EP1165012A1

EP1165012A1 - Bonding agents for silicone materials

Info

Publication number: EP1165012A1
Application number: EP00917053A
Authority: EP
Inventors: Jürgen Engelbrecht; Martin Kix
Original assignee: S&C Polymer Silicon und Composite Spezialitaeten GmbH
Current assignee: S&C Polymer Silicon und Composite Spezialitaeten GmbH
Priority date: 1999-04-07
Filing date: 2000-04-07
Publication date: 2002-01-02
Also published as: DE19934116A1; AU3818400A; WO2000059451A1; US6403751B1

Abstract

The invention relates to copolymers consisting of hydrogen siloxanes and unsaturated compounds. The SiH groups have been at least partially converted into silanol groups or their reactive derivatives and/or silanol groups or their reactive derivatives are bonded to at least part of the SiH groups. The invention also relates to the resulting adhesive solutions, to their use as bonding agents between condensation crosslinking silicone relining compounds and prostheses, to their use as bonding agents for condensation crosslinking silicone impression compounds on impression trays and to other uses.

Description

Haf mediator for silicone materials

The present invention relates to copolymers of hydrogen siloxanes and unsaturated compounds, wherein the SiH groups have at least partially been converted into silanol groups or their reactive derivatives and / or are bonded to at least some of the SiH groups silanol groups or their reactive derivatives, adhesive solutions From this, their application as an adhesive agent between condensation-crosslinking silicone relining materials and prostheses, their application as an adhesive agent for condensation-curing silicone impression materials on impression trays and other applications.

Materials for dentures usually consist of poly methacrylate or of copolymers of different methacrylates. If a prosthesis no longer fits well, it must be manufactured again or relined (corrected). This relining can in turn be done with prosthesis material (hard relining), but it may also be necessary to select a significantly softer material for this purpose (soft relining). As the average age increases, the demand for the latter soft materials increases sharply.

Usual soft relining materials consist of plasticized polymethacrylates or of silicone. The plasticized polymethacrylates can be polymerized onto the (poly methacrylate) prosthesis material, but suffer from hardening up to embrittlement in the course of a few months when the plasticizer is removed. Relining with silicone elastomers does not show this embrittlement. They are permanently soft, on the other hand, a firm connection of silicone elastomers with polymethacrylates is always a major problem. Even if an attempt is made to mechanically bond the layers by dissolving or mechanical roughening, the silicone layer is detached after a few weeks or even a few days the prosthesis.

Several ways have been described to chemically solve this problem. For example, DE 196 35 696 A1 describes polymers which contain reactive groups such as -OH or -NH, to which hydrogen silicone units are linked with the elimination of hydrogen. Solutions of such copolymers containing SiH groups can, after application to a prosthesis surface, react and combine with an addition-crosslinking vinyl silicone layer. Since the hydrogen siloxane units are linked via -C-O-Si bonds or via -C-NH-Si bonds, bonds according to this published specification are quite hydrolysable in the aqueous environment of the mouth and are only suitable for short-term temporary relining of a few days or weeks.

A better solution to the problem is shown in EP 0 632 060 AI. For these purposes, copolymers are described there which are produced by copolymerizing methacrylates with vinyl or allyl methacrylates, hydrogensilicones of sufficient SiH content subsequently being attached to free vinyl or allyl groups with the aid of a platinum catalyst.

Solutions of these copolymers containing SiH groups can also react and combine with a vinyl silicone layer applied to a prosthesis surface after application. The hydrogen siloxane units are attached to the ester groups -CO-O- Polymer chain frameworks are knotted, better resistant to hydrolysis and therefore act as a bonding agent between the prosthesis material and the applied silicone over a longer period of time, even in the aqueous environment of the mouth. However, the production process is multi-stage and therefore cumbersome and expensive and the polymers produced have acid and base sensitive ester groups.

In the attached patent application DE 199 05 224.7 copolymers containing very hydrolysis-resistant SiH groups are described as a better solution, which have proven to be very effective adhesion promoters for relining prostheses with addition-crosslinking silicones and additionally have excellent properties if they can be used as an impression tray adhesive for addition-curing impression silicones.

The aforementioned adhesives of the patent specification EP 0632 060 AI and the more advanced adhesives of the patent application DE 199 05 224.7 have proven to be adhesives with potentially high adhesive forces. However, they can only be used effectively for bonding addition-crosslinking vinyl silicones.

However, there are similar questions and problems for a wide range of condensation-curing silicones. Here, too, it would be desirable to find similarly effective adhesive systems.

The object of the invention was therefore to find new hydrolysis-resistant materials which, when used in particular as a solution, lead to a permanently stable and moisture-resistant adhesive behavior between prosthesis material and soft, condensation-crosslinking silicone relining or, if appropriate, also between impression tray material and condensation-crosslinking impression silicone. In other words, it was the object of the invention to provide materials which, when used in particular as a solution, bring about a strong adhesive effect of prosthesis material on condensation-crosslinking silicones, and which act as a permanently stable and moisture-resistant adhesive between prosthesis material and soft silicone relines made of condensation-crosslinking silicones and as a strong impression tray adhesive can serve for condensation-curing impression silicones.

To achieve this object, copolymers are disclosed according to the invention which optionally have repeating structural units, in particular in the longest chain (basic chain)

a) of formula (I)

Ri Ri

II

Ri Ri

and b) of the formula (II)

R R R R R

R - [Si - 0] _m - Si - [C - C] ₀ - Y - [Si] „- R

Contain RRRRR, where in and p are independently integers> 0, n = 1, o = 1 or 0, y is a bond, an oxygen atom or a group of the formula - CR ₂ - or -CO-0-CR ₂ -CR ₂ -CR ₂ -, each of the radicals R and Ri independently of one another is an H atom, an optionally substituted alkyl group, a group of the formula -CR'2-OR ', -OR', -COOR ', -SiR _c R _d Re, -NR _d -R _c , an organic acid residue, its anhydride or its corresponding preferably] easily hydrolyzable ester of the formula - 0-CO-R _c or its corresponding, preferably easily hydrolyzable amide of the formula - NR-j-CO-R _c , a phenyl group optionally substituted with one or two -CR '= CR' ₂ groups, a group of the formula - CR _R R _f CHR _g -SiX ₃ , a group of the formula -SiOSiO (SiO) _m H, an epoxy group, an aziridine group, a phosphate or phosphonate group or their anhydrides, is a bond or two radicals R and / or two radicals Ri together represent a group of the formula = CR ₂ ,

where each of the radicals R ', R _c , R _d , R _e , R _f , R _g and X, independently of one another, can be an H atom, an —OH group, an optionally substituted alkyl group, an alkoxy group or an optionally substituted aryl group,

with the proviso that in at least one unit of the formula II at least one radical R bonded to an Si atom is an —OH, —OR _c - —NR _d R _c group or a radical of the formulas —OCOR _c , -NR _d COR _c is.

The following definitions apply to all embodiments in the description and the claims.

The alkyl groups, the alkoxy groups and the organic acid residues preferably have 1, 2, 3, 4, 5, 6, 7 or 8, preferably 1, 2, 3, 4, 5 or 6 carbon atoms, which are particularly preferably arranged linearly . But they can also be branched. Examples of the alkyl groups or the alkyl part of the alkoxy groups are Methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, n-peny] and n-hexyl groups.

An average person skilled in the art will select the substituents in accordance with his specialist knowledge in such a way that combinations of substituents which do not make sense for steric or other reasons arise. In particular, a maximum of two, preferably only one or no, sterically demanding group such as a t-butyl group should be selected for each represented unit of the formula I or II.

According to one embodiment, m and p independently of one another have the values 1, 2, 3, 4, 5, 6, 7, 8 or 9. However, they can also have values from 10 to 100 and more.

Aryl groups can be substituted or unsubstituted and e.g. ] aromatic ring or 2, 3 or 4 fused aromatic rings, each with e.g. Have 4, 5, 6, 7, 8, 9 or 10 carbon atoms and / or up to two N, O or S atoms.

As substituents, for example the substituted alkyl groups or aryl groups, etc., for example Ci-Cö-alkyl, vinyl or allyl groups, C ₅ - Cj ₂ aryl groups, -N0 ₂ -, -OH-, -CN-, -NH ₂ -, - S0 ₂ -, -COOH-, -CONH ₂ -, -CO-0-C _ι -C ₆ alkyl or -Cι-C ₆ acyl groups may be mentioned.

For the purposes of the invention, the radicals R, Ri or R 'can, independently of one another, contain at least one further functional group, with hydrogen silyl, alkoxysilyl, epoxy, acid or aziridine groups being preferred as further functional groups. Examples of preferred acid groups are phosphorus-containing acid groups, such as phosphoric acid or phosphonic acid groups, or Cl-C6 carboxylic acid groups. However, the radicals R, R 1 or R ^' preferably represent WO 00/59451 PCTtEPOO / 03098

at most one, preferably no further vinyl group, since otherwise the oat would be crosslinked too strongly.

The Ha mediators preferably have an average weight average molecular weight of 5,000-1,000,000, particularly preferably 20,000-200,000.

The haf mediators according to the invention preferably have the units (1:11) in a ratio of 25: 1 to 1:25 or 10: 1 bj.s to 1:10 or 5: 1 to 1: 5, in particular also 5: 1 up to 2: 1. The basic chains preferably have at least 50 of the above units I and / or II.

The radicals R, R _lr R ', R _c , R _d , R _e , R _f , R _g and X are independently H atoms, OH, methyl, ethyl, methoxy or ethoxy groups.

At least one unit of the formula I and one unit of the formula II are preferably linked to one another via C-Si bonds and / or via -OCO bonds.

According to the invention, an adhesive is further provided which contains at least one copolymer according to the invention and preferably a volatile solvent.

Hydrogen siloxane copolymers can be used in a first step for the preparation of the copolymers according to the invention. The hydrogen siloxane copolymers can e.g. B. by copolymerization of unsaturated compounds with SiH group-containing siloxanes as disclosed in DE 199 05 224.7, where the hydrogen siloxane group is bonded to or into the polymer chain via C-Si bonds. Such copolymers have in particular repeating structural units in the longest chain (basic chain)

a) of formula (I)

Ri Ri

I I

Ri - [C - C] _p - Rx

I I

Ri Ri

and

b) of the formula (II ')

R R

I I

R - [Si - 0] _m - [Si] „- R

I I

R R

, where m and p are independently integers> 0, n is 1, each of the radicals R and Ri independently of one another is an H atom or a substituted or unsubstituted alkyl group, for example a substituted or unsubstituted dC ₆ alkyl group, a group of Formula = CR ' ₂ , -CR' ₂ -0R ', -OR', -COOR ', -SiR' ₃ or a phenyl group optionally substituted with one or two -CR '= CR' ₂ groups or a bond to unit I. or II ^' , where each of the radicals R' independently of one another is an H atom or a substituted or unsubstituted alkyl group, for example a substituted or unsubstituted C ₁ -C ₆ - Can be an alkyl group, with the proviso that the units of the formula II contain at least one SiH group and that the units of the formula I are linked to the units of the formula II 'via C-Si bonds.

Alternatively, hydrogen siloxane copolymers can be used for the preparation of the copolymers according to the invention, as disclosed in EP 0632 060 A1, in which the hydrogen siloxane groups are bonded indirectly to the polymer chain via ester groups -OCO-.

For example, Monomers of unsaturated compounds and monomers of SiH group-containing siloxanes,

Homo- and / or copolymers of unsaturated compounds with monomers of siloxanes containing SiH groups,

Monomers of unsaturated compounds with homo- and / or copolymers of siloxanes containing SiH groups,

or homo- and / or copolymers of unsaturated compounds with homo- and / or copolymers of SiH group-containing siloxanes are copolymerized.

In a second step, according to the invention, the SiH groups can be partially or completely e.g. converted to silanol groups or their reactive derivatives by hydrolysis, alcoholysis, acidolysis or similar reactions, e.g. with hydrogen elimination and possibly with platinum catalysis:

Copolymer chain-siloxane-SiH + HX => copolymer chain-siloxane-SiX where X can be at least one of the following radicals or groups: -OH, -OR _c , -NR ^ -R--. , easily hydrolyzable esters or amides of the formula -0-CO-R _c , -NR ^ -CO-R--. , where Rc, Rd = alkyl or

Aryl. Polymers in which X is at least one halogen can also be produced as intermediates. However, these should be converted into the more stable and more tolerable derivatives defined above, since these can be used in a more tolerable manner.

However, HX can also be silicones with SiOH groups:

Copolymer chain-siloxane-SiH + HOSiO (SiO) _m H _ = ->

Copolymer chain-siloxane-SiOSiO (SiO) _m H

The unsaturated compounds can e.g. (Meth) acrylates, vinylbenzenes, vinyl ethers, allyl compounds, vinylsilanes or derivatives or mixtures thereof and in particular mono (meth) acrylates, monovinylbenzenes, monovinyl ethers, monoallyl compounds, monovinylsilanes or derivatives or mixtures thereof.

The hydrogen siloxane copolymers preferably have the units (1:11 ') in a ratio of 25: 1 to 1:25 or 10: 1 to 1:10 or 5: 1 to 1: 5, in particular also 5: 1 up to 2: 1. The basic chains preferably have at least 50 of the above units I and / or II '.

In a preferred embodiment, the unsaturated compounds contain at least one further functional group such as hydrogensilyl, alkoxysilyl, epoxy or aziridine groups, carboxylic acid or carboxylic anhydride groups, phosphate or phosphonate groups or their anhydrides. According to an alternative, in a second step, a hydrosilylation reaction can be used to add unsaturated silanol derivatives, which have, for example, the formula R _e R_C = CR _g SiX ₃ , to the SiH groups of the hydrogen-siloxane copolymer and thus to form a copolymer Silanol groups or their derivatives are converted; in these cases the reaction proceeds without hydrogen elimination, only by adding platinum-catalytic additive if necessary:

Copolymer chain-siloxane-SiH + C ^ C-SiX = ->

Copolymer chain-siloxane-Si-C-CH-SiX

Suitable unsaturated silanol derivatives are e.g. Vinyl triethoxysilane, allyl dimethyl ethoxysilane or methacrylpropyl triethoxysilane.

The silanol-siloxane units (SiX-siloxane) are either linked at the side or at the end to the chain of polymerized double bonds:

[SiX-siloxane] —CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC— [siloxane-SiX],

I I

[Siloxane-SiX] [siloxane-SiX]

but they can also be linked on two or more sides as siloxane units integral part of the chain structure:

SiX SiX

[SiX-S_loxan] -CCCCCC [S.loxan] CCCCCC [Siloxan] CCCCCC- [Siloxan-SiX],

I CCCCCC [SiX siloxane]

or mixtures of all types. Copolymers according to the invention can therefore also be prepared by copolymerizing at least one compound of the formula I or a compound having repeating units of the formula I with a compound of the formula II or a compound having repeating units of the formula II.

The properties of the copolymers according to the invention and their solutions are determined not only by the nature and the type of function R, Ri or X of the silanol group to a large extent by the starting hydrogen silicone units used, their abundance of SiH groups and their ratios of neutral Chain parts for hydrogen siloxane chain parts also determine solubility and activity. In the uses according to the invention as an adhesive, the neutral chain portions are e.g. important in order to mix intimately with the plastics to be bonded, to be joined, or in the presence of functional groups of this "neutral" chain of the formula I to show sufficient functionality (such as adhesion in the case of phosphate groups), on the other hand, a large number favors on silanolsiloxane groups, good integration into a condensation-crosslinking silicone applied thereon. The ratio of silanol-siloxane to non-siloxane fractions in the copolymer should be at least 1:25 to 25: 1 in advantageous versions, at least 1:10 up to 10: 1 in preferred versions and at least in particularly preferred versions 1: 5 to 5: 1.

HesDhesive solutions containing the silanol-siloxane copolymers according to the invention prove to be excellent adhesion promoters between condensation-crosslinking silicone relining materials and prostheses, as well as adhesion promoters for condensation-crosslinking silicone impression materials on impression trays and as excellent gencle Adhesive for other applications related to the bonding of silicones of the condensation-crosslinking type.

Particularly suitable solvents for adhesive solutions according to the invention are volatile, inert solvents such as halogenated or non-halogenated aliphatic or aromatic hydrocarbons, ethers, ketones, esters or cyclic siloxanes.

It can be useful to add small amounts of catalysts, such as are customary for condensation-crosslinking silicones, to the adhesive solutions, optionally also as an extra component, which is only added shortly before use.

Common catalysts for condensation-crosslinking silicones are, for example, strong acids such as CF ₃ S0 ₃ H or strong bases such as (CH_) ₄ NOH, or gentler systems such as amines, amine salts of organic acids and organic metal compounds of tin, titanium or zirconium such as dibutyltin dilaurate, dibutyltin oxide or Tetraalkoxy titanates.

Furthermore, silicon compounds, such as tetraethyl silicate or their oligosilicates, which act as crosslinkers for condensation-crosslinking systems can also be added as an admixture.

The copolymers according to the invention can also be used for purposes other than those mentioned for applications according to the invention. Thus, the copolymers according to the invention can also be used, for example, as additives for better crosslinking in condensation-crosslinking silicone mixtures or as a starting component for the production of copolymers which have been further modified by grafting on and in which the silanol groups or other reactive groups polymerized in as a point of attachment for grafting on others serve functional groups. The copolymers according to the invention are also suitable as coatings which can crosslink with hydrolysis when supplied with moisture.

Such coatings adhere extremely well to noble and base metals, glass, silicates, teeth and ceramics; if phosphate or carboxylic acid groups are present in the basic chain, the coatings adhere particularly well to base metals and tooth substrates.

These uses are also according to the invention.

The invention will be explained in more detail with reference to the following exemplary embodiments

Example 1:

Preparation of a starting hydrogensiloxane copolymer For the purpose of producing a hydrogen siloxane copolymer, 0.3 g of benzoyl peroxide is added to a solution of 20 g of ethyl methacrylate, 40 g of multifunctional hydrogen siloxane (crosslinker 430 from Bayer AG) and 40 g of toluene. The solution is heated to 90 ° C for 2 hours. After cooling to room temperature, the toluene is evaporated off under reduced pressure and the remainder with a Mixture of ethanol / methanol 1: 1 washed free of crosslinker. A gel-like hydrogen siloxane copolymer is obtained.

In order to prepare a comparative adhesive solution as an adhesive for addition-crosslinking silicones, 10 parts of the polymer obtained are dissolved in 90 parts of acetone. The adhesive solution is applied in a thin layer to a commercially available plastic impression tray made of polycarbonate (Miratray - 140 °, Hager and Werken, Germany), and left to dry for 1 minute. The spoon is then loaded with addition-curing impression silicone and placed in the mouth in such a way that the mass is preferably not pressed into the existing retention holes. At the end of the hardening period, the spoon is removed from the mouth and the slightly developed retention tongues are removed. Even without mechanical retention, the impression material is so firmly connected to the impression tray that it can only be removed from the impression tray if it is destroyed. Attempts to use the spoon in the same way for adhesive loading with condensation-curing silicone fail. The condensation-curing impression material can easily be lifted off the impression tray.

Example 2

Preparation of a silanol-siloxane copolymer according to the invention 13 g of the adhesive solution from Example 1 are diluted with 10 g of acetone and then mixed with 0.85 g of vinyltriethoxysilane. 0.01 g of a platinum catalyst (Siloprene U catalyst Pt-S, GE Bayer, The Netherlands) are added to this solution. The hydrosilation reaction is followed by means of the IR spectrum (SiH at 2158 cm ^-1 ) and about 0.12 g of vinyltriethoxysilane are added until the SiH band has disappeared. The triethoxysilanol-siloxane adhesive solution prepared in this way is brushed in a thin layer onto a commercially available plastic impression tray made of polycarbonate (Miratray - 140 °, Hager u. Werken, Germany) and left to dry for 1 min. The spoon is then loaded with condensation-crosslinking impression silicone and placed back in the mouth in such a way that the mass is not pressed into the existing retention holes if possible, and after the hardening time the spoon is removed from the mouth and the easily formed retention tongues are removed. The impression material is so firmly attached to the impression tray that it can only be removed from the impression tray if it is destroyed. Attempts to use the spoon in the same way for an adhesive loading with addition-crosslinking silicones now fail. The addition-curing impression material can easily be lifted off the impression tray.

Claims

claims

1. Copolymers, which may have repeating structural units

a) of formula (I)

Ri Ri

I I

Ri - [C - C] _p - Ri

I I

Ri Ri

and

b) of the formula (II)

R R R R R

I I I I I

R - [Si - 0] _m - Si - [C - C] ₀ - Y - [Si] _n - R

R R R R R

contain, where m and p are independently integers> 0, n = 1, o = 1 or 0,

Y is a bond, an oxygen atom or a group of the formula

CR ₂ - or -CO-0-CR ₂ -CR ₂ -CR ₂ - is, each of the radicals R and Ri independently of one another is an H atom, an optionally substituted alkyl group, a group of the formula -CR'2-OR ', -OR', -COOR ', -SiR _c R _d R _e , -NR _d - R _c , an organic acid residue, its anhydride or its corresponding ester of the formula --0-CO-R _c or its corresponding amide of the formula -NR _d -CO-R _c , one optionally with one or two -CR '= CR' ₂ -substituted phenyl group, a group of the formula -CR _e R _f CHR _g -SiX ₃ , a group of the formula -SiOSiO (SiO) _m H, an epoxy group, an aziridine group, a phosphate or phosphonate group or their anhydrides, one Bond or two radicals R and / or two radicals Rt together represent a group of the formula = CR ₂ ,

where each of the radicals R ', R _c , R _d , R _e , R _f , R _g and X independently of one another can be an H atom, an —OH group, an optionally substituted alkyl group, alkoxy group or aryl group,

with the proviso that in at least one unit of the formula II at least one radical R bonded to a Si atom is an -OH, -OR _c , - NR _d R _c group or a radical of the formulas -OCOR _c , -NR _d COR _c is.

2. Copolymers according to claim 1, characterized in that the radicals R, Ri, R ', R _c , R _d , R _e Rf R _g and X independently of one another are H atoms, OH, methyl, ethyl, methoxy or are ethoxy groups.

3. Copolymers according to one of the preceding claims, characterized in that at least one unit of the formula I and one unit of the formula II are linked to one another via C-Si bonds and / or via -OCO bonds.

4. Copolymers according to one of the preceding claims, characterized in that the alkyl groups are substituted or unsubstituted, branched or unbranched and preferably 1 to 12, more preferably have 1 to 6 and most preferably 1, 2 or 3 carbon atoms.

5. Copolymers according to one of the preceding claims, characterized in that the aryl groups are substituted or unsubstituted and have 1, 2, 3 or 4 fused aromatic rings.

6. Copolymers according to one of the preceding claims, characterized in that the substituents are branched or unbranched groups having 1, 2, 3 or 4 carbon atoms, -N0 ₂ , -CN, -NH ₂ , -C00H, vinyl, allyl- or -CONH ₂ groups.

7. Copolymers according to one of the preceding claims, characterized in that the ratio of silanol-siloxane fragments of the formula II or II 'to fragments of the formula I in the copolymer is at least 1:25 to 25: 1.

8. Copolymers according to one of the preceding claims, characterized in that the ratio of silanol-siloxane fragments of the formula II or II 'to fragments of the formula I in the copolymer is at least 1:10 to 10: 1.

9. Copolymers according to one of the preceding claims, characterized in that the ratio of silanol-siloxane fragments of the formula II or II ^' to fragments of the formula I in the copolymer is at least 1: 5 to 5: 1.

10. Adhesive containing at least one copolymer according to any one of the preceding claims.

11. Adhesive according to claim 10, characterized in that it contains a volatile solvent.

12. A process for the preparation of copolymers according to one of claims 1 to 9, characterized in that

a) monomers, homo- and / or copolymers of unsaturated compounds are copolymerized with monomers, homo- and / or copolymers of siloxanes containing SiH groups and

b) the SiH groups are converted into groups of the formula R, or

c) unsaturated silanol derivatives of the formula R _e R _f C = CR _g SiX _{3 are added} to the SiH groups of the siloxanes containing SiH groups.

13. The method according to claim 12, characterized in that the unsaturated compounds are copolymerized with SiH-containing siloxanes and the SiH groups are converted into silanol groups or their reactive derivatives.

14. The method according to claim 12, characterized in that the unsaturated compounds are (co) polymerized.

15. The method according to claim 12 or 13, characterized in that unsaturated compounds or compounds of the formula I are grafted with siloxanes containing SiH groups and at least some of the SiH groups are converted into silanol groups or their reactive derivatives or silanol groups or their reactive derivatives are grafted on .

16. The method according to any one of claims 12 to 15, characterized in that at least some of the SiH groups are converted into silanol groups or their reactive derivatives by hydrolysis, alcoholysis, acidolysis or similar reactions.

17. The method according to any one of claims 12 to 16, characterized in that at least some of the silanol groups or the reactive derivatives thereof by addition of unsaturated compounds containing at least one silanol group or reactive derivatives thereof to the SiH groups-containing siloxanes, in particular to the SiH Groups of the corresponding siloxanes is bound.

18. The method according to any one of claims 12 to 17, characterized in that the unsaturated compounds are (meth) acrylates, vinyl benzenes, vinyl ethers, allyl compounds, vinyl silanes or derivatives or mixtures thereof.

19. The method according to any one of claims 12 to 18, characterized in that the unsaturated compounds are mono (meth) acrylates, monovinylbenzenes, monovinyl ethers, monoallyl compounds, monovinylsilanes or derivatives or mixtures thereof.

20. The method according to any one of claims 12 to 19, characterized in that the unsaturated compounds contain at least one further functional group.

21. The method according to claim 20, characterized in that the functional groups are hydrogen silyl, alkoxysilyl, epoxy or aziriclin groups, carboxylic acid or carboxylic anhydride groups, phosphate or phosphonate groups or their anhydrides.

22. Use of adhesives according to any one of claims 10-11 as an adhesive for binding condensation-crosslinking silicone systems on detachable plastic parts.

23. Use of adhesives according to one of claims 10-11 as an adhesive for bonding condensation-crosslinking silicones to prosthesis materials.

24. Use of copolymers according to any one of claims 1-9 as an adhesive for binding condensation-crosslinking silicone impression materials on impression trays.

25. Use of adhesives according to any one of claims 10-11 as an additive for crosslinking condensation-crosslinkable silicone mixtures.

26. Use of copolymers according to one of claims 1-9 or of adhesives according to one of claims 10-11 as coatings.

27. Use according to claim 26 as coatings of noble and base metals, glass silicates and teeth.