CN116082959B - Self-curing coating insulating material for electrified railway carrier cable - Google Patents
Self-curing coating insulating material for electrified railway carrier cable Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
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- C09D183/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
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Abstract
The invention discloses a self-curing coating insulating material for an electrified railway carrier cable. The composite material is prepared from the following components in parts by weight: 40-60 parts of gamma-trifluoropropyl methyl polysiloxane, 30-50 parts of alpha, omega-divinyl polydimethylsiloxane, 5-15 parts of curing agent, 3-10 parts of flame retardant, 5-8 parts of wear-resistant agent, 10-20 parts of filler and 0.5-3 parts of catalyst. The self-curing coating insulating material for the carrier cable of the electrified railway can be self-cured under normal temperature conditions, and can be operated in a coating mode, so that the carrier cable is prevented from being maintained in a traditional periodical oiling mode.
Description
Technical Field
The invention belongs to the technical field of electrified railway carrier ropes, and particularly relates to an electrified railway carrier rope self-curing coating insulating material.
Background
The carrier cable is an important lead which plays a double role of power transmission and locomotive slideway line suspension in the electrified railway contact network line. Because of special operation conditions and environments of railways, the requirements on the bearing cable performance are very high, the bearing cable is required to have certain conductive current carrying capacity, normal and good power transmission can be ensured under the changes of different areas, four seasons, air temperatures and various climatic conditions, and the bearing cable is corrosion-resistant and long in service life.
At present, two wires are mainly used as carrier ropes in China, namely, the steel strand carrier ropes are good in electric conduction and corrosion resistance, but high in price and low in strength. The other is a steel-cored aluminum stranded wire carrier cable, which has high specific strength and low price, but uses galvanized steel wires as core wires, has poor corrosion resistance, has zinc-aluminum micro-battery galvanic corrosion with outer aluminum wires, needs to oil and resist corrosion on the wires each year, and has poor labor condition, high labor intensity and high maintenance cost in field high-altitude operation.
The bare overhead carrier cable is easy to cause accidents in densely populated areas, forests, rivers and the like, and causes personal and property loss and injury, so the insulation is of great significance. The existing insulating material is difficult to rapidly self-solidify at room temperature, and the solidification of the self-material can be realized only by additional auxiliary heating, so that the requirements of automatic construction and rapid and automatic coating in the open air for long distance can not be met. The insulating material has gaps even after self-curing, is difficult to be tightly attached to a protected exposed conductor, has poor waterproof sealing performance and anti-leakage performance, has poor pollution resistance and ultraviolet aging resistance, is not wear-resistant, and is difficult to ensure the service life of long-term safe operation.
Disclosure of Invention
The invention aims to provide a self-curing coating insulating material for an electrified railway carrier cable.
The self-curing coating insulating material for the electrified railway carrier cable is prepared from the following components in parts by weight: 40-60 parts of gamma-trifluoropropyl methyl polysiloxane, 30-50 parts of alpha, omega-divinyl polydimethylsiloxane, 5-15 parts of curing agent, 3-10 parts of flame retardant, 5-8 parts of wear-resistant agent, 10-20 parts of filler and 0.5-3 parts of catalyst.
The molecular weight of the gamma-trifluoro propyl methyl polysiloxane is 100000 ～ 150000, and the viscosity is 80-120 Pa and s.
The molecular weight of the alpha, omega-divinyl polydimethylsiloxane is 100000 ～ 150000, and the viscosity is 60-100 Pa & s.
The curing agent is methyl triethoxy silane and vinyl tributyl ketoxime silane according to the mass ratio of 3: 1.
The flame retardant is one or more of aluminum hydroxide, zinc borate, antimony oxide, ethylene tetraethyl biphosphate and hexaphenoxy cyclotriphosphazene.
The wear-resistant agent is glass beads and bis- [ gamma- (triethoxysilyl) propyl ] tetrasulfide, and the mass ratio is 1: 1.
The filler is one or more of aluminum nitride, magnesium oxide, boron nitride and silicon carbide.
The catalyst is one or more of dibutyl tin dilaurate, stannous octoate, titanate and triallyl isocyanurate.
The preparation method of the self-curing coating insulating material for the electrified railway carrier cable comprises the following steps:
(1) Taking 40-60 parts of gamma-trifluoropropyl methyl polysiloxane and 30-50 parts of alpha, omega-divinyl polydimethylsiloxane according to parts by weight, and fully mixing by a planetary mixer to obtain primary mixed glue;
(2) Adding 10-20 parts of filler into the primary mixed glue obtained in the step (1), sealing and fully mixing in a kneader, and grinding by a roller to obtain base glue;
(3) And cooling the base adhesive, adding 3-10 parts of flame retardant, 5-8 parts of wear-resistant agent, 0.5-3 parts of catalyst and 5-15 parts of curing agent under stirring, fully mixing and stirring, and discharging to obtain the flame retardant.
The invention has the beneficial effects that: the self-curing coating insulating material for the carrier cable of the electrified railway can be self-cured under normal temperature conditions, and can be operated in a coating mode, so that the carrier cable is prevented from being maintained in a traditional periodical oiling mode. The combination of the main materials of gamma-trifluoro propyl methyl polysiloxane and alpha, omega-divinyl polydimethylsiloxane in the insulating material component can improve the mechanical properties of the material; the combined use of the curing agent methyltriethoxysilane and vinyl tributylketoxime silane shortens the curing time of the material; the combination of the glass bead of the wear-resistant agent and the bis- [ gamma- (triethoxysilyl) propyl ] tetrasulfide improves the wear resistance of the material.
Detailed Description
The present invention will be described more fully hereinafter in order to facilitate an understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Example 1
The self-curing coating insulating material for the electrified railway carrier cable is prepared from the following components in parts by weight: 50 parts of gamma-trifluoropropyl methyl polysiloxane, 40 parts of alpha, omega-divinyl polydimethylsiloxane, 10 parts of curing agent, 6 parts of aluminum hydroxide, 6 parts of wear-resistant agent, 15 parts of aluminum nitride and 1.5 parts of dibutyl tin dilaurate; the molecular weight of the gamma-trifluoro propyl methyl polysiloxane is 120000, and the viscosity is 100Pa & lt, s; the molecular weight of the alpha, omega-divinyl polydimethylsiloxane is 130000, and the viscosity is 80Pa & lt s > the curing agent is methyl triethoxy silane and vinyl tributyl ketoxime silane according to the mass ratio of 3: 1; the wear-resistant agent is glass beads and bis- [ gamma- (triethoxysilyl) propyl ] tetrasulfide, and the mass ratio is 1: 1.
The preparation method of the self-curing coating insulating material for the electrified railway carrier cable comprises the following steps:
(1) Taking 50 parts of gamma-trifluoropropyl methyl polysiloxane and 40 parts of alpha, omega-divinyl polydimethylsiloxane according to parts by weight, and fully mixing by a planetary mixer to obtain primary mixed glue;
(2) Adding 15 parts of aluminum nitride into the primary mixed glue obtained in the step (1), sealing and fully mixing in a kneader, and grinding by a roller to obtain a base glue;
(3) And cooling the base adhesive, adding 6 parts of aluminum hydroxide, 6 parts of wear-resistant agent, 1.5 parts of dibutyltin dilaurate and 10 parts of curing agent under stirring, fully mixing and stirring, and discharging to obtain the adhesive.
Example 2
The self-curing coating insulating material for the electrified railway carrier cable is prepared from the following components in parts by weight: 40 parts of gamma-trifluoropropyl methyl polysiloxane, 30 parts of alpha, omega-divinyl polydimethylsiloxane, 5 parts of curing agent, 4 parts of zinc borate, 5 parts of wear-resistant agent, 10 parts of boron nitride and 0.5 part of stannous octoate; the molecular weight of the gamma-trifluoro propyl methyl polysiloxane is 100000, and the viscosity is 80Pa & lt s > the molecular weight of the alpha, omega-divinyl polydimethylsiloxane is 100000, and the viscosity is 60Pa & gts; the curing agent is methyl triethoxy silane and vinyl tributyl ketoxime silane according to the mass ratio of 3: 1; the wear-resistant agent is glass beads and bis- [ gamma- (triethoxysilyl) propyl ] tetrasulfide, and the mass ratio is 1: 1.
The preparation method of the self-curing coating insulating material for the electrified railway carrier cable comprises the following steps:
(1) According to the parts by weight, 40 parts of gamma-trifluoropropyl methyl polysiloxane and 30 parts of alpha, omega-divinyl polydimethylsiloxane are taken and fully mixed by a planetary mixer to obtain primary mixed glue;
(2) Adding 10 parts of boron nitride into the primary mixed glue obtained in the step (1), sealing and fully mixing in a kneader, and grinding by a roller to obtain a base glue;
(3) And (3) cooling the base adhesive, adding 4 parts of zinc borate, 5 parts of wear-resistant agent, 0.5 part of stannous octoate and 5 parts of curing agent under stirring, fully mixing and stirring, and discharging to obtain the finished product.
Example 3
The self-curing coating insulating material for the electrified railway carrier cable is prepared from the following components in parts by weight: 60 parts of gamma-trifluoropropyl methyl polysiloxane, 50 parts of alpha, omega-divinyl polydimethylsiloxane, 15 parts of curing agent, 10 parts of ethylene tetraethyl biphosphate, 8 parts of wear-resistant agent, 20 parts of silicon carbide and 3 parts of titanate; the molecular weight of the gamma-trifluoro propyl methyl polysiloxane is 150000, and the viscosity is 120Pa & lt, s; the molecular weight of the alpha, omega-divinyl polydimethylsiloxane is 150000, and the viscosity is 100Pa & lt, s; the curing agent is methyl triethoxy silane and vinyl tributyl ketoxime silane according to the mass ratio of 3: 1; the wear-resistant agent is glass beads and bis- [ gamma- (triethoxysilyl) propyl ] tetrasulfide, and the mass ratio is 1: 1.
The preparation method of the self-curing coating insulating material for the electrified railway carrier cable comprises the following steps:
(1) Taking 60 parts of gamma-trifluoropropyl methyl polysiloxane and 50 parts of alpha, omega-divinyl polydimethylsiloxane according to parts by weight, and fully mixing by a planetary mixer to obtain primary mixed glue;
(2) Adding 20 parts of silicon carbide into the primary mixed glue obtained in the step (1), sealing and fully mixing in a kneader, and grinding by a roller to obtain a base glue;
(3) And cooling the base adhesive, adding 10 parts of ethylene tetraethyl diphosphate, 8 parts of wear-resistant agent, 3 parts of titanate and 15 parts of curing agent under stirring, fully mixing and stirring, and discharging to obtain the modified polyethylene glycol terephthalate.
Comparative example 1
The self-curing coating insulating material for the electrified railway carrier cable is prepared from the following components in parts by weight: 90 parts of gamma-trifluoropropyl methyl polysiloxane, 10 parts of curing agent, 6 parts of aluminum hydroxide, 6 parts of wear-resistant agent, 15 parts of aluminum nitride and 1.5 parts of dibutyl tin dilaurate; the molecular weight of the gamma-trifluoro propyl methyl polysiloxane is 120000, and the viscosity is 100Pa & lt, s; the molecular weight of the alpha, omega-divinyl polydimethylsiloxane is 130000, and the viscosity is 80Pa & lt s > the curing agent is methyl triethoxy silane and vinyl tributyl ketoxime silane according to the mass ratio of 3: 1; the wear-resistant agent is glass beads and bis- [ gamma- (triethoxysilyl) propyl ] tetrasulfide, and the mass ratio is 1: 1.
The preparation method of the self-curing coating insulating material for the electrified railway carrier cable comprises the following steps:
(1) Taking 90 parts of gamma-trifluoropropyl methyl polysiloxane according to parts by weight, adding 15 parts of aluminum nitride, sealing and fully mixing in a kneader, and grinding by a roller to prepare base rubber;
(2) And cooling the base adhesive, adding 6 parts of aluminum hydroxide, 6 parts of wear-resistant agent, 1.5 parts of dibutyltin dilaurate and 10 parts of curing agent under stirring, fully mixing and stirring, and discharging to obtain the adhesive.
Comparative example 2
The self-curing coating insulating material for the electrified railway carrier cable is prepared from the following components in parts by weight: 90 parts of alpha, omega-divinyl polydimethylsiloxane, 10 parts of curing agent, 6 parts of aluminum hydroxide, 6 parts of wear-resistant agent, 15 parts of aluminum nitride and 1.5 parts of dibutyl tin dilaurate; the molecular weight of the gamma-trifluoro propyl methyl polysiloxane is 120000, and the viscosity is 100Pa & lt, s; the molecular weight of the alpha, omega-divinyl polydimethylsiloxane is 130000, and the viscosity is 80Pa & lt s > the curing agent is methyl triethoxy silane and vinyl tributyl ketoxime silane according to the mass ratio of 3: 1; the wear-resistant agent is glass beads and bis- [ gamma- (triethoxysilyl) propyl ] tetrasulfide, and the mass ratio is 1: 1.
The preparation method of the self-curing coating insulating material for the electrified railway carrier cable comprises the following steps:
(1) Taking 90 parts of alpha, omega-divinyl polydimethylsiloxane according to parts by weight, adding 15 parts of aluminum nitride, sealing and fully mixing in a kneader, and grinding by a roller to prepare base rubber;
(2) And cooling the base adhesive, adding 6 parts of aluminum hydroxide, 6 parts of wear-resistant agent, 1.5 parts of dibutyltin dilaurate and 10 parts of curing agent under stirring, fully mixing and stirring, and discharging to obtain the adhesive.
Comparative example 3
The self-curing coating insulating material for the electrified railway carrier cable is prepared from the following components in parts by weight: 50 parts of gamma-trifluoropropyl methyl polysiloxane, 40 parts of alpha, omega-divinyl polydimethylsiloxane, 10 parts of methyltriethoxysilane, 6 parts of aluminum hydroxide, 6 parts of wear-resistant agent, 15 parts of aluminum nitride and 1.5 parts of dibutyl tin dilaurate; the molecular weight of the gamma-trifluoro propyl methyl polysiloxane is 120000, and the viscosity is 100Pa & lt, s; the molecular weight of the alpha, omega-divinyl polydimethylsiloxane is 130000, and the viscosity is 80Pa & lt s > the wear-resistant agent is glass beads and bis- [ gamma- (triethoxysilyl) propyl ] tetrasulfide, and the mass ratio is 1: 1.
The preparation method of the self-curing coating insulating material for the electrified railway carrier cable comprises the following steps:
(1) Taking 50 parts of gamma-trifluoropropyl methyl polysiloxane and 40 parts of alpha, omega-divinyl polydimethylsiloxane according to parts by weight, and fully mixing by a planetary mixer to obtain primary mixed glue;
(2) Adding 15 parts of aluminum nitride into the primary mixed glue obtained in the step (1), sealing and fully mixing in a kneader, and grinding by a roller to obtain a base glue;
(3) And cooling the base adhesive, adding 6 parts of aluminum hydroxide, 6 parts of wear-resistant agent, 1.5 parts of dibutyltin dilaurate and 10 parts of methyltriethoxysilane under stirring, fully mixing and stirring, and discharging to obtain the adhesive.
Comparative example 4
The self-curing coating insulating material for the electrified railway carrier cable is prepared from the following components in parts by weight: 50 parts of gamma-trifluoropropyl methyl polysiloxane, 40 parts of alpha, omega-divinyl polydimethylsiloxane, 10 parts of vinyl tributylketoximino silane, 6 parts of aluminum hydroxide, 6 parts of an antiwear agent, 15 parts of aluminum nitride and 1.5 parts of dibutyl tin dilaurate; the molecular weight of the gamma-trifluoro propyl methyl polysiloxane is 120000, and the viscosity is 100Pa & lt, s; the molecular weight of the alpha, omega-divinyl polydimethylsiloxane is 130000, and the viscosity is 80Pa & lt s > the wear-resistant agent is glass beads and bis- [ gamma- (triethoxysilyl) propyl ] tetrasulfide, and the mass ratio is 1: 1.
The preparation method of the self-curing coating insulating material for the electrified railway carrier cable comprises the following steps:
(1) Taking 50 parts of gamma-trifluoropropyl methyl polysiloxane and 40 parts of alpha, omega-divinyl polydimethylsiloxane according to parts by weight, and fully mixing by a planetary mixer to obtain primary mixed glue;
(2) Adding 15 parts of aluminum nitride into the primary mixed glue obtained in the step (1), sealing and fully mixing in a kneader, and grinding by a roller to obtain a base glue;
(3) And cooling the base adhesive, adding 6 parts of aluminum hydroxide, 6 parts of wear-resistant agent, 1.5 parts of dibutyltin dilaurate and 10 parts of vinyl tributyl ketoxime silane under stirring, fully mixing and stirring, and discharging to obtain the adhesive.
Comparative example 5
The self-curing coating insulating material for the electrified railway carrier cable is prepared from the following components in parts by weight: 50 parts of gamma-trifluoropropyl methyl polysiloxane, 40 parts of alpha, omega-divinyl polydimethylsiloxane, 10 parts of curing agent, 6 parts of aluminum hydroxide, 6 parts of glass beads, 15 parts of aluminum nitride and 1.5 parts of dibutyl tin dilaurate; the molecular weight of the gamma-trifluoro propyl methyl polysiloxane is 120000, and the viscosity is 100Pa & lt, s; the molecular weight of the alpha, omega-divinyl polydimethylsiloxane is 130000, and the viscosity is 80Pa & lt s > the curing agent is methyl triethoxy silane and vinyl tributyl ketoxime silane according to the mass ratio of 3: 1.
The preparation method of the self-curing coating insulating material for the electrified railway carrier cable comprises the following steps:
(1) Taking 50 parts of gamma-trifluoropropyl methyl polysiloxane and 40 parts of alpha, omega-divinyl polydimethylsiloxane according to parts by weight, and fully mixing by a planetary mixer to obtain primary mixed glue;
(2) Adding 15 parts of aluminum nitride into the primary mixed glue obtained in the step (1), sealing and fully mixing in a kneader, and grinding by a roller to obtain a base glue;
(3) And cooling the base adhesive, adding 6 parts of aluminum hydroxide, 6 parts of glass beads, 1.5 parts of dibutyltin dilaurate and 10 parts of a curing agent under stirring, fully mixing and stirring, and discharging to obtain the adhesive.
Comparative example 6
The self-curing coating insulating material for the electrified railway carrier cable is prepared from the following components in parts by weight: 50 parts of gamma-trifluoropropyl methyl polysiloxane, 40 parts of alpha, omega-divinyl polydimethylsiloxane, 10 parts of curing agent, 6 parts of aluminum hydroxide, 6 parts of bis- [ gamma- (triethoxysilyl) propyl ] tetrasulfide, 15 parts of aluminum nitride and 1.5 parts of dibutyl tin dilaurate; the molecular weight of the gamma-trifluoro propyl methyl polysiloxane is 120000, and the viscosity is 100Pa & lt, s; the molecular weight of the alpha, omega-divinyl polydimethylsiloxane is 130000, and the viscosity is 80Pa & lt s > the curing agent is methyl triethoxy silane and vinyl tributyl ketoxime silane according to the mass ratio of 3: 1.
The preparation method of the self-curing coating insulating material for the electrified railway carrier cable comprises the following steps:
(1) Taking 50 parts of gamma-trifluoropropyl methyl polysiloxane and 40 parts of alpha, omega-divinyl polydimethylsiloxane according to parts by weight, and fully mixing by a planetary mixer to obtain primary mixed glue;
(2) Adding 15 parts of aluminum nitride into the primary mixed glue obtained in the step (1), sealing and fully mixing in a kneader, and grinding by a roller to obtain a base glue;
(3) And cooling the base adhesive, adding 6 parts of aluminum hydroxide, 6 parts of bis- [ gamma- (triethoxysilyl) propyl ] tetrasulfide, 1.5 parts of dibutyltin dilaurate and 10 parts of curing agent under stirring, fully mixing and stirring, and discharging to obtain the adhesive.
Specific technical parameters and cured properties of the self-curing coated insulating material for the electrified railway carrier cable prepared in the above example 1 are summarized in the following table 1:
TABLE 1
| Project | Unit (B) | Measurement value |
| Density of | g/cm 3 | 1.07 |
| Curing time | min | 30.4 |
| Possessing intensity time | h | 3.2 |
| Hardness of | Shore A | 38 |
| Tensile Strength | Mpa | 14.3 |
| Elongation at break | % | 320 |
| Adhesion force | N/cm | 26.9 |
| Flame retardant FV | Stage | FV-1 |
| Wear resistance (abrasion loss) | g | 0.24 |
Tensile testing uses the UL758/UL1581 standard, wherein the tensile strength gauge: 50mm; stretching speed of elongation: 500mm/min; the heat aging test uses the UL758/UL1581 standard, wherein the test conditions for tensile strength residual ratio: 136 ℃ x 168h; elongation rate of elongation residue: 500mm/min; sample materials prepared in examples 1 to 3 and comparative examples 1 to 2 were measured, and each material was repeatedly measured 5 times.
Statistical analysis was performed using SPSS 24.0 software, the data results were expressed as' x s (mean square error), the data normalization was verified using the Kolmogorov-Smirnov test, for data meeting the normal distribution, the mean difference between the two groups was compared using t-test, the difference was statistically significant using P <0.05, and the results were shown in table 2:
TABLE 2
| Experimental group | Tensile strength Mpa | Residual tensile strength% |
| Example 1 | 14.3±0.2 | 94.6±1.2 |
| Example 2 | 14.6±0.4 | 95.1±1.5 |
| Example 3 | 14.1±0.3 | 94.5±1.6 |
| Comparative example 1 | 11.3±0.2* | 85.6±1.7* |
| Comparative example 2 | 11.6±0.1* | 94.9±2.1* |
Note that: * Representing a comparison of P <0.05 with example 1 group.
The sample materials prepared in examples 1 to 3 and comparative examples 3 to 4 were each repeatedly measured 5 times for the curing time corresponding to the absence of pits after being released by pressing with a finger, and for the possessing strength time corresponding to the time when the tensile strength was measured to be higher than 11Mpa, and the measurement results are shown in table 3:
TABLE 3 Table 3
| Experimental group | Curing time min | Possessing intensity time h |
| Example 1 | 30.4±1.3 | 3.2±0.2 |
| Example 2 | 34.6±0.9 | 3.1±0.5 |
| Example 3 | 29.8±1.3 | 3.8±0.1 |
| Comparative example 3 | 38.3±1.2* | 5.6±0.2* |
| Comparative example 4 | 41.6±1.5* | 5.9±0.1* |
Note that: * Representing a comparison of P <0.05 with example 1 group.
The sample materials prepared in examples 1 to 3 and comparative examples 5 to 6 were tested for abrasion resistance using an MZ-4061 type Alcloned abrasion machine. The main technical indexes are as follows: the acting force applied by the rubber wheel is 26.7N, the revolution speed of the rubber wheel shaft is 76+/-2 rpm, and the revolution radius of the rubber wheel shaft is 34+/-1 cm. The angle between the rubber wheel shaft and the grinding wheel shaft is 0-45 degrees. The supply voltage was AC220v±10% V.
The testing steps are as follows:
(1) The glue wheel with the adhered sample is fixed on a return shaft, the power supply of an electronic counter is connected, a power switch is turned on, a preset number key is adjusted to 600 turns, the pre-grinding is started by pressing the start button, the pre-grinding is started for 15min, after the number reaches a preset value, the zero clearing button is pressed, the glue wheel is taken down, the glue wheel is weighed by a balance, and the weight A1 is recorded to be accurate to 0.01g.
(2) And fixing the pre-ground rubber wheel on a rubber wheel shaft, adjusting a preset number key to 3000 revolutions, testing the mileage to 1.5km, taking down a sample after the test is finished, brushing off rubber scraps, weighing within 1h, and marking the weight as the mass A2 to be accurate to 0.01g.
(3) And (5) calculating abrasion loss: abrasion loss=a1 to A2 (unit g).
The measurement results are shown in Table 4:
TABLE 4 Table 4
| Experimental group | Abrasion loss g |
| Example 1 | 0.24±0.03 |
| Example 2 | 0.26±0.01 |
| Example 3 | 0.28±0.03 |
| Comparative example 5 | 0.51±0.02* |
| Comparative example 6 | 0.56±0.01* |
Note that: * Representing a comparison of P <0.05 with example 1 group.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (7)
1. The self-curing coating insulating material for the electrified railway carrier cable is characterized by being prepared from the following components in parts by weight: 40-60 parts of gamma-trifluoropropyl methyl polysiloxane, 30-50 parts of alpha, omega-divinyl polydimethylsiloxane, 5-15 parts of curing agent, 3-10 parts of flame retardant, 5-8 parts of wear-resistant agent, 10-20 parts of filler and 0.5-3 parts of catalyst;
the curing agent is methyl triethoxy silane and vinyl tributyl ketoxime silane according to the mass ratio of 3: 1;
the wear-resistant agent is glass beads and bis- [ gamma- (triethoxysilyl) propyl ] tetrasulfide, and the mass ratio is 1: 1.
2. The electrified railway carrier cable self-curing coating insulating material of claim 1 wherein the gamma-trifluoropropyl methyl polysiloxane has a molecular weight of 100000 ～ 150000 and a viscosity of 80 to 120Pa s.
3. The electrified railway carrier cable self-curing coated insulation material of claim 1 wherein the α, ω -divinyl polydimethylsiloxane has a molecular weight of 100000 ～ 150000 and a viscosity of 60 to 100Pa s.
4. The self-curing coated insulating material for the electrified railway carrier cable according to claim 1, wherein the flame retardant is one or more of aluminum hydroxide, zinc borate, antimony oxide, tetraethyl ethylene biphosphate and hexaphenoxy cyclotriphosphazene.
5. The electrified railway carrier cable self-curing coating insulating material of claim 1 wherein the filler is one or more of aluminum nitride, magnesium oxide, boron nitride, and silicon carbide.
6. The electrified railway carrier cable self-curing coated insulation material of claim 1 wherein the catalyst is one or more of dibutyl tin dilaurate, stannous octoate, titanate, triallyl isocyanurate.
7. The method for preparing the self-curing coated insulating material for the carrier cable of the electrified railway, as claimed in claim 1, is characterized by comprising the following steps:
(1) Taking 40-60 parts of gamma-trifluoropropyl methyl polysiloxane and 30-50 parts of alpha, omega-divinyl polydimethylsiloxane according to parts by weight, and fully mixing by a planetary mixer to obtain primary mixed glue;
(2) Adding 10-20 parts of filler into the primary mixed glue obtained in the step (1), sealing and fully mixing in a kneader, and grinding by a roller to obtain base glue;
(3) And cooling the base adhesive, adding 3-10 parts of flame retardant, 5-8 parts of wear-resistant agent, 0.5-3 parts of catalyst and 5-15 parts of curing agent under stirring, fully mixing and stirring, and discharging to obtain the flame retardant.
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| JPH06220328A (en) * | 1993-01-27 | 1994-08-09 | Toray Dow Corning Silicone Co Ltd | Room temperature-curing organopolysiloxane composition |
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