MXPA97008865A - Polycarbonate / acrylonitrile-butadiene-style mixtures - Google Patents

Abstract

The present invention involves blends of polycarbonate resin with a terpolymer resin grafted with rubber, one or more rigid, styrenic copolymers, wherein a small amount of a homopolymer or poly-alpha-olefin copolymer of 4 to 16 carbon atoms, aliphatic, or their functionalized derivatives, is included in the mix

Description

POLYCARBONATE / ACRYLONITRILE-BUTADIENQ-STYRENE MIXTURES BACKGROUND OF THE INVENTION FIELD OF L INVENTION The present invention relates to novel polymeric mixtures and, more particularly, refers to mixtures comprising one or more reams of polybranch, one or more acrylic-butadiene-styrene resins (flBS) grafted to a SAN polymer. and an effective amount of poly-alpha-olefin of 4 to 6 carbon atoms, to the phatic, a functionalized aliphatic poly-alpha-olefin polymer or a hydrogenated poly-alpha-olefin.

DESCRIPTION OF Lñ RELATED TECHNIQUE Polycarbonate reams are sturdy, rigid engineering thermoplastics that impart good impact resistance. However, they have poor flow characteristics, which sometimes cause processing difficulties. Various attempts have been made in the prior art to mix the polycarbonate resins with other polyrneric modifiers to solve that problem, while retaining the toughness and impact resistance of the polycarbonate resin. For example, acnlonitin-butadiene-styrene graft copolymers (ABS) have been blended with polycarbonate + or resins to produce a lower cost blend with improved processing characteristics. While good impact resistance is retained (see US Patent No. 3,130,177, issued to Grabowsl-'i, and Plastics World, November 1977, pages 56 to 58). These types of materials have been used widely in the automotive, electrical and electronic industries. Scientists in this field continue to look for new solutions to improve the processing capacity of polycarbonate / ABS blends, in order to make these materials suitable for automotive interior and exterior applications, and also in thin wall applications. As a result of recent studies by the General Electric Company, the inventors have unexpectedly found that by incorporating a small amount of an aliphatic pol olefin from 4 to 16 carbon atoms, specifically polybutene or an epoxy-functionalized polybutene, in the carbonate blends. / ABS, the processing capacity of the polycarbonate / PBS mixtures will be substantially improved, increasing the melting flow without losing the ductility at low temperature or the module.

BRIEF DESCRIPTION OF THE INVENTION In accordance with the present invention, a polypnepca blend is now provided comprising: (A) from 10 to 90 weight percent polycarbonate; (B) from 5 to 50 weight percent of a rubber-grafted resin; (Or from 5 to 70 weight percent of a styrene resin copolymer or terpolymer, and (D) from 0.1 to 8 weight percent of an aliphatic poly-alphaolef of 4 to 16 carbon atoms.

DETAILED DESCRIPTION OF THE INVENTION The polycarbonate reams employed in a useful manner according to the present invention are those which were previously known and which were described in the prior art. In general, the polycarbonate resins can be prepared from one or more multi-hydride compounds, free of thiogen, by reacting the multi-hydro compounds, such as a diphenol, with a carbonate precursor such as phosgene, a halogenofrhenium or a carbonate ester, such co or diphenyl carbonate or dirnetyl. The preferred diphenol is 2,2-b? S- (-h? Drox? Phen? L)? Ro? An (also referred to as bisphenol A). In general terms, said polycarbonate polymers can be typified because they have tpificados or recurrent units of the formulas - (- 0-A-0-C (= ü) -) n ---, where A is a divalent Aromatic radical of a dihydric phenol or a halogen or an alkyl-substituted phenol, both in the 3-position and in the 5-position, used in the polymer-producing reaction. Preferably the carbonate polymers used in this invention have an intrinsic viscosity (when in methylene chloride at? 5 ° C), which ranges from 0.30 to 1.00 deciliters / grarne. The dihydric phenols that can be used to provide said nuclear aromatic compounds contain two hydroxy radicals, each of which is directly attached to a carbon atom of the aromatic nucleus. Dihydric phenols typically include, but are not limited to: 2-b? S (4 ~ h? Drox? Phenyl) propane; hydroquinone; resorc ol; 2, 2-b? S (4-h? Dro? Phenyl) pentane; 2, '- (dihydroxy-enyl) ethane; bis- (2-hydroquinide) methane; bis- (4 ~ h? drox? feml) methane; 2, -dihydrox -phthalene, -b? S- (4-hydrox? Phen?) Sulphone; b? s- (3,5-d? et? l-4-h? drox? feni 1) ul phon; b? s- (3,5-d? met? ~ 4-h? drox? phen? 1) propane; b? s- (3,5-d? halogen-4-h? drox? phen?) propane; bi s- (3,5- ti i halogen- -hydrox ten i) s phon; 2, '- bi hi I? XI ten 11 f1 uo reindeer; 1, -b (- i rox fenn) cyclohexane; ether-, k '- di hi drox i di temí ico; ether, '-dihydro i-3, 3' -dihalogenodi phenyl; and ether 4,4 '-d? h? drox? -2, 5-d? h? drox? d? fen? lico Other dihydric phenols which are also suitable for use in the preparation of polycarbonates are described in US Pat. Nos. 2, 999, 035; 3,038,365; 3,334,154 and 4,131, 57. Also useful are the modified polycarbonates, such as those described in U.S. Patent Nos. 3,635,895 and 4,001,184. The aromatic carbonates can also be polymethylated with diols or diacids of 5 to 12 carbon atoms, aliphatic, linear or branched, or with polysiloxanes or with linear or aromatic polyesters, otherwise known as polyester-carbonates. . These polycarbonate reams can be prepared from these raw materials by any of several known methods, such as known interfacial, solution or melt processes. In general, polycarbonate resins are employed in amounts that maintain the desired physical properties of Compositions of resin mixtures, including their thermal resistance and their toughness. Typically, one or more polycarbonate resins are incorporated into the mixture of the present invention in amounts of about 10 to 90 weight percent, preferably 30 to 85 weight percent, better still, 60 to 75 weight percent. percent by weight and, most preferably, from 64 to 73 percent by weight. In cases where more than one polycarbonate ream is incorporated, the ratio of the first to second polycarbonate resins may vary from about 10 to 90 to 90 to 10 weight percent. The iPBS acplonitp lo-butad? Eno-est? Rene acrylic polyethylene terpolin of the present invention is well known in the art. ABS is a two-phase system, which is based on a continuous phase of styrene-acylomethyl copolymer (SAN) and a dispersed elastomep phase, which is typically based on butadiene rubber. Small amounts of styrene and aclonite are grafted onto the rubber particles to make the two phases compatible. Rigid styrene-acrylonitrile resin is typically incorporated in the mixture of the present invention in approximate amounts of 5 to 70 weight percent, preferably 10 to 50 weight percent, better still, 14 to 30 percent by weight. weight, with respect to the total weight of the rigid ream. Three main procedures can be used to prepare ABS, which include emulsion polymerization, bulk / in-mold and suspension polymerization, or combinations thereof. The emulsion polymerization of ABS is a two-step process involving the polymerization of butadiene to form a latex of I-ule, and then the addition and polymerization of acploni tplo and styrene during which the graft takes place. to the rubber and the production of the continuous phase of SAN .. The rubber content of the ABS graft, when made in emulsion, can vary from 10 to 90 pendente in weight; and the SAN is grafted from 10 to 90 weight percent with respect to the ABS graft composition. The ratio of styrene to acryliconitrile varies from 0:50 to 85:15. When carried out in emulsion, the rubber latex will have a particle size that varies from 0.15 to 0.8 microns in weight, preferably 0.3 microns. As regards the composition, the rubber phase may consist of polybutadiene, copolymers of es-rene-butadiene or butadiene-acrylonitrile, polyisoprene, EPM (ethylene / propylene rubbers), EPDP1 rubbers (ethylene rubbers / propylene / diene containing, as diene, a non-conjugated diene, such as hexadiene- (1,5) or norbornadiene, in small amounts), and interlaced alkyl acrylic esters, which are based on alkyl acrylates of L to 8 carbon atoms, in particular ethyl acrylate, butyl and ethylhexyl. One or more rubber-grafted reams, of about 10 to 90 and about 90 to 10 weight percent, may also be used. The latex emulsion is broken and the ABS is recovered at the end of the polymerization. In the bulk process, the styrene / acrylonitrile polymerization is carried out instead of in water. Instead of forming the rubber, a rubber previously produced in the rnonomepca solution dissolves. The rubber-monomer solution is then fed to the reactor (s) and the primary polymerization is carried out. When produced by a bulk or bulk-suspension process, the soluble rubber will vary from h to 2b percent by weight and the dispersed cellulose phase will have a diameter ranging from about 0.5 microns to 10 microns. A large percentage by weight of the SAN free phase is present, depending on the amount of rubber used. Instead of styrene and acrylorutrile monomers, used in grafted or rigid, free resins, styrene or aclonitrile can be replaced, or you can add them, such as styrene alfarnetii, para-styrene, mono , di-n-halogen styrene, alkyl methacrylates, alkyl acrylates, inalene anhydride, methacrylonitrile, rnaleirnide, N-alkyl-rnaleimide, N-ap-lrnaleimide or the N-apl-substituted alkyl or halogen-substituted N-apl. As the bulk process, the suspension polymerization uses rubber dissolved in the solution of rnonornero, but after polirnepzar SAN at low conversions, the mixture of rubber / SAN / rnonornero in water is suspended and the polymerization is completed. It is preferable to use high flux SANs in this invention. The high-flux SAN is SAN with a weight-average molecular weight ranging from about 30,000 to 75,000, preferably from about 45,000 to 72,000, better yet, from 50,000 to 66,000.; and most preferred, from 55,000 to 64,000, and a molecular weight / molecular weight polydispersity of weight of about 2-5. However, when bulk / bulk polymerization is used, ABS is used in the PC / ABS mixture, and the molecular weight distribution of the SAN can be higher with the polydispersity of molecular weight of nurner / molecular weight of weight = 2-8. The average molecular weight could vary from 72,000 to 130,000, where the number average molecular weight could vary from 15,000 to 42,000. In general, ABS is used in amounts of at least 5 weight percent of the total resin mixture, preferably from about 20 to 40 weight percent, and better still, from 25 to 38 weight percent. The aliphatic poly-alpha olefins of 4 to 16 carbon atoms, contemplated in this invention, are prepared by polymerizing one or more aliphatic alpha olefins of 4 to 16 carbon atoms, using the catalyst described in U.S. Patent Nos. 2,957,930; 3,997,129; 3,985,822; 4,431,570; 4,431,571 and 4,431,572, which are incorporated herein by reference. In general, the hydrocarbon feedstock for producing the alpha olefin can comprise 1-butene, t -rans-2-butene, c-2-butene, isobutylene, 2-rnet-11-propene, 1-pentene, 4- rnet? lpenteno-l, 1-hexene, 1-octene and 1-noneeno or mixtures of the above. The proportion of the alpha-olefms mentioned above, selected, can vary from 5 to 95 and from 95 to 5 weight percent, approximately. It can be incorporated as an ethylene and propylene feed material to approximately 20 percent by weight, with the poly-al tools of 4 to 6 carbon atoms. It is preferred that the hydrocarbon feedstock contains 10 weight percent isobutylene. The polybutylene polymers contemplated in this invention are polymers of 4 to 16 carbon atoms. The polybutylene polymers are prepared by polyenerizing a mixture of olefins of 4 to 6 carbon atoms, by methods that are well known in the art, to obtain an olefin polymer of 4 to 16 carbon atoms, with an average molecular weight scale. of about LOO to 5,000 grams / mole, as determined by gel permeation chromatography. In general terms, the polymerization reaction is a Friedel-Crafts reaction, which uses a catalyst such as aluminum chloride or boron fluoride, which is described extensively in the patent literature and in the technical literature. The hydrocarbon feedstock may be a refinery fraction, a pure monoolefin or a mixture of nitrogen-olefins. The rnono-olefma feed material, when the olefin contains from 3 to 16 carbon atoms, is preferred. If a pure olefin is used, which is gaseous or environmental conditions, it is necessary to control the reaction pressure or to dissolve the olefme in a solvent medium, inert to the reaction conditions, in order to maintain the olefme in the liquid phase. In the case of isobu i Leño, which is typical for mono-olefins, the material used in the polymerization process may be pure isobutylene or a hydrocarbon feedstock of 16 carbon atoms, mixed, such as result from the thermal or catalytic decay operation. This is a liquid when it is under pressure and, therefore, no diluent is needed. The polymerization temperature is selected based on the desired molecular weight in the product. As it is well known in the art, lower temperatures are used to obtain higher molecular weight products, while higher temperatures are used to obtain lighter products. The polymerization can be carried out in the full scale of temperatures generally associated with the conventional polymerization of polybutylene, that is, around 1Q0 ° C to 50 ° C. The resulting polymer of 4 to 16 carbon atoms typically includes various forms of butene, for example, isobutene, 1-butene, trans-2-butene, c-2-butene and may contain a small amount of propene and smaller amounts of polymerization by-products. For simplicity, the typical polymer is referred to herein as polybutene polymer. Typically, isobutene constitutes from about 80% to 95% of the total polybutene polymer. The polybutene polymer has at least one double bond per molecule. However, hydrogenated polybutene polymers, such as those described in U.S. Patent No. 5,177,277, are also useful in the present invention, b In general, polybutene is used in the PC / ABS / SAN formulation in amounts of at least about 0.1 to 8 weight percent, preferably about 0.2 to 5 weight percent, approximately, and even better still 0.4 to 3 weight percent; and what is preferred is about 0.5 to 2.5 percent by weight of the total composition. The epoxidized fine poly-alolees are disclosed in US Pat. No. 3,382,255, wherein the poly-alpha-olefin is dissolved in heptane or another suitable solvent and reacted with perfrnic, peracetic, perbenzoic, L5 pereftalic and others, at 40%. Other functionalized poly-alpha-olefins included as part of this invention include in rnaleic anhydride, rnaleinide, substituted N-alkyl substituted, N-aphenylnairimides or substituted N-substituted apolines. 0 Polybutene polymers are commercially available in a variety of grades from Arnoco Chemical Cornpany. Included within the present invention are polybutene polymers that are polyether, copolymer, saturated, hydrogenated, and functionalized polymers. Additionally, certain additives may be included in the ream composition of the present invention, such as antistatic agents, pigments, color, antioxidants, t-shirts, ultraviolet light absorbers, lubricants and other additives commonly used in the present invention. The polycarbonate / ARS blends. Suitable stabilizers which may optionally be incorporated into the resin mixture of the present invention include, but are not limited to, hindered phenolic antioxidants, eg, Irganox "1076, Irgafox® L6T, tosphites, for example, UítranoxR 626, UltranoxR 257 and the thioestres, for example, dilatinal ointment, etc. Suitable anaesthetic agents may optionally be incorporated in the resin mixture of the present invention, which include, but without limitation, the reaction products of the polymers of polyether oxide blocks filled with epichlorohydrin, polyurethanes, polyarynides, polyesters or polyether esteramides Suitable flame retardants are phosphorus compounds, most commonly phosphonates or phosphates such as those described in U.S. Patent No. 4,178,281, which may optionally be incorporated in the ream mixture of the present invention, for example, that kind of co Examples include, but are not limited to, RDP (resorcinol diphosphate), TPP (tphenyl phosphate), PTFE and halogenated materials, etc. Suitable fillers that can be optionally incorporated in the resin mixture of the present invention include, but are not limited to: talc, fiberglass, calcium carbonate, carbon fiber, clay silica, mica and conductive metals, etc. . Suitable mold floaters can be optionally incorporated into the ream mixture of the present invention and include, but are not limited to, PETS (pentaept ritrobotate terato) and liceryl monostearate.

DETAILED DESCRIPTION OF THE PREFERRED MODALITIES The invention is easily understood by reference to specific embodiments that are representative of the invention. However, it must be understood that specific modalities are given only with the purpose of illustration and it is understood that the invention can be put into practice in a manner other than that specifically illustrated and described here, without departing from its spirit or scope. . Mixtures containing the ingredients mentioned in Tables I, II and III (expressed as parts by weight) are prepared by mixing HensheL of the components for about 1 minute, and then adding the mixture to the extruder hopper. In a typical small-scale laboratory experiment, a co-rotating twin-screw extruder was used, which intermixed 10 barrels UP of 10 millimeters, to compose these inezcLas at 320-400 RPN, with a melting temperature of approx. 287 ° C. Injection molding Composite materials according to ASTH DL897 in a Toshiba ISEL70 injection molding machine, using a test mold with side gate, to two specimens for mechanical properties. The test specimens had a thickness of 3.2 ± 0.2 rnrn, unless otherwise specified. The ASTM test procedures were as follows: D256 Impact Izod slotted D3835 Viscosity of capillary fusion D638 Tensile strength, modulus and elongation D790 Modulus of flexion and resistance D3763 / GM9904P * Impact inultiaxial (Dynatup) * GM9904P refers to the materials of General Motors engineering standard and process plastics and procedures.

EXAMPLE 1 The ingredients used in this example are: PCI polycarbonate which has a weight average molecular weight of 47,000 to 53,000; PC2 polycarbonate which has an average weight of molecular weight of 33,000 to 38,000; ABS HRG 1 ABS with 50 ± 2% rubber content but adieno ABS HRG? ABS with 50 ±?% Rubber content of butadiene, lower molecular weight of graft SAN compared to ABS HRG 1; SAN 1 copolymer of ene-acrylonitrile having an average molecular weight of from or 90,000 to 102,000; SAN 2 styrene-acrylic copolymer that has a weight average weight of 55,000 to 67,000; IndopolRL-14 copolymer of butene, isobutylene and butene from Amoco, which has a molecular weight of 370; IndopolRH-100 copolymer of isobutylene polybutene and butene from Amoco, which has an average molecular weight of 940; Irgano? Rl076 3- (3,5-d? -ter-but? L-4-h? Drox? Phen?) Octadecyl propionate, from CIBA-GEIGY; PETS pentaerythritol tetrastearate. In this example, the improvement in ductility is demonstrated, especially at low temperature, while mixing a low molecular weight PC, by adding a small amount of the polybutene Indopol L-14 or polybutene Indopol H-100.

TABLE I Ingredient / mixture (Vq) 1 2 3 4 5 6 The results as follows: Viscosity in fuslon at 287 ° C 100 / sec 4795 2337 2780 3425 2982 2539 500 / sec 2710 1500 1750 1900 1850 1600 1000 / sec 1897 1156 1274 1425 1360 1185 1500 / sec 1490 963 1064 1167 1129 985 2500 / sec 1091 736 813 878 863 762 Ezod ranur-ado (l-g-rn / crn) RT 0.725 0.294 0.543 0.551 0.543 0.539 Standard deviation 0.045 0.028 0.005 0.016 0.025 0.017 -40 ° C 0.414 0.082 0.193 0.204 0.191 0.246 Deviation from nor to 0.102 0.022 0.007 0.018 0.014 0.091 Dynatup -30 ° C, disc 78. 17 rnm (3.35 rn / sec., 22.65 kg) Total Eng 54.51 46.08 52.89 53.71 54.33 52.65 (J) Deviation 2.98 8.83 3.29 3.17 3.41 3.72 standard Maximum Eng 51.63 43.86 50.58 51.54 51.36 49.11 (J) Deviation 2.85 7.85 2.95 2.96 2.84 2.34 as standard D / SD / B * 10/0/0 0/0/10 8/2/00 8/2/00 8/2/00 8/2/00 referred to as the ductile / semiductive 1 / tragile failure method, defined by the General Motors GM9904P engineering standard. The faults are visually classified based on multiaxial tests, using a mallet of 1.27 crn in diameter, on a span of 7.62 crn. The ductile failure exhibits a clean, bleached puncture of the test plate, without cracks radiating more than 10 millimeters away from the center of the impact point. Fragile failures exhibit complete shredding of the test plate, material flown from the plate, slots or cracks extending beyond the support ring. Semi-ductile failures fall within those specifications and can show bleached, uniform stress failures.

EXAMPLE 2 In this example it is shown by the use of high flux SAN, that the melt viscosity of the sample decreases significantly when sacrificing ductility, especially at low temperature. Using a small amount of polybutene Indopol L-14 or Indopol L-65, the Izod value was significantly increased at room temperature, the Izod impact at low temperature and, more importantly, the percentage of ductile or semiductile failure mode of the test. Dynatup. The same composition, molding and test procedure as in Example 1 was used. In this example, Indopol L-65 is a copolymer of polybutene, isobutylene and butene from Anoco, which has an average molecular weight of 435. TABLE II Ingredients / mixture (kg) 7 8 9 10 11 12 13 PC 1 29.44 31.25 31.25 31.25 31.25 31.25 31.25 31.25 31.25 ABS HR6 2 8.60 6.79 6.79 6.79 6.79 6.79 6.79 SAN 1 7.24 SAN 2 7.24 7.24 7.24 7.24 7.24 7.24 7.24 Irganox 1076 36.24 36.24 36.24 36.24 36.24 36.24 36.24 PETS (g) 67.29 67.29 67.29 67.29 67.29 67.29 67.29 pluteno L-14 226.5 453 679.5 906 (9) pButeno L-65 906 < g) Viscosity in fus: ion at 2 87 ° C 100 / sec 5601: 3264 3183 3304 3183 3183 3062 SOD / sec. 2950 1900 1880 1880 1B60 1830 1790 1000 / sec. 2040 1453 1417 1417 1392 1356 1347 1500 / sec. 1607 1210 117B 1175 1148 1137 1132 2500 / sec. 1163 928 874 901 889 871 871 Slotted Izod (kg -? / C?) RT Proiedio 0.733 0.781 0.766 0.837 0.008 0.736 0.812 Deviation 0.033 0.064 0.036 0.078 0.055 0.047 0.074 of nona Slotted Izod (kg-i / ci) -4fl "C Proidium 0.543 0.167 0.379 0.351 0.537 0.445 0.508 Besviar 0.035 0.033 0.090 0.133 0.079 0.077 0.080 nona Bynatup, -30 ° C, disc of 78.17 m (3.35 i / sec, 11.32 Kg) Crash deceleration 55.25 62.15 62.31 63.23 64.06 63.23 63.76 (j) Deviation 2.83 2.10 2.91 2.50 1.00 3.00 3.49 3.40 of wheel Eng. Laxi 51.21 58.11 58.03 58.87 59.91 59.15 58.42 (J) Deviation 2.79 2.49 3.69 2.65 3.33 3.95 5.20 wheel D / DP / B 10/0/0 2/6/02 6/4/00 6/4/00 6/4/00 7/3/00 6/4/00 Tensile strength (3.17 II, 22"C, 5.08 ci) Defonation 567.95 568.12 595.95 582.01 578.70 579.90 577.44 by traction I g / c? 2) Failure by 627.84 636.35 639.44 537.48 634.80 532.48 568.23 traction (kg / ci-?) Elongation 201 195 200 202 203 203 166 at resale (I) EXAMPLE 3 Vikopol® is a registered trademark of Elf Atochem North America for epoxyated polybutene. V? LOpoiR 24: a mixture of 95% copolymer of epoxylated 1-butene, 2-butene and 2-rnet? L-l-pro? N with 5% butene oleyol builders. Flash point 153 ° C. V? KopolR 63: a mixture of more than 95% copolymer of lime-butene epoxyl, 2-butene and 2-rnet? L-l-propene with 5% butene polyurene furnace. Flash point: 240 ° C.

TABLE III Average 0.08 0.189 0.196 Standard deviation 0.022 0.023 0.016 Dynatup -30"C, disc of 78.17 rnm (3.35 rn / sec, 22.65? -g) Total Eng (j) 46.08 52.30 53.87 Deviation from standard 8.03 3.59 4.76 Maximum Eng. (J) 43.86 50.3 51.55 Deviation from norm 7.85 3.25 4.81 D / SD / B * 0/0/10 2/8/0 2/8/0 As shown in the above table, an improvement in ductility can be obtained by adding a small amount of functionalized polytene, more specifically, epoxidized polybutene.

Claims (5)

? * > NOVELTY OF THE INVENTION CLAIMS

1. - A terrnoplastic composition, characterized in that it comprises: (A) from 10 to 90 weight percent of polycarbonate or; (B) from 5 to 50 percent by weight of terpolunero grafted with rubber; (C) from 5 to 70 weight percent of styrene resin; and (D) from one to eight percent by weight of an aliphatic alpha-olefin of 4 to 16 carbon atoms.

2. The oplo-plastic composition according to claim 1, further characterized in that it comprises 0.25 to 2.5 weight percent of an aliphatic poly-alpha-olefin of 4 to 16 carbon atoms.

3. The thermoplastic composition according to claim 1, further characterized in that the aliphatic poly-alpha-olefin of 4 to 16 carbon atoms is selected essentially from alpha-olefin, 1-butene, trans-2-butene, c-s-2. -butene, isobutylene, 2-rnet? ll-tolnene, 1-pentene, 4-rnet? lpenteno-1, 1-hexene, 1-octene and 1-nonene and their mixtures.

4. The thermoplastic composition according to claim 1, further characterized in that said composition additionally comprises ethylene.

5. The thermoplastic composition according to claim 1, further characterized in that the composition additionally comprises propylene. b.- The composition t er opl s Read in accordance with Claim L, further characterized in that said aliphatic poly-alpha olefin of 16 carbon atoms has an average molecular weight of about 100 to 5,000 grams / mol, when determined by gel permeation chromatography. 7.- The thermoplastic composition according to claim 1, further characterized in that the polycarbonate resin has a weight average molecular weight of about 18,000 to 57,000. 8. The thermoplastic composition according to claim 1, further characterized in that it additionally comprises at least one additional component selected from: mineral fillers, fibers, stabilizers, colorants, antistatic additives and lubricants. 9. A thermoplastic composition according to claim 1, further characterized in that it comprises: (A) from 10 to 90 weight percent of polycarbonate resin; (B) from 5 to 50 weight percent reams of rubber-grafted terpolymer; (C) from 5 to 70 weight percent of a styrene ream; and (D) from 0.1 to 8.0 weight percent of an aliphatic poly-alpha-olefin of 4 to 16 carbon atoms, functionalized. LO.- The thermoplastic composition according to claim 9, further characterized in that the aliphatic poly-aliphatic of 4 to 16 carbon atoms is functionalized with epoxy.