CS219653B1 - Polypropylene-based mixture with controllable orientation, stabilization or theological and crystalline properties - Google Patents

Abstract

The subject of the invention is a polypropylene-based mixture with controllable orientation, stabilization, optionally rheological properties and crystallinity. This mixture is prepared by adding to polypropylene a mixture of 0.1 to 0.5%, preferably 0.1 to 0.4% zinc stearate with 0.1 to 0.5, preferably 0.1 to 0.4% calcium stearate, optionally 0.1 to 0.3% stearic acid, all concentrations calculated per polymer, when mixing into powdered polypropylene before making pigment concentrates, preferably using a turbulent high-speed mixer. After good mechanical mixing of the polypropylene with the above-mentioned agents, as well as with easily or poorly dispersible pigments, optionally with other ingredients, the mixture is melted in an extruder and spun. In addition to the above-mentioned features of the subject invention, there are also other possible variants. The present invention can be used in the production of polypropylene fibers or silk, as well as in other shaped products, or in the synthesis of polypropylene for fiber and plastic purposes.

Description

3

BACKGROUND OF THE INVENTION The present invention relates to a controllable orientation-stabilizing polypropylene-based composition comprising small amounts of stearate and calcium stearate, and the like; stearic acid.

Polypropylene is used in many sectors of the national economy. Depending on the particular application of its products, various requirements are presented. It is important to improve and regulate the properties of polypropylene with additives in the process of product preparation for both broad and special applications. In this respect, there is now a number of washing machines and patents. However, their introduction of production is less successful and encounters burdens and, in particular, deterioration of tolerance, because larger amounts of additives are used. Multi-application is the use of small amounts of additives, whereby improvement and regulation of properties is possible. In the literature, including the patent, there is a lack of data on the modification and control of the present or more properties of polypropylene, such as the orientation, thermal stability, or fluidity and crystallinity of the small amounts of added substances as a mixture of zinc stearate with either stearate or stearic acid stearate. In the case of coarse-grained products and fibers, non-uniform structures are often observed. This heterogeneity of the structure of the science of discovering various types of microdefects that cause deviations in the properties of finished products reduces their reliability. Therefore, modifiers are added to provide a homogeneous structure across the material under investigation. This homogeneity of the structure is particularly desirable for higher titers, whereby a different structure between the intermediate surface and the center of the filament can be produced only by cooling. In other cases, it is desirable to suppress the nucleation effect of substances that are present in polypropylene and other polyolefins otherwise needed. From the point of view of the preparation of the final polypropylene fibers with better properties, the effort is to prepare an undrawn fiber with low orientation values and a degree of crystallinity, since this polymer system is good deformable. In many cases, this structure is difficult to achieve because of the technological conditions of preparation of unbroken fibers because they are systems! polypropylene, which Tahko crystallizes. In this! we will point out that many pigments and other additives have an undesirable effect on the polypropylene nucleation. A compromise between trying to get high and steady is required in the preparation of Structurally Stable and Sufficient Flexible Fibers and Films! orientation in which the mobility of the moles is reduced and the effort to obtain good elastic properties where the mobility of the molecules is increased. Solve this question only in systems with not too rigid, but not too stiff molecules. This solution helps to control the loose storage of polymer molecules - the regulation of amorphine-219653. Furthermore, it is known that of all polyolefin polypropylene it is least resistant to antioxidation and thermal destruction. Polymer sensitivity by oxidation is also influenced by other factors, including the product form. Important in the tomosmere is the surface to volume ratio of the product. Pretosize very sensitive fibers compared to compact polymer products in the block. Modification of the polypropylene as well as its mixture with pigments and other ingredients is an effective enhancement and acceleration of the processability of this polymer. Over the last 10-15 years, there has been a very limited number of washing machines that show an additional or lesser effect of micro-additions of individual substances to increase flowability by melting pure polyolefins.

The proposed polypropylene-based composition of the present invention is characterized in that, for 100 parts by weight of polypropylene, the content of 0.1 to 0.5 parts is preferably 0.1 to 0.4 parts of zinc stearate and 0.1 to 0.5 parts with the advantage of 0, 1 to 0.4 parts of calcium stearate, or 0.1 to 0.3 parts of stearic acid. In operating conditions, it is suitable to add the above mentioned agents to the powdered polypropylene prior to making the pigment concentrates advantageously using a turbolent mixer. It is furthermore possible to add the additive either before homogenization in the form of a granular concentrate prepared into a polypropylene powder, or as a pure substance or before polymer granulation. The mixing of the additive with polypropylene and its mixtures is tested in operating mixing devices under normal conditions. Next, melting and shaping. The orientation was determined by optical birefringence and the degree of crystallinity by the flotation method. The thermal stability of polypropylene was assessed from established degradability index values. The flux indexes were determined on a Gotfert plastomer sheet.

According to the present invention, the obstruction of small amounts of substances can be improved and regulated according to the overall orientation, thermal stability or rheology and crystallinity needs of the polypropylene. Such agents are zinc stearate with either calcium stearate or stearic acid. with the difference in polarity and polarizability, as well as with the polymer substrate, in order to improve and control the two or more desirable properties of the polypropylene, such as general orientation, thermal stability, or melt flowability, and new crystallinity. The particular proportions of the small amounts of the above-mentioned additions in the blend to the polypropylene involve mutual interaction with each other, with the polymer, and optionally with the other polymer system components. As a result of this synergistic effect, new properties and higher efficiencies are obtained than the sum of the actions of the individual substances. The interdependence of the substances depending on their 4 and the concentration in the mixture can be varied or diminished, allowing the control of the aforementioned performance characteristics. practice. For example, when adding a mixture of 0.2 portions of zinc stearate with 0.2 µl calcium stearate or 0.1 µl zinc stearate with 0.1 part calcium stearate, the degree of crystallinity is reduced - Example 2, decreasing orientation and increasing with thermal | stability - examples 2 and 3 as both the polymer and its commonly used mixtures; 0.15 to 0.20 mixtures zinc stearate with 0.2 parts of stearic acid have a stabilizing effect on the polymeric composition - Example 1. In addition to the above-mentioned additive mixtures depending on the concentration of their constituents, the thermal stability, orientation, or crystallinity and fluidity can be gradually changed melt of polypropylene. According to the invention, it is possible to change the orientation and the degree of crystallinity of the pre-oriented fibers, which allows the hardness and elasticity to be controlled in the desired compromises. Further, in the presence of some of the abovementioned additives in polypropylene, structures having an increased heat-resistance may be obtained. Example

The efficacy of the combination of zinc stearate (A) with stearic acid (B) in a mixture I with granular and stabilized polypropylene brand Mošten 55.212 + 0.2 shares of titanium Bayer R-KB-2 + 0.2 parts of trilauryltrithi-folate was monitored. 1. The obtained values were compared with the values of other systems - taburek 1. Mosten55.212 was once ground on an Apex mill with a mesh diameter of 1.96 mm. Stirring of the mixture was carried out in a turbocharger TR-400 at 600 rpm for a period of 10 min. The mechanical stirring of the mixture of maltomers for 10 min was also satisfactory. The mixed sample was melted in an extruder with a screw diameter of 16 mm and spun. The melting and spinning conditions were: the temperature of the melting zones and the spinneret 1

Used Additions in Shares Optical Double Phase.103 Degradation Index Melt Index of 230 ° C in g / 10 min AB 0.00 0.0 1.14 2.3 19.5 0.10 0.0 2.1 24.6 0.00 0.2 2.2 30.4. 0.10 0.2 1.7 37.7 0.15 0.2 1.3 46.4 0.20 0.2 13 54.6 *

Mosten 55.212 pure no additions

Mosten 55.212 + 0.2 parts Titan Bayer R-KB-2 2.1 2.2 1.7

Mosten 55-212 + 0.2 parts of trilauryltrithiophosphiteMosten 55.212 + 0.2 parts of trilauryltrithiophosphite + 0.1 parts of stearizinose without TitanBayer R-KB-2 1.99 2.1 2.6 19.8 219653 and heads 3ÓO ° C, pump pressure 8 MPa, pump pressure 2 MPa, dosing 20 g / min, spinning speed 130 m / min, number of holes in nozzle 20, nozzle hole diameter 0.3 mm, capillary length 6 mm. Elevated temperatures as well as the presence of trilauryltrithiophosphite were required for both destruction and polypropylene. It can be seen from Table 1 that, depending on the concentration of zinc stearate and stearic acid in their dopolypropylene mixture, the thermal stability and fluidity of the polar system are increased and there is a possibility of regulating them. By increasing the flowability of the melt, it is possible to improve the spinning process, widen (also the temperature interval of the melt transport as well as the spinning of the polymer, especially in the desired lower temperatures.

A similar procedure to Example 1. The difference is that the effectiveness of the stearate combination was evaluated of zinc (A) with calcium (B) - Table 2.l.

Table 2

Stearate used in portions Crystalline degree in% Optical double.103 8θ 8 days AB index 9 days r 154 days 0.00 0.00 53.70 62.15 3.0 0.00 0.20 46 , 88 58.35 2.54 4.0 0.10 0.00 45.62 52.99 1.19 23 0.10 0.20 44.16 2.5 0.15 0.20 44.16 50, 92 0.20 0.20. 41.78 1.12 2.0 0.30 0.20 45.62 035 0.20 52.29 58.35 0.10 0.10 42.73 50.92 0.10 0.15 46.17 52 , 92 1.91 i Mosten 55.212 net 1.6

Mosten 55.212 + 0.2 parts of calcium stearate without additional additionsMosten 55.212 + 0.4 parts of calcium stearate without further additionsMosten 55.212 + 0.1 parts of zinc stearate other additions zinc stearate parts without additional additions 2.4 2.1 2.7 4.2 other systems - Table 2. Bridge 55.212 was twisted on an Apex mill with a sieve diameter of 1.96 mm. The weaving speed was 135 m / min. Table 2 shows that depending on the concentration of zinc stearate and calcium stearates in their mixture | It is more or less possible to suppress the pre-orientation and crystallinity as well as to enhance the thermal stability of the degraded polymer, especially in the preparation of its non-crosslinked fibers. | Possibility of regulation of undrilled polypro! fibers from yo-yo to compromise-j

Claims (1)

5 values, and thereby enable it to improve its formability. Example 3 A procedure similar to that described in Example 2. The difference is that the efficacy of the combination of zinc and calcium stearates was monitored in the presence of an organic, poorly dispersible pigment, Chromophtal Rot A3B - 0.3 parts into powdered non-stabilized polypropylene. Tatren HPF 411. Titanium Bayer R-KB-2 'and trilauryltritiophosphite were not added to polypropylene - Table 3. The temperature of the melting zones and spinning head was 240 ° C. Ibola spinning speed 130 m / min. It can be seen from Table 5 that by adding 0.2 blends of zinc stearate and 0.2% calcium stearate 5e to the polypropylene, it is possible to suppress the pre-orientation and to improve the thermal stability of the unstabilized polymer in the presence of the above pigment. The increased thermal stability of the polymer allows for the avoidance of discoloration. The aforementioned small amounts of reagent mixtures act over a wide range of temperatures - from ordinary temperatures at which optical double determinations are made up to temperatures of - 280 ° C and above - Table 1 to 3 for the degradation index. I Effect of small amounts of zinc stearate mixtures With the use of calcium stearate or stearic acid to alter the two desirable or more desirable properties, the application of small amounts of said slabs may be used to suppress the increased orientation or crystallinity of the polypropylene under the influence of certain pigments which make the polymer. fiber-fiber, hard-to-inelastic, non-elastic I PREDMET A polypropylene-based blend with controllable, stabilizing, or theological and crystalline properties, characterized in that it contains 0.1 to 0.5 parts per 100 parts by weight of polypropylene preferably 0.1 219] 219653 Table 3 Stearate used in portions Grade Grits for 9 days Glucose% for 160 days Optical Dual.103 for 5 days Degradability Index AB '0.0 0.0 56.56 58 , 35 9.85 3.5 0.0 0.2 58.81 59.53 2.9 0.0 0.3 60.08 60.88 0.0 0.4 65.93 7.08 0.1 0.2 60.08 2.0 0.2 0.2 56.26 64.67 4.60 1.7 0.3 0.2 56.26 65.93 0.4 0.2 56.56 66 48 Tatren HPF 411 pure 58,19 63,45 1,9 Tatren HPF 411 + 0,2 portions of calcium stearate other than 1,2 and increase the amount of fibrous waste. On the other hand, with other polymer blends and other processing steps and using the products thereof, an increased degree of crystallinity is required. This is because, with this, the ability to 'reduce tack' and friction is improved and the optical properties of the material improved. These properties can be more or less achieved and controlled by the use of a certain concentration of substances according to the invention. In doing so, the thermal stability of the polypropylene increases, thus preventing color changes. In addition, some components of the stabilizing system may be partially replaced by said stearate mixtures. Used; allowances are fasting, accessible and biologically safe. The present invention has application significance for optimizing properties in the preparation of processing polymer systems in this fiber and plastics article. INVENTION I 0.4 parts of zinc stearate and 0.1 to 0.5 parts, preferably 0.1 to 0.4 parts of stearate calcium, optionally 0.1 to 0.3 parts of stearic acid. ;