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WO1994029381A1 - Preparation d'une matiere de moulage a base de novolaque pour collecteurs - Google Patents

Preparation d'une matiere de moulage a base de novolaque pour collecteurs Download PDF

Info

Publication number
WO1994029381A1
WO1994029381A1 PCT/DE1994/000596 DE9400596W WO9429381A1 WO 1994029381 A1 WO1994029381 A1 WO 1994029381A1 DE 9400596 W DE9400596 W DE 9400596W WO 9429381 A1 WO9429381 A1 WO 9429381A1
Authority
WO
WIPO (PCT)
Prior art keywords
molding composition
composition according
molding
fibers
weight
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.)
Ceased
Application number
PCT/DE1994/000596
Other languages
German (de)
English (en)
Inventor
Werner Baun
Ursula Glatz
Frank Ludwig
Thomas Moser
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to EP94915506A priority Critical patent/EP0703944A1/fr
Publication of WO1994029381A1 publication Critical patent/WO1994029381A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/88—Adding charges, i.e. additives
    • B29B7/90—Fillers or reinforcements, e.g. fibres
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/10—Making granules by moulding the material, i.e. treating it in the molten state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/12—Making granules characterised by structure or composition
    • B29B9/14—Making granules characterised by structure or composition fibre-reinforced
    • 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
    • B29K2061/00—Use of condensation polymers of aldehydes or ketones or derivatives thereof, as moulding material
    • B29K2061/04—Phenoplasts
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/12—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of short lengths, e.g. chopped filaments, staple fibres or bristles
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/16—Fillers

Definitions

  • the invention relates to glass fiber reinforced phenoplasts, in particular for collectors and commutators of electric motors in accordance with the preamble of the main claim.
  • molding compounds with novolaks are described.
  • Conventional molding compounds, including novolak molding compounds are usually mechanically stabilized or reinforced by fibers and fabrics.
  • the proportion of phenolic resin, especially novolak is usually 30-50 percent by weight of the total mass of the molding composition.
  • Phenolic resin molding compositions, in particular novolak molding compositions are therefore usually prepared on heated roller mills or by use with extruders.
  • the molding compound is obtained in flatbread, which are ground. Grains of dust with an amount of up to 15 percent by weight of the molding compound inevitably form as undesirable by-products, which means that filters that are frequently changed have to be used.
  • a disadvantage of the preparation in the fluid mixer is that, with conventional resin contents, sufficient fiber impregnation becomes inadequate and reproducible novolak molding compound preparation cannot be guaranteed. Further disadvantages come to light in the case of high proportions of filler in the molding compound, because no granules but woolly products with low filler contents, because undefined conglomerates are created as products.
  • the object of the invention is to produce asbestos-free, plasticizable and / or compressible molding compositions based on phenolic resins, especially solid novolak resins, in a fluid mixer, which meet the above-mentioned property profile for the manufacture of collectors for electric motors.
  • Glass fibers Has fillers.
  • the replacement of asbestos takes into account the legal asbestos ban and the avoidance of carcinogenic substances.
  • the measures and procedural details listed in the subclaims bring about numerous improvements over the general features given in the main claim. It is possible to achieve a homogeneous mixing of the individual components and reliable impregnation of fibers of the molding compound in the molding compound production and to avoid melting of the phenolic resin by a clever choice of the processing temperature.
  • the mechanical stability can be set by the ratio of the long-fiber to the short-fiber glass fractions as well as the mineral fillers and the mixtures of mineral fillers and their respective proportions of the total mass of the molding composition.
  • Suitable solid novolak resins and modified novolak resins are readily available commercially.
  • the proportion of the novolak resin component or a corresponding mixture of the phenolic resin component in the total mass of the molding composition was a minimum of 20 to a maximum of 30 percent by weight.
  • Hexamethylenetetramine is used as the crosslinker in a proportion of 0.1 to 4 percent by weight based on the total mass of the molding composition. Occasionally, epoxy-modified resins can be used for cross-linking.
  • Advantageously used release agents are stearates, in particular zinc and calcium stearate, their mixtures or chemically related stearates in a proportion of 0.3 to 3.5 percent by weight based on the total mass of the molding composition.
  • Other fatty acid salts, fatty acid levels and fatty acid esters were also beneficial.
  • Accelerators were oxides of divalent cations, in particular the alkaline earth oxides MgO, CaO, SrO, BaO with a proportion of 0.1 to 0.5 percent by weight based on the total mass of the molding composition.
  • Glass fibers were used with fiber lengths according to the tables below.
  • the glass fibers are commercially available from conventional silicate glass, in particular E-glass in various fiber lengths of, for example, 3, 4.5, 6, 12 and 30 millimeters.
  • Short glass fibers are obtained by suitable comminution, for example by grinding the glass fibers under defined, reproducible grinding conditions and sieves.
  • molding compositions with the desired property profile by means of short glass fibers, for example 0.5 millimeter in fiber length.
  • short glass fibers for example 0.5 millimeter in fiber length.
  • polyacrylonitrile fibers or mixtures of glass fibers and polyacrylonitrile fibers The proportion of glass fibers in the total mass of the molding composition was 20 to 35 percent by weight and a mass ratio of short fibers: long fibers of 4: 1 to 1: 0.
  • Chalk, leaf silicates, mica, wollastonite and aluminum hydroxide were used as fillers. It is also conceivable to use aluminum oxide, rare earth oxides and their mixtures with 20 to 55 percent by weight of the total mass of the molding composition. A mixture of 13 weight percent chalk and 20 weight percent leaf silicate fulfilled the property profile very well. A mixture of 10 percent by weight of leaf silicate and 20 percent by weight of chalk still fulfilled the property profile well. Wood flour, cellulose, textile fibers, textile fabrics and veneer chips are also conceivable as fillers for special molding compounds.
  • the molding composition can also be colored by incorporating a coloring inorganic or organic substance as a pigment, color paste or solution.
  • the coloring substance is optionally added in amounts which are usually between 0.1 to 2.5 percent by weight, based on the sum of the components of the molding composition.
  • the plasticizing of the molding compounds takes place at 60 to 80 degrees Celsius. Pressing the pre-product granules into tablets or strands before further processing in automatic production plants is no problem. Final processing is possible by further processing the molding compound at 180 degrees Celsius.
  • the turbo mixing process is carried out in a cylindrical container of a fluid mixer, in particular a heating / cooling mixer from Henschel, for example of the type FM 10 in an open design, speed 560-3800 revolutions / minute stirring power, 3 kW, 2.5 kg batch.
  • a fluid mixer in particular a heating / cooling mixer from Henschel, for example of the type FM 10 in an open design, speed 560-3800 revolutions / minute stirring power, 3 kW, 2.5 kg batch.
  • the solid phenolic resin, the crosslinking agent, the release agent, the accelerator, the glass fibers and the fillers as well as possibly the dye are weighed out and placed in the mixer.
  • the mixing material introduced is mixed by the rotating, ring-shaped or wing-like tools of the mixer, thrown against the wall as a result of the centrifugal forces and pushed up. It leaves the influence of the rotors and returns to the bottom of the container under the influence of gravity in the middle of the container.
  • the temperature of the mix is kept at 100 degrees Celsius, which is achieved by cooling the container.
  • the power consumption of the stirrer is recorded to record the change in the viscous properties of the mix.
  • the resin is sintered within the mixing time, which is usually between 2 and 15 minutes. If the suitable first threshold value of the stirrer performance is reached due to changed viscous properties of the mix, up to 5% by weight of water is added in order to impregnate the fillers and fibers, to achieve homogeneous mixing of all components and to adjust the granule size.
  • a homogeneous molding composition is obtained as a homogeneous, fine-grained granulate.
  • the molding compound is discharged into the cooling mixer and cooled after reaching a second threshold value of the stirring power, coarse particles present are broken up by rotating knives.
  • the molding compound is cooled on a cooling belt.
  • These molding compounds are very free-flowing and almost dust-free. The absence of dust is determined by sieve analysis of the molding compound.
  • the average grain diameter of the granules was 1 to 5 millimeters, depending on the mixture.
  • a grain size of 0.7 millimeters or smaller is defined as dust, which may be screened out. 0 to 5 percent by weight, usually less than 3 percent by weight, of dust, based on the molding composition, is obtained.
  • the granulate can be stored or pre-plastified for automatic production and further processed, for example in the form of tablets, into the end product.
  • HMTA hexamethylenetetramine

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention concerne des matières de moulage sans amiante, à base de résines phénol-formol, connues également sous la dénomination de résines phénoliques, qui sont produites à l'aide d'un procédé de mélange à turbine, sous apport d'eau. Les matières de moulage comprennent jusqu'à 30 % en poids de résine novalaque, de fibres de verre courtes et de fibres de verre allongées, l'ensemble s'élevant approximativement à 30 % en poids. Les fibres de verre sont mélangées de préférence dans le rapport suivant: fibres courtes:fibres allongées = 2:1. Les charges minérales de la matière de moulage sont de préférence de la craie et des phyllosilicates, l'ensemble s'élevant approximativement à 30 % en poids. Ces matières de moulage comprennent en outre des agents de réticulation, des agents de démoulage, des accélérateurs et éventuellement des colorants dans des proportions de manière générale inférieures à 3 % en poids. Les matières de moulage sont obtenues sous forme de granulés à faible teneur en particules depoussière, qui peuvent être plastifiés et être soumis à d'autres traitements par fabrication automatisée. Les matières de moulage obtenues présentent des propriétés avantageuses dans la fabrication de collecteurs de moteurs électriques.
PCT/DE1994/000596 1993-06-16 1994-05-25 Preparation d'une matiere de moulage a base de novolaque pour collecteurs Ceased WO1994029381A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP94915506A EP0703944A1 (fr) 1993-06-16 1994-05-25 Preparation d'une matiere de moulage a base de novolaque pour collecteurs

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19934319907 DE4319907C2 (de) 1993-06-16 1993-06-16 Novolak-Formmasse und Verfahren zu deren Aufbereitung sowie deren Verwendung
DEP4319907.0 1993-06-16

Publications (1)

Publication Number Publication Date
WO1994029381A1 true WO1994029381A1 (fr) 1994-12-22

Family

ID=6490437

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1994/000596 Ceased WO1994029381A1 (fr) 1993-06-16 1994-05-25 Preparation d'une matiere de moulage a base de novolaque pour collecteurs

Country Status (3)

Country Link
EP (1) EP0703944A1 (fr)
DE (1) DE4319907C2 (fr)
WO (1) WO1994029381A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202009009417U1 (de) 2009-06-30 2009-12-03 Hüttenes-Albertus Chemische Werke GmbH Granulat
CN111363303A (zh) * 2020-04-23 2020-07-03 连云港英格达电子科技有限公司 高性能铜皮换向器专用玻璃纤维复合材料及其制备方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2410015A1 (fr) * 1977-11-25 1979-06-22 Huels Chemische Werke Ag Matiere a mouler thermodurcissable apte a l'ecoulement
EP0343433A2 (fr) * 1988-05-26 1989-11-29 TBA Industrial Products Limited Matières de moulage phénoliques
JPH03253243A (ja) * 1990-03-01 1991-11-12 Mitsuba Electric Mfg Co Ltd コンミテータおよびその成形方法
JPH05311036A (ja) * 1992-03-13 1993-11-22 Nok Corp フェノ−ル樹脂成形材料

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4233203A (en) * 1977-12-22 1980-11-11 Hooker Chemicals & Plastics Corp. Moldable thermosetting phenol-aldehyde resin compositions and process for making the compositions
JPS5867747A (ja) * 1981-10-16 1983-04-22 Shin Kobe Electric Mach Co Ltd フエノ−ル樹脂成形材料
JPS60168747A (ja) * 1984-02-10 1985-09-02 Matsushita Electric Works Ltd フエノ−ル樹脂成形材料及びその製造方法
JPH0292952A (ja) * 1988-09-29 1990-04-03 Unitika Ltd フエノール樹脂成形材料組成物
JPH06166742A (ja) * 1992-12-02 1994-06-14 Sumitomo Chem Co Ltd エポキシ樹脂組成物

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2410015A1 (fr) * 1977-11-25 1979-06-22 Huels Chemische Werke Ag Matiere a mouler thermodurcissable apte a l'ecoulement
EP0343433A2 (fr) * 1988-05-26 1989-11-29 TBA Industrial Products Limited Matières de moulage phénoliques
JPH03253243A (ja) * 1990-03-01 1991-11-12 Mitsuba Electric Mfg Co Ltd コンミテータおよびその成形方法
JPH05311036A (ja) * 1992-03-13 1993-11-22 Nok Corp フェノ−ル樹脂成形材料

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Derwent World Patents Index; AN 93-411012 *
PATENT ABSTRACTS OF JAPAN vol. 16, no. 52 (E - 1164)<5095> 10 February 1992 (1992-02-10) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202009009417U1 (de) 2009-06-30 2009-12-03 Hüttenes-Albertus Chemische Werke GmbH Granulat
DE102009027364A1 (de) 2009-06-30 2011-01-05 Hüttenes-Albertus Chemische Werke GmbH Granulat und Verfahren zur dessen Herstellung
EP2270084A1 (fr) 2009-06-30 2011-01-05 Hüttenes-Albertus Chemische-Werke GmbH Granulé et procédé destiné à sa fabrication
CN111363303A (zh) * 2020-04-23 2020-07-03 连云港英格达电子科技有限公司 高性能铜皮换向器专用玻璃纤维复合材料及其制备方法

Also Published As

Publication number Publication date
DE4319907A1 (de) 1994-12-22
DE4319907C2 (de) 1997-03-06
EP0703944A1 (fr) 1996-04-03

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