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WO2010052262A1 - Feuilles avec une tenue élevée au styrène - Google Patents

Feuilles avec une tenue élevée au styrène Download PDF

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Publication number
WO2010052262A1
WO2010052262A1 PCT/EP2009/064668 EP2009064668W WO2010052262A1 WO 2010052262 A1 WO2010052262 A1 WO 2010052262A1 EP 2009064668 W EP2009064668 W EP 2009064668W WO 2010052262 A1 WO2010052262 A1 WO 2010052262A1
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WO
WIPO (PCT)
Prior art keywords
smc
release films
polyamide
olefin
copolymer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2009/064668
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German (de)
English (en)
Inventor
Holger Schmidt
Detlev Joachimi
Ulrich Plutowski
Wolfram Littek
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Lanxess Deutschland GmbH
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Lanxess Deutschland GmbH
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Filing date
Publication date
Application filed by Lanxess Deutschland GmbH filed Critical Lanxess Deutschland GmbH
Publication of WO2010052262A1 publication Critical patent/WO2010052262A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • 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
    • B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
    • B29C33/68—Release sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/22—Layered products comprising a layer of synthetic resin characterised by the use of special additives using plasticisers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • C08L77/04—Polyamides derived from alpha-amino carboxylic acids
    • 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
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • 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
    • B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0085—Copolymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/21—Anti-static
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/308—Heat stability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/71—Resistive to light or to UV
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/746—Slipping, anti-blocking, low friction
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing atoms other than carbon or hydrogen
    • C08L23/0869—Copolymers of ethene with unsaturated hydrocarbons containing atoms other than carbon or hydrogen with unsaturated acids, e.g. [meth]acrylic acid; with unsaturated esters, e.g. [meth]acrylic acid esters

Definitions

  • the present invention relates to films of thermoplastic molding compositions based on polyamides or polyesters and an olefin-acrylate copolymer with increased resistance to styrene and their uses as release films for covering styrene-containing casting resins or cast resin products.
  • Fiberglass mats impregnated with styrene-containing casting resin are a common commercial form of custom-made semi-finished products for use in shipbuilding, in the production of liquid tanks or in the construction of other shaped bodies.
  • the semifinished products impregnated with styrene-containing resin solutions must be externally supported Separating films are covered to prevent the escape of the liquid resin solution, the evaporation of the volatiles contained therein and an entry of impurities. Release films are therefore required for safe handling and processing of casting resins or resin-impregnated fiberglass mats.
  • EP-A-0 372 866 describes a process for the preparation of SMC composites using films made from an extruded mixture of a C 2 -C 20 alpha olefin copolymer and an aliphatic polyamide, wherein the alpha olefin copolymer is grafted with a grafting monomer Other selected from acrylic acid or methacrylic acid.
  • US-A-4 444 829 discloses an SMC release film of blends of polyamide 6 and copolymers of ethylene-ethyl acrylate or ethylene-methyl acrylate.
  • the object was to produce release foils for semi-finished liquid resin impregnated glass fiber mats, which are characterized by improved chemical resistance, which is characterized by a reduced permeability to volatile constituents of liquid casting resin.
  • the permeability of the films prepared from the compositions according to the invention is to be considered for styrene, since styrene is the main constituent of the volatiles in the casting resin with which the glass fiber mats used in said semifinished products are impregnated.
  • films of thermoplastic molding compositions based on polyamides or polyesters and an olefin-acrylate copolymer have improved chemical resistance with an associated improved barrier effect of the films produced therefrom for volatile constituents of casting resin.
  • the use of an olefin-acrylate copolymer of the type according to the invention leads to an improved, i. reduced permeability of the films for styrene.
  • the increased barrier effect of the release films from the molding compositions according to the invention for atmospheric oxygen leads to an improved curing result of styrene-containing casting resins due to the lack of oxygen-based polymerization inhibition in the outer resin layer.
  • the casting resin molding thus cures completely on the air-facing side to below the release film, whereby a stickiness of the resin surface is avoided after curing.
  • thermoplastic molding compositions of polyamides or polyesters, characterized in that the thermoplastic molding compositions contain at least one random copolymer of at least one olefin, preferably ⁇ -olefin and at least one acrylic acid ester of an aliphatic alcohol, wherein the MFI ( Melt Flow Index) of the copolymer B) is greater than 300 g / 10 min and the MFI at 190 0 C and a load of 2.16 kg is measured.
  • MFI Melt Flow Index
  • the present invention further relates to the use of the SMC release films as release films for semifinished products of liquid glass resin impregnated fiberglass mats.
  • the content of copolymer in the molding composition can be from 1 to 90% by weight, based on the weight of the overall molding composition. Preference is given to 2 to 50 wt .-%, particularly preferably 5 to 20 wt .-% of copolymer wherein the molding composition contains 10 to 99 wt .-% polyamide or polyester.
  • the invention also relates to the use of molding compositions containing
  • thermoplastic molding compositions according to the invention comprise at least one thermoplastic polyamide. Particularly preferred are both polyamide 6 and polyamide - -
  • thermoplastic molding compositions according to the invention may also contain blends of the described polyamides and other thermoplastic polymers such as polyphenylene oxide, polyethylene or polypropylene.
  • the polyamides contained in the thermoplastic molding compositions according to the invention can be prepared by various processes and synthesized from different building blocks.
  • For the preparation of polyamides a variety of procedures are known, depending on the desired end product different monomer units, various chain regulators are used to set a desired molecular weight or monomers with reactive groups for later intended aftertreatments.
  • the industrially relevant processes for the preparation of polyamides preferably to be used according to the invention are usually via the polycondensation in the melt.
  • the hydrolytic polymerization of lactams is understood as a polycondensation.
  • Preferred polyamides according to the invention are partially crystalline polyamides which can be prepared starting from diamines and dicarboxylic acids and / or lactams with at least 5 ring members or corresponding aminocarboxylic acids.
  • Suitable starting materials are aliphatic and / or aromatic dicarboxylic acids, particularly preferably adipic acid, 2,2,4-trimethyladipic acid, 2,4,4-trimethyladipic acid, azelaic acid, sebacic acid, isophthalic acid, terephthalic acid, aliphatic and / or aromatic diamines, particularly preferably tetramethylenediamine, Hexamethylenediamine, 1,9-nonanediamine, 2,2,4- and 2,4,4-trimethylhexamethylenediamine, the isomers diaminodicyclohexylmethane, diaminodicyclohexylpropanes, bis-aminomethyl-cyclohexane, phenylenediamines,
  • caprolactams most preferably ⁇ -caprolactam is used.
  • most particularly particularly preferred compounds are PA6, PA66 and other compounds based on aliphatic or / and aromatic polyamides or copolyamides, in which 3 to 11 methylene groups are present on a polyamide group in the polymer chain.
  • thermoplastic polymers to be used according to the invention in a further preferred embodiment as thermoplastic or component A) are selected from the group of polyesters, preferably polyalkylene terephthalates, particularly preferably polybutylene terephthalates and polyethylene terephthalates, very particularly preferably polybutylene terephthalate.
  • Preferred polyalkylene terephthalates can be prepared from terephthalic acid (or its reactive derivatives) and aliphatic or cycloaliphatic diols having 2 to 10 carbon atoms by known methods (Kunststoff-Handbuch, Vol. VIII, p. 695 ff, Karl Hanser Verlag, Kunststoff 1973).
  • Preferred polyalkylene terephthalates contain at least 80 mol%, preferably 90 mol%, based on the dicarboxylic acid, terephthalic acid residues and at least 80 mol%, preferably at least 90 mol%, based on the diol component, ethylene glycol and / or 1,3-propanediol - and / or butanediol-l, 4-radicals.
  • the preferred polyalkylene terephthalates may contain up to 20 mol% of radicals of other aromatic dicarboxylic acids having 8 to 14 carbon atoms or aliphatic dicarboxylic acid radicals having 4 to 12 carbon atoms, in particular radicals of phthalic acid, isophthalic acid, naphthalene-2,6-dicarboxylic acid , 4,4'-diphenyldicarboxylic acid, succinic acid, adipic acid, sebacic acid, azelaic acid, cyclohexanediacetic acid, cyclohexanedicarboxylic acid.
  • the preferred polyalkylene terephthalates in addition to ethylene or 1,3-propanediol or 4,9-butanediol, up to 20 Mo 1% of other aliphatic diols having 3 to 12 carbon atoms or cycloaliphatic diols having 6 to 21 carbon atoms.
  • Contain atoms in particular radicals of 1,3-propanediol, 2-ethylpropanediol-1,3-neopentyl glycol, pentanediol-1,5, hexanediol-1,6, cyclohexane-dimethanol-1,4,3-methylpentanediol-2,4, 2-methylpentanediol-2,4, 2,2,4-trimethylpentanediol-1,3 and -1,6,2-ethylhexanediol-1,3-2,2-diethylpropanediol-1,3-hexanediol-2,5, l, 4-di ( ⁇ -hydroxyethoxy) benzene, 2,2-bis (4-hydroxycyclohexyl) propane, 2,4-dihydroxy-1,1,3,3-tetramethylcyclobutane, 2,2-bis- (3-.beta.-hydroxyethoxyphenyl)
  • polyalkylene terephthalates which are prepared solely from terephthalic acid and its reactive derivatives, in particular their dialkyl esters, and ethylene glycol and / or 1,3-propanediol and / or 1,4-butanediol. Particular preference is given to using polyethylene and polybutylene terephthalate or mixtures of these polyalkylene terephthalates.
  • Preferred polyalkylene terephthalates are also copolyesters which consist of at least two of the abovementioned acid components and / or of at least two of the abovementioned Alcohol components are prepared, particularly preferred copolyesters s P o Iy- (ethylene glycol / butanediol-1, 4) terephthalates.
  • the polyalkylene terephthalates generally have an intrinsic viscosity of about 0.3 cffiVg to 1.5 cm / g, preferably 0.4 cm / g to 1.3 cm / g, more preferably 0.5 cm / g to 1.0 cm / g each measured in phenol / o-dichlorobenzene (1: 1 parts by wt.) at 25 ° C.
  • thermoplastic polyesters to be used according to the invention can also be used in a mixture with other polyesters and / or further polymers.
  • the molding compositions to be used according to the invention comprise random copolymers of at least one olefin, preferably ⁇ -olefin and at least one acrylic ester of an aliphatic alcohol, the MFI of the copolymer B) being greater than 300 g / 10 min.
  • the copolymer B) to less than 4 wt .-%, more preferably less than 1.5 wt .-% and most preferably to 0 wt .-% of monomer units, the other reactive functional groups selected from the group comprising epoxides, oxetanes, anhydrides, imides, aziridines, furans, acids, amines, oxazolines.
  • Suitable olefins preferably ⁇ -olefins, as a constituent of the copolymers B) preferably have between 2 and 10 carbon atoms and may be unsubstituted or substituted by one or more aliphatic, cycloaliphatic or aromatic groups.
  • Preferred olefins are selected from the group comprising ethene, propene, 1-butene, 1-pentene, 1-hexene, 1-octene, 3-methyl-1-pentene.
  • Particularly preferred olefins are ethene and propene, most preferably ethene.
  • the further reactive functional groups of the copolymer B selected from the group comprising epoxides, oxetanes, anhydrides, imides, aziridines, furans, acids, amines, oxazolines, are introduced exclusively via the olefins into the copolymer B).
  • the content of the olefin in the copolymer B) is between 50 and 90 wt .-%, preferably between 55 and 75 wt .-%.
  • the copolymer B) is further defined by the second component besides the olefin.
  • the second constituent used are alkyl esters or arylalkyl esters of acrylic acid, the alkyl - - or arylalkyl group of 1-30 carbon atoms is formed.
  • the alkyl or arylalkyl group may be linear or branched and may contain cycloaliphatic or aromatic groups, but may also be substituted by one or more ether or thioether functions.
  • Suitable acrylic esters in this context are also those synthesized from an alcohol component based on oligoethylene glycol or oligopropylene glycol having only one hydroxyl group and at most 30 carbon atoms.
  • the alkyl group or arylalkyl group of the acrylic ester may preferably be selected from the group comprising methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, sec-butyl, 1-pentyl, 1-hexyl, 2-hexyl, 3-hexyl, 1-heptyl, 3-heptyl, 1-octyl, 1- (2-ethyl) -hexyl, 1-nonyl, 1-decyl, 1-dodecyl, 1-lauryl or 1-octadecyl.
  • copolymers B) in which the olefin is copolymerized with 2-ethylhexyl acrylate. Also suitable are mixtures of the described acrylic acid esters.
  • Preferred here is the use of more than 60 wt .-%, more preferably more than 90 wt .-% and most preferably the use of 100 wt .-% of acrylic acid (2-ethyl) - hexyl ester based on the total amount of acrylic acid ester in the copolymer B).
  • the further reactive functional groups selected from the group comprising epoxides, oxetanes, anhydrides, imides, aziridines, furans, acids, amines, oxazolines of the copolymer B) are introduced exclusively into the copolymer B) via the acrylic esters.
  • the content of the acrylic acid ester in the copolymer B) is between 10 and 50 wt .-%, preferably between 25 and 45 wt .-%.
  • Suitable copolymers B) are characterized in addition to the composition by the low molecular weight. Accordingly, copolymers B) capable of handling the MFI value (melt flow index) measured at 190 0 C and a load of 2.16 kg, of greater than 300 g / 10 min are include for the inventive molding compositions. Preferred copolymers have an MFI of between 300 and 900 g / 10 min, more preferably between 400 and 800 g / 10 min, particularly preferably between 500 and 750 g / 10 min. Particularly preferred copolymers as component B) are selected from the group of the materials offered by the company Arkema under the brand name Lotryl EH, which are usually used as hot melt adhesive. The corresponding product under the trade name Lotryl ® 37 EH 550 is particularly preferred.
  • the molding compositions according to the invention in addition to the components A), B)
  • component C) is preferably stabilizers, more preferably UV stabilizers, heat stabilizers, gamma ray stabilizers, hydrolysis stabilizers, and
  • Antistatic agents emulsifiers, nucleating agents, plasticizers, processing aids,
  • Impact modifiers lubricants, mold release agents, antiblocking additives, dyes or
  • additives can be used alone or in admixture or in the form of masterbatches.
  • Stabilizers which are preferred according to the invention are sterically hindered phenols and / or phosphites, hydroquinones, aromatic secondary amines such as diphenylamines, substituted resorcinols, salicylates, benzotriazoles and benzophenones, as well as variously substituted representatives of these groups and / or mixtures thereof.
  • UV stabilizers various substituted resorcinols, salicylates, benzotriazoles or benzophenones are preferably used.
  • elastomer modifiers are generally copolymers which are preferably composed of at least two of the following monomers: ethylene, propylene, butadiene, isobutene, isoprene, chloroprene, vinyl acetate, styrene, acrylonitrile and acrylic or methacrylic acid esters with 1 to 18 C atoms in the alcohol component.
  • the copolymers may contain compatibilizing groups, e.g. Maleic anhydride or epoxide.
  • Dyes or pigments which are preferred according to the invention can be inorganic pigments, particularly preferably titanium dioxide, ultramarine blue, iron oxide, zinc sulfide or carbon black, and organic compounds - -
  • Pigments more preferably phthalocyanines, quinacridones, perylenes and dyes such as nigrosine and anthraquinones as colorants and other colorants.
  • Nucleating agents which are preferred according to the invention are sodium or calcium phenylphosphinate, aluminum oxide or silicon dioxide or talc, particularly preferably talc.
  • Inventively preferred sliding and / or mold release agents are long-chain fatty acids (eg stearic acid), their salts (eg Ca or Zn stearate) and their ester derivatives or amide derivatives (eg ethylene-bis-stearylamide), montan waxes (eg esters of montan acids with ethylene glycol) and low molecular weight polyethylene or polypropylene waxes.
  • Inventively particularly preferred lubricants and / or mold release agents are from the group of esters or amides of saturated or unsaturated aliphatic carboxylic acids having 8 to 40 carbon atoms with aliphatic saturated alcohols or amines having 2 to 40 carbon atoms.
  • Antiblocking additives which are preferred according to the invention are silica, other finely divided mineral powders or waxes.
  • the invention further relates to the use of olefin-acrylate copolymers for the production of films based on thermoplastic molding compositions of polyamide or polyester having improved chemical resistance to liquid casting resin impregnated glass fiber mats, characterized in that the copolymers measured a MFI value (MeIt Flow Index) at 190 0 C and a load of 2.16 kg of greater than 300 g / 10 min.
  • MFI value MeIt Flow Index
  • polyamide particularly preferably polyamide 6, polyamide 66 or polyester, preferably polybutylene terephthalate and olefin-acrylate copolymer.
  • the invention further relates to the use of olefin-acrylate copolymers having a MFI value (MeIt Flow Index) measured at 190 0 C and a load of 2.16 kg of greater than 300 g / 10 min, for the production of SMC release films on Basis thermoplastic molding compounds with polyamide or polyester.
  • MFI value MeIt Flow Index
  • the present invention relates to the use of SMC release films having improved chemical resistance to liquid casting resin impregnated glass fiber mats for covering styrene-containing casting resins or cast resin products.
  • the present invention relates to improving the chemical resistance of SMC release films to liquid cast resin impregnated glass fiber mats, wherein the liquid component is styrene. - -
  • the molding compositions to be used according to the invention are prepared by known processes by mixing the components in the polymer melt. The mixing of the components takes place in the corresponding proportions by weight. Preferably, the mixing (compounding) of the components at temperatures of 220 to 360 0 C by mixing together, mixing, kneading, extruding or rolling of the components, more preferably by compounding on a co-rotating twin-screw extruder or Buss kneader. It may be advantageous to premix individual components. It may also be advantageous, moldings or films made of a room temperature (preferably 0 to 40 0 C) physical mixture (dry blend) to prepare pre-mixed components and / or individual components directly.
  • the molding compositions prepared as described can be processed by extrusion, blow molding or injection molding.
  • the films to be produced according to the invention from the molding compositions can serve, for example, as release films for external covering or packaging of semifinished products of glass fiber mats impregnated with liquid casting resin or other unfinished cured resin products, as a lining for molds, molds, work surfaces and tools for processing styrene containing casting resins with or without glass fibers in the production of hollow bodies in shipbuilding, liquid tanks, corrugated sheets or prefabricated synthetic resin blocks for milling shaping, as well as aids in the transport, storage or processing of casting resins in the manufacture of household items, vessels, decorative moldings, buttons, handles, Knobs or in the processing of casting resins for embedding objects for illustrative purposes or for the preparation of microscopic photographs and other handling of casting resins.
  • plastic molding compounds were first prepared by compounding.
  • the individual components were mixed in a twin-screw extruder of the type ZSK 32 Compounder from Coperion Werner & Pfleiderer (Stuttgart, Germany) at temperatures between 260 and 290 0 C, discharged as a strand in a water bath, cooled to Granuliernote and granulated. After drying (usually two days at 70 0 C in a vacuum oven), the processing of the granules was carried out on a film extrusion line to monolayer films of 50 microns thickness. The resistance of the resulting films to styrene was determined by measuring the styrene permeability.
  • pieces of the film to be checked were tightly fastened in the 4000 mm 2 wall cutout of an otherwise tightly closable 50 ml metal vessel.
  • the vessel was filled with styrene (stabilized with tert-butyl pyrocatechol) so high that the foil piece in the cut-out window of the vessel wall was completely covered by the liquid.
  • the vessel was sealed and weighed for 48 hours to determine the amount of styrene pushed out through the film.
  • the weight loss of the entire experimental arrangement relative to the initial weight served as a measure of the permeation of styrene through the release film in the wall section of the metal vessel.
  • compositions were processed and tested as described above.
  • Examples 1 and 2 show that the styrene permeability of release films with polyamide or polyester content resulted from the improved chemical resistance and thus lower - -
  • Pore formation is significantly lower than in a conventional, purely polyethylene-based release film.
  • Thermoplastic e.g. Polyamide 6, linear, with a relative solution viscosity of a 1% solution in m-cresol of 3.9 or polybutylene terephthalate from Lanxess GmbH
  • Ethylene-acrylate copolymer e.g. Lotryl 37 EH 550 from Arkema S.A.

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

Abstract

La présente invention concerne des feuilles de matériaux thermoplastiques moulés à base de polyamide ou de polyester et un copolymère oléfine-acrylate avec une tenue supérieure au styrène et leurs utilisations comme feuilles de séparation pour le recouvrement de résines de coulée ou d'objets en résines de coulée contenant du styrène.
PCT/EP2009/064668 2008-11-07 2009-11-05 Feuilles avec une tenue élevée au styrène Ceased WO2010052262A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008056349A DE102008056349A1 (de) 2008-11-07 2008-11-07 Folien mit erhöhter Beständigkeit gegenüber Styrol
DE102008056349.8 2008-11-07

Publications (1)

Publication Number Publication Date
WO2010052262A1 true WO2010052262A1 (fr) 2010-05-14

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PCT/EP2009/064668 Ceased WO2010052262A1 (fr) 2008-11-07 2009-11-05 Feuilles avec une tenue élevée au styrène

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DE (1) DE102008056349A1 (fr)
WO (1) WO2010052262A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0990515A1 (fr) * 1998-09-30 2000-04-05 Elf Atochem S.A. Film comprenant une couche centrale en polyoléfine et deux couches externes en alliage polyamide/polyoléfine
US6087020A (en) * 1996-01-23 2000-07-11 Elf Atochem S.A. Film having low permeability to hydrocarbons
DE102005009200A1 (de) * 2005-02-25 2006-08-31 Lanxess Deutschland Gmbh Polyamid-Formmassen mit verbesserter Fließfähigkeit
US20060211810A1 (en) * 2004-06-08 2006-09-21 Peter Persigehl Molding compositions based on a thermoplastic polyester with improved flowability

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4444829A (en) 1979-10-10 1984-04-24 Allied Corporation Polyamide release film for sheet molding compound
GB2225582A (en) 1988-12-05 1990-06-06 Du Pont Canada Film of polyamide and grafted polyolefin

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6087020A (en) * 1996-01-23 2000-07-11 Elf Atochem S.A. Film having low permeability to hydrocarbons
EP0990515A1 (fr) * 1998-09-30 2000-04-05 Elf Atochem S.A. Film comprenant une couche centrale en polyoléfine et deux couches externes en alliage polyamide/polyoléfine
US20060211810A1 (en) * 2004-06-08 2006-09-21 Peter Persigehl Molding compositions based on a thermoplastic polyester with improved flowability
DE102005009200A1 (de) * 2005-02-25 2006-08-31 Lanxess Deutschland Gmbh Polyamid-Formmassen mit verbesserter Fließfähigkeit

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