SU1105119A3 - Method of obtaining elastoplastic composition - Google Patents

Abstract

METHOD OF OBTAINING ELASTOPLASTIC COMPOSITION; including blending (ethylene-propylene rubber, thermoplastic polyolefin, and a volcanizing agent at the melting point of the polyslefin, followed by vulcanization, characterized in that, in order to obtain rubber of improved oil resistance, a mixture of armored methylolphenol resin and zinc oxide is used as a vulcanizing agent in a ratio of 2.75 to 7.96: 0.05-2.41 or a mixture of dimethylol-P-nonylphenol resin and a halogen-donor - tin chloride or chlorosulfonated polyethylene with a ratio of 4.32-5.63: 0.75-1.8 with the following mponentov composition ratio to respectively 25-62,2: 37,8SP 75: 2,8-10,37 or 5,07-7,43, and vulcanization is carried out pri180-220 C.

Description

PJ

ico The invention relates to the production of plastics and relates to the development of a method for the preparation of an elastoplastic composition. A known method for producing an elastoplastic composition, comprising mixing ethylene-propylene rubber, thermoplastic polyolein and a vulcanizing agent, sulfur-containing and / or peroxide, at a ratio of 25-75: 25-75: 2-5, respectively. The mixing is carried out at the melting point of the polyolefin. After mixing, vulcanization is used. However, the known method does not allow to obtain rubber with the required oil resistance. The purpose of the invention is to obtain a rubber of improved oil resistance. The goal is achieved in that according to the method for producing an elastic plastic composition comprising mixing ethylene-propylene rubber of a thermoplastic polyolefin and a reducing agent at a melting temperature of the polyolefin followed by vulcanization, a mixture of brominated methylolphenol resin and zinc oxide is used as a vulcanizing agent, 96: 0.05, 2.41, or a mixture of dimethylol-p-nonylphenol resin and a halogen-donor - chlorine tin or chlorosulfonated polyethylene with a ratio of 4.32-5.6: O, 75-1.8 pr and the following ratio of components of the composition, respectively, 25-62.2: 37.8-75: 2.8-10.37 or 5.077, 43, and vulcanization is carried out at 180-220 ° C. Example 1. A masterbatch containing ethylene-propylene triple rubber (TEPK), paraffin oil for filling, carbon black, zinc oxide stearic acid and antioxidant is mixed with polypropylene in a Brabender mixer at 80 rpm at an oil bath temperature of 180 ° C for 2.5 minutes, after which the polypylene pilene is melted to obtain a homogeneous mixture. Below, the temperature of the Brabender mixer is understood as the temperature of the oil bath). After that, the phenolic vulcanizing agent is added, continuing to mix for another 4 minutes. During this time, reach the maximum consistency of Brabender. The composition is removed, the test specimens are directly pressed at 210 ° C, then they are cooled to a temperature below 100 ° C under pressure before unloading. The properties of the formed sheet material are measured and recorded. The compositions of mixtures 1-6 and the properties of rubbers of them are given in table. 1, Mixtures 1-3 and 4-6 contain various ethylene-propylene rubbers of TEC. In compositions 1-3, TECs contain 73% by weight of ethylene and 4.4% by weight of ethylidene-norbornene. The polydispersity of 2.2; relative density is 0.86; Mooney viscosity 55.40 (ML 121 ° C). In compositions 4-6 TEC contains 55% by weight of ethylene and 4.4% by weight of ethylidene-norbornene. Polydispersity 5,2; relative density is 0.86; Mooney viscosity is 40 ({L 1 + 8; 121 ° C). Low-flow polypropylene, relative density 0.902; elongation of 11%. The antioxidant is polymerized 1,2-DIHIDRO-2,2,4-trimethylquinoline. SP-1056 is a brominated methylolphenol vulcanizing resin. Sulfur vulcanizer contains, weight 4.: sulfur 17.2; zinc dimethyldithiocarbamate 10.3; tetraethylthiuramdisulfife 10.3; 2-Sue (benzothiazolyl) disulfide 34.5; dipentamethylentiuramhexasulphide 27.7. Mixtures 1 and 4 are control free of vulcanizing agents, mixtures 2 and 5 are vulcanized with a phenolic vulcanizer, mixtures 3 and 6 are included for comparison purposes and are formulations; vulcanized with a sulfur based curing system. TEC in mixtures 2,3,5 and 6 is completely vulcanized, i.e. The compositions differ in a rubber content of less than 3 wt.% (calculated on the total weight of the available rubber) extracted in cyclohexane at room temperature or in boiling xylene. Vulcanized compounds are elastomeric and are treatable as thermoplastics and can be reprocessed without the need for any regeneration, unlike statically vulcanized compounds that are thermo-reactive and cannot be treated as thermoplastics. Compositions obtained from TEC and containing a large amount of ethylene are distinguished by increased hardness. The compositions obtained with the use of phenolic vulcanizing resins, have basically the same strength properties, while

as a sulfur-based vulcanizing system, it is more effective for compositions containing low-semidity TECs. Compose: vulcanized with a phenolic vulcanizing system differ from those vulcanized with a sulfur vulcanizer, higher oil resistance (low oil swelling) and better residual deformation.

Compositions containing a mixture with TEPK as a main component, and the properties of rubber from them are given in table. 2. Mixture 1 does not contain vulcanizers. Mixture 2 is vulcanized with a phenolic vulcanizing resin. Mixtures 3 and 4 are included for comparative purposes and are vulcanized with a sulfur vulcanizing system or a peroxide-based vulcanizer. Polypropylene is the same as in table. 1. TEC is a ternary copolymer containing 69 wt.% Ethylene, 8.3 wt.% Ethylidene-norbornene and polydispersity propylene polypropylene 2.2, Mooney viscosity 51 (ML 100 ° C).

The process is similar to that given in table. 1 except that zinc oxide was added to the mixture 2 minutes after the addition of the phenolic vulcanizing resin was added, and 0.6 parts by weight was added to mixture 4. tris - (nonylphenyl phosphite (free radical scavenger) after reaching maximum Brabender viscosity. The composition, vulcanized with phenolic resin, has a greater oil resistance (low oil swelling) and increased residual deformation,

Example 2. In table. Figure 3 shows soft formulations containing large amounts of rubber and filling oils. The method is carried out similarly to table. 1, except that the curative agents are added first, after which the stirring is continued for an additional 5 minutes. Antioxidant, polypropylene and vulcanizers are the same as. in tab. 1. Mix 1 - control, not containing a vulcanizing agent. Mixtures 2, 4 and 6 are vulcanized with phenolic resin, mixtures 3, 5 and 7 are vulcanized with a sulfur vulcanizing system. Compounds cured with phenolic resin have better residual compression and higher oil resistance have a softer surface after extrusion or cast under pressure.

and the surfaces of the extrudates and the parts formed from them have no plaque and are not sticky. Mixture 6, containing a large amount of rubber, has superior zlastomernym properties, i.e. low residual elongation and low residual. compression.

The analysis of the degree of vulcanization is given in table. four.

Analysis of the degree of vulcanization is given in Table. 4. The components of the mixtures are the same as in table. 3. The data table. 4 shows that an increase in the degree of vulcanization has a smaller effect on the mechanical strengths in the case of a sulfur vulcanizing system than in the case of a phenolic resin. The breaking strength generally remains unchanged when the concentration of the vulcanizers changes in both systems. As the concentration of the curative phenolic resin increases, the modulus increases and the elongation decreases, while the modulus and elongation generally do not change with changes in the concentration of the sulfur vulcanizer. In all analyzed cases, the compounds vulcanized with phenolic resin, have the best residual compression and high oil resistance.

J

The proposed compositions, vulcanized with nonhalogenated phenolic resin, are given in table. 5 The method is similar to that described. Mix 1 - control, does not contain a vulcanizer. Mixture 2 - control, contains a phenolic vulcanizing resin, but without an activator of the vulcanization process. Mixture 3 contains dimethylol-P-nonylphenol (non-halogenated) phenolic vulcanizing resin (trade name SP-1045). Mixtures 3 and 4 contain tin chloride and chlorosulfonated polyethylene, respectively, as the halogen donor. Polypropylene and sulfur vulcanizer introduced in quantities according to the table. 1. The data show that a critical factor is the use of a vulcanization activator together with a non-halogenated phenolic vulcanizer for the purpose of complete vulcanization of rubber. The presence of a halide donor (vulcanization activator) is expressed in a significant increase in tensile strength and a significant improvement in residual compression and oil resistance. A high oil swelling for mixture 2 indicates that rubber is only partially cured. The compositions by a vulcanized system based on a phenolic resin containing a halogen donor have a large residual compression and oil resistance compared with) - with a similar composition vulcanized with a sulfur vulcanizer. Mixtures 3 and 4, in particular, show a strong decrease in tensile strength after oil swelling. In the experiments (Table 4), it was shown that for the purpose of complete vulcanization of rubber, the presence of a vulcanization activator (zinc oxide) is required. The process is the same as in table. 1, however, the initial mixture is not used, since the compositions do not contain either carbon black or filling oil. The compositions of mixtures 1 and 2 are the same, except that mixture 2 does not contain a vulcanizer (zinc oxide). Mixture 2 was tested twice, obtaining the average values summarized in Table 2. 6. The compositions are extracted with boiling xylene for the purpose of determining the vulcanization of rubber (vulcanized rubber does not dissolve in boiling xylene). Samples B in the form of a thin film (about 0.005 mm) are placed in boiling xylene. After 30 minutes, the film is usually disintegrated. The xylene suspension is then filtered through a glass fiber filter with openings — pores of 0.3 microns in size. All ingredients with the exception of polypropylene are considered part of the vulcanized rubber. The filtrate is cooled to room temperature, whereby the polypropylene (or crystalline graft copolymer) is precipitated, after which it is removed by filtration. The second filtrate is then evaporated, and the product dissolves in xylene at room temperature (atactic polypropylene, low molecular weight polypropylene, amorphous ethylene propylene copolymer, unvulcanized TEP or non-crystalline polypropylene triple ethylene propylene rubber graft copolymer). The weight percentages of the isolated individual products are recorded together with the calculated theoretical values for the vulcanized TETTA and polypropylene. The equivalent value for 96 vulcanized rubber is corrected for products contained in unvulcanized rubber, which, after vulcanization, remain insoluble in boiling xylene. The correction is the sum (1.6 wt.% Of rubber), the acetone-soluble part of the unvulcanized rubber, 0.9 wt.% And the insoluble part of the unvulcanized rubber that is insoluble at room temperature in cyclohexane, 0.7% by weight. Acetone-soluble product is considered as a non-crosslinkable, insoluble in cyclohexane at room temperature product — as a polyolefin homopolymer. For example, in mixture 1, the calculated value (in parentheses) for insoluble rubber is 39.3% by weight. This value would be 39.6 BC.%, If not corrected, as indicated above. A similar correction is made on the calculated values (in parentheses in Tables 7-9). The data show that mixture 1 (composition containing zinc oxide) has better residual compression and residual elongation, as well as better oil resistance, and in boiling xylene it is impossible to extract any amount of rubber. This suggests that the rubber is completely vulcanized, there is no graft copolymer, while in the composition that does not contain zinc oxide, 32% of the rubber can be extracted in boiling xylene. Thus, either the graft copolymer content is present, or the rubber is not fully vulcanized. The data show that in order to obtain the proposed composition containing fully vulcanized rubber, it is critical to use a vulcanization activator in order to facilitate the reaction mainly between TEC and the phenolic vulcanizing resin. The proposed compositions of high hardness, containing, gas soot and large quantities of polypropylene, are given in table. 7. The initial mixture of TEP, carbon black, zinc oxide and stearic acid is mixed with polypropylene in a Brabender mixer at 180 ° C at a speed of 80 rpm until the polypropylene melts and a homogeneous mixture is obtained. Then the vulcanizing phenolic resin is added, continuing to mix until the maximum consistency according to Brabender is reached 71 (after 3 minutes). The composition is discharged leafed, re-loaded into the Brandender mixer and 2 minutes (treated at 180 C. The data show that the compositions are harder and tighter than those containing large amounts of rubber, and the residual elongation of the compositions has a reduced elasticity. According to the solubility data, rubber completely cured so that there is not the slightest amount of rubber dissolved in boiling xylene. The order in which the ingredients are added is important, in particular with regard to the vulcanization activator, like zinc oxide. The addition of large amounts of zinc oxide in the absence of a filler (Table 8). The method according to Table 8 is similar to Table 1, but the initial mixture is not used, since there is neither carbon black nor oil for NIN. Ingredients add the specified pores Zinc oxide is added to mixtures 1–5 before the phenolic vulcanizing resin is added, while zinc oxide is added to mixtures 6–9 after the phenolic resin. The data show that the mechanical strength decreases with increasing amount of zinc oxide if added be in front of phenolic vulcanizing resin. Moreover, the amount of zinc oxide has little effect on mechanical strength, if it is added last, and, in addition, compounds of superior properties are formed. Compositions of this kind are distinguished by higher mechanical strengths, increased residual elongation and better oil resistance. The sequence of addition of zinc oxide has a significant effect on the object of vulcanization of rubber. The amount of rubber dissolving in boiling xylene ranges from 0 to 23% depending on the oxide content of the compositions (mixture 1-5), if zinc oxide is added to the phenolic vulcanizing resin, while the amount of rubber which dissolves in boiling xylene is 1 wt.% or less in terms of rubber in mixtures. If zinc oxide is added last. Data on solubility in cyclohexane at room temperature 98 round also shows that a larger part of rubber is soluble in formulations where zinc oxide is added in front of the phenolic vulcanizing resin. The percentage by weight of rubber dissolved in cyclohexane was corrected to account for the portion of unvulcanized rubber that was soluble in acetone. ka, namely 0.9%. The amount of correction could be larger, taking into account stearic acid, which could also be extracted in cyclohexane. The analysis, which gives quantitative ratios of TEC and polypropylene in different variants, is given in Table. 9. The formulations contain only TEC, polypropylene, phenolic vulcanizing resin and zinc oxide. The amount of zinc oxide and phenolic vulcanizing resin vary in the amount of 2 parts by weight. zinc oxide and 10 weight.h. phenolic vulcanizing resin per 100 weight.h. rubber TEPK and polypropylene are loaded into a Brabender mixer and treated at 180 ° C at a speed of too rpm. Three minutes after the polypropylene melted, a phenolic vulcanizing resin was added, continuing to mix for another 4 minutes. The composition is discharged, flipped, reloaded into the Brabender mixer and mixed for another 20 minutes. After this, the composition is again discharged and scrolled, followed by direct compression at 220 s. All of these compounds are thermoplastic, and mixtures 1-4 are elastomeric. Mixtures 5 and 6, which contain large amounts of polypropylene, are not elastomeric and form a neck when drawing samples, i.e. when the test sample goes beyond the limit, preventing it from returning to its original form. Through the entire range of quantitative ratios, the rubber is completely vulcanized to form the amount of rubber dissolved in boiling xylene, in a volume of less than 1 wt.% Based on the rubber contained in the composition. The staining composition containing white pigment (magnesium silicate) and the composition containing polyethylene are given in table. 10. The method of obtaining composition 1 is the same as in table. In except that the silica silicon is completely dispersed before adding the phenol vulcanizer. When using siliceous magnesium there is no need for zinc oxide. Solubility data in cyclohexane show that rubber is completely vulcanized. The composition of mixture 2 is prepared as follows. Rubber and polyethylene are loaded into a Brabender mixer and insulated at 180 ° C and 80 rpm to melt the polypropylene. Then stearic acid and a phenolic volcano are added, continuing to mix until a homogeneous mass is obtained. After that, zinc oxide is added, continuing to mix for 2 minutes over the period (about 3-4 minutes) until the maximum consistency is reached. The resulting composition has a thermoplastic and elastomeric character. Solubility data indicates that the rubber is completely volcanic. The proposed compositions based on different vulcanizers are given in Table. 11. TEC contains 55 wt.% Ethylene, 40.6 wt.% Propylene and 4.4 wt.% Dicyclopentadiene and is distinguished by a polydispersity of 6.0. Polypro flax is the same as in table. 1. The phenolic vulcanizing resin is added last, and Lime 1 (control) does not contain the vulcanization activator. The properties of the composition show that the rubber is not fully vulcanized (or possibly a graft copolymer is formed). This is confirmed by the data on solubility in cyclohexane. Mixtures 2-4 contain zinc oxide, zinc stearate and tin chloride as a vulcanization activator. In these mixtures, the rubber is vulcanized to a significant degree. The percentage of rubber soluble in cyclohexane is corrected given that 1.38% by weight of unvulcanized rubber is dissolved in acetone. Corrected data is marked with an asterisk. Mixtures 4 and 5 show that when using tin chloride as a vulcanization activator, instead of a halogenated phenolic vulcanizing resin, a non-halogenated phenolic vulcanizing resin can be used, and the resulting elastoplastic compositions exhibit essentially the same properties. It is important that the activator or vulcanization activators be used and the proper concentration is applied. Without an activator or if the concentration is not correct, the rubber will not be fully vulcanized, which causes deterioration of the properties of the mixture. High concentrations of the activator, in particular, when added prior to the phenolic vulcanizing resin, are presumed to cause the vulcanizing resin to interact with itself (homopolymerization), which entails the depletion of the vulcanizing system. The proper concentration of the activator varies depending on the type of activator, phenolic vulcanizing resin or rubber, the order in which these components are added and the temperature conditions that are easy to establish experimentally. The proposed formulations in which TEC contains various monometers, are given in table. 12. Mixes 1 and 2 illustrate the compositions contained in the TEPK where non-saturation occurs from ethylidene-norbornene (ENB). Mixtures 3-6 are formulations containing TECs with a concentration of 1,4-hexadiene (1.4 DG). Mixture 1 contains TEC with saturation of dicyclopene-yen (DCPD) “Compositions are prepared according to the process according to tab. 1 except that the Brabender temperature for mixture 7 is 170 ° C. The vulcanization activator is added in mixture 1-6 last. In a mixture of 7, tin chloride is added before the phenolic vulcanizing resin, after which zinc oxide is added. The uncorrected value is calculated for insoluble rubber. The calculation is carried out, expecting that all ingredients except polypropylene become insoluble after vulcanization (indicated by brackets). The values marked with an asterisk are corrected as follows: in mixtures 4 and 7, 4.13 and 1.38% by weight, respectively, of unvulcanized rubber, does not dissolve in acetone. The unvulcanized TEP used in blend 6 does not contain acetone-soluble products, but 2.52 wt.% Unvulcanized rubber does not dissolve in cyclohexane at 50 ° C, which indicates the presence of a large amount of this non-crosslinkable full-polymer polymer. According to the table. 12 all the compositions have good mechanical strengths, the polydispersity of the rubber does not have a noticeable effect on the volume of vulcanization, all the compositions differ in satisfactory swelling in oil and residual compression, and the rubber in all compositions is completely vulcanized. The improved manufacturability of the proposed formulations is illustrated by comparing the extrusion data of mixtures vulcanized with a phenolic vulcanizer and sulfur. For example, tubes with an outer diameter of 12.7 mm are obtained by extrusion of compositions similar to mixtures 2 and 3 of the table. 13 through a die plate (outer diameter of 12.7 mm, inner diameter of 9.53 mm; ratio of length to L = 20: 1) at a removal rate of 381 cm / min and using an extruder of the type Davis-Standard (3.81 cm) equipped with a general purpose screw. (ratio of length and 24: 1), operating at a speed of 70 rpm. The dimensions of the tubes are held by a light internal air pressure and rapid cooling with water. The temperature is kept in the range from sufficient for complete melting of polypropylene () to that at which excessive smoke builds up (232 ° C. The average temperature is also analyzed (216 ° C). Another analyzed variable is the degree of stretch, which expresses the integrity or solidity of the composition by its extensibility at the processing temperature. The degree of extensibility is the ratio of the area of the die ring and the cross-sectional surface of the tube, stretched with a decrease in diameter to the tube breakage due to The results of the analysis are given in Table 13. The data show that the composition obtained with the help of a phenolic vulcanizer is more technological than the composition obtained with a sulfur vulcanizer. In particular, the composition vulcanized with a phenolic resin can be extruded into a wide temperature range, and it is possible to manufacture tubes of a wide range of sizes, as is clear from the ratio of the surfaces. Islands similar in mixtures 6 and 7 of the table. Z.-So, for example, a bar (5 mm) is obtained by extrusion of the indicated compositions through a 5.08 mm spinneret using an extruder (2.54 cm) NRM, equipped with a general purpose screw (ratio of length and 16: 1) at a speed of 60 / min Temperatures range from 180-190 to 210-220s. The results are shown in Table. 14. The data show that the composition obtained with a phenol vulcanizer can be extruded at a higher speed, producing tubes with a smoother surface than the composition obtained with a sulfur vulcanizer. Thus, the inventive formulations include mixtures of polyolefin resin and dispersed sufficiently small particles of cross-linked rubber in order to obtain concentrated compositions, which are treated as thermoplastics. An average size of rubber particles in the order of 50 microns is satisfactory, in more preferred formulations the size of rubber particles is 5 microns or less. Table 1

Filling oil, 30.6 30.6 parts by weight 28.8 28.8 Gas soot, parts by weight 1.8 1.8 Oxidine, parts by weight 30.6 30.6 30.6 30.6 28.8 28.8 28.8 28.8 1.8 1.8 1.8 1.8 1.8

13

Stearic acid, parts by weight

Antioxidant, wt.h. SP-1056 weight.h. Sulfuric vulcanizer, weight, h

Shore hardness, D

Module (100%), kg / cm

Strength at stretching, kg / cm

110

Relative extension

2,5-Dimethyl-2,5-di- (treg peroxy) hexane, parts by weight

Shore hardness, D Module (100%) kg / cm2 Module (300%), kg / cm

1105119

14 Continued table. one

0.36

0.36 0.36

0.36

0.72

3.24

1.31

1.31

47

35

40 114

39

101

70

87

78

190

179

139

1.2

43 39 82 122

42

110

101

221

179

15

Tensile strength,

kg / cm 64

Relative elongation at break,%

Residual elongation,% Residual compression,% Swelling in oil,%

Weight,% sample, sol. in cyclohexane

at room temperature

Weight. % rubber, dissolved in cyclohexane at room temperature (not correct for acetone-soluble part of rubber) TEC, filled with oil 91,291,291.2 Polypropylene, parts by weight 54,454,454,4 Oil for a full 36, 436,436.4, weight.h. 36,436,436,4 Gas soot, parts by weight Antioxidant, 0,910,910,91 weight, h. 2,282,282,28 Zinc oxide, parts by weight Stearic acid, 0,460,460,46 weight.h. SP-1056, parts by weight 4,1Sulfur vulcanizer, parts by weight Shore hardness, A 81 83 84

1105119

Continued table. 2

244

217164

1.7

Table 3 1.65 100.6100.6124.4124.4 49.749.737.837.8 28.928.931.131.1 28.928.918.6618.66 0.960.96 2.412.411,163.11 0.490.490.620.62 4.43-6.84 - 1.82 - 2.25 82 81 71 71

17

Tensile strength

upon stretching, kg / cm 44 141 150 134 150 91 69

Relative elongation at break,% 500 410 550 390 560 290 350

Residual elongation,% - 14 14 12 11 6 17 Residual compression,% - 30 47 28 49 20 34 Swelling in oil,% 167 52 69 52 84 59 59

TEC contains 63% by weight of ethylene and 3.7% by weight of ethylidene-norbornene. Polydispersity 2,6; relative density 0.90; Mooney viscosity (F, - 4.125 C) 50; ternary copolymer filled with stainless petroleum oil (100 phr). The content of TEC in formulations 1-7 is equal to 62.2 parts by weight.

91.2

54.5

36.4

36.4 2.28

0.46

0.91

1105119

18 Continued table. 3

Table 4

4.05 5.07 6.08 7.96

Continued table. four

21 Components of the mixture and properties of rubber from them “-“ t “- LGG G PLL Tensile strength at stretching, kg / cm Elongation at break,% Residual elongation,% Residual compression,% Swelling in oil,% Strength at stretch after oil, kg / cm Strength at dissolution Reduction of tensile strength at stretch,%

TEC contains 69% by weight of ethylene and 8.3% by weight of ethylidene-norbornene. Polydispersity 2.1; relative density is 0.86; Mooney viscosity 50 (ML-8, 100 ° C).

1105119

22

Continued table. five

Table 6 L ........ LfLL..L.LlT17r, in, ..,

Components of the mixture and properties of rubber from them

Elongation at break, Residual elongation,% Residual compression,% Swelling in oil,%

Wt.% Sample, ins. in boiling xylene

Wt.% Rubber sol. in boiling xylene

Wt.% Sample, ins. in xylene

Wt.% Sample sol. in xylene

Total %

TEP contains 55 wt.% Ethylene and 4.4 wt.% Ethylidene-norbornene. Polydispersity of 2.5; relative density is 0.86; Mooney viscosity 70 (ML H8 at); vulcanizes sulfur very quickly.

See tab. one.

Mixture

530 52 67 151

26.3 (38.6)

32.0

56.7 (61.4)

17.8 100.8

Table 7

25

TEPK50

Polypropylene, weight, h 5,0

Stearic acid,

weight.h.0,5

Zinc oxide, weight.h.0,05

SP-1056, weight parts 5,65

Zinc oxide, parts by weight. Module (100%), kg / cm 116

Module (300%), KG / CM2224 Ultimate tensile strength, 230 228 195 181 kg / cm Relative elongation at break,% 320 460 480 Shore roughness, D 45 Remaining elongation -. Residual compression,% 31

1105119

26 Continued table. 7

2.25 3.0

0.751,52,253,0

99 96 109 108107105

133. 122 193177174170 149 260 241 169 262 500480380390430440 43 4344454444 323525262525 414534353338

27 Swelling in oil 121 145 149 152 Wt.% Of sample, not sol. in boiling 52.5 50.5 46.4 45.5 (52.2) (52.5) (53.1) (53.5) wt.% rubber, sol. in boiling xylene O 4.0 13.4 16.0 wt.% of sample solution. in cyclohexane at 0.29. 1.7 2.3 2.2 room temperature Weight% rubber, sol. in cyclohexane at room temperature O 2.8 4.0 3.9 62.8 51.7 Weight. X sample, not sol. (61.7) (52.0) in boiling xylene; wt.% Rubber, sol. 1 boiling xylene

See tab. 6,

28 Continuation of table. eight

1105119 164 106 106 110 112 42.3 54.0 53.7 53.0 54 О 53.8) (52.5) (53.1) (53.5) (53.8) 23.0 О О 1 , 0 About 2.5 0.92 0.71 1.03 0.71 4.6 1.1 0.6 0.6 0.6 0.6 Sheik Sheik 44.0 31.4 21.7 12.0 (42, 2) (31.5) (21.7) (11.0)

29

tapk

Polypropylene, parts by weight

Polyethylene, parts by weight

Silicon magnesium, parts by weight

Stearic acid, parts by weight

Zinc oxide, parts by weight

SP-1056, parts by weight

Shore hardness, D

Module (100%), kg / cm2

Module (300%), kg / cm

Strength at rast same

Elongation at

Residual elongation,%

Residual compression-e,%

Wt.% Sample,

not sol. in boiling xylene

Weight. % rubber sol.

Wt.% Sample sol. cycle at room temperature. See tab. 6 Polyethylene middle class. A, category 5,

1105119

thirty

Table 10

40 60

0.4

0.8

,five

44

102

158

190

370

32

27

46.8) (42.6)

About 0.2

Table 11 atomic weight distribution, D 1248-72, type 111, ind. square 0.3 kg / 10 min, density 6.930 g / cm. Zinc stearate, parts by weight 2HjO, weight.h. Phenolic vulcanizing resin, parts by weight Shore hardness, D Module (100%),. kg / cm Module (300%), kg / cm Strength at stretching, kg / cm Relative elongation at break,% Residual elongation,% Residual compression,% Swelling in oil,% Weight. % of sample, sol. in cyclohexane at room temperature; wt.% rubber, ras. 40 4,2 in cyclohexane at com38, 6 2.8 natal temperature Note: 55 55 Ethylene, wt.% ENB ENB Type monomer 4.4 2.6. Monomer, wt.% 214 2.2 V mixtures x 1-3 - halogenated phenolic vulcanizing resin, (see Table 1); in mixtures 4 and 5, a non-halogenated phenolic vulcanizing resin (see Table 4). 212 221 1.6 0.4 3.0 0.8 O 1.6 O Table 12 65 55 56 70 55 1.4GD 1.4GD 1.4GD 1.4GD DCPD 3.7 5.0 3.7 3 , 7,4,4

33

1105P9

FOR Continuation of the table. 12

35 A2.9 42.1 wt.% Sample, not sol. in xylene at room temperature Weight. % of sample, sol. in xylene at room 5,0 4, in temperature. Wt.% of sample, sol. in cyclohexane at 0.8 to 0.8 at room temperature Weight% rubber, sol. in cyclohexane at 1.5 1.5 room temperature

36

1105119. Continued table. 12 44.7 .42.5 42.1 46.5 43.6 5.7 7.6 6.5 4.7 6.1 0.9 3.1 0.9 1.3 1.3 1.7 5.8 1.7 2.4 2.4 1,, 0

39

Comparative surface properties of rubber

39.2

43.5 Smooth

Rough-knotted 0,13-0,25 Many protrusions

1105119

40 Table 14

34.1

Rough-knotted 0,13-0,25 Many protrusions

Claims (1)

METHOD FOR PRODUCING AN ELASTOPLASTIC COMPOSITION, comprising mixing (Ethylene propylene rubber, thermoplastic polyolefin and a vulcanizing agent at the melting temperature of a polyolefin followed by vulcanization, characterized in that, in order to obtain rubbers with improved oil resistance, a mixture of armored resin and benzene resin is used) at a ratio of 2.75-7.96: 0.05-2.41 or a mixture of dimethylol-P-nonylphenol resin and a halogen donor - tin chloride or chlorosulfonated polyethylene with a ratio of 4.32-5.63: 0.75-1.8 with the following ratio of components of the composition, respectively 25-62.2: 37.875: 2.8-10.37 or 5.07-7.43, and vulcanization is carried out at '180-220 C. 1 1105119