WO1999019404A1 - Thermosetting bmc composition and method for making same - Google Patents

Thermosetting bmc composition and method for making same Download PDF

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Publication number
WO1999019404A1
WO1999019404A1 PCT/FR1998/002193 FR9802193W WO9919404A1 WO 1999019404 A1 WO1999019404 A1 WO 1999019404A1 FR 9802193 W FR9802193 W FR 9802193W WO 9919404 A1 WO9919404 A1 WO 9919404A1
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WO
WIPO (PCT)
Prior art keywords
composition according
composition
thermosetting
polyester textile
polyester
Prior art date
Application number
PCT/FR1998/002193
Other languages
French (fr)
Inventor
Lionel Landru
Original Assignee
Bulk Molding Compounds Inc.
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 Bulk Molding Compounds Inc. filed Critical Bulk Molding Compounds Inc.
Priority to AU95449/98A priority Critical patent/AU9544998A/en
Publication of WO1999019404A1 publication Critical patent/WO1999019404A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/06—Unsaturated polyesters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/37—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors characterised by their material, surface treatment or coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/24—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2367/06—Unsaturated polyesters

Abstract

The invention concerns a thermosetting BMC composition comprising a thermosetting resin and a mechanical reinforcing filler consisting of polyester textile fibres having a thermal softening threshold higher than 140° Celsius, manufactured by the KURARAY company, and referenced EP133. The invention is particularly useful for making frontage panels.

Description

COMPOSITION THERMODURCISSABLE DE TYPE BMC ET PROCEDE DE FABRICATION DE LA COMPOSITION THERMOSETTING COMPOSITION OF BMC TYPE AND METHOD FOR MANUFACTURING THE COMPOSITION
L'invention concerne une composition thermodurcissable de type BMC (Bulk Molding Compound - composition de moulage en vrac) utilisable pour la fabrication d'optiques de phare de véhicule automobile, de réflecteurs et autres pièces à surface lisse.The invention relates to a thermosetting composition of the BMC (Bulk Molding Compound) type which can be used for the manufacture of motor vehicle headlight optics, reflectors and other parts with a smooth surface.
Un phare, pour reprendre cet exemple, comprend une carcasse en thermoplastique et, à l'intérieur de la carcasse, l'optique en thermodurcissable destinée à recevoir une lampe et présentant un seuil thermique de ramollissement supérieur à la température de chauffage de la lampe, environ égale à 140° C.A headlight, to use this example again, comprises a thermoplastic carcass and, inside the carcass, the thermosetting optics intended to receive a lamp and having a thermal softening threshold higher than the heating temperature of the lamp, approximately equal to 140 ° C.
Le matériau de type BMC constituant l'optique de phare comprend une résine polyester et un renfort mécanique, souvent en fibres de verre.The material of the BMC type constituting the headlight optics comprises a polyester resin and a mechanical reinforcement, often made of glass fibers.
La fabrication de l'optique de phare comprend une opération de moulage destinée à mouler l'optique de phare en matériau BMC puis, la surface de l'optique de phare après moulage ayant un aspect rugueux dû à la présence de fibres de verre, une opération de vernissage destinée à rendre lisse l'aspect de la surface de l'optique de phare.The manufacture of the headlight optics comprises a molding operation intended to mold the headlight optics in BMC material then, the surface of the headlight optics after molding having a rough appearance due to the presence of glass fibers, a varnishing operation intended to smooth the appearance of the surface of the headlight optics.
L'opération de vernissage terminée, on peut alors aluminer l'optique de phare. On procède sous vide, en plaçant l'optique, après moulage, dans une enceinte sous vide contenant une barrette d'aluminium et une résistance, puis en déposant sur la surface de vernis une couche d'aluminium par ionisation. Cependant, l'alumi iage sous vide est une opération lourde et, de surcroît, ne procure pas, sans vernissage, un résultat satisfaisant, la surface de l'optique ayant alors un aspect de miroir brouillé.The varnishing operation finished, we can then light the headlight optics. The process is carried out under vacuum, by placing the optics, after molding, in a vacuum enclosure containing an aluminum strip and a resistor, then by depositing on the varnish surface a layer of aluminum by ionization. However, vacuum vacuuming is a cumbersome operation and, moreover, does not provide, without varnishing, a satisfactory result, the surface of the optics then having the appearance of a scrambled mirror.
Une autre solution pour donner à l'optique de phare un aspect de surface lisse consiste à remplacer les fibres de verre par des fibres synthétiques. De telles fibres présentent l'avantage de permettre l'aluminiage direct mais également l'inconvénient de fondre le plus souvent entre 80° C et 140° C.Another solution to give the headlight optics a smooth surface appearance is to replace the glass fibers with synthetic fibers. Such fibers have the advantage of allowing direct aluminizing but also the disadvantage of melting most often between 80 ° C and 140 ° C.
L'invention propose un nouveau matériau de type BMC utilisable pour la fabrication d'objets à surface lisse et résistant à des températures élevées. A cet effet, l'invention concerne une composition thermodurcissable de type BMC comprenant une résine thermodurcissable et une charge de renforcement mécanique, caractérisée par le fait que la charge de renforcement mécanique est constituée de fibres textiles de polyester ayant un seuil thermique de ramollissement supérieur à 140° Celsius.The invention provides a new material of BMC type usable for the manufacture of objects with a smooth surface and resistant to high temperatures. To this end, the invention relates to a thermosetting composition of BMC type comprising a thermosetting resin and a mechanical reinforcing filler, characterized in that the mechanical reinforcing filler consists of polyester textile fibers having a thermal softening threshold greater than 140 ° Celsius.
Grâce à cela, on supprime les inconvénients des fibres de verre qui non seulement procuraient un aspect de surface rugueux, mais favorisaient également la conduction de l'humidité en créant des occlusions d'air et d'eau.Thanks to this, the disadvantages of glass fibers are eliminated, which not only provided a rough surface appearance, but also favored the conduction of moisture by creating air and water occlusions.
Les fibres textiles polyester fabriquées par la société KURARAY conviennent bien.The polyester textile fibers produced by the company KURARAY are very suitable.
Les fibres synthétiques du matériau de l'invention étaient auparavant utilisées dans le domaine du textile très éloigné de celui des matériaux de type BMC notamment utilisés pour la fabrication de pièces de véhicule automobile. La demanderesse a donc eu l'audace de rechercher la solution à son problème dans un domaine d'application très éloigné du sien et que ni le problème posé ni l'état de la technique ne suggéraient.The synthetic fibers of the material of the invention were previously used in the textile field very far from that of BMC type materials used in particular for the manufacture of motor vehicle parts. The plaintiff therefore had the audacity to seek the solution to her problem in a field of application very far from hers and which neither the problem posed nor the state of the art suggested.
La fibre textile polyester de la société KURARAY de référence EPI 33 convient encore mieux.The polyester textile fiber from KURARAY, reference EPI 33 is even better.
Avantageusement, la résine est en polyester.Advantageously, the resin is made of polyester.
Avantageusement encore, la composition de l'invention comprend au moins l'un des éléments du groupe comportant un additif anti-retrait, un agent de démoulage, un catalyseur, une charge neutre et un agent anti-feu.Advantageously also, the composition of the invention comprises at least one of the elements of the group comprising an anti-shrinkage additive, a mold release agent, a catalyst, a neutral filler and an anti-fire agent.
L'invention sera mieux comprise à l'aide de la description suivante d'une forme de réalisation particulière de la composition de l'invention en référence au tableau ci-dessous. TableauThe invention will be better understood with the aid of the following description of a particular embodiment of the composition of the invention with reference to the table below. Board
Figure imgf000005_0001
Figure imgf000005_0001
La composition de type BMC (Bul Molding Compound - composition de moulage en vrac) comprend ici, dans les proportions indiquées dans le tableau, une résine polyester pure maléique, une charge de renforcement mécanique et divers adjuvants, en l'espèce un additif anti-retrait constitué d'un mélange de styrène et de PVAC (acétate de polyvinyle), un agent de démoulage en stéarate de calcium, une charge neutre pondérale en carbonate de calcium destinée à augmenter le poids de la composition et un catalyseur de réticulation, autrement dit de polymérisation, en peroctoate de ter-butyl.The composition of the BMC (Bul Molding Compound) type here comprises, in the proportions indicated in the table, a pure maleic polyester resin, a filler of mechanical reinforcement and various additives, in this case an anti-additive shrinkage consisting of a mixture of styrene and PVAC (polyvinyl acetate), a release agent in calcium stearate, a weight neutral charge in calcium carbonate intended to increase the weight of the composition and a crosslinking catalyst, in other words polymerization, in ter-butyl peroctoate.
La charge de renforcement mécanique est constituée en fibres textiles polyester de référence EPI 33 de la société KURARAY. De telles fibres présentent un seuil de ramollissement thermique d'environ 210° C et constituent un bon renfort mécanique.The mechanical reinforcement filler consists of polyester textile fibers of reference EPI 33 from the company KURARAY. Such fibers have a thermal softening threshold of approximately 210 ° C. and constitute good mechanical reinforcement.
Le procédé de fabrication de la composition de type BMC décrite ci-dessus va maintenant être décrit, sont indiquées dans le tableau.The process for manufacturing the composition of BMC type described above will now be described, are indicated in the table.
On prend les fibres textiles polyester solides de la société KURARAY solide et on les mouille dans la résine polyester pure maléique liquide, dans les proportions indiquées dans le tableau. On mélange le tout dans un mélangeur pendant environ dix minutes.The solid polyester textile fibers from the solid KURARAY company are taken and wetted in pure liquid maleic polyester resin, in the proportions indicated in the table. We mix everything in one blender for about ten minutes.
Puis on incorpore dans le mélangeur la charge neutre, le catalyseur de polymérisation, l'additif anti-retrait et l'agent de démoulage, dans les proportions du tableau.Then the neutral charge, the polymerization catalyst, the anti-shrinkage additive and the release agent are incorporated into the mixer, in the proportions shown in the table.
On pourrait également envisager d'ajouter d'autres adjuvants, selon l'application à laquelle est destinée la composition, comme une charge anti- feu en alumines pour la fabrication de transformateurs électriques par exemple.One could also consider adding other adjuvants, depending on the application for which the composition is intended, such as an anti-fire charge of aluminas for the manufacture of electrical transformers for example.
On mélange la mixture de résine polyester et de fibres textiles polyester KURARAY avec les différents adjuvants pendant quelques minutes. Puis on tire la composition du mélangeur avant de l'emballer dans des emballages destinés à être adressés à un mouleur.The mixture of polyester resin and KURARAY polyester textile fibers is mixed with the various additives for a few minutes. Then the composition of the mixer is drawn before packaging it in packaging intended to be addressed to a moulder.
La fabrication d'une optique de phare de véhicule automobile en matériau de type BMC va maintenant être décrite.The manufacture of a headlight optic for a motor vehicle in BMC type material will now be described.
Chez le mouleur, on remplit un moule ayant la forme de l'optique de phare avec la composition de type BMC décrite ci-dessus puis on réticule le contenu du moule de façon classique.In the moulder, a mold having the shape of the headlight optic is filled with the composition of the BMC type described above, then the content of the mold is crosslinked in a conventional manner.
Après moulage, on sort l'optique de phare de son moule puis on l'alumine directement. Pour l'alurniniage direct, on place l'optique dans une enceinte sous vide, avec une barrette d'aluminium et une résistance, et on dépose une couche d'aluminium sur l'optique de phare par ionisation sous vide.After molding, the headlight optics are removed from its mold and then alumina directly. For direct aluminization, the optics are placed in a vacuum enclosure, with an aluminum strip and a resistor, and a layer of aluminum is deposited on the headlight optics by vacuum ionization.
Après l'aluminiage, la surface de l'optique de phare présente un aspect parfaitement lisse et le matériau de type BMC de constitution de l'optique présente un seuil thermique de ramollissement sensiblement égal à 210° C.After aluminizing, the surface of the headlight optics has a perfectly smooth appearance and the material of BMC type of constitution of the optics has a thermal softening threshold substantially equal to 210 ° C.
Le matériau de type BMC avec renfort mécanique en fibres textiles polyester de la société KURARAY pourrait également être utilisé pour la fabrication de plaques intercalaires de transformateur électrique destinées à résister à un courant d'environ 400 Ampères, ou encore pour la fabrication de sous-stations de relais pour voies ferrées, et autres pièces mécaniques statiques, non destinées à être soumises à d'importantes contraintes mécaniques, mais devant résister à un fort échauffement. A la place de la fibre textile polyester de la société KURARAY référencée EP 133, on pourrait envisager d'utiliser d'autres fibres textiles polyester présentant un seuil thermique de ramollissement supérieur à 140°C.The BMC type material with mechanical reinforcement in polyester textile fibers from the company KURARAY could also be used for the manufacture of intermediate transformer plates intended to withstand a current of approximately 400 amperes, or also for the manufacture of substations relays for railways, and other static mechanical parts, not intended to be subjected to significant mechanical stresses, but which must withstand high temperature rise. Instead of the polyester textile fiber from the company KURARAY referenced EP 133, one could consider using other polyester textile fibers having a thermal softening threshold greater than 140 ° C.
On a considéré, dans la composition BMC, une résine polyester. Dans d'autres circonstances, on pourrait envisager une résine vinylester. A polyester resin was considered in the composition BMC. In other circumstances, one could consider a vinylester resin.

Claims

REVENDICATIONS
1- Composition thermodurcissable de type BMC comprenant une résine thermodurcissable et une charge de renforcement mécanique, caractérisée par le fait que la charge de renforcement mécanique est constituée de fibres textiles de polyester ayant un seuil thermique de ramollissement supérieur à 140° Celsius.1- BMC type thermosetting composition comprising a thermosetting resin and a mechanical reinforcement filler, characterized in that the mechanical reinforcement filler consists of polyester textile fibers having a thermal softening threshold greater than 140 ° Celsius.
2- Composition selon la revendication 1, dans laquelle les fibres textiles polyester sont fabriquées par la société KURARAY.2- Composition according to claim 1, wherein the polyester textile fibers are manufactured by the company KURARAY.
3- Composition selon la revendication 2, dans laquelle les fibres textiles polyester de la société KURARAY sont référencées EPI 33.3. Composition according to claim 2, in which the polyester textile fibers from the company KURARAY are referenced EPI 33.
4- Composition selon l'une des revendications 1 à 3, dans laquelle la résine est en polyester.4- Composition according to one of claims 1 to 3, wherein the resin is polyester.
5- Composition selon l'une des revendications 1 à 4, comprenant au moins l'un des éléments du groupe comportant un additif anti-retrait, un agent de démoulage, un catalyseur, une charge neutre et un agent anti-feu.5- Composition according to one of claims 1 to 4, comprising at least one of the elements of the group comprising an anti-shrinkage additive, a release agent, a catalyst, a neutral filler and an anti-fire agent.
6- Application de la composition selon l'une des revendications 1 à 5, pour la fabrication d'une optique de phare pour véhicule automobile.6- Application of the composition according to one of claims 1 to 5, for the manufacture of a headlight optics for a motor vehicle.
7- Application de la composition selon l'une des revendications 1 à 5, pour la fabrication d'un transformateur électrique. 7- Application of the composition according to one of claims 1 to 5, for the manufacture of an electrical transformer.
PCT/FR1998/002193 1997-10-14 1998-10-13 Thermosetting bmc composition and method for making same WO1999019404A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU95449/98A AU9544998A (en) 1997-10-14 1998-10-13 Thermosetting bmc composition and method for making same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR97/12806 1997-10-14
FR9712806A FR2769634A1 (en) 1997-10-14 1997-10-14 Bulk moulded composition, used in car headlights and electrical transformers

Publications (1)

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WO1999019404A1 true WO1999019404A1 (en) 1999-04-22

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1443519A (en) * 1972-08-25 1976-07-21 Bp Chem Int Ltd Moulding process
EP0355059A2 (en) * 1988-08-17 1990-02-21 Scott Bader Company Limited Thickened moulding compositions
DE4415102A1 (en) * 1994-04-29 1995-11-02 Basf Ag Headlamp reflectors that can be directly metallized

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1443519A (en) * 1972-08-25 1976-07-21 Bp Chem Int Ltd Moulding process
EP0355059A2 (en) * 1988-08-17 1990-02-21 Scott Bader Company Limited Thickened moulding compositions
DE4415102A1 (en) * 1994-04-29 1995-11-02 Basf Ag Headlamp reflectors that can be directly metallized

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Publication number Publication date
FR2769634A1 (en) 1999-04-16
AU9544998A (en) 1999-05-03

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