Butadiene-nitrile rubber based adhesive composition
SUBSTANCE: butadiene-nitrile rubber based adhesive composition contains phenol formaldehyde resin, polyvinylchloride resin which is chlorinated or chlorinated isopreprene rubber, zinc oxide, magnesium oxide, organic solvent and filler. The filler is a mixture of lignocellulose polydispersed fibre materials and ethyl cellulose. The lignocellulose polydispersed fibre materials are wastes from textile industry, wood chemical and/or cellulose and paper production.
EFFECT: composition increases adhesion strength of various substrates and improves thixotropic properties.
4 tbl, 2 ex
The invention relates to compositions of adhesive compositions based on butadiene-nitrile rubber (BOC) and can be used in rubber, footwear, automotive industry, furniture industry, construction industry and in other fields.
Known adhesive composition comprising polychloroprene and/or butadiene-nitrile rubber, adhesive additive, water, zinc oxide, magnesium oxide, filler, vulcanizing agent, calcium stearate, chlorinated polyvinyl chloride, phthalic anhydride, an organic solvent (U.S. Pat. 2063994 Russia, IPC 09J 111/00; publ. 20.07.1996).
However, this adhesive composition has insufficient adhesion and thixotropic properties.
The closest in technical essence to the invention is an adhesive composition, which includes the NBR SKN-26, as increasing adhesive-cohesive strength additives - phenol-formaldehyde resin, PVC resin chlorinated or chlorinated isoprene rubber, zinc oxide, magnesium oxide, as the filler is silicon dioxide, the solvent - ethyl acetate (U.S. Pat. 2078108 Russia, IPC 09J 109/02; publ. 27.04.1997).
However, this adhesive composition has insufficient bond strength.
The technical result consists in increasing the adhesion to various substrates and the improvement in t is stropnik properties.
The technical solution of the invention is an adhesive composition based on butadiene-nitrile rubber containing phenol-formaldehyde resin, PVC resin chlorinated or chlorinated isoprene rubber, zinc oxide, magnesium oxide, the solvent is ethyl acetate, used as a filler mixture of lignocellulosic polydisperse fibrous material and a thermoplastic derivative of cellulose (ethyl cellulose) in the following ratio of components, mass:
|Resin chlorinated polyvinylchloride/|
|Chlorinated isoprene rubber||10,0-30,0|
Lignocellulosic polydisperse fibrous materials (LC is M) represent a waste of the textile industry, resin and/or pulp and paper production from white to light gray in color, insoluble in ethyl acetate. Composition: 30-45 - 97-98% cellulose, 2-3 - 55-70% lignin.
Ethylcellulose (EC) polydisperse molecular weight (from 100 to 500 thousand) and the particle sizes of the powdery filler is white with a yellowish tinge, TPL=170-190°C solubility in EA no more than 5%.
The ratio LCWM/EC in the composition of the filler can vary from 1/5 to 5/1.
Examples of execution of the invention.
Example 1. The adhesive composition is prepared as follows. First, cook the rubber mixture containing 100 mass nitrile butadiene rubber, 4 mass of magnesium oxide and 5 mass of zinc oxide, 10 mass filler on the rolls for 15 min at 40°C. Then heated rubber mixture from 43.5 mass ethyl acetate is clearesult, mix until smooth. Remaining solvent (391,5 MASC) with 30 mass phenol-formaldehyde resin, 10 mass resin chlorinated polyvinylchloride/chlorinated isoprene rubber boot portions in clearesult. Total time clemmesen is 4.5-5 hours
The obtained adhesive composition is applied to the bonding substrates, representing cotton cloth, tarpaulin. The duplicate samples, and adhesive bonding characterize the strength of the bonding.
Examples 2-6 are prepared analogously to example 1, but as filler take LCWM/EC specified in table 1 ratio.
Table 1 shows the compositions of all tracks.
The adhesive composition is a liquid from light brown to dark brown. Adhesive tech, well-applied to the surface of the substrate. The viability of glue - not less than 6 months.
The strength of the bonding of the substrates when the delamination is assessed according to the GOST 6768-75.
In tables 2,3 and results of the tests of adhesive compositions.
Have been investigated by various content filler LCWM/EC - 1/1 (table 3).
The stated limits 50,0-20,0 mass 100 mass elastomer due to the fact that when you increase or decrease the indicated dosages bond strength decreases.
It is established that the optimum filler content of 10.0 mass 100 mass elastomer that provides the best results.
|Component||The content of components in the composition, mass|
|Resin chlorinated polyvinylchloride/Chlorinated isoprene rubber||10,0||10,0||20,0||20,0||10,0||10,0||10,0|
|Prototype silicon dioxide||-||-||-||-||-||-||20,0|
|The ethyl acetate||435,0||435,0||435,0||435,0||400,0||400,0||435,0|
|Time to test the concatenated sample||The bond strength rubber-rubber, kN/m|
|The proposed composition||The placeholder|
|Justification the boundary limits|
|The adhesive composition No. 1|
|Content filler||The bond strength rubber-rubber, kN/m|
|The strength of bonding of various substrates|
|Substrates||The proposed composition of the Sabbath.|
|The placeholder||No. 1||No. 2|
Thus, as can be seen from tables 2-4, the use of adhesive compositions based on butadiene-nitrile rubber as a filler mixture of lignocellulosic polydisperse fibrous material and a thermoplastic derivative of cellulose (ethyl cellulose) can improve the strength of bonding of various substrates ~ 40%; and improve the thixotropic properties of adhesive is applied and distributed on the surface of the substrate.
Adhesive composition based on butadiene-nitrile rubber containing phenol-formaldehyde resin, PVC resin chlorinated or chlorinated isoprene rubber, zinc oxide, magnesium oxide, as a solvent which is
the ethyl acetate, characterized in that the filler is a mixture of lignocellulosic polydisperse fibrous material and a thermoplastic derivative of cellulose (ethyl cellulose) in the following ratio of components, parts by weight:
|Resin chlorinated polyvinylchloride/|
|Chlorinated isoprene rubber||10,0-30,0|
FIELD: application of adhesive underlayers (adhesive primers) on base of chlorine-containing rubbers on base of natural isoprene, butadiene, butadiene nitrile, styrene-butadiene, chloroprene and butyl rubber to metal in the course of vulcanization; manufacture of rubber metal articles for automobile industry.
SUBSTANCE: proposed adhesive underlayer includes chlorinated natural rubber, fillers, stabilizer, solvent, phenol resin, resol-type phenol formaldehyde resin, wetting agent and urotropin. Used as solvent is mixture of xylol with methyl isobutyl ketone.
EFFECT: enhanced strength of attachment of rubber to metals; enhanced corrosion resistance; low cost of product; absence of toxic solvents.
SUBSTANCE: invention refers to adhesive polymer composite material, method of production thereof, product keeping its shape, and hermetic or adhesive composition containing mentioned composite material used in automotive engineering, constructional engineering, wood working, printing industry, footwear industry, as well as in sealing materials and insulation substance. The task in view is solved due to application of polymer composite including at least one hydrogenated or nonhydrogenated polymer nitrile rubber with Mooney viscosity (ML 1+4 at 100°C) less than 30 at least one cross-linking agent or vulcanizing system, and if required at least one bulking agent. Hydrogenated or nonhydrogenated polymer nitrile rubber is derived from metathesis reaction of polymer nitrile rubber with one or several compounds of general formulas I, II, III or IV. If required it is followed by hydrogenation.
EFFECT: development of composite material with long adhesive capacity, elasticity and thermal stability.
9 cl, 3 tbl, 3 ex
SUBSTANCE: composition is a mixture of filler - discrete basalt fibre with fibre diametre of 9-12 mcm and length of up to 1000 mcm with binder - epoxyvinylether resin EVS-9133. Concentration of said filler in the mixture is 30-70 wt %.
EFFECT: high temperature resistance of material hardened with disclosed composition, high wear resistance in a liquid medium containing abrasive material and in dry friction conditions, chemical resistance during operation in aggressive media, reduced probability of scaling on the surface, simple formulation, cheap preparation and wide range of compositions.
1 tbl, 7 ex
SUBSTANCE: invention can be particularly used in the cable industry when making electrical cable shielding used in explosive environments, in electrical engineering when making working sheath of earthing electrodes in general-purpose protective earthing systems, protection from static electricity and electrochemical protection from corrosion in the ground, fresh and sea water etc. The rubber mixture contains the following in pts. wt: synthetic ethylenepropylene diene rubber 90-100, technical sulphur 0.3-0.5, paraffin-naphthalene oil 10-15, bis-tertbutylperoxyisopropyl benzene 5.0-6.5, zinc oxide 5-8, electroconductive technical carbon 80-100, carbon-fibre material made from hydrocellulose fibre 15-25. The electrical current conductor comprises at least one conductor which has a shielding or working sheath made from the said rubber mixture.
EFFECT: improved operational characteristics of the electroconductive rubber mixture and electrical current conductors made from the said mixture.
4 cl, 2 tbl, 3 ex
SUBSTANCE: invention relates to filled polymer compositions used to make electrically insulating friction bearings. The antifriction dielectric composition contains 50-60 wt % fabric with surface density of 180-220 g/m2 made from polyphenylene 1-3-4-oxadiazole thread with thickness of 80-110 tex and 40-50 wt % polymer binder - chlorine-containing polyglycidyl arylene diamine epoxy resin.
EFFECT: composition has good physical and mechanical, tribotechnical and dielectric properties and is characterised by high dimensional stability when used in water.
1 tbl, 10 ex
SUBSTANCE: invention relates to preparation of filled polymer antifriction compositions which used to make friction bearings of impellar blades of adjustable-blade turbines. The composition contains reinforcing fabric made from carbon fibre with average size of crystals on the basal plane of 3.0-6.0 nm and thickness of the packet of basal planes of 1.0-4.0 nm, thermosetting polymer binder based on chlorine-containing polyglycidyl arylene diamine resin and polytetrafluoroethylene inclusions with thickness of 2-4 mm and surface area of 4-9 mm2, total surface area of which makes up 10-30% of the surface area of the composition. The method of preparing the composition includes a step for adding a surface layer of polytetrafluoroethylene inclusions. Longitudinal and transverse 2-4 mm deep grooves are cut on a solid workpiece made from polytetrafluoroethylene. The surface layer of the workpiece with inclusions cut on a lathe is activated through treatment with a sodium naphthalene complex, joined through projections inside with carbon fabric which is saturated with chlorine-containing polyglycidyl arylene diamine resin. After combined pressure moulding, a surface sheet made from polytetrafluoroethylene is cut, leaving inclusions from polytetrafluoroethylene in the surface layer of the composition.
EFFECT: obtaining a composition which with low friction coefficient and low linear wear rate during prolonged use.
5 cl, 4 dwg, 1 tbl, 9 ex
FIELD: process engineering.
SUBSTANCE: invention relates to composite laminar rubberised-fabric materials. Proposed three-layer composite rubberised-fabric material consisting of outer cover layer, medium reinforcing layer and rubber layer. Two outer cover layers are made from butyl rubber-based rubber composition with the following components ratio (parts by weight); vulcanisation accelerator - mix of zinc white and thiuram D 3.8-4.2, vulcanisation agent - commercial sulfur 2.2-2.5, vulcanization rate regulator 2-mercap-tobenztiazol 0.8-1.1, filler - mix comprising white colour carbon and commercial carbon 33-34.1, plastifier - mix comprising stearic acid, chlorinated paraffin, netoxol, fluid "ПМС"-400 and zinc stearate 18.8-22.9, fire retardants - mix comprising antimony trioxide, chlorinated paraffin and melamine cyanurate 55-59, pigment - titanium white 9-10 and anti-adhesive - paraffin 1.9-2.1. Reinforcing layer is made from fabric of high-strength polyester fiber or aramide fiber or mix thereof. Content of high-strength polyester fiber if aforesaid mix with polyaramide fiber varies from 20 to 80 % by weight. Threads represent two-component combined threads. First component if rod from aramide and/or polyester complex thread or strand, while second component represent rod braiding with the number of coils of 600 to 900 c/m made from modified fireproof viscous thread or strand.
EFFECT: composite laminar rubberised-fabric material with increased mechanical properties, water resistance and wind impermeability.
7 cl, 4 ex
SUBSTANCE: invention relates to a method of producing antifriction moulding materials, meant for making antifriction components with complex shapes, for example bearing bushings. A method is described for producing antifriction organic fibre moulding material, involving preparation of a solution of epoxy resin by mixing epoxidated amine (A) with mineral H-Cu-montmorillonite (B) in ratio A:B ranging from 90:10 to 40:60, and an organic solvent, addition of hardening agent - adduct 3,3'-dichloro-4,4'-diaminodiphenylmethane with 3,4-epoxycyclohexamethyl-3',4'-epoxycyclohexanecarboxylate, and stirring. Further, organic fibre filler - chopped fibre and lubricant, is added. The mass is stirred and dried.
EFFECT: obtaining moulding material with high strength and heat resistance, which allows for making components through compression moulding and transfer moulding using the material.
1 cl, 2 tbl, 1 ex
SUBSTANCE: invention relates to metallic-elastomeric compound for manufacturing of products. Compound includes elastomer, allowing molecular weight in the range approximately from 100000 g/mol. up to 300000 g/mol., metal-fibrous material, formed from variety of metallic fibers, each of which allows correlation of length to width, exceeding approximately 1 and binding agent. Metal-fibrous material is mixed with elasticity tester in amount in the range from 50 particles up to 150 parts on 100 particles of elastomer.
EFFECT: products of particular compound are described by additional strength, ability to heat passage, electrical conductance and flexibility.
8 cl, 8 tbl, 13 dwg
SUBSTANCE: present invention pertains to versions of polyamide resin in form of granules, to composition of polyamide resin, moulded objects, versions of articulated moulded objects, binding band, and unit thread. In the first version, polyamide resin contains components of dicarboxylic acid o links, containing adipinic acid links, and components of diamine links, containing pentamethylenediamine links and hexamethylenediamine links. Mass ratio the number of pentamethylenediamine links to the number of hexamethylenediamine links lies between 95:5 and 5:95. Pentamethylenediamine links are formed from pentamethylenediamine, obtained from lysine using lysine decarboxylase, capable of producing lysine decarboxylase cells, or a product of converting such cells. In the second version, polyamide resin contains components of diamine links, with mass ratio of the number of pentamethylenediamine links to the number of hexamethylenediamine links lying between 95:5 and 60:40. The polyamide resin composition essentially consists of the above mentioned polyamide resin and inorganic filling material. Content of inorganic filling material ranges from 0.01 to 150 mass units, per 100 mass units of polyamide resin. From polyamide resin or composition of polyamide resin, a moulded object is obtained using vibration welding, or an articulated object, or a binding band, or a unit thread. The articulated moulded object can also be made from polyamide resin, consisting of adipinic acid links and pentamethylenediamine links.
EFFECT: obtaining a polyamide resin with high thermal stability, a moulded object, with high vibration welding strength, an articulated moulded object and a binding bans, with good low-temperature strength, a unit thread, with good transparency.
20 cl, 6 tbl, 6 ex, 8 dwg
SUBSTANCE: invention relates to structural polymer compositions based on ultra-high molecular polyethylene and fibrous fillers and may be used to manufacture plain bearings, seals, gear wheels and other structural machinery. Composition contains ultra-high molecular polyethylene and 5 to 25 wt % of fibrous filler. A blend of fibers 2-3 mm long is used as fibrous filler. It consists of 70 wt % of polyoxadiazole fiber and 30 wt % of cotton yarn.
EFFECT: improved compression strength, impact strength and antifriction properties.
FIELD: polymer materials.
SUBSTANCE: invention relates to polymer compositions based of fluoroplastic and fibrous fillers and can be used in manufacturing of slider bearings, sealing materials, tooth gears, and other structural parts of machines and mechanisms. Invention is directed to create polymer composition with improved physicochemical characteristics and provide polymer composition containing 83-95% of fluoroplastic and, as fibrous filler, 5-17% of ground organic paraaramid fiber (Rusar-S). Composition is distinguished by having compression strength higher by 22.5-39%, impact elasticity higher by 1.24-1.5 times, and wear lower by 1.2-1.6 times.
EFFECT: improved physicochemical characteristics of composition.
1 tbl, 6 ex
SUBSTANCE: rubber mixture has the following composition in pts. wt: fluorinated rubber SKF-26 65-68, low-molecular weight fluorinated rubber SKF-26 ONM 32-35, magnesium oxide 9.5-10.0, barium sulphate 13.0-13.5, calcium fluoride 10, calcium hydroxide 0.12, resorcinol 0.55, triethylbenzylammonium chloride 0.3, technical carbon N660 0.4, carnauba wax 1.0, ethyl alcohol 0.8.
EFFECT: improved dispersability of components of the mixture, low viscosity, reduced hardness of vulcanised rubber, while preserving resistance to aggressive liquids and accumulation of residual compressive deformation.
3 tbl, 2 ex
SUBSTANCE: invention relates to production of industrial rubber articles which are used in conditions with heavy mechanical loads, friction, aggressive media and severe climatic conditions and can be used to make sealing devices for flexible and fixed joints of the type of rings, cuffs and linings, as well as for making actuating devices for membrane converters of pressure changes into linear displacements and components of braking systems of railway vehicles. The polymer composition contains the following components in pts. wt: paraffin butadiene nitrile rubber 90-100, butadiene methylstyrene rubber 0-10, technical sulphur 0.5-1.5, tetramethylthiuram disulphide 1-2, N,N'-dithiodimorpholine 1.5-2.5, N-cyclohexyl-2-benzthiazolyl-sulphenamide 1.0-2.5; zinc oxide 4-8, phenyl-β-naphthylamine 0.5-2.5, technical carbon 100-150, dibutylphthalate 20-40, dibutyl sebacate 20-40 and stearic acid 0.5-2.5.
EFFECT: invention enables to obtain articles which can work in aggressive media at temperature as low as minus 60°C, are stable under periodic dynamic loads and have high operational reliability and a guaranteed long useful life.
6 cl, 2 tbl, 3 ex