EP2142352A1 - Pièces moulées en plastique et leur production - Google Patents

Pièces moulées en plastique et leur production

Info

Publication number
EP2142352A1
EP2142352A1 EP08735043A EP08735043A EP2142352A1 EP 2142352 A1 EP2142352 A1 EP 2142352A1 EP 08735043 A EP08735043 A EP 08735043A EP 08735043 A EP08735043 A EP 08735043A EP 2142352 A1 EP2142352 A1 EP 2142352A1
Authority
EP
European Patent Office
Prior art keywords
reaction mass
inorganic filler
filler
molding
plastic
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Withdrawn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
EP08735043A
Other languages
German (de)
English (en)
Inventor
Martin Kirschbaum
Evangelos Konstantinidis
Stefanie Brenner
Mathias PÄHL
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.)
SCHEER SURFACE SOLUTIONS GmbH
Original Assignee
SCHEER SURFACE SOLUTIONS 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 SCHEER SURFACE SOLUTIONS GmbH filed Critical SCHEER SURFACE SOLUTIONS GmbH
Publication of EP2142352A1 publication Critical patent/EP2142352A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
    • C08F265/04—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of esters
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02—Macromolecular compounds
    • C04B26/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B26/06—Acrylates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
    • C08F265/04—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of esters
    • C08F265/06—Polymerisation of acrylate or methacrylate esters on to polymers thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L51/003—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • 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
    • B29K2033/00—Use of polymers of unsaturated acids or derivatives thereof as moulding material
    • B29K2033/04—Polymers of esters
    • B29K2033/12—Polymers of methacrylic acid esters, e.g. PMMA, i.e. polymethylmethacrylate
    • 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
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/007—Hardness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/769—Sanitary equipment
    • B29L2031/7692—Baths
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/0045—Polymers chosen for their physico-chemical characteristics
    • C04B2103/0065—Polymers characterised by their glass transition temperature (Tg)
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L33/04—Homopolymers or copolymers of esters
    • C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
    • C08L33/08—Homopolymers or copolymers of acrylic acid esters

Definitions

  • the invention relates to a process for the production of plastic moldings, in particular for the kitchen, sanitary and trade fair area, a reaction mass for the production of plastic moldings as well as plastic moldings produced or producible by this process and / or from this reaction mass.
  • Plate-shaped plastic moldings can be used, for example, in interior design, especially in the kitchen or in the sanitary sector, as well as in the construction of buildings, in shopfitting and exhibition construction.
  • the molded parts are used there in particular as floor, wall or worktop.
  • the molded parts differ in their shape, in their dimensions and in their composition.
  • the abovementioned molded parts generally have an organic polymer matrix in which inorganic and / or organic fillers are dispersed.
  • the polymer matrix can be formed, for example, from polyester or polyacrylic resins.
  • the inorganic fillers are generally used as flour, sand or powder, in particular quartz and cristobalite can be used.
  • the known from the prior art plate-shaped plastic moldings are usually cast from a reaction mass and then cured.
  • the reaction mass can be poured into temperature-regulated printing plates and cured under temperature increase and pressure.
  • EP 851 808 it is thus also possible to produce molded parts in the form of composites.
  • an integral plate-shaped component is described, which has a multilayer structure.
  • the plastic moldings known from the prior art may, in order to be better cared for and scratch-resistant, contain platelet-shaped materials in a desired preferred orientation.
  • DE 40 40 602 discloses a reaction mass which, in addition to a particulate filler having a particle size distribution of 0 to 200 ⁇ m, contains a platelet-shaped iriodin dye having a particle size of 30 ⁇ m to 200 ⁇ m, with which such molded parts can be produced.
  • the known from the prior art method for producing the mentioned plate-shaped plastic moldings hardly differ from each other.
  • the plastic moldings can be sanded and polished after casting and curing, then they are usually cut to size. In this form, they are usually used without further processing or installed at customers. Any necessary adjustment must be made mechanically, for example by cutting or pledging.
  • the cut plate-shaped plastic parts are then installed according to their purpose, for example as a kitchen worktop.
  • connection of plastic parts to walls or furniture is usually done via special connection profiles. However, this can create small gaps and cracks between the plastic moldings and the profiles, in which, for example, dirt and bacteria can be stored and therefore must be laboriously sealed.
  • plastic moldings that can be easily and individually adapted to their destination and preferably also offer the possibility of a gap-free connection.
  • the plastic moldings themselves should have a high filler content, the filler should be distributed as evenly as possible in the plastic moldings.
  • the inventive method is suitable for the production of plastic molded parts, in particular for the production of substantially plate-shaped plastic moldings.
  • An inventive method is particularly suitable for the production of countertops, wall panels and floor panels, which are used in the kitchen, sanitary and trade fair area.
  • a preferably plate-shaped molded part is produced from a castable reaction mass and cured. After curing, the molded part is formed.
  • the castable reaction mass has at least one organic polymer component and at least one inorganic filler, preferably a particulate inorganic filler.
  • the at least one filler has an average particle size of less than 150 ⁇ m, preferably less than 100 ⁇ m, in particular less than 50 ⁇ m, particularly preferably less than 30 ⁇ m. In the last-mentioned range, particle sizes between 5 ⁇ m and 10 ⁇ m are particularly preferred.
  • In the reaction mass of the inorganic filler is contained in a proportion of> 50% by weight (based on the mass of the cured molding).
  • the reaction mass is converted to produce the preferably plate-shaped molded part in a mold, in particular cast, and then cured.
  • the reaction mass can be converted into a heatable mold.
  • the reaction mass can be heated prior to transfer to the mold, for example to a temperature of about 50 ° C. After filling the mold, it can be heated relatively quickly to a specific curing temperature, for example about 100 ° C. According to the invention, it may be provided that the curing of the reaction mass is assisted by an increased pressure of the mold.
  • the cured molded part is heated to at least a portion, in particular to temperatures above the Tg of the at least one organic polymer component, preferably to at least 100 0 C.
  • the plastic molded part is moldable and can undergo a change in shape, in particular a plastic deformation become. After the respective molding has cooled, it retains its new shape.
  • this process is reversible.
  • the forming is carried out at a temperature which is below the temperature at which the molded part could melt or decompose.
  • the cured molding for forming to a temperature between 100 0 C and 250 0 C, preferably between 100 0 C and 200 0 C, in particular between 120 0 C and 160 ° C, heated.
  • the plastic moldings produced from the above-mentioned reaction mass also after their curing are still easily deformable, in particular very well suited for thermal forming, despite the relatively high proportion of filler. This seems to be due to the materials used and their interaction. It is believed that the small mean particle size of the inorganic fillers in particular plays a major role here. This seems to ensure a relatively uniform temperature distribution in the interior of the molded part when heated. The risk of the occurrence of large stresses in the molded part is greatly minimized.
  • the surface of the molded part remains essentially free of cracks during forming, as a rule no cracks are visible with the naked eye. After reshaping, therefore, the surface must at most be sanded off briefly, in most cases the reshaped plastic part can be used directly without further processing.
  • the reaction mass used in a process according to the invention is particularly preferably free of inorganic filler particles having a particle size> 250 ⁇ m.
  • it has exclusively inorganic filler particles with a particle size ⁇ 100 .mu.m, in particular ⁇ 50 .mu.m (optionally traces of coarser particles can not be avoided due to the production, but the proportion of these is always less than 5%, preferably less than 1%, in each case on the total amount of filler particles).
  • the reaction mass has filler particles in a unimodal distribution, but bimodal or trimodal distributions may also be preferred.
  • the reaction mass used in addition to the inorganic filler particles no further fillers such as the organic fillers mentioned above.
  • the reaction mass consists essentially of the at least one organic polymer component and the at least one inorganic filler and has next to at most one or more colorants and / or auxiliaries.
  • the latter include, in particular, crosslinkers, release agents, polymerization catalysts (for example peroxides), rheological aids and dispersants, which may be present in small amounts.
  • the auxiliaries serve in particular to improve the chemical and / or mechanical properties of the reaction mass and can be added to the needs of the respective applications.
  • the reaction mixture according to the invention has, as rheology assistant, a silanized or non-silanized silica.
  • the rheology aid effectively slows or even completely prevents sedimentation of the at least one inorganic filler in the reaction mass prior to curing.
  • the reaction mass of the invention preferably has a viscosity in the range between 5 Pa s and 60 Pa s, preferably between 15 Pa s and 45 Pa s, in particular between 20 Pa s and 30 Pa s, (in each case at 20 0 C). This is essentially determined by the proportion of filler in the reaction mass, but can also be influenced by the auxiliaries mentioned.
  • the cured molding is heated by means of hot air for forming.
  • the method can be carried out so that air is heated by one or more hot air devices, which is specifically directed to the molding to this at one or more certain places and to carry out a localized transformation there.
  • the molded part can be heated by means of any known fluid, including by means of liquids, as long as their use leaves the plastic molded part undamaged.
  • the molded part is heated by radiation, for example by radiation in the infrared and / or in the microwave range.
  • the cured molding is heated for forming in a heated press.
  • plastic moldings produced from the castable reaction mass can be produced according to the method according to the invention plate-shaped plastic moldings, which are adapted by forming individually to their destination.
  • edge of a plastic molding intended as a kitchen worktop can be shaped upwards along a wall, optionally still on site. A gap in the plane of the work surface does not occur accordingly.
  • connection profile for sealing the wall transition can be waived if necessary.
  • shower trays are also particularly easy to produce according to the method according to the invention.
  • the one-piece plastic moldings are trough-shaped or basin-shaped.
  • a plate can be cast, which is then subjected to a deep-drawing process, wherein it is thermally deformed and the depression or the depressions are formed.
  • individually shaped plastic molded parts can be produced which can be installed directly.
  • the castable reaction mass comprises an organic polymer component based on acrylic and / or methacrylic, in particular a synthetic resin based on this.
  • the organic polymer component may comprise suitable monomers and optionally prepolymers.
  • other monomers in the form of alkyl or aryl methacrylates can be used to form copolymers.
  • copolymers with ethyl methacrylate or butyl methacrylate can be formed.
  • the castable reaction mass comprises polymethylmethacrylate (PMMA) as the organic polymer component.
  • PMMA polymethylmethacrylate
  • polystyrene resin In addition to PMMA, further organic polymers selected from a wide range of different plastics can be used to form the polymer matrix. Examples which may be mentioned are polyester, polyacrylate and polyvinyl ester resins, but also polyurethane or epoxy resins. In principle, it does not play a decisive role for the process according to the invention which type of reaction, ie whether or not For example, radical, anionic or cationic polymerization, takes place in the formation of the polymers.
  • type of reaction ie whether or not For example, radical, anionic or cationic polymerization, takes place in the formation of the polymers.
  • the castable reaction mass contains methyl methacrylate (MMA) as the organic polymer component.
  • MMA methyl methacrylate
  • the castability of the reaction mass can be determined by the ratio of reactants to one another, for example by the ratio of PMMA to MMA, if both are contained in the reaction mass.
  • a proportion of PMMA dissolved in MMA counteracts sedimentation of the filler particles during handling of the reaction mass.
  • other known substances can be used for this purpose, e.g. fumed silica, which has already been mentioned.
  • crosslinkers may be added to the castable reaction mass. Suitable crosslinkers are known to the person skilled in the art. Preference is given to using crosslinkers as polyfunctional or polyfunctional monomers and / or polymers, in particular polyfunctional or polyfunctional acrylates or dimethacrylates, for example ethylene glycol dimethacrylate, trimethylolpropane trimethacrylate or pentaerythritol triacrylate.
  • Stabilizers serve to improve the chemical properties of the organic polymer component. They increase the lifetime of the polymers and protect them from harmful influences such as oxidation, radiation heat and heat, which can occur in the application area.
  • antioxidants and / or UV stabilizers prevents oxidation and decomposition and / or re-crosslinking of polymer chains.
  • phenols, amines or phosphenes can be used.
  • Coloring agents in the present case are both dyes, especially organic dyes, as well as pigments.
  • pigments are added to the castable reaction mass as colorants, since with organic dyes there is a risk that they change during or after production of the moldings and lose their color fastness. Therefore, especially inorganic pigments are of particular importance.
  • T FarbO 2 iron oxide, carbon black, cobalt or ultramarine blue, as well as chromium oxide green may therefore be suitable in particular as colorants.
  • effect pigments may also be provided, for example, rare-earth-doped strontium aluminates show intensive night lighting.
  • the colorants can be distributed uniformly or unevenly in the plastic molding.
  • External and / or internal plasticizers may also be included to reduce the brittleness, hardness and softening temperature of the polymers in the reaction mass and thus improve the described formability.
  • suitable plasticizers such as e.g. Phthalic acid esters (an external plasticizer) or long chain acrylates (an internal plasticizer) are known to those skilled in the art.
  • Release agents can be added to the reaction mass for improved release of the cured molding from the mold.
  • Suitable release agents such as e.g. Stearic acid are known in the art.
  • the at least one inorganic filler mentioned above is preferably a finely divided inorganic filler.
  • the at least one inorganic filler is selected from the group consisting of quartz, cristobalite, tridymite, corundum and mixtures thereof. Quartz and cristobalite are particularly preferred.
  • the at least one inorganic filler may also include materials such as glass, alumina, granite flour, basalt flour, ceramics, particularly silicon nitride and / or silicon carbide.
  • the at least one inorganic filler usable according to the invention comprises surface-coated filler particles.
  • the surfaces of the filler particles can be silanized in order to ensure a particularly good bond to the at least one organic polymer component.
  • the at least one inorganic filler has a Mohs hardness greater than or equal to 4, in particular between 5 and 9, on.
  • the at least one inorganic filler is present in a proportion of 50% by weight to 85% by weight, in particular in a proportion of about 60% by weight to 70% by weight, based on the mass of the cured molding, contained in the reaction mass.
  • the highest possible filler content is sought.
  • Reaction compositions have proven to be particularly suitable for use in a process according to the invention, which are used as constituents at least one organic polymer component and at least one inorganic filler, the latter having an average particle size ⁇ 30 .mu.m, in particular ⁇ 20 .mu.m, more preferably between 5 .mu.m and 10 .mu.m, wherein the inorganic filler in the reaction mass in a proportion of> 50 wt .-% is included. Accordingly, such a reaction mass for the production of plastic moldings is the subject of the present invention.
  • the at least one filler in particular has a d90 value of 50 ⁇ m or less, in particular of 30 ⁇ m or less, particularly preferably of 25 ⁇ m or less.
  • the d95 value of the at least one filler in a reaction mixture according to the invention is preferably 60 ⁇ m or less, in particular 45 ⁇ m or less, particularly preferably 35 ⁇ m or less.
  • a reaction mixture according to the invention preferably has no further fillers.
  • reaction mass With regard to the other properties of the reaction mass, reference may be made to the statements already made above, e.g. with regard to optional colorants and auxiliaries, the nature of the at least one organic polymer component, the composition of the reaction mass and the physical nature of the at least one inorganic filler.
  • the present invention also includes a plastic molding, in particular a substantially plate-shaped Plastic molding, which is produced or preparable according to the inventive method.
  • a plastic molding in particular a substantially plate-shaped Plastic molding, which is produced or preparable according to the inventive method.
  • this is a worktop, a wall plate or a bottom plate, in particular for the kitchen, sanitary and trade fair area.
  • the plastic molding according to the invention may also be trough-shaped or basin-shaped, as already mentioned.
  • An inventive substantially plate-shaped plastic molded part can be applied to a known from the prior art substructure (for example, plywood, foamed glass, polyurethane foam or with a honeycomb structure) and then forms, for example, the surface of a kitchen worktop.
  • a known from the prior art substructure for example, plywood, foamed glass, polyurethane foam or with a honeycomb structure
  • the plastic molding according to the invention has a matrix which can be prepared from the above-defined at least one organic polymer component and into which the above-defined at least one inorganic filler, preferably evenly distributed, is embedded.
  • the plastic molding according to the invention preferably has a Mohs hardness of not more than 9, in particular between 4 and 7, preferably between 5 and 7, on.
  • the plastic molded part according to the invention has a preferably uniform thickness of between 2 mm and 15 mm, in particular between 4 mm and 8 mm. Particularly preferred is a thickness of about 6 mm.
  • a substantially plate-shaped plastic molded part according to the invention can in principle be produced in any dimensions, but preferably it has a maximum length of up to about 4.1 m and a maximum width of up to about 1.3 m.
  • the plastic molding according to the invention particularly preferably has at least one inorganic filler which has an average particle size ⁇ 30 ⁇ m, in particular ⁇ 20 ⁇ m, particularly preferably between 5 ⁇ m and 10 ⁇ m.
  • it preferably has no further fillers.
  • it is substantially free of inorganic filler particles having a particle size> 250 microns.
  • it has exclusively inorganic filler particles with a particle size ⁇ 100 .mu.m, in particular ⁇ 50 .mu.m.
  • the at least one inorganic filler is contained in the plastic molding in a proportion of> 50 wt .-% (based on the total mass of the plastic molding).
  • the proportion of the at least one inorganic filler is between 50 wt .-% and 85 wt .-%, in particular between 60 wt .-% and 70 wt .-%.
  • an organic polymer component methyl methacrylate / polymethyl methacrylate with about 25% polymer content
  • a conventional crosslinking agent trimethylolpropane trimethacrylate
  • a customary peroxidic catalyst (1: 2 mixture of di (4-tert-butylcyclohexyl) peroxydicarbonate and dilauroperoxide)
  • quartz powder as inorganic filler Silica 3000MST, silanized grade
  • a thixotropic agent hydrophobic silica
  • a customary peroxidic catalyst (1: 2 mixture of di (4-tert-butylcyclohexyl) peroxydicarbonate and dilauroperoxide)
  • quartz powder as inorganic filler Silica 3000MST, silanized grade
  • a thixotropic agent hydrophobic silica
  • a conventional crosslinking agent trimethylolpropane trimethacrylate
  • a customary peroxidic catalyst 1: 2 mixture of di (4-tert-butylcyclohexyl) peroxydicarbonate and dilauroperoxide
  • quartz powder as inorganic filler Silica 3000MST, silanized grade
  • a customary peroxidic catalyst (1: 2 mixture of di (4-tert-butylcyclohexyl) peroxydicarbonate and dilauroperoxide)
  • a conventional crosslinking agent trimethylolpropane trimethacrylate
  • a conventional peroxidic catalyst 1: 2 mixture of di- (4-tert-butylcyclohexyl) peroxydicarbonate and dilauro peroxide
  • corundum flour silane-modified sepase type
  • a thixotropic agent hydrophobic silica
  • Reaction masses according to formulations 1 to 5 are all very easy to process. Deposition of the filler during processing was not observed.
  • the measured viscosities of the casting masses were:
  • Formulation 2 39600 mPa-s at 20 0 C (high tixotrophic mass)
  • the reaction masses were filled for the production of plate-shaped moldings in a heated to about 30 ° C mold.
  • the mold was then heated to a temperature of about 100 0 C. At this temperature, the molded parts were allowed to cure under pressure.
  • the edge of the moldings was heated locally to about 150 0 C and then bent by pressure forming. After cooling again, plates were obtained with a longitudinal edge projecting at a 90 "angle.
  • the forming was smooth and without damaging the plate-shaped moldings.
  • the surface of the moldings showed no visible cracks in the bent area and did not have to be reworked.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

L'invention concerne un procédé pour produire des pièces moulées en plastique, conçues de préférence pour les installations de cuisine, les installations sanitaires, et les installations de foires-expositions. Ce procédé consiste : à produire une pièce moulée de préférence en forme de plaque à partir d'une masse de réaction coulable, et à façonner cette pièce après le processus de cuisson. Selon l'invention, parmi les ingrédients de la masse de réaction figurent au moins un constituant polymère organique et au moins une matière de charge anorganique. En outre, cette matière de charge présente une granulométrie moyenne < 150 μm, et la masse de réaction comporte une proportion > 50 % en poids de matière de charge anorganique par rapport à la masse de la pièce moulée après cuisson. Cette invention concerne en outre une masse de réaction pouvant être utilisée dans ledit procédé, ainsi que des pièces moulées en plastique qui sont ou qui peuvent être produites au moyen de ce procédé et/ou à partir de cette masse de réaction.
EP08735043A 2007-04-05 2008-04-05 Pièces moulées en plastique et leur production Withdrawn EP2142352A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007017978A DE102007017978A1 (de) 2007-04-05 2007-04-05 Kunststoffformteile und ihre Herstellung
PCT/EP2008/002722 WO2008122428A1 (fr) 2007-04-05 2008-04-05 Pièces moulées en plastique et leur production

Publications (1)

Publication Number Publication Date
EP2142352A1 true EP2142352A1 (fr) 2010-01-13

Family

ID=39575565

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08735043A Withdrawn EP2142352A1 (fr) 2007-04-05 2008-04-05 Pièces moulées en plastique et leur production

Country Status (4)

Country Link
US (1) US20100119798A1 (fr)
EP (1) EP2142352A1 (fr)
DE (1) DE102007017978A1 (fr)
WO (1) WO2008122428A1 (fr)

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