Ethylenepropylene copolymer-base composition
FIELD: polymers.
SUBSTANCE: ethylenepropylene copolymer-base composition comprises dicumyl peroxide, bis-(tert.-butylperoxyisopropyl)benzene or 1,1-di-tert.-butylperoxy-3,3,5-trimethylcyclohexane as an organic peroxide and vinyltri-(methoxyethoxy)silane or polyphenylethoxysiloxane as an organosilicon additive. Except for, the composition comprises additionally a vulcanization co-agent taken among the group including low-molecular polybutadiene with the content of 1,2-links 20-80%, trimethylolpropane-trimethacrylate, triallyl cyanurate and quinone dioxime-1,4. Also, the composition comprises stearin, paraffin and zinc oxide. The composition shows high physical-mechanical properties, oil-resistance and dielectric properties. Invention can be used, in particular, in cable industry.
EFFECT: valuable properties of composition.
2 cl, 3 tbl, 8 ex
The invention relates to the chemistry of polymers, and more particularly to polymeric compositions based on ethylene-propylene copolymer, and may find application in the manufacture of cables for submersible neftenaliv, chemical and electrical engineering, household appliances, in the manufacture of rubber products as cushioning materials in other areas of the economy.
Known composition based on ethylene-propylene copolymer, a vulcanizing agent (sulfur), sulfur-containing accelerator (TMTD), filler, softener, zinc oxide, 1,4-bis(2'-mercaptobenzthiazole)-piperazine and silicon-containing Supplement regopenkeyexa [ed. mon. The USSR 84931, CL301 3/28, 1979].
This composition contains sulfur and sulfur vulcanization accelerator and cannot be used as insulation metal veins, as it causes the corrosion.
In addition, one of the components of the composition - 1,4-bis(2-mercapto-metrobidazole)-piperazine has a high melting point and therefore non-uniformly distributed in the composition during its manufacture. In the industry currently, this product is not made. This composition does not have oil resistance.
Closest to the proposed compositions based on ethylene-propylene copolym the RA is the composition, contains zinc oxide, sulfur, pedicel peroxide, digidrirovanny kaolin, oligoanalgesia [ed. mon. The USSR 992531, CL308 L 9/00, 1981].
The disadvantage of this composition is that it does not have oil resistance, and oligoanalgesia is a very toxic product, hydrolytically unstable, currently in the industry are not available.
The task consisted in developing a composition having the following combination of properties: high strength, good dielectric characteristics (in the case of insulating rubber) and, most importantly, high oil resistance.
To solve this problem was developed composition based on ethylene-propylene copolymer, zinc oxide, an organic peroxide, a filler, silicon-containing supplements.
When this composition further comprises coagent vulcanization selected from the group comprising low molecular weight polybutadiene with a content of 1,2-units 20-80% (NBCH), trimethylol-propane-trimethacrylate (TPTM), financiacion-1,4 (HDO), treelistener (TAC); as the organic peroxide is used Dicumyl (MAC)peroxide, bis(tertbutyl-phenoxyisopropyl)benzene (Luperox F-40) or 1,1-di tertBUTYLPEROXY 3,3,5 trimethylcyclohexyl (Luperox 231); as a silicon-containing additive is inoltre(methoxy-ethoxy)silane (product And-172) or polyphenylsiloxane-loxin (PFAS) and a filler, selected from the group comprising digidrirovanny kaolin, chalk, micro-talc, silica, carbon black in the following ratio of components (parts by weight):
| Ethylene-propylene copolymer | 100,0 |
| Zinc oxide | 5,0-20,0 |
| Organic peroxide | 3,0-15,0 |
| Coagent vulcanization | 2,0-20,0 |
| Filler | 100,0-200,0 |
| Stearin | 0,5-2,0 |
| Paraffin | 2,0-10,0 |
| Silicon-containing additive | 0,5-2,0 |
The composition may also contain 0.5 to 10.0 parts by weight of paraffin and/or
stearin.
As the copolymer can be used as a double-propylene copolymer (qualified electronic signature certificate)and triple ethylenepropylene rubber (Sept).
All components included in the composition, are the products produced in industry or purchased abroad.
Manufacture and processing of the compositions is carried out on standard equipment and does not cause difficulties.
The invention is illustrated by the following examples.
Example
The rubber compositions shown in table 1 (mixture 1-7), is prepared as follows.
On a roll mill at a temperature of rolls 60±5�B0; With resultshowever ethylene-propylene copolymer for 2 minutes, add coagent vulcanization and stirred for 4 minutes Then add the product composition A-172 or PFAS and stirred for 2 min, zinc oxide and stearin with further stirring for 3 minutes, then add the filler and wax. The mixture is stirred for another 15 minutes, then add the peroxide and stirred for 2 min, and then thermostatic under a pressure of 100 ATM in electrophorese at a temperature of 163°C for 40 minutes
| Table 1 The compositions | ||||||||
| The components of the composition | The amount by mass | |||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | Known | |
| SKEPT | 100 | 100 | 100 | 100 | 100 | 100 | 100 | |
| Qualified electronic signature certificate | 100 | |||||||
| Zinc oxide | 5,0 | 5,0 | 5,0 | 10, | 20,0 | 5,0 | 5,0 | 6,0 |
| NBCH with the content of 1,2-SV. 80% | 15,0 | |||||||
| NBCH with the content of 1,2-SV. 60% | 20,0 | |||||||
| NBCH with the content of 1,2-SV. 20% | 20,0 | |||||||
| TPTM | 2,0 | 7,0 | ||||||
| TAC | 8,0 | |||||||
| HDA | 10,0 | |||||||
| MAC | 3,0 | 3,0 | ||||||
| Luperox F-40 | 10,0 | 5,0 | 8,0 | td align="center"> 10,0|||||
| Luperox 231 | 10,0 | 15,0 | ||||||
| Kaolin digidrirovanny | 100 | 200 | 100 | 150 | 90 | |||
| Chalk | 20 | 80 | 50 | |||||
| The micro-talc | 160 | |||||||
| Silicon dioxide | 20 | |||||||
| Carbon black | 100 | |||||||
| Stearin | 1,5 | 1,5 | 1,0 | 0,5 | 1,5 | 2,0 | 2,0 | |
| Paraffin | 2,0 | 5,0 | 10,0 | 2,0 | 5,0/td> | 3,0 | 2,0 | |
| A-172 | 1,0 | 1,0 | 0,5 | 1,5 | ||||
| PFAS | 2,0 | 1,5 | 2,0 | |||||
| Sulfur | 0,35 | |||||||
| Oligogenic-disilane | 4,0 |
| Table 2 Physico-mechanical properties of vulcanizates | ||||||||
| Indicators | Song | |||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | Known | |
| Conditional tensile strength, MPa | 9,0 | 9,2 | 8,3 | 7,8 | 8,9 | 8,0 | 10,8 | 7,6 |
| Elongation RA is the gap, % | 160 | 150 | 210 | 250 | 110 | 120 | 130 | 500 |
| The change in weight after swelling in the industrial oil at 100°24 h, % | 35 | 32 | 40 | 55 | 25 | 30 | 30 | 85 |
| Table 3 The dielectric characteristics of the vulcanizates | ||||||||
| Indicators | The wetting time at 20°With the day | Song | ||||||
| 1 | 2 | 3 | 4 | 5 | 6 | Known | ||
| Specific volume resistance, Ohm·m | About 7 | 3.2.10132,3 .1013 | 4,0 .10132,5 .1013 | 3,2 .10132,7 .1013 | 3,0 .10131,0 .1013 | 3,5 .10132,7 .1013 | 3,7 .10132,0 .1013 | 3,0 .10131,0 .1013 |
| The tangent of dielectric loss angle | 0 7 | 0,006 0,008 | 0,006 0,007 | 0,005 0,007 | 0,008 0,009 | 0,007 0,006 | 0,006 0,007 | 0,0080,009 |
| DK | 0 7 | 2,5 2,7 | 2.4GHz 2,6 | 2.4GHz 2,6 | 2,6 2,8 | 2.4GHz 2,6 | 2.4GHz 2,6 | 2,6 2,8 |
| Dielectric strength, MV/m | 0 7 | 32,0 29,5 | 32,1 30,8 | 31,8 30,5 | 29,5 28,7 | 33,2 31,6 | 31,8 30,2 | 29,0 28,2 |
From the results shown in tables 2 and 3, it follows that the compositions based on ethylene-propylene copolymer, containing in its composition coagency vulcanization selected from groups: low molecular weight polybutadiene with a content of 1,2-units 20-80%, trimethylolpropane-trimethacrylate, treelistener, financiacion-1,4; as organic peroxide Dicumyl peroxide, bis(tertbutyl-phenoxyisopropyl)benzene and 1,1-di tertBUTYLPEROXY 3,3,5 trimethylcyclohexyl, fillers and silicone additive vinyltris(methoxyethoxy)silane or polyphenylmethylsiloxane have high oil resistance and durability as compared with the composition of the prototype and retain high dielectric properties.
Thus, the proposed arrangement provides the whole complex of properties: high physical-mechanical the indicators, dielectric properties and oil resistance.
1. Composition based on ethylene-propylene copolymer containing zinc oxide, organic peroxide, a filler, a silicone additive, characterized in that it further comprises coagent vulcanization selected from the group comprising low molecular weight polybutadiene with a content of 1,2-units 20-80%, trimethylolpropane-trimethacrylate, treelistener, financiacion-1,4; as organic peroxide Dicumyl peroxide, bis(tertbutyl-phenoxyisopropyl)benzene and 1,1-di tertBUTYLPEROXY-3,3,5-trimethylcyclohexane, a filler selected from the group comprising digidrirovanny kaolin, chalk, micro-talc, silica, carbon black, and as silicone additives - vinyltris(methoxyethoxy)silane or polyphenylmethylsiloxane in the following ratio of components, parts by weight:
| Ethylene-propylene copolymer | 100,0 |
| Zinc oxide | 5,0-20,0 |
| Coagent vulcanization | 2,0-20,0 |
| Organic peroxide | 3,0-15,0 |
| Filler | 100,0-200,0 |
| Stearin | 0,5-2,0 |
| Paraffin | 2,0-10,0 |
| Silicone additive |
2. The composition according to claim 1, characterized in that it additionally contains stearin and/or paraffin in the amount of 0.5 to 10.0 parts by weight of
FIELD: polymer materials.
SUBSTANCE: invention relates to polyethylene molding mass with multimodule molecular weight distribution intended to manufacture hollow articles such as gas tanks, canisters, barrels, and bottles using extrusion. Molding mass has density at least 0.940 g/cm3, contains low-molecular polyethylene with viscosity index 40-150 cm3/g in amount 30 to 60%, high-molecular copolymer of ethylene with another C4-C10-olefin with viscosity index 150-800 cm3/g in amount 30 to 65%, and ultrahigh-molecular polyethylene with viscosity index in the region 900-3000 cm3/g in amount 1 to 30%. Molding mass is prepared by cascade-based suspension polymerization.
EFFECT: increased degree of blowing and improved balance between hardness and fissuring resistance.
3 cl, 2 tbl, 5 ex
FIELD: road, industrial and civil building, in particular sealing and hydraulic insulating material.
SUBSTANCE: invention relates to industrial method for production of modified bitumen mastic. Claimed bitumen-polymer material contains (mass %) oil bitumen 60-70; synthetic resin 2-10; oil solvent and/or black oil 18-30; sulfur-containing compounds 0.5-5.0; and additionally oxyethylated alkylphenol as surfactant 0.1-5.0. Sulfated mixture of oil bitumen, synthetic resin, oil solvent and/or black oil treated for sulfitation at 140-2300C is used as sulfur-containing compounds. Method for production of said material also is disclosed.
EFFECT: polymer-modified bitumen mastic and sealing of improved quality; method for production of increased capability; inexpensive raw materials; energy-conversation technology.
6 cl, 3 ex, 4 tbl, 1 dwg
FIELD: road, industrial and civil building, in particular sealing and hydraulic insulating material.
SUBSTANCE: invention relates to industrial method for production of modified bitumen mastic. Claimed bitumen-polymer material contains (mass %) oil bitumen 60-70; synthetic resin 2-10; oil solvent and/or black oil 18-30; sulfur-containing compounds 0.5-5.0; and additionally oxyethylated alkylphenol as surfactant 0.1-5.0. Sulfated mixture of oil bitumen, synthetic resin, oil solvent and/or black oil treated for sulfitation at 140-2300C is used as sulfur-containing compounds. Method for production of said material also is disclosed.
EFFECT: polymer-modified bitumen mastic and sealing of improved quality; method for production of increased capability; inexpensive raw materials; energy-conversation technology.
6 cl, 3 ex, 4 tbl, 1 dwg
FIELD: polymer materials.
SUBSTANCE: invention relates to polyethylene molding mass with multimodule molecular weight distribution intended to manufacture hollow articles such as gas tanks, canisters, barrels, and bottles using extrusion. Molding mass has density at least 0.940 g/cm3, contains low-molecular polyethylene with viscosity index 40-150 cm3/g in amount 30 to 60%, high-molecular copolymer of ethylene with another C4-C10-olefin with viscosity index 150-800 cm3/g in amount 30 to 65%, and ultrahigh-molecular polyethylene with viscosity index in the region 900-3000 cm3/g in amount 1 to 30%. Molding mass is prepared by cascade-based suspension polymerization.
EFFECT: increased degree of blowing and improved balance between hardness and fissuring resistance.
3 cl, 2 tbl, 5 ex
FIELD: polymers.
SUBSTANCE: ethylenepropylene copolymer-base composition comprises dicumyl peroxide, bis-(tert.-butylperoxyisopropyl)benzene or 1,1-di-tert.-butylperoxy-3,3,5-trimethylcyclohexane as an organic peroxide and vinyltri-(methoxyethoxy)silane or polyphenylethoxysiloxane as an organosilicon additive. Except for, the composition comprises additionally a vulcanization co-agent taken among the group including low-molecular polybutadiene with the content of 1,2-links 20-80%, trimethylolpropane-trimethacrylate, triallyl cyanurate and quinone dioxime-1,4. Also, the composition comprises stearin, paraffin and zinc oxide. The composition shows high physical-mechanical properties, oil-resistance and dielectric properties. Invention can be used, in particular, in cable industry.
EFFECT: valuable properties of composition.
2 cl, 3 tbl, 8 ex
FIELD: composite materials on base of thermoplasts; injection molding of various parts, parts for railway engineering in particular: insulating bushes and locks of contact system, elastic insulating gaskets on wooden and concrete sleepers and busbars for switches.
SUBSTANCE: proposed polymer composition contains polyolefin, crumb rubber, synthetic ethylene propylene rubber and filler for micro-spheres from smoke emissions of thermal power plants; it also contains lubricant as additive. Mineral or vegetable oil at boiling temperature not below 180°C or low-molecular diane resins may be used as lubricant. Besides that, filler may contain talc. Use of smoke emissions of thermal power plant of preset composition and combination of components at definite ratio makes it possible to obtain molding compositions possessing high wear resistance, water resistance and oil resistance, low abradability at retained elasticity; increased service life.
EFFECT: enhanced efficiency.
4 cl, 2 tbl, 7 ex
FIELD: polymer materials.
SUBSTANCE: invention relates to technology of making oriented synthetic films and, specifically, to biaxially oriented polypropylene films, which invention may be utilized in manufacture of food packaging materials. Film is formed from at least polypropylene (co)polymer containing at least 0.8 wt % ethylene and optionally one or several C4-C10-α-olefins or from polypropylene composition containing at least 0.8 wt % one or several comonomers selected from ethylene and C4-C10-α-olefins. (Co)polymer or polymer composition have melting point above or equal to 155°C and less than 3 wt % fraction soluble in xylene at ambient temperature. Weight ratio of polymer fraction collected within temperature range 25 to 95°C to above-mentioned xylene-soluble fraction is superior to 8.
EFFECT: improved physicochemical properties of biaxially oriented polypropylene films.
7 cl, 1 dwg, 6 tbl, 9 ex
FIELD: chemistry of polymers, chemical technology.
SUBSTANCE: invention relates to a method for preparing thermoelastomers based on polyolefins and triple ethylenepropylene-diene rubber. The composition is prepared by the complete dynamic vulcanization of mixture of the following components, mas. p. p.: TSEPDR, 100.0; polypropylene, 25-60; low density polyethylene, 1-10; oil, 20-100; sulfur-accelerating vulcanization comprising the following components: sulfur, 0.1-2.0; thiuram, 0.1-1.5; Altax, 0.1-0.5; stearic acid, 0.1-20.0; zinc oxide, 0.5-8.0, or peroxide vulcanization comprising the following components: dicumene peroxide, 0.1-2.0; bis-maleimide, 0.1-2.5; novolacs alkylphenolformaldehyde resin, 0.2-10.0; organic phosphite, 0.02-1.0; pigment, 0.01-2.0; filling agent, 0.1-50.0; antioxidant, 0.1-2.0, and phthalate plasticizers, 0.5-10.0. The content of oil, polyethylene, phthalate plasticizers, novolacs resin and polypropylene is bound by the ratio. Invention provides enhancing thermostability, resistance against multiple temperature effects during the technological processing, resistance against harmful catalytic effect of metal with transient valence and improving the ecology of the process. Invention can be used in making elastic, atmosphere-resistant materials used in building industry, cable, automobile and light industries and in manufacturing different goods for consumption.
EFFECT: improved preparing method, valuable technical properties of composition.
30 cl, 4 tbl, 23 ex
FIELD: rubber industry; production of elastomer compositions on base of ethylene-propylene-diene rubber; production of roofing materials for hydraulic insulation of buildings, bridges, tunnels, roof coats.
SUBSTANCE: proposed rubber mix contains the following components: ethylene-propylene-diene rubber, butyl rubber or regenerate on base of butyl rubber, anti-oxidant, plasticizing agent (paraffin, mineral oil, chloro-paraffin), commercial carbon, chalk and/or kaolin and bitumen, colophony or benzoic acid, if necessary. Rubber mix may also contain Captax (rubber accelerating agent), thiuram or zinc ethyl diethyl dithiocarbomate, antimony trioxide, aluminum hydroxide, stearic acid and zinc oxide at definite ratio. Rubber mix is prepared on standard equipment of rubber industry.
EFFECT: enhanced resistance to burning and frost.
4 cl, 4 tbl
FIELD: polymer materials.
SUBSTANCE: invention relates to crystalline propylene copolymer-based compositions suitable to manufacture heat-weldable films and sheets. Composition according to invention contains 15-60% propylene copolymer having at least one C4-C8-α-olefin in amount 10-14% and 40-85% propylene copolymer having at least one C4-C8-α-olefin containing 14-30% of indicated C4-C8-α-olefin and optionally 0.5-3% ethylene, total proportion of C4-C8-α-olefin in propylene polymer-based composition being more than 10%. Melt flow rate MFR L of composition varies between 1 and 15 g/10 min. Such composition can be obtained by destroying composition-precursor prepared via stepped polymerization and containing the same components as above in the same proportions but having melt flow rate MFR L within a range of 0.1 to 5 g/10 min. Owing to combining two propylene copolymers containing more than 10% of C4-C8-α-olefins, composition possesses an useful balance of heat weldability, low content of fraction soluble in organic solvents, and optical properties (in particular very low turbidity and high brightness, and thereby good surface properties such as low tackiness and printing ability.
EFFECT: improved performance characteristics of material.
6 cl, tbl, 6 ex
FIELD: polymer materials.
SUBSTANCE: invention relates to thermoplastic elastomer composition of propylene polymers and to articles obtained therefrom by means of injection casting technique. Composition is characterized by melt flow rate value (MFR 2) as measured according ISO method 1133 at 230°C under loading 2.16 kg within a range of 3 to 30 g/10 min and contains: (A) 50 to 90 wt % one or several propylene polymers including at least 85 wt % of fraction insoluble in xylene at room temperature and selected from group consisting of random propylene-ethylene copolymers with 1-7 wt % ethylene, propylene/C4-C8-α-olefin copolymer with 2-10 wt % C4-C8-α-olefins, propylene-ethylene/C4-C8-α-olefin copolymers with 0.5-5 wt % ethylene and 2-6 wt % C4-C8-α-olefins; and (B) 10-50% propylene copolymer containing 8-40 wt % ethylene and optionally 1-10 wt % C4-C8-α-olefins. Above-mentioned melt flow rate value MFR 2 for composition is obtained by way of destroying composition precursor containing the same A and B copolymers in above-mentioned proportions but differing in melt flow rate value (MFR 1), which ranges from 0.1 to 5 g/10 min. while MFR 2/MFR 1 ratio varies between 1.5 and 20. Articles made from the composition are characterized by good flexibility, good resistance against impact loads even at low temperatures, good optical properties, in particular opacity, and low level of chemicals emission.
EFFECT: improved consumer's properties of articles obtained from composition.
6 cl, 2 tbl, 8 ex
FIELD: rubber industry; production of molded and non-molded mechanical rubber goods, delivery hoses in particular.
SUBSTANCE: rubber mix is prepared through co-vulcanization of triple combination of elastomers: butadiene-styrene, ethylene propylene diene, butadiene nitrile or polyisoprene in three different versions. Rubber mix contains sulfur, vulcanization accelerator, zinc white, dispersing agent, antiscorching agent, resin, plasticizing agent or softener, commercial furnace carbon. Rubber mix may also contain mineral filler, bitumen, plastics, antioxidant and/or moisture absorbing agent.
EFFECT: improved strength characteristics; enhanced economical efficiency, reliability and durability.
4 cl, 2 tbl, 10 ex
