DE950602C - Process for increasing the coefficient of friction in objects made of polyurethane plastics made of linear, purely aliphatic polyesters - Google Patents
Process for increasing the coefficient of friction in objects made of polyurethane plastics made of linear, purely aliphatic polyestersInfo
- Publication number
- DE950602C DE950602C DE1953P0009798 DEP0009798A DE950602C DE 950602 C DE950602 C DE 950602C DE 1953P0009798 DE1953P0009798 DE 1953P0009798 DE P0009798 A DEP0009798 A DE P0009798A DE 950602 C DE950602 C DE 950602C
- Authority
- DE
- Germany
- Prior art keywords
- friction
- coefficient
- increasing
- linear
- objects
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/12—Chemical modification
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/06—Polyurethanes from polyesters
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Description
Verfahren zur Erhöhung des Reibungskoeffizienten bei Gegenständen aus Polyurethan-Kunststoffen aus linearen, rein aliphatischen Polyestern Die Erfindung bezieht sich auf die Erhöhung des Reibungskoeffizienten von Gegenständen, die zumindest an der Oberfläche eine Schicht aus Umsetzungsprodukten von vorwiegend aus linearen aliphatischen Komponenten aufgebauten Polyestern mit Di- bzw. Polyisocyanaten, wiesiezu\¼mter der geschützten Bezeichnung »Vulcolan« bekannt sind, aufweisen. Derartige Schichten können besonders als Schutzschichten bei Förderbändern, Treibriemen, Keilriemen, Autoreifen, Antriebstrommeln u. dgl. zur Anwendung kommen und haben hier die verschiedenartigsten Aufgaben, insbesondere bezüglich der Lebensdauer und Haltbarkeit gegenüber mechanischen und chemischen Beanspruchungen, zu lösen. Eine besondere Aufgabe ist es, den Reibungskoeffizienten dieser Kunststoffschicht zu erhöhen, weil sich dadurch das Rutschen von Automobilreifien bei nasser Straße sowie auch das Rutschen von Fördertrommeln infolge Verschmierung bei auftretender Nässe, wie dieses im Untertagebetrieb fast immer auftritt, vermeiden läßt.Process for increasing the coefficient of friction in objects Made from polyurethane plastics made from linear, purely aliphatic polyesters The invention refers to increasing the coefficient of friction of objects that at least on the surface a layer of reaction products of predominantly linear ones polyesters composed of aliphatic components with di- or polyisocyanates, as is the case with \ ¼mter the protected name »Vulcolan« are known. Such layers can be used especially as protective layers on conveyor belts, drive belts, V-belts, Car tires, drive drums and the like come into use and have the most varied of them here Tasks, especially with regard to the service life and durability compared to mechanical and chemical stresses. A special task is the coefficient of friction to increase this plastic layer, because it prevents the slipping of automobile tires on wet roads as well as the sliding of conveyor drums as a result of smearing Avoid in the event of wetness, which almost always occurs in underground operations leaves.
Die Erfindung löst diese Aufgabe in der Weise, daß die Oberflächen der Gegenstände mit Säuren oder Laugen behandelt werden. Hierdurch läßt sich eine solche Deckschicht derartig präparieren, daß sie einen guten Reibungskoeffizienten bei auftretender Nässe aufweist. The invention solves this problem in such a way that the surfaces the objects are treated with acids or alkalis. This allows a prepare such top layer in such a way that they have a good coefficient of friction when wet.
In ein£achster Weise läßt sich das neue Verfahren durchführen, in dem 2n-Schwefelsäure zur Anwendung kommt. Dieses Verfahren hat neben dem Vorteil, daß die Benetzung des Kunststoffes gegenüber Wasser zunimmt, den weiteren Vorteil, einfach anwendbar zu sein, so daß das Verfahren auch bei größeren Flächen wirtschaftlich durchführbar ist. The new method can be carried out in a similar way, in the 2N sulfuric acid is used. In addition to the advantage of that the wetting of the plastic against water increases, the further advantage, to be easy to use, so that the process is economical even for larger areas is feasible.
Das folgende Beispiel erläutert das Verfahren an einer Ausführungsform: Eine mit einer Schicht aus obigem Uretbankunststoff versehlene Antriebstrommel eines Förderbandes wird bei 30° mit einer 2n-Schwefelsäure für 10 Minuten bestrichen. Die überschüssige Schwefelsäure wird mit Wasser abgespült. Dadurch wird die Benetzungskraft des Kunststoffes für Wasser ganz beträchtlich erhöht, wodurch auch eine Erhöhung des Reibungskoeffizienten bei nasser Reibung erzielt wird. An Stelle von Schwefelsäure können auch andere Säuren bzw Laugen verwendet werden. The following example explains the method using an embodiment: A drive drum of a missing one with a layer of the above uretan plastic The conveyor belt is coated with a 2N sulfuric acid for 10 minutes at 30 °. The excess sulfuric acid is rinsed off with water. This will increase the wetting power of the plastic for water increased quite considerably, which also resulted in an increase the coefficient of friction is achieved with wet friction. Instead of sulfuric acid other acids or bases can also be used.
In ähnlicher Weise läßt sich naturgemäß das Förderband behandeln bzw. sonstige Gegenstände, die mit einer glelchlen Kunststoffschicht he deckt sind, wobei sich das Verfahren besonders für Kraftfahrzeugreifen eignet, blei denen die Rutschsicherheit gleichbedeutend mit der Erhöhung der Falirsicherheit ist. The conveyor belt can of course be treated in a similar manner or other objects that are covered with a similar layer of plastic, wherein the method is particularly suitable for motor vehicle tires, which lead Slip resistance is synonymous with increasing the security against falling.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1953P0009798 DE950602C (en) | 1953-05-23 | 1953-05-23 | Process for increasing the coefficient of friction in objects made of polyurethane plastics made of linear, purely aliphatic polyesters |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1953P0009798 DE950602C (en) | 1953-05-23 | 1953-05-23 | Process for increasing the coefficient of friction in objects made of polyurethane plastics made of linear, purely aliphatic polyesters |
Publications (1)
Publication Number | Publication Date |
---|---|
DE950602C true DE950602C (en) | 1956-10-11 |
Family
ID=582000
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1953P0009798 Expired DE950602C (en) | 1953-05-23 | 1953-05-23 | Process for increasing the coefficient of friction in objects made of polyurethane plastics made of linear, purely aliphatic polyesters |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE950602C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2484622A1 (en) * | 2005-02-09 | 2012-08-08 | Otis Elevator Company | Elevator load bearing member having a jacket with at least one traction-enhancing exterior surface |
US8449349B2 (en) | 2004-03-15 | 2013-05-28 | Otis Elevator Company | Elevator load bearing member having a jacket with at least one rough exterior surface |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB410171A (en) * | 1932-05-31 | 1934-05-10 | William Chauncey Geer | Improvements in or relating to rubber surfaces and methods of preparing the same |
US2102456A (en) * | 1935-08-17 | 1937-12-14 | Republic Rubber Company | Treatment of rubber articles |
-
1953
- 1953-05-23 DE DE1953P0009798 patent/DE950602C/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB410171A (en) * | 1932-05-31 | 1934-05-10 | William Chauncey Geer | Improvements in or relating to rubber surfaces and methods of preparing the same |
US2102456A (en) * | 1935-08-17 | 1937-12-14 | Republic Rubber Company | Treatment of rubber articles |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8449349B2 (en) | 2004-03-15 | 2013-05-28 | Otis Elevator Company | Elevator load bearing member having a jacket with at least one rough exterior surface |
US8734203B2 (en) | 2004-03-15 | 2014-05-27 | Otis Elevator Company | Elevator load bearing member having a jacket with at least one rough exterior surface |
EP2316613B1 (en) * | 2004-03-15 | 2014-12-24 | Otis Elevator Company | A method of making an elevator load bearing member having a jacket with at least one rough exterior surface |
EP1725375B2 (en) † | 2004-03-15 | 2018-01-24 | Otis Elevator Company | Method of making an ELEVATOR LOAD BEARING MEMBER HAVING A JACKET WITH AT LEAST ONE ROUGH EXTERIOR SURFACE |
EP2484622A1 (en) * | 2005-02-09 | 2012-08-08 | Otis Elevator Company | Elevator load bearing member having a jacket with at least one traction-enhancing exterior surface |
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