EP2704890A1 - Produit de nettoyage - Google Patents

Produit de nettoyage

Info

Publication number
EP2704890A1
EP2704890A1 EP11778820.8A EP11778820A EP2704890A1 EP 2704890 A1 EP2704890 A1 EP 2704890A1 EP 11778820 A EP11778820 A EP 11778820A EP 2704890 A1 EP2704890 A1 EP 2704890A1
Authority
EP
European Patent Office
Prior art keywords
styrene
cleaning agent
thermoplastic
cleaning
agent according
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.)
Withdrawn
Application number
EP11778820.8A
Other languages
German (de)
English (en)
Inventor
Sebastian Drossmann
Michael Münch
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.)
Muench Chemie International GmbH
Original Assignee
Muench Chemie International 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 Muench Chemie International GmbH filed Critical Muench Chemie International GmbH
Publication of EP2704890A1 publication Critical patent/EP2704890A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/70—Maintenance
    • B29C33/72—Cleaning
    • B29C33/722—Compositions for cleaning moulds
    • 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
    • B29B7/802—Constructions or methods for cleaning the mixing or kneading device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/27—Cleaning; Purging; Avoiding contamination
    • B29C48/2715—Cleaning; Purging; Avoiding contamination of plasticising units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/27—Cleaning; Purging; Avoiding contamination
    • B29C48/272—Cleaning; Purging; Avoiding contamination of dies
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
    • C11D2111/10—Objects to be cleaned
    • C11D2111/14—Hard surfaces
    • C11D2111/20—Industrial or commercial equipment, e.g. reactors, tubes or engines

Definitions

  • the invention relates to a cleaning agent for cleaning extruders and injection ussmaschinen, according to the preamble of patent claim 1 and a use of the cleaning agent according to the preamble of claim 13.
  • a sequence of materials takes place, for example, from a polar polymer to a nonpolar polymer.
  • amorphous polymers and subsequent partially crystalline polymers also present difficulties because they are not always miscible with one another.
  • Another problem with regard to a sequence of materials is when, starting from a dark coloration, color sequences are to be processed in the direction of a harsher coloration or in the direction of transparent material.
  • a cleaning mass for egg consisting of discrete, plastically deformable particles of a thermoplastic (A) with a
  • thermoplastic (A) Melting point above 200 ° C and a crystallinity of less than or equal to 50% and an amorphous or semi-crystalline thermoplastic (B) with a processing temperature ⁇ tion, which is below the melting point of the thermoplastic (A).
  • the thermoplastic (A) is in the cleaning mass with 1 wt -.%
  • thermoplastic (B) 95% by weight and the thermoplastic (B) with 5% by weight to 95% by weight.
  • the percentages by weight of (A) and (B) complement each other to 100% or less.
  • the discrete, plastically deformable particles of the thermoplastic (A) have a cleaning effect, while the amorphous or partially crystalline thermoplastic (B) acts as a liquid or flowable carrier for the plastically deformable particles of the thermoplastic (A) and / or removed impurities.
  • thermoplastic (A) must be ground very small so that it does not add the nozzle or the Schuka channel on the injection mold.
  • the use of the thermoplastic (A) as cylindrical or lenticular granules with a diameter of 1 mm to 6 mm and a length of 8 mm is rubbed. In practice, however, such unmelted granules adversely obstruct the nozzle head and / or the closing nozzle of an extruder or an injection molding machine, which is also described as a comparative example.
  • the laid-open specification WO 95/17268 describes an abrasive and cleaning mixture of: (a) a predominant amount of an abrasive powder and (b) at least one resin selected from the group consisting of a polymer of a diene, a resinous material, ei n coumarone-indene resin, and a mixture of two or more of these substances, and (c) at least one copolymer of an olefin and an acrylate or a methyl acrylate.
  • the disadvantage of this process is that the polymers mentioned in (b) and (c) are not miscible with all polymers to be subsequently processed.
  • the individual polymers are mixed with the abrasive mixtures of the examples described there, so that they can subsequently be further worked in the same polymer base.
  • the machines are cleaned by the cleaning mixture of foreign contaminants such as paint residues and burns, but traces of the cleaning mixture remain in the machine which contaminate the polymers to be processed. This leads to disadvantageous Schlieren- and / or Lami nat Struktur.
  • DE 103 34 293 A1 discloses a cleaning composition for plastics processing machines and a method and an application for the cleaning composition comprising: 1% to 18% by weight water, 10% to 50% by weight % of a mixture consisting of 1% by weight to
  • the laid-open specification DE 42 02 618 A1 discloses a cleaning composition for a resin molding apparatus which comprises 50% by weight to
  • a polyolefin resin having a melt index of 0.01 to 0.5, further 0, 1 wt .-% to 15 wt .-% of an acrylic copolymer, 2 wt .-% to 30 wt .-% of a Neutral salt of organic sulfonic acid and 0, 1 wt.% To 10 wt.% Of basic magnesium carbonate, magnesium hydroxide, potassium carbonate, zinc carbonate or a mixture of two or more components thereof.
  • DE 195 54 863 A1 discloses a method for producing different colored pellets and a device for carrying out the method. This procedure works with two separate granulators for different Farbpeilets, as well as a complicated discharge opening at the extruder head. A significant disadvantage of the procedure described there is the high mechanical complexity, which must be operated to change the color of a polymer. This effort is associated with high investment costs.
  • EP 2 105 277 A1 describes a cleaning agent which comprises mineral particles, crystalline free acid and organic polymer, the mineral particles and / or the crystalline free acid having at least partially an encapsulation.
  • the cleaning agent disclosed therein has the disadvantage that the crystalline free acid contained therein under cleaning conditions in an extruder or an injection molding machine, ie at elevated temperature, asmaschinem ittel acts, gas, namely primarily carbon dioxide is released.
  • a release of this gas takes place in the cleaning mixture, however, not homogeneous, but preferably on warm or hot parts of the extruder or the injection molding machine, so that in particular gas bubbles form on these parts of the extruder or the injection ussmaschine, the egg nen contact the local detergent with to obstruct the surface to be cleaned of the extruder or the injection molding machine, resulting in either insufficient and poor cleaning or significantly longer required cleaning times, for example, due to style lstands diligence that are necessary for the propellant can develop its full effect.
  • a blowing agent-containing cleaning agent also entails the risk of uncontrollable gas leaks from the nozzle of the extruder head due to uncontrollable gas formation in the extruder or the injection molding machine.
  • Such an uncontrolled gas outlet can also take place on all valves of the extruder or the injection molding machine, which open venting are possible on the hot runner and the machine on the one hand, but a uch the operating personnel on the other endanger.
  • a further disadvantage is also that parts of the polymer to be cleaned and / or, in particular, also parts of the cleaning agent are entrained by these uncontrolled gas leaks. These particulate particles can deposit in valves and nozzles and present an inherent danger of clogging, creating additional hazards, especially to the operating personnel.
  • a further disadvantage of the above-mentioned cleaning agents is that the polymers and additives used there, such as citric acid, tend to decompose at elevated temperatures, which leads to decomposition products which, on the one hand, are unpleasant odor and, moreover, are also harmful to health. Unless, for example, in the
  • the citric acid is further provided with a wax coating, for example from egg nem polyethylene, in addition to the decomposition of citric acid also the risk of fog or
  • the object of the present invention is therefore to provide a dust-free, inexpensive and easy to produce detergent for the cleaning of extruders and injection molding machines and its use, with which the above-mentioned disadvantages and limitations are avoided.
  • the advantage over the prior art should be that the extruders and injection molding machines without mechanical effort, such as worm pulling, Sandstrahiung, loops, and in a short period of time to rei nigen.
  • a detergent-free cleaning agent for cleaning extruders and injection molding machines which has the following components:
  • a compression of all components in a single-screw or twin-screw extruder, taking place by means of heat or heat is effected in the case of temperatures in the range of 50 ° C to 200 ° C above room temperature, d, h. in the range of 75 ° C to 225 ° C, understood.
  • a cleaning agent consisting of a mixture of minerals with at least one inorganic base and plastics and / or synthetic rubbers brings about a high cleaning performance in extruders and injection molding machines without leaving detergent residues in the extruder or in the injection molding machine in the course of the cleaning.
  • the term "propellant” understood the foam as an adjuvant for on ⁇ and swelling of polymer compositions and the detergent can be used.
  • these include, for example, i quo carboxylic reindeer, Azodicarboxamide or toluenesulfonic acid, as well as Anorga ⁇ African aids bicarbonates. All these substances have in common that they tend when heated to ei ner significant formation of gas, in particular carbon dioxide, water vapor, ammonia and nitrogen are formed, through which foamed cleaning middle! and / or bloated ,
  • the term "propellant-free" according to the invention is to be understood as meaning that the cleaning agent according to the invention contains no substances containing significant gas formation or decomposition when heated to a range of 300 ° C to 350 ° C.
  • a significant advantage of the propellant-free cleaning agent according to the invention over conventional cleaning agents known from the state of the art is that the cleaning agent according to the invention can be used at considerably higher temperatures than previously customary cleaning agents, namely up to approx. 300 ° C to 350 ° C, so that the cleaning agent according to the invention is suitable for cleaning a considerably broader spectrum of plastics, such.
  • polyamide 6.6 (PA6.6) which can be eliminated, for example, only at temperatures in the range of 290 ° C effectively from an extruder or an injection molding machine with the madesm ittel invention.
  • Another important advantage of the cleaning agent according to the invention is also that no mist or.
  • the cleaning agent according to the invention does not have blowing agents or coatings for the same, which at elevated temperatures tend to decompose and form gas as well as to form smoke and mist.
  • the use of the propellant-free cleaning agent according to the invention significantly improved reliability, both with regard to hazardous substances, as well as with regard to possible clogging of nozzles or valves of the extruder or the injection molding can be ensured as erfi tion according M rupture of starsstoffsubsta nz or substance to be cleaned is not to be feared due to the foaming and / or expanding substances which are not necessary according to the invention,
  • components A), B) and C) are used in the form of powder mixtures and / or granules and / or compounds and / or mixtures thereof. This advantageously makes it possible to use commercially available products without the need to carry out the preparation of these components, which contributes to the cost-effective manufac turing of the blowing agent-free cleaning agent according to the invention.
  • thermoplastic elastomers according to the invention has a particularly advantageous effect, since they practically do not adhere to surfaces, but easily detach from such surfaces, whereby the polymer to be removed adheres to the propellant-free detergent according to the invention and with this from the Surface of the extruder or the injection molding machine is removed.
  • the minerals A) according to one embodiment of the cleaning agent are selected from the group of artificial and / or natural minerals consisting of talc, chalk, barium sulfate, silicates, silicic acid, glass fibers, glass ball n, aluminum oxides, magnesium hydroxide, aluminum hydroxide, aluminum nitrides, lithium minerals, nanodiamonds , Nanoparticles such as Silicates such as kaolin, wollastonite, bentonite and / or mixtures thereof.
  • the minerals A) according to one embodiment of the cleaning agent are in a particle size of 5 p m - 250 ⁇ , preferably from 15 ⁇ - 220 ⁇ , more preferably from 20 pm - 75 ⁇ ago.
  • the use of such particle sizes ensures an excellent abrasive removal of polymer to be cleaned due to an optimized entrainment capability of the polymer to be purified by the minerals A), the inventive cleaning agent simultaneously having excellent flowability and good in undercuts and hard to reach areas the extruder or the injection molding machine can penetrate,
  • the Anorga African bases B) according to one embodiment of the invention Rei n concernssmittels are inventively selected from the group of inorganic bases, such as sodium carbonate, potassium carbonate and / or mixtures thereof,
  • the plastics and / or synthetic rubbers C) according to one embodiment of the cleaning agent are selected according to the invention from the group of synthetically produced rubbers, the thermoplastic styrenic olefin block copolymers, styrene-ethylene-ethylene-propylene-styrene block copolymers (SEEPS), styrene-ethylene Butadiene-styrene block copolymers (SEBS), styrene-butadiene-styrene block polymers (SBS), styrene-isoprene-styrene block polymers (SIS), styrene-ethylene-butylene-styrene block polymers (SEBS), styrene-ethylene-propylene Sytrol block polymers (SEPS), thermoplastic elastomers (TPE), thermoplastic olefins (TPO), thermoplastic styrenes (TPS), ethylene-propylene-diene rubbers (
  • the plastics and / or Syntheseka utschuke C) according to another embodiment of the cleaning agent have a molecular weight of 70, 000 to 300,000 g / mol, advantageously a measured at room temperature Shore A hardness of 35 to 90 (measured according to ISO 868) and as needed 5% to 45% softener oil on.
  • Such synthetic rubbers thus constitute a soft, but not liquid polymer which imparts excellent fluidity to the cleaning agent according to the invention, the cleaning agent having a viscosity which is low enough for the cleaning agent according to the invention to be well in undercuts and hard to reach areas of the extruder or the Spritzgiess- or injection molding machine can flow.
  • silicone rubbers (VMQ) and / or natural rubber (NR) may be used as well as in or in admixture, in particular in admixture with the abovementioned substances.
  • the granulate at room temperature has a Shore A hardness, measured in accordance with ISO 868, of 4 to 95, preferably 20 to 93 and particularly preferably 40 to 90.
  • the cleaning granules having the abovementioned Shore hardness are very advantageously adapted to the respective plastic to be cleaned, respectively, the polymer to be purified, wherein the inventive detergent so on the
  • the polymer to be purified is determined that a entrainment and abrasion effect of the cleaning agent is optimized for the particular polymer to be cleaned, so that a cleaning of the extruder or the injection molding machine can take place in a very effective manner with a high cycle rate, wherein the cleaning agent according to the invention
  • it is stable up to temperatures of up to 350 ° C., and the cleaning effect can also be optimized by the choice of the temperature and the viscosity associated with the temperature.
  • the cleaning agent according to the invention does not contain blowing agents which tend to decompose and form gas at elevated temperatures, the cleaning agent according to the invention can be heated up to temperatures of 300 ° C. to 350 ° C. without problems, thereby ensuring that virtually all plastics from extruders and Injection molding machines removed and the latter can be cleaned.
  • cleaning agents according to the invention has in a load of 10 kg and a temperature of 230 ° C a melt volume-flow rate (MVR), measured according to DIN ISO 1133, of 30 cm 3/10 min ⁇ 30%, preferably ⁇ 20% and most preferably ⁇ 10%.
  • MVR melt volume-flow rate
  • the object of the invention is achieved by the use of a cleaning agent for cleaning extruders and injection molding or injection molding machines according to ß above.
  • the inventive design of the novel cleaning agent is a complete filling of the screw channel and / or hot runner, so that the active ingredient components can penetrate into undercuts, such as in a nozzle head. This results in an important economic advantage by saving on cleaning agents.
  • the invention will be described in more detail below with reference to non-limiting exemplary embodiments.
  • the ZSK 28 extruder was rinsed with the above cleaning mixture at a rate of 4 Kg / hr at 195 ° C.
  • the cleaning mixture required for this was 950 grams.
  • the subsequently to be processed polyamide 66 nature showed no impurities.
  • the extruder ZSK 28 was rinsed with the above cleaning mixture at a rate of 4 Kg / hr at 250 ° C.
  • the cleaning mixture required for this was 753 grams.
  • the polypropylene (PP) natural to be subsequently processed showed no impurities.
  • Table I shows the results of Examples 3 to 6. These were mixed analogously to Examples I and 2 in the Henschel mixer, compounded and tested on the ZSK 28 by Coperion Werner & Pleiderer and on the injection molding machine from Ahrburg. Both machines were previously contaminated with a masterbatch containing 50% carbon black on LDPE.
  • thermoplastic polyetherester-eggastomer thermoplastic polyetherester-eggastomer
  • PC * polycarbonate plastic
  • PA / PP * polyamide / polypropylene plastic
  • PA6.6 * polyamide 6.6-carbon
  • the cleaning agent for cleaning extruders and injection molding machines according to the invention is superior to conventional cleaners according to the prior art and leads to very good cleaning results.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Detergent Compositions (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

L'invention concerne un produit de nettoyage exempt d'agent propulseur, destiné au nettoyage d'extrudeuses et de machines de moulage par injection, qui comprend les composants suivants : A) au moins un minéral artificiel et/ou naturel; B) au moins une base inorganique et C) au moins une matière plastique et/ou un caoutchouc synthétique, les composants A), B) et C) étant d'abord intégralement mélangés, puis transformés, au cours d'une étape subséquente, en granulés homogènes par compression avec application simultanée de chaleur, en particulier par compoundage. L'invention concerne en outre une utilisation d'un tel produit de nettoyage pour le nettoyage d'extrudeuses et de machines de moulage par injection.
EP11778820.8A 2011-05-06 2011-10-17 Produit de nettoyage Withdrawn EP2704890A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011050178 2011-05-06
PCT/EP2011/068063 WO2012152342A1 (fr) 2011-05-06 2011-10-17 Produit de nettoyage

Publications (1)

Publication Number Publication Date
EP2704890A1 true EP2704890A1 (fr) 2014-03-12

Family

ID=44906041

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11778820.8A Withdrawn EP2704890A1 (fr) 2011-05-06 2011-10-17 Produit de nettoyage

Country Status (2)

Country Link
EP (1) EP2704890A1 (fr)
WO (1) WO2012152342A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3284567B1 (fr) * 2016-08-17 2020-02-26 Coperion GmbH Dispositif et procédé de fabrication d'une matière plastique fondue non colorée et colorée
EP3960413A1 (fr) * 2020-09-01 2022-03-02 Mesut Fidan Composition de nettoyage pour extrudeuse et machines de moulage par injection

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4954545A (en) * 1987-07-27 1990-09-04 Phillips Petroleum Company Process for cleaning polymer processing equipment
JPH04246443A (ja) 1991-01-31 1992-09-02 Chisso Corp 洗浄用組成物
US5395456A (en) * 1993-05-06 1995-03-07 Ferro Corporation Abrasive and purge compositions and methods of using the same
US5443768A (en) 1993-12-21 1995-08-22 The Ferro Corporation Abrasive and purge compositions
JP3061580B2 (ja) 1996-12-10 2000-07-10 株式会社日本製鋼所 色違いペレットの製造方法および製造装置
DE19858672A1 (de) 1998-12-18 2000-06-21 Basf Ag Reinigungsmasse für Extruder
US20030221707A1 (en) * 2002-05-28 2003-12-04 Eastman Kodak Company Layered inorganic particles as extruder purge materials
DE10334293A1 (de) 2003-07-25 2005-03-03 Lieberum, Evelyne Reinigungszusammensetzung für kunstoffverarbeitende Maschinen, Verfahren und Anwendung
PL2105277T3 (pl) 2008-03-25 2013-05-31 Granula Polymer Gmbh Środek czyszczący do urządzeń do wytwarzania tworzyw sztucznych lub przetwórstwa tworzyw sztucznych, jego zastosowanie, sposób wytwarzania jak i sposób czyszczenia
DE102008061171A1 (de) * 2008-12-09 2010-06-10 Münch Chemie International GmbH Reinigungsmittel

Also Published As

Publication number Publication date
WO2012152342A1 (fr) 2012-11-15

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