CS212451B1 - Plastic composition - Google Patents

Description

The invention relates to a plastic composition comprising 3 to 99% by weight of crystalline polyolefins, 0.4 to 80% by weight of non-crystalline polyolefins and 0.5 to 95% by weight of pigment and / or filler, and optionally other polymers.

As is well known, inorganic fillers of mineral origin are frequently added to thermoplastic materials, such as polyolefins, for the purpose of imparting specific properties to these materials and for economic reasons. Among the fillers used, in particular, kaolin, bentonite, float chalk, as well as glass and asbestos fibers. As the proportion of added filler increases, the torsional modulus, Brinell hardness, torsional strength, shear modulus, specific weight, compressive strength, weldability, and polyolefin warping resistance increase. On the other hand, however, the tensile and flexural strength, the elongation and the impact flexural strength of polyolefins are greatly reduced. The decline in these four strengths results in considerable brittleness of the fillers, which can be attributed to the fact that the molten polymer is unable to seep through the filler particles, which are generally hydrophilic in nature. Reducing the melt index with the growth of the filler fraction indicates that the filler particles present in the molten polymers exert an adverse effect on their processability (see Kunststoff-Rundschau £ 2, 245 (1972); ICI Plastice Today £ 0, page 7 (1971)).

Some measures have been taken to reduce this poor compatibility between polymer melts and fillers. For example, some clay minerals have been made organophilic by utilizing their cation exchange properties. These organophilic fillers were then admixed with polyolefins (see U.S. Pat. No. 3,084,117).

The dyeing of polyolefins with basic dyes can be ensured by admixing the polyolefins with organophilic clay minerals (see Modem Textiles 12, 22 (1971)) or colloidal silicic acid (see DE 1 469 818). The difference in specific gravity results in further disadvantages if the addition of these fillers - even after their organophilic pretreatment - to the polymer melt amounts to more than 5% by weight. In this case, the polymer granulate needs to be homogenized with a portion of the filler in an intermittent mixing operation, and another portion of filler (exceeding 5%) is added to the polymer only after this premixing.

Another disadvantage of the filler-containing compositions is that the admixed fillers have an effect on the physical and mechanical properties of the resulting product and that the admixture of fillers is quite limited.

It is also known that the resistance of polyolefins to low temperatures and to electrical stress corrosion can be increased by the addition of polyisobutylene (see Kunststoffe 62, 610 (1972); U.S. Pat. No. 2,993,028). Apart from the relative cost of preparing polyisobutylene, this process has the disadvantage that this treatment adversely affects the mechanical properties of the final product.

It is an object of the present invention to provide a plastic composition comprising crystalline and non-crystalline polyolefin which retains the properties of the starting polymer composition even after admixture of widely varying proportions of fillers and which in some respects has even better properties than said starting composition.

The invention is based on the discovery that certain properties, in particular dyeability, electrical conductivity and castability of plastic compositions containing crystalline and non-crystalline polyolefin can be improved even after adding a substantial proportion of filler to the composition when the filler is admixed to the plastic composition in the presence of special surfactants.

This finding is very surprising, since it has been known that the admixture of fillers with crystalline polyolefins both deteriorates their mechanical properties and that, due to the strong plasticizing effect of non-crystalline polyolefins, the crystallinity of the crystalline polyolefin decreases. Thus, when these two substances are added to the crystalline polyolefin, both the mechanical properties and the degree of orientation are impaired.

As a result, it would be expected that the plastic composition of the present invention will also have said deteriorated properties. Against this assumption, however, the compositions of the invention are orientable in the same way as pure crystalline polyolefins and also have the properties of crystalline polyolefins. In addition, these products can also be prepared by the methods used in the treatment of amorphous polymers.

Further, the invention is based on the discovery that high proportions of fillers having any crystalline structure, possibly morphological properties or any polarity can be added to the composition in the presence of special surfactants.

The present invention provides a plastic composition comprising 3 to 99% by weight of crystalline polyolefin, 0.4 to 80% by weight of non-crystalline polyolefin and 0.5 to 95% by weight of pigment and / or filler, and possibly other polymers, characterized in that > 0.1% to 10% by weight of heat-resistant anionic, cationic or non-ionic surfactants up to a temperature of at least 110 ° C.

The plastic composition preferably comprises 0.5 to 5% by weight of surfactants.

The components are mixed together at a temperature above the melting point of the crystalline polyolefin, e.g. Thus, the pigment and / or filler and the surfactant are added either separately or mixed together to form a crystalline and non-crystalline polyolefin.

Any apparatus conventional in the plastics industry can be used in the preparation of the plastic composition. Preferably, the starting materials are converted into a masterbatch granulate, which can then be diluted with polyolefins or other thermoplastic polymers in a proportion to the particular purpose of use. Castings, extruded, calendered and the like can be produced from these materials obtained after dilution of the pre-blend granules. products, including fibers, all of which are highly colorable. If, for example, kaolin or montmorillonite is used as an additive, the extruded fibers are dyed with disperse and basic dyes, while using starch, cellulose or polyvinyl alcohol as additives, fibers dyeable with reactive or direct dyes are obtained.

The properties of the plastic compositions of the present invention can be largely pre-tailored to the requirements of the various uses by varying the quantitative ratios of the blended components. For example, if the filler content is increased up to 40% by weight, the tensile strength is increased. If quartz flour is added in an amount of 36% by weight, optimum mechanical properties can be achieved. Cast products can even be produced by admixing up to 82% by weight of ceramic dielectric dust consisting of alumina, barium carbonate and titanium dioxide to the molten polymer. These cast products can be used unburned or baked.

In particular, polyethylene or isotactic polypropylene can be used as the crystalline polyolefin, while polyisobutylene can preferably be used as the non-crystalline polyolefin.

Pigments which can be used in the products of the invention include rutile (titanium dioxide), zinc oxide, phthalocyanine blue, phthalocyanine green, and cadmium sulfide.

With regard to fillers admixed to the molten polymer composition, for example, kaolin, talc, bentonite, zinc oxide, alumina, ceramic dielectric dust, silica flour, powdered aluminum, graphite, glass fibers, asbestos, powdered cement, silica, colloidal silicic acid, float chalk, sawdust and bitumen.

Polystyrene, polyamide, polyethylene glycol, copolymers of styrene and acrylonitrile, starch, polyvinyl alcohol and cellulose can be used as polymeric additives.

Nonionic, cationic and anionic surfactants can also be selected depending on the intended use of the product and the nature of the polyolefin and other polymers as well as the pigments and fillers used.

Suitable nonionic surfactants are, in particular, alkyl polyglycol ether acetates, fatty acids, polyethylene glycol esters, phenol polyglycol ethers, and condensates of fatty acid polyamines with fatty alcohols containing at least three ethylene oxide groups per molecule (diethylenetriamides of fatty acids).

Among the cationic surfactants, for example, ethyl pyridinium salts, cetyltrimethylammonium bromide, dilauryldimethylammonium bromide, stearyldimethylbenzylammonium chloride and cationic fatty substances can be used.

Finally, suitable anionic surfactants for use herein are: p-toluenesulfonic acid, sodium dodecylbenzenesulfonate, alkylarylsulfonates, aliphatic sulfuric esters, sodium alkylsulfonates, sulfonated alkylnaphthyl ethers, and sodium salts of sulfonated mineral oils.

The plastic compositions of the present invention can be used for a variety of purposes. For example, castings for pumps and mixers, fan blades, fuse bodies, tubes, parts for lighting systems, electrical insulating materials, furniture parts, components of the high-frequency telecommunication system4, foils, fissile foils, monofilament yarns, etc., by conventional pressing, casting, die casting or extrusion.

The main advantages of the plastic compositions as well as the process for their preparation according to the invention are:

a) the ductility of the product does not decrease even with a high filler content, and even tensile strength increases up to 40% by weight. filler content;

(b) the product is orientable regardless of the filler content;

o) compositions that are much more flexible than the crystalline starting polyolefins can be prepared;

d) fillers of any polarity may be used;

e) the processability, eg the castability of the composition does not change compared to the starting polyolefin;

f) the additional dyeability of the polyolefin starting material can be improved;

(g) the compatibility of polymers and polyolefins which were initially incompatible with one another may be increased;

(h) the products may be used at temperatures much higher than those permissible for the use of normal polyvinyl chloride, even under sustained loading;

(i) the product is impact-resistant and, in contrast to the very expensive impact-resistant polyvinyl chloride and polystyrene, retains advantageous mechanical properties for virtually unlimited time.

The invention is further described in detail in several examples, which are not intended to limit the scope of the invention in any way.

The HLB value used in the examples in relation to surfactants indicates the degree of their dispersibility in water, the HLB value of the surfactant which provides a clear solution with water is given by 13, whereas for the surfactant which cannot be dispersed in water at all this value is 1 (see Griffin, VC, Official Digest Federation of Paint and Varnish Production Clubs, 28, 466 (1965)).

He did

A premix of 11 wt. % crystalline polypropylene (melt index: 2.5 measured at 230 ° C under a load of 2.16 kg), wt. % polyisobutylene (avg. mol. weight: 3 x 10 ^),% wt. % polyisobutylene (avg. mol., weight: 1.5 x 10 ^),% by weight, polyamine fatty acid surfactant (HLB value = 1),% by weight; % surfactant based on oxyethylated lauryl alcohol containing three ethylene oxide groups per molecule (HLB value = 10); of silicon dioxide (particle size: 0.3 to 100 µm) on a counter-kneading machine (Banbury). Kneading was performed for 1 minute at the following technical parameters: kneader speed: 105 rpm; forced draft pressure: 4.3 at; tension: 5.5 at. The rheological process of kneading the dispersion melt of the composition in the kneader showed considerable surfactant activity despite a relatively high filler content. The current intensity was 2A at the beginning of the kneading, then increased to 4A (depending on the kneading time function) and again decreased to 3A at the end of the process. For polypropylene, these values were 7A, 10A?

3A. This approx. A 70% reduction in the required electric current intensity demonstrates the rheologically beneficial effect of the surfactant which is manifested in the melt.

The masterbatch thus obtained was diluted with polypropylene in ratios of 1: 1, 1: 2, respectively. 1: 3 in a Battenfeld casting machine at a temperature of 180 to 200 ° C. Molded and pressed articles were then made from the diluted mixtures. The tensile strength of the product prepared from the 1: 3 mixture (i.e. containing 18% silica) was 253 kg / cm ² , while the product from the 1: 1 mixture (i.e. 36% % of the filler) was 333 kg per cm @ ² , i. increase over tensile strength of pure propylene of 320 kg / cm ² .

Mixtures diluted with polypropylene in the proportions indicated could be oriented. Serving, respectively. stretching was performed on an Instron at 140 ° C at a fixation length of 2.5 cm and a strain rate of 2 om / min. Due to the presence of a filler, it would be expected that samples of the product could only be stretched to a certain limit (approx. 20 to 30%). On the other hand, the yield strength values determined by the strength / elongation ratio decreased by 70-80% compared to the values found for pure polypropylene despite the filler content: while for pure polypropylene the yield strength was 160 kg / cm 2, The dispersion compositions described above measured values of 38, 26 and 30 kg / cm @ 2, the variations of which corresponded to a corresponding reduction in the filler content.

The results of strength tests performed on 1: 8 elongated specimens showed a similar pattern to that of non-oriented specimens. For samples containing 36 wt. The silica bending stress was 116 g.cm and the recovery (shape memory) was 89%, while the values of pure polypropylene were 102 g.cm, respectively. 85%.

These results are in contradiction with the data known in the literature, according to which the solid-polyolefins should decrease and the stiffness increase in proportion to the increase in the proportion of admixed filler.

Insulation resistance of the thus obtained dispersion composition containing 36 wt. of silica measured at 100, 200, resp. 1000 V, was identical (i.e. 1θ'3 ohm.cm) to the polypropylene resistance, whereas for a dispersion composition containing 18 wt. higher resistance was measured.

Loss factors (tg 5) measured at 1 MHz resp. In both cases, 1 KHz were identical to those found with pure polypropylene (5 to 7 x 10 * at 1 MHz; 0 at 1 KHz). The dielectric constant of a mixture containing 18 wt. silicon dioxide was also (9), whereas for a 36 wt. silica was higher (11.3) than found with pure polypropylene (9.5). (Dielectric constants were measured at a frequency of 1 KHz.) As a result, these substances are suitable for 8 good results as insulators. By comparison, the insulation resistance of a conventional commercial porcelain insulator is 10 > ² ohm.cm, with a loss factor of 10 ^-2 , while its dielectric constant measured under the same conditions is 6-7.

Example 2

A homogeneous mixture containing 36 wt. % crystalline polypropylene, wt. % polyisobutylene (avg. mol. weight: 1.5 x 10 4), 5 wt. an oxyethylated lauryl alcohol based surfactant containing on average three ethylene oxide groups per molecule (HLB-10 value) and 5 wt. colloidal silicic acid (specific surface area: 175 m @ 2 / g; average particle size: 10 to 40 .mu.m; bulk weight: 40 g / l) in a counter-kneading machine (Banbury) at 140-158 ° C. Kneading lasted 11 minutes and was performed at these

212451 ⁶ technical parameters; kneader speed: 10Q rpm, forced draft: 4.3 at. The intensity of the kneading current was 2A, 4A, respectively. 3A compared to the intensity of 7A, 10A, respectively. 3A measured during polypropylene processing under identical kneading conditions.

The pre-obtained was processed and tested in the same manner as in Example 1.

Similar to the results described in Example 1, strength values essentially identical to those of polypropylene were obtained, both in the oriented and in the non-oriented state, with the highest filler, surfactant and polyisobutylene content. The tensile strength of the non-oriented and oriented polymer composition prepared with a 1: 1 diluted premix was 330 kg / cm ² , respectively. 3,745 kg / cm < ^{2 >} (the second value was obtained in the elongation direction at an elongation ratio of i: 8). The corresponding values measured for pure polypropylene were 320 _? reep. 3,840 kg / cm ² . In this case, too, the yield strength values determined by the strength / elongation relationship dropped to a considerable extent. 80% as compared to the polypropylene values for all of these ratios.

-Sk

The composition obtained at a dilution ratio of 1: 1 is substantially more flexible! and exhibits a substantially better bending recovery capability than pure polypropylene. The flexural stress decreased to 85 g.cm compared to a value of 102 g.cm, measured of pure polypropylene, with a bend recovery (shape memory) of 92% compared to S5% measured with pure polypropylene.

In none of the above cases, the electrical insulation properties of the composition were not hot! than pure polypropylene. For 1: 1 or 1: 3 dilutions, the insulation resistance was the same, while for 1: 2 dilutions, the insulation resistance was higher (i.e. 1.3 χ 10 ^-3 efc. Cm versus 10 ³ ohm). cm for pure polypropylene). The loss factor (tg < 5) was the same as that of pure polypropylene (i.e. 5 to 6 x 10 < ^{4 >} at 11 Hz and 0 at 1 KHz). The dielectric constant was lower than that of pure polypropylene for all three dilution ratios.

Fibers made from dilute compositions and oriented by elongation could be dyed with disperse and basic dyes.

Example 3

90 wt. parts of quartz flour, 10 wt. parts of crystalline polypropylene and 10 wt. parts of polyisobutylene (average molecular weight: 1.5 and 10 [mu] m) were kneaded for 6 minutes in a Benbury kneader at the same technical parameters as described in Example 1. It was not possible to prepare the composition from the components as they were shown to be together immiscible.

After addition of 0.5 wt. An HLB equal to 2 parts of an alkylarylsulfonate (i.e. anionic surfactant) of 2 has started a homogenization process in which the polypropylene is melted and the filler dispersed in the melt. Thus, a composition was prepared from the four components. The intensity of the kneading current was initially 2A, then increased to 3A and eventually dropped again to 2A.

This prolonged firing at 1500 ° C gave a dielectric usable at high frequencies.

to

Example

The procedure of Example 3 was followed, except that the dispersion process was initiated by the addition of 1 wt. % of a cationic surfactant based on a mixture of fatty acids (HLB value = 9). The intensity of the kneading current was initially 2A, then increased to 3A and finally decreased again to 2A.

The properties of the product obtained were identical to those of the product described in Example 3.

Example 5

90 wt. parts of ceramic dielectric dust (5 wt.% barium carbonate, 83 wt.% talc and 12 wt.% clay; particle size: 0.3 to 300 µm); parts of crystalline polypropylene and 10 wt. parts of polyisobutylene (avg. mol.) of immunity: ‘‘ 5, 5 x 10 Ó> was kneaded in the descriptive γ of Example 3, but homogenization was not achieved.

The dispersion process was initiated with a 1.5 wt. parts by weight of acryarylsulfonal (anionic surfactant; HLB value of 2) and 2 wt. parts of a polyglycol ester of a fatty acid (non-ionic surfactant; HLB > 9), thereby finally obtaining a composition. . ,. ,

IN",.' -, y Ϊ. · -A, ^ř i

The product obtained was well castable and extrudable.

Example 6

% Blend of 74.16 wt. % crystalline polypropylene, 20 wt. kaolin (particle size: 0.3 to 300 pa), 1.46% by weight of polyisobutylene. (ave. ,, ^ ^ mgl otposti 3 Y ⁴ 10), 1.46% by weight. % of a fatty alcohol containing 3 ethylene oxide groups of the 7th molecule (ALB 10 value) and 1.46 wt. nonionic surfactant based on polyamine. fatty acids (HLB value = 1) were homogenized in a Battenfeld casting machine at a temperature of 180 to 200 ° C. That the obtained compositions were compressed on a multi-deck press at 170 ° C under a pressure of 120 kg / cm ² . Samples of 25 χ 4 mm were cut from the formations and the strength values in the oriented and undirected state were accumulated. Stretching was performed as described in Example i. In the undirected specimens, Si ila, tensile strength 33.6, "Xg / µm? and ductility 15.3%, while values in the oriented state were found to be 2,885 kg / cm ^2, respectively. 28, 25%.,

For comparison, the tensile strength of the unoriented polypropylene was 320 kg / cm @ 2 and the elongation at break was 10%, while for the oriented polypropylene 3840 kg / cm @ 2 and 100 kg / cm @ 2 respectively. j.2,5. % · .- ,,

Example?

Mixture containing 98.5 wt. % crystalline polypropylene, 0.5 wt. polyisobutylene. sáol. 3 × 15-4, -0 »5« wt. InuryiaKKXsl ^^^ beah ^ B ^^ ethylene oxide _8kv pin per molecule (HLB value *) and 0.5 wt. Sash oxide _«} aišitifee and size, particle \ ^Λ» 3 <* 300 Pa) was homogenized as described in příkkádu 1, ii.; liitenzite 'electric p.' ^ P ^{here of limbs} and kneading was 2.4 ^A,; 4A, reSp <3A according to time function. kneading / ,,. ⁱ , _ir .j

From _zi ' «Cana composition were pressed sheets, and then examined their mechanical Propert Ké * · Tensile strength was the same as for the polypropylene, while the elongation showed considerable · not increased (from ^{1' to} &%) · - t

He does

73% wt. crystalline polypropylene. 12.5 wt. % high pressure polyethylene, 12.5 wt. % of low pressure poxyl polyethylene, b ', 5 wt. % of lauryl alcohol containing 3% ethylenedide groups per molecule (.beta.LB = 10). % of polyisobutylene, (avg. · mol. weight: 3 χ 10 ⁴ ) and 1 wt. silicon dioxide. (size částlwř: IO ^ t to júójumŤiúyia homogenized as indicated in the first pít.'ladu Pr ^ uct was tested 'mentioned? in Example 7. The tensile strength was obtained kompezice ^you 3NA such as polypropylene, while the elongation was found considerably higher (30% vs 11%).

Example 9

Mixture of 4% by weight. % crystalline polypropylene, 11 wt. % polyisobutylene (avg. mol. weight: 1.5 x 10 4), 3 wt. % polyisobutylene (avg. mol. weight: 1.5 xx 10 ⁶ ), 0.5 wt. % of lauryl alcohol containing 3 ethylene oxide groups per molecule (HLB value = 10), 0.5 wt. % polyamine fatty acid (HLB value = 2) and 81 wt. Ceramic dielectric dust (5 wt.% barium carbonate, 83 wt.% talc and 12 wt.% clay) was homogenized as described in Example 1. The electric current intensity showed, depending on the function of the lattice time, 1A, 2A and

A well-castable and extrudable composition was obtained.

Example 10

A premix of 10 wt. atactic polypropylene, 49 wt. % crystalline polypropylene, 40 wt. % of kaolin talc and 1 wt. nonylphenol polyglycol ether (non-ionic surfactant) as described in Example 1. The premix thus prepared was diluted 1: 1 with polypropylene as described in Example 1, and cast and pressed articles were made from the diluted composition. The tensile strength of the products obtained was 323 kg / cm ² , the ductility was 76.1%.

They did

A premix of 49 wt. % crystalline polybutene-1, 10 wt. polyisobutylene (avg. mol. weight: 3 x 10-3), 40% by weight; % of kaolin talc and 1 wt. butylnaphthalenammonium sulfonate (anionic surfactant) as described in Example 1, but at 140 ° C. The obtained premix was diluted 1: 1 with polypropylene as described in Example 1. Molded and pressed articles were made from the diluted composition. The tensile strength of the products obtained was 330 kg / cm ² and the elongation at break was 60%.

Example 12

The plastic composition was prepared from 40 wt. % crystalline polypropylene, 10 wt.%, polyisobutylene (average mol. weight: 3 x 10?), 4 wt. % polyisobutylene (avg. mol. weight: 1.5 x 10 4), 7 wt. % polyisobutylene (avg. mol. weight: 1.5 x 10 ⁶ ), 28 wt. % kaolin talc, 10 wt. % polyamide (copolymer of caprolactam and lauryllactam; m.p. 130-140 ° C); a cationic surfactant (formulated with triethanolamine esterified with a fatty acid β 16 carbon atoms) as described in Example 1. Fibrillated fibers were produced from the obtained composition at the following technical parameters:

extrusion temperatures: 180, 210, resp. 220 [deg.] C .;

elongation temperature: 100 ° C;

stretch ratio: 1:10} fibrillation roller speed: 400 rpm.

The bending stress of the fibrillated fiber was 1.1 g.cm/100 day, the elastic recovery angle was 55 ° at zero minute and 110 ° at 15 minute, while the bending stress for polypropylene was 1.38 g.cm/1000 day and the elastic recovery angles were measured at 42.7 ° and 42.7 ° respectively. 89.3 °. Thus, a much softer and more flexible fiber was obtained from the inventive composition than from polypropylene.

řříkledU

The plastic composition was prepared from 54 wt. % crystalline polypropylene, 5 wt. % styrene / acrylonitrile copolymer, 10 wt. % polyisobutylene (primary mol. weight: 3.8 x 10 6), 30 wt. % of Fe ₂ O 3 and 1 wt. a polyethylene oxide sorbitan fatty acid ester (non-ionic surfactant) as described in Example 6. The obtained composition was processed as described in Example 6. The tensile strength of the products obtained was 300 kg / cm ² , elongation 30%.

Example 14

Mixture of 35 wt. % aluminum powder, 54 wt. % crystalline polypropylene (melt index: 9 g / 10 min), 10 wt. % polyisobutylene (avg. mol. weight: 1.5 x 10 ®) and 1 wt. of the sulfated lauryl alcohol (anionic surfactant) was homogenized for 10 minutes in a roller mill at 200 ° C. The obtained plastic composition was compressed into sheets at 200 ° C under a pressure of 100 kg / cm ^{2 for} 3 minutes. The tensile strength of the sheets produced was 300 kg / cm ² , and the elongation at break was 410%. The composition was conductive at a voltage of 20 V and a frequency of 800 Hz, so that the electrical conductivity of the polypropylene was increased in the plastic composition of the invention.

Example 15

A premix of 60 wt. % bentonite, 10 wt. % polyisobutylene (avg. mol. weight: 3.8 x 10 ^), 29 wt. % crystalline polypropylene (melt index: 9 g / 10 min) and 1 wt. a cationic fatty substance (cationic surfactant) as described in Example 1. The premix obtained was diluted 1: 2 with polypropylene, as described in Example 1, and a film of 50 µm thickness was produced therefrom. The tensile strength of this film was identical to that of an analogous polypropylene film.

Example 16

A premix of 32.3 wt. % crystalline polypropylene, 55 wt. % rutile (TiO ₂ ), 2 wt. % laurylpyridinium sulfate (cationic surfactant) and 10.7 wt. polylsobutylene (average molecular weight: 1.5 x 10 6) as described in Example 1. The obtained premix was diluted with polypropylene in a ratio of 1: 1 as described in Example 1, and cast and pressed articles were made therefrom. The products showed the same tensile strength as polypropylene, but their ductility was 35%.

In the composition described, ferric red or ferric yellow may be used as a pigment instead of rutile (TiOg). The strength values remain unchanged even after these pigment changes.

Claims (5)

Plastic compositions comprising 3 to 99% by weight of crystalline polyolefin, 0.4 to 80% by weight of non-crystalline polyolefin and 0.5 to 95% by weight of pigment and / or filler, optionally further polymers, characterized in that it contains 0.1% up to 10% by weight of a heat-resistant anionic, cationic or non-ionic surfactant up to a temperature of at least 1.0 ° C. 2. Plastic composition according to claim 1, characterized in that it contains 0.5 to 5% by weight of a surfactant. Plastic composition according to claim 1 or 2, characterized in that the anionic surfactant is an alkyl sulphate or an alkylarylsulphonate in which the alkyl group has 1 to 4 carbon atoms. Plastic composition according to claim 1 or 2, characterized in that it contains cationic nitrogen-containing compounds as cationic surfactant. Plastic composition according to claim 1 or 2, characterized in that the nonionic surfactant comprises alkyl polyglycol ethers, alkylaryl polyglycol ethers, acyl polyglycol ethers, fatty acid amide polyglycol ethers or polyols, the alkyl group of which contains 1 to 4 carbon atoms.