EP2195387A2

EP2195387A2 - Flame-resistant sealing material

Info

Publication number: EP2195387A2
Application number: EP08836532A
Authority: EP
Inventors: Alexander SCHÖNBURG-HARTENSTEIN
Original assignee: Kreidewerk Josef Ramsauer KG
Current assignee: Kreidewerk Josef Ramsauer KG
Priority date: 2007-09-26
Filing date: 2008-09-25
Publication date: 2010-06-16
Also published as: KR20100085072A; CN101932658A; JP2010540707A; WO2009043808A2; WO2009043808A3; CA2700697A1; AU2008306979A1; US20100298489A1

Abstract

The present invention relates to a composition, which is obtained by mixing a) a polymer of the general Formula (1), R1 nR23-nSi(CR3R4)m-(O-CR3R4-CR5R6)o-O-(CR3R4)mSiR1nR23-n (1), and R1 and R2 are selected independently of one another from the group comprising an alkyl group with 1 to 8 carbon atoms and an alkyloxy group with 1 to 8 carbon atoms, n is a number from 0 to 3, R3, R4, R5 and R6 are selected independently of one another from the group comprising hydrogen and an alkyl group with 1 to 8 carbon atoms, m is a number from 0 to 10 and o is a number from 1 to 1000, and the polymer of the general Formula (1) has been modified optionally with acrylic acid, b) a metal, a compound or a complex from the group comprising the platinum metals, c) a condensation catalyst and d) a curing agent.

Description

Bremen, September 25, 2008

Our sign: RM 5143-01 EP GDO / vri

Applicant / owner: Ramsauer Dichtstoffe

Official file: new registration

KREIDEWERK JOSEF RAMSAUER KG, 5351 Aigen-Voglhub, Austria

Flame-resistant sealant

The present invention relates to flame retardant compositions which can be used as sealants and to a process for their preparation.

The sealants of the present invention contain silane-modified copolymers having one or more silicon-bonded and hydrolyzable groups (silyl groups) at the chain ends. These react when moisture enters and form elastomers with crosslinkers under the influence of catalysts. Two (or more) of such end groups result in crosslinking of the sealant. Crosslinking produces elastomers that are widely used, for example as adhesives, sealants or sealants.

In the prior art organopolysiloxane compositions are known which contain substantially organopolysiloxanes terminated with organoxy, catalysts and optionally additives.

DE 197 57 308 A1 discloses elastomers which crosslink with elimination of alcohols to give organopolysiloxane compositions. In this case, an HO-terminated organopolysiloxane reacts in the presence of a suitable catalyst with an alkoxysilane which has at least three alkoxy groups and / or its partial hydrolyzate. The cross-linking process is odorless, since neutral, environmentally compatible alcohols release as cleavage products. DE 43 41 136 C2 discloses crosslinkable organopolysiloxane compositions which are difficult to burn elastomers. The starting material used is an organopolysiloxane having per molecule at least 2 SiC-bonded, aliphatically reacted hydrocarbon radicals, as well as further inorganic fillers and organopolysiloxane. In DE 43 41 136 C2, only the use of an organopolysiloxane is disclosed as a prepolymer.

However, in the prior art, the need to upgrade the polyether elastomers otherwise used as sealants to silane functional groups which permit crosslinking to form an elastomer in the presence of moisture and alkoxysilanes results in the difficulty of flame retardant upgrading, as is known in the art known elastomers are highly flammable. Because of their chemical structure, the abovementioned sealants are usually also referred to as hybrids, since they have a polyether chain in combination with silyl end groups.

Sealants made from such hybrids have very good properties, however, the use of these sealants in areas where flame retardant sealants are prescribed is not possible. There is therefore a need in the art to modify the known sealants to be flame retardant.

A technical object of the present invention is thus to modify sealants containing silyl end group-modified polyethers so that elastomers prepared therefrom are flame retardant, and to provide a process for producing the same.

The technical object of the present invention is achieved by a composition obtained by mixing

a) a polymer of general formula 1

R ¹ _n R ² 3-n Si (CR ³ R ⁴ ) _m - (O-CR ³ R ⁴ -CR ⁵ R ⁶ ) _o -O- (CR ³ R ⁴ ) _m SiR ¹ _n R ² 3-n (1 wherein R ¹ and R ^{2 are} independently selected from the group consisting of alkyl group of 1 to 8 carbon atoms and alkyloxy group of 1 to 8 carbon atoms,

n is a number from 0 to 3,

R ³ , R ⁴ , R ⁵ and R ^{6 are} independently selected from the group consisting of hydrogen and alkyl group having 1 to 8 carbon atoms, m is a number from 0 to 10 and

o is a number from 1 to 1000,

wherein the polymer of general formula 1 has preferably been modified with acrylic acid,

b) a metal, a compound or a complex of the group of platinum metals,

c) a condensation catalyst, and

d) a curing agent

is obtained, wherein the composition (i) is obtained with admixing further constituents or (ii) without admixing further constituents.

Of course, it is clear to the person skilled in the art that if a variable in formula 1 is assigned several times (R ¹ , R ² , R ³ , R ⁴ ), each variable with the same name can have its meaning independently of the other variables with the same name. Preferably, however, variables with the same name also have the same meaning.

According to the invention, preference is given to a composition according to the invention which is obtained by the mixing described above, with homogenization taking place after mixing component a and b. The homogenization is preferably carried out over a period of at least one hour, more preferably over a period of at least six hours to 48 hours.

It is particularly preferred that the homogenization takes place at room temperature by simply leaving it to stand. In this case, it is preferable that the homogenization is carried out for twelve hours or more, more preferred is homogenization for twenty hours or more, more preferably homogenization for twenty-four hours or more. Preferred upper limits for the homogenization time in this case are 48 hours, more preferably 40 hours, and particularly preferably 30 hours.

Preferably, up to 99.99% by weight and more preferably from 50 to 99.9% by weight of the polymer of formula 1 are added to the composition, based on the total weight of the composition. Alternatively, it is preferred to have 15 to 49% by weight. - A -

of the polymer of formula 1, more preferably 20 to 40 wt .-%, each based on the total weight of the composition.

The metal, compound or complex of the group of platinum metals is preferably in a proportion of 0.001 to 1.0% by weight, preferably 0.001 to 0.5% by weight, and more preferably, based on the total weight of the composition from 0.01 to 0.25% by weight in the composition.

The condensation catalyst is preferably contained in a proportion of from 0.001 to 1% by weight, and more preferably from 0.01 to 0.5% by weight, in the composition, based on the total weight of the composition.

The curing agent is preferably contained in a proportion of 0.1 to 10% by weight, and more preferably 1 to 5% by weight, in the composition, based on the total weight of the composition.

The proportions of components from which the composition is obtained should be such that the sum of the selected ranges is 100% by weight.

Preferably, R ¹ and R ^{2 of} the polymer of general formula 1 are independently selected from the group consisting of methyl group, ethyl group, methoxy group and ethoxy group.

In a further preferred embodiment, in the general formula 1, R ^{1 is} a methyl group, R ^{2 is} a methoxy group and n is 1.

Preferably, R ³ , R ⁴ , R ⁵ and R ^{6 may be} independently selected from the group consisting of hydrogen, methyl group and ethyl group.

Preferably, each m is 1, 2, 3 and / or 4 and / or o is a number from 1 to 100. In a preferred embodiment, o is a number from 1 to 50, more preferably 1 to 20 and especially 1, 2, 3 , 4, 5, 6, 7, 8, 9, or 10.

It is further preferred that R3, R4 and R5 are hydrogen and R6 is a methyl group.

In a preferred embodiment, the metal, compound or complex of the group of platinum metals is platinum or palladium or comprises platinum or palladium. Preferably, metallic or finely divided platinum supported on a support such as silica, alumina or activated carbon is added to the composition. Compounds or complexes of platinum, such as platinum, for example, PtCl _6, H ₂ PtCl ₆ ^■ 6H ₂ O, Na ₂ PtCl ₄ ^■ 4H ₂ O, platinum-olefin complexes, platinum-alcohol complexes, platinum-alcoholate complexes, platinum Ether complexes, platinum-aldehyde

Complexes, platinum-ketone complexes, including reaction products of H ₂ PtCl ₆ ^■ 6H ₂ O and cyclohexanone, platinum-vinylsiloxane complexes such as platinum-1, 3-divinyl-1, 1, 3,3-tetramethyldisiloxane complexes with or without of detectable inorganic halogen, bis (γ-picoline) platinum dichloride, trimethylenedipyridineplatinum dichloride, dicyclopentadiene platinum dichloride, dimethylsulfoxydethylenoplatinum (II) dichloride, cyclooctadiene platinum dichloride, norbonadiene platinum dichloride, γ-picoline platinum dichloride and / or cyclopentadiene platinum dichloride are preferably used.

The condensation catalyst to be added to the composition is preferably an organic compound of tin, zirconium, titanium and / or aluminum. Preferred among these condensation catalysts are butyl titanates and organic tin compounds, such as di-n-butyltin diacetate, di-n-butyltin dilaurate and reaction products of at least two oxygen-bonded to silicon, optionally substituted by an alkoxy group, monovalent hydrocarbon radicals as hydrolyzable groups silane or its oligomer with Diorga- nozinndiacetat, wherein in these reaction products all valences of the tin atoms are saturated by oxygen atoms of the group -SiOSn- or by SnC-bonded, monovalent organic radicals.

The curing agent preferably leads to crosslinking of the composition. The curing agent is preferably an alkoxysilane, which preferably has at least three alkoxy groups and / or its partial hydrolyzate. A preferred alkoxysilane is vinyltrimethoxysilane or vinyltriethoxysilane. A partial hydrolyzate is preferably obtained by hydrolysis and condensation of preferably 2 to 4 alkoxysilanes. Partial hydrolysates are, for example, hexamethoxydisiloxane and hexahydoxydisiloxane.

Preferably, a filler is additionally added to the composition. The fillers may be selected from oxides or mixed oxides of metals and / or semimetals. Preference is given to fillers, such as quartz, diatomaceous earth, calcium silicate, zirconium silicate, zeolites, metal oxide powders, such as aluminum, titanium, iron or zinc oxides or their mixed oxides, barium sulfate, calcium carbonate, gypsum, Silicon nitride, silicon carbide, boron nitride, glass and plastic powders such as polyacrylonitrile powder, reinforcing fillers, non-reinforcing fillers such as pyrogenic silica, precipitated silica, carbon black such as furnace or acetylene black and silicon-aluminum mixed oxides with high BET surface area and fibrous Fillers, such as asbestos, as well as plastic fibers.

The fillers mentioned may be rendered hydrophobic, for example by treatment with organosilane or siloxane, with stearic acid or by etherification of hydroxyl groups with alkoxy groups. One type of filler or else a mixture of at least two fillers may be added to the composition.

The filler is preferably contained in a proportion of 1 to 80% by weight, preferably 5 to 70% by weight, and more preferably 10 to 60% by weight, based on the total weight of the composition.

In a further preferred embodiment, a plasticizer is added to the composition. As plasticizers, it is possible to use all plasticizers which are familiar to the person skilled in the art. In particular, trimethylsiloxy-endblocked dimethylpolysiloxanes or phosphoric acid esters which are liquid at room temperature may be added. Particular preference is given to alkylaryl phosphates which are added as plasticizers. In a further preferred embodiment, the plasticizer is selected from the group of benzyl phthalate esters,

Dibenzoate esters, phosphate esters, polymeric adipic acid esters and mixtures thereof. In particular, butylbenzyl phthalate, alkyl (C7-C9) benzyl phthalate, texanol benzyl phthalate, modified benzyl phthalate, dipropylene glycol dibenzoate, modified dibenzoate, benzyl phthalate, dipropylene glycol / diethylene glycol dibenzoate, 2-ethylhexyl monobenzoate, octyldiphenyl phosphate, isodecyldiphenyl phosphate, alkyl (C12-C16) aryl phosphate, poly (1,3-butane / 1,2-propanediol) adipate, poly (neopentane / 1,2-propanediol) adipate, poly (1,3-butane) adipate, poly (neopentane / butanediol) adipate, poly (1, 2-propanediol) adipate / phthalate and mixtures thereof as a plasticizer preferred.

The plasticizer is preferably contained in a proportion of 0.1 to 30% by weight, preferably 5 to 25% by weight, and more preferably 1 to 15% by weight, based on the total weight of the composition. Depending on the mixing method, it is preferred to add the plasticizer before a possible homogenization and / or after a possible homogenization of the composition.

More preferably, adhesion promoters are added to the composition. The adhesion promoters are preferably alkoxysilanes, aminosilanes and / or alkoxyaminosilanes which, in addition to alkoxy groups and / or amino groups, radicals selected from the group consisting of hydrogen atom, SiC-bonded hydrocarbon radicals, and SiC-bonded, substituted hydrocarbon radicals, and mixtures thereof and partial or mixed hydrolysates. The alkoxy groups having 1 to 6 carbon atoms are preferred, in particular methoxy, ethoxy and propoxy groups. In the case of the hydrocarbon radicals, alkyl and alkenyl radicals, and in particular the vinyl and 2-propynyl radicals, are preferred. Preferably, the hydrocarbyl group is a hydrocarbyl group having from 1 to 18 carbon atoms optionally substituted with epoxy, (poly) glycol or acid anhydride groups or groups of the formula --O (CO) - R ⁷ wherein R ^{7 is} hydrogen or hydrocarbyl.

The coupling agent is preferably contained in a proportion of 0.1 to 10% by weight, and more preferably 1 to 5% by weight, in the composition, based on the total weight of the composition.

Depending on the mixing method, it may be preferred that the adhesion promoter is added before possible homogenization and / or after possible homogenization.

Preferably, all ingredients of the composition are dried before mixing. In a further preferred embodiment, essentially anhydrous or anhydrous ingredients are used to prepare the composition.

Surprisingly, the composition of the present invention exhibits very good flame retardancy. The low flammability can be determined according to DIN 4102 in the fire shaft. The improved flame retardancy is likely, but without being bound by theory, achieved by the combination of the metal selected from the group of platinum metals with the condensation catalyst. Compositions which do not contain the combination of both substances show a significantly higher flammability and are suitable for use in in which flame retardant sealing materials are prescribed are not suitable.

A further aspect of the present invention is a process for the preparation of the aforementioned composition comprising the steps:

a) presentation of a polymer of the general formula 1

R ¹ _n R ² 3-n Si (CR ³ R ⁴ ) _m - (O-CR ³ R ⁴ -CR ⁵ R ⁶ ) o-O- (CR ³ R ⁴ ) _m SiR ¹ _n R ² 3-n (1 ), in which

R ¹ and R ^{2 are} independently selected from the group consisting of alkyl group having 1 to 8 carbon atoms and alkyloxy group having 1 to 8 carbon atoms, n is a number from 0 to 3,

R ³ , R ⁴ , R ⁵ and R ^{6 are} independently selected from the group consisting of hydrogen and alkyl group having 1 to 8 carbon atoms, m is a number from 0 to 10 and o is a number from 1 to 1000, wherein the polymer of the is optionally modified with acrylic acid, b) a metal, a compound or a complex from the group of platinum metals

c) a condensation catalyst, and

d) a curing agent is obtained.

In a preferred process according to the invention, homogenization takes place after step b), preferably in the manner indicated above.

More preferably, R ^{1 is} a methyl group and R ^{2 is} a methoxy group, where n is 1.

In a preferred embodiment, R ³ , R ⁴ , R ⁵ and R ^{6 are} independently selected from the group consisting of hydrogen, methyl group and ethyl group. It is further preferred that each m is 1, 2 3 and / or and / or o is a number from 1 to 100. Preferably, R ^3, R ⁴ and R ⁵ are hydrogen and R ⁶ is a methyl group.

The metal used is preferably platinum or palladium, wherein the aforementioned specific metal compounds can be preferably used.

Furthermore, the condensation catalyst is preferably an organic compound of tin, zirconium, titanium and / or aluminum. The aforementioned condensation catalysts may preferably be used.

For the curing agent to be used, the statements made above on this component apply analogously.

Optionally, fillers, plasticizers and / or adhesion promoters can be used in the process.

Of course, part of the invention is also a composition which can be prepared by a process according to the invention. Also part of the invention is a compound of a composition according to the invention as a sealant, adhesive and / or sealant.

As already explained above, the compositions according to the invention show a pronounced low flammability. The low flammability can be determined by a test of the fire behavior according to DIN 4102-1: 1998-05. By way of reference, this standard becomes part of this application. Accordingly, according to the invention, preferred mixtures according to the invention are hardly inflammable. It has been found that the homogenization described above after addition of a metal, a compound or a complex from the group of platinum metals has a positive effect on the degree of flame retardancy. The combination of a metal, a compound or a complex from the group of platinum metals with a condensation catalyst also seems to have a positive effect on the flame retardancy. Compositions which do not contain a combination of the last two groups of substances show a significantly higher flammability and are not suitable for use in areas where flame-retardant sealing materials are prescribed. It proved to be preferable to let a homogenization take place as described above before the condensation catalyst and / or the curing agent was added to the composition. Bθispiθl 1

Production of a sealant

20.00 g of dry Al (OH) ₃ (Martinal 01-104), 0.80 g of dry TiO ₂ , 2.20 g of polyamide wax (Crayvallac), 9.00 g of polymer S303H (Kaneka Corp., corresponds to a polymer according to the general formula 1 of the present application) and 6.70 g of an alkyl aryl phosphate (plasticizer) are mixed. 0.20 g of aminopropyltrimethoxysilane (silane A1 110), 0.20 of Pt-Kat512 (Hansechemie, Hamburg), 0.060 g of vinyltrimethoxysilane (curing agent and 0.40 g of dibutyltin diketanoate (TEGOKAT 226, Goldschmidt)) are subsequently added to the mixture The obtained composition is homogeneously mixed to obtain a sealing composition.

The resulting sealant composition exhibits a very good flame retardancy after curing. According to DIN 4102-1: 1998-05, the low flammability in the fire shaft is sufficient.

In addition, the sealing properties of the sealant composition are comparable to the prior art sealant compositions.

Example 2

Producing a larger amount of a sealant

250 kg of dry Al (OH) ₃ (Martinal OL-104, purchased from Brenntag, Vienna), 10 kg of dry TiO ₂ and 27.5 kg of polyamide wax (Crayvallac, purchased from Biesterfeld, Vienna) were mixed until homogeneous. Subsequently, 15 kg 1 Polymer S303H (Kaneka Corp., corresponds to a polymer according to general formula 1 of the present application) and 100 kg of a plasticizer (Disflamoll DPK, alkyl-aryl phosphate, Lanxess) were mixed and ten minutes at 6O ⁰ C held ,

Thereafter, 1.5 kg of aminopropyltrimethoxysilane (silane A1 110, obtained from SWOP-Chemie, Berchtoldsdorf) and 3 kg of platinum catalyst (Pt-Kat512, Hansechemie, Hamburg) were added. To homogenize the mixture was allowed to stand for 24 hours at room temperature. Then, 10 kg of vinyltrimethoxysilane (VTMO, available from Momentive, Leverkusen) and 2 kg of dibutyltin diketanoate (TEGOKAT 226, Goldschmittt, Mannheim) were added. Example 3

Analogously to Example 2, a sealant was prepared, although dispensed with the metered addition of the platinum catalyst.

Example 4

Comparison of the combustibility of the sealants prepared in Example 2 and Example 3

After firing, the sealants prepared in Example 3 burned without self-extinguishing, while the sealants prepared according to Example 2 exhibited rapid self-extinguishment.

Example 5

Testing the sealant prepared according to Example 2

With the sealant prepared according to Example 2, a fire test was carried out as far as not otherwise specified below according to DIN 4102-1: 1998-05.

A) Tests in the fuel box

The fire test was carried out according to DIN 4102-1 section 6.2.5. Five edge flames according to Section 6.2.5.2 (Samples Nos. 1 to 5) and five surface flames according to Section 6.2.5.3 (Samples Nos. 6 to 10) were performed. The test results are listed in the following table:

Table i:

B) Fire shaft tests

A jointing compound was placed in a 15 mm wide joint between two fiber cement carriers and pulled flush with the carriers. The joint depth was 10 mm. Four samples prepared in this way each gave a test specimen for the fire shaft tests. The test results are included in the following table.

Table 2:

The course of the flue gas temperatures is shown in Fig. 1.

10 min. The integral values I = J S * dt were selected from those shown in FIG

0

Light attenuation curves determined.

Fig. 1 illustrates the course of the flue gas temperature.

Fig. 2 illustrates the course of the light attenuation. Table 3 below summarizes test results in tabular form:

Table 3:

Result:

The sealant produced according to Example 2 meets the requirements of building material class B1 (flame retardant) according to DIN 4102-1: 1998-05. The sealant is according to DIN 4102-16: 1998-05 as non-burning falling / dripping.

Claims

claims

A composition obtained by mixing a) a polymer of general formula 1

R ¹ _n R ² 3-n Si (CR ³ R ⁴ ) _m - (O-CR ³ R ⁴ -CR ⁵ R ⁶ ) oO- (CR ³ R ⁴ ) _m SiR ¹ _n R ² 3-n (1)

wherein R ¹ and R ^{2 are} independently selected from the group consisting of alkyl group having 1 to 8 carbon atoms and

Alkyloxy group having 1 to 8 carbon atoms, n is a number from 0 to 3,

R ³ , R ⁴ , R ⁵ and R ^{6 are} independently selected from the group consisting of hydrogen and alkyl group of 1 to 8

Carbon atoms, m is a number from 0 to 10 and o is a number from 1 to 1000, wherein the polymer of general formula 1 has optionally been modified with acrylic acid, b) a metal, a compound or a complex from the group of platinum metals c) a condensation catalyst; and d) a curing agent, wherein the composition (i) is mixed with further

Ingredients or (ii) is obtained without admixing other ingredients.

2. The composition according to claim 1, characterized in that R ¹ and R ^{2 of} the polymer of general formula 1 are independently selected from the group consisting of methyl group, ethyl group, methoxy group and ethoxy group.

3. Composition according to claim 1 or 2, characterized in that R ^{1 is} a methyl group, R ^{2 is} a methoxy group and n is 1.

4. The composition according to any one of claims 1 to 3, characterized in that R ³ , R ⁴ , R ⁵ and R ^{6 are} independently selected from the group consisting of hydrogen, methyl group and ethyl group.

5. A composition according to any one of claims 1 to 4, characterized in that m is 1, 2, 3 and / or 4 and / or o is a number from 1 to 100.

6. A composition according to any one of claims 1 to 5, characterized in that R ³ , R ⁴ and R ^{5 is} hydrogen and R ^{6 is} a methyl group.

7. A composition according to any one of claims 1 to 6, characterized in that the metal is platinum or palladium.

8. A composition according to any one of claims 1 to 7, characterized in that the condensation catalyst is an organic compound of tin, zirconium, titanium and / or aluminum.

9. A composition according to any one of claims 1 to 8, characterized in that the curing agent is an alkoxysilane, which preferably has at least three alkoxy groups and / or its Teilhydrolysat.

10. The composition according to any one of claims 1 to 9, characterized in that the composition contains a filler.

11. A composition according to any one of claims 1 to 10, characterized in that the composition contains a plasticizer.

12. The composition according to any one of claims 1 to 11, characterized in that the composition contains a coupling agent.

13. A process for preparing a composition comprising the steps of: a) providing a polymer of general formula 1

in which R ¹ and R ^{2 are} independently selected from the group consisting of alkyl group having 1 to 8 carbon atoms and alkyloxy group having 1 to 8 carbon atoms, n is a number from 0 to 3, R ³ , R ⁴ , R ⁵ and R ^{6 are} independently are selected from the

Group consisting of hydrogen and alkyl group having 1 to 8 carbon atoms, m is a number from 0 to 10 and o is a number from 1 to 1000, wherein the polymer of general formula 1 has optionally been modified with acrylic acid, and e) adding a metal, a compound or a complex from the group of platinum metals, f) adding a condensation catalyst and g) adding a curing agent.

14. The method according to claim 13, characterized in that R ¹ and R ^{2 of} the polymer of general formula 1 are independently selected from the group consisting of methyl group, ethyl group, methoxy group and ethoxy group.

15. The method according to claim 13 or 14, characterized in that R ^{1 is} a methyl group, R ^{2 is} a methoxy group and n is 1.

16. The method according to any one of claims 13 to 15, characterized in that R ³ , R ⁴ , R ⁵ and R ^{6 are} independently selected from the group consisting of hydrogen, methyl group and ethyl group.

17. The method according to any one of claims 13 to 16, characterized in that each m is 1, 2, 3 and / or 4 and / or o is a number from 1 to 100.

18. The method according to any one of claims 13 to 17, characterized in that R ³ , R ⁴ and R ^{5 is} hydrogen and R ^{6 is} a methyl group.

19. The method according to any one of claims 13 to 18, characterized in that the metal is platinum or palladium.

20. The method according to any one of claims 13 to 19, characterized in that the condensation catalyst is an organic compound of tin, zirconium, titanium and / or aluminum.

21. The method according to any one of claims 13 to 20, characterized in that the curing agent is an alkoxysilane, which preferably has at least three alkoxy groups and / or its Teilhydrolysat.

22. The method according to any one of claims 13 to 21, characterized in that a filler is added.

23. The method according to any one of claims 13 to 22, characterized in that a plasticizer is added.

24. The method according to any one of claims 13 to 23, characterized in that an adhesion promoter is added.

25. A composition obtainable by any of the processes according to any one of claims 13 to 24.

26. Use of the composition according to any one of claims 1 to 12 or 25 as a sealant, adhesive and / or sealant.