EP2115062A1 - Matières à mouler pour des corps moulés en polyacrylate dépolis - Google Patents

Matières à mouler pour des corps moulés en polyacrylate dépolis

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Publication number
EP2115062A1
EP2115062A1 EP07822001A EP07822001A EP2115062A1 EP 2115062 A1 EP2115062 A1 EP 2115062A1 EP 07822001 A EP07822001 A EP 07822001A EP 07822001 A EP07822001 A EP 07822001A EP 2115062 A1 EP2115062 A1 EP 2115062A1
Authority
EP
European Patent Office
Prior art keywords
molding composition
iso
weight
composition according
acrylate
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Withdrawn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
EP07822001A
Other languages
German (de)
English (en)
Inventor
Klaus Schultes
Ursula Golchert
Stefan Nau
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.)
Roehm GmbH Darmstadt
Original Assignee
Evonik Roehm 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 Evonik Roehm GmbH filed Critical Evonik Roehm GmbH
Publication of EP2115062A1 publication Critical patent/EP2115062A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/16—Solid spheres
    • C08K7/18—Solid spheres inorganic
    • 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
    • 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
    • C08K7/22—Expanded, porous or hollow particles
    • C08K7/24—Expanded, porous or hollow particles inorganic
    • C08K7/26—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]

Definitions

  • the invention relates to a molding compound for matted molded body and the corresponding moldings and their use.
  • PMMA Polymethyl methacrylate
  • the masses are usually extruded or injection-molded into moldings.
  • These moldings are characterized by the typical PMMA properties, such as high scratch resistance, weather resistance, heat resistance, excellent mechanical properties, such as tensile modulus and good stress cracking resistance.
  • extruded or co-extruded PMMA moldings are very versatile: extruded or co-extruded sheets are used both for the exterior, especially for automotive components, components, sporting goods surfaces and lamp covers, as well as indoors, especially in the furniture industry, for lighting covers and interior fittings of automobiles.
  • WO 02/068519 describes a solid surface material of a matrix, such. As PMMA, and dispersed therein ceramic beads, such as. B. W-410 Zeeospheres ®. The ceramic beads are provided with a functional coating that reacts with the resin of the matrix and covalently bonds the beads to the matrix.
  • the surface material of WO 02/068519 is characterized by a high flame resistance.
  • WO 03/054099 relates to an adhesive strip whose uppermost layer comprises a transparent resin and a matting agent, such as e.g. As ceramic beads includes.
  • WO 97/21536 discloses an extrusion process with which matting agents, such. B. ceramic beads, can bring in a thermoplastic polymer.
  • US 5,787,655 describes a non-slip film of a thermoplastic polymer into which inorganic beads, such as. B. ceramic beads are incorporated.
  • US 5,562,981 relates to the construction of a truck semi-trailer.
  • the sidewalls of the semi-trailer include fiber reinforced plastics, in which ceramic beads have been mixed to further strengthen the walls.
  • WO 2005/105377 discloses a composition of a thermoplastic having a processing temperature of at least 280 0 C, superabrasive particles and a filler, such as. B. ceramic beads. The composition is used for the production of abrasive utensils.
  • the aim of the present invention was to find a molding composition which can be used for the production of moldings with a fine-matte surface.
  • the molding composition should be producible and processable in the simplest possible way, in particular with relatively little energy expenditure.
  • the articles to be produced from the molding material should have the best possible optical and mechanical properties, the highest possible long-term stability and weathering resistance, and the most homogeneous possible matt surface with the lowest possible gloss.
  • the articles to be produced from the molding composition should preferably have a rough surface.
  • B) 0.5% to 15.0% by weight ceramic beads includes, where the molding composition has a volume-melt index MVR, measured according to ISO 1133 at 230 0 C and 3.8 kg in the range of 0.1 cm 3/10 min to 5.0 cm 3/10 min, it is possible in not readily predictable way to make available a molding composition that is ideal for the production of moldings with feinmattierter surface.
  • the molding composition can be produced and processed in a comparably simple manner, in particular with relatively little energy expenditure, and also enables the realization of sophisticated part geometries.
  • the articles which can be produced from the molding compound are distinguished by a combination of advantageous properties:
  • the polymer matrix A) consists of a (meth) acrylate (co) polymer or a mixture of (meth) acrylate (co) polymers.
  • the (meth) acrylate (co) polymer of the matrix comprises a homopolymer or copolymer of at least 80.0% by weight of methyl methacrylate and optionally up to 20.0% by weight of others with methyl methacrylate copolymerizable monomers.
  • the (meth) acrylate (co) polymer is suitably 80.0 wt .-% to 100.0 wt .-%, preferably 90.0 wt .-% - 99.5 wt .-%, of free-radically polymerized methyl methacrylate - Units and optionally to 0.0 wt .-% - 20.0 wt .-%, preferably to 0.5 wt .-% - 10.0 wt .-% of further radically polymehsierbaren comonomers, eg. B. C 1 - to C 4 -alkyl (meth) acrylates, in particular methyl acrylate, ethyl acrylate or butyl acrylate.
  • the average molecular weight M w of the matrix is preferably in the range from 90,000 g / mol to 200,000 g / mol, in particular from 95,000 g / mol to 180,000 g / mol.
  • the polymer matrix consists of a (meth) acrylate (co) polymer from 96.0 wt .-% to 100.0 wt .-%, preferably 97.0 wt .-% to 100.0 wt .-%, particularly preferably From 98.0% by weight to 100.0% by weight of methyl methacrylate and from 0.0% by weight to 4.0% by weight, preferably from 0.0% by weight to 3.0% by weight, in particular from 0.0% by weight to 2.0% by weight of methyl acrylate, ethyl acrylate and / or butyl acrylate.
  • a (meth) acrylate (co) polymer from 96.0 wt .-% to 100.0 wt .-%, preferably 97.0 wt .-% to 100.0 wt .-%, particularly preferably From 98.0% by weight to 100.0% by weight of methyl methacrylate and from 0.0% by weight to 4.0% by weight, preferably from 0.0% by weight to 3.0%
  • the (meth) acrylate (co) polymers preferably have a solution viscosity in chloroform at 25 ° C. (ISO 1628 part 6) of 45.0 ml / g to 80.0 ml / g, preferably 50.0 ml / g to 75 , 0 ml / g.
  • This may correspond to a weight average molecular weight M w ranging from 80,000 to 200,000 (g / mol), preferably from 100,000 to 170,000.
  • the molecular weight M w can be determined, for example, by gel permeation chromatography or by a scattered light method (see, for example, BHF Mark et al., Encyclopedia of Polymer Science and Engineering, 2nd Edition, Vol. 10, pages 1 et seq., J. Wiley, 1989). ,
  • the Vicaterweichungstemperatur VET (ISO 306-B50) is preferably at least 100 0 C, more preferably at least 104 0 C, even more preferably 104 ° C to 114 ° C and in particular 105 0 C to 110 ° C.
  • the volume of melt index MVR (ISO 1133, 230 0 C / 3.8 kg) of the polymer is favorably in the range of 0.5 cm 3/10 min to 5.0 cm 3/10 min, more preferably in the range of 1, 0 cm 3/10 min to 2.9 cm 3/10 min.
  • the (meth) acrylate (co) polymer of the matrix comprises a copolymer of methyl methacrylate, styrene and maleic anhydride.
  • the solution viscosity in chloroform at 25 ° C. is preferably greater than or equal to 65 ml / g, preferably 68 ml / g to 75 ml / g.
  • This may correspond to a molecular weight M w (weight average) of 130000 g / mol (determination of M w by gel permeation chromatography with reference to polymethyl methacrylate as calibration standard).
  • the molecular weight M w can be determined, for example, by gel permeation chromatography or by a scattered light method (see, for example, BHF Mark et al., Encyclopedia of Polymer Science and Engineering, 2nd Edition, Vol. 10, pages 1 et seq., J. Wiley, 1989).
  • the Vicat softening point VSP (ISO 306-B50) is preferably at least 112 ° C, more preferably 114 ° C to 124 ° C, in particular 118 ° C to 122 0 C.
  • the volume of melt index MVR (ISO 1133, 230 0 C / 3.8 kg) of the polymer is favorably in the range of 0.5 cm 3/10 min to 5.0 cm 3/10 min, more preferably in the range of 1, 0 cm 3/10 min to 2.9 cm 3/10 min.
  • methyl methacrylate 10% by weight to 20% by weight, preferably 12% by weight to 18% by weight of styrene and 5% by weight to 15% by weight, preferably 8% by weight to 12% by weight maleic anhydride.
  • polymer blends preferably comprise d) at least one low molecular weight (meth) acrylate (co) polymer, characterized by a solution viscosity in chloroform at 25 ° C. (ISO 1628 part 6) of less than or equal to 55 ml / g, preferably less than or equal to 50 ml / g, in particular 45 ml / g to 55 ml / g (This can be a molecular weight M w (weight average) of 95000 g / mol (determination of M w means of
  • Component d) preferably 25.0% by weight to 75.0% by weight, preferably 40.0
  • the components d) and e) expediently in each case a copolymer of methyl methacrylate, styrene and maleic anhydride.
  • Component f) is preferably a homopolymer or copolymer of at least 80% by weight of methyl methacrylate and optionally up to 20% by weight of further monomers copolymerizable with methyl methacrylate.
  • the component f) is expediently to 80.0 wt .-% to 100.0% by weight, preferably to 90.0 wt .-% - 99.5 wt .-%, of free-radically polymerized methyl methacrylate units and optionally to 0.0 wt .-% - 20.0 wt .-%, preferably to 0.5 wt .-% - 10 wt .-% of other free-radically polymerizable comonomers, eg. B. C 1 - to C 4 -alkyl (meth) acrylates, in particular methyl acrylate, ethyl acrylate or butyl acrylate.
  • the average molecular weight M w of the matrix is in the range from 90,000 g / mol to 200,000 g / mol, in particular 100,000 g / mol to 150,000 g / mol.
  • Component f) is preferably a copolymer of 95.0% by weight to 99.5% by weight of methyl methacrylate and 0.5% by weight to 5.0% by weight, preferably 1.0% by weight. to 4.0% by weight of methyl acrylate.
  • the component f) preferably has a Vicaterweichungstemperatur VET (ISO 306-B50) of at least 107 0 C, more preferably from 108 0 C to 114 ° C on.
  • the volume of melt index MVR (ISO 1133, 230 0 C / 3.8 kg) is preferably greater than / equal to 2.5 cm 3/10 min.
  • EP-A 264 590 describes, for. Example, a method for producing a molding composition from a monomer mixture of methyl methacrylate, vinyl aromatic, maleic anhydride and optionally from a lower alkyl acrylate, wherein the polymerization is carried out to a conversion of 50% in the presence or absence of a non-polymerizable organic solvent and in which the polymerization is continued from a conversion of at least 50% in the temperature range from 75 ° C to 150 0 C in the presence of an organic solvent to a conversion of at least 80% and then the low molecular weight volatiles are evaporated.
  • JP-A 60-147 417 a process for the preparation of a highly thermally stable polymethacrylate molding composition is described in which a monomer mixture of methyl methacrylate, maleic anhydride and at least one vinyl aromatic in a polymerization reactor, which is suitable for solution or bulk polymerization, at a temperature of 100 0 C to 180 0 C is fed and polymehsiert.
  • DE-OS 44 40 219 describes a further production process.
  • the component A) may, for. Example, be prepared by a monomer mixture of 3000 g of methyl methacrylate, 600 g of styrene and 400 g of maleic anhydride with 1.68 g of dilauroyl peroxide and 0.4 g of tert-Butylpehsononanoat as a polymerization initiator, 6.7 g of 2-mercaptoethanol as a molecular weight regulator, and g of 2- (2-hydroxy-5-methylphenyl) benzotriazole is added as UV absorber and 4 g of palmitic acid as mold release agent.
  • the resulting mixture is placed in a polymerization chamber and degassed for 10 minutes. Thereafter, the water bath for 6 hours at 60 0 C and 25 hours polymerized at 50 0 C water bath temperature. After about 25 hours, the polymerization mixture reaches its maximum temperature at 144 ° C. After removal of the Polymehsations, the polymer is annealed for 12 hours at 120 0 C in an air cabinet.
  • the resulting copolymer is clear and has a yellowness value according to DIN 6167 (D65 / 10 0 ) of 1.4 on an 8 mm thick press plate and a light transmission TD65 according to DIN 5033/5036 of 90.9%.
  • the Vicat softening temperature VET of the copolymehseate is ISO according to ISO306-B50 121 0 C, the reduced viscosity nsp / c 65 ml / g corresponding to an average molecular weight M w of about 130,000 daltons (based on a polymethyl methacrylate standard).
  • the component d) may, for. Example, be prepared by reacting a monomer mixture of z. B. 6355 g of methyl methacrylate, 1271 g of styrene and 847 g of maleic anhydride with 1, 9 g of tert-Butylperneodecanoat and 0.85 g of tert-butyl peroxy-3,5,5-trimethylhexanoate as a polymerization initiator and 19.6 g of 2-mercaptoethanol Molecular weight regulator and added to 4.3 g of palmitic acid. The resulting mixture can be filled in a polymerization chamber and z. B. degassed for 10 minutes. Thereafter, in a water bath z. B.
  • the molding composition of the invention further contains 0.5 wt .-% to 15.0 wt .-% ceramic beads.
  • Ceramics refer largely to inorganic, fine-grained raw materials formed with water at room temperature and then dried objects, which in a subsequent firing process sintered above 900 0 C to hard, durable objects.
  • the term also includes materials based on metal oxides.
  • fiber-reinforced ceramic materials such as. B. silicon carbide ceramics z. B. from silicon-containing organic polymers (polycarbosilanes) can be prepared as a starting material, the group of ceramics used in the invention.
  • the ceramic beads are expediently not covalently bonded to the polymer matrix and can in principle by physical separation methods, such as. B. extraction method with suitable solvents, such. As tetrahydrofuran (THF) are separated from the polymer matrix.
  • B. extraction method with suitable solvents such as tetrahydrofuran (THF) are separated from the polymer matrix.
  • THF tetrahydrofuran
  • the ceramic beads preferably have a spherical shape, with small deviations from the perfect spherical shape can occur naturally.
  • the ceramic beads expediently have a diameter in the range of 1 to 200 .mu.m.
  • the average diameter (median value D 50 ) of the ceramic beads is preferably in the range of 1, 0 .mu.m to 15.0 .mu.m.
  • the D95 value is preferably less than or equal to 35 ⁇ m, more preferably less than or equal to 13 ⁇ m.
  • the maximum diameter of the beads is preferably less than or equal to 40 microns, more preferably less than or equal to 13 microns.
  • the particle size of the beads is preferably determined by sieve analysis.
  • the density of the ceramic beads is favorably in the range of 2.1 g / cm 3 to 2.5 g / cm 3 .
  • the concrete composition of the ceramic beads is of minor importance to the present invention.
  • Preferred beads contain, in each case based on their total weight,
  • SiO 2 21, 0 wt .-% to 35.0 wt .-% Al 2 O 3 , up to 7.0 wt .-% Fe 2 O 3 , up to 11, 0 wt .-% Na 2 O and up to 6 , 0 wt .-% K 2 O.
  • the surface of the ceramic beads measured by BET nitrogen adsorption method, is preferably in the range of 0.8 m 2 / g to 2.5 m 2 / g.
  • the ceramic beads preferably have a compressive strength such that more than 90% of the beads can not be destroyed by applying a pressure of 410 MPa.
  • ceramic beads include the Zeeospheres ® by the company, 3M Germany, in particular the type W-210, W-410, G-200 and G-400th
  • the molding composition according to the invention preferably contains an impact modifier, more preferably an impact modifier based on crosslinked poly (meth) acrylates.
  • the impact modifier is preferably not covalently bound to the polymer matrix A).
  • component C) has a two- or three-shell structure.
  • Particularly preferred impact modifiers are polymerizate particles which have a two-layer, particularly preferably a three-layer core-shell structure and can be obtained by emulsion polymerization (see, for example, US Pat. EP-A 0 113 924, EP-A 0 522 351, EP-A 0 465 049 and EP-A 0 683 028).
  • Typical particle sizes of these emulsion polymers are in the range of 100 nm - 500 nm, preferably 200 nm - 450 nm.
  • a three-layer or three-phase structure with a core and two shells can be designed in particular as follows.
  • An innermost (hard) shell may, for. B is substantially methyl methacrylate, small amounts of comonomers, such as. For example, ethyl acrylate and a crosslinker, z. As allyl methacrylate, exist.
  • the middle (soft) shell can z. B. from butyl acrylate and optionally styrene and a crosslinker, z.
  • As allyl methacrylate be constructed, while the outermost (hard) shell substantially corresponds to the matrix polymer, whereby the compatibility and good binding to the matrix is effected.
  • the polybutyl acrylate content of the impact modifier is critical to the impact strength and is preferably in the range of 20.0 wt% to 40.0 wt%, more preferably in the range of 25.0 wt% to 40.0 wt .-%.
  • EP-A 0 113 924 EP-A 0 522 351, EP-A 0 465 049 EP-A 0 683 028 and US 3,793,402.
  • a very suitable commercially available product is z. B. METABLEN® IR 441 Fa Mitsubishi Rayon.
  • the molding composition are suitably from 5.0 wt .-% to 50.0 wt .-%, preferably 10.0 wt .-% to 20.0 wt .-%, particularly preferably 10.0 wt .-% to 15, 0 wt .-% of an impact modifier which is an elastomeric phase of crosslinked Polymerisatteilchen included.
  • the impact modifier is obtained in a manner known per se by bead polymerization or by emulsion polymerization.
  • the impact modifier is crosslinked particles having a middle content obtainable by means of bead polymerization Particle size in the range of 50 microns to 500 microns, preferably 80 microns to 120 microns.
  • These usually consist of at least 40.0 wt .-%, preferably 50.0 wt .-% - 70.0 wt .-% of methyl methacrylate, 20.0 wt .-% to 40.0 wt .-%, preferably 25.0 wt .-% to 35.0 wt .-% butyl acrylate and 0.1 wt .-% to 2.0 wt .-%, preferably 0.5 wt .-% to 1, 0 wt .-% of a crosslinking monomers, e.g. B. a polyfunctional (meth) acrylate such. B. allyl methacrylate and optionally other monomers such.
  • a crosslinking monomers e.g. B. a polyfunctional (meth) acrylate such.
  • Example 0.0 wt .-% to 10.0 wt .-%, preferably 0.5 wt .-% to 8.0 wt .-% of Ci-C 4 alkyl (meth) acrylates, such as ethyl acrylate or butyl acrylate , preferably methyl acrylate, or other vinylically polymehsierbaren monomers such as. Styrene.
  • Ci-C 4 alkyl (meth) acrylates such as ethyl acrylate or butyl acrylate , preferably methyl acrylate, or other vinylically polymehsierbaren monomers such as. Styrene.
  • the molding composition according to the invention can still conventional additives, auxiliaries and / or fillers, such as. B. thermal stabilizers, UV stabilizers, UV absorbers, antioxidants, in particular soluble or insoluble dyes or colorants.
  • UV stabilizers and radical scavengers UV stabilizers and radical scavengers
  • Optional UV protectants are z.
  • benzophenone whose substituents such as hydroxyl and / or alkoxy groups are usually in the 2- and / or 4-position. These include 2-hydroxy-4-n-octoxybenzophenone, 2,4-dihydroxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2 ', 4,4'-tetrahydroxybenzophenone, 2,2'-dihydroxy-4, 4'-dimethoxybenzophenone, 2-hydroxy-4-methoxybenzophenone.
  • substituted benzothiazoles are very suitable as UV protection additive, including especially 2- (2-hydroxy-5-methylphenyl) - benzotriazole, 2- [2-hydroxy-3,5-di- (alpha, alpha-dimethyl -benzyl) -phenyl] -benzotriazole, 2- (2-hydroxy-3,5-di-t-butylphenyl) -benzotriazole, 2- (2-hydroxy-3, 5-butyl-5-methylphenyl) -5-chlorobenzthazole , 2- (2-hydroxy-3,5-di-t-butylphenyl) -5-chlorobenzotriazole, 2- (2-hydroxy-3,5-di-t-amylphenyl) -benzotriazole, 2- (2-hydroxybenzoyl) 5-t butylphenyl) -benzotriazole, 2- (2-hydroxy-3-sec-butyl-5-t-butylphenyl) -benzotriazole and 2- (2-hydroxy
  • UV protectants which can also be used are 2-cyano-3,3-diphenylacrylic acid ethyl ester, 2-ethoxy-2'-ethyl-oxalic acid bisanilide, 2-ethoxy-5-t-butyl-2'-ethyl-oxalic acid bisanilide and substituted phenyl benzoate.
  • the UV protectants can be present as low molecular weight compounds, as indicated above, in the polymethacrylate compositions to be stabilized. But it can also UV-absorbing groups in the matrix polymer molecules covalently after copolymerization with polymerizable UV absorption compounds, such as. As acrylic, methacrylic or allyl derivatives of benzophenone or Benzthazoldehvaten be bound.
  • the proportion of UV protection agents is generally 0.01% by weight to 1.0% by weight, especially 0.01% by weight to 0 , 5 wt .-%, in particular 0.02 wt .-% to 0.2 wt .-% based on the totality of all constituents of Polymethacrylatharzes invention.
  • radical scavengers / UV stabilizers are hindered amines, which are known under the name HALS (JHindered Amine Light Stabilizer) are called. They can be used for the inhibition of aging processes in paints and plastics, in particular in polyolefin plastics (Kunstscher, 74 (1984) 10, pp. 620 to 623; Paint + Varnish, 96 Volume, 9/1990, pp. 689 to 693 ).
  • the stabilizing effect of the HALS compounds is due to the tetramethylpiperidine group contained therein. This class of compounds may be both unsubstituted and substituted with alkyl or acyl groups on the piperidine atom.
  • the sterically hindered amines do not absorb in the UV range. They catch formed radicals, which the UV absorbers can not do.
  • stabilizing HALS compounds which can also be used as mixtures are:
  • the radical scavengers / UV stabilizers are used in the molding compositions according to the invention in amounts of 0.01% by weight to 1.5% by weight, in particular in amounts of 0.02% by weight to 1.0% by weight. %, in particular in amounts of 0.02 wt .-% to 0.5 wt .-% based on the totality of all components.
  • Lubricants or mold release agents are of particular importance for the injection molding process, which can reduce or completely prevent possible adhesion of the molding compound to the injection mold.
  • As adjuvants can therefore lubricants, for. B. selected from the group of saturated fatty acids having less than C 2 o, preferably Ci 6 to Ci 8 carbon atoms or the saturated fatty alcohols containing less than C20, preferably C16 to C18 carbon atoms. Preference is given to small amounts of at most 0.25 wt .-%, z. B. 0.05 wt .-% to 0.2 wt .-%, based on the molding composition.
  • Suitable z As stearic acid, palmitic acid, technical mixtures of stearic and palmitic acid. Further suitable z. As n-hexadecanol, n-octadecanol, and technical mixtures of n-hexadecanol and n-octadecanol.
  • a particularly preferred slip-release agent is stearyl alcohol.
  • the molding composition a volume melt index MVR, measured according to ISO 1133 at 230 0 C and 3.8 kg in the range of 0.1 cm 3/10 min to 5.0 cm 3/10 min.
  • MVR is measured according to ISO 1133 at 230 0 C and 3.8 kg, preferably at least 0.2 cm 3/10 min, more preferably at least 0.3 cm 3/10 min, suitably at least 0.4 cm 3 / 10 min, in particular at least 0.5 cm 3/10 min.
  • the MVR measured according to ISO 1133 at 230 ° C and 3.8 kg, preferably less than 3.5 cm 3/10 min, more preferably less than 3.0 cm 3/10 min, advantageously less than 1, 5 cm 3 / 10 min, most preferably less than 1, 4 cm 3/10 min, especially less than 1, 1 cm 3/10 min and most preferably less than 0.9 cm 3/10 min.
  • the MVR measured according to ISO 1133 at 230 0 C and 3.8 kg, preferably in the range of 0.1 cm 3/10 min to 3.0 cm 3/10 min.
  • MVR measured according to ISO 1133 at 230 ° C and 3.8 kg, preferably in the range of 0.5 cm 3/10 min to 5.0 cm 3/10 min.
  • the molding composition according to the invention can be prepared by dry blending the components, which may be in the form of powders, granules or preferably granules. Furthermore, it can also be prepared by melting and blending the polymer matrix and optionally the toughening modifier in the melt state or by melting dry premixes of individual components and adding the ceramic beads. This can be z. B. in single or twin-screw extruders. The resulting extrudate can then be granulated. Usual additives, auxiliaries and / or fillers can be added directly or added later by the end user as needed. Processing into moldings
  • the molding composition of the invention is suitable as a starting material for the production of moldings with lecturmatter and preferably rough surface.
  • the transformation of the molding composition can be known per se, for. B. by processing over the elastoviskosen state, d. H. by kneading, rolling, calendering, extruding or injection molding, wherein extrusion and injection molding, in particular extrusion, are preferred in the present case.
  • the injection molding of the molding composition can be carried out in known manner at temperatures in the range of 220 0 C - 260 0 C (melt temperature) and a mold temperature of preferably 60 ° C to 90 0 C.
  • a mold temperature of preferably 60 ° C to 90 0 C.
  • the extrusion is preferably carried out at a temperature of 220 ° C to 260 ° C.
  • the roughness value R z according to DIN 4768 is expediently greater than or equal to 0.3 ⁇ m, preferably at least 0.7 ⁇ m, particularly preferably between 2.5 ⁇ m and 20.0 ⁇ m.
  • the degree of gloss (R 60 °) according to DIN 67530 (01/1982) is preferably at most 45%, particularly preferably at most 38%.
  • the transmission according to DIN 5036 is preferably in the range of 40% to 93%, particularly preferred in the range of 55% to 93%, in particular in the range of 55% to 85%.
  • the intensity half-value angle according to DIN 5036 is preferably in the range of 1 ° to 55 °, more preferably in the range of 2 ° to 40 °, in particular in the range of 8 ° to 37 °.
  • the Vicaterweichungstemperatur VET (ISO 306-B50) of the molding is preferably at least 90 0 C, more preferably at least 95 ° C, most preferably at least 100 0 C and is suitably between 90 0 C and 170 0 C, in particular between 102 ° C and 130 ° C.
  • the shaped body preferably has one or more, more preferably as many as possible, of the following properties:
  • Such moldings are usually obtained from molding compositions containing no impact modifier.
  • the Vicaterweichungstemperatur VET (ISO 306-B50) of the molding is preferably at least 90 0 C, more preferably at least 95 ° C and is suitably between 90 0 C and 170 ° C, in particular between 95 ° C and 110 ° C.
  • the shaped body preferably has one or more, particularly preferably as many, of the following properties:
  • Such moldings are usually obtained from molding compositions containing at least one impact modifier.
  • the moldings according to the invention can be used, in particular, as parts of household appliances, communication devices, hobby or sports equipment, body parts or parts of body parts in automobile, ship or aircraft construction, as parts for lighting, signs or symbols, outlets or cosmetics sales stands, containers, home or office decorations , Furniture applications, shower doors and office doors, and as parts, in particular panels, used in the construction industry, as walls, in particular as noise barriers, as window frames, benches, lighting covers, diffusers and automotive glazing.
  • Typical automobile exterior parts are z. As spoilers, panels, roof modules or exterior mirror housing.
  • PLEXIGLAS ® 7H As a polymer matrix PLEXIGLAS ® 7H, PLEXIGLAS ® 8N, PLEXIGLAS ® zk6BR and PLEX ® 8908F of the company. Roehm GmbH was used.
  • the individual components were mixed by means of single-screw extruders.
  • the compositions of the individual examples are documented in Table 1.
  • the volume flow index MVR test standard ISO 1133: 1997) and the density of the molding compositions was determined.
  • Test specimens were produced by injection molding and ribbon extrusion from the blended molding compositions. During processing, metal abrasion was not detected in either tape extrusion or injection molding. The corresponding test pieces were tested according to the following methods:
  • E-modulus determination of modulus of elasticity (test standard:
  • Ra values ⁇ 2 ⁇ m were determined with a cut-off of 0.8 mm, with Ra> 2 ⁇ m with a cut-off of 2.5 mm.
  • the roughness measurements were carried out using a Form Talysurf 50, manufacturer is the Rank Taylor Hobson GmbH.
  • Modulus of elasticity (1 mm / min) [MPa] 1760 1800 1870 1990 1510 1500 1570 1670
  • Linear expansion coefficient 9.6 9.7 9.5 9.1 1, 1 1, 2 1, 1 1, 0

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)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

L'invention concerne une matière à mouler contenant, par rapport au poids total de la matière à mouler, A) 49,5 à 99,5 % en poids d'une matrice polymère composée d'un (co)polymère de (méth)acrylate ou d'un mélange de (co)polymères de (méth)acrylate; et B) 0,5 à 15,0 % en poids de perles de céramique, la matière à mouler présentant un indice de fusion volumique (MVR), mesuré selon ISO 1133 à 230 °C et 3,8 kg, de 0,1 cm<SUP>3</SUP> / 10 min à 5,0 cm<SUP>3</SUP> / 10 min. La matière à mouler peut être employée pour la fabrication de corps moulés à surface dépolie de type velours, de préférence rugueuse. De tels corps moulés servent particulièrement de pièces d'appareils ménagers, d'appareils de communication, d'équipements de loisir et de sport, d'éléments de carrosserie ou de pièces d'éléments de carrosserie dans la construction automobile, navale ou aéronautique, de pièces d'éclairages, d'insignes ou de symboles, de points de vente ou de stands de vente de cosmétiques, de contenants, de décorations domestiques ou de bureau, de pièces de meubles, de portes de douche, de portes de bureau, et de pièces dans le bâtiment, par exemple de parois, de cadres de fenêtres, de bancs, de couvercles de lampes, de verre diffusant et de vitres de véhicules.
EP07822001A 2007-01-30 2007-10-30 Matières à mouler pour des corps moulés en polyacrylate dépolis Withdrawn EP2115062A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007005432A DE102007005432A1 (de) 2007-01-30 2007-01-30 Formmassen für mattierte Polyacrylat-Formkörper
PCT/EP2007/061647 WO2008092516A1 (fr) 2007-01-30 2007-10-30 Matières à mouler pour des corps moulés en polyacrylate dépolis

Publications (1)

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EP2115062A1 true EP2115062A1 (fr) 2009-11-11

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US (1) US20100098907A1 (fr)
EP (1) EP2115062A1 (fr)
JP (1) JP5156761B2 (fr)
KR (1) KR20090111828A (fr)
CN (1) CN101578333A (fr)
BR (1) BRPI0721404A2 (fr)
CA (1) CA2676988A1 (fr)
DE (1) DE102007005432A1 (fr)
MX (1) MX2009007646A (fr)
RU (1) RU2009132414A (fr)
TW (1) TW200902621A (fr)
WO (1) WO2008092516A1 (fr)

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Publication number Publication date
RU2009132414A (ru) 2011-03-10
KR20090111828A (ko) 2009-10-27
TW200902621A (en) 2009-01-16
BRPI0721404A2 (pt) 2014-03-04
CA2676988A1 (fr) 2008-08-07
WO2008092516A1 (fr) 2008-08-07
DE102007005432A1 (de) 2008-07-31
MX2009007646A (es) 2009-07-27
JP5156761B2 (ja) 2013-03-06
JP2010516875A (ja) 2010-05-20
CN101578333A (zh) 2009-11-11
US20100098907A1 (en) 2010-04-22

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