FIELD: chemistry; rubber industry.
SUBSTANCE: invention pertains to rubber mixtures based on fluoroprene, used for making rubber goods, which can work in conditions affected by fuel and used in the motor-car industry. The rubber mixture consists of a vinylidene fluoride terpolymer and tetrafluoroethylene, magnesium oxide, calcium hydroxide, technical carbon T-900, di-(4hydroxyphenyl)dimethylmethane, pentaerythritol tetrastearate, dibutyl sebacate and a catalyst. The catalyst used is in the form of guanidine quaternary salts, and more specifically, guanidine bromide or chloride. The catalyst is a compound obtained from interaction of phenyl-bi-guanidine hydrochloride or hydrobromide with lower bromide or ethyl chloride, with molar ratio of 1:7 in the presence of a base. The catalyst is taken in percentage mass ratios of 0.5-0.7% at 100% mass of terpolymer.
EFFECT: increased rate of vulcanisation of rubber mixtures; wide range of catalysts for fluoroprene.
3 tbl, 2 ex
The invention relates to the development of rubber compounds based on silicone elastomer used for the manufacture of rubber products (rings, gaskets, fuel hoses), working in the conditions of influence of fuel used in the automotive industry.
Known rubber compound using for vulcanization of ftorkauchukov copolymers of hexaferrite with vinylidenefluoride, as well as other ferreirae catalysts (accelerators) of compounds such as Nitron and their salts, crown ethers (Nudelman Z.N., Lavrov L.N., Dontsov A.A. Vulcanization ftorkauchukov acid reagents. Rubber & rubber, No. 10, 1983, p.40-41).
In rubber mixtures based ftorkauchukov as catalysts can be used other compounds, namely, Quaternary ammonium, postname and archieve salt (Nudelman Z.N., Lavrov L.N., Dontsov A.A. Vulcanization ftorkauchukov acid reagents. Rubber & rubber, No. 10, 1983, p.40-41; RF Patent 2097393, 27.11.1997).
Famous recipe rubber compound 4930 - 103, intended for manufacturing of range of the fuel hose low toplivopriemniki with an inner diameter of 7,94-15,5 mm, corresponding to the standard Euro 3 (TU 2556-119-00149289-2001, THE 305-57-089-95) based on fluoro GFR-264/3 (terpolymer of vinylidenefluoride, hexaferrite and tetrafluoroethylene), according to the ARTICLE the 044-410-2003. The rubber mixture contains fluoropolymer elastomer GFR-264, binding di-(4 oksifenil)dimethylmethane (bisphenol a), a catalyst bromide octamethyltetrasiloxane, magnesium oxide MgO RA-150, calcium hydroxide Caldic 2000, dispersers Aflux-54 (tetrastearate pentaerythritol) and dibutylsebacate, carbon black T-900 (N.G. Morozova, martyusgov GG, Kochetkova, GV, Sokolov V.E., Ganina T., Konovalov TR, Pichhadze SJ "Rubber compound rubber-based GFR-264 for internal camera hoses low toplivopriemniki." (In the collection "XII international scientific-practical conference. Rubber industry. The raw materials. Materials. Technologies". M.: OOO "STC NISP". 2006. - c.129-130)).
The closest analogue is the rubber mixture on the basis of high and low molecular weight copolymers of vinylidenefluoride with HEXAFLUOROPROPYLENE containing carbon (carbon black) and mineral (barium sulfate) fillers, crosslinking agent, bisphenol a, magnesium oxide, calcium hydroxide, catalyst triphenylmethylchloride, dispersant therapeutically pentaerythritol (RF Patent 2220989 C2, 10.01.2004) prototype. This rubber compound is enough technology, however, requires increasing the rate of vulcanization.
The technical result of the invention is to increase the rate of vulcanization of the rubber mixtures based Tripoli the development of vinylidenefluoride, hexaferrite and tetrafluoroethylene and expanding Arsenal of substances having catalytic activity to perkowska in the process of vulcanization.
This technical result is achieved by creating a rubber mixtures based terpolymers of vinylidenefluoride, hexaferrite and tetrafluoroethylene, in which the catalyst used Quaternary salt biguanidine General formula:
where Hal Is Cl, Br.
EXAMPLE 1. The synthesis of the salts biguanidine.
1 pray hydrochloride phenylpyrimidine add 7 moles bromatologia ethyl, boiled for 4 hours in a water bath in the presence of a base (NaOH 30% aqueous solution), the reaction mixture cooled down to room temperature, the precipitate was separated and crystallized from benzene. Get the connection
the number of 363 g (the yield of the target product, 80%) as a grey amorphous powder with a melting point 120-123°C.
Elemental analysis data. C22H40N5Br, calculated, %: C - 58,15; N - 8,81; N - 15,41; Br - 17,62, found, %: C - 57,85; N At 8.60; N - 15,51; Br - 17,37.
An NMR spectrum1H recorded on the instrument Bruker WM-250, solvent DMSO-d6, internal standard TMS: 1,03 ppm soof 1.13 ppm, soof 1.27 ppm, sois 3.08 ppm sq 3,37 ppm USSof 3.85 ppm sq7,21-7,30 PM (3H, C6H5), 7,40-7,50 m (2N, C6H5).
Similarly receive the connection
showing similar catalytic activity.
As the catalyst of comparison we used the connection:
The kinetic characteristics of the process of vulcanization of the rubber mixture 4930 for the various catalysts are shown in table 1.
Comparison of the kinetic characteristics of cured using salt I, II and III shows increased speed of vulcanization for salt I and II in comparison with salt III (prototipo).
The kinetic characteristics of the investigated rubber blends (Rheometer of the company "Monsanto", 175°C for 12 min, the amplitude of the oscillations of the rotor 3°)
|Index||I bromide biguanidine||II chloride biguanidine||III bromide actualitate-aminophosphine (prototyp)|
|Note: ts2min - the start time of vulcanization,|
MminN·m - minimum torque,
MmaxN·m - maximum torque
t'90, min - time optimum vulcanization,
t'50, min - time 50% vulcanization.
EXAMPLE 2. Analysis of rubber compounds.
The object of research was the rubber mixture 4930 according to the recipe, parts by weight, % on 100 parts weight of rubber: SCF-264 (terpolymer of vinylidenefluoride, hexaferrite and tetrafluoroethylene) - 100%, magnesium oxide - 3%, calcium hydroxide - 6%, carbon black T-900-30%, Aflux-54 (1.5%), dibutylsebacate - 1.5%), bisphenol a is 1.5%, the catalyst is 0.5%.
The mixture is prepared in the mill according to the following mode: roll rubber GFR-264 for 1 min, then injected into the rubber sequentially magnesium oxide (5 min), calcium hydroxide (7 min), carbon black (6 min), bisphenol a (5 min), the dispersant (5 min) and the catalyst (6 min).
The mixture is prepared by passing it 3-4 times through the rollers with a gap between the rollers 0.5-0.8 mm, resulting in the preparation of a thickness of 3 mm, which is then spazout on extrusion equipment in the manufacture per the CSO layer (inner chamber) fuel hoses thickness 0,4-0,8 mm
The compositions of the samples investigated rubber blends are given in table 2 and the results of their physico-chemical tests in table 3.
As can be seen from table 3, the inventive rubber mixture has the technical characteristics correspond to the norm, and conditional tensile strength and relative elongation superior to the prototype.
The samples investigated rubber blends
|№ p/p||Ingredients||The contents of the ingredients, parts by weight|
|1||Terpolymer of vinylidenefluoride, hexaferrite, tetrafluoroethylene||100||100||100||100||100||100|
Physico-mechanical properties of rubbers THAT 2556-119-00149289-2001, THE 305-57-089-95
|1||Hardness according to ISO, the international unit IRHD||75±5||73||75||72||74||76||75|
|2||Conditional tensile strength of not less kgf/cm2||61||67||68||69||70||60||65|
|3||Elongation at break, %, not less than||160||168||180||200||210||170||167|
|4||Relative residual deformation when compressed by 25% after 24 hours at 100°C, %, max||50||48||45,6||46,9||44||53||55|
The rubber mixture, comprising terpolymer of vinylidenefluoride, hexaferrite and tetrafluoroethylene, a crosslinking agent di(4 oksifenil) dimethylmethane, vulcanization activators - magnesium oxide and calcium hydroxide, the filler is carbon black T-900, dispersers - tetrastearate pentaerythritol and dibutylsebacate, the catalyst is a Quaternary salt biguanidine, namely bromide, biguanidine or chloride biguanidine connection, obtained by the interaction of the hydrochloride or hydrobromide phenylpyrimidine with methyl or ethyl chloride, respectively, in a molar ratio of 1:7 in the presence of a base in the following ratio of components, rubber compounds, parts by weight:
|terpolymer of vinylidenefluoride, hexafluoro Elena|
|the specified catalyst||0,5-0,7|
SUBSTANCE: invention proposes composition polymeric material of tribotechnical designation based on polytetrafluoroethylene, coke and activated magnesium spinel and can be used in machine and mechanisms heavy-loaded friction units. The composition polymeric material comprises the following components, wt.-%: coke, 13.0-14.5; magnesium spinel activated in planetary mill AGO-2 for 2 min, 0.5-2, and polytetrafluoroethylene, the balance. Using the invention allows enhancing longevity and working ability of friction units based on high abrasion resistance, low friction coefficient that are determined by the composition structure.
EFFECT: improved and valuable properties of material.
FIELD: polymer materials.
SUBSTANCE: invention provides polymer composition containing one or several halogenated thermoplastic polymers and being characterized by RMFI between 1.1 and 6, where RMFI is ratio of melt flow indexes MFI8/2 and MFI0.3/1 measured in accordance with standard ASTM D1238. Invention also discloses preparation method and use for these compositions.
EFFECT: enabled preparation of compositions exhibiting a rheological property (stretching viscosity), which is characterized by elevated resistance to deformation during foaming.
14 cl, 2 dwg, 3 tbl, 8 ex
FIELD: polymer materials.
SUBSTANCE: invention relates to polymer mixture for use in membrane manufacture. Mixture contains (i) at least one acrylic polymer or at least one acrylic polymer and at least one vinyl polymer, which polymers comprise at least one ionic or ionizable group, in particular sulfurized group, and (ii) at least one thermoplastic fluoropolymer, provided that components (i) and (ii) differ from each other. Invention also related to polymeric ionic membrane, membrane electrode complex, fuel cell, battery, and to a polymer mixture and composition preparation process.
EFFECT: enabled production of fluoropolymer uniformly mixing with other polymers, enabled manufacture of membrane directly from aqueous fluoropolymer dispersions, and increased chemical resistance and mechanical strength of membranes.
25 cl, 5 tbl, 13 ex
FIELD: polymer materials.
SUBSTANCE: composition contains, wt %: vinylidene fluoride 20-40, methyl methacrylate homopolymer or copolymer, acryl elastomer 5-18, and UV-absorbing substance 1-4. Invention also discloses jointly extruded films (options) and substrates covered by these films. Invention enables preparing composition with not rising UV-absorbing substances and manufacturing films showing high mechanical strength and providing high-quality adhesion to substrate while being resistant to radiation.
EFFECT: improved consumer's properties of films.
14 cl, 7 ex
FIELD: polymer materials.
SUBSTANCE: invention provides elastic and resilient composition containing (A) at least one homopolymer of vinylidene fluoride or copolymer of vinylidene fluoride with at least one other monomer capable of being copolymerized with vinylidene fluoride wherein proportion of this other monomer ranges between 0 and 30 wt parts per 100 wt parts vinylidene fluoride, (B) at least one fluorinated elastomer, which is copolymer of vinylidene fluoride and at least one other fluorinated monomer, and optionally (C) plasticizer. Composition is characterized by that, on the one side, it contains 0.5 to 10 wt parts B and 0 to 10 wt parts C per 100 wt parts A, provided that B+C = 0.5 tp 10.5 wt parts, and, on the other side, such vinylidene fluoride homopolymer or copolymer is chosen in such a way that it has coefficient of fluidity below 5 g/10 min, as measured according to standard ISO 1133 at 230°C under load 5 kg, and critical modulus G ranging between to 5and 22 kPa, as measured in intersection of shear moduli G' and G" in molten state at 190°C.
EFFECT: essentially increased stability of composition in air and in crude oil.
7 cl, 6 tbl, 12 ex
FIELD: inorganic chemistry.
SUBSTANCE: invention refers to polymer chemistry particularly to polyurethanes and foamed polyurethanes processing technologies. Described method of all-purpose metal-complex modifier for polyurethane implies solution of metal halogenide in solvent. This method is characterized by solution of metal halogenide having variable valence of stable oxidation level, for example manganese chloride (II) tetrahydrate, in N,N-dimethylethanolamine and ε-caprolactam at mole ratio of metal halogenide: dimethylethanolamine: ε-caprolactam 1:5:5-20. Modifying agent is added to laprole component. Polyurethanes produced with modifying agent are characterized by improved physical-mechanical properties such as ultimate breaking stress, rigidity at deformation 40% and comfort coefficient.
EFFECT: production of polyurethanes with improved physical-mechanical properties; increased comfort coefficient rigidity and ultimate breaking stress.
1 cl, 6 tbl
SUBSTANCE: invention refers to size control method for disperse particles in thermoplastic elastomer composition. Disperse particle size control method includes mixing in melt of the following: (A) halogenated isobutylene elastomer, (B) polyamide, (C) dispersion supplement, and (D) traditional additives. Resulting mixture is subjected to dynamic vulcanization thus forming dynamically vulcanized resin mix; halogenated isobutylene elastomer is dispersed in polyamide matrix at volume-averaged diameter of dispersion particles Dv from 0.01 to 2.5 μm.
EFFECT: thermoplastic elastomer composition with controllable size of disperse elastomer particles and improved durability and impermeability.
8 cl, 2 dwg, 3 tbl, 13 exrsid7429359
SUBSTANCE: invention relates to rubber-processing industry, in particular, to formula of non-vulcanisable polyisobutylene-based rubber composition, and can be used for manufacturing highly acid-, alkali- and oxidant-resistant sealing materials, as well as sheet anti-corrosive and waterproofing materials for chemical equipment and built structures. Non-vulcanisable rubber composition contains, parts by weight: polyisobutylene P-200-100, when required, semi-active technical grade carbon P-514-0-10, inactive inorganic filler - talcum powder, kaolin or mixture thereof -250-370, rubber resin SKD-2-10-20.
EFFECT: less adhesion to working surfaces of rubber-processing equipment; improved physical and chemical properties, corrosion resistance of the composition being retained.
6 tbl, 3 ex
FIELD: chemistry of polymers.
SUBSTANCE: invention proposes a polymeric composition for preparing film materials, linoleum, insulation, protective envelopes, wires, cables and other articles of technical designation. The composition comprises polyvinyl chloride, lime, lithopone, soda, complex plasticizing agent consisting of dioctyl phthalate and product prepared by interaction of higher fatty chlorinated acids of the general formula: R(CHCl)nCOOH wherein R means aliphatic radical comprising 9-22 carbon atoms; n = 1-4 that represents chloroparaffin oxidate CHP-30 in chloroparaffin CHP-30 medium and ethyl or butyl alcohol taken in the mass ratio = 5:1. Invention provides enhancing capacity for plasticity, physicomechanical properties of polymeric materials, expanding assortment of plasticizing agents and reducing toxicity of polymeric composition.
EFFECT: improved and valuable properties of composition and articles.
FIELD: polymer materials.
SUBSTANCE: thermoplastic elastomer composition contains dynamically vulcanized mixture of partially vulcanized halogenated isobutylene elastomer, polyamide, and conventionally utilized additives, wherein stretching elasticity modulus at 100% elongation for elastomer distributed in polyamide is less than 0.60 MPa and wherein halogenated elastomer is, in particular, brominated or chlorinated one. Preparation of thermoplastic elastomer composition involves dynamic vulcanization of halogenated isobutylene elastomer, polyamide, and conventionally utilized additives at temperature lower than 185°C.
EFFECT: improved durability and flexibility of composition.
11 cl, 2 tbl, 2 ex
FIELD: chemistry of polymers.
SUBSTANCE: invention relates to preparing shock-resistant antifreeze polypropylene compositions. The shock-resistant antifreeze composition comprises the following components, wt.-%: isotactic polypropylene, 77.0-85.7; elastomer, 14.0-18.0, wherein poly-1-octene with the intrinsic viscosity value in the range from 4.0 to 12.0 dl/g is used; thermostabilizing agent, 0.1-0.5, and special additives, the balance. Shock-resistant antifreeze polypropylene composition is characterized by improved melt fluidity indices that providing the improved processing capacity. Invention can be used in automobile manufacture, building and light industry for production of articles of technical designation exploited at reduced temperatures.
EFFECT: improved and valuable technical properties of composition.
2 tbl, 7 ex
FIELD: polymer materials.
SUBSTANCE: invention relates to vehicles and lifting-and-shifting machines as well as to allied technical fields wherein friction phenomenon is used to achieve a positive effect. Composition according to invention contains, wt %: binder based on rubbers SKI-3 and SKD 11.5-13.0, wollastonite 50.0-54.5, barite 23.5-24.5, graphite 3.0-3.7, carbon black 1.5-1.9, sulfuric curing system: sulfur 3.5-4.5, captax 0.2-0.5, thiuram 1.2-1.7, zinc oxide 0.3-0.7, and, above 100%, modifier selected from group: stearic acid, oleic acid, stearic acid/oleic acid mixture at ratio between 40:60 and 0.02:0.5 or above mixed modifier with terephthalic acid in total amount 3 wt parts or stearic acid in amount 0.02-0.5 wt parts per 100 wt parts rubber mixture.
EFFECT: improved physicochemical properties and reduced rheological characteristics of composition.
2 tbl, 2 ex
FIELD: chemistry of polymers.
SUBSTANCE: invention relates to an elastomeric composition that can be used in making pneumotires or intermediate products for pneumotires. The composition is based on at least one diene elastomer, inorganic filling agent as an enhancing filling agent, polyfunctional organosilane, namely hydroxysilane of the general formula (I) given in the invention description as a binding agent (for system inorganic filling agent/diene elastomer) comprising at least two functional groups designated as "X" and "Y" that can be grafted to elastomer by one side using function X, and to inorganic filling agent by other side using function Y that represents hydroxysilyl function (≡Si-OH) and wherein organosilane is represented by hydroxysilane polysulfide of the general formula (I), and wherein the amount of inorganic enhancing filling agent is from 10 to 200wpe (weight parts per 100 weight parts of elastomer), and the amount of hydroxysilane polysulfide is in the range from 1 to 20wpe. Also, invention relates to a method for preparing the claimed elastomeric composition showing the improved kinetics of vulcanization by thermomechanical stirring components of the composition for one or two steps up to achievement of maximal temperature from 110 to 190°C. Also, invention relates to using this composition for manufacturing pneumotires or intermediate products designated for pneumotires, for example, protectors, sublayers, sides and so on, and to a pneumotire and an intermediate product for pneumotire containing such elastomeric composition, to a protector for pneumotire made of this composition and to pneumotire containing such protector. Also, invention relates to using a polyfunctional organosilane as a binding agent and to a method for binding inorganic and diene elastomer in an elastomeric composition by polyfunctional organosilane. The claimed elastomeric composition provides satisfactory reserve of safety with respect to the burning problem, it possesses a lower value of Mooney plasticity resulting to good ability for treatment in crude state and possesses the improved hysteresis properties and the improved the conversion constant rate and therefore vulcanization can be carried out for significant shorter time. Protectors made of the proposed composition possess low resistance to rolling motion and enhanced abrasion resistance.
EFFECT: improved and valuable properties of mixture.
32 cl, 2 tbl, 2 dwg
FIELD: manufacture of building materials; manufacture of building parts, articles and structures for encapsulation of radioactive and highly toxic waste.
SUBSTANCE: proposed composition contains the following components, mass-%: sulfur, 53.27-53.32; ground quartz sand at specific surface of 180 m2/kg, 45.4-45.50; kerosene, 1.06-1.07; rubber CKДH-H, 0.22-0.11. Encapsulation is carried out by combining the composition with waste followed by hardening. Containers may be also made from composition for burying the waste in geological formation.
EFFECT: reduced water absorption at retained high compressive strength.
FIELD: biologically active polymer materials.
SUBSTANCE: invention relates to polyethylene compositions showing bactericidal activities and intended for manufacture of various products through molding and extrusion while being suitable for fabrication of nontoxic packing materials for foods and medical tools, for fabrication of medical- and sanitary-destination molding equipment, toys, furniture, plates and dishes, fibers, and textile articles. Composition according to invention comprises high-pressure polyethylene (71.00-99.04%) and bactericidal additive, the former containing 0.10 to 5.00% silver phosphate, silver thiosulfate, or silver stearate. Composition further contains 0.06 to 1.00% of oleic acid amide (Finawax O), 0.20-2.00% calcium carbonate (Omyacarb 2XKA), 0.50-20.00% ethylene/vinyl acetate copolymer, and 0.10-1.00% silica.
EFFECT: imparted high bactericidal activity extending functional qualities of composition allowing use thereof in various industry fields.
3 cl, 5 tbl, 4 ex
FIELD: phenoplast production, in particular casting composition for technical applications.
SUBSTANCE: claimed casting composition included (mass %): novolac phenol-formaldehyde resin 47-49.3; wood powder 28.4-29.5; urotropine 7.1-7.4; kaolin 3.2-3.4; burnt magnesia 0.7-0.9; nigrosine 1.4-1.5; talk 3.7-3.9; naphthalene 1.9-2; stearin 0.2-0.4; calcium stearate 0.4-0.6; polyethylene wax 0.5-0.7; phosphoric acid triphenyl ester 1-5. Composition of present invention has increased destructive torque stress and decreased viscosity coefficient at 120°C and shear velocity gradient of 15 l/s.
EFFECT: composition with increased destructive torque stress and decreased viscosity coefficient.
4 ex, 1 tbl