DE1264459B - Process for the manufacture of printing rollers - Google Patents
Process for the manufacture of printing rollersInfo
- Publication number
- DE1264459B DE1264459B DEC34782A DEC0034782A DE1264459B DE 1264459 B DE1264459 B DE 1264459B DE C34782 A DEC34782 A DE C34782A DE C0034782 A DEC0034782 A DE C0034782A DE 1264459 B DE1264459 B DE 1264459B
- Authority
- DE
- Germany
- Prior art keywords
- mixture
- polyol
- molecular weight
- castor oil
- printing rollers
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N7/00—Shells for rollers of printing machines
- B41N7/06—Shells for rollers of printing machines for inking rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/18—Cold vulcanisation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C39/10—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/36—Hydroxylated esters of higher fatty acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/6547—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen the low-molecular compounds being compounds of group C08G18/36 or hydroxylated esters of higher fatty acids of C08G18/38
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/32—Wheels, pinions, pulleys, castors or rollers, Rims
- B29L2031/324—Rollers or cylinders having an axial length of several times the diameter, e.g. embossing, pressing or printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N2207/00—Location or type of the layers in shells for rollers of printing machines
- B41N2207/02—Top layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N2207/00—Location or type of the layers in shells for rollers of printing machines
- B41N2207/14—Location or type of the layers in shells for rollers of printing machines characterised by macromolecular organic compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Polyurethanes Or Polyureas (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Rolls And Other Rotary Bodies (AREA)
Description
BUNDESREPUBLIK DEUTSCHLANDFEDERAL REPUBLIC OF GERMANY
DEUTSCHESGERMAN
PATENTAMTPATENT OFFICE
AUSLEGESCHRIFTEDITORIAL
Int. Cl.:Int. Cl .:
B41nB41n
Deutsche Kl.: IS1-8/01German class: IS1-8 / 01
Nummer: 1264459Number: 1264459
Aktenzeichen: C 34782 VI b/151File number: C 34782 VI b / 151
Anmeldetag: 31. Dezember 1964Filing date: December 31, 1964
Auslegetag: 28. März 1968Opening day: March 28, 1968
Die Erfindung betrifft ein Verfahren zur Herstellung von Druckwalzen auf der Grundlage von Polyurethan, das als Komponente Ricinusöl enthält.The invention relates to a method for the production of printing rollers on the basis of Polyurethane containing castor oil as a component.
Es sind bereits Walzen für Druckmaschinen aus Gelatine und Glycerin bekannt. Diese Gelatine-Glycerin-Walzen sind billig und besitzen das erforderliche Haftvermögen und die gewünschte Elastizität für hochwertige Druckverfahren, jedoch wirkt sich der tägliche Witterungswechsel sehr nachteilig auf sie aus.There are already known rollers for printing machines made of gelatine and glycerine. These gelatin-glycerin rollers are cheap and have the required adhesiveness and elasticity for high-quality printing processes, but the daily change in weather has a very negative effect she from.
Weiterhin sind Druckwalzen aus natürlichem und synthetischem Gummi bekannt. Sie weisen gute Druckeigenschaften auf, sind aber teuer und vielfach unbefriedigend.Furthermore, pressure rollers made of natural and synthetic rubber are known. They show good ones Printing properties, but are expensive and often unsatisfactory.
Wegen ihrer einzigartigen Eigenschaften verdrängen die Druckwalzen aus Polyurethan in rasch zunehmendem Maß die herkömmlichen Druckwalzen.Because of their unique properties, the pressure rollers made of polyurethane are increasingly displacing Measure the conventional pressure rollers.
Bei den bekannten Verfahren zur Herstellung von Polymerisationsprodukten aus Polyestern und Diisocyanaten werden Polyester verwendet, die durch Veresterung von zweibasischen Säuren, beispielsweise Adipinsäure oder Terephthalsäure, mit Glykolen, beispielsweise Äthylenglykol oder Diäthylenglykol, gewonnen werden. Diese Polyester werden mit Diisocyanaten, beispielsweise p-Phenylendiisocyanat, Hexamethylendiisocyanat, Toluylendiisocyanat od. dgl. umgesetzt. Gemäß einem bekannten Verfahren werden die Diisocyanate im Überschuß eingesetzt, so daß bei Gegenwart von Aminen als Katalysator endständige Polyisocyanatgruppen erhalten werden.In the known processes for the preparation of polymerization products from polyesters and diisocyanates polyesters are used which are obtained by esterification of dibasic acids, for example Adipic acid or terephthalic acid, with glycols, for example ethylene glycol or diethylene glycol, be won. These polyesters are with diisocyanates, for example p-phenylene diisocyanate, hexamethylene diisocyanate, Tolylene diisocyanate or the like. Implemented. According to a known process, the diisocyanates are used in excess, so that terminal polyisocyanate groups are obtained in the presence of amines as a catalyst.
Bei einem weiteren bekannten Verfahren werden für die Reaktion mit Diisocyanaten verzweigte Polyester unter Zusatz von Katalysatoren verwendet.In another known process, branched polyesters are used for the reaction with diisocyanates used with the addition of catalysts.
Gemäß der Erfindung wird Ricinusöl mit Toluylendiisocyanat umgesetzt, gegebenenfalls in Gegenwart einer polymeren Verbindung. Das mit Ricinusöl als Polymerisationspartner erhaltene Produkt besitzt gegenüber den Polymerisationsprodukten aus Polyestern und Diisocyanaten in erhöhtem Maß die für Druckwalzen geforderten Eigenschaften. Insbesondere läßt sich ein für Druckwalzen besonders geeigneter Härtegrad mit großer Zuverlässigkeit erreichen. Auch läßt sich das erfindungsgemäße Produkt besonders einfach und billig herstellen. Ein weiterer Vorteil gegenüber, den bekannten Verfahren besteht ferner darin, daß kein Katalysator erforderlich ist.According to the invention, castor oil is reacted with tolylene diisocyanate, optionally in the presence a polymeric compound. The product obtained with castor oil as the polymerization partner has compared to the polymerization products from polyesters and diisocyanates to an increased extent the for Printing rollers required properties. In particular, one can be particularly suitable for printing rollers Achieve hardness with great reliability. The product according to the invention can also be particularly easy and cheap to manufacture. There is another advantage over the known methods also that no catalyst is required.
Bei dem erfindungsgemäßen Herstellungsverfahren werden Ricinusöl, Diisocyanate und ein Weichmacher gründlich miteinander gemischt und die Mischung in einem Reaktionsgefäß für kurze Zeit erhitzt, wobei noch eine polymere Verbindung wie Polyol, PoIykohlenwasserstoff oder ein natürliches Harz hinzu-Verf ahren zur Herstellung von DruckwalzenIn the production process according to the invention, castor oil, diisocyanates and a plasticizer are used thoroughly mixed together and the mixture heated in a reaction vessel for a short time, whereby another polymeric compound such as polyol or polyhydrocarbon or a natural resin addition process for making printing rollers
Anmelder:Applicant:
Council of Scientific and Industrial Research,Council of Scientific and Industrial Research,
Neu Delhi (Indien)New Delhi (India)
Vertreter:Representative:
Dipl.-Ing. W. Grämkow, Patentanwalt,Dipl.-Ing. W. Grämkow, patent attorney,
7000 Stuttgart-Bad Cannstatt, Marktstr. 37000 Stuttgart-Bad Cannstatt, Marktstr. 3
gefügt werden kann. Die Mischung wird dann in eine vorbereitete Form gegossen, diese für 3 bis 4 Tage stehengelassen und schließlich die Walze auf einer Drehbank bis zum gewünschten Durchmesser abgeschliffen. can be joined. The mixture is then poured into a prepared mold for 3 to 4 days let stand and finally sanded the roller on a lathe to the desired diameter.
Die Erhitzungsdauer der obigen Mischung ist von der jeweiligen Menge abhängig. Diese so erhaltene Mischung wird dann in eine vorbereitete Form aus Glas oder Metall gegossen. Da die Viskosität der Mischung bei der Gießtemperatur gering ist, steigen die während des Gießens entstehenden Gasblasen leicht an die Oberfläche. Etwaige in der Walzenmasse verbleibende kleine Blasen werden beim Erkalten der Mischung auf Raumtemperatur unsichtbar. Die Walzen werden einige Tage beiseite gestellt und können dann aus der Form herausgenommen werden. Anschließend können sie dann auf den genauen Durchmesser zugeschliffen werden.The heating time of the above mixture depends on the respective amount. This so obtained Mixture is then poured into a prepared glass or metal mold. Since the viscosity of the Mixing is low at the casting temperature, the gas bubbles formed during casting increase easily to the surface. Any small bubbles remaining in the roller mass are released when the Mixture invisible at room temperature. The rollers are set aside for a few days and can then removed from the mold. You can then adjust it to the exact diameter be ground.
Das erfindungsgemäße Verfahren wird in den folgenden Beispielen näher beschrieben. Diese Beispiele dienen lediglich der Veranschaulichung; die Erfindung ist nicht auf die dargestellten Einzelheiten beschränkt. The process according to the invention is described in more detail in the following examples. These examples are for illustrative purposes only; the invention is not limited to the details shown.
In einen mit Rührer, Thermometer und Tropftrichter versehenen Dreihalskolben von 500 ecm Fassungsvermögen werden 100 g Ricinusöl gegeben und dieses auf etwa 110° C erhitzt. Dann wird Toluoldiisoeyanat in einer Gewichtsmenge von etwa 22°/o des Ricinusöls innerhalb von etwa 5 Minuten tropfenweise hinzugefügt. Der Kolben wird nunmehr an eine Vakuumpumpe angeschlossen und 5 Minuten lang evakuiert. Der Inhalt wird dann in eine vorbereitete Form gegossen, die aus einer gerillten Voll- oder Hohlspindel aus Metall, einem hölzernen oder metal-In a three-necked flask of 500 ecm equipped with a stirrer, thermometer and dropping funnel 100 g of castor oil are added to the capacity and heated to about 110 ° C. Then toluene diisoeyanate becomes in an amount by weight of about 22% of the castor oil dropwise over about 5 minutes added. The flask is now connected to a vacuum pump and for 5 minutes evacuated. The contents are then poured into a prepared mold made from a grooved solid or Hollow spindle made of metal, a wooden or metal-
φ ;;-■■■■■ ■-.· 809 520/449φ ;; - ■■■■■ ■ -. 809 520/449
lenen Fuß sowie einem Glas- oder Metallrohr vom gewünschten Durchmesser besteht. Letztere wurde vorher mit einem Siliconfett oder einem hochschmelzenden Wachs beschichtet. Die Form wird dann zum Härten 3 oder 4 Tage abgestellt. Anschließend wird die Walze aus der Form genommen und auf einer Drehbank mit einer geeigneten Schleifwalze bis zu dem für die Druckmaschine erforderlichen Durchmesser abgeschliffen.Lenen foot and a glass or metal tube of the desired diameter. The latter was coated beforehand with a silicone grease or a high-melting wax. The shape will then set aside to harden for 3 or 4 days. Then the roller is removed from the mold and on a lathe with a suitable sanding roller up to what is required for the printing machine Ground diameter.
10 Beispiel 2 10 Example 2
In einen mit Rührer, Thermometer und Tropftrichter versehenen Dreihalskolben von 500 ecm Fassungsvermögen werden gegeben: 100 g Ricinusöl, 30 g Weichmacher, beispielsweise Dibutylphthalat oder Trikresylphosphat, 40 g Polyol, beispielsweise ein Polyester aus Adipinsäure, Sebacinsäure und Diäthylenglykol oder ein Polyäther (Polyäthylenglykol), mit einem Molekulargewicht von etwa 1000. Der Kolbeninhalt wird auf etwa 110° C erhitzt und anschließend Toluoldiisocyanat in einer Gewichtsmenge von etwa 30% des Ricinusöls unter Rühren tropfenweise innerhalb etwa 5 Minuten zugefügt. Das Gemisch wird gemäß Beispiel 1 weiterverarbeitet.In a three-necked flask of 500 ecm equipped with a stirrer, thermometer and dropping funnel Capacity is given: 100 g castor oil, 30 g plasticizer, for example dibutyl phthalate or tricresyl phosphate, 40 g polyol, for example a polyester made from adipic acid, sebacic acid and diethylene glycol or a polyether (polyethylene glycol), with a molecular weight of about 1000. The The contents of the flask are heated to about 110 ° C and then Toluene diisocyanate in an amount by weight of about 30% of the castor oil dropwise with stirring added within about 5 minutes. The mixture is processed according to Example 1.
In einen mit Rührer, Thermometer und Tropftrichter versehenen Dreihalskolben von 500 ecm Fassungsvermögen werden gegeben: 100 g Ricinusöl, 30 g Weichmacher, beispielsweise Dibutylphthalat, Trikresylphosphat u. dgl., und 30 g eines Polykohlenwasserstoffs mit niederem Molekulargewicht, beispielsweise flüssiger Gummi. Der Kolbeninhalt wird auf etwa 110° C erhitzt und anschließend Toluoldiisocyanat in einer Gewichtsmenge von etwa 30% des Ricinusöls unter Rühren tropfenweise innerhalb etwa 5 Minuten hinzugefügt. Das Gemisch wird gemäß Beispiel 1 weiterverarbeitet.In a three-necked flask of 500 ecm equipped with a stirrer, thermometer and dropping funnel Capacity is given: 100 g castor oil, 30 g plasticizer, for example dibutyl phthalate, Tricresyl phosphate and the like, and 30 g of a low molecular weight polyhydrocarbon, for example liquid rubber. The contents of the flask are heated to about 110 ° C. and then toluene diisocyanate in an amount by weight of about 30% of the castor oil with stirring dropwise within added about 5 minutes. The mixture is processed according to Example 1.
Claims (6)
Deutsche Patentschrift Nr. 954 376;
deutsche Auslegeschrift Nr. 1071 950.Considered publications:
German Patent No. 954,376;
German interpretative document No. 1071 950.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1051660D GB1051660A (en) | 1964-12-31 | ||
DEC34782A DE1264459B (en) | 1964-12-31 | 1964-12-31 | Process for the manufacture of printing rollers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEC34782A DE1264459B (en) | 1964-12-31 | 1964-12-31 | Process for the manufacture of printing rollers |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1264459B true DE1264459B (en) | 1968-03-28 |
Family
ID=7021489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEC34782A Pending DE1264459B (en) | 1964-12-31 | 1964-12-31 | Process for the manufacture of printing rollers |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE1264459B (en) |
GB (1) | GB1051660A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19625749C2 (en) * | 1996-06-27 | 1998-12-17 | Polywest Kunststofftechnik | Process for producing a seamless printing form for rotary letterpress printing |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE954376C (en) * | 1953-05-23 | 1956-12-13 | Bayer Ag | Process for the production of crosslinked plastics |
DE1071950B (en) * | 1957-08-09 | 1959-12-24 | Imperial Chemical Industries Limited, London | Process for the production of flexible rolls with the formation of a polyester urethane coating |
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0
- GB GB1051660D patent/GB1051660A/en active Active
-
1964
- 1964-12-31 DE DEC34782A patent/DE1264459B/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE954376C (en) * | 1953-05-23 | 1956-12-13 | Bayer Ag | Process for the production of crosslinked plastics |
DE1071950B (en) * | 1957-08-09 | 1959-12-24 | Imperial Chemical Industries Limited, London | Process for the production of flexible rolls with the formation of a polyester urethane coating |
Also Published As
Publication number | Publication date |
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GB1051660A (en) |
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