DE102011108755A1 - Opened cell froth used for e.g. motor vehicle, has layer having specified thickness, and containing phase changing material and polymeric binder(s) - Google Patents

Abstract

An opened cell froth has a layer (A) having thickness of 2 cm or less formed on at least one side of the shaped component of open cell froth. The layer (A) is formed of phase changing material and polymeric binder(s). An independent claim is included for manufacture of open cell froth.

Description

The present invention relates to an open-celled foam, wherein at least one side of the shaped body of the open-celled foam is partially or completely modified. Furthermore, the present invention relates to a method for producing the modified on one side of the molding open-cell foam and the use of such open-cell foam, in particular as a multifunctional wall, ceiling or room element.

EP-A 1 498 680 relates to a thermal storage unit containing an open-cell foam based on a melamine / formaldehyde condensation product whose cell pores are completely or partially filled with a flowable heat transfer medium. The heat transfer medium used is a phase change material (PCM). In order to prevent the heat carrier from flowing out, the open-cell foam of the thermal storage unit is encased, for example with a film of polyolefin.

In EP-B 0 672 524 discloses a method for the production of dimensionally stable acoustic components. Melamine / formaldehyde resin open-cell foam sheets are laminated on both sides with thin, tear-resistant cover layers, with an aqueous binder suspension based on curable melamine-urea or phenolic resins being applied to the surface of the foam sheets. On this provided with the aqueous binder suspension surface is again (both sides) a cover layer of metal foils, plastic films or fiber webs launched and the resulting composite at temperatures between 50 and 250 ° C and pressures of 2 to 200 bar pressed.

In EP-B 922,563 discloses a method for the production of acoustic components, in which sheets of open-cell melamine resin foam are laminated on both sides with thin, tear-resistant cover layers. The two outer layers consist of 0.1 to 3 mm thick fiber webs, which are provided on one side with an adhesive layer of a melamine, acrylic ester or polyvinyl propionate resin, in a prefabrication step over the entire surface, strip-shaped or punctiform with a basis weight of 10 to 100 g / m ^{2 are} applied to the cover layer.

WO 2008/095931 relates to a liquid-soaked foam part consisting of 0.5 to 10% by volume of an open-cell foam based on an aminoplast and 90 to 99.5% by volume of a component which is liquid at 25 ° C. Suitable liquid components are old at 25 ° C flowable or pasty substances that are inert to the aminoplast, for example, aromatic hydrocarbons, alcohols, water or functional fluids such as an aqueous dispersion of a PCM. The open-cell foam is therefore homogeneously (completely soaked) loaded with the liquid component. These liquid-soaked foam moldings are suitable, for example, for the simultaneous transport of one or more liquid components without electrical energy, for the energy absorption of projectiles, for freeze-blasting or as latent heat storage.

US Pat. No. 6,765,031 relates to another open-cell foam which is at least 80% in composition and has an average pore size of 1-200 μm. At least 80% by volume of the open-celled foam is again occupied by PCM. An embodiment of the microporous, open-cell foam additionally comprises, in addition to the PCM, a polymeric thickener, which may be, for example, a copolymer of styrene and butadiene. Alternatively, in addition to PCM also antioxidants or a liquefied gas can be incorporated into the open-cell foam. US-B 6,675,031 Thus, discloses open-cell foams whose pores are occupied over the entire volume range of the corresponding molding with PCM.

WO 2009/077616 relates to a molded article preparable from foamable reactive resin-containing support materials which are subjected to a compression molding step. These moldings can be installed in panels. The molded parts or the panels are used in vehicle construction or as a fire protection layer. As carrier materials and open-cell foams can be used. However, these moldings contain no PCM and no polymeric binder.

The object underlying the invention is to provide novel open-cell foams which can be used as multifunctional components, for example for thermal insulation, for sound absorption and / or for indoor climate effect.

This object is achieved by an open-cell foam, characterized in that at least one side (S1) of the shaped body of the open-cell foam partially or completely with one up to 2 cm thick layer (A) is provided, wherein the layer (A) of a part of the shaped body of the open-cell foam, at least one PCM (Phase Changing Material) and at least one solidified polymeric binder is formed.

The open-cell foams according to the invention are distinguished from the corresponding foams, in which PCM is distributed over the entire or almost the entire pore volume, by improved heat conduction properties. In the open-cell foams according to the invention, therefore, only a partial region of the shaped body of the open-cell foam in the pores is occupied by PCM, the dimensions of this partial region being clearly defined on the basis of the layer thickness specification. This subarea is referred to as layer (A).

The additional presence of a solidified polymeric binder keeps the PCM in that portion of the open cell foam without the need for an additional cover sheet to prevent any liquified PCM from leaking. The remainder of the shaped body not defined by the layer (A), on the other hand, is completely or almost completely free of PCM and the solidified polymeric binder.

If the PCM is concentrated on a certain portion of the shaped body of the open-cell foam, here the layer (A), the PCM effect (heat storage) is present, but the heat diffusion values are very short compared to the complete distribution of the PCM over the entire volume a shaped body of an open-celled foam. The heat insulation through the open-cell foam thus remains unchanged in the non-PCM-loaded subregions. The open-cell foams according to the invention thus at the same time have both improved thermal insulation properties and improved heat conduction properties over corresponding foams which have no defined, PCM-laden partial area.

The open-celled foams of the invention have the additional advantage that the penetration of liquid into the pores of the open-celled foam can be controlled. If the application site and / or rate of application of the liquid to the open cell foam is controlled, the spread of the liquid to a particular portion of the shaped body of the open cell foam can be limited. Liquids can be held in the pores for a period of time without spreading down or laterally. Consequently, it is easily possible to design the open-cell foams according to the invention such that the layer (A) does not spread completely over one side of the underlying shaped body of the open-cell foam, but that the layer (A) only partially on this side of the shaped body of the open-cell foam will be produced.

If only a portion of the side (S1) of the shaped body of the open-cell foam to the layer (A) is modified, especially in a lateral configuration of the layer (A), this has the additional advantage that the sound absorption properties of the underlying open-cell foam are only slightly affected , Up to 90% of the surface of the side (S1) of the shaped body of the open-cell foam can be modified without affecting the sound absorption properties of the layer (A) in comparison to the unmodified open-cell foam. If the layer (A) on the side (S1) of the shaped body of the open-cell foam is arranged laterally, the open-cell foam according to the invention acts as a perforated plate.

The open-cell foam according to the invention and the production process of this open-cell foam according to the invention are defined in more detail below.

The open-cell foam is provided as a shaped article (molding) of any geometry, such as plates with smooth or profiled surfaces, cylinder or cone shapes, or free shapes. Usually, however, they are moldings in plate form, in which the first dimension (length) and the second dimension (width) may be the same or different, but in general the first and second dimensions are significantly larger than the third dimension (thickness ) of the molding. Suitable dimensions of such a plate are known in the art, for example, they are 1 m to 2 m, with a thickness of the plate of a few cm.

The open-cell foams according to the invention have at least one side (S1), preferably one side (S1). In principle, any side of a shaped body with any geometry can be used as the side (S1). The side (S1) is partially or completely provided with up to 2 cm thick layer (A). Optionally, 2 or more sides of a shaped body partially or completely with be provided such a layer (A). The shaped body then has 2 or more sides (S1), which may differ with regard to their geometry or shape. Preferably, in a shaped body with an arbitrary geometry that side is defined as the side (S1) which has the largest possible surface area (or area). The pore volume of the open-cell foam remains unconsidered. The term "side (S1)" is preferably understood to mean that surface or side which, when used as intended, for example as a wall, ceiling or room element, faces the room. Examples of possible geometries of the shaped bodies are in the following text in conjunction with 1 listed.

Open cell foams as such are known to those skilled in the art. Open-celled foams are also referred to as open-celled foams. Preferably, the open-celled foams are elastic or flexible. Suitable open-celled foams are melamine / formaldehyde condensation products, PIR (polyisocyanurate), PU (polyurethanes), polyimide foams or foams based on inorganic materials, for example aluminum phosphates, silicates, carbonized foams or ceramised foams.

Preferably, a melamine / formaldehyde condensation product is used as the open-cell foam. Such melamine / formaldehyde condensation products are available commercially under the name of Basotect ^® (BASF SE Ludwigshafen, Germany). These condensation products are for example in WO 2008/095931 or WO 01/94436 described.

The layer (A) comprises in addition to a part of the shaped body of the open-cell foam at least one PCM (Phase Changing Material). PCMs as such are known to those skilled in the art. Suitable PCMs are, for example, in WO 2008/095931 or US Pat. No. 6,765,031 disclosed. PCMs preferably have a melting point T _m in the range of 20 to 40 ° C. Optionally, PCMs with different melting point ranges may also be used. For example, for applications in the automotive sector, PCMs with higher melting points than 40 ° C can be used. Furthermore, the PCMs have a high enthalpy of fusion. Normally, the PCMs are used in the form of an aqueous dispersion, PCMs in microencapsulated form (PCM capsules) are preferably used, and PCMs without microencapsulation may also be used, for example PCM waxes.

Preferred PCMs are a microencapsulated paraffin mixture or a microencapsulated inorganic salt.

In general, the PCM content is 20 to 99 wt .-%, preferably 50 to 90 wt .-% in the layer (A), provided that the PCM is used as an aqueous dispersion. By adding PCMs in dried capsule formulations to a liquid binder polymer formulation, significantly higher PCM concentrations can be achieved.

Furthermore, the layer (A) comprises a solidified polymeric binder (binder). Suitable polymeric binders are in EP-B 0 672 524 described. Optionally, the binder can be used as a dispersion, preferably as a suspension; Common are dispersions having a solids content of 40-50%. Optionally, curing agents or other compounds may also be added to the polymeric binder, for example organic or inorganic acids such as formic acid, sulfonic acid, phosphoric acid or hydrogen phosphates. Optionally, thermal conductivity modifying additives, such as metallic powders for thermal management may be added to the polymeric binder.

Suitable polymeric binders are curable aminoplast resins such as melamine, urea or phenolic resins. Also suitable are epoxy, polyester or acrylic resins or polymer dispersions z. B. based on acrylates or polyurethanes and possibly with additions of inorganic components such as silica. The curable systems use aminoplast resins. These are relatively low molecular weight polycondensation products of NH-containing compounds with carbonyl compounds. Examples of suitable NH-containing compounds include urea, melamine, urethanes or aromatic amines. The carbonyl compounds are preferably formaldehyde, but they may also be higher aldehydes or ketones. Etherified aminoplast resins can also be used. They are obtained by etherifying all or part of the OH groups of amino resins with alcohols. Suitable alcohols are, in particular, aliphatic C ₁ -C ₁₀ -monoalcohols and C ₁ -C ₁₀ -dialocarbons. Examples include methanol, ethanol, butanol, 1,2-ethanediol or 1,4-butanediol.

The curable aminoplasts used may preferably be urethane-containing etherified amino resins. These are obtainable by using, for the purpose of etherification, at least partially C ₁ -C ₁₀ -dialcohols or subsequently etherifying compounds etherified with monoalcohols with dialcohols. etherified Aminoplast resins are commercially available. Likewise, preferably phenolic resins can be used. The binder dispersions preferably use dispersions of low glass transition temperature polymer components.

The weight ratio between polymeric binder, in particular aminoplast resins, and PCM capsules (100%) is between m (binder): m (PCM) is equal to or less than 0.4, preferably less than 0.25, more preferably less than 0.15 and most preferably less than 0.075.

As further described below in the process of making the open cell foam of the invention, the polymeric binders are solidified during the process of making the open cell foam. By solidification of the polymeric binder, a dimensionally stable and time-stable layer (A) can be produced, because thereby a flow out of the PCM also contained in the layer (A) is prevented.

The ratio between polymeric binder and PCM capsules when using a polymer dispersion as a binder is expediently between 0.05 and 0.5, preferably below 0.3.

A curable melamine resin, urea resin or phenolic resin or a polymer dispersion is preferably used as the polymeric binder.

The layer (A) has a thickness of up to 2 cm. Preferably, the thickness of the layer (A) is 5 to 15 mm. The layer (A) is thus not an additional layer which is applied to a shaped body of an open-cell foam, but the layer (A) according to the invention during the manufacturing process on at least one side (S1) of the underlying molded body within the open-cell Foam formed (the preparation process of the invention is described below in the text). In other words, this means that a part of the original shaped body of the open-celled foam is converted into the layer (A). In this case, the (at least) one side (S1) of the shaped body of the open-celled foam can be partially or completely provided with the layer (A).

Preferably, in the open-cell foams according to the invention, one side (S1) of the shaped body is partially provided with the layer (A). The area coverage is preferably from 20 to 90%, more preferably from 50 to 90%, in particular from 60 to 80%, of the surface of the untreated side (S1). The layer (A) particularly preferably has a lateral structuring. This means that preferably the edge regions or the region near the edges of the side (S1) are provided with the layer (A), while on the other hand the central region of the side (S1) has the open-cell foam in unaltered form. For example, the layer (A) may also have special patterns or the layer (A) is composed of several, possibly interconnected parts together. The layer (A) may be formed, for example, in round or oval, rectangular, square or line structures.

Optionally, individual subregions of the layer (A) may also have a different layer thickness or different degrees of saturation of the foam with PCM binder mixture. The same applies if 2 or more sides (S1) of the molding are provided with a layer (A). The respective layer (A) may also differ with respect to its components on one or more sides (S1) of the shaped body. The maximum layer thickness of 2 cm represents an average, which may slightly in some subregions of the layer (A) d. H. by 10 to 20%, can be exceeded.

The thickness of the part of the shaped body of the open-cell foam which has not been converted into the layer (A) can be of any desired size. The thickness of this unchanged part of the molding may be several millimeters to more than one meter. Since a side having a uniformly large surface area is preferably used as the side (S1) of the molded body used, and the molded articles of the third dimension (thickness) used are preferably significantly smaller in value, the thickness of the part of the molded body of the open-celled foam other than the Layer (A) is formed (hereinafter referred to as layer (B)) preferably 1 to 10 cm. The thickness of the layers (A) and (B) in the open-cell foam according to the invention thus corresponds to the total thickness (third dimension) of the shaped body of the open-cell foam used as educt in the production process according to the invention.

In a preferred embodiment based on an elastic or flexible open-celled foam, the part of the shaped body of the open-cell foam having the layer (A) is more rigid in comparison to the remaining part (layer B) of the shaped body. in other words, this means that the untreated part of the open-cell foam used as starting material completely or largely retains its mechanical properties.

In one embodiment of the present invention, the open cell foam may be provided with another layer. This is preferably an anti-noise layer or a sound-reflecting layer. Preferably, the anti-soaking layer is applied to the side (S2) which lies opposite the side (S1) in the shaped body of the open-celled foam. This additional layer can be applied to the shaped body of the open-cell foam before or after the production of layer (A) in the process according to the invention. If appropriate, more than one additional layer can be applied in succession or to different regions of the shaped body of the open-celled foam.

Examples of embodiments of the open-cell foams of different geometry according to the invention are shown in FIG 1 displayed. Figure (1) shows the open-cell foam according to the invention in an application as a wall plate, wherein additionally an anti-soaking layer can be applied to the side (S2). Figures (2) and (3) show cylindrical embodiments of the open-cell foams according to the invention, each in use as a ceiling element, wherein all the sides facing the space are partially provided with a layer (A).

In a further embodiment of the present invention, the open-cell foam on the side of the shaped body on which the layer (A) is located has no covering or no covering layer, for example in the form of a film of polyolefins.

Since the PCM is firmly bonded to the open cell foam by the polymeric binder, no covers or coatings of the open cell foam are needed. Nevertheless, the open-cell foam according to the invention can be integrated without significant losses in its functionality in wall or ceiling elements with rigid sheaths. In these applications, it is advantageous for the caloric and acoustic functionality of the open-celled foam when the layer modified with the layer (A) is behind a substantially open perforated plate or similar construction so as to be accessible to sound waves and heat exchange with the air , Corresponding structures with unmodified foam are known to the person skilled in the art and state of the art for sound-absorbing wall and ceiling elements.

Another object of the present invention is a process for the preparation of the above-described open-cell foam.

• a) auf mindestens einer Seite (S1) des Formkörpers des offenzelligen Schaums in Teilbereichen oder der gesamten Seite ein Gemisch (B) aus mindestens einem PCM und mindestens einem polymeren Binder aufgebracht wird,
• b) das Gemisch (B) bis zu einer maximalen Schichtdicke von 2 cm in einen Teil des Formkörpers des offenzelligen Schaums eindringt,
• c) worauf der im Gemisch (B) enthaltene polymere Binder unter Ausbildung der Schicht (A) verfestigt wird.

The inventive method comprises the following steps a) to c), wherein

• a) a mixture (B) of at least one PCM and at least one polymeric binder is applied to at least one side (S1) of the shaped body of the open-cell foam in partial regions or the entire side,
• b) the mixture (B) penetrates into a part of the shaped body of the open-cell foam up to a maximum layer thickness of 2 cm,
• c) whereupon the polymeric binder contained in the mixture (B) is solidified to form the layer (A).

Preferably, the solidification of the polymeric binder in step c) by reactive processes, drying, curing, pressing and / or filming takes place.

• a1) Teilbereiche der Oberfläche der Seite (S1) abgeklebt werden und das Gemisch (B) auf die nicht abgeklebten Teilbereiche der Oberfläche der Seite (S1) aufgebracht wird, oder
• a2) ein Spotterverfahren eingesetzt wird, bei dem örtlich definierte Mengen einer flüssigen Mischung aus PCM und polyermen Binder auf der Seite (S1) automatisiert abgesetzt werden oder
• a3) ein Siebdruck- oder ein Masken-Verfahren eingesetzt wird.

The application of the polymeric binder according to step a) can be carried out by all methods known to the person skilled in the art. Preferably, in step a), the mixture is applied to portions of the side (S1), wherein

• a1) areas of the surface of the side (S1) are taped and the mixture (B) is applied to the non-taped portions of the surface of the side (S1), or
• a2) a spotter method is used in which locally defined amounts of a liquid mixture of PCM and polymer binder on the side (S1) are deposited automatically or
• a3) a screen printing or a mask method is used.

The application rates in the processes described are typically between 1 and 20 kg of a preparation of PCM, polymer binder and optionally a carrier liquid (eg water) per m ² . The abovementioned processes according to a1) to a3) as such are known to the person skilled in the art.

Another object of the present invention is the use of the above-described open-cell foam according to the invention for thermal insulation, sound absorption, soundproofing, indoor climate effect, as a ceiling or wall element, as a free-standing space element in permanently or temporarily erected buildings, in motor vehicle, railway -, shipbuilding or aircraft construction and / or in space travel. Preferably, the use of the open-cell foam takes place as a latent heat storage and / or multifunctional ceiling, wall and room element. The use in motor vehicle, railway, ship or aircraft construction and / or in space travel is particularly suitable for the embodiment in which the open-cell foam according to the invention is provided on the side (S2) of an anti-soaking layer.

The invention will be clarified by way of examples below.

For the following examples, was unless otherwise noted, an open-cell melamine / formaldehyde foam having a density of about 10 kg / m ³ (Basotect ^® of BASF SE) are used.

example 1

Method A:

Sheets of this foam of 3 cm thickness are applied by means of a manual drip method or a mask method laterally structured PCM layers A. For this purpose, mixtures of the wax-based PCM dispersion Micronal DS 5000 X (42.8% solids content) and the PU-based bovine dispersion Luphen D 259 U from BASF SE are used. The mixing ratio between the two dispersions was 7: 1.

Method B:

In a further series of experiments, a mixture of the PCM dispersion Micronal DS 5000 X (42.8% solids content) and provided with NH ₄ NO ₃ as a hardener 70% solution of the water-soluble urea-formaldehyde glue Kauramin KMT 773 in a ratio of 10 : 1 applied to Basotect. Different masks with round or rectangular structures with dimensions in the range of a few cm are used.

In both cases, degrees of coverage of the plates are achieved from 50% to more than 80%, the amounts of PCM introduced into the plates are in both cases up to. 3 kg / m ² .

Schalldämmeigenschaft:

In the following table, the sound insulation properties of the aforementioned samples measured in Kundt's tube for samples with an area of 19.4 × 19.4 cm, thickness 2.5 cm, wall distance 10 cm) with different layer thicknesses (A) are compiled. As can be seen from the table, in the case of surface occupancies of up to 80% in the frequency range between 100 Hz and 630 Hz, the application of a structured PCM layer offers advantages in the soundproofing capacity over pure Basotect. At even higher occupancies and in the homogenously modified PCM sample, the maximum of the sound absorption shifts towards much lower frequencies, while the absorption in the higher frequency range decreases. Table 1: Sound absorption coefficient for various PCM-modified Basotect ^® boards PCM Beiegung None 50% circles 60% circles 79% slots 87% slots Order quantity [kg / m ² ] / procedure 0 0.5 / B 1 / A 2.5 / A 2.7 / A Thick layer A [mm] 0 3 5.5 8th 8th Frequency [Hz] / Absarct degree α 50 0.1 12:18 12:22 12:13 12:16 63 12:22 12:26 0.3 12:26 0.3 80 12:23 12:26 12:27 12:29 12:34 100 0.2 12:25 0.3 12:22 12:34 125 12:18 12:28 12:38 12:46 0.3 160 12:14 12:34 12:48 12:59 0.62 200 12:22 12:45 12:59 0.71 0.81 250 12:51 12:53 0.7 0.81 0.85 315 0.7 0.73 0.88 0.87 0.85 400 0.85 0.87 0.97 0.96 0.82 500 0.87 0.95 1 0.9 0.79 630 0.92 0.97 0.96 0.8 0.69 800 0.93 0.92 0.87 0.7 0.61 1000 0.83 0.8 0.73 12:58 12:51 1250 0.62 0.5 12:59 12:47 00:42 1600 0.6 0.6 0.87 0.77 0.65 2000 0.89 0.87 0.82 12:55 12:48 2500 0.83 0.68 0.69 12:55 12:54

thermal insulation

Another significant advantage of the present invention modified foam materials is the good thermal insulation capacity when used as a multifunctional wall plate. For this purpose, a thermal conductivity of 0.037 W / (mK) was measured on 3 cm thick boards with a PCM application rate of 2.5 kg / m ² and a surface coverage of 79% (see Table 1). In comparison, the thermal conductivity of an unmodified Basotect plate is 0.032 (W / mK). The thermal conductivity within the PCM-modified layer is thus approx. 0.15 W / (mK). Because of the small layer thickness of 5 mm, the characteristic heat diffusion time is at the same time considerably more favorable than in a foam treated homogeneously with PCM, which moreover has unfavorable thermal conductivities on a plate scale than the foam according to the invention. The heat diffusion coefficient relevant to the response of the PCM depends on the ratio of thermal conductivity and heat capacity. In a first approximation, this does not change with an increase in PCM loading, since both quantities increase largely linearly with the PCM loading. The heat diffusion time then increases with the square of the thickness of the PCM-containing region.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 1498680A [0002]
• EP 0672524 B [0003, 0023]
• EP 922563 B [0004]
• WO 2008/095931 [0005, 0019, 0020]
• US 6765031 B [0006, 0020]
• US 6675031 B [0006]
• WO 2009/077616 [0007]
• WO 01/94436 [0019]

Claims (13)

Open-cell foam, characterized in that at least one side (S1) of the shaped body of the open-celled foam is partially or completely provided with a layer (A) up to 2 cm thick, the layer (A) being formed from a part of the shaped body of the open-celled foam, is formed from at least one PCM (Phase Changing Material) and from at least one solidified polymeric binder. An open-cell foam according to claim 1, characterized in that the open-cell foam is a melamine / formaldehyde condensation product. Open-cell foam according to claim 1 or 2, characterized in that the thickness of the layer (A) is a maximum of 20 mm, preferably 5 to 15 mm. Open-cell foam according to one of claims 1 to 3, characterized in that the side (S1) of the shaped body is partially provided with the layer (A) and the area coverage 50 to 90%, preferably 60-80% of the surface of the side (S1) is. Open-cell foam according to claim 4, characterized in that the layer (A) has a lateral structuring. An open-cell foam according to any one of claims 1 to 5, characterized in that the PCM is a microencapsulated paraffin mixture or a microencapsulated inorganic salt and / or a curable melamine resin, urea resin or phenolic resin or a polymer dispersion is used as the polymeric binder. An open-cell foam according to any one of claims 1 to 6, characterized in that the portion of the shaped body of the open-cell foam having the layer (A) is more rigid compared to the remaining part of the shaped body. Open-cell foam according to one of claims 1 to 7, characterized in that the side (S2) which lies opposite the side (S1) in the shaped body of the open-celled foam is provided with an anti-soaking layer. Process for producing an open-celled foam according to one of Claims 1 to 8, characterized in that a) a mixture (B) of at least one PCM and at least one polymeric binder is applied to at least one side (S1) of the shaped body of the open-cell foam in partial regions or the entire side, b) the mixture (B) penetrates to a maximum layer thickness of 2 cm in a part of the shaped body of the open-cell foam. c) whereupon the polymeric binder contained in the mixture (B) is solidified to form the layer (A). A method according to claim 9, characterized in that the solidification of the polymeric binder in step c) by reactive processes, drying, curing, pressing and / or filming takes place. A method according to claim 9 or 10, characterized in that in step a) the mixture (B) is applied to portions of the side (S1), wherein a1) areas of the surface of the page (S1) are masked and the mixture (B) is applied to the non-taped portions of the surface of the side (51), or a2) a spotter method is used in which locally defined amounts of a liquid mixture of PCM and polymeric binder are deposited on the side (S1) in an automated manner, or a3) a screen printing or a masking method is used. Use of an open-cell foam according to one of claims 1 to 8 for thermal insulation, for sound absorption, for soundproofing, for indoor climate effect, as a ceiling or wall element, as a free-standing space element in permanently or temporarily erected buildings, in motor vehicle, railway, ship or Aircraft construction and / or in space travel. Use according to claim 12 as a latent heat storage and / or multifunctional ceiling, wall and room element.

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