CH660018A5

CH660018A5 - Ski wax

Info

Publication number: CH660018A5
Application number: CH115484A
Authority: CH
Inventors: Urs Geissbuehler
Original assignee: Ims Kunststoff Ag
Priority date: 1984-03-08
Filing date: 1984-03-08
Publication date: 1987-03-13

Abstract

The ski wax based on paraffin wax contains homogeneously dispersed carbon black and/or graphite. This enhances its thermal conductivity, which prevents the formation of excessively thick water films when the ski glides over snow.

Description

       

  
 

**WARNUNG** Anfang DESC Feld konnte Ende CLMS uberlappen **.

 



   PATENTANSPRÜCHE
1. Skiwachs auf Basis von Paraffinwachs, dadurch gekennzeichnet, dass es ausser Paraffinwachs, homogen verteilt, einen die Wärmeleitfähigkeit erhöhenden Zusatzstoff enthält.



   2. Skiwachs nach Anspruch 1, dadurch gekennzeichnet, dass es als Zusatzstoff homogen verteilten Kohlenstoff enthält.



   3. Skiwachs nach Anspruch 2, dadurch gekennzeichnet, dass der Kohlenstoff Russ ist.



   4. Skiwachs nach Anspruch 3, dadurch gekennzeichnet, dass der Russgehalt 1 bis 20 Gew.-% beträgt.



   5. Skiwachs nach Anspruch 2, dadurch gekennzeichnet, dass der Kohlenstoff Graphit ist.



   6. Skiwachs nach Anspruch 5, dadurch gekennzeichnet, dass der Graphitgehalt 1 bis 50 Gew.-% beträgt.



   7. Skiwachs nach Anspruch 2, dadurch gekennzeichnet, dass es als Kohlenstoff Russ und Graphit in einer Menge von zusammen 1 bis 70 Gew.-% enthält.



   8. Verfahren zur Herstellung von Skiwachs nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, dass man Russ und/oder Graphit in geschmolzenem Paraffinwachs verteilt.



   Die Erfindung bezieht sich auf ein Skiwachs auf Basis von Paraffinwachs und auf ein Verfahren zur Herstellung eines solchen Skiwachses.



   Beim Gleiten eines Skis auf Schnee oder Eis entsteht infolge der entwickelten Reibungswärme lokal Stellen eines dünnen Wasserfilmes, der für den beobachteten geringen Reibungskoeffizienten verantwortlich ist.



   Die Dicke des gebildeten Wasserfilmes hat hierbei einen grossen Einfluss auf diesen Reibungskoeffizienten.



   Die Wärmeleitfähigkeit von üblichen Skilaufsohlenbelägen aus Niederdruckpolyäthylen ist gering, so dass, besonders bei höheren Geschwindigkeiten, ein relativ dicker Wasserfilm entsteht, wodurch das Gleitverhalten des Skis deutlich schlechter wird.



   Die Aufgabe der Erfindung besteht darin, ein Skiwachs zur Verfügung zu stellen, mit dem dieser Erscheinung begegnet werden kann.



   Das erfindungsgemässe Skiwachs, mit dem die Aufgabe gelöst wird, ist dadurch gekennzeichnet, dass es ausser Paraffinwachs, homogen verteilt, einen die Wärmeleitfähigkeit erhöhenden Zusatzstoff enthält.



   Als Zusatzstoff eignet sich insbesondere Kohlenstoff (Russ und/oder Graphit) vorzüglich, obwohl auch andere die Wärmeleitfähigkeit erhöhende Zusatzstoffe denkbar sind, beispielsweise gewisse Metalloxide wie Zinkoxid.



   Es ist überraschenderweise gefunden worden, dass durch Zugabe von Russ und/oder Graphit zu einem Paraffinwachs eine Mischung mit definierter thermischer und elektrischer Leitfähigkeit erhalten wird. Insbesondere ist die thermische Leitfähigkeit erhöht. Durch Variieren der Russ- und/oder Graphitmenge ist eine Anpassung des Skiwachses an verschiedene Schneekategorien möglich.



   Das Skiwachs kann hergestellt werden, indem geeignete Russtypen (oder Mischungen von Graphit und Russ) in geschmolzenem Paraffinwachs dispergiert werden.



  Beispiel 1
70 Gewichtsteile Paraffin mit Fp 54/56   "C    und 30 Gewichtsteile Mikroparaffin mit Fp 80   "C    werden auf 110   "C    erhitzt. In die Schmelze werden 15 Gewichtsteile eines Russes mit einer Teilchengrösse von 20 nm und einem Ölbedarf von 500% verteilt.



   Die nach dem Abkühlen gemessenen elektrischen und thermischen Werte betragen: spez. Durchgangs- Wärmeleit widerstand DIN fähigkeit
53482 Konventionelles Skiwachs  >  10'5 cm   Q    0,4 W/mK Skiwachs gemäss Beispiel 1 105 cm   fl    0,5 W/mK
Beispiel 2
70 Gewichtsteile Paraffin mit Fp 54/56   C    und 30 Gewichtsteile Mikroparaffin mit Fp 80   "C    werden geschmolzen (120    C) und    mit 10 Gewichtsteilen Graphit mit einer Teilchengrösse von 7   nm    und 5 Gewichtsteilen des im Beispiel 1 erwähnten Russes versetzt.

 

   Die nach dem Abkühlen gemessenen elektrischen und thermischen Werte betragen: spez. Durchgangs- Wärmeleit widerstand DIN fähigkeit
53482 Konventionelles Skiwachs  >  10'5 cm   Q    0,4 W/mK Skiwachs gemäss Beispiel 2   107    cm   Q    1,0 W/mK 



  
 

** WARNING ** beginning of DESC field could overlap end of CLMS **.

 



   PATENT CLAIMS
1. Ski wax based on paraffin wax, characterized in that it contains, apart from paraffin wax, homogeneously distributed, an additive which increases the thermal conductivity.



   2. Ski wax according to claim 1, characterized in that it contains homogeneously distributed carbon as an additive.



   3. Ski wax according to claim 2, characterized in that the carbon is carbon black.



   4. Ski wax according to claim 3, characterized in that the soot content is 1 to 20 wt .-%.



   5. Ski wax according to claim 2, characterized in that the carbon is graphite.



   6. Ski wax according to claim 5, characterized in that the graphite content is 1 to 50 wt .-%.



   7. Ski wax according to claim 2, characterized in that it contains carbon black and graphite in an amount of 1 to 70% by weight.



   8. A method for producing ski wax according to one of claims 2 to 7, characterized in that carbon black and / or graphite is distributed in molten paraffin wax.



   The invention relates to a ski wax based on paraffin wax and to a method for producing such a ski wax.



   When a ski glides on snow or ice, the developed frictional heat locally creates spots of a thin film of water, which is responsible for the observed low coefficient of friction.



   The thickness of the water film formed has a major influence on this coefficient of friction.



   The thermal conductivity of conventional ski sole coverings made of low-pressure polyethylene is low, so that a relatively thick film of water is created, especially at higher speeds, which significantly reduces the sliding properties of the ski.



   The object of the invention is to provide a ski wax with which this phenomenon can be countered.



   The ski wax according to the invention, with which the object is achieved, is characterized in that it contains, apart from paraffin wax, homogeneously distributed, an additive which increases the thermal conductivity.



   Carbon (carbon black and / or graphite) is particularly suitable as an additive, although other additives which increase the thermal conductivity are also conceivable, for example certain metal oxides such as zinc oxide.



   It has surprisingly been found that by adding carbon black and / or graphite to a paraffin wax, a mixture with defined thermal and electrical conductivity is obtained. In particular, the thermal conductivity is increased. By varying the amount of soot and / or graphite, it is possible to adapt the ski wax to different snow categories.



   Ski wax can be made by dispersing suitable types of carbon black (or mixtures of graphite and carbon black) in molten paraffin wax.



  example 1
70 parts by weight of paraffin with mp 54/56 "C and 30 parts by weight of microparaffin with mp 80" C are heated to 110 "C. 15 parts by weight of a carbon black with a particle size of 20 nm and an oil requirement of 500% are distributed into the melt.



   The electrical and thermal values measured after cooling are: spec. Continuity thermal resistance DIN capability
53482 Conventional ski wax> 10'5 cm Q 0.4 W / mK Ski wax according to example 1 105 cm fl 0.5 W / mK
Example 2
70 parts by weight of paraffin with mp 54/56 C and 30 parts by weight of microparaffin with mp 80 ° C. are melted (120 ° C.) and 10 parts by weight of graphite with a particle size of 7 nm and 5 parts by weight of the carbon black mentioned in Example 1 are added.

 

   The electrical and thermal values measured after cooling are: spec. Continuity thermal resistance DIN capability
53482 Conventional ski wax> 10'5 cm Q 0.4 W / mK ski wax according to example 2 107 cm Q 1.0 W / mK

Claims

PATENT CLAIMS 1. Ski wax based on paraffin wax, characterized in that it contains, apart from paraffin wax, homogeneously distributed, an additive which increases the thermal conductivity.

2. Ski wax according to claim 1, characterized in that it contains homogeneously distributed carbon as an additive.

3. Ski wax according to claim 2, characterized in that the carbon is carbon black.

4. Ski wax according to claim 3, characterized in that the soot content is 1 to 20 wt .-%.

5. Ski wax according to claim 2, characterized in that the carbon is graphite.

6. Ski wax according to claim 5, characterized in that the graphite content is 1 to 50 wt .-%.

7. Ski wax according to claim 2, characterized in that it contains carbon black and graphite in an amount of 1 to 70% by weight.

8. A method for producing ski wax according to one of claims 2 to 7, characterized in that carbon black and / or graphite is distributed in molten paraffin wax.

The invention relates to a ski wax based on paraffin wax and to a method for producing such a ski wax.

When a ski glides on snow or ice, the developed frictional heat locally creates spots of a thin film of water, which is responsible for the observed low coefficient of friction.

The thickness of the water film formed has a major influence on this coefficient of friction.

The thermal conductivity of conventional ski sole coverings made of low-pressure polyethylene is low, so that a relatively thick film of water is created, especially at higher speeds, which significantly reduces the sliding properties of the ski.

The object of the invention is to provide a ski wax with which this phenomenon can be countered.

The ski wax according to the invention, with which the object is achieved, is characterized in that it contains, apart from paraffin wax, homogeneously distributed, an additive which increases the thermal conductivity.

Carbon (carbon black and / or graphite) is particularly suitable as an additive, although other additives which increase the thermal conductivity are also conceivable, for example certain metal oxides such as zinc oxide.

It has surprisingly been found that by adding carbon black and / or graphite to a paraffin wax, a mixture with defined thermal and electrical conductivity is obtained. In particular, the thermal conductivity is increased. By varying the amount of soot and / or graphite, it is possible to adapt the ski wax to different snow categories.

Ski wax can be made by dispersing suitable types of carbon black (or mixtures of graphite and carbon black) in molten paraffin wax.

example 1 70 parts by weight of paraffin with mp 54/56 "C and 30 parts by weight of microparaffin with mp 80" C are heated to 110 "C. 15 parts by weight of a carbon black with a particle size of 20 nm and an oil requirement of 500% are distributed into the melt.

The electrical and thermal values measured after cooling are: spec. Continuity thermal resistance DIN capability 53482 Conventional ski wax> 10'5 cm Q 0.4 W / mK Ski wax according to example 1 105 cm fl 0.5 W / mK Example 2 70 parts by weight of paraffin with mp 54/56 C and 30 parts by weight of microparaffin with mp 80 ° C. are melted (120 ° C.) and 10 parts by weight of graphite with a particle size of 7 nm and 5 parts by weight of the carbon black mentioned in Example 1 are added.

The electrical and thermal values measured after cooling are: spec. Continuity thermal resistance DIN capability 53482 Conventional ski wax> 10'5 cm Q 0.4 W / mK ski wax according to example 2 107 cm Q 1.0 W / mK ** WARNING ** End of CLMS field could overlap beginning of DESC **.