Composition for impregnation of polishing disk
FIELD: organic chemistry, impregnating compositions.
SUBSTANCE: invention relates to composition used for impregnation of a polishing disk. The composition for impregnation of polishing disk comprises a binding agent aqueous solution representing a mixture of an aqueous emulsion of co-polymer prepared by emulsion polymerization of butyl acrylate, ethyl acrylate, methyl methacrylate and acrylic acid amide with the content of basic substance 50 ± 5%, liquid water glass and oxyethylated lanolin in the following ratio of components, mas. p. p.: copolymer of butyl acrylate, ethyl acrylate, methyl methacrylate and acrylic acid amide as measure for dry residue, 15-50; liquid water glass, 3-12; oxyethylated lanolin, 1-6, and water, 45-105. Invention provides enhancing stability and to reduce cost in making the polishing disk.
EFFECT: improved and valuable properties of composition.
2 tbl, 4 ex
The invention relates to the production of sialetonga and sisaltotaulu polishing wheel, the principle of which is based on the effect of friction.
Known technical solution /s-164. Marchenkov V.I. Jewelry. The Supreme. SHK. 1984/used in the jewelry enterprises to mechanical abrasive polishing products, for example, using a fabric circles pasta. Pastes contain fine abrasive powders (chromium oxide, iron oxide, silicon oxide), fatty ligament (stearin, paraffin, technical fat, aserin, wax, oxidized petrolatum) and special additives (bicarbonate soda and oleic acid, turpentine and kerosene). Pastes are applied on the polishing wheels during rotation of the circle. During polishing of precious metals for the primary and the main processing surface serve pasta, for final finishing - crocosmia paste (silicon oxide, paraffin, mineral oil, aserin, iron oxide). Compounds selected depending on the hardness of the polished alloys.
For polishing plastics part of the circle is covered with a paste containing abrasive element chromium oxide /227 S. encyclopedia of polymers, volume 2, M, Owls. Encyclopedia, 1974/.
During polishing, for example, in mechanical engineering and instrumentation applied polishing and finishing materials mainly in the de pastes and suspensions. Paste is a composition of polishing powders, fats, binders, surfactants and other substances. Known polishing wheels on the basis of foamed PVC resins having a high porosity, which prevents clogging. These circles can also be used for stainless steel /p.56. Kudasov GF Abrasive materials and tools. L., engineering, 1967. 158 C./.
In the furniture and joinery manufacture of polishing is rotating soft textile drums, which are drawn from the fabric circles, impregnated with a solution of an organic film-forming agent (for example, delacey varnish).
On the performance of the polishing and the roughness of the processed surface has a significant impact as a polishing material basis, the form of its installation in the circle, providing dimensional stability (elasticity) of the terms and composition of the impregnated composition. The selection of optimum design and characteristics of the polishing wheel depend on many factors, including material polished product, the source and the desired surface roughness (purity polishing), price range, etc.
Polishing wheels from sialetonga material used for the preliminary and final processing of Cutlery and their domain is Inesta stainless steel devices for dental practices, products Amateur crafts, jewelry and watches, etc.
Sisaltyvia polishing wheels without proper impregnation and curing impregnating compositions have a small resistance, wear out quickly, which is economically disadvantageous.
JSC "Kyshtym plant abrasives" /Directory. Kyshtym plant abrasive materials. M, VIITAMIN, 1991, 28 S./ polishing wheels pervades pentaftalevyh lacquer brand PF-587, followed by drying. Despite the fact that the quality of the polished product meets the requirements, the resistance of such circles is very low (see table 1). In addition, the use of varnish PF-587 pollute the environment and is a fire hazard.
A sizing composition for impregnation of a fabric base coated abrasives (A.S. 532516, B 24 D 3/34) contains polyvinyl alcohol, mineral filler, sodium silicate and water.
Technical solution /A.S. No. 682550, C 08 L 31/04, 1979/ includes: copolymer of vinyl acetate, butyl acrylate and acrylic acid, a low molecular weight epoxy or resorcinol resin and an organic solvent.
Known composition /A.S. No. 37304 from 30.05.85, Bulgaria/, taken as a prototype, is a 3-15% solution of polyvinyl alcohol in water. Sisaltyvia circles soaked in this solution, dried at room tempera what ur in for 24 hours and then at a temperature of more than 70° C. the Composition is non-toxic, non-flammable, does not pollute the environment. However, the resistance circles, saturated aqueous solution of polyvinyl alcohol and dried at polishing tablespoons is 29 thousand pieces (but resistance range, impregnated with this composition, very low).
The technical result is an increase durability and reduce the cost of production polishing wheel.
The technical result is achieved in that in the composition for impregnation polishing wheel comprising an aqueous solution of the binder according to the invention, as a binder, a mixture of an aqueous emulsion of a copolymer obtained by the emulsion polymerization of butyl acrylate, ethyl acrylate, methyl methacrylate and acrylic amide acid content of the basic substance 50±5%, the glass liquid sodium and ethoxylated lanolin in the following ratio of ingredients, parts by weight: copolymer of butyl acrylate, ethyl acrylate, methyl methacrylate and acrylic amide acid, calculated on the dry matter - 15-50; glass liquid sodium - 3-12; ethoxylated lanolin - 1-6 and water - 45-105.
In the implementation of the proposed technical solutions can be used, for example, the following materials:
Glass liquid sodium (GOST 13078-81);
Drinking water (GOST 4386-81);
The ethoxylated lanolin (TU 5-14-600-76);
Copolyme the acrylate /methacrylate (GOST 20370-74), ethyl acrylate and butyl acrylate, acrylic acid amide (acrylamide) - their characteristics are listed in the Directory "(Meth) acrylic monomers and oligoadenylate", Cherkassy, 1988;
Situatively and italcarguy material (Calico art. S; GOST 24327-80; 24221-94 etc). Sisal fabric (natural fiber) has the characteristic (average): density of 1.3 g/cm3(at 25°); fiber diameter of 19 microns; tensile strength, MN/m2- 340; maximum operating temperature is 100° /s. Encyclopedia of polymers, volume 2. M, Owls. Encyclopedia, 1974)/.
The latex solution of copolymer in water (usually obtained with a content of the copolymer is 50±5 wt.%); the dispersion of THE acrylic 2241-191-05757593-2000 (form. "Plexiglass").
Synthesis of copolymer get when mixing and subsequent heating at a temperature of 60-80°C for 6-8 h in the presence of peroxide ammonium sulfate and surfactants in the aquatic environment the following monomers (parts by weight):
the acrylate - 150; acrylate - 150; methylmethacrylate - 218; amide of acrylic acid - 18.
Obtaining solution for impregnation. In a mixer equipped with a stirrer, download latex obtained by the emulsion polymerization of methyl methacrylate, ethyl acrylate, butyl acrylate and acrylic amide acid containing 50±5% of the copolymer and 50±5% water. The latex may contain a water-soluble peroxide (initiatives the ora polymerization), for example, ammonium persulfate, surfactants, flame retardants, for example salts of orthophosphoric acid, antiseptics, etc.
In latex add liquid glass in the following ratio, wt h: 100 latex 10-12 liquid glass.
Then include a stirrer and stirred for 15-20 min (solution used for impregnation in the following example 1). Later in the mixture add distilled or demineralized water to 100 parts by weight of latex to 250 parts by weight of water. Stirred for 15-20 minutes. The mixture used in examples 2 and 3.
Prepared solutions as to water dilution or after dilution preferably pass through kraskoterke obtaining particles ≤50 microns.
The invention is illustrated by four examples, the manufacture of a composition for impregnation polishing wheel.
For impregnation sisaltyviin and sisalkordel polishing laps are used in all examples, the solution composition (by mass):
|The copolymer (in terms of dry residue)||24|
|The ethoxylated lanolin||2|
The composition may optionally contain a pigment. Sisaltyvia Crewe and 150× 20×19/6 CX impregnated with this mixture and dried at a temperature of 130-150°during polishing knobs tablespoons, have a resistance in the range of 13-15% higher than German circles firm Lippert.
|The copolymer (in terms of dry residue)||15|
|The ethoxylated lanolin||1|
|The copolymer (in terms of dry residue)||48|
|The ethoxylated lanolin||6|
|The copolymer (in terms of dry residue)||24|
|The ethoxylated lanolin||1|
The mixture may contain a pigment.
Technology impregnation circles. Impregnation is performed on a patented special installation (utility model No. 33521); they are then dried for 30 minutes at a temperature of 130°C. Spoon polished circles on the polishing machine PP-5.
Shows that the L.1, circles saturated with the composition, followed by drying at a temperature of 120-150°have a high resistance, superior resistance circles firm Lippert-UNIPOL (Germany). The circles are non-toxic, Samosata and their use is economically viable.
Resistance circles 150×20×19/SH during polishing tablespoon (quantity in thousand pieces). Time polishing 1 min, pressure - (10-15) ATM (1,01-1,52)10-6PA
|Shaft||Lanolin||Without lanolin||The firm of Lippert-UNIPOL||hrystyna PF-587||Saint Petersburg||Binder is polyvinyl alcohol|
Table 2 shows the results of industrial research resistance sisaltyviin circles 150×20×19/SH (impregnated with mixtures of examples 2-4) when polishing the handle tablespoons; resistance circles above the resistance of the German circles firm Lippert-UNIPOL.
|no examples||Manufacturer||Qty polished products, PCs||Quality polishing**||The price of the 1st circle, RR|
|The lower shaft*||The upper shaft*|
|1.||JSC "MIZ-Vorsma" applicant||64100||69000||Meets standard||69,86|
|The firm of Lippert-UNIPOL||56600||60200||Standard||109,76|
|*On the shaft 50 pieces of circles 150×20×19/SH.|
Quality polishing meets the requirements or standard (standard** quality is obtained when the polishing circles firm Lippert-UNIPOL, Germany).
Conducted by the applicant's analysis of the prior art, including searching by the patent and scientific and technical information sources, and identify sources that contain the information the Oia about the equivalents of the claimed invention, has allowed to establish that the applicant had not discovered similar, characterized by signs, identical to all the essential features of the claimed technical solution. The definition from the list of identified unique prototype as the most similar essential features of the analog revealed the essential in relation to perceived technical result of the distinctive features in the claimed compositions set forth in the claims. Therefore, the claimed invention meets the condition of "novelty."
To verify compliance of the claimed invention the term "inventive step", the applicant conducted an additional search of the known solutions /Directory-directory. Abrasive materials and tools. M, ozonation plants as well, 360 S.; BAS, ed. 3, vol. 1. M, Owls. encyclopedia, 1969/that match the distinctive features of the prototype of the characteristics of the claimed composition. The search results showed that the claimed invention not apparent to the expert in the obvious way from the prior art because the prior art defined by the applicant, not the influence provided the essential features of the claimed invention transformations to achieve a technical result. Not known compositions for impregnation polishing wheel, ensuring to achieve the post is run goal, that testifies to the satisfaction of the criterion of "inventive step".
The claimed technical solution can be used in the production of art objects made of metal, jewelry and medical industry, it is disclosed in the application materials in sufficient detail for its implementation. Thus, the proposed solution meets the criteria of the invention "industrial applicability".
Composition for impregnation polishing wheel comprising an aqueous solution of a binder, wherein the binder a mixture of a water emulsion of a copolymer obtained by the emulsion polymerization of butyl acrylate, ethyl acrylate, methyl methacrylate, and acrylic amide acid content of the basic substance (50±5)%, glass liquid sodium and ethoxylated lanolin in the following ratio of ingredients, parts by weight:
|Copolymer of butyl acrylate, ethyl acrylate,|
|of methyl methacrylate and acrylic amide acid|
|in terms of dry residue||15-50|
|Glass liquid sodium||3-12|
|The ethoxylated lanolin||1-6|
FIELD: polishing materials.
SUBSTANCE: invention relates to manufacturing cotton polishing disks based on friction effect. The composition for making polishing disks comprises a binding agent aqueous solution wherein an aqueous emulsion of copolymer 15-50% of its total mass is used and prepared by emulasion polymerization of butyl acrylate, ethyl acrylate, methyl methacrylate and acrylic acid amide in the ratio, mas. p. p.: butyl acrylate, 140-160; ethyl acrylate, 140-160; methyl methacrylate, 205-231; acrylic acid amide, 17-19. Invention provides enhancing durability of polishing disks and to reduce cost in their making. Invention can be used for polishing table dishware and their parts made of stainless, devices for dental practice, jewelry articles, watches and so on.
EFFECT: improved and valuable properties of composition.
2 tbl, 9 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: chemistry of organophosphorus compounds.
SUBSTANCE: invention relates to compounds with the bond C-P, namely to phosphorus-boron-containing methacrylate that can be used as inhibitor of combustion of polyvinyl alcohol-base film materials. Invention describes phosphorus-boron-containing methacrylate of the following formula: wherein n = 4-8. Polyvinyl alcohol films modified with indicated phosphorus-boron-containing methacrylate shows the enhanced refractoriness, rupture strength up to 206 kgf/cm2, water absorption up to 240% and relative elongation up to 12%.
EFFECT: valuable properties of substance.
1 tbl, 2 ex
FIELD: production of high-molecular compounds.
SUBSTANCE: the invention is pertaining to the field of production of high-molecular compounds, in particular, to polymeric composition used for production of cryogels on the basis of polyvinyl alcohol. The offered polymeric composition having the interrelated macropores of cryogel of polyvinyl alcohol contains 3-25 mass % of polyvinyl alcohol, 0.001-1 mass % of ionogenic-cationic anionic either amphoteric or nonionogenic surface active agent and water (up to 100 mass %). In the process of the cryogenic treatment of the indicated polymeric compositions produce a macroporous cryogel with the size of interrelated macropores from 2 up to 10 microns, The macroporous cryogel may be efficiently used in the capacity of a biomedical application material.
EFFECT: the invention allows to obtain a macroporous cryogel, which may be efficiently used as a biomedical application material.
9 ex, 1 tbl
FIELD: chemistry of polymers, chemical technology.
SUBSTANCE: invention relates to polymeric composition for frictional designation. Frictional polymeric composition comprises the following components, wt.-%: a binding agent chosen from the group of high-molecular unsaturated hydrocarbon rubbers: a mixture of SKD and SKD-3 with addition of industrial oil I-20, 10.0-13.0; fibrous asbestos-free filling agent wollastonite, 50.0-55.0; inorganic modifying barite, 19.0-25.0; frictional modifying agent graphite, 2.0-4.0. As a vulcanizing group the composition comprises the following components, wt.-%: sulfur, 3.0-4.0; Captax, 0.2-0.5; thiuram, 1.2-1.7; zinc oxide, 0.3-0.7. The composition comprises additionally technical carbon, 1.5-1.9 wt.-% and a binder modifying agent chosen from the group of diacids: ortho-phthalic, isophthalic and terephthalic acids, 0.1-5.0 wt.-%. Proposed frictional polymeric composition provides stability of friction coefficient of articles made of its base and to decrease evolution of hazard substances, in particular, phenol to environment in molding articles. Invention can be used in manufacturing brake shoes and brake linings in transport facilities and other mechanical objects.
EFFECT: valuable technical properties of composition.
2 tbl, 2 ex