EP1664195A1 - Composition polymerique - Google Patents

Composition polymerique

Info

Publication number
EP1664195A1
EP1664195A1 EP03818816A EP03818816A EP1664195A1 EP 1664195 A1 EP1664195 A1 EP 1664195A1 EP 03818816 A EP03818816 A EP 03818816A EP 03818816 A EP03818816 A EP 03818816A EP 1664195 A1 EP1664195 A1 EP 1664195A1
Authority
EP
European Patent Office
Prior art keywords
polymer composition
parts
poly
weight
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.)
Withdrawn
Application number
EP03818816A
Other languages
German (de)
English (en)
Inventor
Udo Steffl
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.)
Rehau Automotive SE and Co KG
Original Assignee
Rehau AG and Co
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 Rehau AG and Co filed Critical Rehau AG and Co
Publication of EP1664195A1 publication Critical patent/EP1664195A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
    • C08L25/02—Homopolymers or copolymers of hydrocarbons
    • C08L25/04—Homopolymers or copolymers of styrene
    • C08L25/06—Polystyrene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
    • C08L25/02—Homopolymers or copolymers of hydrocarbons
    • C08L25/04—Homopolymers or copolymers of styrene
    • C08L25/08—Copolymers of styrene
    • C08L25/12—Copolymers of styrene with unsaturated nitriles
    • 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
    • C08L33/24—Homopolymers or copolymers of amides or imides
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L35/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical, and containing at least one other carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L35/06—Copolymers with vinyl aromatic monomers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers

Definitions

  • the present invention relates to a polymer composition and body trim parts made therefrom.
  • Such body trim parts are suitable, in the assembled state, to withstand the temperatures of approx. 200 ° C. which occur in the cathodic dip coating without deformation, and furthermore they are free of glass fiber additive in order to achieve a Class A surface.
  • body trim parts such as bumpers or fenders are usually made of metal.
  • plastics are increasingly being used.
  • Fiber-reinforced unsaturated polyesters and polyurethanes are used as thermosets.
  • the most common thermoplastics are - for cost reasons - elastomer-modified polypropylenes.
  • compositions based on various polyesters and polymer blends based on polyphenylene oxide and polyamide are used.
  • Body trim parts made of plastic can either be painted separately from the metal body (offline), or integrated into the body painting process. In the latter case, a distinction is made between the assembly of the plastic part before (online) or after the cathodic dip coating (inline). With online painting, temperatures in the range between 195 and 210 ° C occur, which require a corresponding heat resistance of the materials used.
  • the dimensional stability of materials in heat can be determined using various methods.
  • the dimensional stability HDT according to DIN 53461 is the temperature at which the bending test specimen, which is heated in a liquid heat transfer medium and is mounted on both sides, rises to a defined deflection under a certain centrally applied force.
  • the dimensional stability in heat according to Martens in accordance with DIN 53462 is characterized by the temperature which, under the action of force, has bent specimens heated in air at a specified heating rate by a specified amount.
  • the Vicat softening temperature according to DIN ISO 306 is the temperature at which a defined indenter penetrates 1 mm deep into the surface of a plastic test specimen under a force of 10 or 50N with a constant temperature rise.
  • the heat sag test has proven itself as a measure of the dimensional stability of a body trim part in the heat for a practical assessment.
  • a 4 mm thick tension rod according to ISO 3167, manufactured by injection molding according to DIN ISO 294, is clamped horizontally in a device and the deviation from the horizontal is determined in millimeters at a specified temperature after a specified duration.
  • Thermoplastic polymer compositions are made of, for example
  • US-A-3379792 known. It describes a polymer composition consisting of polyphenylene ether and polyamide, which shows improved flow properties compared to pure polyphenylene oxide.
  • the processability of such compositions, in particular by injection molding remains poor given the achievable MFR values of less than 10 g / min (280 ° C./5 kg).
  • the polymer compositions according to US Pat. No. 3,379,792 show a low level of stiffness and poor stability at temperatures above 180.degree.
  • surface problems in the form of ripple, unrest and markings occur, which entail time-consuming, costly reworking of the plastic parts.
  • Blend compositions based on syndiotactic polymers are known, for example, from WO 99/14273. It describes a composition which essentially consists of the following components: (a) a syndiotactic monovinylaromatic polymer; (b) a polyamide; (c) a compatibility agent for (a) and (b);
  • thermoplastic materials based on elastomer-modified polypropylene and polyester mixtures do not meet the temperature requirements for online paintable body trim parts by far, blends based on polyphenylene oxide and polyamide only inadequately. Furthermore, both fluidity and appearance are unsatisfactory in practice.
  • the object of the present invention is therefore to provide a polymer composition which can be used in the heat sag test at 250 ° C./30 min. a deviation of the horizontal on the test specimen is less than 15mm, which is suitable for the production of body parts that have a high surface quality, as well as good impact strength and a low thermal expansion with high rigidity and can be produced inexpensively.
  • the polymer composition of these body trim parts should have a high flowability in the melt.
  • a polymer composition comprising: (A) a polyamide (B) a syndiotactic monovinylaromatic homo- or copolymer (C) a polystyrene copolymer or polystyrene graft copolymer and (D) an impact modifier.
  • A a polyamide
  • B a syndiotactic monovinylaromatic homo- or copolymer
  • C a polystyrene copolymer or polystyrene graft copolymer
  • D an impact modifier
  • Component (A) of the polymer composition according to the invention is contained in 100 parts by weight in the polymer composition and is a thermoplastic polyamide, comprising as polyamide-forming monomers lactams such as, for. B. ⁇ - Caprolactam, Capryllactam, Laurinlactam and ⁇ nantlactam and mixtures of these monomers.
  • polyamide-forming monomers which can be used are dicarboxylic acids, such as alkanedicarboxylic acids having 6 to 12 carbon atoms, such as azelaic acid, pimelic acids, adipic acid, suberic acid, sebacic acid and terephthalic acid and isophthalic acid and diamines such as alkyldiamines having 4 to 12 alkyl groups, such as tetra-methylenediamine, hexamethylenediamine, hexamethylenediamine and hexamethylenediamine, or 2,2-bis (4-aminophenyl) propane, bis (4-aminocyclohexyl) methane, m-xylylenediamine or bis (4-aminophenyl) methane, and mixtures of diamines with dicarboxylic acids in any combination in relation to one another, such as hexamethylenediammonium adipate , Tetramethylene diammonium adiapate or he
  • the syndiotactic monovinyl aromatic homo- or copolymer (component B) can be a syndiotactic polystyrene homo- or copolymer, preferably with 80-100% syndiotactic diads, a number average molecular weight of 50,000 to 2,500,000 and a melting point of 160 to 310 ° C.
  • the proportion by weight of components (B), based on component (A), can be between 0.1 and 80 parts.
  • the polystyrene copolymer (C) can be a poly (styrene-co-acrylonitrile) -; Poly (styrene-co-methylvinyloxazoline) -; Poly (styrene-co-maleic anhydride) -; Poly (styrene-co-methyl-vinyloxazoline-co-acrylonitrile) or poly (styrene-co-maleimide) copolymer. Furthermore, the polystyrene copolymer (C) can be a mixture of two or more of the aforementioned polymers.
  • Component (C) can also be a polystyrene graft copolymer which has arisen from syndiotactic polystyrene by grafting maleic anhydride or itaconic anhydride or (meth) acrylic acid and its esters.
  • the proportion by weight of component (C), based on component A, can be between 0.1 and 50 parts.
  • Poly (styrene-co-maleimide) copolymers in which the. Maleic anhydride groups are only partially imidized and have a weight average molecular weight between 80,000 and 200,000.
  • the content of unreacted maleic anhydride groups in the poly (styrene-co-maleimide) copolymers can be between 0.1 and 10 mol% and the content of maleinimide groups can be between 0.1 and 50 mol%, the glass transition temperature is between 150 and 195 ° C.
  • Poly (styrene-co-maleimide) copolymers with a glass transition temperature of 195 ° C. are very particularly preferred.
  • Component (C) of the polymer composition according to the invention not only acts as a phase mediator for (A) and (B), but in particular also as a high-temperature modifier. This significantly improves the heat resistance behavior near or above 200 ° C.
  • the impact modifier (D) can be a natural rubber; polybutadiene; polyisoprene; Polyisobutylene; a copolymer of butadiene and / or isoprene with styrene and other comonomers, a hydrogenated copolymer and / or a copolymer which has been formed by grafting with maleic anhydride, itaconic anhydride, (meth) acrylic acid and their esters.
  • the impact modifier (D) can also be a graft rubber with a crosslinked elastomeric core, which consists of butadiene, isoprene or alkyl acrylates and has a graft shell made of polystyrene; a non-polar or polar olefin homo- and copolymer such as ethylene-propylene, ethylene-propylene-diene and Ethyle ⁇ -octene or ethylene-vinyl lacteate rubber or a non-polar or polar olefin homo- and copolymer, which by grafting with maleic anhydride, ithaconic anhydride, ( Meth) acrylic acid and its ester is formed.
  • a graft rubber with a crosslinked elastomeric core which consists of butadiene, isoprene or alkyl acrylates and has a graft shell made of polystyrene
  • the impact modifier (D) can also be a carboxylic acid-functionalized copolymer such as poly (ethene-co- (meth) acrylic acid) or poly (ethene-co-1-olefin-co- (meth) acrylic acid), the 1-olefin being a Alkene or an unsaturated (meth) acrylic acid ester with more than 4 atoms, including those copolymers in which the acid groups are partially neutralized with metal ions.
  • carboxylic acid-functionalized copolymer such as poly (ethene-co- (meth) acrylic acid) or poly (ethene-co-1-olefin-co- (meth) acrylic acid), the 1-olefin being a Alkene or an unsaturated (meth) acrylic acid ester with more than 4 atoms, including those copolymers in which the acid groups are partially neutralized with metal ions.
  • Copolymers which are formed by grafting with maleic anhydride and carboxylic acid-functionalized copolymers such as poly (ethene-co- (meth) acrylic acid) or poly (ethene-co-1-olefin-co- (meth) acrylic acid), in which the Acid groups partly with
  • the proportion by weight of components (D), based on component (A), can be between 0.1 and 50 parts.
  • the polymer composition of the body trim parts can optionally contain up to 200 parts by weight of additives, based on component (A), in the form of up to 5 parts by weight of lubricants or processing aids, up to 5 parts by weight of pigments, up to 2 parts by weight of nucleating agents and up to 1 part by weight of stabilizers , up to 2 parts by weight of blowing agent, up to 2 parts by weight of antistatic agent, up to 100 parts by weight of process oils, up to 100 parts by weight Parts by weight of fillers and / or flame retardants and up to 50 parts by weight of conductivity additives.
  • additives based on component (A)
  • component (A) in the form of up to 5 parts by weight of lubricants or processing aids, up to 5 parts by weight of pigments, up to 2 parts by weight of nucleating agents and up to 1 part by weight of stabilizers , up to 2 parts by weight of blowing agent, up to 2 parts by weight of antistatic agent, up to 100 parts by weight of process oils, up to
  • conductive additives to polymers or polymer compositions allows the polymer part to be painted in the electrostatic field; the electrostatically charged paint particles follow the electric field lines from the spray gun to the substrate to be painted. It is advantageous here that the paint is applied particularly evenly, that is to say “cloud formation” is avoided, and furthermore that the so-called paint top spray is considerably reduced. Since conductivity additives can significantly influence the mechanical properties of a polymer composition, their selection and the process technology chosen for their incorporation are crucial.
  • Preferred conductivity additives are carbon blacks, conductivity graphite, metal particles, carbon nanotubes, PAN carbon fibers, nickel-plated carbon fibers, recycled carbon fibers, metal-coated glass fibers or ceramic fibers (whiskers).
  • the conductive carbon black can be incorporated in pure powder / pearl form or via a conductive carbon black compound based on component (A).
  • magnesium hydroxide calcium carbonate, talc, wollastonite, silicas and silicates modified by cation or anion exchange with ionic layer charges, preferably slurried in oil or fat components application.
  • glass fibers can also be added.
  • the polymer composition of the body trim parts according to the invention can be prepared in a known manner by mixing and heating the individual components, preferably under the action of shear forces, in a processing unit getting produced. It can be processed using extrusion or injection molding processes to produce molded parts or semi-finished products.
  • the polymer composition according to the invention is preferably used in automobile construction for the production of body trim parts.
  • body trim parts include fenders, bumpers, side parts, fuel filler flap and / or outer door skins. They are preferably manufactured using the injection molding and / or internal gas pressure process.
  • the following examples illustrate, but are not limited to, the present invention.
  • compositions are given in parts by weight based on 100 parts by weight of component (A) and are in the following examples or comparative examples:
  • Styrene triblock copolymer MFR [g / 10min] 22 at 230 ° C / 5kg; Styrene / EB ratio
  • thermoplastic mixture In a twin-screw extruder with a metering device for granules, granular syndiotactic polystyrene [3], polyamide [7], impact modifier [6], oil-extended ethylene-octene copolymer and fumaric acid-grafted PPO are metered in at temperatures above 270 ° C. The mixture is melted, extruded and cut. The resulting thermoplastic mixture has the properties given in the table.
  • Example 1 In a twin-screw extruder with a metering device for granules, granular syndiotactic polystyrene [3], polystyrene copolymer [4], polyamide [1] and impact modifier [5] are metered in at temperatures above 270 ° C. The mixture is melted, extruded in a strand and cut. The resulting thermoplastic mixture has the properties given in the table.
  • Example 2 In a twin-screw extruder with a metering device for granules, granular syndiotactic polystyrene [3], polystyrene copolymer [4], polyamide [1] and impact modifier [6] are metered in at temperatures above 270 ° C. The mixture is melted, extruded in a strand and cut. The resulting thermoplastic mixture has the properties given in the table.
  • thermoplastic mixture In a twin-screw extruder with a metering device for granules, granular syndiotactic polystyrene [3], polystyrene copolymer [4], polyamide [2J and impact modifier [5] are metered in at temperatures above 295 ° C. The mixture is melted, extruded in a strand and cut. The resulting thermoplastic mixture has the properties given in the table.
  • thermoplastic mixture In a twin-screw extruder with a metering device for granules, granular syndiotactic polystyrene [3], polystyrene copolymer [4], polyamide [2] and impact modifier [6] are metered in at temperatures above 295 ° C. The mixture is melted, extruded in a strand and cut. The resulting thermoplastic mixture has the properties given in the table.
  • Table 1 shows the mechanical properties of the compositions according to the invention, Table 2 the mechanical properties according to Comparative Examples 1-3. Table 1

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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)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention concerne une composition polymérique convenant à la production d'éléments de revêtement de carrosserie et présentant un fléchissement inférieur à 15 mm lors du test de fléchissement à chaud effectué à 250 DEG C pendant une durée de 30 minutes. La composition polymérique selon l'invention contient un polyamide, un homopolymère ou un copolymère monovinylaromatique syndiotactique, un copolymère à base de polystyrène ou un copolymère greffé à base de polystyrène, ainsi qu'un modificateur de la résistance aux chocs.
EP03818816A 2003-09-13 2003-09-13 Composition polymerique Withdrawn EP1664195A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2003/010201 WO2005033206A1 (fr) 2003-09-13 2003-09-13 Composition polymerique

Publications (1)

Publication Number Publication Date
EP1664195A1 true EP1664195A1 (fr) 2006-06-07

Family

ID=34400427

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03818816A Withdrawn EP1664195A1 (fr) 2003-09-13 2003-09-13 Composition polymerique

Country Status (4)

Country Link
US (1) US20060281871A1 (fr)
EP (1) EP1664195A1 (fr)
AU (1) AU2003275963A1 (fr)
WO (1) WO2005033206A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009034153A1 (fr) * 2007-09-12 2009-03-19 Basf Se Procédé de dosage de superabsorbants
US20110207838A1 (en) * 2010-02-25 2011-08-25 E.I. Du Pont De Nemours And Company Recycled thermoplastic with toughener
EP2655507A1 (fr) * 2010-12-20 2013-10-30 Basf Se Matières moulables thermoplastiques à base de copolymères de styrène et de polyamides présentant une meilleure ténacité à basse température
CN103987783B (zh) * 2011-08-22 2016-03-16 纳幕尔杜邦公司 回收热塑性塑料与增韧剂
WO2016186142A1 (fr) * 2015-05-19 2016-11-24 デンカ株式会社 Copolymère destiné à être utilisé en tant qu'agent de compatibilité de mélange polymère, et composition de résine
CN113444326A (zh) * 2021-07-22 2021-09-28 广东粤化新材料技术开发有限公司 一种高韧性聚苯乙烯树脂及其制备方法

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Publication number Priority date Publication date Assignee Title
US3379792A (en) 1965-08-12 1968-04-23 Gen Electric Polymer blend of a polyphenylene oxide and a polyamide
JPS62187708A (ja) * 1985-11-11 1987-08-17 Idemitsu Kosan Co Ltd スチレン系重合体の製造法
JPH0628897B2 (ja) * 1986-06-30 1994-04-20 東燃化学株式会社 自動車用バンパ−の製造方法
JP3139516B2 (ja) * 1992-10-08 2001-03-05 出光興産株式会社 熱可塑性樹脂組成物
US5569516A (en) * 1995-03-03 1996-10-29 Union Carbide Chem Plastic Membrane and mixture comprising a thermoplastic elastomer
JPH08319385A (ja) * 1995-05-26 1996-12-03 Idemitsu Petrochem Co Ltd ポリスチレン系樹脂組成物及びその成形品
BE1009904A3 (nl) 1995-12-29 1997-10-07 Dsm Nv Rubber gemodificeerde polyamide polymeersamenstelling.
CA2301701A1 (fr) 1997-09-12 1999-03-25 John M. Warakomski Melanges de polymeres durcis
KR100367342B1 (ko) * 2000-01-20 2003-01-10 삼성전자 주식회사 내충격성 향상을 위한 마크로모노머를 포함하는신디오탁틱 스티렌계 공중합체 수지 조성물
US20040110890A1 (en) * 2002-08-28 2004-06-10 Claire Brissot Polyester compositions for appearance parts

Non-Patent Citations (1)

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Title
See references of WO2005033206A1 *

Also Published As

Publication number Publication date
AU2003275963A1 (en) 2005-04-21
US20060281871A1 (en) 2006-12-14
WO2005033206A1 (fr) 2005-04-14

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