WO2012168986A1 - 汚染防止剤組成物 - Google Patents
汚染防止剤組成物 Download PDFInfo
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- WO2012168986A1 WO2012168986A1 PCT/JP2011/003322 JP2011003322W WO2012168986A1 WO 2012168986 A1 WO2012168986 A1 WO 2012168986A1 JP 2011003322 W JP2011003322 W JP 2011003322W WO 2012168986 A1 WO2012168986 A1 WO 2012168986A1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B17/00—Methods preventing fouling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
- B32B27/283—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
- C08L83/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
- C09D183/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/643—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain
- D06M15/6436—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain containing amino groups
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/13—Silicon-containing compounds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/59—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/24—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/32—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming a linkage containing silicon in the main chain of the macromolecule
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/02—Agents for preventing deposition on the paper mill equipment, e.g. pitch or slime control
- D21H21/04—Slime-control agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B2220/00—Type of materials or objects being removed
- B08B2220/01—Adhesive materials
-
- 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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/38—Polysiloxanes modified by chemical after-treatment
- C08G77/382—Polysiloxanes modified by chemical after-treatment containing atoms other than carbon, hydrogen, oxygen or silicon
- C08G77/388—Polysiloxanes modified by chemical after-treatment containing atoms other than carbon, hydrogen, oxygen or silicon containing nitrogen
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31652—Of asbestos
- Y10T428/31663—As siloxane, silicone or silane
Definitions
- the present invention relates to a contamination inhibitor composition, and more particularly to a contamination inhibitor composition that can sufficiently prevent pitch contamination in a dry part.
- the paper making process for producing paper is generally performed by placing a liquid in which pulp is dispersed in water on a paper making net (wire) and letting the excess water spontaneously fall into a wet paper and wet paper. Passing between a pair of press rolls and pressing with a press roll through a felt, the moisture in the wet paper is transferred to the felt, thereby dehydrating the wet paper, and the wet paper that has passed through the press part. And a dry part that is dried by bringing it into contact with a heated cylinder, and a reel part that winds the paper on a rod called a spool.
- dry part part has a problem that the pitch adheres to the surfaces of cylinders, canvases, calender rolls, breaker stack rolls and the like (hereinafter collectively referred to as “dry part part”). If pitch adheres to these, paper will be polluted and a yield will fall large.
- a dirt adhesion preventing agent for preventing adhesion of pitch is known (for example, see Patent Document 1).
- a stain adhesion preventing agent has a composition containing silicone oils having different viscosities and a fluorosurfactant.
- a paper machine antifouling composition which is supplied to a paper machine and mainly comprises a side chain type modified silicone oil or a side chain both terminal type modified silicone oil (see Patent Document 2).
- the side chain of the modified silicone oil has a side chain substituted with an amino group or an epoxy group.
- JP 7-292382 A Japanese Patent No. 3388450
- the antifouling composition described in Patent Document 2 has high fixability to a roll of a paper machine, and can impart release or water repellency to the roll immediately after the application, but the structure of the amino-modified group Further, depending on the number of amino-modified groups per molecule of the polysiloxane compound, the adhesion of pitch cannot be sufficiently prevented.
- the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a contamination inhibitor composition that can sufficiently prevent adhesion of pitch to a dry part site.
- the present invention is (1) a contamination inhibitor composition for preventing pitch contamination in a dry part of a papermaking process, comprising a polysiloxane compound represented by the following formula (1), and amino acids per molecule of the polysiloxane compound:
- the antifouling agent composition has 0.5 to 5 modifying groups.
- the substituent R 1 represents a methyl group or an amino-modified group represented by the following formula (2)
- the repeating number n of siloxane units represents an integer of 50 to 1,000.
- the substituent R 2 and the substituent R 3 each independently represent an alkylene group having 1 to 6 carbon atoms, and the repeating number m of the aminoalkylene unit represents an integer of 0 to 2.
- the present invention resides in (2) the antifouling agent composition according to the above (1), wherein the number m of repeating aminoalkylene units in the amino-modified group represented by the formula (2) is 1.
- the present invention relates to (3) above (1) or (2), wherein the substituent R 2 and the substituent R 3 in the amino-modified group represented by the formula (2) are each independently an ethylene group or a propylene group. It resides in the antifouling composition described.
- the present invention relates to (4) the contamination according to the above (1) or (2), wherein the substituent R 2 in the amino-modified group represented by the formula (2) is a propylene group and the substituent R 3 is an ethylene group. Present in the inhibitor composition.
- the present invention provides (6) the antifouling agent composition according to any one of (1) to (5) above, wherein the number of amino-modified groups per molecule of the polysiloxane compound is 0.5 to 3. Exist.
- the antifouling agent composition containing the polysiloxane compound can sufficiently prevent the adhesion of the pitch to the dry part site by being applied to the dry part site.
- the term “pitch” includes an adhesive solid produced in the paper making process, an aggregate of paper powder, and the like.
- the repeating number n of the siloxane unit of the polysiloxane compound represented by the formula (1) is an integer of 50 to 1000, a film can be easily formed on the dry part site, and the amino modification represented by the formula (2)
- the substituent R 2 and the substituent R 3 in the group are each independently an alkylene group having 1 to 6 carbon atoms, and the repeating number m of the aminoalkylene unit is an integer of 0 to 2 to disperse the pitch. It becomes possible.
- the number of repeating aminoalkylene units m in the amino-modified group represented by the formula (2) is 1, and / or the substituent R 2 and the substitution in the amino-modified group
- the groups R 3 are each independently an ethylene group or a propylene group, the effect of dispersing the pitch is further improved.
- FIG. 1 is a schematic view showing a dry part part of a dry part using a contamination inhibitor composition according to the present invention.
- the antifouling agent composition according to this embodiment contains a polysiloxane compound, an emulsifier, and water.
- the antifouling agent composition according to the present embodiment exerts a function of forming a film on the dry part site and dispersing the pitch by being applied to the dry part site. For this reason, this contamination inhibitor composition can sufficiently prevent the adhesion of pitch to the dry part site.
- the polysiloxane compound is represented by the following formula (1).
- the substituent R 1 is a methyl group or an amino-modified group.
- the methyl group and the amino-modified group may be mixed in one molecule of the polysiloxane compound.
- a polysiloxane compound in which all the substituents R 1 are methyl groups and a polysiloxane compound in which at least one of the substituents R 1 is an amino-modified group may be mixed and used.
- the amino-modified group is represented by the following formula (2).
- the substituent R 2 and the substituent R 3 are each independently an alkylene group having 1 to 6 carbon atoms.
- the pitch can be reliably dispersed.
- the substituent R 2 and the substituent R 3 in the amino-modified group are preferably each independently an ethylene group or a propylene group.
- the substituent R 2 and the substituent R 3 are preferably different alkylene groups, and specifically, the substituent R 2 is particularly preferably a propylene group and the substituent R 3 is particularly preferably an ethylene group.
- the repeating number m of the aminoalkylene unit is an integer of 0-2. In the case the number of repetitions m of the aminoalkylene units is 0, the amino modified group has no substituent R 2. When the number of repeating aminoalkylene units m exceeds 3, the effect of dispersing the pitch becomes insufficient. Among these, the number m of repeating aminoalkylene units in the amino-modified group is preferably 1.
- the number of amino-modified groups per molecule of the polysiloxane compound is 0.5 to 5, and preferably 0.5 to 3. If the number of amino-modified groups is less than 0.5, the effect of dispersing the pitch cannot be obtained. In addition, when the number of amino-modified groups exceeds 5, the ionicity increases, and excessive accumulation on the surface of the dry part site results in increased surface stickiness, which tends to cause pitch to be attached. .
- the number of amino-modified groups per molecule means the average number of amino-modified groups contained in one molecule. Specifically, the total number of amino-modified groups is the number of molecules. The value divided by. That is, when the number of amino-modified groups per molecule is 0.1, it means that the total number of amino-modified groups contained in 10 molecules is one.
- the repeating number n of siloxane units is an integer of 50 to 1000, and preferably an integer of 100 to 800.
- the repeating number n of the siloxane unit is less than 50, the formation of a film on the dry part site becomes insufficient, and when the repeating number n of the siloxane unit exceeds 1000, the polysiloxane compound having a high viscosity becomes the dry part site. Since the adhesive adheres to the surface, there is a drawback that the pitch tends to adhere.
- the kinematic viscosity at 25 ° C. of the polysiloxane compound is preferably 20000 mm 2 / s or less, and more preferably 10,000 mm 2 / s or less.
- the pitch cannot be sufficiently dispersed as compared with the case where the kinematic viscosity is within the above range.
- an emulsifier is included in the contamination inhibitor composition according to this embodiment.
- an emulsifier By including an emulsifier, the emulsification stability of the polysiloxane compound is improved.
- the emulsifier a surfactant that emulsifies the polysiloxane compound is used.
- the emulsifier is preferably a nonionic surfactant, and more preferably polyethylene decyl ether, polyethylene cetyl ether, or polyethylene stearyl ether.
- the emulsifier is such a compound, not only the emulsification stability of the polysiloxane compound can be improved, but also color loss of the paper can be suppressed.
- the use of polyethylene alkyl ether having a low molecular weight alkyl group as an emulsifier has the disadvantage that the color of the paper drops and the color of the paper becomes uneven.
- a polyethylene alkyl ether whose alkyl group is a decyl group, a cetyl group or a stearyl group is used as an emulsifier, color loss is suppressed.
- the blending ratio of the polysiloxane compound is preferably 0.1 to 40% by mass, and more preferably 2.0 to 20% by mass from the viewpoint of preventing pitch adhesion.
- the blending ratio of the polysiloxane compound is less than 0.1% by mass, the contamination before the moisture in the antifouling agent composition evaporates as compared with the case where the blending ratio of the polysiloxane compound is within the above range.
- the inhibitor composition itself may be absorbed by the wet paper and the film may not be formed sufficiently.
- the blending ratio of the polysiloxane compound exceeds 40% by mass, the viscosity of the antifouling agent composition itself is increased as compared with the case where the blending ratio of the polysiloxane compound is within the above range, and the dry part site. It is difficult to spread evenly on the surface of the paper, and the tackiness is increased, so that the paper surface may be curled.
- the blending ratio of the emulsifier to 1 part by mass of the polysiloxane compound is preferably 0.05 to 0.4 part by mass, and more preferably 0.1 to 0.2 part by mass.
- the blending ratio of the emulsifier is less than 0.05 parts by mass, the emulsification stability may be insufficient as compared with the case where the blending ratio of the emulsifier is within the above range, and the blending ratio of the emulsifier is 0.00.
- the amount exceeds 4 parts by mass, there is a disadvantage that the degree of color loss of the paper is increased as compared with the case where the blending ratio of the emulsifier is within the above range.
- the antifouling agent composition according to the present embodiment includes a chelating agent, a pH adjusting agent, a preservative, a viscosity adjusting agent, a lubricant, a wetting agent, a dusting preventing agent, a release agent, an adhesive, Additives such as a surface modifier, a cleaning agent, a paper strength enhancer, a sizing agent, a yield improver, a water repellent, an oil repellent, an anti-slip agent, a lubricant, and a softener may be contained.
- Additives such as a surface modifier, a cleaning agent, a paper strength enhancer, a sizing agent, a yield improver, a water repellent, an oil repellent, an anti-slip agent, a lubricant, and a softener may be contained.
- mineral oil such as gear oil, cylinder oil, turbine oil, spindle oil
- vegetable oil such as coconut oil, linseed oil, castor oil, rapeseed oil, corn oil
- paraffins such as liquid paraffin and isoparaffin
- synthetic oils such as polyisobutylene, polybutene, maleated polybutene, polyethylene wax, and microwax.
- the antifouling agent composition is prepared by adding a polysiloxane compound and an emulsifier to water and stirring the mixture, thereby producing an antifouling agent composition in which the polysiloxane compound is emulsified.
- a mixer for such stirring, a mixer, a homogenizer, a mill or the like is appropriately used.
- FIG. 1 is a schematic view showing a dry part part of a dry part using a contamination inhibitor composition according to the present invention. As shown in FIG. 1, the antifouling agent composition is used in dry part D.
- the dry part D includes a paper body W and a plurality of cylindrical cylinders D1, D2, D3, D4, D5, D6, D7 and D8 (hereinafter referred to as “D1 to D8”) for heating and drying the paper body W. ), Canvases K1 and K2 for pressing the paper body against the cylinders D1 to D8, a canvas roll KR for guiding the canvases K1 and K2, and a breaker stack roll B for gently adjusting the smoothness and paper thickness of the dried paper body W And a calender roll C for adjusting the smoothness and paper thickness of the dried paper body W.
- the paper body W is pressed against the surfaces of the rotating cylinders D1 to D8 by the canvases K1 and K2. As a result, the paper body W adheres to the cylinders D1 to D8 and is simultaneously heated and dried. Thereafter, the paper body W is sandwiched between the breaker stack rolls B, and then the paper body W is densified by the calendar roll C.
- the positions of the arrows A with respect to the cylinders D1 to D8, the canvases K1 and K2, the breaker stack roll B, and the calendar roll C of the dry part D The antifouling agent composition is applied directly.
- the method for applying the antifouling agent composition is not particularly limited, and for example, a liquid shower method or a mist-like spray method using a spray nozzle or the like is used.
- the antifouling agent composition may be sprayed while sliding the spray nozzle in the paper width direction. By spraying the antifouling agent composition onto the dry part, pitch contamination is prevented.
- the spraying amount per unit area of the paper through which the antifouling agent composition passes is preferably 10 ⁇ g to 10,000 ⁇ g / m 2 , and preferably 30 ⁇ g to 1000 ⁇ g / m 2 as the solid content of the polysiloxane compound. More preferred.
- the application amount is less than 10 ⁇ g / m 2 , compared to the case where the application amount is within the above range, the antifouling agent composition does not sufficiently adhere to the surface of the dry part part, and the adhesion of the pitch is sufficient. There is a tendency that cannot be suppressed.
- the antifouling composition according to the present embodiment contains an emulsifier, but it is not always necessary to include it if the polysiloxane compound is water-soluble.
- the polysiloxane compound has a methyl group, but some of the methyl groups are epoxy-modified groups, alkyl groups (excluding methyl groups), polyether groups, It may be substituted with a carboxyl group or an aralkyl group. One type of these may exist in one molecule, or a plurality of types may be mixed. In addition, an epoxy alkyl group or an epoxy polyether group is mentioned as an epoxy modification group.
- the antifouling agent composition is applied to the dry part part in the dry part, but it can be applied not only to the dry part but also to the press part and the reel part. is there.
- Example 1 By adding 10% by mass of a polysiloxane compound represented by the following formula (1) and 2.0% by mass of polyethylene decyl ether (emulsifier) to water and stirring with a mixer, a pollution inhibitor composition was obtained. .
- a substituent represented by the following formula (2) was used as the amino-modified group in the polysiloxane compound.
- R 1 other than the amino-modified group is a methyl group.
- the amino-modified groups used are shown in Table 1.
- Example 1 A contamination inhibitor composition was obtained in the same manner as in Example 1 except that a polyetheramino group was used as the amino-modified group.
- Example 2 A contamination inhibitor composition was obtained in the same manner as in Example 1 except that a polyepoxyamino group was used as the amino-modified group.
- the number of repeating siloxane units n of the polysiloxane compound represented by formula (1) is 300, and the number of amino-modified groups per molecule of the polysiloxane compound is 1.1.
- the kinematic viscosity at 25 ° C. was adjusted to 1000 mm 2 / s for evaluation.
- the number of repeating siloxane units n of the polysiloxane compound represented by the formula (1) is 130, and the number of amino-modified groups per molecule of the polysiloxane compound is 1.1.
- the kinematic viscosity at 25 ° C. was adjusted to 250 mm 2 / s for evaluation.
- Cylinder evaluation 1 The cylinder D1 of the cylindrical dryer shown in FIG. 1 (dry part, manufactured by Kobayashi Seisakusho Co., Ltd.) was sprayed with 5 ml / min of the antifouling agent compositions of Examples 1 to 10 and Comparative Examples 1 and 2 and operated for 8 hours The weight of the pitch dropped under the cylinder D1 after measurement was measured. The obtained results are shown in Table 2.
- Cylinder evaluation 2 A doctor blade was provided so that the cutting edge was in contact with the surface of the cylinder D3 of the cylindrical dryer shown in FIG. As a result, when the cylindrical dryer is operated, the pitch attached to the cylinder D3 is scraped to the cutting edge of the doctor blade. Then, 5 ml / min of the antifouling agent compositions of Examples 1 to 10 and Comparative Examples 1 and 2 was sprayed on the cylinder D1, and the weight of the pitch accumulated on the blade edge of the doctor blade after operating for 8 hours was measured. did. The obtained results are shown in Table 2.
- Example 11 to 22 and Comparative Examples 3 to 8 By adding 10% by mass of the polysiloxane compound represented by the above formula (1) and 2.0% by mass of polyethylene decyl ether (emulsifier) to water and stirring with a mixer, a contamination inhibitor composition was obtained. .
- a substituent represented by the following formula (3) was used as the amino-modified group in the polysiloxane compound.
- R 1 other than the amino-modified group is a methyl group.
- Table 3 shows the number of amino-modified groups per molecule of the polysiloxane compound and the number n of repeating siloxane units of the polysiloxane compound represented by the above formula (1) in each Example and Comparative Example.
- the antifouling agent composition of the present invention can sufficiently prevent the adhesion of pitch to the dry part site.
- the antifouling agent composition of the present invention is used by being applied to the dry part when paper is made. According to the antifouling agent composition of the present invention, it is possible to prevent the pitch from adhering to the dry part site, so that the yield in paper production can be greatly improved.
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Abstract
Description
本実施形態に係る汚染防止剤組成物は、ドライパート部位に付与することにより、ドライパート部位に対して皮膜を形成し、且つピッチを分散させる機能を発揮する。このため、該汚染防止剤組成物は、ドライパート部位へのピッチの付着を十分に防止できる。
これらの中でも、アミノ変性基における置換基R2及び置換基R3はそれぞれ独立して、エチレン基又はプロピレン基であることが好ましい。炭素鎖を2~3とすることにより、ピッチを分散させる効果がより向上する。
また、置換基R2及び置換基R3は異なるアルキレン基であることが好ましく、具体的には、置換基R2がプロピレン基であり、置換基R3がエチレン基であることが特に好ましい。
アミノアルキレン単位の繰り返し数mが、3を超えると、ピッチを分散させる効果が不十分となる。
これらの中でも、アミノ変性基におけるアミノアルキレン単位の繰り返し数mは、1であることが好ましい。
アミノ変性基の個数が0.5個未満であると、ピッチを分散する効果が得られない。また、アミノ変性基の個数が5個を超えると、イオン性が高くなり、ドライパート部位の表面上に過剰に蓄積するため、表面のべとつきが大きくなり、かえってピッチが付着しやすくなる欠点がある。
シロキサン単位の繰り返し数nが、50未満であると、ドライパート部位に対する皮膜の形成が不十分となり、シロキサン単位の繰り返し数nが、1000を超えると、粘度が高いポリシロキサン化合物が、ドライパート部位表面に粘着性を帯びて付着するので、かえってピッチが付着しやすくなる欠点がある。
動粘度が20000mm2/sを超えると、動粘度が上記範囲内にある場合と比較して、ピッチを十分に分散できなくなる。また、べとつきが大きくなり、かえってピッチが付着しやすくなる欠点がある。
乳化剤を含むことにより、ポリシロキサン化合物の乳化安定性が向上する。
これらの中でも、乳化剤は、ノニオン界面活性剤であることが好ましく、特に、ポリエチレンデシルエーテル、ポリエチレンセチルエーテル又はポリエチレンステアリルエーテルであることがより好ましい。
ちなみに、段ボール等の着色された紙を抄紙機にて製造する場合、アルキル基が低分子のポリエチレンアルキルエーテルを乳化剤として用いると、紙の色を脱落させ、紙の色が斑になる欠点がある。しかし、アルキル基がデシル基、セチル基、ステアリル基のポリエチレンアルキルエーテルを乳化剤として用いると、色抜けが抑制される。
ポリシロキサン化合物の配合割合が0.1質量%未満であると、ポリシロキサン化合物の配合割合が上記範囲内にある場合と比較して、汚染防止剤組成物中の水分が蒸発する前に、汚染防止剤組成物自体が湿紙に吸収されてしまい、皮膜を十分に形成できない場合がある。一方で、ポリシロキサン化合物の配合割合が40質量%を超えると、ポリシロキサン化合物の配合割合が上記範囲内にある場合と比較して、汚染防止剤組成物自体の粘度が大きくなり、ドライパート部位の表面上に均一に散布しにくく、また、タック性が大きくなり、紙面が毟れる恐れがある。
乳化剤の配合割合が0.05質量部未満であると、乳化剤の配合割合が上記範囲内にある場合と比較して、乳化安定性が不十分となる場合があり、乳化剤の配合割合が0.4質量部を超えると、乳化剤の配合割合が上記範囲内にある場合と比較して、紙の色抜けの度合いが大きくなる欠点がある。
汚染防止剤組成物は、ポリシロキサン化合物と、乳化剤とを、水に加えて撹拌することにより、ポリシロキサン化合物が乳化された汚染防止剤組成物が製造される。
図1は、本発明に係る汚染防止剤組成物を用いるドライパートのドライパート部位を示す概略図である。
図1に示すように、汚染防止剤組成物は、ドライパートDで用いられる。
その後、紙体Wは、ブレーカースタックロールBに挟持され、次いで、紙体Wは、カレンダーロールCにより高密度化される。
ここで、汚染防止剤組成物の付与方法は特に限定されず、例えば、散布ノズル等を用いて液状のシャワー方式や霧状の噴霧方式等が用いられる。このとき、散布ノズルを紙幅方向にスライドさせながら、汚染防止剤組成物を吹きつけてもよい。汚染防止剤組成物をドライパートに吹き付けることにより、ピッチ汚染が防止される。
散布量が10μg/m2未満であると、散布量が上記範囲内にある場合と比較して、汚染防止剤組成物が十分にドライパート部位の表面に付着せず、ピッチの付着を十分に抑制できない傾向にある。また、散布量が10000μg/m2を超えると、散布量が上記範囲内にある場合と比較して、余剰分がドライパート部位の表面上に蓄積し、ピッチを巻き込んで汚れを増大させたり、カンバスの目を詰まらせてしまう虞がある。
なお、エポキシ変性基としては、エポキシアルキル基又はエポキシポリエーテル基が挙げられる。
下記式(1)で表されるポリシロキサン化合物10質量%と、ポリエチレンデシルエーテル(乳化剤)2.0質量%と、を水に加え、ミキサーで撹拌することにより、汚染防止剤組成物を得た。
ポリシロキサン化合物におけるアミノ変性基としては、下記式(2)で表される置換基を用いた。なお、アミノ変性基以外のR1は、メチル基である。
用いたアミノ変性基を表1に示す。
アミノ変性基として、ポリエーテルアミノ基を用いたこと以外は、実施例1と同様にして、汚染防止剤組成物を得た。
アミノ変性基として、ポリエポキシアミノ基を用いたこと以外は、実施例1と同様にして、汚染防止剤組成物を得た。
実施例1~10及び比較例1,2で得られた汚染防止剤組成物に対し、後述する、シリンダ評価1、シリンダ評価2、カンバス評価1、カンバス評価2を行った。
シリンダ評価1、シリンダ評価2においては、式(1)で表されるポリシロキサン化合物のシロキサン単位の繰り返し数nを300とし、ポリシロキサン化合物の1分子あたりのアミノ変性基の個数を1.1個、25℃における動粘度を1000mm2/sに調整して評価を行った。
カンバス評価1、カンバス評価2においては、式(1)で表されるポリシロキサン化合物のシロキサン単位の繰り返し数nを130とし、ポリシロキサン化合物の1分子あたりのアミノ変性基の個数を1.1個、25℃における動粘度を250mm2/sに調整して評価を行った。
図1に示す円筒状ドライヤ(ドライパート、株式会社小林製作所製)のシリンダD1に、実施例1~10及び比較例1,2の汚染防止剤組成物を、5ml/min散布し、8時間稼動させた後のシリンダD1下に落下したピッチの重量を測定した。得られた結果を表2に示す。
図1に示す円筒状ドライヤのシリンダD3の表面に、刃先が接するようにドクターブレードを設けた。これにより、円筒状ドライヤを稼動させるとシリンダD3に付着したピッチがドクターブレードの刃先に掻き集められることになる。
そして、シリンダD1に、実施例1~10及び比較例1,2の汚染防止剤組成物を、5ml/min散布し、8時間稼動させた後のドクターブレードの刃先に蓄積したピッチの重量を測定した。得られた結果を表2に示す。
図1に示す円筒状ドライヤのカンバスK1に、実施例1~10及び比較例1,2の汚染防止剤組成物を、5ml/min散布し、1週間稼動させた。
そして、カンバスK1の1m2あたりにおける直径5mm以上のピッチの付着数を計測した。得られた結果を表2に示す。
図1に示す円筒状ドライヤのカンバスK1に、実施例1~10及び比較例1,2の汚染防止剤組成物を、5ml/min散布し、1週間稼動させた。
そして、カンバスK1を案内するアウトロールKR1に付着したピッチを掻き取り、ピッチの重量を測定した。得られた結果を表2に示す。
上記式(1)で表されるポリシロキサン化合物10質量%と、ポリエチレンデシルエーテル(乳化剤)2.0質量%と、を水に加え、ミキサーで撹拌することにより、汚染防止剤組成物を得た。
ポリシロキサン化合物におけるアミノ変性基としては、下記式(3)で表される置換基を用いた。なお、アミノ変性基以外のR1は、メチル基である。
また、各実施例及び比較例におけるポリシロキサン化合物1分子あたりのアミノ変性基の個数と、上記式(1)で表されるポリシロキサン化合物のシロキサン単位の繰り返し数nと、を表3に示す。
実施例11~22及び比較例3~8で得られた汚染防止剤組成物に対し、上述した、シリンダ評価1、シリンダ評価2、カンバス評価1、カンバス評価2を行った。
得られた結果を表4に示す。
C・・・カレンダーロール
D・・・ドライパート
D1,D2,D3,D4,D5,D6,D7,D8・・・シリンダ
K1,K2・・・カンバス
KR・・・カンバスロール
KR1・・・アウトロール
W・・・紙体
Claims (6)
- 前記式(2)で表されるアミノ変性基におけるアミノアルキレン単位の繰り返し数mが1である請求項1記載の汚染防止剤組成物。
- 前記式(2)で表されるアミノ変性基における置換基R2及び置換基R3がそれぞれ独立して、エチレン基又はプロピレン基である請求項1又は2に記載の汚染防止剤組成物。
- 前記式(2)で表されるアミノ変性基における置換基R2がプロピレン基であり、置換基R3がエチレン基である請求項1又は2に記載の汚染防止剤組成物。
- 前記式(1)で表されるポリシロキサン化合物におけるシロキサン単位の繰り返し数nが100~800の整数である請求項1~4のいずれか1項に記載の汚染防止剤組成物。
- 前記ポリシロキサン化合物1分子あたりのアミノ変性基の個数が0.5~3個である請求項1~5のいずれか1項に記載の汚染防止剤組成物。
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