and to prevent separation of the mastic layer at the connection points of the thermal Isolation in the event of thermal contraction of the insulating blocks.

F i g. 2 shows a thermal insulation according to the invention, in which the reinforcement membrane is omitted has been without the advantages of having to be given up, and still with others Benefits can be achieved. In Fig. 2, the vessel wall 21 is made of a thermal insulating layer 22 Blocks of thermal insulation material covered, which are attached to the vessel by circumferential inner straps 23 are held, the ends of the straps by conventional fastening means, such as brackets 24, are connected to one another. The whole layer of thermal Insulating material is made up of a continuous pliable or pliable mastic coating 25 as envelopes in which the inner ligaments are embedded; this mastic layer 25 is through a second outer System of revolving belts 26 held, which are generally spaced from one another and in the center of the inner bands 23, so that a further holding of the thermal insulating layer 22 is made possible. The outer tapes 26 adhere to the mastic coating and are preferably partially in embedded in this so that the ligaments are held at intervals that are as uniform as possible.

The thermal insulating layer 22 consists of a conventional insulating material, which is generally in Block form is available in standardized sizes or in preformed sections. These blocks or shaped sections are attached to the vessel or pipe to be insulated in a conventional manner, for example with a temporary adhesive or with metal fasteners such as welded studs Material; they are then attached to the vessel or to the pipe with ribbons correspondingly separated strips of metal. Kurtstetoff, fabric or the like attached. The usage of tapes is necessary because of the low strength of the insulating material common industrial insulation material. Such materials do not have the mechanical properties permanent attachment to the surface with adhesives or mechanical fasteners, such as screws and the like. Due to this inadequate mechanical strength it is also difficult to achieve permanent adhesion between the thermal insulating material and the To achieve an outer protective layer of mastic, and for this reason it was previously necessary to have a Provide an intermediate layer made of a reinforcing fabric. In the arrangement according to the invention however, found that the mastic layer 25 is applied directly to the layer of thermal insulation can be. The mastic fish that is common consists of a film-forming ™ polymer. which in water or in an organic solvent dispersed, and the other common ingredients, such as pigments, binders, Contains fillers and plasticizers, so that a semi-liquid coating composition with a relatively high solids content can be applied to the usual thermal insulation with a Wet layer thickness of 0.38 to 1.27 and preferably 0.76 mm can be applied. It can also thicker coatings up to 1.78 to 2.0 mm can be applied if the insulating material is sufficient is solid, or in other cases the mastic layers can be applied in multiple layers. A preferred mastic for use according to the invention has the following composition:

Mixture A

a) an Ethylen / Vinylaceiäi-Mischpolynicrisat in a concentration of 24 to 38 percent by weight;

b) a plasticizer in a concentration of 0.5 to 3 percent by weight or 0.015 to 0.125 Parts by weight per part by weight of ethylene / vinyl acetate;

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

d) a surfactant in a concentration of 0.5 to 2.0 percent by weight or 0.013 to 0.08 parts by weight per part by weight of ethylene / vinyl acetate;

e) Pigments and fillers in a concentration of 25 to 45 percent by weight or 0.65 to 2.0 parts by weight per part of ethylene / vinyl acetate;

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

the concentration of all components making up a total of 100 percent by weight.

Suitable mastices of this type are, for example, under the trade name "Foster GPM" and "Foster Monolar Mastix" from the Benjamin Foster Company, a subsidiary of Amchcm Products, Inc., Ambler, Pennsylvania. V. St. A., distributed.

The mastic is usually sprayed or trowelled on in the desired layer thickness After applying the mastic in the desired thickness and sufficient hardening of the mastic layer is these with circumferential outer bands 26. which are at a corresponding distance from one another, bandaged in a manner similar to how the thermal insulation material was otherwise bound. The so educated composite thermal insulation gives a protective layer with high adhesive strength, i.e. H. Resistance to tensile pressure, peeling, impact, separation or layering, and excellent Weather resistance. For example, the insulation completed in this way can be used without Difficulty 1000 hours in a »carbonarc Weather-Ometer-Air Conditioner «. Possibly you can use strong adhesive strips with an adhesive that responds to pressure and with fiber-reinforced «^ but the connection points in the insulation or on other stressed areas where the coating is expected to tear such as irregularly shaped containers where tearing occurs

* 8th

The shape of the insulated vessel or pipe should give the coating sufficient shock resistance

or combinations of the two and should be produced against industrial chemicals, such as

that could. Acid, alkali, salts and their vapors, resistant

In the case of pipes and containers, it should be and should also be fireproof. A typical one

of less than about 122 cm, the enveloping mastic mixture consists essentially of one

Mastic layer sufficiently self-supporting, so that the polymeric emulsion in water or in a solution

outer bands 26 are unnecessary and, if necessary, in an organic solvent, a soft

from these vessels or tubes with less than macher, a surfactant, a coalescing agent,

122 cm in diameter can be omitted. Pigments, fillers, fire retardants, foam

F i g. 3 shows the bandaging at the ends of an io preventive agents, protective substances, thickening

cylindrical vessel or a conical center and the like.

or spherical vessel. A small ring 31 made of mastic mixtures are particularly preferred

an inner band material is based on aqueous emulsions of an ethylene / vinyl

of radial strips 32 of the inner band material be acetate copolymer.

strengthens, while the other ends to a circumferential 15 The outer band 45, which is in cross-section

of the inner band is attached at a distance from one another. is preferably made of plastic. at

are, as shown in FIG. 2 in the upper region of the vessel of a preferred embodiment is the outer band 45

is shown. A system of outer tapes, at least partially in the polymeric coating

standing from an annular band 33 and radial bands 44 pressed in. As mentioned, the outer tape must

the 34 is similarly absent on the outer surface 20 if the diameter

the mastic layer arranged. The use of a container or pipe smaller than 122 cm

licher bandages for spherical vessels lie for is. In any case, however, the entire isolation will be

the professional at hand. The spacing of the and the exterior paint firmly in contact with the

inner and outer ligaments are held in the general vessel wall and adapts to every movement

mean according to the intensity of the weather conditions as the container wall serving as the carrier surface,

and environmental influences, which the coating can do without tearing the exterior paint. For bandaging

is set; In general, it was found that the can also use other materials such as metal

Inside bands a distance of 20 to 45 cm and plastic-coated metal strips, loaded with fabric

the outer bands a distance of 45 to 61 cm layered metal, woven strips or coated

can have. 30 teter fabric can be used. The outer bands 45

4 shows a section through a thermal insulation with a protective layer, which have generally the same properties, as the inner bands 43, although plastics within the scope of the invention, the wall 41 of the vessel generally being preferred for the outer bands. Pipe or the like with thermal insulation 42. The composite coating is covered according to Erabbecks, which is from a common industrial 35 invention can be repaired much more easily than the len insulating material, preferably a flexible, previous insulation. If the mastic coating thermally insulating cellular material such as tears or flakes off and the continuous calcium silicate, fiberglass, polyurethane or poly coating breaks, the coating can be light and styrene. F. in inner circumferential band 43 can be repaired without difficulty by adding metal, such as steel or an alloy. 40 mastic is applied in the usual way, for example from plastic, from a plastic-coated way by filling the damaged area with new metal or another material, is puttied in cross-section. The mastic hardens well and forms a protruding shape. Metal tapes are usually given prior to joining the original coating, so added. The inner tape 43 can vary in width and so that the composite insulation can be restored to its thickness, although it generally assumes 0.38 to +5 original shape.

0.76 mm thick and 1.3 to 2.5 mm wide. The with F i g. 5 shows an insulation according to the invention on spaced circumferential strips 43 are a metal tube. As with F i g. 2 shows the portion cut away in a flexible polymeric outer layer 44 of the pipe wall 51, the inner layer adhering to the inner layer 42 of the thermal insulation made from preformed sections. The flexible polymer coating 50 insulating material 52, circumferential inner strips 53, one device is a hardened mastic film. Suitable continuous outer layers made of mastic 54 and slices are, as mentioned above, commercially available product strips 55. If necessary, the products such as "Sealfas, GPM and single pipe parts with the insulating material prefabricated lar mastic" can be used. Any other mastic mixture can be added before the pipes are put together. If there is sufficient flow strength or wet strength, the 55 such cases, a fitting piece is provided in the insulation application of layers of 0.38 mm thickness or layer, which allows more with the connecting part and which meets to a self-supporting of the pipe, as it can harden for example with film , the index of which for the dry 56 is shown in Fig. 5; Leann can also be used so that a uniform or strength greater than 500 million ergs / 6.45 cm * is obtained. The mastic over- Go is a circumferential strip made of a woven fabric should also be weatherproof against rain, tape 57 attached to reinforce the hail. Snow, wind, temperature differences and stratification at the insulation joint to form solar radiation must not form cracks, but should suffice. Fig. 6 shows a cross section of the insulated peeling, becoming brittle or blistering, or pipe, consisting of the pipe wall 51, of which the insulation is otherwise decomposed. In addition 65 layer 52 and the masrix layer 54.

For this purpose 2 sheets of drawings

Claims (3)

with a second set of circumferential external claims: straps (26, 45) secured with a spacing generally between the straps of the first 1. Combined thermal insulation and set (23, 43) arranged and partially in the Protective layer for covering containers, 5 outer layer (25, 44) impressed consisting of an inner layer of a thermal insulation material and a continuous outer layer made from a synthetic elastomer weather-resistant material of the following known composition " . . »,, ·",., ,,.,, - The invention relates to composite thermal a) an ÄthylenAOnylacetat-Mischpolymeri- _insulation ^ protective coatings for sat m a concentration of 24 to 38 _{storage containers} , processing plants, pipes, Leitun-Oewicntsprozent, _{gen xmd} g ^^ facilities, which in the following b) a plasticizer in a concentration 15, for reasons of simplicity, all referred to as containers of 0.5 to 3 percent by weight. c) a coalescing agent in a concentrate _ ^Z ™ thermal insulation of containers and tion of 0.5 to 2.5 percent by weight, vessels are known to contain composite Isoheron- ^v genes consisting of emer or several d) a surfactant in a concentration of « _o layers of an insulating material and one or 0.5 to 2.0 percent by weight, consist of several protective layers. Such e) Pigments and fillers in a concentration thermal barrier coating consist of materials with tration of 25 to 45 percent by weight, low thermal conductivity, mostly in block or ,,. ,,,. . . , Pre-cut aoschnittform and in order to f) Water in a concentration of at least _{a5 decent containers or pipes by means of ribbons} at least 20 to 35 percent by weight, are attached. Most used heat whereby The thermal insulation material, possibly insulation materials, have such a low mechanical strength mechanical devices on the existence cohesion or are not weather containers can be attached, so that it is necessary to draw a line over it, that spaced apart protective layers made of suitable mastices were arranged Tapes (23, 43) apply between the layer to increase the durability and life of the to improve thermal insulation material (22, 42) and the external thermal insulation. This occurs layer (25, 44) are arranged so that the problem is that the fibrous or cellular Outer surface of the bender directly into the thermal insulation material, which is often still a heat reflective outer layer (25, 44) is embedded, the surface of which adheres to the inner layer, such as areas other than glass, fibers, cellular glass parts, plastic paints provided that the vessel to be isolated has a through or calcium silicate blocks, and the diameter of 122 cm or less, and that protective layers are so firmly anchored into one another in addition, a second set of spaced-apart that the entire outer coating must mecha-tically arranged bands (26, 45) prior to stresses such as by is seen on the outer surface of the external pressure, tension or movement of individual parts of the layer (25, 44) can adhere and partially withstand each other in these insulation material sections, are embedded when the vessel to be isolated is in has a diameter of more than 122 cm. enters the outer layer. Mastic coatings for 2. Insulation according to claim 1, characterized in that the thermal insulation consists of a film forming that the outer layer is a wall-to-wall mixture, which as a thick coat of more than Thickness of 0.38 to 2.0 mm and preferably 0.75 mm can be applied and cured from 0.38 to 1.27 mm, especially from 0.76 mm, and a flexible continuous film on the owns. Surface of the insulating material forms, this 3. Process for the production of a composite 50 layers usually sprayed or spread on thermal insulation and protective cover. Mastices are self-evident according to claim 1 or 2 on a trembling material, which however does not have strong adhesion Have holder with a diameter of more than on the insulating material, since the latter hardly 122 cm, showing a layer of an iso- an adequate cohesion. The anchorage liermaterial on the outer wall of the container and on the mastices with the thermal insulation materials closing a continuous bendable exterior is of course to some extent anyway Layer with the addition mentioned in claim 1 from the stickiness of the mastic composition used applies, making the thermally-dependent, as strong, sticky mastices to a better The insulation layer is completely encased, thereby connecting with the highly porous thermal insulation characterized in that one leads a first 60 substances. Set of tapes (23, 43) in the outer layer embeds, the outer layer (25, 44) build up protective coatings in such a way that vaporizing the volatile solvent or after applying the thermal insulation materials and Water in the coating hardens and reduces the attachment to the protective parts as At least part of the elastomer is provided for environmental protection against weather and mechanical protection Covering made of a flexible and compressible mastice by spraying or troweling one on elastomeric, weather-resistant protective coating first layer of mastic on the thermal insulation materials hardened and then this protective coating was applied, that then after the "settling"