Abrasive-resistant composition material

FIELD: polymeric materials.

SUBSTANCE: abrasive-resistant composition material is made of composition comprising the following ratio of components, wt.-%: functional additives, 40-45; thermoplastic modifying agent, 28.14-43.5; hardening agent, 1-2; epoxy resin E-41, E-41r, the balance. Mixture of thermoplastic chlorine-containing modifying agent - perchlorovinyl resin and thermoplastic polymer taken in the ratio = (1:0.5)-(1:0.005) is used as a thermoplastic modifying agent. Thermoplastic polymer is taken among the following group: polystyrene, acryl-butadiene-styrene plastic, polyamide, polyethylene, polypropylene, copolymer of ethylene and vinyl acetate. Invention provides enhancing the adhesion strength and stability to abrasive wearing, among them, in effect of sign-variable and impact loadings and vibrations. Invention can be used in machine engineering for making functional coverings preventing wear of articles, constructions or aggregates as result of effect of abrasive and corrosive media, impact loadings and vibrations.

EFFECT: improved and valuable properties of material.

2 tbl, 13 ex

 

The invention relates to the field of polymer materials, in particular composite materials on the basis of slivaushiesia resins intended for coating parts of machines, mechanisms and structures to prevent abrasive wear, corrosive environment and ensure the set of consumer characteristics of engineering products.

Modern machinery is widely used functional coatings for various parts, which reduce the coefficient of friction and wear during operation without lubrication [1, 2], increase the resistance to the abrasive action of the operating environment [3], protect from corrosive atmospheric conditions [4]. The most widely coatings from powder dispersed media by spraying or dipping in a fluidized bed [3], coatings from solutions and melts of composite materials [4]. As a polymer matrix in composite materials for coating the most widely polyamides(6, 66, 11, 12) [1, 2, 5], polyolefins, fluoropolymers, polyvinylchloride resin [3], epoxy, polyester, epoxy-ether, phenolaldehyde oligomers [4].

The typical structure of a composite material for functional coating includes: a polymer base and function of the national filler (dye, antioxidant, curing agent, an oxidation inhibitor, photoagent and others). The greatest distribution in mechanical engineering received 2 coating: a, according to which the coating is formed by melting the layer of composite material on the surface of the workpiece, and the mortar in which the coating is formed after removal of the technological environment (solvent and diluent) from the layer deposited onto the working surface in the form of a suspension using a spray, brush, roller, watering or dipping. Each technology has its advantages and disadvantages, and the choice of a specific technology for coating on the workpiece due to the item depending on your requirements of normative documents for output.

The most widely mortar technology of application of composite polymer coatings developed due to technological base, the simplicity of the technology of surface preparation and coating, the possibility of obtaining high-quality coatings in the formation without energy impacts, ensuring high-quality coatings intricate parts with odnotrahniki.

A known structure of a composite material based oligomer epoxy resin containing thermoplastic modifier compound and a functional additive, designed for applying coating to products made of metals and nonmetals to reduce the adverse effects of abrasive media, atmospheric and operational factors. This composition, called enamel, produced according to regulatory documents (specifications and process regulations) [6]. The produced composite material has high consumer characteristics and meets the regulatory requirements of the international quality system ISO9001. Among the significant disadvantages of the known composite material is a low resistance to abrasive environments and alternating loads. The flow of abrasive particles in a gaseous or liquid environment causes rapid destruction of the coating due to its lack of elasticity, and alternating, shock loads and vibrations lead to delamination of the coating from the machined part.

Closest to the claimed is abrasion resistant composite material based on epoxy oligomer (e-41) in the amount of 10-15 parts by weight, containing 6,5-6,9 parts by weight of a thermoplastic chlorinated polymer is a polyvinyl chloride resin as a modifier of 0.4 to 1.0 parts by weight of utverditeli and 15-19,8 parts by weight of the functional additives. [7]

The objective of the invention is to provide abrasion resistant components the investment material based on epoxy oligomer with increased resistance to abrasive wear and adhesive strength, including when exposed to alternating and shock loads and vibrations.

The problem is solved in that in abrasion resistant composite material made of a composition comprising epoxy resin, perchlorovinyl resin as a thermoplastic chlorinated modifier, hardener and functional additives, as the epoxy resin composition contains epoxy oligomer e-41, e-R, as thermoplastic modifier further comprises a thermoplastic polymer selected from the group of polystyrene, acrylonitrilebutadienestyrene plastic, polyamide, polyethylene, polypropylene, a copolymer of ethylene and vinyl acetate, the ratio of thermoplastic chlorinated modifier to thermoplastic polymer is 1:0.5 to 1:0.005 to, the following ratio of components, wt.%:

functional additives40-45
thermoplastic chlorinated modifier:
thermoplastic polymer is taken
the ratio of 1:0.5 to 1:0,00528,14-43,5
the hardener1-2
epoxy oligomer e-41, e-Rrest

The compositions abrasion resistant composite materials to the specific performance of the prototype and the invention is presented in the table. 1. To obtain abrasion resistant composite materials used epoxy resin grade e-R (TL6-10-607-78). As the chlorine-containing thermoplastic polymer used resin

Table 1
The compositions abrasion resistant composite materials
ComponentContent, wt.%
the placeholderThe inventive compositionsXIXII
IIIIIIIVVVIVIIVIIIIXX
1. Epoxy oligomer
resin e-4128,729,8627,010,527,027,027,027,027,027,0-32,456,7
- resin e-R-- -------27,0--
2. Thermoplastic chlorinated modifier - resin PHS-HP28,728,028,529,028,528,528,528,528,528,528,527,027,3
3. Funktsionalnyi supplements:
- pigment9,659,659,659,659,659,659,659,659,659,659,659,659,65
- filler17,4515,8518,3520,8518,3518,3518,3518,3518,3518,3518,3513,8525,85
- salt metal14,514,514,514,5 14,514,514,514,514,514,514.514,514,5
4. Thermoplastic polymer:
- CMEA-0,140,514,5------0,250,0515
- HDPE----0,5-----0,25--
- PP-----0,5-------
- PA6------0,5------
- PS1 -------0,5-----
- SS--------0,5----
- ABS--------0,5---
5. Hardener - hexamethylenediamine were121,511,51,51,51,51,51,51,52,51,0
6. The ratio of thermoplastic chlorinated modifier: thermoplastic polymer-1:0,0051:0,01751:0,51:0,01751:0,01751:0,01751:0,01751:0,01751:0,01751:0,01751:0,0011:0,55

PVC brand PHS-LS (OST6-01-37-88). As a functional add the in composition was injected pigments: titanium dioxide brand P-02 (OCT-84), chromium oxide (GOST 2912-72), technical grade carbon K-354, P-803 (GOST 7885-86), pigment blue phtalocyanines imported, pigment red iron oxide type K (TU 6-10-602-86), aluminum powder grade PAP-2 (GOST 5494-93), filler: micro-talc for paints and varnishes (GOST 19284-79), salt of the metal: zinc phosphate (TG 100-01087), strontium chronologicly (TU 38-4-23 9-82).

The combination of pigments is determined by the requirements of colours coating of a composite material. The filler is chosen based on the requirements for hardness. Salt of the metal provides the processes structuring binder. These components, in any combination with the claimed ratios do not have a fundamental influence on the characteristics of abrasion resistant composite material. As a hardener was used hexamethylenediamine were (compound No. 1) (GOST-10-1263-77). It is allowed to use any amine hardener (polyethylenepolyamine and others), which provides a sufficient rate of formation (curing) composite abrasion resistant material.

As thermoplastic polymer used powder products obtained by cryogenic grinding of industrially produced thermoplastics in the form of granules or crushed fragments - density polyethylene (HDPE), polypropylene (PP), polystyrene (PS), acrylamides rolnego plastic (ABS), polyamides (PA6, A11, A12), of a copolymer of ethylene and vinyl acetate (CMEA). Powders of polymers with size from 1 to 150 μm was obtained by cryogenic grinding of granules at a temperature of liquid nitrogen (or other suitable coolant).

For modification of the material used fraction with size not more than 40 μm, which corresponds to the milling degree of the semi-finished product.

Abrasion resistant composite material was obtained by the sequential components are mixed with a solution of a polymeric binder (epoxy and chlorinated polyvinyl chloride resin). Blending is done with the use of special technological equipment, dissolvers, ball and bead mills.

Coating of abrasion resistant composite material formed by the mortar technology, introducing the hardener at the last stage of receipt. After removal of the technological environment of the solvent and curing of the binder coating of abrasion resistant composite material was subjected to testing. Characteristics of the coatings of the developed material and the prototype was evaluated according to standard techniques. The hardness of the coatings was determined according to GOST 5233-84 "Materials paint. Method for determination of hardness by pendulum device". Resistance of coatings of the materials developed and the prototype to the abrasion resistance (abrasion) was determined by p the GOST 20811-75 "Materials paint. The method of determining the strength of the coating to abrasion". The essence of the method is exposed to the test sample stream of dry abrasive (sand). Resistance to wear is estimated by the amount of abrasive in kg, caused the destruction of the specimen.

The adhesion of the coating to the substrate was evaluated by the method of lattice cuts in points. The strength of the film at impact was determined by device Y-1. As the characteristic strength is the size in cm, corresponding to a fall height of the indenter on the floor without its destruction. The elasticity of the film when bending was evaluated on cylindrical samples of different diameters. As the characteristic elasticity served as the cylinder diameter, the bending which does not cause destruction of the sample. The resistance to static action of operational environments was determined by keeping the samples at a temperature of 20±2°With water, 3% solution of sodium chloride, gasoline and mineral oil And 20. The resistance of the composite material to the alternating stress was determined by the number of cycles of deformation of the sample coated (fold-regib flat).

Samples for testing according to the prior art and the claimed compositions were made by coating on plates of black iron GOST 13345-85 size 70×150 and thickness of 0.25-0.32 mm or of steel grades 08KP and 08PS graveyard 16523-97 size 70× 150 and a thickness of 0.8-1.0 mm General requirements on the sizes of samples for testing and the technology of their production meets the requirements of GOST 8832-76 "Materials paint. Methods of obtaining coatings for testing and GOST 9880.2-86 "Materials paint. Sampling for testing".

Comparative characteristics of the claimed compositions and prototype are presented in table. 2. As follows from the presented data, the claimed compositions abrasion resistant composite materials in the stated proportions of components (compounds I-X) provide a positive effect, is to increase the adhesion strength, resistance to abrasive wear and alternating loads.

A reduction in the content of the components and their optimal ratio or increasing the content ratio (compounds XI-XII) or dramatically reduces the effect or not leads to additional characteristics of the material. The claimed compositions for resistance to abrasive wear surpass the prototype in 9-10 times, resistance to alternating loads in 5-9 times, resistance to shock loads 10-20%, which emphasizes the importance of the stated characteristics.

The invention consists in the following. With the introduction of the epoxy matrix, forming when merging rigid structure, elastic thermoplastic to mponent reduced level of residual stresses, due to the processes of stitching, thereby increasing the adhesion strength, wear resistance and impact strength of the material. However, the presence of only chlorine

15
Table 2
Comparative characteristics of the claimed compositions and prototype.
DescriptionThe indicator for composition
the placeholderthe inventive compositionsXIXII
IIIIIIIVVVIVIIVIIIIXX
1. The adhesion points1111111111112
2. The hardness of the material by pendulum device:
- type M-1 0,50,50,50,50,50,50,50,50,50,50,50,50,5
- type TMA-(A)0,30,30,30,30,30,30,30,30,30,30,30,30,3
3. The strength of the material at the impact on unit U-1, cm50556060606060606060605550
4. The elasticity of the material in bending, mm1111111111111
5. Resistance to static action at a temperature of 20±2°, h
- water72 727272727272727272727272
- 3 wt.% NaCl solution24242424242424242424242424
petrol24242424242424242424242424
- mineral oil24242424242424242424242424
6. Resistance to abrasion resistance, kg/mm0,251,52,52,01,31,31,71,71,81,82,30,52,0
7. Resistance to alternating loads, cycles2101518121215161618310

thermoplastic modifier (perchlorovinyl resin) may not provide optimal characteristics of the material, because the modifier due to the difference in specific gravities forms mainly the outer layer of the composite coating. With the introduction of the addition of dispersed particles of thermoplastic polymer is formed of a composite structure in which particles of modifier simultaneously perform the function of anti-wear additives, and a component that reduces the probability distribution of cracks by volume of the composite. Particles of thermoplastic modifier or swell in the technological environment (solvent and diluent), or partially dissolved. This contributes to the local modification of the coverage of the developed material by section and the formation of a strong adhesive bond at the interface "epoxy matrix polymer filler".

The formation of the coating is relatively small and amounts to no more than 3 hours at a temperature of 20±2°C. When this technological environment (solvent) is removed from the composition, providing only a partial dissolution (swell) particles of the polymer modifier. As a result, they have high thermodynamic compatibility with the Mat is itsey and retain its structural strength. Thus, the volume of the composite is formed by a spatial grid of particles of a polymeric modifier, providing a synergistic effect.

The composition abrasion resistant composite material intended for the manufacture of coatings on machine parts and mechanisms exploited when exposed to abrasive environments, adverse weather conditions, shock loads and vibration. A typical design of this type are the drive shafts of automobiles, agricultural machinery, railway and urban transport. Experimental-industrial production of abrasion resistant composite material for coating of drive shafts carried out at JSC "BelCard".

The sources of information.

1. RF patent 2228347, 2002.

2. RF patent 2219212, 2002.

3. Dovgalo VA, Yurkevich O.R. Composite materials and coatings based on dispersed polymer. - Minsk: Science and technology, 1992. - 256 S.

4. Yakovlev A.D. Powder paint. - Leningrad: Khimiya, 1984. - s.

5. Designing for Rilsan coatings ELF ATOCHEM, Paris, 1999. - p.18.

6. Enamel EP-1236. Technical conditions TU 6-10-2095-87. Developed NPAO "Spectrum" , Moscow (GIPI LKP, , Moscow).

7. RF patent 2233299, 2004.

Abrasion resistant composite material made of a composition comprising epoxy resin, perchlorovinyl resin as a thermoplastic harcode the containing modifier, the hardener and additives, characterized in that the epoxy resin composition contains epoxy oligomer e-41, e-R, as thermoplastic modifier further comprises a thermoplastic polymer selected from the group of polystyrene, acrylonitrilebutadienestyrene plastic, polyamide, polyethylene, polypropylene, a copolymer of ethylene and vinyl acetate, the ratio of thermoplastic chlorinated modifier to thermoplastic polymer is 1:0.5 to 1:0.005 to, the following ratio, wt.%:

Functional additives40-45
Thermoplastic chlorinated modifier:
thermoplastic polymer is taken
the ratio of 1:0.5 to 1:0,00528,14-43,5
The hardener1-2
Epoxy oligomer e-41, e-RRest



 

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