COMPOSITE HEAT INSULATION SYSTEM

Abstract

The invention relates to a composite heat insulation system, comprising an insulating layer, optionally a reinforcing layer, which is applied to the insulating layer, and a cover layer, which is applied to the insulating layer or, if present, to the reinforcing layer, characterized in that the cover layer contains composite particles, wherein the composite particles contain at least one organic polymer and at least one inorganic solid, wherein the weight percentage of inorganic solid is 15 to 40 wt %, with respect to the total weight of organic polymer and inorganic solid in the composite particle.

Claims

1. An external thermal insulation composite system comprising an insulating layer, optionally a reinforcing layer applied to the insulating layer, and a finishing layer applied to the insulating layer or optionally to the reinforcing layer, wherein the finishing layer comprises composite particles, wherein the composite particles comprise at least one organic polymer and at least one inorganic solid, wherein the amount by weight of inorganic solid is from 15 to 40% by weight, based on the total weight of organic polymer and inorganic solid in the composite particle.

2. The external thermal insulation composite system as claimed in claim 1, wherein the finishing layer comprises from 5 to 20% by weight composite particles, based on the total weight of the finishing layer.

3. The external thermal insulation composite system as claimed in claim 2, wherein the at least one inorganic solid are selection from the group consisting of titanium oxide, zirconium oxide, aluminum oxide, barium oxide, magnesium oxide, iron oxide, and silicon dioxide.

4, The external thermal insulation composite system as claimed in claim 3, wherein the at least one organic polymer is one or more polymerizates of ethylenically unsaturated monomers selected from the group consisting of vinyl esters of unbranched or branched alkylcarboxylic acids having from 1 to 15 carbon atoms, methacrylic acid esters and acrylic acid esters of alcohols having from 1 to 15 carbon atoms, vinyl aromatic compounds, olefins, dienes or vinyl halides; and optionally from 0.05 to 20% by weight, based on the total weight of the monomers, of one or more functional comonomers selected from the group consisting of ethylenically unsaturated mono- and di-carboxylic acids and silicon-functional comonomers.

5. The external thermal insulation composite system as claimed in claim 3, wherein the at least one organic polymer is one or more polymerizates of (meth)acrylic acid esters of alcohols having from 1 to 15 carbon atoms with from 3 to 12% by weight of ethylenically unsaturated carboxylic acids and optionally from 0.1 to 3% by weight of ethylenically unsaturated silanes and optionally from 0.1 to 50% by weight styrene, or polymerizates of (meth)acrylic acid esters of alcohols having from 1 to 15 carbon atoms with from 0.1 to 3% by weight of ethylenically unsaturated silanes and optionally from 0.1 to 50% by weight styrene, or wherein the amounts in % by weight in each case add up to 100% by weight.

6. The external thermal insulation composite system as claimed in claim 3, wherein at least one organic polymer is one or more polymerizates of vinyl esters of unbranched or branched alkylcarboxylic acids having from 1 to 15 carbon atoms with from 3 to 12% by weight of ethylenically unsaturated carboxylic acids and optionally from 0.1 to 3% by weight of ethylenically unsaturated silanes, or polymerizates of vinyl esters of unbranched or branched alkylcarboxylic acids having from 1 to 15 carbon atoms with from 0.1 to 3% by weight of ethylenically unsaturated silanes, wherein the polymerizates optionally comprise from 5 to 45% by weight of one or more monomer units from the group of vinyl esters, other than the copolymerized vinyl esters, of unbranched or branched alkylcarboxylic acids having from 3 to 15 carbon atoms, methacrylic acid esters, and acrylic acid esters of alcohols having from 1 to 15 carbon atoms, styrene, ethylene, butadiene or vinyl chloride, and wherein the amounts in % by weight in each case add up to 100% by weight.

7. A method for thermally insulating exterior facades of buildings comprising: fixing an external thermal insulation composite system as claimed in claim 6 to the exterior facade of a building.

8. The method as claimed in claim 7, wherein the fixing is carried out by an adhesive mortar and/or mechanical holding elements.

9. (canceled)

10. (canceled)

11. An external thermal insulation composite system comprising: composite particles comprising at least one organic polymer and at least one organic solid as claimed in claim 6.

Description

[0038] The examples which follow serve to explain the invention further:

Binder Dispersions:

Comparative Dispersion 1:

[0039] Aqueous vinyl chloride copolymer dispersion stabilized with emulsifier, having a solids content of 57.7% by weight and produced by means of emulsion polymerization of 76% by weight vinyl chloride, 6.2% by weight vinyl laurate, 17.4% by weight ethylene and 0.4% by weight glycidyl methacrylate.

Composite Dispersion 2:

[0040] 1098 g of comparative dispersion 1 were mixed together with 869.6 g of silica sol (solids content 41%f Bindzil 2040 from Akzo Nobel) and 31 g of 3-glycidoxypropyltrimethoxysilane (Geniosil GF 80, WACKER Chemie) in a reactor and stirred for five hours at 40 C.

[0041] A composite dispersion having a solids content of 51% by weight, was obtained. The silica content of the composite dispersion was 34% by weight, based on the total solids content.

Comparative Dispersion 3:

[0042] Aqueous copolymer dispersion stabilised with emulsifier, having a solids content of 44.7% by weight and produced by means of polymerization of 59.5% by weight, butyl acrylate, 24% by weight, methyl methacrylate, 11% by weight styrene, 5% by weight methacrylic acid and 0.5% by weight vinyltriethoxysilane.

Composite Dispersion 4:

[0043] 2000 g of comparative dispersion 3 were mixed with 394.5 g of silica sol (Bindzil 2040) in a reactor and stirred for three hours at 60 C. After cooling, a composite dispersion having a solids content of 43.9% by weight was obtained. The silica content, based on the total solids content, was 15% by weight.

Composite Dispersion 5:

[0044] 1388.6 g of comparative dispersion 3 were mixed with 911.4 g of silica sol (Bindzil 2040) in a reactor and stirred for three hours at 60 C. After cooling, a composite dispersion having a solids content of 42.8% by weight was obtained. The silica content, based on the total solids content, was 37% by weight.

Comparative Dispersion 6:

[0045] 1200.6 g of comparative dispersion 3 were mixed with 1098 g of silica sol (Bindzil 2040) in a reactor and stirred for three hours at 60 C.

[0046] After cooling, a composite dispersion having a solids content of 42.5% by weight was obtained. The silica content, based on the total solids content, was 4% by weight.

[0047] Production of the external thermal insulation composite systems (ETICS test specimens):

[0048] An external thermal insulation composite system was in each case constructed on a cement-bonded calcium silicate fire protection board (Promatec H from Promat AG) as the base board, of dimensions 150 mm100 mm and having a thickness of 12 mm.

[0049] An adhesive mortar composition was applied to the base board in a layer thickness of 4 mm, and in each case a polystyrene insulation board (Isover EPS facade insulation board 040 WDV from Saint Gobain) of dimensions 100 cm50 cm and having a thickness of 7 cm was placed on the adhesive mortar layer and pressed down.

[0050] The reinforcing mortar was then applied to the polystyrene insulation board in a layer thickness of 4 mm, and a glass fiber fabric (ETICS glass fiber fabric having a weight per unit area of 165 g/m.sup.2, mesh size 4 mm4 mm, white) was placed on the render layer.

[0051] Finally, a finishing render mortar was in each case applied to the reinforcing layer in a layer thickness of 4 mm.

[0052] The adhesive mortar and the reinforcing mortar each had the composition indicated in Table 1.

TABLE-US-00001 TABLE 1 148.8 g of cement (white cement CEM I 42.5 R from Dyckerhoff) 16.5 g of hydrated lime (Edelhydrat CL 90-S from Walhalla Kalk) 206.6 g of limestone (Juraperle MHS from Omya) 403.3 g of sand (quartz sand HR 81T from Quarzwerke) 49.6 g of dispersible powder (Vinnapas 5044N from Wacker Chemie) 1.2 g of cellulose ether (Tylose MB 15009 P2 from ShinEtsu) 174.0 g of water

[0053] The finishing render mortar in each case had the composition indicated in Table 2.

TABLE-US-00002 TABLE 2 Comparative Finishing Comparative Finishing Finishing Comparative Finishing render formulations render 1 render 2 render 3 render 4 render 5 render 6 CaCO.sub.3 filler (Calcilit 100, Alpha Calcit 360 360 360 360 360 360 Fullstoff) CaCO.sub.3 filler (Calcilit 1.5-2.0 mm, Alpha 320 320 320 320 320 320 Calcit Fullstoff) Kieseiguhr filler (Celite 281, Imerys 40 40 40 40 40 40 Minerals) Comparative dispersion 1 110.6 Composite dispersion 2 125.1 Comparative dispersion 3 142.8 Composite dispersion 4 145.4 Composite dispersion 5 149.1 Comparative dispersion 6 150.2 Preservative (Parmetol A26, 2 2 2 2 2 2 Schuike&Mayr) Rheological additive (Bentone EW, 0.8 0.8 0.8 2.0 2.5 3.0 Elementis) Thickener (Tylose MH1000KG4, 0.6 0.6 0.6 0.6 0.6 0.6 ShinEtsu) Cellulose fibers (Arbocel B 400, JRS) 3.0 3.0 3.0 3.0 3.0 3.0 Acrylic fibers (PAC hm 6.7/4 mm, Draton) 2.0 2.0 2.0 2.0 2.0 2.0 TiO.sub.2 pigment (Kronos 2190, Kronos) 20.0 20.0 20.0 20.0 20.0 20.0 Sodium hydroxide solution 10% strength 0.5 0.5 0.5 0.5 0.5 0.5 Coalescing agent (Lusolvan FBH, BASF) 3.0 5.0 Antifoam (Agitan 260, Munzing Chemie 1.0 1.0 1.0 1.0 1.0 1.0 GmbH) Dispersing agent (Dispes N 40, BASF) 2 2 2 2 2 2 Water 114.5 81.0 93.3 125.2 130.0 135.7 Total 980 964 988 1024 1029 1043

Test Methods:

[0054] The mechanical resilience of the external, thermal insulation composite systems was determined by means of the indentation test according to ST ISO 7 8 92 (1 kg steel ball, deflection 1.02 m.).

[0055] The results are summarized in Table 3:

TABLE-US-00003 Indentation test (5x) Indentation test Comparative render 1 + + + + + 100% Finishing render 2 + + + + 80% Comparative render 3 + + + + + 100% Finishing render 4 + + + + + 100% Finishing render 5 + + + + 80% Comparative render 6 + + 40%

[0056] The fire behavior was tested in accordance with DIN EN 13823 by the SBI test (single burning item) and classified according to DIN EN 13501-1.

[0057] The SBI test is a test method for testing the fire behavior of building materials. For that purpose, the test specimens were exposed to burning attack by a single burning item, a propane gas burner in a sand-box. The test specimen was positioned in a corner of a trolley and positioned beneath a smoke gas outlet. The reaction of the test specimen to flame impingement was recorded by instruments and visually, and the fire growth, smoke production and heat release were calculated from the measured values.

[0058] FIGRA [W/s]=fire growth rate

[0059] In the case of the FIGRA value (fire growth rate), the fire growth rate in W/s is determined.

[0060] THR.sub.600[MJ]=heat release after 10 min

[0061] With the THR.sub.600 value (total heat release), the total heat release after 600 seconds is determined.

[0062] TSP(600)[m.sup.2]= smoke production after 10 min:

[0063] The individual TSP (t) values (total smoke production, unit m.sup.2) represent the total smoke production of the samples until the time t of measurement. A TSP (t) value corresponds to the sum of the individual SPRav (t) values in the time period from the start of measurement to time t. The individual SPR.sub.av(t) values (smoke production rate, unit m.sup.2/s) thereby represent the current smoke production of the samples at time t of measurement. A SPR.sub.av value represents the quotient of a smoke gas volume stream in m.sup.3/s and the length in m of the light path through the tube of a photometric measuring device, which results in the unit m.sup.2/s. A TSP value represents the product of a sum of SPRav values in m.sup.2/s and the associated time period in s, which results in the unit m.sup.2.

[0064] SMOGRA [m.sup.2/S.sup.2]=smoke growth rate index

[0065] The SMOGRA values (SMOke GRowth RAte index, unit m.sup.2/s.sup.2) represent the maxima of the quotients of the SPR.sub.av(t) values of the samples and the associated times t of measurement. The SMOGRA value represents the quotient of a SPR.sub.av (t) value in m.sup.2/s and the associated time t in s, which results in the unit m.sup.2/S.sup.2.

[0066] The results are summarized in Table 4:

TABLE-US-00004 FIGRA THR.sub.600 s SMOGRA TSP.sub.600 s [W/s] |MJ| [m.sup.2/S.sup.2] [m.sup.2] Comparative render 1 57 2.3 18 66 Finishing render 2 35 1.6 13 48 Comparative render 3 62 2.9 9 87 Finishing render 4 45 2.5 6 70 Finishing render 5 35 2.2 4 50 Comparative render 6 30 1.8 3 45

[0067] The results, compared with the comparative renders without composite particles, demonstrate good mechanical strength in the indentation test and reduced fire growth (FIGRA) and heat release (THR). The smoke production (TSR) is likewise lower, and the same is true of the smoke growth rate (SMOGRA).