CA1065077A

CA1065077A - Compounded plastic systems and a process for the preparation thereof

Info

Publication number: CA1065077A
Application number: CA212,633A
Authority: CA
Inventors: Geza Szekely; Andor Huszar; Gyorgy Bertalan; Ilona Zaoui; Imre Molnar; Istvan Rusznak; Lajos Trezl
Original assignee: TISZAI VEGYI KOMBINAT
Current assignee: TISZAI VEGYI KOMBINAT
Priority date: 1973-11-12
Filing date: 1974-10-30
Publication date: 1979-10-23
Also published as: ES431824A1; DK586274A; GB1470124A; NO142840C; NO142840B; SE406088B; YU297874A; FR2250801A1; ATA897974A; DE2453491C2; PL98628B1; HU167063B; JPS5079547A; DK148037C; YU37181B; CH611638A5; BE821990A; DK148037B; DE2453491A1; AT348251B

Abstract

ABSTRACT OF THE DISCLOSURE

The invention relates to a compounded plastic system containing 3 to 99% by weight of a crystalline poly-olefine, 0.4 to 80% by weight of a non-crystalline poly-olefine and 0.5 to 95% by weight of a pigment and/or filling agent and optionally other polymers as well, furthermore to a process for the preparation thereof. The compounded plastic system of the invention is characterized by containing at least 0.01% by weight, preferably 0.5 to 10% by weight of a tenzide being heat-resistant up to at least 110 °C. Theses plastic system are prepared by ad-mixing the components with each other in the presence of at least 0.1% by weight, preferably 0.5 to 10% by weight of a tenzide being heat-resistant up to at least 110 °C.
The compounded plastic system according to the in-vention relating the properties of the starting system even when admixed with widely varying amounts of filling agents, and even more, in certain respects it possesses improved characteristics.

Description

10~ 7 This invention relates to a compounded plastic system containing 3 to 99% by weight of a crystalline poly-olefine, 0.4 to 80% by weight of a non-crystalline polyolefine and 0.5 to 95% by weight of a pigment and/or filling agent, and optionally other polymers as well. The invention relates further to a process for the preparation of the above-defined compounded plastic system.
As known, inorganic filling agents of mineral origin are frequently added to thermoplastic substances such as polyolefines, partly to provide them with special properties required in certain fields of application, and partly for economic reasons. As filling agents, mainly kaoline, betonite, precipitated chalk, as well as glass and asbestos fibres are used. The torsion modulus, Brinell hardness, torsion rigidity, slide-elastic modulus, specific gravity, compressive strength, weldability and resistance to warping of the polyolefine increases to a certain limit-ing value with the increase in the amount of the filling agent added; on the other hand, however, the tensile strength flexural strength, elongation at rupture, and impact-flexural strength of said polyolefines decrease to a considerable ex-tent. The decrease of the latter four strength values reveals a considerable brittling effect of the filling agents, which is due to the fact that the molten polymer does not moisten the particles of the filling agent, generally hydrophilic in nature. The decrease of the melt index with the increase of the amount of filling agent reveals the fact that the filling agent particles present in the molten polymers exert an adverse effect on its processability (Kuns~stoff-Rundschau 19, 245 /1972/; ICI

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10~i5077 Plastics Today 40, p. 7 /1971/).
Several efforts were made to decrease the incompatibility between the polymeric melts and filling agents. Thus, for example, some clay minerals were rendered organophilic utilizing their cation-exchange proper-ties, and these organophilic filling agents were admixed with the polyolefines (U.S. Patent Specification No. 3,084,117 patentee Union Oil Company, issued April 2, 1963).
The dyeability of polyolefines with basic dyestuffs can be ensured by admixing the polyolefines with organophilic clay minerals (Modern Textiles 12, 22 /1971/) or colloidal silicic acid. A disadvantage of this method is, however, that solely clay minerals can be used as filling agents, and the pre-treatment of these clay minerals causes considerable extra expenses.
Owing to the differences in the specific gravities, further difficulties arise when filling agents, even after an organophilizing pre-treatment, are to be admixed with the polymer melts in amounts higher than 5% by weight. In this instance the granular polymer should be homogenized with a part of the fill-ing agent in a prior mixing operation, and the further amount of the filling agent (exceeding 5%) can be introduced into the polymer only after this mix-ing procedure.
A disadvantage of the systems containing filling agents is that the introduced filling agents affect the physical and mechanical properties o the end-product, and the introducable amount of filling agents is rather limited.
It is also known that the cold-resisting properties and voltage-corrosion of polyolefines can be improved by admi~ing them with polyiso-~ .

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~O~;S0~77 butylene (Kunststoffe 62, 610 /1972/, U.S. Patent Specification No. 2,993,028 patentee Montecatini Società Generale, issued July 18, 1961 and German Patent Specification No. 1,469,818, patentee Veba-Chemie AG, issued February 15, 1973). Apart from the high costs of polyisobutylene, this method has the drawback that the treatment disadvantageously affects the mechanical pro-perties of the product.
The invention aims at the elaboration of a compounded plastic system containing a crystalline polyolefine together with non-crystalline polyolefine, which retains the properties of the starting compounded polymer system even when admixed with widely varying amounts of filling agents, and possesses properties in certain respects.
The invention is based on the recognition that certain properties, primarily the dyeability, electric conductivity and castability of compounded plastic systems containing a crystalline polyolefine and a non-crystalline - polyolefine can be improved even when adding a considerable amount of filling - agent to the system, if the filling agent is admixed with the compounded plastic system in the presence of a special tenzide.
The recognition is very surprising since it is known that on the one hand the mechanical properties of crystalline polyolefines impair to a considerable extent when admixing them with filling agents, and on the other hand, owing to the strong plasticizing effect of the non-crystalline polyole-~- fines, the crystalline character of the crystalline polyolefine decreases.
Thus, when adding these two substances to the crystalline polyolefine, both its mechanical properties and its orientability decrease. Consequently, one might expect that the compounded plastic . .

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10ti ~77 systems according to the invention would also have such im-paired properties. On the contrary, the compounded polymer systems according to the invention are orientable like pure crystalline polyolefines and have properties like crystalline polyolefines; furthermore, the products can also be processed by methods applicable to amorphous polymers.
The invention is based further on the recognition that high amounts of filling agents of any crystal structure or morphological properties, respectively, and of any polarity can be introduced into the compounded system in the presence : cf special tensides.
Accordingly, the invention relates to a compounded plastic system containing 3 to 99% by weight of a crystalline polyolefine, 0.4 to 80% by weight of a non-crystalline poly-olefine and 0.5 to 95% by weight of a pigment and/or filling agent and optionally other polymers as well. The compounded - plastic system according to the invention is characterized - - -by containing at least 0.1% by weight, preferably 0.5 to ~ 10% by weight, of a tenside being heat-resistant up to at - 20 least 110C.
Furthermore, the invention relates to a process for the preparation of a compounded plastic system contain-ing 3 to 99% by weight of a crystalline polyolefine, 0.4 to 80% by weight of a non-crystalline polyolefine and 0.5 to - 95% by weight of a pigment and/or filling agent and op-- tionally other polymers as well, by admixing the respective components with each other. The process of the invention is characterized in that the components are admixed with each other in the presence of at least 0.01% by weight, pre-ferably 0.5 to 10% by~weight of a tenside being heat-resistant ~ .
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. . - . - , ~O~S077 up to at least 110C.
The components are admixed with each other prefer-ably at a temperature exceeding the melting range of the crystalline polyolefine, by adding a pigment and/or filling agent, as well as a tenside separately or in admixture with each other to the melt of the crystalline and non-crystalline polyolefines.
This process can be carried out in any of the usual equipments of the plastic industry. According to a preferred method, the starting substances are converted into master batch granulates, which can be diluted with polyolefines or other thermoplastic polymers to an extent required by the special field of utilization. From this substances, obtained after diluting the master batch granulates, casted, extruded, calendered, etc. products as well as fibres can be produced, which all are well dyeable. Thus, for example, when using kaoline and montmorillonite as additive, fibres dyeable - ~th dispersion dyestuffs and basic dyestuffs, while Nhen using starch, cellulose or polyvinyl alcohol additives, fi6res dyeable with reactive and direct dyestuffs are ob-tained.
The properties of the compounded plastic systems according to the invention can be varied in accordance with - the requirements of the different fields of utilizationb~ var~ing the quantitative ratios of the respective com-ponents. Thus, for example, when increasing the amount of the filling agent up to 40% by weight the tensile strength can be increased; while when utilizing quarz flour ;~ in an amount of 36% by weight, optimum mechanical properties can be achieved. Casted products can be prepared even when - 6 ~

~ - 7 -;77 adding 82% by weight of a ceramic dielectric powder consisting of aluminium oxideJ barium carbonate and titanium dioxide to the molten polymer, and these caste products can be used without or after ignition.
As crystalline polyolefine primarily polyethylene or isotactic polypropylene, while as non-crystalline polyolefine preferably polyisobutylene can be used.
The p~gments usable in the products according to the invention comprise e.g. rutile titanium dioxide, zinc oxide, phthalocyanine blue, phthalocyanine green, and cadmium sulfide.
Of the filling agents admixable with the molten polymer system, e.g. kaoline, ~alc, benotonite, ~inc oxide, aluminiumoxide, ceramic dielectric powder, quart~flour, powdered aluminium graphite powder, glass fibre, asbestos, cement powder, silicic acid, colloidal silicic acid, precipitated chalk, sawdust, and bitumen are mentioned.
; Polymers such as polystyrene, polyamide, polyethylene glycol, styrene acrylonitrile copolymers, starch, polyvinyl alcohol, and cellulose can be used as polymeric additives.
` Depending on the field and conditions of use, futhermore on the nature of the polyolefine and other polymers, as well as the pigments and filling agents applied, non-ionic, cationic and anionic tensides can equally be used.
As non-ionic tensides primarily alkylpolyglycol ether acetates, fatty acid~ polyethyleneglycol esters, phenol-polyglycol ethers, fatty alcohol polyglycol ethers, alkylphenol polyethers, as well as condensates of diethylene triamine with fatty acids, and condensates of fatty alcohols with ethylene oxide, the latter condensates containing at least three ethylene- -oxide groups per molecule. .

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~ ` - 8 ~ 7~7 As cationic tensides e.g. cetylpyridinium salts, cetyltrimethyl ammonium bromide, dilauryldimethyl ammonium bromide, stearyldimethylbenzyl ammonium chloride and cation active fat-liquors can be used.
Of the anionic tensides usable according to the invention, sodium dodecylbenzene sulfonate, alkylaryl sulfonates, aliphatic ester sulfates, sodium alkylsulfonates, sulfonated alkylnaphthyl ethers and sodium salts of sulfonated mineral oils are mentioned as examples.
The compounded plastic systems according to the invention can be used in the most diverse fields. Thus, for example, they can be converted into castlngs for pumps and mixers, ventilator blades, fuse blocks, pipes, assemblies for lighting systems, electric insulating materials, furniture elements, articles for telecommunication applicable at high frequencies, foils, fibrillated foils and yarns, etc., by the usual pressing, casting, pressure casting or extrusion operations.
The main advantages of the compounded plastic systems as well as the process according to the invention are as follows:
a) the elongation at rupture of the product does not decrease despite o the high filling agent content, even more, the tensile strength - increases up to a filling agent content of about 40% by weight;
b) the product is orientable regardless to its ~ ' ., ~ .
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106~077 filling agent content;
c) systems far more flexible than the starting crystalline polyolefines can be prepared;
d) a filling agent of any polarity can be used;
e) the processability, such as castability, of the compounded plastic system does not change in comparison with that of the starting polyolefine;
f~ the subsequent dyeability of the polyolefine starting material can be improved;
g) the compatibilities of the polymers initially ~: incompatible with polyolefines can be increased;
h) the products can be well utilized at temperatures far exceeding the highest in-use temperature of normal PVC
even under constant loading;
j) the product is shock-proof, and, in contra-distinction to the very expensive shock-proof PVC and shock-proof polystyrene, retains its favourable mechanical properties for a practically unlimited period.
The invention is elucidated in detail by the aid ... .
o~ the following non-limiting Examples.
The term "HLB-value" as used in the Example in connection with the tensides gives the degree of ability for ~eing dispersed in water wherein the HLB-value of a tenside giving a clear solution with water is 13 and that o~ a tenside which cannot be dispersed in water at all . amounts ~o 1 (Griffi~, V.C., Official Digest Federation Paint and Varnish Production Clubs, 28, 466 /1956/). .
Example 1 A master batch was prepared from 11% by ~eight of crystalline polypropylene (melt index~
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10~077 2.5, measured at 230C under a loading of 2.16 kg.), 3% by weight of polyisobutylene ~average molecular weight: 3 x 104), 9% by weight of polyisobutylene ~average molecular weight:
1.5 x 106),

3% by weight of a fatty-acid polyamine based tenside (HLB value = 1), 3% by weight of a tenside based on an oxyethylated lauryl alcohol containing 3 ethylene oxide groups per molecule in average (HLB
value = 10), and 72% by weight of silicium dioxide ~particle size: 0.3 to 100 /um.) on a banbury-type mixer with a mixing time of 11 min., under the following mixing parameters: rotation speed of the stirrer: 105 r.p.m.; forced draft pressure: 4.3 atm., tension: 5.5 atm. The rheological behaviour of the disperse compounded melt system in the mixer showed a significant tenside-activity since, despite the high .
ratio of filling agent, the current uptake at stirring is initially only 2 A, this value increases to 4 A as a function of the stirring time, and finally decreases to 3 A at the end of the stirring. For polypropylene the currect uptake at stirring, under identical stirring conditions, amounts to 7 A, 10 A, and 3 A, respectively. This about 70% decrease in the inîtial current uptake reveals the rheologically favourable tenside action manifesting in the molten system.
The thus-obtained master batch was diluted with poly-propylene in a ratio of 1:1, 1:2 and 1:3, respectively, in a Battenfeld-type casting machine at a temperature of 180 to 200C, and casted and pressed articles were made ', ~.
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106~77 from the diluted mixtures. The tensile strength of the product prepared from the mixture with a dilution ratio of 1:3 (i.e. containing 18% of silicium di-oxide) was 253 kg./cm ., while that of the product prepared from the mixture with a dilution ratio of 1:1 ~i.e. containing 36% by weight of filling agent) was 333 kg./cm2., and thus it exceeded the tensile strength of pure poly-propylene (320 kg./cm2.).
The mixtures diluted with polypropylene in the ratios as given above were orientable. The stretching was carried out on an Instron equipment at 140C with a fixation length of 2.5 cm. and a deformation speed of 2 cm./min.
One migh~ expect that, owing to the presence of filling agent, the samples can be stretched only to a certain limit ~about 20 to 30%). On the contrary, - the yield point values, determined from the strength-elongation curves, de-creased by 70 to 80% in comparison with that of the pure polypropylene, de-spite of the filling agent content: i.e. the yield point of the pure poly- -propylene was 160 kg./cm2., while that of the disperse compounded systems diluted as given above were 38, 26, and 30 kg./cm2., respectively, in the order of decreasing filling agent content.
The strength examinations of the samples prepared with a stretching ratio of 1:8 showed results similar in tendency to those of the non-oriented samples. ~or samples containing 36% by weight of silicium dioxide the bend-ing work was 116 g.cm., and the elastic regeneration ability was 89%, while t~e same values for pure polypropylene were 102 g.cm. and 85%., respectively.
These results are in contrast with the known data of the literature, according to which the strength of polyolefines should decrease and their ~ rigidity should increase with increasing amounts of the admixed filling agent.
`- The insulating resistance of the thus-obtained compounded disperse system containing 36% by weight of silicium dioxide, measured at 100, 200, - and 1000 V., respectively, was identical with ti.e. 10l3 ohm.cm.), while that of the disperse system containing 18% by weight of silicium dioxide was higher than (i.e. ~ 1013 ohm.cm.) that of polypropylene ~1013 ohm.cm.).

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50~7'7 The loss factors ~tg.~l measured at 1 MHz and 1 KH~, respectively, were always identical with those of the pure polypropylene (5 to 7 x 10 at 1 MHz; 0 at 1 KHz). The dielectric constant of the mixture containing 18%
by weight of silicium dioxide was the same (9) while that of the mixture con-taining 36% of silicium dioxide was higher (11.3) than that of the pure poly-propylene (9.5). ~The dielectric constants were measured at 1 KHz.) Conse-quently, these substances can be utilized with good results as insulators.
As a comparison it should be mentioned that the insulating resistance of the commercial china insulator is 1012 ohm. cm., its loss factor is 10 2, while its dielectric constant is 6 to 7, measured under identical conditions.
Example 2 A homogeneous mixture was prepared from 36% by weight of crystalline polypropylene, 48% by weight of polyisobutylene ~average molecular weight:
1.5 x 106), 5% by weight of an oxyethylated laurylalcohol based tenside con-taining in average three ethyleneoxide groups per molecule ~HLB value: 10) and 5% by weight of colloidal silicic acid ~specific surface area: 175 m ./g.
average particle size: 10 to 40 ~m., bulk density: 40 g./l.) in a Banbury mixer at a temperature of 140 to 158C, with a stirring time of 11 minutesJ
under the following mixing parameters: speed of stirrer: 100 r.p.m., forced draft pressure: 4.3 atm., tension: 5.5 atm. The current uptake of the system at stirring was 2 A, 4 A and 3 A, respectively, in comparison with the values of 7 A, 10 A and 3 A, respectively, measured for polypropylene under identical ~ -stirrlng conditions.
The obtained master batch was processed and examined as discussed in Example 1.
Similarly to the results reported in Example 1, strength properties essentially identical with those of polypropylene both in oriented and in non-oriented state were obtained for the substance with the highest filling agent, tenside and polyisobutylene contents. The tensile strengths of the non-oriented and oriented polymer systems prepared with a 1:1 dilution of the , - , . .. : . : :

master batch were 330 kg./cm2. and 3745 kg./cm2., respectively (this latter value ~as obtained in the direction of stretching at a stretching ratio of 1:8). The corresponding values for pure polypropylene were 320 and 3840 kg./cm ., respectively. In this case, too, the yield point values determin-able from the strength-elongation curves decreased to a great extent ~by about 80%) in comparison with those of polypropylene for all the three dilu-tions.
The system obtained with a dilution rate of 1:1 is substantially more flexible and has essentially better flexible regeneration ability than pure polypropylene. The bending work decreased to 85 g.cm., in comparison with the value of 102 g.cm. measured for pure polypropylene, and the flexible regeneration ability was 92%, in comparison with the value of 85% measured for pure polypropylene.
In none of the cases were the electric insulating properties worse than those o pure polypropylene. For mixtures with a dilution rate of 1:1 or 1:3, respectively, the insulation resistance was the same, while for mix-tures with a dilution rate of 1:2 this value was greater than that of pure polypropylene ~1013 ohm.cm., and ? 1.3 x 1013 ohm.cm., respectively). The loss factor ~tg ~) was the same as for pure polypropylene (5 to 6 x 10 4 at 1 MHZ7 and 0 at 1 KHz). The dielectric constant was lower than that of pure polypropylene for all the three diluted systems.
The fibres prepared from the diluted systems by orientation fibre protuction were well dyeable with dispersion and basic dyestuffs.
Example 3 A mixture consisting of 90 parts by weight of quarz flour, 10 parts by weight of crystalline polypropylene and 10 parts by weight of polyisobutyl-ene (average molecular weight: 1.5 x 10 ) was stirred for 6 minutes in a Banbury-type mixer. The parameters of mixing were the same as indicated in Example 1. A compounded system could not be prepared from these substances;
the individual components were immiscible with each other.

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10t~ 7 ~' When adding 0.5 parts by weight of an alkylaryl sulfonate (anionic tenside) with a HLB value of 2 to the mixture the homogenization process started, the polypropylene melted, and the filling agent got dispersed in this melt. Thus a compounded system was formed from the four components.
The current uptake at stirring amounted initially to 2 A, then increased to 3 A, and finally decreased again to 2 A.
This product, when ignited at 1500C, yields a dielectric applicable at high frequencies.
Example 4 One proceeded essentially as described in Example 3 with the dif-ference that the dispersion process was started with 1 part by weight of a fatty acid mixture based cationic tenside with a HLB value of 9. The current uptake at stirring was initially 2 A, then increased to 3 A, and finally de-creased again to 2 A.
The properties of the obtained product were the same as t'nose given in Example 3. -~
Example 5 A mixture consisting of 90 parts by weight of ceramic dielectric powder (5% by weight of BaCO3, 83% by weight of talc and 12% by weight of clay; particle size- 0.3 to 300 ~m.), 10 parts by weight of crystalline poly-propylene and 10 parts by weight of polyisobutylene (average molecular weight:
1.5 x 105) uas mixed in the way as described in Example 3 but the system could not be homogenized.
The dispersion process could be started with a mixture of 1.5 parts by weight of an acryl-aryl sulfonate ~anionic tenside; HLB-value = 2) and 2 parts by weight of a fatty acid polyglycol ester (non-ionic tenside; HLB- -- value = 9), and thus a compounded system was prepared.
- The obtained product was well castable and extrudable.
Example 6 - ;
A mixture consisting of 74.16% by weight of crystalline polypropyl-. .
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lOtiS07~7 ene, 20% ~y weight of kaoline (particle size: 0.3 to 300 um.), 1,46% by weight of polyisobutylene ~average molecular weight: 3 x 104), 1.46% by weight of polyisobutylene (average molecular weight: 1.5 x 10 ), 1.46% by weight of a ~atty alcohol containing 3 ethyleneoxide groups per molecule ~HLB value: 10~, and 1.46% by weight of a fattty acid-polyamine based non-ionic tenside (HLB value: 1) was homogenized in a Battenfeld-type casting machine at 180 to 200C. Sheets were pressed from the obtained compounded system at an etage press at 170C, with a pressure of 120 kg./cm2. Samples of 25 mm. length and 4 mm. width were cut from these sheets, and the strength properties of these samples were examined both in oriented and in non-oriented states. Stretching was performed as described in Example 1. In non-oriented state the tensile strength was 336 kg./cm2. and the elongation at rupture was 15.3%, while the respective values in oriented state were 2885 kg./cm2. and 28.25%, respectively. The non-oriented polypropylene had a tensile strength of 320 kg./cm2. and an elongation at rupture of 10%, while the respective values of the oriented polypropylene were 3840 kg./cm . and 12.5%, respectively.
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` Example 7 A mixture consisting of 98.5% by weight of crystalline polypropyl-ene, 0.5% by weight of polyisobutylene ~average molecular weight: 3 x 104), 0.5% by weight of lauryl alcohol containing 3 ethyleneoxide groups per molecule ~HLB-value: 9) and 0.5% by weight of silicium dioxide (particle size: 0.3 to 300 ~m.) was homogenized as described in Example 1. The current uptake at stirring was 2.4 A, 4 A and 3 A, respectively, as a function of the ~tirring time.
- Sheets were pressed from the obtained compounded system and the mechanical properties of the obtained sheets were examined. The tensile ~- strength was the same as for polypropylene, while the elongation at rupture increased to a great extent (from 11% to 32%).

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Example 8 A mixture consisting of 73% by weight of crystalline polypropylene, 12.5% by weight of high-pressure polyethylene, 12.5% by weight of low-pressure polyethylene, 0.5% by weight of laurylalcohol containing 3 ethyleneoxide groups per molecule ~HLB value: 10), 0.5% by weight of polyisobutylene (average molecular weight: 3 x 10 ) and 1% by weight of silicium dioxide ~particle size: 0.3 to 300 ~m.) was homogenized as described in Example 1.
The examinations were carried out as indicated in Example 7. The tensile strength of the obtained system was identical with that of polypropylene, while the elongation at rupture increased to a great extent ~from 11% to 30%).
Example 9 A mixture consisting of 4% by weight of crystalline polypropylene, 11% by weight of polyisobutylene (average molecular weight: 1.5 x 105), 3%
br weight of polyiso~utylene ~average molecular weight: 1.5 X 106), 0.5% by weight of laurylalcohol containing 3 ethyleneoxide groups per molecular (HLB
value: 10), 0.5% by weight of a fatty acid-polyamine ~HLB value: 2) and 81%
by weight of a ceramic dielectTic powder ~5% by weight of barium carbonate, ` 83% by weight of talc and 12% by weight o clay) was homogenized as described in Example l. The current uptake at stirring was l A, 2 A and 2 A, respective-ly, as a function of the time of stirring.
A well castable and extrusable compounded system was obtained.
Example 10 A master batch was prepared from 10% by weight of atactic poly-propy~lene, 49% by weight of crystalline polypropylene, 40% by weight of ignited china talc and 1% by weight of nonylphenol polyglycolether (non-ionic tenside) as described in Example 1. The obtained master batch was diluted with polypropylene in a ratio of 1:1 as described in Example 1, and casted and pressed articles were prepared from the diluted mixture. The tensile strength of the obtained products was 323 kg./cm ., their elongation at rupture was 76.1%.
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~06~177 Example 11 A master batch was prepared from 49% by weight of crystalline poly-butene-l, 10% by weight of polyisobutylene (average molecular weight: 3 x 103), 40% by weight of ignited china ~alc and 1% by weight of ammonium butylnaph-thalene sulfonate (anionic tenside) as described in Example 1, but at a mix-ing temperature of 140C. The obtained master batch was diluted with poly-propylene in a ratio of 1:1, as described in Example 1. Casted and pressed articles were produced from the diluted mixture. The tensile strength of the obtained products was 330 kg./cm2., their elongation at rupture was 60%.
Example 12 A compounded plastic system was prepared from 40% by weight of crystalline polypropylene, 10% by weight of polyisobutylene ~average mole-cular weight: 3 x 103), 4% by weight of polyisobutylene (average molecular ` weight: 1.5 x 10 ), 7% by weight of polyisobutylene (a~erage molecular weight: 1.5 x 106), 28% by weight of china talc, 10% by weight of polyamide Ca copolymerization product of caprolactam and lauryllactam, melting in a range of 130 - 140C), and 1% by weight of a cationic tenside (formate salt o~ triethanolamine esterified with a C16 fatty acid) as described in Example 1. Fibrillated fibres were produced from this system under the following parameters: extrusion temperature: 180, 210 and 220C, respectively, stretch-ing temperature: 100C, stretching ratio: 1:10, speed of the fibrillating roll: 400 r.p.m. The bending~work of the fibrillated fibre was 1.1 g.cm./
100 den., the angle of elastic regeneration was 55 in the 0th minute and -~; 110 in the 15th minute, in comparison with the bending work of 1.38 g.cm./
- lQ00 den. and the angles of 42.7 and 89.3 measured for polypropylene.
Thus, a far softer and more elastic fibre could be produced from the com-pounded plastic system according to the in~ention than from polypropylene.
Example 13 A compounded plastic system was prepared from 54% by weight of crystalline polyprop~lene, 5% by weight of styrene-acrylonitrile copolymer, ~ .
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10~5()77 10% by weight of polyisobutylene ~average molecular weight: 3.8 x 105), 30%
by weight of r-Ee203 and 1% by weight of polyethyleneoxide sorbitan fatty acid ester ~non-ionic tenside) as described in Example 6. The obtained mix-ture was processed as indicated in Example 6. The tensile strength of the obtained products was 300 kg./cm .~ while their elongation at rupture was 30%.
Example 14 A mixture consisting of 35% by weight of aluminium powder, 54% by weight of crystalline polypropylene ~melt index: 9 g./10 min.), 10% by weight of polyisobutylene (average molecular weight: 1.5 x 106) and 1% by weight of sulfated laurylalcohol ~anionic tenside) was homogenized at a roller mill at 200 with a mixing time of lO min., and the obtained compounded plastic sys-tem was pressed into sheets within 3 min. at 200C with a pressure of lO0 kg./
cm2. The tensile strength of the obtained sheets was 300 kg./cm2., their elongation at rupture was 410%. The system was conductive at 20V and at 800 Hz, thus the electric conductivity of polypropylene improved in the compounded plastic system according to the invention.
Example 15 A master batch was prepared from 60% by weight of bentonite, 10%
b~ ~eight of polyisobutylene ~average molecular weight: 3.8 x 105), 29% by welght of crystalline polypropylene (melt index: 9 g./lO min.) and 1% by weight of cationactive fat liquor (cationic tenside) as described in Example 1. The obtained master batch was diluted with polypropylene in a ratio of 1:2 as described in Example 1, and a foil of 50 ~m. thickness was prepared from the diluted mixture. The tensile strength of the foil was identical with that made of polypropylene.
Example 16 A master batch was prepared from 32.3% by weight of crystalline -polypropylene, 55% by weight of rutile titanium dioxide and 2% by weight of laurylpyridinium sulfate ~cationic tenside) and 10.7% by weight of polyiso-;~ - 18 -. . ; , ~ . , . : - ~ .
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,: . -5Q~7~7 but~lene ~average molecular weight: 1.5 x 104) as described in Example 1.
The obtained master batch was diluted with polypropylene in a ratio of 1:1 as described in Example 1, and casted and pressed articles were prepared from the diluted mixture. Products being the same in strength as polypropylene but having an elongation at rupture of 35% were obtained.
Iron oxide red or iron oxide yellow can also be used as pigment instead of rutile titanium dioxide in the above mixture. The strength charac-teristics of the products obtained with these iron oxide pigments were the same as those of the above.

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Claims

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:

1. A compounded plastic system containing 3 to 99% by weight of a crystalline polyolefine, 0.4 to 80% by weight of a non-crystalline polyolefine and 0.5 to 95% by weight of a pigment and/or filling agent and optionally other polymers as well, characterized by containing at least 0.1% by weight of a tenside being heat-resistant up to at least 110°C.

2. A compounded plastic system as claimed in claim 1, characterized by containing 0.5 to 10% by weight of said tenside.

3. A process for the preparation of a compounded plastic system con-taining 3 to 99% by weight of a crystalline polyolefine, 0.4 to 80% by weight of a non-crystalline polyolefine and 0.5 to 95% by weight of a pigment and/or filling agent and optionally other polymers as well, by admixing the respec-tive components with each other, characterized in that the components are admixed with each other in the presence of at least 0.1% by weight of a ten-side being heat-resistant up to at least 110°C.

4. A process as Claimed in claim 3, characterized in that the components are admixed with each other in the presence of 0.5 to 10% by weight of the tenside.