Ebonite mix on base of butadiene styrene rubber
FIELD: manufacture of rubber articles on base of butadiene styrene rubber; manufacture of ebonite battery monoblocks.
SUBSTANCE: ebonite mix on base of butadiene styrene rubber contains reclaim, sulfur, diphenyl guanidine, magnesium oxide, kaolin, paraffin, phthalic anhydride with synthetic fatty acid, soap-surfactant, petrolatum oil and filler. Used as filler is ion-exchange resin -cationite KY-2 ground preliminarily to fraction of 1-40 mcm and taken in the amount of 180-360 parts by mass.
EFFECT: improved physico-mechanical parameters of vulcanizers; reduction of deficiency of rubber phase in ebonite; utilization of used ion-exchange resins.
The invention relates to the manufacture of rubber products based on the best choice of rubbers, in particular the production of plastic products - battery monoblocks.
Famous ebony mixture on the basis of the best choice of rubber (A.S. No. 1027178, publ. 07.02.83, bull. No. 25), including reclaim, sulfur, accelerators, slaked lime, softner, and ketogenic as filler, the mixture vulcanized at a temperature of 200-210°C for 5-10 minutes.
The disadvantage of this mix include the following: used as filler of natural material, subjected to special processing; conducting high-temperature and short-time vulcanization ebony mixture leads to destruction of the surface, uneven break the grid, resulting in the formation of cracks in the products; avoid use in the manufacture of large and thick-walled products.
Closest to the proposed invention is ebony mix based butadienestyrene rubber (A.S. No. 1004420, publ. 15.03.83, bull. No. 10), comprising a filler, representing a departure from the production Belko-vitamin concentrate (BVK) of paraffin oil.
We offer a mixture of partially eliminates the disadvantages of the above analogy, but in turn does not lack is nedostatkov: presence of waste in the production of PVC enough moisture (16-18 wt.%), which are not desirable in high temperature vulcanization due to the formation of porosity in the product; the residual protein content in the waste requires certain conditions of storage and the introduction of inhibitors of biodegradation; the complexity of the introduction of rubber of a large number of porous filler with a density of 0.38 g/cm3in the mixing equipment, as a result of declining performance not only due to the increasing volume of processed components, but also requires more time mixing to achieve a homogeneous mixture.
Technical objectives of this method are: the improvement of physico-mechanical properties of vulcanizates; the increase in the content of the filler in the ebony mixture to reduce the content of the expensive polymer phase; the disposal of spent ion-exchange resins in the manufacture of rubber products.
This object is achieved due to the fact that in ebonite mixtures based on the best choice of rubber, including reclaim CT, sulfur, diphenylguanidine, magnesium oxide, kaolin, paraffin, alloy phthalic anhydride with alcohols, soap, vaseline oil, as filler waste, what is new is that the filler used is pre-crushed to a fraction of a 1.0÷40,0 μm waste ion-exchange resin KU-2 - product copolyme is Itachi of styrene and divinylbenzene with grafted sulfopropyl in the amount of from 180 to 360 parts by weight of in the following ratio of components in ebony mixture, parts by weight:
|Alloy phthalic anhydride with SJK||2|
|Spent ion-exchange resin|
|fraction, µm: 1,0÷40,0 (KU-2)||180÷360|
The technical result is:
- achieving high physico-mechanical properties of vulcanizates obtained with the use of waste ion-exchange resins, which contain monomer units, similar to the best choice rubber;
- reducing the deficit rubber phase in ebonite mixtures;
- reduction of expenditure norms of sulfur vulcanization ebonite mixtures;
- the expansion of raw materials with the use of secondary resources in the production of rubber products, including battery monoblocks.
Experienced ebony CME and are made on a laboratory roll mill at a standard mode in accordance with the recipe, shown in table 1. As filler ebony mixture used waste ion-exchange resin, in particular lost functional ability of the cations: KU-2-8, KU-2-20 and KU-2-3, which represents a waste of the process of thermal power plant, nuclear power plants, and in the manufacture of the IC. Spent ion exchangers pre-ground in a laboratory ball mill, and then on the cage type A Riga Association "EX" with a capacity of 30 g/min and a rotor speed of 8000 rpm, which allows to obtain finely dispersed filler with a particle size of up to 1 μm. The separation of the fractions is carried out with the help of microset with a cell size of 80 μm, and the fraction 1÷40 μm obtained by sedimentation in water by sedimentation of larger particles of the cation.
From table 2 sample No. 6 (with the introduction of 360 parts by weight of the spent ion-exchange resin faction 1÷40 μm per 100 parts by weight of oil-filled rubber SKS-SARK-15) shows that plastoelastic indicators ebonite mixtures and physico-mechanical properties of vulcanizates based on them exceed the known values of hard rubber mixtures and vulcanizates, in addition to the parameters of plasticity on the Carrera and heat according to Martens which are observed at the level of the known samples to determine the boundary conditions in the recipe ebony mix: the number of regenera is a - 180 parts by weight of sulfur, and 50 parts by weight per 100 parts by weight of oil-filled rubber.
|Recipe prototypes ebonite mixtures|
|The composition of the mixture||The content of the mixture components, parts by weight|
|Known||Room test sample|
|anhydride with FLC**||2||2||2||2||2||2||2||2|
|the ion-exchange resin|
|fraction, µm: 1÷40||180||Ȋ|
|fraction, µm: 1÷40||270|
|Note. * The best choice in emulsion rubber SKS - ARKM-15 the oil content of MO-6 is 14.5-of 17.0 wt.%.|
|** SJK - synthetic fatty acid fraction17-C20|
|Plastoelastic indicators ebonite mixtures and physico-mechanical properties of vulcanizates based on them|
|Name||Quantitative values prototypes|
|The Mooney viscosity, usled||60-80||-||68||72||78||75||71||79||76|
|Fragility, MJ/m3||not less 0,065||0,067||0,075||0,075||0,070||0,110||0,095||0,070||0.060|
|Bending, MPa||not less than 21,0||28||34||33||32||39||32||29||26|
|Hardness, MPa||not less than 70.0||100||108||121||124||118||119||112||112|
|Heat according to Martens, °||not minee||66||68||66||66||69||65||66||62|
Ebony mixture of butadiene-styrene rubber, including reclaim CT, sulfur, diphenylguanidine, magnesium oxide, kaolin, paraffin, alloy phthalic anhydride with alcohols, Soaps, surfactants, liquid paraffin, and as filler - production waste, characterized in that the filler used is pre-crushed to a fraction of 1-40 μm waste ion-exchange resin is a cation exchange resin KU-2 is a product of copolymerization of styrene and divinylbenzene with grafted sulfopropyl in the amount of from 180 to 360 parts by weight in the following ratio of components in ebony mixture, parts by weight:
|diphenylhexane the Ying||2|
|alloy phthalic anhydride with SJK||2|
|soap is a surfactant||4|
|resin is a cation exchange resin KU-2 fraction, µm: 1-40||180-360|
FIELD: rubber industry.
SUBSTANCE: invention relates to rubber compounds used in tire manufacture, in particular to rubber compounds for manufacturing low-hysteresis treads of fuel-sparing tires showing improved bite properties. Reduced-density curable polydiene-based rubber compound comprises precipitated silica extender, silane binders, and target additives, said silane binders rubber compound containing triethoxysilyl-propyl-mercaptobenzothiazole sulfide combined with bis[3-triethoxysilyl-propyl] tetrasulfide at ratio between 0.3 and 3.3 and in summary proportion to percentage of precipitated silica extender between 0.097 and 0.133.
EFFECT: reduced hysteresis in tread rubber at 60°C, enhanced hysteresis and bite properties at 0°C and simultaneously reduced residual compaction after repetitive deformations and increased wear resistance of rubber.
2 tbl, 2 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
FIELD: production of rubber articles from rubber mixtures for manufacture of frost-resistant shock-absorbing rail fasteners.
SUBSTANCE: rubber mixture is produced by mixing of butadiene- styrene rubber having 22-25 weight parts of styrene, and synthetic cis 1,4-polyisopropene rubber of curing group, consisting of sulfur, N-cyclohexyl-2-benzthiazolyl sulphenamide, melt of w, w'-hexachlorparaxylene in shielding wax and N, N'-dithiodimorpholine, zinc oxide, synthetic fatty acids of C17-C20 fraction, N-phenyl-N'-isopropyl-n-phenylenediamine, petroleum bitumen, kaolin, technical-grade carbon, age resistor and plasticizer. Mixture additionally contains divinyl rubber with cis 1,4 link content of from 85 to 95 wt%, Vaseline oil and polymerized 2,2,4-trimethyl 1,2-dihydroquinoline.
EFFECT: increased frost resistance and improved resistance to formation and development of cracks.
FIELD: rubber industry.
SUBSTANCE: invention relates to synthetic rubber, rubber-technical articles and tire industry, namely, to compositions based on stereoregular polydienes. The composition based on "lanthanide" cis-1,4-butadiene rubber comprising a modifying agent that is represented by butadiene-styrene rubber prepared by the dissolved co-polymerization of butadiene and styrene monomers in the presence of a lithium-organic catalyst.
EFFECT: decreased plasticity of rubber.
2 tbl, 9 ex
FIELD: chemistry of polymers, chemical technology.
SUBSTANCE: invention relates to isobutylene-base polymeric composition, namely to mixtures of semicrystalline ethylene copolymers with brominated butyl rubber. Semicrystalline ethylene copolymers represent a statistic copolymer prepared from ethylene monomers, one or some other monomers taken among the order comprising alpha-olefins comprising from 4 to 10 carbon atoms and optionally one or some dienes. Semicrystalline ethylene copolymer comprises ethylene links in the amount, at least, 45 wt.-% as measured for mass of this semicrystalline copolymer. Polymeric composition is prepared by mixing isobutylene-base polymer and semicrystalline ethylene polymer and the polymeric composition can comprise additionally amorphous polymer, oil, low-molecular polybutenes, antioxidants, stabilizing agents, filling agents, pigments and carbon black. Prepared polymeric mass shows the stress value from 0.1 to 1 MPa at elongation of sample by 100% at 50°C, air penetrability of vulcanized mixture is less 8 x 10-8 cm3 x cm/cm2 x s x atm at 65°C.
EFFECT: improved properties of mixtures.
4 cl, 5 tbl
FIELD: organic chemistry, rubber industry.
SUBSTANCE: invention relates to a vulcanizing composition comprising rubber vulcanized with sulfur, sulfuric vulcanizing agent, accelerating agent taken among a group comprising of non-thiazolsulfenamide accelerating agents and agent providing stabilization of hardness that comprises derivative of pyrimidine of the formula (I):
wherein X represents hydrogen atom (H), radical from R1 to R4, NR3R4, OR5, SR5, SO2R6, M, (SO3)zM (wherein M represents metal ion); n and z can be similar or different and = 1, 2 or 3 depending on the corresponding valence of X and M = 1, 2 or 3; radicals from R1 to R4 are similar or different and taken among the group comprising of H, halogen atom, -OH, -NH2, alkyl, cycloalkyl, aryl, alkylaryl, alkylaryl, aralkyl and each among substitutes has optionally additional functional groups taken among the group consisting of -NH2, -OH, substituted amino-group, substituted hydroxyl, halogen atom and carbonyl-containing group; R3 and R4 in the same link in common with nitrogen atom (N) can form a heterocyclic group; R5 can mean any radical from R1 to R4 formed by carbon-base heterocyclic group comprising at least one sulfur (S) or nitrogen (N) atom or both S and N; R6 is taken among any radical from R1 to R4, -OH, -OM, -OR5, -NH2, NR3R4. The corresponding amount of accelerating agent and hardness stabilizing agent is effective in order to not inhibit vulcanization and to stabilize hardness property of indicated rubber after vulcanization. The amount of accelerating agent in indicated composition is above about 0.6 part per 100 parts of rubber when indicated rubber represents butadiene styrene rubber (SBR), and at least 0.5 part per 100 parts of rubber when indicated rubber represents the natural rubber, and the amount of the hardness stabilizing agent is at least about 0.5 part per 100 parts of rubber. Also, invention involves a method for enhancing hardness stabilization of the composition comprising rubber vulcanized with sulfur by addition of above indicated accelerating agents and pyrimidine derivative to the composition.
EFFECT: valuable properties of compounds.
28 cl, 8 tbl, 4 ex
FIELD: preparation of compositions for cables filling.
SUBSTANCE: the invention is pertaining to preparation of compositions for filling the cables used in the field of a distant data transmission. Prepare a composition containing (in mass %): a mineral or a synthetic oil - 70-90, the hydrogenated block of styrene and butadiene copolymer with radial structure - 2-15, polyethylene wax - up to 12. The block of the copolymer can be synthesized using silicon tetrachloride or stannic chloride. The technical result of the invention consists in improvement of the index of compositions drops-protection and a stability augmentation.
EFFECT: the invention ensures improvement of the index of compositions drops-protection and a stability augmentation.
7 cl, 2 tbl, 3 ex
FIELD: rubber industry.
SUBSTANCE: invention concerns a method for grafting polymers based on conjugated diene monomers to brominated butyl rubbers and using thus obtained grafted copolymers in rubber compositions, which, after vulcanization, acquire improved physical characteristics. Grafting procedure comprises mixing solid brominated butyl rubber with solid polymers based on conjugated diene monomer including some quantity of bonds C-S-(S)n-C with n being an integer equal from 1 to 7. Mixing is conducted at temperature above 50 over a period of time long enough to complete the grafting. Rubber composition containing above grafted polymer optionally includes one or more curing agents. Cured rubber composition is intended for manufacturing tracks.
EFFECT: increased shock-absorbing capacity of products.
14 cl, 5 dwg, 5 tbl, 3 ex
FIELD: chemical and petrochemical industries.
SUBSTANCE: the invention is pertaining to the field of chemical and petrochemical industries, in particular, to a polymeric composition and a method of its production. The method of production of a polymeric composition includes introduction of the maleinized polybutadiene containing from 10 up to 24 mass % of maleinic anhydride into a polymerizate, formed after termination of a synthesis of a block copolymer of A-B-A type and-or a block copolymer of (А-B)nX type, where "A" - is a vinylaromatic block, "B" - is a conjugated diene polymeric block, "X" -is a residue of a combining agent, "n" - is an integer equal from 2 up to 4, at a mass ratio of the indicated block of the copolymer and maleinized polybutadiene making 100 : (10-20). After that the target polymeric composition is separated from the reaction mass and dry up to the contents of the volatile impurities is no more than 0.2 mass %. The technical effect is development of a simplified method of production of a polymeric composition, which has an increased resistance against a multiple bending and an increased adhesion.
EFFECT: the invention ensures a simplified method of production of a polymeric composition with increased resistance against a multiple bending and an increased adhesion.
4 cl, 6 ex
FIELD: textile industry.
SUBSTANCE: invention relates to manufacture of nonwoven fabrics possessing sorption ability and can be used in making various-modification filters suitable for cleaning liquid media. Impregnating composition contains blend constituted by latexes based on rigid chain- and flexible chain-nature copolymers taken at ratio between 95:5 and 50:5, respectively, solid filler, and water, wherein ratio of all components is expressed as 1:(2.5-3.0):1. Composition is obtained by mixing and vibration action in resonance mode at frequency 50-150 Hz and action time 5-15 min.
EFFECT: increased aggregative stability of composition and physicomechanical properties of material with no additional components added.
2 cl, 2 tbl, 6 ex
FIELD: rubber industry and building materials.
SUBSTANCE: invention relates to production of roofing material used to manufacture soft roofs of buildings and constructions. Composition for production of roofing material contains waste of butadiene/styrene rubber coagulum and/or structured wastes from butadiene/styrene rubber production, or waste of butadiene/styrene rubber coagulum and structured wastes from butadiene rubber production, industrial oil waste, chalk, carbon black (P-234, P-514, P-803), and sulfur, all in specified proportions. Roofing material is obtained via preparing rubber composition by mixing subjected to heat treatment at 75-85°C for 10-12 days.
EFFECT: improved physicochemical and performance characteristics of material.
2 cl, 2 tbl, 11 ex