MXPA99005641A - (methyl)methacrylate maleic acid anhydride copolymers as polymer modifying agents for plastics and mixtures and polymer composites produced therewith - Google Patents

Abstract

The invention concerns a mixture or polymer composite of a copolymer (CP) comprising between 70 and 99.9 wt%methylmethacrylate, between 0.1 and 5 wt%maleic acid anhydride and between 0 and 25 wt%further vinylically copolymerizable monomers which, apart from the vinyl function, have no further function groups, with a polymethacrylate-compatible plastics (VK) and a polymer (PN) which contains at least one terminal nucleophilic group.

Description

COPOLYMERIZED ACID (METHYL) METHACRYLATE- MALEIC ANHYDRIDE AS POLYMER MODIFICATION AGENTS FOR PLASTICS AND MIXTURES AND POLYMERIC COMPOUNDS OBTAINED WITH THEY Not to mention a few exceptions, such as polymethyl ethacrylate. and copolymer acrylonitrile-butadiene-styrene (ABS), polymethylmethacrylate and CPV or polystyrene (PS) and poly [(2,6-dimethyl) -1,4-phenylene oxide], various plastics are incompatible with each other and, for energy reasons , they can not be mixed together [see TK K ei, H.L. Frisch, Macromolecules, 11, 1267 (1978)]. The homogeneous mixtures of various plastics are rather an exception in the molecular plane. The preparation of a mixture or. an alloy or a compound or mixture of incompatible polymers is technically difficult and, as a rule, due to phase separation, leads to materials with poor utilization properties compared to individual components (demixing of the mixture, delamination of the compound). However, it often seems technically desirable to be able to combine the good material properties of various plastics with one another. Thus, for example, polyamides (PA) are characterized by excellent chemical resistance, fluidity during processing and thermal resistance; On the other hand, they have deficiencies regarding their stability of dimensions. US Pat. No. 4,946,918 (Nippon Oil and Fats Co.) describes compatibility agents for blends of synthetic resins, such as, for example, various types of polyamides, polycarbonate / ABS types and polycarbonate / poly (butylene terephthalate) types. ). These compatibility agents are copolymers of maleic acid anhydride, maleic acid or maleic acid salts with polyoxyalkylenes. European Patent EP-A 113 105 describes a process for the preparation of mouldable masses in thermally resistant form, a mixture of a copolymerized (I), consisting of methyl methacrylate, vinylaromat and maleic acid anhydride, and a copolymerized (II) being prepared. , which consists of methylmethacrylate and, eventually, other comonomers. German Patent DE-A 44 40 219 describes a process for obtaining copolymers of alkyl ethacrylate, vinylaromates and maleic acid anhydride. The polymerization can take place at low temperatures in the range of, for example, 50 to 60 ° C, in a polymerization chamber. Next, the block polymer can be extracted, milled and subjected to a degassing extrusion with subsequent granulation. Copolymers of acrylonitrile-butadiene-styrene (ABS) have, for example, a very good resistance and elasticity to shock, even at low temperatures, good strength and dimensional stability, with, however, only poor resistance to the agents Chemical and insufficient fluidity and thermally resistant form. Through trials described in the specialized literature [M. Stolp, H.-J. Radusch; Kunststoffe 8_5, 4, (1995)], it is known that both ABS and PA materials are incompatible with each other and even mixing only small portions of polyamide with copolymerized acrylonitrile-butadiene-styrene (ABS) leads to a clear embrittlement of ABS . This embrittlement of plastic parts - prevents, among other things, also recycling. Thus, the object of the present invention is to provide the way to be able to prepare certain mixtures or polymeric compounds of plastics incompatible with each other, at least while preserving the positive material properties of the individual components. In particular, these are mixtures of plastics compatible with polymethacrylate (VK), for example, polymethyl methacrylate (PMMA), copolymerized acrylonitrile-butadiene-styrene (ABS) or polyvinylidene fluoride (PVDF) with polymers (PN), which contain at least one terminal nucleophilic group (such as, for example, an amino or hydroxyl group). Polyamides (PA) and polyesters are mentioned as examples of the polymers (PN). Polyamides (PA) are preferred, for example, PA3, PA4, PA5, PA6, PA7, PA8, PA9, PA10, PAll, PAl2, which are obtained by polycondensation of α-aminocarboxylic acids or by polymerization of the corresponding lactams. As polyesters, mention may be made in particular of polyethylene terephthalate and polybutylene terephthalate. Polyamides, in particular PA6, are preferred PA6.6, PA.sub.10, PA.10, PA.sub.ll, PA.sub.2, the "double number" polyamides (PA6.6, PA.sub.10) being obtained by the reaction of a-? -diamino compounds with a,? - dicarboxylic acid compounds (see in this regard, for example: Elias, HG (1981) Makromoleküle: Struktur, Eigenschaften Synthesen, Stoffe, Technologien; 4a. corrected and augmented edition, Hüthig und Wepf-Verlag; Chapter 28. 2"Polyamide 'J p.796 and following.) The goal has surprisingly been found to be achieved by using a polymeric modifying agent.

(CP), which consists of the monomeric components methylmethacrylate (MMA), maleic acid anhydride (MSA) and, optionally, other radically polymerizable comonomers that do not contain other functional groups. . The other comonomers are not critical for the possibility of carrying out the invention, provided that, in addition to the functional vinyl group that is opened in the radical polymerization, they do not contain other functional groups, such as, for example, acid or hydroxyl groups. Suitable comonomers are, for example, esters of methacrylic acid (for example, ethyl methacrylate, butyl methacrylate, hexylmethacrylate, cyclohexyl ethacrylate), esters of acrylic acid (for example, methylacrylate, ethylacrylate, butylacrylate, hexylacrylate, cyclohexyl acrylate) or styrene and styrene derivatives , such as, for example, α-methylstyrene or p-methylstyrene. By means of the reactive bond, a modification of the polymer (PN) is obtained, which contains at least one terminal nucleophilic group, and thus, to a considerable improvement of the properties profile of the aforementioned polymer mixtures or compounds. The modification can take place, for example, by melting a mixture of copolymerized (CP) and polymer (PN) granules. Therefore, the term used hereafter "mixtures and polymeric compounds", refers to the physical and, possibly, chemical unit of the copolymerized according to the invention, with the polymer to be modified (PN) and / or poly ethacrylate compatible plastics (VK).

Instead of maleic acid anhydride, in principle another copolymerizable acid or a copolymerizable anhydride can also be used, for example, maleic acid, itaconic acid, itaconic anhydride, fumaric acid or glutarane anhydride. However, maleic anhydride is especially preferred. The invention relates to polymer blends and copolymerized compounds (CP), which consist of 70-99.9% by weight of methylmethacrylate, 0.1-5% by weight of maleic anhydride and 0-25% by weight of other vinyl-copolymerizable copolymerizable monomers , which, with the exception of the vinyl function, do not present other functional groups, with a plastic compatible with polymethacrylate (VK) and a polymer (PN), which contains at least one terminal nucleophilic group. The copolymers of MMA with MSA are known from the specialized literature. Thus, in the German Description DE 2,274,360 (Co. BAYER AG), a method for obtaining molding compositions poor in residual monomers is described; among the examples is also a terpolymer of cyclohexyl methacrylate-MMA-MSA. In this case, the polymerization is carried out at an internal reactor temperature of 140 ° C until a 40% reaction, the polymeric syrup is then concentrated in a special degassing device and, in a further process step, is degassed in a helical machine up to residual monomer contents < 0.1%.

In the document Jpn. Kokai Tokkyo Koho JP 60,141,708 (C.A. 104: 6583e) copolymers of 67-99% by weight of MMA with 1-33% by weight of MSA are claimed. The polymerization takes place in this case at 160 ° C until a reaction of 62%. Then, the syrup is heated to 200 ° C and then degassed at 230 ° C in an extruder. Both procedures described are technically. costly and economically unattractive, and also have the disadvantage that large quantities of non-transformed monomers must be removed from the product by various degassing devices. The use of the products thus obtained as polymeric modifying agents for mixtures and incompatible polymer compounds is not mentioned. The copolymers according to the invention (CP) consist of: 70-99.9% by weight of methylmethacrylate, 0.1-5% by weight of maleic anhydride and 0-25% by weight of other methacrylic acid esters, acid esters acrylic or styrene derivatives, which do not contain other functional groups. They are obtained by polymerizing the monomers substance, adding radical chain initiators and molecular weight regulators, at temperatures <; 80 ° C with reactions > 95%, preferably > 98%. The polymerization is initiated in a manner known per se, by polymerization initiators that form radicals, however, it can also be carried out in a purely thermal manner, with a low polymerization rate. Usually, it is sufficient to add the polymerization initiator once before the polymerization initiator, thus choosing the polymerization initiator, which under the polymerization conditions, until the end of the polymerization, sufficient radical formation takes place . As examples of polymerization initiators, there may be mentioned: azo compounds, such as 2,2-azobis- (isobutyronitrile) or 2,2'-azobis (2,4-dimethylvaleronitrile), redox systems, such as, for example, the combination of tertiary amines with preferred peroxides or peroxides (see, for example, H. Rauch-Puntigam, Th. Vdlker, "Acryl- und Methacrylverbindungen", Springer, Heidelberg, 1967 or Kirk-Othmer, Encyclopedia of Chemical Technology, Vol. 1, pages 386 et seq., J. Wiley, New York, 1978). Examples of suitable peroxide polymerization initiators are dilauroyl peroxide, ter. -butylperoctoate, ter. - Butylperiononanoate, dicyclohexylperoxydicarbonate, dibenzoyl peroxide or 2,2-bis- (tert-butylperoxy) -butane. Also preferably, the polymerization can be carried out with a mixture of different polymerization initiators with different half-exchange period, for example, dilauroyl peroxide and 2,2-bis- (tert-butylperoxy) -butane, to keep constant the flow of radicals in the course of polymerization, as well as at various polymerization temperatures. The amounts used of the polymerization initiator are generally between 0.01 and 2% by weight, based on the monomer mixture. The molecular weight adjustment of the copolymers (CP) is effected by polymerizing the monomer mixture in the presence of molecular weight regulators, such as, in particular, the known mercaptans, such as, for example, n-butyl mercaptan, n -dodecyl ercaptan, 2-mercaptoethanol or 2-ethylhexylthioglycolate, the molecular weight regulators being used in general in amounts between 0.05 and 5% by weight based on the monomer mixture, preferably in amounts between 0.1 and 2% by weight, particularly preferred in amounts between 0.2 and 1% by weight based on the monomer mixture (see, for example, H. Rauch-Puntigam, Th.Volker, "Acryl- und Methacrylverbindungen", Springer, Heidelberg, 1967; Houben-Weyl, Methoden der organischen Chemie, Vol. XIV / 1, page 66, Georg Thieme, Heidelberg, 1961 or Kirk-Othmer, Encyclopedia of Chemical Technology, Vol. 1, pages 296 et seq., J. Wiley, New York, 1978). Preferably, n-dodecyl mercaptan is used as molecular weight regulator. The average molecular weights Mw, adjusted in this way, of the copolymers (CP) are generally between 104 and 5 x 105 Dalton, preferably between 3 x 10-4 and 2.5 x 105 Dalton, viscosities correspondingly reduced? Spec./ c, measured according to ISO 1628-6 in chloroform, from 10 to 150 mlg-1, preferably from 15 to 100 mlg-1, based on the polymethylmethacrylate as the calibration standard (for the determination of the average molecular weights Mw, see, for example, example, HF Mark et al., Encyclopedia of Chemical Science and Technology, Vol. 10, pages 1 to 19, J. Wiley, New York, 1978). Likewise, the monomer mixtures, in addition to the polymerization initiators and molecular weight regulators, can contain other additives, such as, for example, UV absorbers, antioxidants, dyes or pigments, as well as deformation aids in portions of up to 10% in weight referred to the monomers used. The preparation of the copolymers (CP) from the monomer mixtures is preferably carried out by polymerization of the substance, especially preferred in suitable polymerization chambers of usual construction. In general, the polymerization chambers, during the same, are tempered in water baths at temperatures between 20 and 80 ° C, to maintain a homogeneous radical flow from the decomposition of the polymerization initiator. After the polymerization is complete, which leads to monomer transformations of at least 95%, preferably at least 98%, the copolymers (CP) are removed as a block from the polymerization chamber. After tempering at temperatures in the range of 100 ° C-140 ° C, the polymerizates are mechanically ground, degassed in an extruder (partly under vacuum) and then granulated. The degassing step is performed to reach residual monomer contents less than 1, in particular less than 0.5% by weight. Because of the lower polymerization temperature and the higher reaction, the copolymerization behavior of the monomers is considerably influenced, in such a way that the methacrylate-MSA (CP) copolymers according to the invention differ markedly in their architecture of the copolymers obtained at higher temperatures of Japanese Patent JP 60,141,708 or of German Patent DE 2,724,360. The reaction and the polymerization temperature determine the probability of fixing each monomer to the growing polymer chain, and thus also the distribution of sequence length in the polymers, in particular when the polymerization temperature approaches the maximum temperature of one. of the comonomers (as in Japanese Patent 60,141,708 in the case of MMA) or even exceeds it. This behavior is known in the specialized literature and is illustrated, for example, by Witt er in the example of the copolymerization of MMA with α-methylstyrene [P. Wittmer, Makromol. Chem; 103, 188, (1967)]. Transferred to the case described in the present invention, it is to be assumed that the smaller the difference between the polymerization temperature and the maximum of MMA, the lower the probability of forming long MMA sequences in the polymerization and the greater the probability that the comonomer does not reactive, in this case MSA, is attached to the growing polymer chain. The methacrylate-MSA (CP) copolymers according to the invention are used according to the invention as a polymeric polymer modification agent (PN), which contain at least one terminal nucleophilic group. The methacrylate-MSA (CP) copolymers according to the invention are also used according to the invention as polymeric modifying agents of incompatible mixtures and polymer compounds, consisting of plastics compatible with PMMA (VK) and polymers (PN) , which contain at least one terminal nucleophilic group. The modification is usually carried out in the molten state, it being possible both to melt together all the components of the mixture, or also, first, to obtain a preliminary mixture of the methacrylate-MSA (CP) copolymers with one of the components of the mixture of polymers, then adding the other components. The addition of the other components can be effected, for example, "in line" after composing the preliminary mixture, for example, through a lateral dosage of solid in the mixture extruder. In addition, the preliminary mixture obtained can be mixed with the other components by a separate composition process. Likewise, the methacrylate-MSA (CP) copolymers according to the invention can be used according to the invention as adhesives between the thermoplastics, which are incompatible with each other, for example to avoid the risk of delamination in a composite of several components. layers. The modification can be effected in this case, for example, by extrusion of several layers of the components together, the copolymerized methacrylate-MSA (CP) according to the invention forming the intermediate layer between the thermoplastics described above, incompatible with each other. It is also possible to co-extrude a preliminary mixture, which consists of methacrylate-MSA copolymers (CP) according to the invention with the thermoplastic compatible with PMMA (VK) or the polymer (PN), which contains at least one terminal nucleophilic group, and the third component. In the case of plastic compounds, by means of the polymeric modification agent (CP) the recyclability of the composite materials is also guaranteed, when with a regranulation processing an improvement of the mechanical properties is achieved. The effectiveness of methacrylate-MSA copolymers in the aforementioned applications is possibly due to the special architecture of the polymer chains. Characterized by the copolymerization parameters, the MSA is not well incorporated into the polymer chain. Thus, preferably at low polymerization temperatures, long MMA sequences are formed within the polymer chains, which could be responsible for an ezclability with polymers compatible with PMMA (VK). It is known from the literature that mixtures of normally non-compatible polymers can be stabilized by graft or block copolymers, which can enter into strong interaction with both components of the mixture [P. Guégan et al., Macromolecules 27 (1994) 4993-4997]. These substances that provide compatibility have a behavior analogous to the soap molecules in a water / oil boundary surface, and for this reason they are called "polymeric emulsifiers" or "polymeric dispersants". By mixing diblock or graft copolymers of the monomer units of the components of the mixture of the polymeric mixture with the polymer mixture of several phases, these copolymers act as compatibility agents between the polymers, where, due to their partial solubility in the both polymer phases, are located in the boundary surface between phases, reduce the limit surface energy and, thus, decisively increase the adhesive force. They are a condition for thus providing compatibility, sufficiently long sequences of both polymeric components in the copolymer and the absence of total compatibility of the copolymer with any of the two components of the mixture, so that the copolymers that provide compatibility actually concentrate on the boundary surface between phases. If a separate process is required to obtain these sequence polymers, the process becomes complex and is linked to high costs. In the case of the invention shown here, however, a separate production of the sequence polymers can be dispensed with, since the mixing process of the polymers (composition) is combined with the production of the sequence polymers. they provide compatibility. This process is a special case of reactive extrusion and is referred to as "reactive composition" [MK Akkapedi, B. Van Buskirk and JH Glans, "Reactive Alloying of Polymers through Addition and Condensation Reactions", International Conference on Advances in High Performance Polymer Alloys (1991).] As observed in the examples illustrated below, under the mixing conditions a reactive bond of the nucleophilic terminal groups of the polymer (PN) to the anhydride groups in the methacrylate copolymers takes place in the melt. MSA (CP), so that these can act as compatibility agents In the case of multilayer extrusion, graft copolymers are formed at the boundary surface between phases and thus cause an efficient adhesion of the compound. Following are methods for the characterization of the reactive interaction between the polymers: 1.) Measurement of the torque during the mixing process Polymers in a Plunger Kneader Graft copolymerization (formation of polymeric compounds) between reactive components of a polymer mixture leads to an increase in molecular weight, which results in an increase in viscosity and, of this, an increase in the torque of the kneading elements. The torque division of the polymer mixture, which contains a modifying agent that provides compatibility, by the torque of a polymer mixture, in which, instead of the modifying agent that provides compatibility, a non-polymerized polymer was used. Reactive, otherwise, however, of analogous constitution, leads to the torque increase factor ("DEF"). This characterizes the strength of the reactive interaction between the components of a polymer mixture. 2.) Determination of the mechanical properties in injection molded sample bodies By determining the mechanical properties in sample bodies molded by injection, in particular of shock elasticity and extension of break, when compared with sample bodies of compounds without modifying agent which provides compatibility, the quality of the phase link can be characterized..

EXAMPLES The invention is illustrated by the following examples: Example 1 Obtaining the copolymer of methyl methacrylate-MSA Ml To a monomer mixture of 7 '920 g of methyl methacrylate and 80 g of maleic anhydride are added 8 g of dilauroyl peroxide and 4 g of 2,2-bis- (ter. -butyl peroxy) -butane as a polymerization initiator and 32 g of n-dodecyl mercaptan as molecular weight regulator. The resulting mixture is filled in a polymerization chamber and degassed 10 min. Subsequently, it is polymerized in a water bath, 1 hour at 50 ° C, 21 hours at 45 ° C and 7 hours at 50 ° C water bath temperature. After removing from the polymerization chamber, the polymer is an additional 12 hours at 120 ° C in the aerated cabinet. After cooling, the polymerized material is comminuted mechanically and degassed in a mono-helical extruder at temperatures between 220 ° C (inlet zone) and 240 ° C under vacuum (p = 30-40 mbar), and then granulated. The resulting phase copolymer is clear and colorless. Does it have a reduced viscosity? sp / c in chloroform according to ISO 1628-6 of 55 ml / g, corresponding to an average molecular weight M "of approximately 120,000 Daltons (referred to a polymethylmethacrylate standard). After degassing extrusion, the product has a residual monomer content of 0.28% MMA and 0.012% MSA. EXAMPLE 2 Obtaining the copolymer of methyl methacrylate-MSA M2 To a monomer mixture of 8.077 g of methylmethacrylate and 123 g of maleic anhydride are added 2.87 g of dilauroyl peroxide and 0.82 g of 2,2-bis- (ter. -butylperoxy) -butane as a polymerization initiator and 32. 8 g of n-dodecyl mercaptan as molecular weight regulator. The resulting mixture is filled in a polymerization chamber and degassed 10 min. Subsequently, it is polymerized in a water bath, 6 hours at 65 ° C and 17 hours at 55 ° C water bath temperature. After removing from the polymerization chamber, the polymer is an additional 12 hours at 120 ° C in the aerated cabinet. After cooling, the polymerized material is comminuted mechanically and degassed in a mono-helical extruder at temperatures between 220 ° C (inlet zone) and 240 ° C under vacuum (p = 30-40 mbar), and then granulated. The resulting phase copolymer is clear and colorless. Does it have a reduced viscosity? sp / c in chloroform according to ISO 1628-6 of 55 ml / g, corresponding to an average molecular weight Mw of approximately 120'000 Dalton (referred to a polymethylmethacrylate standard). After degassing extrusion, the product has a residual monomer content of 0.19% MMA and 0.042% MSA.

EXAMPLE 3 Preparation of the copolymer of methyl methacrylate-MSA M3 To a monomer mixture of 7 '840 g of methyl methacrylate and 160 g of itialeic acid anhydride are added 8 g of dilauroyl peroxide and 4 g of 2,2-bis- (ter. -butyl peroxy) -butane as a polymerization initiator and 32 g of n-dodecyl mercaptan as molecular weight regulator. The resulting mixture is filled in a polymerization chamber and degassed 10 min. Subsequently, it is polymerized in a water bath, 2.5 hours at 50 ° C and 35 hours at 45 ° C water bath temperature. After removing from the polymerization chamber, the polymerized is an additional 12 hours at 120 ° C. in the aerated cabinet. After cooling, the polymerized material is comminuted mechanically and degassed in a mono-helical extruder at temperatures between 220 ° C (inlet zone) and 240 ° C under vacuum (p = 30-40 mbar), and then granulated. The resulting phase copolymer is clear and colorless. Does it have a reduced viscosity? sp / c in chloroform according to ISO 1628-6 of 54 ml / g, which corresponds to an average molecular weight M "of approximately 115,000 Dalton (referred to a polymethylmethacrylate standard). After degassing extrusion, the product has a residual monomer content of 0.19% MMA and 0.042% MSA.

Example 4 (comparative example) Preparation of the polymethylmethacrylate V4 The procedure is as in Example 1, except that 8'000 g of methylmethacrylate (and not maleic anhydride) are used as the monomer. The resulting polymer is clear and colorless. Does it have a reduced viscosity? sp / c in chloroform according to ISO 1628-6 of 55 ml / g, corresponding to an average molecular weight M w of approximately 120,000 Dalton (based on a polymethyl methacrylate standard). After degassing extrusion, the product has a residual monomer content of 0.29% MMA.

Example 5 Obtaining the copolymerized MMA-cyclohexyl methacrylate-MSA M5 The procedure is as in Example 1, except that 6 '478 g of methyl methacrylate are used as the monomer mixture, 1'640 g of cyclohexyl methacrylate and 82 g of maleic anhydride. The resulting phase copolymer is clear and colorless. Does it have a reduced viscosity? sp / c in chloroform according to ISO 1628-6 of 52 ml / g, corresponding to an average molecular weight M w of approximately 110,000 Dalton (based on a polymethyl methacrylate standard). After degassing extrusion, the product has a residual monomer content of 0.21% MMA, 0.19% cyclohexyl methacrylate and 0.028% MSA.

Example 6 (comparative example) Preparation of the copolymerized MMA-cyclohexylmethacrylate V6 To a monomer mixture of 6 '400 g of methyl methacrylate and 1.600 g of cyclohexyl methacrylate are added 2.8 g of dilauroyl peroxide and 0.8 g of 2,2-bis- (tert-butylperoxy) -butane as polymerization initiator and 32 g of n-dodecyl mercaptan as molecular weight regulator. The resulting mixture is filled in a polymerization chamber and degassed 10 min. Subsequently, it is polymerized in a water bath, 5 hours at 65 ° C and 17 hours at 55 ° C water bath temperature. After removing from the polymerization chamber, the polymer is an additional 12 hours at 120 ° C in the aerated cabinet. After cooling, the polymerized material is comminuted mechanically and degassed in a mono-helical extruder at temperatures between 220 ° C (inlet zone) and 240 ° C under vacuum (p = 30-40 mbar), and then granulated. The resulting phase copolymer is clear and colorless. Does it have a reduced viscosity? sp / c in chloroform according to ISO 1628-6 of 51 ml / g, corresponding to an average molecular weight Mw of approximately 105,000 Dalton (referred to a polymethylmethacrylate standard). After degassing extrusion, the product has a residual monomer content of 0.31% MMA and 0.24% cyclohexyl methacrylate.

Examples 7-12 For the characterization of the reactive interaction of the compatibility agent with the terminal nucleophilic component of the polymeric mixture, 45 g of "Vestamid X 4887" (polyamide-12, manufacturer: Hüls AG, viscosity index according to DIN) were mixed. 53727: 180 ml / g, ratio of amino end groups to carboxyl: 5 to 1) with respectively 5 g of the polymers described in Examples 1-6, in a discontinuous plunger kneader (Co. "Brabender", volume of the kneading chamber: 60 ml) at 230 ° C and a number of revolutions of the kneading elements of 30 rpm. The torque was recorded during the kneading process as a function of time. After 6 min, a constant level of torque was reached (equilibrium torque "GDM"). To calculate the respective torque increase factor ("DEF"), the "GDM" of the melted mixtures of Examples 7-10 was divided, or, 11-12 between the "GDM" of the corresponding melted mixture. , base of the non-reactive modifying agent (Example 10, or, 12). The "DEF" thus obtained are shown in the following table.

Example 13 For the characterization of the reactive interaction of the compatibility agent of Example 2 with the thermoplastic polybutylene terephthalate material also nucleophilic-terminal ("Vestodur 3000", manufacturer: Hüls AG, viscosity index according to DIN 53727: 165 ml / g, proportion of carboxyl end groups with respect to hydroxyl: 3 to 2), analogously to the procedure described in Examples 7-12, the "DEF" was determined. The mixing temperature was in this case 260 ° C. As a result, a "DEF" (= "GDM" of the mixture of VESTODUR 3000 with M2 divided between the "GDM" of the mixture of VESTODUR 3000 and V4) of 3.5 was obtained.

Examples No. 14-18 Polyamide-6 (Ultramid, Co. "BASF") and ABS (acrylonitrile / butadiene / styrene copolymer; "Ronfalin FZ 336", Co. "DSM") were mixed with various portions of M5 compatibility agent. of Example 5, in a monoblock extruder "Storck" of diameter 35, at 240 ° C. The portion of the ABS component remained constant in the series of tests. From the obtained compounds, for the characterization of the fluidity the "Meit Flow Rate" ("MFR") at 240 ° C and a load mass of 5 kg was determined. In order to characterize the shock elasticity ("KSZ") ("Izod", ISO 180 IA) and the extension of breakage, in a helical injection molding machine "Battenfeld 350-CD" were produced sample bodies of dimensions 80x10x4 mm with a cylinder temperature of 245 ° C and a tool temperature of 50 ° C. The cycle time was "44 s.The results obtained are shown in the following table.

Based on the results of Examples 14-18 it is clear that by adding 5-10% by weight of the compatibility agent M5 an optimum in the mechanical properties of the compound is achieved. Particularly preferred is the concentration range of 5-10% by weight of the compatibility agent in the basic mixture PA / ABS.

Claims (6)

NOVELTY OF THE INVENTION Having described the foregoing invention, the content of the following is claimed as property: CLAIMS

1. A polymeric mixture or compound of a copolymerized (CP) of 70-99.9% by weight of methylmethacrylate, 0.1-5% by weight of maleic anhydride and 0-25% by weight of other vinyl-copolymerizable monomers, which, with the exception of the vinyl function does not present other functional groups, with a plastic compatible with polymethacrylate (VK) and a polymer (PN), which contains at least one nucleophilic group terminal.

2. A mixture or polymeric compound according to claim 1, characterized in that the plastic compatible with polymethacrylate (VK) is a polymethyl methacrylate (PMMA), a copolymerized acrylonitrile / butadiene / styrene (ABS) or a polyvinylidene fluoride (PVDF).

3. A mixture or polymeric compound according to claim 1 or 2, characterized in that the polymer (PN) is a polyamide.

4. - A process for obtaining a mixture or a polymeric compound according to any of claims 1 to 3, characterized in that the components of the mixture are fused together or, first, a preliminary mixture of the copolymerized (CP) with one is obtained of the components of the polymer mixture and then the other components are added.

5. The use of a copolymerized (CP) consisting of 70-99.9% by weight of methylmethacrylate, 0.1-5% by weight of maleic anhydride and 0-25% by weight of other esters of methacrylic acid, acid esters acrylic or styrene derivatives, which do not contain other functional groups, in a mixture or a polymeric compound according to claim 1.

6. A molded body made from a mixture or a polymeric compound according to any of claims 1 to 3.