WO2012031054A1 - Composition thermoplastique présentant une meilleure aptitude à l'écoulement à l'état fondu - Google Patents

Composition thermoplastique présentant une meilleure aptitude à l'écoulement à l'état fondu Download PDF

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WO2012031054A1
WO2012031054A1 PCT/US2011/050110 US2011050110W WO2012031054A1 WO 2012031054 A1 WO2012031054 A1 WO 2012031054A1 US 2011050110 W US2011050110 W US 2011050110W WO 2012031054 A1 WO2012031054 A1 WO 2012031054A1
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thermoplastic composition
core
modifier
rubber
hydroxymethyl
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PCT/US2011/050110
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English (en)
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Tengjiao Hu
Lei YING
Hua Jiao
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E. I. Du Pont De Nemours And Company
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Publication of WO2012031054A1 publication Critical patent/WO2012031054A1/fr

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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
    • C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
    • 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
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/05—Alcohols; Metal alcoholates
    • C08K5/053—Polyhydroxylic alcohols
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L51/08—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds
    • C08L51/085—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds on to polysiloxanes
    • 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
    • C08K5/00—Use of organic ingredients
    • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C08K5/005—Stabilisers against oxidation, heat, light, ozone
    • 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
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/06—Ethers; Acetals; Ketals; Ortho-esters
    • 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
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/10—Esters; Ether-esters
    • C08K5/101—Esters; Ether-esters of monocarboxylic acids
    • C08K5/103—Esters; Ether-esters of monocarboxylic acids with polyalcohols
    • 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
    • C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L51/04—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to rubbers
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons

Definitions

  • This invention relates to the field of polymeric compositions, particularly to certain thermoplastic polymeric compositions exhibiting improved melt flowability as well as good mechanical properties, methods of preparation and applications of said thermoplastic polymeric compositions.
  • Thermoplastic compositions containing polycarbonates (PC), polyesters, and elastomeric impact modifiers are known and available commercially.
  • the impact modifiers thus suitable include acrylonitrile-butadiene-styrene copolymer (ABS) or methylacrylate-butadiene-styrene copolymer (MBS).
  • a U.S. Patent, US5, 674,928 discloses a thermoplastic resin composition containing a polyester resin, a polycarbonate resin and a graft copolymer containing a rubbery substrate and a rigid superstrate.
  • MBS graft copolymers are among the disclosed graft copolymer.
  • JP2001-031860 discloses a composition containing polycarbonate, a mixture of polyethylene terephthalate (PET) and polybutylene terephthalate (PBT) and a graft elastomer having a core-shell structure.
  • the composition said to exhibit high impact strength, hydrolytic stability and chemical resistance.
  • polycarbonate polyalkylene terephthalate
  • impact modifier that contains a MBS core-shell polymer.
  • the composition said to exhibit improved surface quality and toughness at low temperature.
  • thermoplastic compositions also known as PC/polyester alloy
  • PC/polyester alloy are employed in making injection molded parts, films, blow-molded goods, pultruded sheets etc. These articles are used in automotive, electrical and electronic applications. The mechanical strength, electrical insulation and easy
  • EP0682057A1 describes the flow enhancement of polyamide and polyester compositions with retention of mechanical properties by using dendrimeric additives.
  • dendrimeric compounds in general are prepared in several separate steps from basic raw materials and are expensive.
  • EP 1041109 A2 describes the flow enhancement of glass fiber filled polyamide compositions by using a polyhydric alcohol having melting point between 150-280°C, for example, pentaerythritol or dipentaerythritol.
  • a polyhydric alcohol having melting point between 150-280°C for example, pentaerythritol or dipentaerythritol.
  • pentaerythritol and dipentaerythritol showed identical flow enhancing effects.
  • JP 10310690 discloses the use of 0.1-5% of pentaerythritol or l,l,l-tris(hydroxymethyl)ethane and 1,1,1- tri(hydroxymethyl)propane in a polybutylene terephthlate (PBT) for enhancing melt flow.
  • PBT polybutylene terephthlate
  • EP0272417 A2 describes a composition comprising aromatic polycarbonate and polyester and 0.01-5% of a polyol.
  • the polyol acts as anti-yellowing agent.
  • the effect of the polyol on other properties were not disclosed. Further, no impact modifier was mentioned in the disclosure as additive to the composition.
  • polyester compositions by using of 0.05-2% of a hydroxyl compound (for example, pentaerythritol and trishydroxymethyl aminoethane) comprising 0.1-25% of an acrylic impact modifier and about 0.1-50% of a reinforcing filler.
  • Said polyester may further comprise other thermoplastic including polycarbonate.
  • the present invention provides improved melt viscosity of thermoplastic polymer compositions without sacrificing mechanical properties.
  • thermoplastic composition comprising:
  • thermoplastic composition of the present invention is substantially free of reinforcing filler.
  • the aromatic polycarbonate is based on bisphenol A.
  • the aromatic polycarbonate has a melt mass flow rate of from about 5- 20 g per 10 min.
  • the polytrimethylene terephthalate has an intrinsic viscosity of about 0.8 to 1.2.
  • the impact modifier is a core-shell type copolymer comprising a shell of polymethyl methacrylate.
  • the rubber core of the impact modifier has a glass transition temperature from -80°C to -20°C.
  • the rubber core of the impact modifier is butadiene rubber or silicone rubber.
  • the melt flow modifier is a polyol selected from 2,2-dimethyl-l,3- propanediol, glycerol, l,l,l-tris(hydroxymethyl)ethane,
  • the melt flow modifier is l,l,l-tris(hydroxymethyl)ethane
  • thermoplastic composition of the present invention further comprises at least one additive selected from a group consisting of antioxidants, thermal stabilizers, ultraviolet light stabilizers, colorants including dyes and pigments, lubricants, hydrolysis resistants, demolding agents and flame retardants.
  • additives selected from a group consisting of antioxidants, thermal stabilizers, ultraviolet light stabilizers, colorants including dyes and pigments, lubricants, hydrolysis resistants, demolding agents and flame retardants.
  • This invention also directed to a molded article comprising or produced from the compositions disclosed above.
  • This invention is also directed to the use of the molded article as electric/electronic devices parts, automotive parts, machine parts, etc.
  • the term “produced from” is synonymous to “comprising”.
  • the terms “comprises,” “comprising,” “includes,” “including,” “has,” “having,” “contains” or “containing,” or any other variation thereof are intended to cover a non-exclusive inclusion.
  • a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.
  • “or” refers to an inclusive “or” and not to an exclusive “or”. For example, a condition A “or” B is satisfied by any one of the following: A is true (or present) and B is false (or not present), A is false (or not present) and B is true (or present), and both A and B are true (or present).
  • the term "substantially free of a component means that the amount of the component is not higher than 0.5%.
  • thermoplastic composition of the invention The invention is described in detail hereinunder. First mentioned are the components (a) to (d) constituting the thermoplastic composition of the invention.
  • the aromatic polycarbonates used in this thermoplastic composition are derived from diphenols and carbonate precursors in a solution method or in a melt method, such as those as produced through reaction of a diphenol and phosgene or through interesterification of a diphenol and a diphenyl carbonate.
  • 2,2-bis(4-hydroxyphenyl)propane i.e. bisphenol A
  • bis(4- hydroxyphenyl)methane 1,1 -bis (4-hydroxyphenyl)ethane, 2,2-bis(4-hydroxy- 3,5-dimethylphenyl)propane, 4,4'-dihydroxydiphenyl, bis(4- hydroxyphenyl)cycloalkanes, bis(4-hydroxyphenyl)oxide, bis(4- hydroxyphenyl)sulfide, bis(4-hydroxyphenyl)sulfone, bis(4-hydroxyphenyl) sulfoxide, bis(4-hydroxyphenyl)ether, bis(4-hydroxyphenyl)ketone, etc.
  • Other diphenols such as hydroquinone, resorcinol, catechol and the like are also usable in the invention. The diphenols mentioned herein may be used either singly or as combined.
  • the carbonate precursors for use in the invention include, for example, carbonyl halides, carbonyl esters, haloformates,, phosgene, diphenol
  • dihaloformates diphenyl carbonate, dimethyl carbonate, and diethyl carbonate.
  • Branched polycarbonates are prepared by adding a branching agent during polymerization.
  • branching agents are well known and may comprise polyfunctional groups organic compounds containing at least three functional groups which may be hydroxyl, carboxyl, carboxylic anhydride, haloformyl and mixtures thereof.
  • trimellitic acid trimellitic anhydride
  • trimellitic trichloride tris-p-hydroxy phenyl ethane
  • isatin-bis-phenol tris-phenol TC (l,3,5-tris((p-hydroxyphenyl)-isopropyl)benzene)
  • tris-phenol PA (4(4(1,1- bis(p-hydroxyphenyl)-ethyl)alpha, alpha-dimethyl benzyl)phenol
  • 4-chloroformyl phthalic anhydride trimesic acid and benzophenone tetracarboxylic acid.
  • the branching agent may be added at a level of about 0.05-2.0 weight percent.
  • Branching agents and procedures for making branched polycarbonates are described in U.S. Patent Nos. 3,635,895; 4,001,184; and 4,204,047.
  • polycarbonates may be branched polycarbonates or unbranched polycarbonates, copolymers thereof, and mixtures thereof.
  • the polycarbonate resin is a blend of two or more polycarbonate resins.
  • aromatic polycarbonates based on bisphenol A.
  • the aromatic polycarbonate has a melt mass flow rate of about 5-20 g per 10 min as measured at 300°C under a load of 1.2 Kg according to ISOl 133, preferably from about 8-12 g per 10 min .
  • Suitable types of polycarbonates can be selected from commercial brands such as MAKROLONTM from Bayer, LEXAN ® from S ABIC Innovative Plastics, PANLITE ® from Teijin, XANTAR ® from DSM, IUPILON ® from Mitsubishi, and CALIBER ® from Dow. The present list is indicative and not exhaustive.
  • the level of polycarbonate (a) employed in the thermoplastic composition of the present invention ranges from about 60 wt. % to about 85 wt. % of the total weight of the thermoplastic composition, preferably from about 65% to about 80% of the total weight of the thermoplastic composition, more preferably from about 68% to about 75% of the total weight of the thermoplastic composition.
  • Polytrimethylene terephthalate (PTT) serving as the component (b) of the present thermoplastic composition is a polyester.
  • Polyester polymers are well known to one skilled in the art and may include any condensation polymerization products derived from, by esterification or transesterification, an alcohol and a dicarboxylic acid including ester thereof.
  • Polytrimethylene terephthalate may be prepared by the condensation polymerization of 1,3-propanediol and terephthalic acid.
  • polytrimethylene terephthalate may also be prepared from 1,3-propanediol and dimethylterephthalate.
  • the 1,3-propanediol for use in making the PTT is preferably obtained biochemically from a renewable source ("biologically- derived" 1,3-propanediol).
  • polyesters and processes for making them are well known to one skilled in the art, further description is omitted herein for the interest of brevity.
  • Intrinsic viscosity is a measure of the molecular weight of a polymer and may be measured according to ASTM D4603-96. For example, a Viscotek Forced Flow Viscometer model Y-900 may be used. In the method, the polymers are dissolved in a phenol/tetrachloroethane (60/40 wt%) solution at a 0.5% (wt/vol) concentration and tested at 25°C. Intrinsic viscosity typically increases with increasing polymer molecular weight, but is also dependent on the type of macromolecule, its shape or conformation, and the solvent it is measured in.
  • the polytrimethylene terephthalate has an intrinsic viscosity of about 0.8 to 1.2.
  • polytrimethylene terephthalates include without limitation SORONA ® from DuPont and CORTERRA ® from Shell Chemicals.
  • thermoplastic composition of the present invention ranges from about 5% to about 30 % of the total weight of the thermoplastic composition, preferably from about 10% to about 25% of the total weight of the thermoplastic composition, more preferably from about 15% to about 20% of the total weight of the thermoplastic composition.
  • the component (c) to be added in the thermoplastic composition of the invention is an impact modifier.
  • the impact modifier may be at least one selected from the group consisting of an olefin copolymer, a core-shell graft copolymer and a mixture thereof.
  • Examples of the olefin copolymer that can be used in the present invention may include without limitation ethylene/propylene rubber, isoprene rubber, ethylene/octene rubber, ethylene -propylene-diene terpolymer (EPDM), and the like, and combinations thereof.
  • EPDM ethylene -propylene-diene terpolymer
  • the olefin copolymer may be grafted with about 0.1% to about 5% by weight of at least one reactive functional group selected from maleic anhydride, glycidylmethacrylate, oxazoline, and the like, and combinations thereof, to form a core-shell graft copolymer. Grafting the reactive functional group into the olefin copolymer can be readily practiced by a person having ordinary skill in the art to which the invention pertains.
  • Exemplary core-shell graft copolymers useful in the present invention can be prepared by polymerizing at least one rubber monomer, such as a diene rubber monomer, an acrylate rubber monomer, a silicone rubber monomer, or the like, or a combination thereof, to form a rubber polymer, and grafting the resulting rubber polymer with at least one monomer to be the shell, such as graftable styrene, a- methylstyrene, halogen- or alkyl (such as Ci-C 8 alkyl)-substituted styrene, acrylonitrile, methacrylonitrile, Ci-Cs methacrylic acid alkyl ester, Ci-Cs acrylic acid alkyl ester, maleic anhydride, an unsaturated compound such as C1-C4 alkyl or phenyl nucleus-substituted maleimide, or the like, or a combination thereof.
  • the content of the rubber can range from about 30% to about
  • the Ci-Cs methacrylic acid alkyl ester or the Ci-Cs acrylic acid alkyl ester is an ester of methacrylic acid or acrylic acid, and is prepared from monohydric alcohol containing 1 to 8 carbon atoms.
  • these esters may include without limitation methacrylic acid methyl ester, methacrylic acid ethyl ester, methacrylic acid propyl ester, and the like, and combinations thereof.
  • the impact modifier is a core-shell type copolymer comprising a shell of polymethyl methacrylate.
  • diene rubber may include without limitation butadiene rubber, acrylic rubber, ethylene/propylene rubber, styrene/butadiene rubber, acrylonitrile/butadiene rubber, isoprene rubber, ethylene-propylene-diene terpolymer (EPDM), and the like, and combinations thereof.
  • EPDM ethylene-propylene-diene terpolymer
  • the acrylate rubber may include an acrylate monomer such as but not limited to methyl acrylate, ethyl acrylate, n-propyl acrylate, n-butyl acrylate, 2- ethylhexyl acrylate, hexyl methacrylate, 2-ethylhexyl methacrylate, and the like, and combinations thereof.
  • an acrylate monomer such as but not limited to methyl acrylate, ethyl acrylate, n-propyl acrylate, n-butyl acrylate, 2- ethylhexyl acrylate, hexyl methacrylate, 2-ethylhexyl methacrylate, and the like, and combinations thereof.
  • Suitable curing agents used in preparing the copolymer may include without limitation ethylene glycol dimethacrylate, propylene glycol dimethacrylate, 1 ,3-butylene glycol dimethacrylate, 1 ,4-butylene glycol dimethacrylate, allyl methacrylate, triallyl cyanurate, and the like, and combinations thereof.
  • the silicone rubber can be prepared from cyclosiloxane.
  • cyclosiloxane may include without limitation hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane,
  • the silicone rubber can be prepared from at least one of the above-mentioned siloxane materials, using a curing agent.
  • suitable curing agents may include without limitation trimethoxymethylsilane, triethoxyphenylsilane, tetramethoxysilane, tetraethoxysilane, and the like, and combinations thereof.
  • the rubber core of the impact modifier is a butadiene rubber or a silicone rubber.
  • Suitable impact modifiers may be mixtures comprising core shell impact modifiers made via emulsion polymerization using alkyl acrylate, styrene and butadiene. These include, for example, methylmethacrylate-butadiene-styrene (MBS) and methylmethacrylate-butylacrylate core shell rubbers.
  • Especially preferred grafted polymers are the core-shell polymers available from Rohm & Haas under the trade name PARALOID ® , including, for example, PARALOID ® EXL3691 and PARALOID ® EXL3330, EXL3300 and EXL2300 as well as ClearStrength ® E920 from Arkema.
  • the impact modifiers can be of various particle sizes. The preferred range is from 50-800 nm, however larger particles, or mixtures of small and large particles, may also be used.
  • Preferred impact modifiers having a rubber core with a Tg (glass transition temperature) from -80°C to -20°C, preferably between about -60° to about -30°C, which comprise polyalkylacrylates or polyolefms grafted with
  • the rubber core of the impact modifier has a glass transition
  • a useful amount of impact modifier (c) is about 3% to about 15% of the total weight of the thermoplastic composition, preferably about 7% to about 11% of the total weight of the thermoplastic composition.
  • the content of the impact modifier When the content of the impact modifier is lower than about 3 weight percent, this may result in insignificant impact modifying effects of the thermoplastic composition. On the other hand, when the content of the impact modifier is higher than about 15 weight percent, this may result in deterioration of mechanical strength (such as tensile strength, flexural modulus, and the like) of the thermoplastic composition.
  • the component (d) to be in the thermoplastic composition of the invention is a melt flow modifier.
  • the melt flow modifier used in the thermoplastic composition of the present invention is a polyhydric alcohol (i.e. polyol).
  • melt flow modifier examples include polyols selected from 2,2-dimethyl-l,3- propanediol, glycerol, l,l,l-tris(hydroxymethyl)ethane,
  • 1,1,1 -tris(hydroxymethyl)propane 1,1,1 -tris(hydroxymethyl)propane, pentaerythritol, xylitol, sorbitol,
  • the melt flow modifier is a polyol selected from 2,2-dimethyl-l,3- propanediol, glycerol, l,l,l-tris(hydroxymethyl)ethane,
  • 1,1,1 -tris(hydroxymethyl)propane 1,1,1 -tris(hydroxymethyl)propane, pentaerythritol, xylitol, sorbitol,
  • the melt flow modifier is selected from
  • a useful amount of melt flow modifier is about 0.01-0.5 weight %>, preferably about 0.1-0.4 weight %>, wherein the weight percentages are based on the total weight of the thermoplastic composition.
  • the amount of the melt flow modifier is about 0.1 weight %, flow improvement can be observed with good mechanical properties of the thermoplastic composition.
  • the amount of the melt flow modifier exceeds 0.5 weight %, the mechanical properties of the thermoplastic composition are adversely affected.
  • thermoplastic composition of the present invention may further comprise optional additives commonly used and well known in the polymer art.
  • additives include without limitation antioxidants, thermal stabilizers, ultraviolet light stabilizers, colorants including dyes and pigments, lubricants, hydrolysis resistants, demolding agents, and flame retardants.
  • additive(s) may be present in the compositions in quantities that are generally from 0.01 to 15 weight %, preferably from 0.01 to 10 weight %, so long as they do not detract from the basic and novel characteristics of the thermoplastic composition and do not significantly adversely affect the performance of the thermoplastic
  • thermoplastic composition of the present invention is substantially free of reinforcing filler.
  • substantially free of reinforcing filler means that the amount of the reinforcing filler in the thermoplastic composition of the present invention is not higher than 0.5 wt% , preferably not higher than 0.1 wt% relative to the total weight of the thermoplastic composition.
  • thermoplastic composition of the invention may be formed by techniques known in the art.
  • the ingredients and optional additives are typically in powder or granular form, and extruded as a blend, and/or cutting into pellets or other suitable shapes.
  • the ingredients may be combined in any manner, e.g., by dry mixing or by mixing in the melted state in an extruder, or in other mixers.
  • one embodiment comprises melt blending the ingredients in powder or granular form, extruding the blend and comminuting into pellets or other suitable shapes.
  • dry mixing the ingredients followed by mixing in the melted state in an extruder.
  • Molded articles may be produced from a thermoplastic composition of the present invention disclosed above, by virtually any method of extrusion
  • thermoforming processing or thermoforming known to those skilled in this art.
  • a melt extrusion process such as injection molding, coinjection molding,
  • the articles may be injection molded, compression molded, profile extruded or the like.
  • a molded article comprising or produced from the compositions disclosed above.
  • thermoplastic composition of the present invention can be used for molding of various products and is particularly suitable for use in automotive parts, and for manufacturing electric and electronic appliances such as housings of TV sets, computers, mobile communication equipment and office automation equipment.
  • the present thermoplastic compositions can also be made into films and sheets.
  • Examples are illustrative and are not to be construed as to unduly limit the scope of the invention.
  • Examples of the invention are designated by Ex. 1-16 and the particularly desirable features of this invention may be seen by comparing the characteristics of Ex. 1 to 16 with the comparative examples A and B. The examples were all prepared and tested in a similar manner.
  • PC PANLITE L-1250 Y a bisphenol A-type aromatic polycarbonate having a melt mass flow rate of 8 g per 10 min at 300°C under a load of 1.2Kg, produced by Teijin Chemicals Ltd., Japan.
  • MBS a methacrylate-butadiene-styrene copolymer, an impact modifier having a core-shell structure, obtained from Arkema under Clearstrength ® E-920.
  • Pentaerythritol 2 2-bis(hydroxymethyl)- 1,3 -propanediol (CAS number 115-77-5), a polyhydric alcohol as a melt flow modifier purchased from SCRC (S3 ⁇ 4j).
  • Sorbitol D-Glucitol (CAS number 50-70-4), a polyhydric alcohol as a melt flow modifier purchased from SCRC (S3 ⁇ 4j).
  • PETS Pentaerythritol tetrastearate (CAS number 115-83-3), a mold releasing agent purchased from TCI under catalog number P0739.
  • IRGAFOS 168 a trisarylphosphite thermal stabilizer (CAS number 31570-04-4),
  • IRGANC r 1010 Tetrakis(methylene-3-(3,5-di-i-butyl-4- hydroxyphneyl)propionate)methane (CAS number 6683-19-8), a phenolic based antioxidant, obtained from Ciba Specialty Chemicals.
  • composition as pellets.
  • the temperature of the extruder was set to be
  • multipurpose test specimen has the basic shape of a tensile dog bone, 150 mm long, with the center section 10 mm wide by 4 mm thick by 80 mm long.
  • the flexural modulus (0.05%-0.25%) and the flexural stress at 3.5% strain were measured according to ISO 178:2001(E).
  • the mechanical properties, such as tensile stress at break, and tensile strain at break were measured according to ISO 527: 1993(E).
  • Izod impact (notched, type A) was measured on a Resil Impactor at room temperature according to ISO180:2000(E).
  • compositions of the examples and comparative examples as well as the evaluation results are shown in Tables 2, 3 and 4.
  • Pentaerythritol % 0 0.09 0.18 0.36 0.71
  • thermoplastic compositions respectively obtained by mixing 0.1, 0.2 and 0.4 parts (i.e. from 0.01 to 0.5
  • melt flow modifier i.e. pentaerythritol
  • an aromatic polycarbonate 20 parts of (b) a PTT and 10 parts of (c) an impact modifier are excellent in flowability and mechanical properties.
  • thermoplastic compositions of the present invention obtained by
  • melt flow modifier i.e. pentaerythritol
  • compositions of the present invention comprising 0.01- 0.5 weight% of a melt flow modifier, such as pentaerythritol (Ex.11),

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Abstract

L'invention concerne des compositions thermoplastiques qui comportent un polycarbonate, un polyester, un antichoc, un modificateur de viscosité à l'état fondu et, éventuellement, d'autres additifs. Un bon équilibre de l'aptitude à l'écoulement et des propriétés mécaniques est obtenu en régulant la quantité de modificateur de viscosité à l'état fondu. Les compositions et l'article moulé selon cette invention sont appropriés pour être utilisés en tant que pièces de dispositifs électriques/électroniques, pièces pour véhicules automobiles, pièces détachées de machines, etc.
PCT/US2011/050110 2010-09-01 2011-09-01 Composition thermoplastique présentant une meilleure aptitude à l'écoulement à l'état fondu WO2012031054A1 (fr)

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CN2010102763540A CN102382438A (zh) 2010-09-01 2010-09-01 具有改进的熔体流动性的热塑性组合物

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KR20160129658A (ko) * 2015-04-30 2016-11-09 삼성전자주식회사 고분자 조성물, 성형품 및 그 제조 방법

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CN103849122B (zh) * 2012-11-30 2016-12-21 杜邦公司 具有改进的熔体粘度的热塑性组合物
CN102964787B (zh) * 2012-12-20 2014-07-30 东莞市信诺橡塑工业有限公司 增韧改性聚对苯二甲酸丙二醇酯合金及其制备方法
CN110820070B (zh) * 2019-11-27 2022-04-12 扬州天富龙科技纤维有限公司 易染色的再生聚酯纤维的制造方法

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KR20160129658A (ko) * 2015-04-30 2016-11-09 삼성전자주식회사 고분자 조성물, 성형품 및 그 제조 방법
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