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US20080021143A1 - Polyamide moulding compound and use thereof - Google Patents

Polyamide moulding compound and use thereof Download PDF

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Publication number
US20080021143A1
US20080021143A1 US11/775,571 US77557107A US2008021143A1 US 20080021143 A1 US20080021143 A1 US 20080021143A1 US 77557107 A US77557107 A US 77557107A US 2008021143 A1 US2008021143 A1 US 2008021143A1
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US
United States
Prior art keywords
polyamide
moulding compound
weight
compound according
polyamide moulding
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.)
Abandoned
Application number
US11/775,571
Other languages
English (en)
Inventor
Helmut Thullen
Christian Rytka
Friedrich-Severin Buehler
Ralf Hala
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EMS Chemie AG
Original Assignee
EMS Chemie AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by EMS Chemie AG filed Critical EMS Chemie AG
Assigned to EMS-CHEMIE AG reassignment EMS-CHEMIE AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BUEHLER, FRIEDRICH-SEVERIN, HALA, RALF, RYTKA, CHRISTIAN, THULLEN, HELMUT
Publication of US20080021143A1 publication Critical patent/US20080021143A1/en
Priority to US12/850,369 priority Critical patent/US8309643B2/en
Abandoned legal-status Critical Current

Links

Classifications

    • 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
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/14—Glass
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • 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
    • 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
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • 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
    • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
    • C08K3/013—Fillers, pigments or reinforcing additives
    • 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
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y10T428/1372—Randomly noninterengaged or randomly contacting fibers, filaments, particles, or flakes

Definitions

  • the present invention relates to polyamide moulding compounds which have very low distortion with good mechanical properties. This is achieved by a combination of transparent polyamide with fibrous reinforcing materials and also particulate fillers.
  • the moulding compounds according to the invention are used for the production of any moulded articles, semi-finished products or finished products.
  • Polyamides are widespread nowadays as structural elements for the interior and exterior sphere, which can be attributed essentially to the outstanding mechanical properties.
  • particulate fillers effects, on the one hand, a reduction in the distortion but leads, on the other hand, to an impairment with respect to the mechanical properties, such as strength and breaking elongation.
  • the polyamide moulding compound according to the invention comprises 40 to 79% by weight at least of a transparent polyamide, 15 to 49% by weight at least of a fibrous reinforcing material and 6 to 30% by weight of a particulate filler.
  • further additives can be contained as complement to 100% by weight.
  • Preferred compositions comprise 40 to 69% by weight, preferably 40 to 55% by weight, of the transparent polyamide, 25 to 49% by weight, preferably 30 to 49% by weight, of the fibrous reinforcing material, 6 to 30% by weight of the particulate filler and also if necessary, as complement to 100% by weight, at least one further additive.
  • polyamide oligomers are examples of polyamide oligomers.
  • a particular feature of the present invention is that good mechanical properties can be achieved by moulded articles produced herefrom by the claimed combination on the one hand and the moulded articles according to the invention have at the same time a substantially lower distortion in comparison with known moulded articles.
  • whiskers needle-like monocrystals comprising metals, oxides, borides, carbides, nitrides, polytitanate, carbon etc. with a generally polygonal cross-section, e.g. potassium nitanate-, aluminium oxide-, silicon carbide-whiskers.
  • whiskers have a diameter of 0.1 to 10 ⁇ m and a length in the mm to cm range. At the same time, they have high tensile strength. Whiskers can be produced by deposition from the gas phase in the solid (VS mechanism) or from a three-phase system (VLS mechanism).
  • the glass fibres preferably have a diameter of 5 to 20 ⁇ m and particularly preferred of 5 to 10 ⁇ m. Preferably, glass fibres with a round, oval or rectangular cross-section are used.
  • the glass fibres thereby comprise preferably E-glass.
  • the glass fibres can thereby be added as endless fibres or as cut glass fibres, the fibres being able to be equipped with a suitable sizing system and a bonding agent or bonding agent system, e.g. on a silane basis.
  • particulate fillers All the fillers known to the person skilled in the art are possible as particulate fillers. There are included herein in particular particulate fillers selected from the group comprising talcum, mica, silicates, quartz, titanium dioxide, wollastonite, kaolin, silicic acids, magnesium carbonate, magnesium hydroxide, chalk, ground or precipitated calcium carbonate, lime, feldspar, barium sulphate, permanently magnetic or magnetisable metals or alloys, glass balls, hollow glass balls, hollow spherical silicate fillers and mixtures thereof.
  • particulate fillers selected from the group comprising talcum, mica, silicates, quartz, titanium dioxide, wollastonite, kaolin, silicic acids, magnesium carbonate, magnesium hydroxide, chalk, ground or precipitated calcium carbonate, lime, feldspar, barium sulphate, permanently magnetic or magnetisable metals or alloys, glass balls, hollow glass balls, hollow spherical silicate fillers and mixtures thereof.
  • Transparent polyamides in the sense of the present invention are polyamides which have a defined light transmission.
  • the polyamides the light transmission of which is at least 70%, are included herein if the polyamide is present in the form of a plate, e.g. a round plate, with a thickness of 2 mm. Round plates of 75 ⁇ 2 mm are produced on an Arburg injection moulding machine in the polished mould, the cylinder temperature being between 240 and 340° C. and the mould temperature between 20 and 140° C.
  • the measurement of the light transmission is implemented according to ASTM D 1003-61 on the measuring apparatus Haze Gard plus by the Byk Gardner company with CIE light type C at 23° C. The light transmission value is thereby indicated in % of the irradiated light quantity.
  • Preferably transparent polyamides which have a light transmission of at least 86%, particularly preferred of at least 90%, are used.
  • the composition of the transparent polyamides so that all the transparent polyamides or mixtures thereof which are known to the person skilled in the art can be used.
  • the polyamides which are produced from at least one diamine and at least one dicarboxylic acid and/or at least one amino acid or a lactam.
  • diamine aliphatic and/or cycloaliphatic diamines with 6 to 17 C-atoms and/or diamines (C 6 -C 17 ) with partially aromatic structures.
  • dicarboxylic acids aliphatic and/or aromatic dicarboxylic acids with 6 to 12 C-atoms.
  • the amino acids are selected preferably from the group of ⁇ , ⁇ amino acids with 6 to 12 C-atoms.
  • the lactams are preferably selected from the group of lactams with 6 to 12 C-atoms.
  • the transparent polyamides have a relative viscosity of 1.36-1.80, preferably 1.36-1.74, particularly preferred 1.41-1.69.
  • the relative viscosity is thereby determined according to DIN EN ISO 307, in 0.5% m-cresol solution at 20° C.
  • the transparent polyamides have a glass transition temperature (Tg) of at least 120° C., preferably at least 130° C.
  • Tg glass transition temperature
  • the glass transition temperature is thereby determined by means of differential scanning calorimetry (DSC) at a heating rate of 20° C./min according to the ISO standard 11357-1/-2. The temperature at the turning point is indicated.
  • Transparent, amorphous polyamides are preferred.
  • the polyamides which, in the dynamic differential scanning calorimetry (DSC) according to ISO 1357-1/-2, at a heating rate of 20° C./min, have a melting heat of at most 5 J/g, preferably at most 3 J/g and particularly preferred at most 1 J/g.
  • the transparent amorphous polyamides are produced preferably from at least one diamine and at least one dicarboxylic acid and/or at least one amino acid or a lactam.
  • Aliphatic and/or cycloaliphatic diamines with 6 to 17 C-atoms and/or diamines (C 6 -C 17 ) with partially aromatic structures are preferred as diamine.
  • the amino acids are selected preferably from the group ⁇ , ⁇ amino acids with 6 to 12 C-atoms.
  • the lactams are selected preferably from the group of lactams with 6 to 12 C-atoms
  • the transparent amorphous polyamides have a relative viscosity of 1.36-1.80, preferably 1.36-1,74, particularly preferred 1.41-1.69.
  • the relative viscosity is thereby determined according to DIN EN ISO 307, in 0.5% m-cresol solution at 20° C.
  • the transparent amorphous polyamides have a glass transition temperature (Tg) of at least 120° C., preferably at least 130° C.
  • Tg glass transition temperature
  • the glass transition temperature is thereby determined by means of differential scanning calorimetry (DSC) at a heating rate of 20° C./min according to the ISO standard 11357-1/-2. The temperature at the turning point is indicated.
  • Preferred transparent amorphous polyamides are selected from the following group: PA 6I, PA 6I/6T, PA MXDI/6I, PA MXDI/MXDT/6I/6T, PA MXDI/12I, PA MXDI, PA MACM12, PA MACMI/12, PA MACMI/MACMT/12, PA 6I/MACMI/12, PA 6I/6T/MACMI/MACMT, PA 6I/6T/MACMI/MACMT/12, PA MACM6/11, PA MACMI/MACM12 and mixtures thereof.
  • the MACM can thereby be replaced by PACM up to 55% by mol, in particular up to 50% by mol.
  • base material MACM-containing transparent amorphous polyamides or mixtures thereof which have respectively a relative viscosity of 1.41-1.69, preferably 1.49-1.69.
  • Their glass transition temperature is at least 130° C., preferably at least 145° C.
  • a transparent amorphous polyamide is used as base material from the group MACM 12, MACMI/12 and mixtures thereof which have respectively a relative viscosity of 1.41-1.69, preferably 1.49-169.
  • Their glass transition temperature is at least 130° C., preferably at least 145° C.
  • thermoplastic polyamide moulding compounds according to the invention can contain in addition normal additives which are known in general to the person skilled in the art and are selected from the group comprising impact strength modifiers, preferably so-called MBS or core-outer layer impact strength modifiers, e.g.
  • halogen-containing flameproofing agents based on methacrylate-butadiene-styrene, bonding agents, halogen-containing flameproofing agents, halogen-free flameproofing agents, stabilisers, age-protecting agents, antioxidants, antiozonants, light protection agents, UV stabilisers, UV absorbers, UV blockers, inorganic heat stabilisers, organic heat stabilisers, conductivity additives, carbon black, optical lighteners, processing aids, nucleation agents, crystallisation accelerators, crystallisation inhibitors, flow aids, lubricants, mould-release agents, softeners, pigments, colourants, marking materials and mixtures thereof.
  • the polyamide moulding compounds according to the invention can contain, for specific purposes, in addition also other polymers, such as polyolefins, AN polymers, functionalised copolyolefins and ionomers.
  • the polyamide moulding compound contains from 21 to 60% by weight, preferably from 31 to 60% by weight, specially preferred from 45 to 60% by weight, particularly preferred from 45 to 55% by weight, of the fibrous reinforcing materials and the particulate fillers in total.
  • the reinforcing materials are always present in at least the same quantity (% by weight) as the fillers.
  • the invention comprises in addition moulded articles produced with the above-described moulding compound.
  • These moulded articles preferably have a distortion of ⁇ 2.7 %, particularly preferred ⁇ 2.3%. It should be emphasised thereby that, despite this low distortion, the mechanical properties of the moulded articles remain unaffected.
  • the moulded article preferably has a modulus of elasticity in tension of ⁇ 8000 MPa, in particular ⁇ 10000 MPa. With respect to the tensile strength, values ⁇ 100 MPa, and in particular ⁇ 140 MPa are preferred.
  • the polyamide moulding compound preferably has a breaking elongation of ⁇ 1.5%, particularly preferred ⁇ 2.0%.
  • the invention also relates to the use of the above-described moulding compounds for the production of distortion-free moulded articles.
  • the moulded articles are hereby selected preferably from the group comprising precisely fitting parts, mutually moveable parts, functional elements, operating elements, tracking elements, adjustment elements, carrier elements, frame elements, switches and housings in the field of electrics, electronics, energy and drive technology, mechanical engineering, automobiles, furniture, sport, sanitary, hygiene, medical technology, transport means, telecommunications, entertainment electronics, domestic appliances or electrical tools, produced by injection moulding, extrusion or other shaping technologies, e.g. functional carriers in the cockpit area of an automobile, frame components of a sewing machine, mobile phone housings.
  • the production of the polyamide moulding compounds according to the invention can be effected on normal compounding machines, such as e.g. single or twin-screw extruders or screw kneaders.
  • the polymer component is melted and the reinforcing material and/or filler is fed into the melt at any points of the extruder, e.g. by means of a side feeder.
  • the compounding is effected preferably at set cylinder temperatures of 260° C. to 320° C.
  • the polymer component and the reinforcing material and/or filler can however also all be metered into the feed.
  • the moulding compounds were produced on a twin-screw extruder of the company Werner & Pfleiderer, type ZSK 25. Both the polyamide granulates and the mineral were thereby metered into the feed via separate scales. The glass fibre was conveyed into the polymer melt via a side feeder 6 housing units before the nozzle.
  • the temperature of the first housing was set at 100° C., that of the remaining housings at 280° C. A speed of rotation of 200 rpm and a throughput of 10 kg/h was used and degassed atmospherically. The strands were cooled in the water bath, cut and the obtained granulate was dried at 120° C. for 24 h.
  • moulding compounds were processed as follows into test bodies and tested.
  • “Visitor card holders” were produced on an injection moulding machine of the Ferromatik company, model K85 D-S/2F, at set cylinder temperatures of 270-290° C. and a mould temperature of 80-100° C.
  • the distortion was determined by means of an injection-moulded “Visitor card holder” (see FIG. 1 in this respect). After storage of 14 days in a normal atmosphere (23° C., 50% relative humidity), the width is measured and compared to the mould dimension (width of the cavity: 90.2 mm). The greater the difference, the greater is the distortion.
  • ISO-test bar standard: ISO/CD 3167, type A1, 170 ⁇ 20/10 ⁇ 4 mm, temperature 23° C.
  • ISO-test bar standard: ISO/CD 3167, type A1, 170 ⁇ 20/10 ⁇ 4 mm, temperature 23° C.
  • ISO-test bar standard: ISO/CD 3167, type B1, 80 ⁇ 10 ⁇ 4 mm, temperature 23° C.
  • ISO-test bar standard: ISO/CD 3167, type B1, 80 ⁇ 10 ⁇ 4 mm, temperature 23° C.
  • test bodies apart from the “Visitor card holders”, were used in the dry state.
  • the test bodies were stored after the injection moulding for at least 48 h at room temperature in dry surroundings.
  • TPS Terephthalic acid (T) TPS Terephthalic acid
  • Table 2 shows the composition of examples 1 to 5 according to the invention and the herewith associated test results with respect to the distortion and mechanical properties.
  • Table 3 shows the composition of examples 6 to 10 according to the invention with associated distortion and mechanical properties.
  • Table 4 shows the composition of the comparative examples 11 to 16 with associated test results.
  • Table 5 shows the composition of the comparative examples 17 to 19 with associated test results.
  • Table 5 shows the composition of the comparative examples 17 to 19 with associated test results.
  • Table 5 shows the composition of the comparative examples 17 to 19 with associated test results.
  • Table 5 shows the composition of the comparative examples 17 to 19 with associated test results.
  • TABLE 2 Examples Number Materials Unit 1 2 3 4 5 MACM12 % by 40 55 40 40 50 weight MACMI/12 % by — — — — — weight 6I/6T/MACMI/MACMT % by — — — — weight 6I/6T % by — — — — weight Glass fibres % by 30 30 30 40 40 weight Calcium carbonate % by 30 15 — 20 10 weight Kaolin % by — — 30 — — weight Tests 1 2 3 4 5 Distortion % 2.05 1.59 2.05 2.09 2.70 Modulus of elasticity in MPa 10230 8110 10630 11760 10260 tension Tensile strength MPa 144 141 110
  • the “Visitor card holders” produced from the moulding compounds of the examples according to the invention show without exception a lower distortion than those made of the moulding compounds of the comparative examples.
  • test bodies made of the moulding compound no. 11 with an amorphous PC/ABS blend as basis show in fact the lowest distortion in the comparative examples but even this is still higher than that of the test bodies made of the moulding compounds according to the invention.
  • test bodies made of the comparative moulding compounds (nos. 13-16 and 18, 19) which are based on partially crystalline polyamides have a significantly higher distortion still.
  • test bodies made of solely reinforced comparative moulding compounds with an amorphous polyamide as basis have higher distortion than those of the moulding compounds according to the invention with reinforcing materials and fillers.
  • the comparative examples show in addition that high moduli of elasticity in tension generally are accompanied by high distortion.
  • the moulding compound no. 11 in fact provides the test bodies with the lowest distortion within the comparative examples but these also have the lowest modulus of elasticity in tension.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
US11/775,571 2006-07-11 2007-07-10 Polyamide moulding compound and use thereof Abandoned US20080021143A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/850,369 US8309643B2 (en) 2006-07-11 2010-08-04 Polyamide moulding compound and use thereof

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06014372.4A EP1882719B1 (de) 2006-07-11 2006-07-11 Polyamidformmasse und deren Verwendung
EP06014372.4 2006-07-11

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US (2) US20080021143A1 (ja)
EP (1) EP1882719B1 (ja)
JP (1) JP5335208B2 (ja)
KR (1) KR101245577B1 (ja)
CN (1) CN101104733B (ja)
AR (1) AR061864A1 (ja)
BR (1) BRPI0703310A (ja)
TW (1) TWI435912B (ja)

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US20080167415A1 (en) * 2006-12-28 2008-07-10 Georg Stoeppelmann Polyamide molding materials reinforced with flat glass fibers and injection molded parts made thereof
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US20090247699A1 (en) * 2008-03-31 2009-10-01 Friedrich Severin Buehler Polyamide moulding compound for varnish-free, tough casings with a high-gloss surface
US20130197150A1 (en) * 2010-10-13 2013-08-01 Solvay Specialty Polymers Usa, Llc Stain-resistant articles
US20130231431A1 (en) * 2010-10-13 2013-09-05 Solvay Specialty Polymers Usa, Llc Stain-resistant articles
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CN104231613A (zh) * 2014-08-27 2014-12-24 南京聚隆科技股份有限公司 一种注塑级聚酰胺复合材料及其制备方法
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CN105504805A (zh) * 2015-12-30 2016-04-20 天津金发新材料有限公司 一种用于制备异型隔热条的聚酰胺组合物及其制备方法
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CN112080136A (zh) * 2019-06-12 2020-12-15 阮伟 一种led灯用的无卤高阻燃导热尼龙复合材料
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US10166441B2 (en) 2009-03-13 2019-01-01 Acushnet Company Three-cover-layer golf ball having transparent or plasticized polyamide intermediate layer
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US10406402B2 (en) 2012-02-29 2019-09-10 Acushnet Company Golf balls containing layers made from transparent polyamide and plasticizer compositions
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US9415268B2 (en) 2014-11-04 2016-08-16 Acushnet Company Polyester-based thermoplastic elastomers containing plasticizers for making golf balls
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EP2703435B1 (de) 2012-08-28 2014-09-24 Ems-Patent Ag Polyamidformmasse und deren Verwendung
EP2716716B1 (de) 2012-10-02 2018-04-18 Ems-Patent Ag Polyamid-Formmassen und deren Verwendung bei der Herstellung von Formkörpern
SI2746339T1 (sl) 2012-12-18 2015-05-29 Ems-Patent Ag Poliamidna oblikovalna masa in oblikovalni deli proizvedeni iz enakega
CN103881372A (zh) * 2012-12-21 2014-06-25 苏州翰普高分子材料有限公司 抗白蚁缆线护套聚酰胺组合物、缆线护套、制法和用途
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US20100297373A1 (en) 2010-11-25

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