EP4326797A1 - Polyurethan, walzenbezug und herstellungsverfahren - Google Patents
Polyurethan, walzenbezug und herstellungsverfahrenInfo
- Publication number
- EP4326797A1 EP4326797A1 EP22708800.2A EP22708800A EP4326797A1 EP 4326797 A1 EP4326797 A1 EP 4326797A1 EP 22708800 A EP22708800 A EP 22708800A EP 4326797 A1 EP4326797 A1 EP 4326797A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- polyurethane
- roll
- diol
- polyurethane according
- silicic acid
- 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
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 47
- 239000004814 polyurethane Substances 0.000 title claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 150000002009 diols Chemical class 0.000 claims abstract description 29
- 229920000515 polycarbonate Polymers 0.000 claims abstract description 19
- 239000004417 polycarbonate Substances 0.000 claims abstract description 19
- 125000005442 diisocyanate group Chemical group 0.000 claims abstract description 10
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 10
- 235000012239 silicon dioxide Nutrition 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 7
- 150000002978 peroxides Chemical class 0.000 claims description 6
- 229910052717 sulfur Inorganic materials 0.000 claims description 6
- 239000011593 sulfur Substances 0.000 claims description 6
- 239000006229 carbon black Substances 0.000 claims description 5
- 239000003431 cross linking reagent Substances 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 5
- 230000001698 pyrogenic effect Effects 0.000 claims description 5
- 239000012763 reinforcing filler Substances 0.000 claims description 5
- LZDXRPVSAKWYDH-UHFFFAOYSA-N 2-ethyl-2-(prop-2-enoxymethyl)propane-1,3-diol Chemical compound CCC(CO)(CO)COCC=C LZDXRPVSAKWYDH-UHFFFAOYSA-N 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- JIABEENURMZTTI-UHFFFAOYSA-N 1-isocyanato-2-[(2-isocyanatophenyl)methyl]benzene Chemical class O=C=NC1=CC=CC=C1CC1=CC=CC=C1N=C=O JIABEENURMZTTI-UHFFFAOYSA-N 0.000 claims description 2
- SXFJDZNJHVPHPH-UHFFFAOYSA-N 3-methylpentane-1,5-diol Chemical compound OCCC(C)CCO SXFJDZNJHVPHPH-UHFFFAOYSA-N 0.000 claims description 2
- FQCJBRVTYJVAEF-UHFFFAOYSA-N [6-(hydroxymethyl)cyclohex-3-en-1-yl]methanol Chemical compound OCC1CC=CCC1CO FQCJBRVTYJVAEF-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 150000002334 glycols Chemical class 0.000 claims description 2
- ACCCMOQWYVYDOT-UHFFFAOYSA-N hexane-1,1-diol Chemical compound CCCCCC(O)O ACCCMOQWYVYDOT-UHFFFAOYSA-N 0.000 claims description 2
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical class CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 2
- UWJJYHHHVWZFEP-UHFFFAOYSA-N pentane-1,1-diol Chemical compound CCCCC(O)O UWJJYHHHVWZFEP-UHFFFAOYSA-N 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000005496 tempering Methods 0.000 claims description 2
- YXEBFFWTZWGHEY-UHFFFAOYSA-N [1-(hydroxymethyl)cyclohex-3-en-1-yl]methanol Chemical compound OCC1(CO)CCC=CC1 YXEBFFWTZWGHEY-UHFFFAOYSA-N 0.000 claims 1
- 125000003976 glyceryl group Chemical group [H]C([*])([H])C(O[H])([H])C(O[H])([H])[H] 0.000 claims 1
- 238000005266 casting Methods 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- -1 amine compounds Chemical class 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 238000004073 vulcanization Methods 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- ATVJXMYDOSMEPO-UHFFFAOYSA-N 3-prop-2-enoxyprop-1-ene Chemical compound C=CCOCC=C ATVJXMYDOSMEPO-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 229920002959 polymer blend Polymers 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 description 1
- IPJGAEWUPXWFPL-UHFFFAOYSA-N 1-[3-(2,5-dioxopyrrol-1-yl)phenyl]pyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C1=CC=CC(N2C(C=CC2=O)=O)=C1 IPJGAEWUPXWFPL-UHFFFAOYSA-N 0.000 description 1
- IGDCJKDZZUALAO-UHFFFAOYSA-N 2-prop-2-enoxypropane-1,3-diol Chemical compound OCC(CO)OCC=C IGDCJKDZZUALAO-UHFFFAOYSA-N 0.000 description 1
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 125000004386 diacrylate group Chemical group 0.000 description 1
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000012767 functional filler Substances 0.000 description 1
- 235000019589 hardness Nutrition 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 239000002530 phenolic antioxidant Substances 0.000 description 1
- AQSJGOWTSHOLKH-UHFFFAOYSA-N phosphite(3-) Chemical class [O-]P([O-])[O-] AQSJGOWTSHOLKH-UHFFFAOYSA-N 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 238000010057 rubber processing Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- VTHOKNTVYKTUPI-UHFFFAOYSA-N triethoxy-[3-(3-triethoxysilylpropyltetrasulfanyl)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCSSSSCCC[Si](OCC)(OCC)OCC VTHOKNTVYKTUPI-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- PIMBTRGLTHJJRV-UHFFFAOYSA-L zinc;2-methylprop-2-enoate Chemical compound [Zn+2].CC(=C)C([O-])=O.CC(=C)C([O-])=O PIMBTRGLTHJJRV-UHFFFAOYSA-L 0.000 description 1
- XKMZOFXGLBYJLS-UHFFFAOYSA-L zinc;prop-2-enoate Chemical compound [Zn+2].[O-]C(=O)C=C.[O-]C(=O)C=C XKMZOFXGLBYJLS-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- 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
- C08G18/83—Chemically modified polymers
- C08G18/86—Chemically modified polymers by peroxides
-
- 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
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
-
- 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
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/44—Polycarbonates
-
- 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
- C08G18/67—Unsaturated compounds having active hydrogen
- C08G18/675—Low-molecular-weight compounds
-
- 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
- C08G18/83—Chemically modified polymers
- C08G18/87—Chemically modified polymers by sulfur
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
- D21G1/02—Rolls; Their bearings
- D21G1/0233—Soft rolls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
-
- 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
- C08G2150/00—Compositions for coatings
-
- 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
- C08G2261/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G2261/70—Post-treatment
- C08G2261/76—Post-treatment crosslinking
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
- F16C2208/10—Elastomers; Rubbers
- F16C2208/12—Polyurethan [PU]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2223/00—Surface treatments; Hardening; Coating
- F16C2223/30—Coating surfaces
Definitions
- the invention relates to polyurethane for use in a roll cover according to the preamble of claim 1, a roll cover which comprises such a polyurethane, and a production method for a polyurethane and such a roll cover.
- rollers in particular for rollers in a plant for the production or processing of a paper web or another fibrous web, often consist of a completely or largely cylindrical roller core, which is usually made of metal.
- a single-layer or multi-layer roll cover is then applied to this roll core.
- This roll cover can consist of one or more polymers.
- the properties of the roller can be adapted and optimized for the intended application by suitably selecting the structure, composition and manufacturing process of these covers.
- PU Polyurethanes
- PU rollers can be manufactured with very different hardnesses, from hard rollers (0 P&J) to very soft rollers with 100 P&J or softer.
- PU covers are usually manufactured using a casting process. It is known that polyurethane covers produced using the casting process generally have excellent mechanical properties and very good hydrolytic stability.
- DE 101 51 485 It is therefore proposed in DE 101 51 485 to avoid the casting process and to produce roll covers from polyurethane in an extrusion process or by means of calendered sheets.
- DE 101 51 485 gives the person skilled in the art only vague information on the optimum configuration of the polyurethanes used. It is generally known, for example from US Pat. No. 6,008,312, that there are also thermoplastic polyurethanes and so-called “millable” polyurethanes in addition to cast polyurethanes.
- millable PUs are advantageous for the processes described in DE 101 51 485, since they can be processed using conventional rollers, presses or other equipment known from rubber processing, and can also be applied in particular in an extrusion process.
- the object of the present invention is to further develop the teaching of DE 101 51 485. It is also an object of the invention to propose a material for a roll cover with good mechanical properties and good resistance to hydrolysis.
- the object of the present invention is to propose a class of polyurethanes which can be processed on machines such as are customary in the rubber industry (kneaders, rolling mills, strainers, extruders,).
- Production of roll covers obtainable by converting components a. at least one diisocyanate , b. at least one polycarbonate diol with a molecular weight between 500 and 3000 and c. another diol,
- the NCO/OH ratio is between 0.9 and 0.99, in particular between 0.9 and 0.95.
- NCO/OH ratio ie the molar ratio of the NCO groups of the isocyanates to the OH groups of the polyols, and the determination thereof is well known to those skilled in the art. It is known from the literature that polyurethanes based on polycarbonate diols, as used in the context of the present invention, are notable for excellent mechanical properties and high hydrolytic stability.
- millable PU sometimes also referred to as “millable gum”
- millable gum can be produced on the basis of polycarbonate diols, which can be processed on machines such as are customary in the rubber industry.
- a casting process can be dispensed with, for example, in the manufacture of roll covers.
- the stoichiometry of the components must be strictly observed. It was found that an NCO/OH ratio of 0.90-0.99, in particular 0.90 to 0.95, is optimal. If the deviation is lower, the polymer is not strong enough to be processed on a rolling mill, for example. On the other hand, if the NCO/OH ratio is greater than 0.99, the viscosity is so high that there is no processability here either. With an NCO/OH ratio > 1, crosslinking occurs, which means that processing as is customary in the rubber industry can no longer be carried out.
- Advantageous values for the NCO/OH ratio are, for example, 0.90, 0.91, 0.92, 0.93, 0.94, 0.95, 0.96, 0.97, 0.98 or 0.99.
- the at least one polycarbonate diol is a polycarbonate diol based on pentanediol, hexanediol or 3-methyl-1,5-pentanediol.
- the additional diol is commonly referred to as part of the hard segment.
- the at least one further diol is an unsaturated glycol.
- This can be, for example, a trimethylolpropane monoallyl ether or glycerol monoallyl ether, or a ,1-dihydroxymethylcyclohex-3-ene and 1,2-dihydroxymethylcyclohex-4-ene. This significantly improves the crosslinkability of this millable polyurethane based on polycarbonate diol with peroxide and/or sulfur.
- the at least one diisocyanate can be selected, for example, from the group of methylenediphenyl isocyanates (MDI), naphthylene-1,5-diisocyanates (NDI), isophorone diisocyanates (IPDI), toluene-2,4-diisocyanates (TDI) or H12MDI.
- MDI methylenediphenyl isocyanates
- NDI naphthylene-1,5-diisocyanates
- IPDI isophorone diisocyanates
- TDI toluene-2,4-diisocyanates
- H12MDI H12MDI
- polyurethanes according to various aspects of this invention can also, for example, contain two or more different polycarbonate diols and/or diisocyanates and/or additional diols can be used.
- stabilizers such as phenolic antioxidants and / or organic phosphites.
- these usually do not account for more than 1-5 per thousand of the total amount.
- Suitable fillers may also be added to polyurethanes according to aspects of this invention.
- various properties of the material, but also of a roller made with it, can be adjusted in a very targeted manner.
- structure-reinforcing fillers are added to the polyurethane.
- Structure-reinforcing fillers can be, for example, a suitable carbon black and/or a precipitated silicic acid and/or a pyrogenic silicic acid.
- the silica can be uncoated or coated with e.g. vinyltriethoxysilane. In the case of vulcanization with sulfur, a coating with Si69 (bis[3-(triethoxysilyl)propyl]tetrasulfide) can be advantageous.
- the object is achieved by a roll cover for a roll, in particular for use in a plant for the production or processing of a fibrous web, characterized in that the roll cover is made entirely or partially of a polyurethane according to one aspect of this invention.
- Such a roller usually has a completely or largely cylindrical roller core, which is usually made of metal.
- the roll cover is applied to this roll core.
- the roll cover consists of several layers for reasons of simpler production or to achieve a suitable property profile built up.
- one, several or all layers can be composed of a polyurethane according to aspects of this invention.
- a process for producing a polyurethane for the production of roll covers which comprises the following steps: a) providing at least one diisocyanate, at least one polycarbonate diol with a molecular weight between 500 and 3000 and another diol b) mixing of the components, the amounts being chosen such that the NCO/OH ratio is between 0.9 and 0.99, in particular between 0.90 and 0.95. c) tempering the mixture at a temperature between 60°C and 80°C, in particular at 70°C.
- the mixture is usually tempered until free isocyanate groups (NCO groups) can no longer be detected. This usually takes at least 24 hours. A period of between 48 hours and 72 hours has proven itself.
- coagents such as trifunctional and difunctional (meth)acrylic latest, N,N'-m-phenylenedimaleimide, zinc diacrylate, zinc dimethacrylate, poly(butadiene)diacrylate, triallycyanurate, triallyl isocyanurate and/or vinyl poly(butadiene).
- Step d) and/or step e) and/or f) should take place after steps a.) to c.).
- the crosslinking agents and/or fillers and/or coagents can be added to the tempered polymer mixture and mixed with the polymer mixture, for example in a suitable mixing device
- a method for producing a roll cover for a roll is proposed, in particular for use in a plant for producing or processing a fibrous web, which comprises the following steps:
- the roller body can be a roller core. Alternatively, it can also be a roll core to which one or more layers of the roll cover have already been applied.
- the roll cover can still be machined and/or ground. For example, a desired smoothness or surface structure can be produced.
- the following substances can be used, for example:
- Polycarbonate diols or prepolymers based on polycarbonate diols such as Eternacoll P 200D or prepolymers based on polycarbonate diols such as Eternathane 400-7 from UBE.
- TMP allyl ether Trimethylolpropane monoallyl ether
- the NCO/OH ratio is between 0.9 and 0.95 in both examples.
- the NCO/OH ratio can be controlled by adjusting the proportions of the three components. Of all the components, the TMP allyl ether has the lowest molecular weight and therefore the greatest influence on the NCO/OH ratio.
- Fillers for example, such as a suitable carbon black and/or a precipitated silicic acid and/or a pyrogenic silicic acid and/or activators and/or peroxide and/or sulphur/sulphur compounds etc. can then also be mixed into the above formulations.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polyurethanes Or Polyureas (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021109750.9A DE102021109750A1 (de) | 2021-04-19 | 2021-04-19 | Polyurethan, Walzenbezug und Herstellungsverfahren |
| PCT/EP2022/052970 WO2022223162A1 (de) | 2021-04-19 | 2022-02-08 | Polyurethan, walzenbezug und herstellungsverfahren |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4326797A1 true EP4326797A1 (de) | 2024-02-28 |
Family
ID=80684030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22708800.2A Pending EP4326797A1 (de) | 2021-04-19 | 2022-02-08 | Polyurethan, walzenbezug und herstellungsverfahren |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20240218106A1 (zh) |
| EP (1) | EP4326797A1 (zh) |
| CN (1) | CN117255819A (zh) |
| DE (1) | DE102021109750A1 (zh) |
| WO (1) | WO2022223162A1 (zh) |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5124424A (en) * | 1989-04-26 | 1992-06-23 | Nippon Polyurethane Industry Co., Ltd. | Polyurethane resin binder for magnetic recording mediums comprising a polycarbonate polyol |
| US6008312A (en) | 1995-12-01 | 1999-12-28 | Hokushin Corp | Method for producing millable polyurethanes and polyurethane elastomers |
| DE10151485A1 (de) | 2001-10-18 | 2003-05-08 | Schaefer Kg Gummiwalzenfabrik | Verfahren zur Herstellung eines Preßmantels einer Schuhpresse oder eines Preßwalzenbezuges |
| US20070027288A1 (en) * | 2003-05-28 | 2007-02-01 | Hisaaki Matsuda | Keypad made from thermoplastic polyurethane resin and method for forming thereof |
| CN101857670B (zh) * | 2009-04-10 | 2013-04-03 | 拜耳材料科技(中国)有限公司 | 聚氨酯微孔弹性体及其制备方法和应用 |
| EP2814860B1 (en) * | 2012-02-13 | 2020-10-14 | Dow Global Technologies LLC | Elastomers for paper mill equipment |
| DE102013222458A1 (de) | 2013-11-06 | 2015-05-07 | Voith Patent Gmbh | Pressmantel für Presswalze |
| WO2014198657A1 (de) * | 2013-06-10 | 2014-12-18 | Voith Patent Gmbh | Walzenbezug |
| JP6241389B2 (ja) * | 2013-07-31 | 2017-12-06 | 三菱ケミカル株式会社 | ポリカーボネートジオールの製造方法及びポリウレタンの製造方法 |
| DE102016114013A1 (de) | 2016-07-29 | 2018-02-01 | Voith Patent Gmbh | Walzenbezug sowie Walze und deren Verwendung |
| JP7387960B2 (ja) * | 2018-09-17 | 2023-11-29 | ディーエスエム アイピー アセッツ ビー．ブイ． | ポリウレタン賦形剤 |
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2021
- 2021-04-19 DE DE102021109750.9A patent/DE102021109750A1/de active Pending
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2022
- 2022-02-08 WO PCT/EP2022/052970 patent/WO2022223162A1/de active Application Filing
- 2022-02-08 EP EP22708800.2A patent/EP4326797A1/de active Pending
- 2022-02-08 US US18/556,147 patent/US20240218106A1/en active Pending
- 2022-02-08 CN CN202280029177.7A patent/CN117255819A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US20240218106A1 (en) | 2024-07-04 |
| CN117255819A (zh) | 2023-12-19 |
| WO2022223162A1 (de) | 2022-10-27 |
| DE102021109750A1 (de) | 2022-10-20 |
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