DE19517962A1 - Moulding material, with good form stability and rheology properties, useful for dental applications - Google Patents

Abstract

A room temp. vulcanisable material (M1), based on polysiloxanes, polysulphides and/or aziridine-free polyesters, contains at least one wax excluding hydrogenated castor oil, paraffin wax or micro-waxes. Also claimed are: (i) polysiloxane-based materials (M2) contg. a wax excluding hydrogenated castor oil, paraffin wax or micro-waxes; (ii) kits for making (M); and (iii) the prepn. of the wax component for these kits.

Description

The invention relates to a mass based on polysiloxane Use as an impression material and its manufacture.

In dentistry, dentures are used based on models manufactures. Such a working model must be the tooth and jaw reproduce conditions as true to the original as possible. First becomes a spatial negative of the with the help of an impression material Jaw situation established. The in a plastic state For this purpose, the transferred impression material is transferred using an impression tray inserted the patient's mouth and there solidified into one hard or elastic mass that after removing the represents negative form. By pouring this impression with The working model is obtained from a model material.

As elastic impression materials u. a. synthetic Use polymers based on polysiloxanes (silicones) det. A chemical reaction turns them into elastomers networked. A distinction is made between silicone materials condensation and addition-crosslinking silicone materials. The condensation-crosslinking silicones usually crosslink by titanium or tin catalyzed reaction of the hydroxyter mined polysiloxane with silicon alkoxy compounds Elimination of an alcohol. With the addition-cross-linking Silicones are usually cross-linked by platinum catalyzed reaction of unsaturated hydrocarbons groups of the polysiloxane with Si-H groups of a hydrogen poly siloxane (hydrosilylation). Such silicone impression materials are  for example from EP-A-0 162 211, DE-A-40 31 759 and EP-A- 0 166 107 known. The silicone masses are usually called Two-component system delivered after mixing the Components are the resulting mass in the patient's mouth introduced and hardens there in a period of übli usually 3-5 minutes.

A disadvantage of the known silicone materials is that they are proportionate in the not yet hardened state have low stability. This can be done though Addition of pyrogenic silicas or a high filling degree of paste with coarse inorganic fillers improve, but is usually a thixotropic Behavior or poor definition of the paste connected during impression taking. This means that the Materials under the effect of the contact pressure during the Impression either tend to evade the pressure and flow away or cannot reproduce fine details. Because of this property, this is also for playback the details in the mouth important penetration of the sili Conform materials in columns are not particularly good.

The invention has for its object a polysiloxane mas se of the type mentioned to create an improvement te stability and creep penetration in not yet has cured condition and therefore the mentioned after does not share or has to a lesser extent.

According to the invention, a mass based on polysiloxane is created fen with a content of at least one wax Exception of paraffin and micro waxes is marked.

The term wax is intended within the scope of the invention all substances and Mixtures of substances that have the following properties:

• - Kneadable at 20 ° C, firm to brittle hard,  
• - Coarse to fine crystalline, translucent to opaque, however not glassy,
• - melting above 40 ° C without decomposition,
• - Relatively little above the melting point low viscosity,
• - strongly temperature-dependent in consistency and solubility,
• - Can be polished under light pressure.

This definition is taken from Ullmann's encyclopedia of technical chemistry, 4th edition, Verlag Chemie, Weinheim, volume 24, page 3 and represents a professionally recognized definition tion of waxes. Excluded from the subject of the the substance and the two components described in more detail below systems for its production are directed claims Paraffin and micro waxes, that is waxes that are petrochemical be produced by the fractionation of petroleum. Paraf Fin and micro waxes are already mentioned in detail ten Ullmann encyclopedia, volume 24, page 22-34. According to the invention, the following waxes can be used, for example be det.

• Plant waxes, such as carnauba waxes, candelilla waxes, Quricori waxes, sugar cane waxes, Retamo waxes;
• - animal waxes such as beeswax, other insect waxes or wool wax;
• - Montan waxes and polyolefin waxes.

A description of suitable waxes can be found in the genann Volume 24 of Ullmann's encyclopedia on pages 2-20 and 36-47. These references are made by reference to them made the subject of the disclosure of this application.  

Important components of the waxes are usually one or more of the following components:
Hydrocarbons, mainly saturated and little branched alkanes; Alkyl esters; Alkyl ether; primary alcohols; Acids; Ketones; Aldehydes; secondary alcohols; Hydoxy acids; Lactones; Acetals; Diols, mainly α-ω-diols); Dicarboxylic acids; Diketones; Polyester.

According to the invention, animal or vegetable fats, that fall under the definition of wax given above, be used. An overview of fats can be found in Ullmann's Encyclopedia of Technical Chemistry, 4th edition, volume 11, pages 457-524. This reference is also through Reference to the subject matter of the disclosure of this Registration made. As one for the purposes of the invention Beef tallow has proven to be a particularly suitable wax.

The effect of the wax used according to the invention is probably in the fact that the wax in the polysilicon mass forms a crystalline network that inclines the mass reduced to flow away under pressure and so the stability speed increased. From EP-A-0 166 107 it is already known Paraffin or micro waxes in silicone impression materials Mix. However, these microwaxes are not meant to be through education the stability of the mass of a crystalline network on the contrary, they are said to be so low Have melting range that they by the energy supply during Mixing and kneading the mass melt or at least melt and thus prevent the stickiness of the mass. The too solving task and the technical effect of the according to EP-A 0 166 107 added paraffin or micro wax is accordingly a different one than in the present invention.

The wax content of the mass is advantageously 1-40 % By weight, preferably 2-15% by weight, more preferably 5-10 % By weight. The wax additive according to the invention can be used for both  addition crosslinking as well as condensation crosslinking Polysiloxanes are made. The silicone mass takes place as Impression, - duplicating or modeling material in particular, however not exclusively in the dental field of application.

The molecular weight of the waxes used is preferably below 2000. Furthermore, it is preferred if the use ten waxes contain ester groups. Both of these characteristics contribute to the crystallization capacity of the wax or to improve the waxes.

The term "mass on poly." siloxane base "is intended to encompass all masses in which, according to the Crosslinking the polymer network mainly polysiloxanes includes. The term therefore particularly includes such Masses in which, for example, the weight fraction of added fillers and auxiliaries is larger than that Polysiloxanes.

Dental impression materials based on silicone are usually called Two-component system put on the market. After mixing of the two components in the intended ratio Networking and leaves the mass within a few minutes (usually 3-5 minutes) to an elastic molded body Harden.

The invention also relates to such two components systems for the production of a mass according to one of the claims 1-6. For the purpose of producing an addition-crosslinking Polysiloxane composition have these two components according to the invention according to the following components:

Component 1

• - Polysiloxanes with at least two unsaturated carbons hydrogen groups, preferably vinyl groups, in Molecule,  
• - Hydrogenpolysiloxanes with at least two Si-H groups in the molecule,
• - waxes with the exception of paraffin or micro waxes,
• - If necessary, customary fillers and additives, auxiliaries and dyes,

Component 2

• - Polysiloxanes with at least two unsaturated carbons hydrogen groups, preferably vinyl groups, in Molecule,
• - catalyst,
• - optionally waxes with the exception of paraffin or Micro waxing,
• - If necessary, customary fillers and additives, auxiliaries and dyes.

Component 1 contains the two that can be cross-linked Polysiloxane components, namely those with reactive double bin polysiloxanes (usually vinyl end groups), preferably so-called vinyl-terminated polysiloxanes and the with reactive Si-H groups provided hydrogenpolysiloxanes. Component 1 also contains the wax additive according to the invention as well as usual fillers such as Quartz and β-cristobalite flours, calcium sulfate and carbonate, Diatomaceous earth and fumed silica. The share of this Fillers are usually between 5 and 60% by weight.

The additives and auxiliaries can be conventional, for example Plasticizers, paraffin oils or the like, furthermore it can are also polysiloxanes without reactive groups that that is, they cannot participate in the crosslinking reaction. It  can, for example, trimethylsiloxy-endge stopped polysiloxanes to be used.

Dyes are particularly used to distinguish the two Components (base and catalyst paste) and for mixing con trolls used. As a rule, inorganic or organic color pigments used.

The polysiloxanes contained in component 2 and the given any waxes, fillers and other additives correspond to the components just described.

The catalyst is preferably a platinum complex, for example from hexachloroplatinic acid can be manufactured. However, every other platinum or another suitable catalyst compound that the Addition crosslinking reaction accelerated. Particularly good platinum-siloxane complexes are suitable, for example in US-A-3 715 334, US-A-3 775 352 and US-A-3 814 730 will.

Especially if the components have a longer shelf life in component 2, if necessary incorporated wax in terms of chemical contract selected with the catalyst used, so that it does not become ineffective prematurely. As additives can, if appropriate, also conventional catalyst inhibitors be added to the shelf life of the catalyst paste to increase.

The addition-crosslinking two-component is advantageous system matched so that base and catalyst paste in in a ratio of 1: 1. This makes the mass mixing much easier because then only the same length strands of the two pastes must be mixed together. Advantageously lies then the wax content in each of the two components between  1 and 40 wt .-%, preferably between 2 and 15 wt .-% further preferably between 5 and 10% by weight. Also the filler part is then advantageously in both components between the values of 5 and 60% by weight already mentioned.

It should be noted that the proportions of the two Components can vary. For example, it is not absolutely necessary that also in the catalyst paste Waxes are included. For example, if the setting of Pastes are made so that only small amounts of the catalyst paste wax must be mixed with the base paste dispense in the catalyst paste. Crucial to this two component system is just that not of in advance both cross-linking polysiloxane components ten and the catalyst contained in one component allowed to.

In a two-component system according to the invention for the manufacture a condensation-crosslinking silicone mass, have the the following components for both components:

Component 1

• - Polysiloxanes with at least two hydroxyl groups in the Molecule,
• - waxes with the exception of paraffin or micro waxes,
• - If necessary, customary fillers and additives, auxiliaries and dyes,

Component 2

• - Polyalkoxysilicate with at least two alkoxy groups in the Molecule,
• - catalyst,  
• - optionally waxes with the exception of paraffin or Micro waxing,
• - If necessary, customary fillers and additives, auxiliaries and dyes.

The waxes and, if necessary, the enclosed filling and Additives are the same as related above described with the addition-crosslinking silicones. Both component 2 contains polyalkoxysilicates cross-linking silicic acid esters (usually Ethyl ester), which under the action of the catalyst under Elimination of alcohol with the hydroxyl groups of component 1 contained polysiloxane can condense.

As a catalyst for the condensation reaction for example organic tin or titanium compounds such as Tin octoate or dibutyltin dilaurate is used.

In the case of condensation-crosslinking two-component systems usually the catalyst paste (component 2) of the base pa (component 1) in a significantly lower proportion than 1: 1 added. For example, a mixing ratio is common by 1:10. It will therefore often not be necessary, too of component 2 waxes and other fillers and additives to add. In the context of the invention it is therefore also possible as component 2 in the condensation-crosslinking systems use a commercially available catalyst paste.

The wax content of components 1 is advantageously 1 and / or 2 so that after their mixing in the intended Ratio in the mass obtained a wax content of 1-40 % By weight, preferably 2-5% by weight, more preferably 5-10 % By weight.

Another object of the invention is a method for Manufacture of the wax-containing components for manufacture  a two-component compound provided on the basis of polysiloxane system. It has the following process steps:

• - heating a mixture of polysiloxanes, wax as well optionally of filler, additive, auxiliary and dye fen to a temperature above the melting point of the Wax or waxes,
• - Make an emulsion of wax and polysiloxane by dispersing,
• Cooling the emulsion,
• - if necessary, mixing in further filling, additional, Auxiliaries and dyes in the cooled mass.

Crucial for the success of the method according to the invention is initially the intended heating of the mixture to a Temperature above the melting point of the wax. If that used wax not a sharp melting point, but one has wider melting range, this characteristic is so too understand that the mixture is at a temperature above this melting range is heated. The wax must total have passed into the liquid phase. A before in the solid phase of the wax existing crystalline network must at least largely destroyed.

Since wax and polysiloxanes do not usually intertwine solve, there is now a two-phase mixture that by Dispersion must be converted into an emulsion. If the Mixture already has other fillers or additives these are either solved in one of the two phases or in the Dispersed mixture. As a rule, however, it is advantageous especially inorganic fillers only in the last one above add mentioned process step. The formation and stabili sulation of the emulsion can optionally by known and  usual surface-active substances such as emulsifiers, emulsions stabilizers or pyrogenic silicas are supported.

In the next process step, the emulsion produced cooled down. When cooling, the melting point or Wax below melting range. Preferably cooling takes place quickly, for example by application the emulsion onto a cold surface like a chill roll. When cooling, the wax contained in the mixture forms probably a crystalline network that is the total mass penetrates and so to the improved state according to the invention strength of the mass leads.

In the cooled mass can with the help of usual Compoun if necessary, other customary filling, auxiliary, Additives and dyes are introduced.

The invention is described below with reference to exemplary embodiments len explained. The attached figures show:

Figure 1 shows schematically a device for checking the stability of a silicone mass.

FIG. 2 shows the result of examination of the stability of a condensation silicone composition;

Fig. 3 shows the result of examination of the stability of the base paste of an addition-crosslinking silicone composition.

example 1

Base and catalyst paste for an additi according to the invention Crosslinking silicone mass is produced as follows:  

Base paste

113 g vinyl-stopped polydimethylsiloxane with a visco sity of 1000 mPa · s, 57 g vinyl-terminated polydimethyl siloxane with a viscosity of 65000 mPa · s, 14 g vinyl endge stops polydimethylsiloxane with a viscosity of 165000 mPas (siloprene U1, U65 or U165, Bayer AG, Leverkusen), 19 g Paraffin (paraffin, low viscosity, Pioneer 2076, Hansen & Rosenthal, Hamburg), 5 g ethoxylated fatty alcohol (Lutensol A3, BASF AG), 22 g fumed silica HDKH 2000/4 (Wacker AG), 13 g of polyhydrogensiloxane containing SiH groups of 4.3 mmol / g and 25 g hydrogenated beef tallow Ewanol HY2 (Trade name of the company E. Wagner, Bremen) are placed in a 500 ml Beaker weighed in and in the heating cabinet at 150 ° C for 1 h heated.

Then the batch is hot for 2 min with a disper Gier stirred homogeneously and again in the heat for 30 minutes cabinet heated at 150 ° C. In the hot state it will receive ne mass over a three-roll mill (EXAKT 50, Exakt apparatus construction, Norderstedt, roller diameter 50 mm, roller length 15 cm) given. The rolls were at room temperature and lowest Operating speed. Then let the received one Ripen the resin mixture overnight at room temperature. At the the next day, a filler is made with a planetary mixer mixture of 15 g kieselguhr, 63 g β-cristobalite Sikron SF 6000 (Quarzwerke Frechen) and 146 g Sikron SF 8000 in the resin mix incorporated.

The paste shows a special stability, which becomes Example noticeable in that on the mixing block shaped structures do not come together even after a few days are fins.  

Catalyst paste

Analogous to the procedure for producing the base paste, 117, 96 and 11 g vinyl-terminated polydimethylsiloxanes from Visko quantity 1000, 65000 and 165000 mPas, 20 g paraffin (paraffin, thin, pioneer 2076, Hansen & Rosenthal, Hamburg), 5 g of ethoxylated fatty alcohol (Lutensol A3, BASF AG), and 23 g fumed silica HDKH 2000/4 with 25 g Ewanol HY2 (commercial name of the company E. Wagner, Bremen) melted, dispersed and passed over a three-roll mill. The next day 15 g of diatomaceous earth (PF5, Meyer-Breloh, Münster), 186 g of Sikron SF 6000, 20 g Sikron SF 8000, 0.5 g titanium dioxide (Kronos AV, Kronos, Leverkusen), 0.2 g divinyltetramethyldisiloxane and 6.5 g of a complex of platinum and divinyltetramethyl disiloxane with a planetary mixer into the resin mixture incorporated. The catalyst paste thus obtained shows the same stability as the base paste in Example 1.

If you mix this catalyst paste in a weight ratio of 1: 1 with the base paste, the mixture hardens after a few Minutes to an elastic, tear-resistant molded body with a Shore A hardness (after 24 h) from about 50. The material has one linear shrinkage of less than 0.1% (determined according to ISO 4823).

Comparative Example 1 (not according to the invention) Base paste

113 g vinyl-stopped polydimethylsiloxane with a visco sity of 1000 mPa · s, 57 g vinyl-terminated polydimethyl siloxane with a viscosity of 65000 mPa · s, 14 g vinyl endge stops polydimethylsiloxane with a viscosity of 165000 mPa · s, 19 g paraffin, 5 g ethoxylated fatty alcohol (Lutensol A3, BASF AG), 22 g of fumed silica HDKH 2000/4 and 13 g Polyhydrogensiloxane with an SiH group content of 4.3  mmol / g are on a planetary mixer with a filler 15 g diatomaceous earth, 63 g β-cristobalite Sikron SF 6000 (Quartz movements Frechen) and 146 g Sikron SF 8000 to a homogeneous processed paste.

Catalyst paste

Analogous to the procedure for producing the base paste, 117, 96 and 11 g vinyl-terminated polydimethylsiloxanes from Visko quantity 1000, 65000 and 165000 mPas, 20 g paraffin, 5 g ethoxy gated fatty alcohol (Lutensol A3, BASF AG), and 23 g pyrogenic Silica HDKH 2000/4 with 15 g of diatomaceous earth, 186 g Sikron SF 6000, 20 g Sikron SF 8000, 0.5 g titanium dioxide, 0.2 g Divinyltetramethyldisiloxane and 6.5 g of a complex Platinum and divinyltetramethyldisiloxane with one planetary knee ter processed into a paste.

If you mix this catalyst paste in a weight ratio of 1: 1 with the base paste from Example 1, the mixture hardens a few minutes to an elastic, tear-resistant molded body with a Shore A hardness (after 24 h) of approx. 50. The material has a linear shrinkage of less than 0.1% (determined according to ISO 4823).

Fig. 3 shows the stability of Example 1 (A) and Comparative Example (B) shows base paste prepared. It should be noted that comparable results are also obtained for the catalyst paste. Structures were molded into both base pastes on the mixing block using a spatula. Fig. 3 shows that these structures are still present essentially unchanged in the base paste according to the invention after one hour, while they have largely already merged again in the base paste of the prior art.

Example 2

This example shows a two-component according to the invention system for producing a condensation-crosslinking sili masses.

Base paste

115 g of hydroxyl-terminated polydimethylsiloxane with a Viscosity of 2000 mPas, 119 g of hydroxyl-terminated poly dimethylsiloxane with a viscosity of 18000 mPa · s (siloprene C2 or C18, Bayer AG, Leverkusen), 4 g fumed silica HDKH 2000/4 (commercial product from Wacker) and 19 g hydrogenated beef tallow Ewanol HY 2 (trade name of E. Wagner, Bremen) are weighed into a 500 ml beaker and heated in a warming cabinet at 140 ° C for 1 h.

Then the batch is hot for 2 min with a disper Gier stirred homogeneously and again in the heat for 30 minutes cabinet heated at 140 ° C. In the hot state it will receive ne mass given over a three-roll mill. Then you let them subsequent resin mixture obtained overnight at room temperature fen. The next day with a planetary kneader Filler mixture made from 31 g β-cristobalite Sikron SF 8000, 121 g Silbond 8000 RST (Quarzwerke Frechen), and 3.6 g color pigment incorporated into the resin mixture. In addition, 1 g distilled water, 5 g glycerin and 2 g silicone oil siloprene AC 3031 (commercial product from Bayer AG) stirred into the paste.

The paste has approximately the same stability as the addition-crosslinking base paste according to the invention shown under A in FIG. 3.

The commercially available catalyst component Paste hardener "Silagum KV catalyst" (from DMG, Hamburg) used and in a weight ratio of 1:10 with the base paste mixed. This catalyst is a mixture of alkoxyli polysilicates, tetraethyl orthosilicate,  Tin catalysts, petroleum jelly, low viscosity paraffin and fumed silica. The mixture hardens after a few Minutes to an elastic, tear-resistant molded body with a Shore A hardness (after 24 h) from approx. 40.

Comparative Example 2 (not according to the invention) Base paste

The components from Example 2 were, with the exception of the hy third beef tallow Ewanol HY 2 and without the described Melting and cooling process in a planetary kneader into a paste mixed. The paste obtained shows a clearly worse one Stability as the paste from Example 2. On the mix Block-shaped structures melt after a few hours again.

The commercially available catalyst component Paste hardener "Silagum KV catalyst" used and in Ge weight ratio 1:10 mixed with the base paste. The The mixture hardens to an elastic, tear-resistant molded body with a Shore A hardness (after 24 h) of about 40 out.

Stability determination

The test device shown schematically in FIG. 1 was used to determine the stability of the mixed masses of the same setting time. The test device has a metal plate 1 with a cylindrical recess 2 . A stamp 3 with a stamp plate 4 can be pushed back and forth in the recess 2 . In the extended position shown in FIG. 1, the stamp plate 4 is flush with the surface of the metal plate 1 on the right in FIG. 1. By moving the stamp 3 to the left in FIG. 1, a cylindrical depression is created in the metal plate 1 .

To load the test device, it is arranged so that the recess 2 points upwards and the punch 3 is retracted into this recess. The released from the stamp plate 4 of the recess 2 is provided with a in the pre-mixed composition ratio of basic and Katalysa torpaste filled and smoothed. About 20-60 seconds after the start of mixing (in the present examples 60 seconds after the start of mixing), the test device is brought into the vertical position shown in FIG. 1 and the stamp 3 is pressed out. Then wait until the mixture has hardened.

The flow behavior or the stability of the mixture results from section A (the entire flow section of the Mixing during the curing time) and B (flow path during the curing time, over which the silicone mass still with the Test wall remains in contact). The smaller the difference between between A and B and the smaller the absolute values of A and B, the greater the stability of the material.

Fig. 2 shows the thus measured flow behavior shows a according to Example 2 and Comparative Example 2 prepared kondensati-linking silicone mass. The stability of the mass (A) according to the invention is 1 mm (distance A = 4 mm, distance B = 3 mm). In contrast, the stability of Comparative Example 2 according to this method is 2 mm (distance A = 14 mm, distance B = 12 mm). Similar measured values also result for the masses according to Example 1 or Comparative Example 1 (not shown in the figures).

Claims (18)

Component 1 Component 2 Component 1 Component 2 1. mass based on polysiloxane, characterized by a content of at least one wax with the exception of paraffin fin or micro waxes. 2. Mass according to claim 1, characterized in that the Wax content 1-40 wt .-%, preferably 2-15 wt .-% further is preferably 5-10% by weight. 3. Mass according to claim 1 or 2, characterized in that the molecular weight of the waxes is less than 2000. 4. Mass according to one of claims 1 to 3, characterized records that the waxes contain ester groups. 5. Mass according to one of claims 1 to 4, characterized records that it is an addition-crosslinked polysiloxane contains. 6. Mass according to one of claims 1 to 4, characterized records that it is a condensation cross-linked polysiloxane contains. 7. Use of a mass according to one of claims 1 to 6 as an impression, duplicating or modeling material. 8. Two-component system for the production of a mass one of claims 1 to 5, characterized in that  the two components each have the following components exhibit:

• - Polysiloxanes with at least two unsaturated carbons hydrogen groups, preferably vinyl groups, in Molecule,
• - Hydrogenpolysiloxanes with at least two Si-H groups in the molecule,
• - waxes with the exception of paraffin or micro waxes,
• - If necessary, customary fillers and additives, auxiliaries and dyes.

• - Polysiloxanes with at least two unsaturated carbons hydrogen groups, preferably vinyl groups, in Molecule,
• - catalyst,
• - optionally waxes with the exception of paraffin or Micro waxing,
• - If necessary, customary fillers and additives, auxiliaries and dyes.

9. Two-component system according to claim 8, characterized records that the wax content in each of the two compos nenten 1-40 wt .-%, preferably 2-15 wt .-%, further is preferably 5-10% by weight.   10. Two-component system for the production of a mass one of claims 1 to 4 or 6, characterized in net that the two components each following inventory parts have:

• - Polysiloxanes with at least two hydroxyl groups in the Molecule,
• - waxes with the exception of paraffin or micro waxes,
• - If necessary, customary fillers and additives, auxiliaries and dyes.

• - Polyalkoxysilicate with at least two alkoxy groups in the Molecule,
• - catalyst,
• - optionally waxes with the exception of paraffin or Micro waxing,
• - If necessary, customary fillers and additives, auxiliaries and dyes.

11. Two-component system according to claim 10, characterized records that the wax content in the after mixing the Components 1 and 2 obtained in the intended ratio Mass 1-40 wt .-%, preferably 2-15 wt .-% further is preferably 5-10% by weight. 12. Two-component system according to one of claims 8 to 11, characterized in that the polysiloxanes used Are polydimethylsiloxanes.   13. A process for producing the wax-containing components of a two-component system provided for producing a mass based on polysiloxane, characterized by the following steps:

• Heating a mixture of polysiloxanes, wax and, if appropriate, fillers, additives, auxiliaries and dyes to a temperature above the melting point of the wax or waxes,
• Producing an emulsion of wax and polysiloxane by dispersion,
• Cooling the emulsion,
• - If necessary, mixing additional fillers, additives, auxiliaries and dyes into the cooled mass.

14. The method according to claim 13, characterized in that cooling the emulsion by applying it to a cold one Surface, preferably by application to a cooler roller, done.