JPH0136858B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises (A) 95 to 50 parts by weight of a thermoplastic, aromatic polycarbonate having a weight average molecular weight w (w measured by light scattering method) of between 10,000 and 200,000;
(B) Thermoplastic polyalkylene terephthalate - 50~
5 parts by weight, and if appropriate (C) 0 to 30, preferably 1 to 20, especially 3 to 15 parts by weight of an elastic polymer having a glass transition temperature below -20°C, in each case ( In a thermoplastic molding composition in which the sum of parts by weight of A) + (B) + (C) is 100 parts by weight, the polycarbonate component (A) is 1 to 20 parts by weight based on the sum of (A) + (D). Thermoplastic molding compositions, characterized in that they contain % by weight, preferably from 1 to 16% by weight, in particular from 2 to 10% by weight, of a thermoplastic polymer (D) based on polyetherimide. be. Components (A) to (D) Component (A) Regarding the present invention, the aromatic polycarbonate (A) is
For example, known polycarbonates, copolycarbonates and mixtures of these polycarbonates based on at least one of the following diphenols are understood: hydroquinone, resorcinol, dihydroxydiphenyl, bis-(hydroxyphenyl) _-C1 - _C8- Alkane, bis-(hydroxyphenyl) _-C5 - _C6 -cycloalkane,
Bis-(hydroxyphenyl) sulfide, bis-(hydroxyphenyl) ether, bis-(hydroxyphenyl) ketone, bis-(hydroxyphenyl) sulfoxide, bis-(hydroxyphenyl) sulfone and α,α′- Bis(hydroxyphenyl)-diisopropylbenzene. These and other suitable diphenols are disclosed, for example, in U.S. Pat.
It is described in No. 3148172, No. 3062781, No. 2991273, and No. 2999846. Examples of suitable diphenols include 4,4'-dihydroxydiphenol, 2,4-bis-(4-hydroxyphenyl)-2-methylbutane, α,α'-bis-(4-hydroxyphenyl)-p -diisopropylbenzene, bis-(4-hydroxyphenyl) ether, bis-(4-hydroxyphenyl) sulfone and bis-(4-hydroxyphenyl) ketone. Examples of particularly suitable diphenols include: 2,2-bis-(4-hydroxyphenyl)
-propane, bis-(hydroxyphenyl)-methane, bis-(4-hydroxyphenyl) sulfone and 1,1-bis-(4-hydroxyphenyl)-cyclohexane. Aromatic polycarbonate (A) is used in a small amount, preferably
Branching by incorporating 0.05 to 2.00 mol % (based on the diphenol used) of trifunctional or more than trifunctional compounds, such as those having 3 or more than 3 phenolic hydroxyl groups. Can be done. Aromatic polycarbonate (A) is generally 10,000~
It should have an average molecular weight w determined by light scattering of 200,000, preferably 20,000 to 80,000. For example, a small amount of low molecular weight polycarbonate having an average of 2 to 20 condensations can be added to
It can be mixed into high molecular weight polycarbonates with a w of 200,000. Chain terminators, such as phenols, halogenophenols or alkylphenols, are used in known manner and in calculated amounts to adjust the molecular weight w of the polycarbonate (A). The polycarbonate (A) used according to the present invention can be prepared by a phase boundary process in a known manner.
or by a method in homogeneous solution (pyridine method) or, if appropriate, by a melt transesterification method. Component (B) Polyalkylene terephthalate related to the present invention
(B) is a reactive product of an aromatic dicarboxylic acid or its reactive derivative (for example dimethyl ester) and an aliphatic, cycloaliphatic or araliphatic diol, as well as mixtures of these reactive products. Suitable polyalkylene terephthalates (B) can be prepared by known methods from terephthalic acid (or its reactive derivatives, e.g. dimethyl terephthalate) and aliphatic or cycloaliphatic diols having 2 to 10 carbon atoms. [Kunststoff-
Handbuch (Plastics Handbook), Volume 695
Pages below, Carl Hanser Verlog Munich 1973]. Suitable polyalkylene terephthalates (B) contain at least 80 mol %, preferably at least 90 mol %, of terephthalic acid groups, based on the dicarboxylic acid component, and at least 80 mol %, preferably at least 90 mol %, based on the diol component. Ethylene glycol group and/or butane-1,4
-Contains diol groups. Suitable polyalkylene terephthalates (B) include terephthalic acid plus up to 20 mol % of other aromatic or cycloaliphatic dicarboxylic acids having 8 to 14 carbon atoms or aliphatic dicarboxylic acids having 4 to 12 carbon atoms. Acid groups, such as phthalic acid, isophthalic acid, naphthalene-2,6-dicarboxylic acid, 4,4
- may include diphenyldicarboxylic acid, succinic acid, adipic acid, sebacic acid, azelaic acid or cyclohexanediacetic acid. Suitable polyalkylene terephthalates (B) contain, in addition to ethanediol or butanediol groups,
up to 20 mol % of other aliphatic diols having 3 to 12 carbon atoms or cycloaliphatic diols having 6 to 21 carbon atoms, such as propane-1,3-diol, 2-ethyl-propane-1, 3-diol, neopentyl glycol, pentane-1,5
-diol, hexane-1,6-diol, cyclohexane-1,4-dimethanol, 3-methylpentane-2,4-diol, 2-methylpentane-2,4-diol, 2,2,4-trimethylpentane -1,3- or 1,6-diol, 2
-Ethylhexane-1,3-diol, 2,2-
Diethylpropane-1,3-diol, hexane-2,5-diol, 1,4-di-(β-hydroxyethoxy)-benzene, 2,2-bis-(4
-Hydroxycyclohexane)-propane, 2,
4-dihydroxy-1,1,3,3-tetramethylcyclobutane, 2,2-bis-(3-β-hydroxy-ethoxyphenyl)-propane and 2,
2-bis-(4-hydroxypropoxy-phenyl)-propane [DE-OS] No. 2407674;
No. 2407776 and No. 2715932]. Polyalkylene terephthalate (B) can be used, for example, in German patent application no. 1900270 and US patent application no.
Branching can be effected by the incorporation of relatively small amounts of trihydric or tetrahydric alcohols or tribasic or tetrabasic carboxylic acids as described in No. 3,692,744. Examples of suitable branching agents are trimesic acid, trimellitic acid, trimethylolethane or -propane and pentaerythritol. It is recommended to use less than 1 mol % of branching agent based on the acid component. Particularly suitable polyalkylene terephthalates (B) are those prepared solely from terephthalic acid or its reactive derivatives (for example its dialkyl esters) and ethylene glycol and/or butane-1,4-diol, and polyalkylene terephthalates thereof. It is a mixture of terephthalates. Other suitable polyalkylene terephthalates (B) include copolyesters prepared from at least two of the above-mentioned acid components and/or at least two of the above-mentioned alcohol components; particularly suitable copolyesters are poly(ethylene glycol) /butane-
1,4-diol) terephthalate. The polyalkylene terephthalates preferably used as component (B) are generally phenol/
0.4 to 1.5 dl/g, preferably 0.5 to 1.5 dl/g when measured in o-dichlorobenzene (1:1 parts by weight)
It has an intrinsic viscosity of 1.3 dl/g, in particular 0.6 to 1.2 dl/g. Component (C) Elastic polymers (C) which can be used according to the invention include copolymers, in particular graft copolymers, which have a glass transition temperature below -20°C, and Obtainable essentially from at least two of the following monomers: chloroprene, butadiene, isoprene, isobutene, styrene, acrylonitrile, ethylene, propylene, vinyl acetate and (meth)acrylates having carbon atoms in the alcohol component; For example, “Methoden der
``Methods of Organic Chemie'' (``Methods of Organic Chemie'')
(Houben-Weyl), Volume 14/1,
Georg Thieme Verlag Stuttgart 1961, 393~
p. 406, and C.B. Bucknall, “Toughened
Plastics”, Appl.Science Publishers, London
1977. Suitable polymers (C) have a gel content of greater than 20% by weight, preferably greater than 40% by weight. A preferred polymer (C) contains 15 to 45% by weight of vinyl acetate groups;
Non-flowable to 1000, preferably 0.1 when measured at 190°C under a load of 2.16kp according to DIN53,735
Ethylene with a melt index of ~20/
It is a vinyl acetate copolymer. Examples of suitable polymers (C) include so-called EPM and
EPDM, in which the weight ratio of ethylene groups to propylene groups is in the range 40:60 to 65:35. Mooney viscosity (ML1+4/100℃) of non-crosslinked EPM or EPDM rubber is 25
Between 100 and 100, preferably between 35 and 90. The gel content of non-crosslinked EPM or EPDM rubber is less than 1% by weight. Ethylene/propylene copolymer (EPM) used
has virtually no double bonds, whereas ethylene/propylene/diene terpolymer (EPDM)
may have 1 to 20 double bonds/1000 carbon atoms. Examples which may be mentioned of suitable diene monomers in EPDM include: conjugated dienes such as isopropylene and butadiene, and carbon atoms 5
-25 non-conjugated dienes such as 1,4-pentadiene, 1,4-hexadiene, 1,5-hexadiene, 2,5-dimethyl-1,5-hexadiene and 1,4-octadiene; cyclic dienes such as cyclo Pentadiene, cyclohexadiene, cyclooctadiene and dicyclopentadiene; alkenylnorbornenes such as 5-ethyldiene-
2-norbornene, 5-butyldiene-2-norbornene, 2-methallyl-5-norbornene and 2-isopropenyl-5-norbornene, and tricyclodienes such as 3-methyl-tricyclo-(5,2,1,0,2 ,6)-3,8-decadiene. Suitable examples include the nonconjugated dienes hexadiene-1,5-ethylidene-norbornene and dicyclopentadiene. The diene content in EPDM is preferably between 0.5 and 10% by weight. Such EPM and EPDM rubbers are described, for example, in DE-A-2808709. Other suitable polymers (C) are selectively hydrogenated block copolymers of vinyl aromatic monomers (X) and conjugated dienes of the X--Y type (Y). These block copolymers can be produced by known methods. Generally, suitable X-
used in the production of styrene/diene block copolymers to prepare Y block copolymers;
and ``Encyclopedia of Polymer Science.
and Technology”, Volume 15, Interscience, NY.
(1971), pp. 508 et seq. can be applied. Selective hydrogenation can be carried out by routes known per se and essentially completely hydrogenates the ethylenic double bonds, leaving the aromatic double bonds essentially unaffected. means. Such selectively hydrogenated block copolymers are described, for example, in German patent application no.
Described in No. 3000282. Examples of suitable polymers (C) include styrene and/or acrylonitrile and/or alkyl(meth)
Polybutadiene, butadiene/styrene copolymers and poly-
(Meth)-acrylates, for example also copolymers of styrene or alkylstyrene and conjugated dienes (high-impact polystyrene), i.e. copolymers of the type described in German Patent Application No. 1,694,173 (=US Pat. No. 3,564,077). Examples of other suitable graft polymers (C) are polybutadiene grafted with acrylates or methacrylates, vinyl acetate, acrylonitrile, styrene or alkylstyrene, butadiene/styrene copolymers, butadiene acrylonitrile copolymers , polyisobutene or polyisopropene, as described, for example, in DE-A 2348377 (=US Pat. No. 3,919,353). Examples of particularly suitable polymers (C) are ABS polymers, such as those described in German Patent Application No. 2035390 (=US Pat. No. 3,644,574) or German Patent Application No. 2248242 (=UK Patent No. No. 1409275). Examples of particularly suitable polymers (C) include 10 to 40% by weight, preferably 10 to 35 and especially 15 to 25% by weight, based on the grafted product, of at least one (meth)acrylic acid and/or 10-35 based on the mixture
% by weight, preferably from 20 to 35% by weight of acrylonitrile and from 65 to 90% by weight, preferably from 65 to 80% by weight based on the mixture, of a styrene mixture as a grafting base of at least 70%
60-90% by weight, based on the grafted product, with % by weight of butadiene groups, preferably 65-90,
In particular, graft polymers obtained by grafting onto 75-85% by weight butadiene polymers, in which the gel content of the graft base is preferably 70% (measured in toluene) and the graft polymers are The degree of chemical conversion G is 0.15 to 0.55, and the average particle diameter _d50 of the graft polymer (C) is 0.2 to 0.55.
It is 0.6 μm, preferably 0.3 to 0.5 μm. (Meth)acrylates are esters of acrylic or methacrylic acid and monohydric alcohols having 1 to 8 carbon atoms. In addition to the butadiene group, the graft base contains
based on up to 30% by weight of groups of other ethylenically unsaturated monomers, such as styrene, acrylonitrile or esters of acrylic or methacrylic acid having 1 to 4 carbon atoms in the alcohol component (e.g. methyl acrylate, ethyl acrylate, methyl methacrylate and ethyl methacrylate). A preferred grafting base consists of pure polybutadiene. As is known, the graft monomer is not completely grafted onto the graft base in the grafting reaction, so that the graft polymer (C) used according to the invention contains, in addition to the actual grafted polymer, a homogeneous polymer and a , if appropriate also contains copolymers of grafting monomers used for grafting. The degree of grafting G represents the weight ratio of grafted monomer to graft base and is dimensionless. The average particle size d ₅₀ is the diameter at which 50% of the particles are larger than and 50% of the particles are smaller than it. This was carried out by ultracentrifugation measurement [W.Scholtan, H.Lange, Kolloid.Z.
und Z. Polymere 250 (1972), 782-796] or by electron microscopy and subsequent particle counting [G.
Ka¨mpf, H. Schuster, Angew.
Makromolekulare Chemie 14, (1970), 111~
[129] or by light scattering measurements. Examples of other particularly suitable polymers (C) include (a) as a graft base, having a glass transition temperature of -20°C or less;
A graft polymer of (c) 25 to 98% by weight of acrylate rubber, based on the graft polymer, and (b) 2 to 75% by weight, based on the graft polymer, of at least one polymerizable ethylenically unsaturated monomer. There is,
The homopolymer will form in the absence of (a), or the copolymer will have a glass transition temperature of 20° C. or higher as a graft monomer. The acrylate rubber of polymer (C) is preferably a polymer of alkyl acrylate, if appropriate with up to 40% by weight of other polymerizable ethylenically unsaturated monomers. If the acrylate rubber (as described below) which is also used as graft base (a) is a graft product that already has a diene rubber core, the diene rubber core is not taken into account when calculating this percentage. Suitable polymerizable acrylates include _C1 - _C8 -alkyl esters such as methyl, ethyl, butyl, octyl and 2-ethylhexyl esters; halogenoalkyl esters, preferably halogeno- _C1 - _C8 -alkyl esters such as chloroethyl acrylate. , and aromatic esters such as benzyl acrylate and phenethyl acrylate. These can be used individually or as a mixture. The acrylic rubber (a) can be non-crosslinked or crosslinked, and is preferably partially crosslinked. Monomers having more than one polymerizable double bond can be copolymerized to achieve cross-linking. Suitable examples of cross-linking monomers include unsaturated monocarboxylic acids having 3 to 8 carbon atoms and unsaturated monohydric alcohols having 3 to 12 carbon atoms or 2 to 4 OH groups and 2 carbon atoms. Esters of saturated polyols with ~20 esters, such as ethylene glycol dimethacrylate or allyl methacrylate; and also polyunsaturated heterocyclic compounds, such as trivinyl and triallyl cyanuric acid and isocyanurates and tris-acryloyl-s
-triazines, and polyfunctional vinyl compounds, such as di- and tri-vinylbenzene; and also triallyl and diallyl phosphates. Suitable cross-linking monomers include allyl methacrylate, ethylene glycol dimethacrylate, diallyl phthalate, and heterocyclic compounds containing at least three ethylenically unsaturated groups. Particularly suitable cross-linking monomers include the cyclic monomers triallyl cyanurate, triallyl isocyanurate, trivinyl cyanurate, triacryloylhexahydro-s-triazine and triallylbenzene. The amount of cross-linking monomer is preferably from 0.02 to 5% by weight, in particular from 0.05 to 5% by weight, based on the graft base (a).
It is 2% by weight. In the case of cyclic crosslinking monomers having at least three ethylenically unsaturated groups, it is advantageous to limit their amount to 1% by weight of the graft base (a). In addition to acrylates, suitable "other" polymerizable ethylenically unsaturated monomers which may be used, if appropriate, for the preparation of graft base (a) include, for example, acrylonitrile, styrene, alpha-methylstyrene, acrylamide and vinyl -C ₁ -C ₆ -alkyl ether. Acrylate rubbers suitable as graft base (a) include emulsion polymers with a gel content of 60% by weight. The gel content of the graft base (a) is determined in dimethylformamide at 25°C [M.
Hoffmann, H. Kr¨omer and R. Kuhn,
Polymeranalytik I und (Polymer
Analysis I and), Georg Thieme
Verlog, Stuttgart 1977]. The acrylate rubber as the graft base (a) can also be a diene rubber with a cross-linked core of one or more conjugated dienes such as polybutadiene, or a conjugate of a conjugated diene and an ethylenically unsaturated monomer such as styrene and/or acrylonitrile. The product can be a polymer-containing product. The content of the polydiene core in the graft base (a) can be from 0.1 to 80% by weight, preferably from 10 to 50% by weight, based on (a). The shell and core can be independently of each other non-cross-linked, partially cross-linked, or highly cross-linked. The following can be summarized as particularly suitable kraft bases (a) for polyacrylate-based graft polymers (C): 1. Acrylate polymers and copolymers without diene rubber core and 2. Diene rubber core acrylate polymers and copolymers containing Grafting yield, i.e. grafted monomer
The amount of (b) and the proportion of graft monomer (b) used are generally from 20 to 80% by weight. Measurements were made by M.Hoffmann.
H. Kro¨mer and R. Kuhn, Polymer analytik
(Polymer Analysis), Volume 1, Georg Thieme
It can be performed as described in Verlag, Stuttgart 1977. Suitable grafting monomers (b) include α-methylstyrene, styrene, acrylonitrile, methyl methacrylate or mixtures of these monomers. A suitable graft monomer mixture is a mixture of styrene and acrylonitrile in a weight ratio of 90:10 to 50:50. Such graft polymers (c) based on polyacrylates can be used, for example, in the German Patent Application Publication DE
-AS) No. 2444584 (= U.S. Patent No. 4022748)
and German Patent Application No. 2726256 (=US Patent No. 4096202). Particularly preferred graft polymers of this type contain from 2 to 20% by weight, preferably from 2 to 15% by weight, based on (c), of monomer (b) in the absence of a suspending agent; 80-98% by weight, preferably 85-97% by weight based on
is obtained upon grafting onto a completely crushed latex suspended in water. The resulting powdered graft polymer is then dried, and the mixture according to the invention (c) has an average particle size d ₅₀ of 0.05 to 3 μm;
It is homogenized with the other components in the desired proportions under the action of shearing forces, preferably to a thickness of 0.1 to 2 μm, in particular 0.2 to 1 μm. The expression "in the absence of a suspending agent" means that there are no substances capable of suspending the grafting monomer (b) in the aqueous phase, depending on the type and amount. This definition does not exclude the presence of substances that have a suspending effect, for example, during the preparation of the grafted base; in such cases, the flocculant or precipitant used to disrupt the latex (a) It must be added in an amount that compensates for the suspending effect of the substances used in the preliminary stage; in other words, it must be ensured that the grafting monomer (b) does not form any (stable) emulsion in the aqueous phase. Must be. The graft polymer (c) prepared in this way without the presence of a suspending agent can be dispersed in other resin components as a component of the molding composition according to the invention and can be compared even during long processing times at elevated temperatures. It is possible to produce extremely small particle sizes that remain unchanged. The expression "extremely small particle size" means that the number, shape and size of the graft polymer particles used are essentially dependent on the number, shape and size of the graft polymer particles introduced into the other molten resin components even after homogenization. It means to be comparable. obtained as an aqueous emulsion (latex), and the latex particles contain from 1 to 20% by weight, preferably from 1 to 10% by weight, based on (a), of monomers, the monomers already being grafted as an aqueous emulsion and homopolymer or copolymer >0
Acrylate rubbers with a glass transition temperature of 0.degree. C. can also be used as graft base (a). Suitable grafting monomers of this type include alkyl acrylates, alkyl methacrylates,
These include styrene, acrylonitrile, alpha-methylstyrene and/or vinyl acetate. Such polymer bases (a) are prepared, for example, by emulsion polymerization or graft emulsion polymerization. However, these are available in solution or bulk
They can also be prepared by preparing acrylate rubbers in a polymer, followed by grafting with graft monomers, and then converting these rubbers into aqueous emulsions suitable for further grafting processing. Thus, suitable graft bases (a) for the acrylate rubber of this particular embodiment include, in addition to the polymers listed above, if appropriate a diene rubber core and ethylenically unsaturated polymerizable monomers. There are graft polymers prepared in aqueous phase emulsions from acrylate polymers or copolymers containing polymers. Component (D) The polyether-imide-based thermoplastic polymer used according to the invention has the formula () structural units, where "n" is the degree of polymerization and corresponds to a number average molecular weight (n) of 10,000 to 50,000 g/mol. The thermoplastic polyether-imides have a high heat distortion point; they have a Vicat heat distortion point of above 200° C. when measured according to DIN 53450. Polyether-imides can in principle be prepared by different methods using different intermediates. Conventional methods use N-methylphthalimide as the starting material. This is nitrated at the 3-position and the bisphenol is reacted with the disodium salt of A to yield BPA (bis-n-methylphthalimide)-ether. This is subjected to a condensation reaction with m-phenylene diamine to form a high molecular weight polyether-imide. Monofunctional amines, such as stearylamine, can also be used to control the molecular weight. Another synthetic method starts with the reaction of 3-nitrophthalic anhydride with m-phenylenediamine, followed by a condensation reaction with the disodium salt of bisphenol A. It is advantageous here to use monofunctional phenols as molecular weight regulators. Further details are given, for example, in US Pat. No. 3,838,097. Examples of polyether-imides include the commercially available Messrs.
1000 TM". Conventional Field Components (A) to (D) are known as such. Mixtures of polycarbonate and polyester are also known (eg German Patent No. 1187793).
(see German Patent Application No. 1694124 and German Patent Application No. 2622414). Mixtures of polyesters and grafted polymers are likewise known (for example from US Pat.
3919353 and 3564077, DE 2659338 or US Pat. No. 4,096,202 and DE 2726256]. Mixtures of polycarbonates and polymers are likewise known [see, for example, Patent Application Publication No. 18611/68 (Teijin, priority June 30, 1965), U.S. Pat.
3663471, 3437631, 4299928 or German Patent Application No. 3114494]. Mixtures of polycarbonates, polyesters and grafted polymers are likewise known [for example US Pat. No. 3,864,428, German Patent Application No. 2343609, US Pat. No. 25920, U.S. Patent No. 4257937, European Patent Application Publication No. 20605
No. WO 80/00972, German Patent No. 1569448
or British Patent No. 1007724]. Although molding compositions of polycarbonate, polyester and elastomeric polymers have many positive properties, these do not meet certain requirements. Molded articles produced therefrom, especially thin molded articles, tend to exhibit distortion phenomena when exposed to prolonged heat, for example during lacquering. Therefore, there is an urgent technical need to raise the heating strain point of such molding compositions to 120° C. or higher if possible. However, the physical and chemical properties of polycarbonate/polyalkylene terephthalate mixtures, which are known to be good, should at the same time be largely retained. Based on polycarbonate, polyalkylene terephthalate and, if appropriate, one or more polymers, the strain properties are extremely positive due to the presence of small amounts of O,O,O',O'-tetramethylbisphenol polycarbonate. Thermoplastic molding compositions which are influenced in a similar manner are known from German Patent Application No. 31 18 697.
However, these mixtures contain O, O, O′,
The presence of O'-tetramethylbisphenol polycarbonate has the disadvantage that its toughness is considerably impaired. The mixtures according to the invention do not have this disadvantage. It is surprising that the bicut temperature of the mixtures of the invention increases considerably as a result of the substantially improved strain properties, since the heating strain point of the polycarbonate is only slightly increased by the addition of polyether-imide. This is because it only increases to . As a result of the polyether-imide addition, the molded articles produced from the molding composition according to the invention are
No distortion at temperatures up to 130°C. This molding can therefore be lacquered without problems using suitable lacquering systems and is resistant to benzene and can be used for multi-component automobiles with high impact values even at low temperatures. Can be done. The molding composition according to the invention can be prepared using conventional mixing equipment,
For example, they can be produced in mills, kneaders and single-screw and multi-screw extruders. It is suitable to first premix the polycarbonate and polyether-imide and only to mix the remaining components in a subsequent operation. Thus, the present invention also provides (A) a weight average molecular weight w (measured by light scattering method) between 10,000 and 200,000.
Thermoplastic, aromatic polycarbonate with 95~
50 parts by weight, (B) 50 to 5 parts by weight of thermoplastic polyalkylene terephthalate, if appropriate (C) 0 to 30, preferably 1 to 20, especially 1 to 20, especially 3 to 15 parts by weight, in each case the sum of parts by weight of (A) + (B) + (C) is 100 parts by weight, and (D) the sum of parts by weight of (A) + (D). 1~ as a standard
20% by weight, preferably 1-16% by weight, especially 2-10%
To prepare a molding composition of thermoplastic polymer (D) based on % by weight of polyether-imide, components (A) and (D) are mixed at a temperature between 290°C and 350°C in a suitable mixing apparatus. the mixture is then granulated and component (B) and, if appropriate, component (C) are mixed in a subsequent operation at a temperature between 260°C and 290°C. The present invention relates to a method for producing the molding composition. Furthermore, the invention provides in each case polycarbonate (A)
and thermoplastic polymer (D) from 1 to
20% by weight, preferably 1-16% by weight, especially 2-10%
characterized in that it contains % by weight of a thermoplastic polymer (D) based on polyether-imide,
It concerns a thermoplastic aromatic polycarbonate having a weight average molecular weight w (w measured by light scattering method) of between 10,000 and 200,000. The invention also provides thermoplastics based on these polycarbonates (A) and polyether-imides for the production of molding compositions of (A) + (B) + (D) and, if appropriate, (C) according to the invention. It concerns the use of mixtures of polymers (D). The molding composition according to the invention contains up to 5 parts by weight of ethylene monomer or copolymer, based on the total weight of components (A) + (B) + (C) + (D), in order to increase the resistance to benzine. May include coalescence. Related ethylene copolymers include polyethylene;
The groups consist, in addition to ethylene groups, of groups of other copolymerizable monomers up to 30% by weight, based on the ethylene copolymer. Examples of other copolymerizable monomers for the preparation of these ethylene copolymers include (meth)acrylic acid and those indicated above for the preparation of the graft base and grafted components for the polymer (C). There is a monomer. The molding compositions according to the invention contain the usual additives for polycarbonates and/or polyesters, such as lubricants and mold release agents, nucleating agents, stabilizers,
Fillers and reinforcing agents, flame retardants and/or dyes may be included. The filled or reinforced molding composition can contain up to 30% by weight of fillers and/or reinforcing agents, based on the reinforced molding composition. A preferred reinforcing agent is glass fiber. Suitable fillers which may also have a reinforcing effect include glass beads, micas, silicates, quartz talc, titanium dioxide and wollastonite. Polyester molding compositions treated with flame retardants are generally classified as flame retardant molding compositions.
Contains flame retardants in concentrations less than 30% by weight. Suitable flame retardants known for polycarbonates or polyethers or elastomeric polymers are, for example, polyhalogenodiphenyls, polyhalogenodiphenyl ethers, polyhalogenophthalic acids and their derivatives, polyhalogenoligoes and polycarbonates, The corresponding brominated products are particularly effective. They also generally contain synergistic agents, such as antimony trioxide. The molding compositions according to the invention of thermoplastic polymers based on polycarbonates, polyalkylene terephthalates, polyether-imides, if appropriate elastomeric polymers and, if appropriate, other additives as mentioned above, can be used to form molded products, such as bumpers, etc. Crash bar or wheel cap
cap) and thus used, for example, in automotive exterior parts. Ingredients used in the Examples: Bisphenol A, prepared from phenol and phosgene in a known manner, in methylene chloride at 25
Relative viscosity when measured at 0.5 g/100 ml of solvent at °C
1.285 polycarbonate. Has the trademark “UItem1000TM Resin”
Polyether-imide from Messrs.General Electric. This product has the chemical structure shown above and a number average molecular weight of 19200 (determined by vapor pressure osmometry). Solvent in methylene chloride at 25°C
The relative solution viscosity was 1.228 when measured at a concentration of 0.5 g/100 ml. Phenol/o-dichlorobenzene (1:1 weight ratio) in an Ubbelohde viscometer.
Polybutylene terephthalate having an intrinsic viscosity of 1.18 dl/g when measured at 25° C. and prepared by known methods from dimethyl terephthalate and butane-1,4-diol. Melt index of 6-8 g/10 minutes (measured at 190 °C under a load of 2.16 kp according to DIN 53735)
and a density of 0.924 g/cm ³ (measured according to DIN 53479)
A terpolymer having the following properties and prepared by known methods from ethylene, acrylic acid and tert-butyl acrylate in a weight ratio of 89:4:7. A graft base of 80% cross-linked polybutadiene (gel content >70% when measured in toluene) prepared by known methods and consisting of 72 parts of styrene and 28 parts of acrylonitrile.
Graft polymer with 20% grafted component. 0.5 per 100 ml of solvent in methylene chloride at 25°C
O, O, O', O'- with a relative viscosity of 1.29 in g
Polycarbonate of tetramethylbisphenol A, phenol and phosgene. Preparation of the molding composition The polycarbonate and polyetherimide were first melted and homogenized in a twin-screw extruder at a temperature of 320° C. under a nitrogen atmosphere. Further, similar to the manufacturing process, the remaining ingredients and premix were then homogenized. Before exiting the nozzle, the molten strand was degassed, cooled in water, granulated, and dried. The particles were processed on an injection molding machine. Table 1 shows the results. 【table】

Claims (1)

[Claims] 1 (A) Weight average molecular weight w between 10,000 and 200,000
(w is measured by light scattering method) thermoplastic,
95 to 50 parts by weight of aromatic polycarbonate, (B) 50 to 5 parts by weight of thermoplastic polyalkylene terephthalate,
and optionally (C) 0 to 30 parts by weight of an elastomeric polymer having a glass transition temperature below -20°C, in each case the sum of parts by weight of (A) + (B) + (C). In a thermoplastic molding composition that is 100 parts by weight, the polycarbonate component (A) is 1 to 100 parts by weight based on the sum of (A) + (D).
A thermoplastic molding composition characterized in that it contains 20% by weight of a thermoplastic polymer (D) based on polyether-imide. 2. A patent claim characterized in that the polycarbonate component (A) contains from 1 to 16% by weight, based on the sum of (A) + (D), of a thermoplastic polymer (D) based on polyether-imide. The molding composition according to item 1. 3. A patent claim characterized in that the polycarbonate component (A) contains from 2 to 10% by weight, based on the sum of (A) + (D), of a thermoplastic polymer (D) based on polyether-imide. The molding composition according to item 1. 4 Consists of components (A) + (B) + (D) and, if appropriate, (C),
Claim 1, further comprising an ethylene homopolymer or copolymer, a lubricant, a mold release agent, a nucleating agent, a stabilizer, a filler, a reinforcing agent, a flame retardant and/or a dye. molding composition. 5 (A) Weight average molecular weight between 10000 and 200000 w
(w is measured by light scattering method) thermoplastic,
95 to 50 parts by weight of aromatic polycarbonate, (B) 50 to 5 parts by weight of thermoplastic polyalkylene terephthalate,
and optionally (C) 0 to 30 parts by weight of an elastomeric polymer having a glass transition temperature below -20°C, in each case the sum of parts by weight of (A) + (B) + (C). 100 parts by weight, and the polycarbonate component (A) is (A)+
A method for producing a thermoplastic molding composition comprising 1 to 20% by weight of a polyether-imide-based thermoplastic polymer (D) based on the total of component (A). and (D) in a suitable mixing device.
Homogenize at a temperature between 290°C and 350°C, then granulate the mixture and add component (B) and, if appropriate,
(C) and/or if appropriate ethylene homopolymers or copolymers, lubricants, mold release agents, nucleating agents, stabilizers, fillers, reinforcing agents, flame retardants and/or dyes for subsequent operations. A method characterized in that the mixing is carried out at a temperature between 260°C and 290°C.