CN116376148A - Fatigue-resistant cable material for elevator - Google Patents

Fatigue-resistant cable material for elevator Download PDF

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Publication number
CN116376148A
CN116376148A CN202310389655.1A CN202310389655A CN116376148A CN 116376148 A CN116376148 A CN 116376148A CN 202310389655 A CN202310389655 A CN 202310389655A CN 116376148 A CN116376148 A CN 116376148A
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fatigue
parts
stirring
cable material
resistant cable
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CN116376148B (en
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李同兵
汤浩
祁智升
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Guangdong Antop Polymer Technology Co ltd
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Guangdong Antopu Polymer Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
    • C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
    • H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2217—Oxides; Hydroxides of metals of magnesium
    • C08K2003/2224—Magnesium hydroxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2227—Oxides; Hydroxides of metals of aluminium
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/38—Boron-containing compounds
    • C08K2003/387—Borates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/02—Flame or fire retardant/resistant
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/20—Applications use in electrical or conductive gadgets
    • C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention discloses a fatigue-resistant cable material for an elevator, which belongs to the technical field of elevator cables and comprises the following raw materials in parts by weight: 60-80 parts of polyolefin elastomer resin, 20-40 parts of ethylene acrylic ester rubber, 0.4-1 part of initiator, 100-160 parts of flame retardant filler, 8-15 parts of modified glass fiber, 4-7 parts of compatilizer, 1 part of lubricant and 1-3 parts of antioxidant; the raw materials are placed in a mixer, mixed for 5-10min at the temperature of 120-140 ℃, transferred into a double screw extruder, extruded and granulated, and based on the characteristics of excellent heat resistance, aging resistance, low temperature resistance and oil resistance of ethylene acrylic rubber, the invention uses polyolefin elastomer resin and ethylene acrylic rubber as main base materials, and combines auxiliary components such as flame retardant filler, modified glass fiber and the like to prepare the fatigue-resistant cable material for the elevator, and the cable material has excellent fatigue resistance and oil resistance and is very suitable for preparing the elevator cable.

Description

Fatigue-resistant cable material for elevator
Technical Field
The invention belongs to the technical field of elevator cables, and particularly relates to a fatigue-resistant cable material for an elevator.
Background
The elevator is an indispensable equipment of riding instead of walk in the high-rise building, need to move up and down frequently, and the cable that provides working power for the elevator must also be along with its repeated lift, in the elevator high-speed motion, these frequent atress along with the cable, after long-term elevating movement, can appear breaking, damage, bring the result that outage stopped or other relevant functions break.
The conventional elevator cable adopts halogen-containing materials (such as polyvinyl chloride) as an insulating layer and a sheath layer, and when a fire disaster occurs, halogen acid corrosive gas is released by combustion, so that personnel injury is caused, the production of the halogen-free flame retardant sheath is a necessary trend, but the softness and flame retardant performance of the low-smoke halogen-free flame retardant polyolefin cable material are difficult to realize unification, the cracking problem of the cable sheath layer often occurs after a period of operation, serious potential safety hazards are brought to elevator operation, the main reasons are that the realization of the low-smoke halogen-free characteristic of the polyolefin is generally realized by introducing a large amount of inorganic flame retardants, the compatibility between the inorganic flame retardants and the polyolefin base material is poor, the bonding degree is low, the softness, the mechanical strength and other performances of the material are easily caused to deteriorate, the fatigue resistance performance of the cable is poor, the dispersion state of the inorganic flame retardants in the base material is improved by a small molecular coupling agent, although a certain lifting effect is achieved, the interaction force between the small molecular coupling agent and the base material is weak in the melt shearing process, so that the blocking effect of the material on oil-soluble small molecules is reduced, and the elevator cable needs to shuttle between an elevator car and a hoistway, the elevator car and the elevator cable is easy to be corroded by a necessary to provide a good material for the necessary cable.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the fatigue-resistant cable material for the elevator, which has excellent fatigue resistance and oil resistance and is very suitable for preparing the elevator cable.
The aim of the invention can be achieved by the following technical scheme:
the fatigue-resistant cable material for the elevator comprises the following raw materials in parts by weight:
60-80 parts of polyolefin elastomer resin, 20-40 parts of ethylene acrylic ester rubber, 0.4-1 part of initiator, 100-160 parts of flame retardant filler, 8-15 parts of modified glass fiber, 4-7 parts of compatilizer, 1 part of lubricant and 1-3 parts of antioxidant;
the fatigue-resistant cable material for the elevator is prepared by the following steps:
placing the raw materials into a mixer, mixing for 5-10min at 120-140 ℃, transferring into a double screw extruder, and extruding and granulating at 120-145 ℃ to obtain the low-smoke halogen-free flame-retardant cross-linked polyolefin.
Further, the flame retardant filler is prepared by the steps of:
placing the inorganic flame retardant into a mixer, primarily mixing for 20-30min, then uniformly dripping the modifier, stirring and mixing for 10-20min at the rotating speed of 1000-2000r/min to obtain the flame retardant filler, wherein the modifier dosage is 5-10% of the inorganic flame retardant mass.
The modifier is prepared by the following steps:
dehydrating polypropylene glycol under the protection of nitrogen, cooling to room temperature, sequentially adding isophorone diisocyanate and dibutyltin dilaurate, stirring for 30min at a temperature below 30 ℃, heating to 90-95 ℃ and stirring for reaction for 2-3h, adding castor oil, stirring for reaction for 2h at 85 ℃, and cooling to room temperature to obtain a modifier; the mass ratio of polypropylene glycol, isophorone diisocyanate, dibutyltin dilaurate to castor oil is 41:19:0.1:1.5-4.5, wherein the number average molecular weight of the polypropylene glycol is 1000-2000, the hydroxyl value of the castor oil is 79-185mgKOH/g, the polypropylene glycol and isophorone diisocyanate are used as raw materials, the dibutyltin dilaurate is used as a catalyst, the castor oil is used as a cross-linking agent, and the polyurethane solution which contains unsaturated double bonds and is blocked by isocyanate groups, namely the modifier is prepared.
The inorganic flame retardant is prepared from aluminum hydroxide, magnesium hydroxide and zinc borate according to the mass ratio of 10:5-20: 1-5.
Further, the modified glass fiber is prepared by the following steps:
step S1, adding itaconic acid, cyano triol, DMF and p-toluenesulfonic acid into a flask, heating to reflux reaction for 8-10h, and then distilling under reduced pressure to remove a solvent to obtain hyperbranched polyester;
s2, adding the hyperbranched polyester prepared in the step S1 and acetone into a flask, adding boron trifluoride diethyl ether, dropwise adding epoxy chloropropane under stirring, heating to 65 ℃ after the dropwise adding is finished, stirring for reacting for 2 hours, dropwise adding 25wt% sodium hydroxide solution, heating to 75 ℃ for stirring for reacting for 3 hours, cooling to room temperature, filtering, and distilling the filtrate under reduced pressure to remove acetone and water to obtain epoxy group terminated hyperbranched polyester;
and S3, adding the aminated glass fiber into DMF, adding epoxy terminated hyperbranched polyester and triethylamine, heating to 50-70 ℃, stirring for reaction for 4-6 hours, cooling to room temperature after the reaction is finished, carrying out suction filtration, washing a filter cake with deionized water, and drying to obtain the modified glass fiber.
Wherein, in the step S1, the mass ratio of itaconic acid to cyano triol is 13:35-40, wherein the DMF consumption is 8-10 times of the sum of the masses of itaconic acid and cyano triol, and the p-toluenesulfonic acid consumption is 2-5% of the sum of the masses of itaconic acid and cyano triol; the dosage ratio of hyperbranched polyester, acetone, boron trifluoride diethyl etherate, epichlorohydrin and sodium hydroxide solution in step S2 was 8.4g:50-60mL:0.9g:4.7-5.6g:3.1-4.2g; the dosage ratio of the aminated glass fiber, DMF, the epoxy group end capped hyperbranched polyester and the triethylamine in the step S3 is 10g:150-200mL:0.5-1.5g:0.2-0.3g.
Firstly, itaconic acid and cyano triol are used as reaction monomers, hydroxyl-terminated hyperbranched polyester containing cyano and unsaturated double bonds in the molecule is obtained through esterification, then boron trifluoride diethyl ether is used as a catalyst, epoxy chloropropane is used for carrying out end capping treatment on the hyperbranched polyester to obtain epoxy end capped hyperbranched polyester, and finally under the action of triethylamine, the hyperbranched polyester is introduced into the surface of glass fiber through ring opening reaction of amino and epoxy, so that the modified glass fiber is obtained.
The cyano triol is prepared by the following steps:
adding 2-cyanoacetic acid into dichloromethane, stirring, adding 1- (3-dimethylaminopropyl) -3-ethylcarbodiimide hydrochloride (EDC. HCl) and N-hydroxysuccinimide (NHS), stirring for 0.5h, adding tris (hydroxymethyl) aminomethane, continuing to react for 24h, adding deionized water for washing after the reaction is finished, and distilling under reduced pressure to remove dichloromethane to obtain cyano triol;
wherein the dosage ratio of the 2-cyanoacetic acid to the dichloromethane to the 1- (3-dimethylaminopropyl) -3-ethylcarbodiimide hydrochloride to the N-hydroxysuccinimide to the tris (hydroxymethyl) aminomethane is 5-5.5mmol:25-50mL:0.96g:0.56g:5mmol, the carboxyl of 2-cyanoacetic acid and the amino of tris (hydroxymethyl) aminomethane are used for amide reaction to obtain cyano triol.
The aminated glass fiber is obtained by modifying treatment with coupling agents well known to those skilled in the art.
Further, the polyolefin elastomer resin is prepared from an ethylene-octene copolymer and a styrene-ethylene-butene-styrene block copolymer according to a mass ratio of 1: 0.4-0.8.
Further, the initiator is one or more of dicumyl peroxide, di-tert-butyl peroxide and dibenzoyl peroxide.
Further, the compatibilizer is ethylene-octene copolymer grafted maleic anhydride.
Further, the lubricant is one or more of silicone, EBS, PE wax and dimethyl silicone oil.
Further, the antioxidant is one or more of antioxidant 1010, antioxidant 1076 and antioxidant 168.
The invention has the beneficial effects that:
1. based on the excellent heat resistance, ageing resistance and low temperature resistance of ethylene acrylic ester rubber, the invention uses polyolefin elastomer resin and ethylene acrylic ester rubber as main base materials, and combines auxiliary components such as flame retardant filler, modified glass fiber and the like to prepare the fatigue-resistant cable material for the elevator.
2. According to the invention, the inorganic flame retardant is coated by the modifier, isocyanate groups with stronger polarity in the modifier are grafted through chemical reaction and are coated on the surface of the inorganic flame retardant through intermolecular force, the interaction between the inorganic flame retardants is weakened, core-shell structure particles taking the inorganic flame retardants as hard cores and polyurethane as soft shells, namely flame retardant filler are formed, the flame retardant filler is added into a cable base material, the hydrophilicity is reduced after the modification treatment, the interaction force between the flame retardant and the core-shell structure particles is weakened, the dispersibility in the base material is good, the reinforcing and toughening effects are effectively exerted, unsaturated double bonds are contained in the modifier, the polymer molecular chains can be crosslinked with the base material under the action of an initiator, the polymer molecular chains are connected to the surface of the inorganic flame retardant through chemical bonds, the interface bonding degree between the flame retardant filler and the base material is improved, and a compact polymer-filler network is formed, and the composite material has excellent mechanical property and shielding property.
3. The invention utilizes self-made hyperbranched polyester to carry out modification treatment on glass fiber, utilizes the low viscosity and high compatibility of the hyperbranched polymer to improve the dispersibility of the glass fiber in a matrix, introduces unsaturated double bonds, cyano groups and other groups, introduces unsaturated bonds to improve the bonding degree between the glass fiber and a base material, builds a molecular bridge between the glass fiber and an organic base material, improves the bonding strength between the organic base material and an inorganic base material, promotes the transfer of stress between the glass fiber and the organic base material, effectively improves the fatigue resistance of the composite material, and improves the oil resistance of the composite material when the composite material is impacted by the cyano groups, the cavities in the structure of the glass fiber and the hyperbranched polymer can absorb energy, and the toughness of the composite material is improved.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The preparation method of the aminated glass fiber comprises the following steps:
adding 0.5g of silane coupling agent KH-550 into 50mL of 90% ethanol solution with mass fraction, regulating pH to 4 with formic acid, adding 5g of glass fiber, stirring for reaction for 4 hours, filtering, and drying filter cake to obtain aminated glass fiber with length of 10-50 μm.
Example 2
The modified glass fiber is prepared by the following steps:
step S1, adding 13g of itaconic acid, 35g of cyano triol, 384m of LDMF and 0.96g of p-toluenesulfonic acid into a flask, heating to reflux reaction for 8 hours, and distilling under reduced pressure to remove a solvent to obtain hyperbranched polyester;
s2, adding 8.4g of hyperbranched polyester prepared in the step S1 and 50mL of acetone into a flask, adding 0.9g of boron trifluoride diethyl ether, dropwise adding 4.7g of epichlorohydrin under stirring, heating to 65 ℃ after the dropwise adding is finished, stirring for 2 hours, dropwise adding 3.1g of 25wt% sodium hydroxide solution, heating to 75 ℃ and stirring for 3 hours, cooling to room temperature, filtering, and distilling the filtrate under reduced pressure to remove acetone and water to obtain epoxy group terminated hyperbranched polyester;
and S3, adding 10g of the aminated glass fiber obtained in the example 1 into 150mL of DMF, adding 0.5g of epoxy terminated hyperbranched polyester and 0.2g of triethylamine, heating to 50 ℃, stirring and reacting for 4 hours, cooling to room temperature, carrying out suction filtration, washing a filter cake with deionized water, and drying to obtain the modified glass fiber.
The cyano triol is prepared by the following steps:
5mmol of 2-cyanoacetic acid is added into 25mL of dichloromethane, 0.96g of EDC, HCl and 0.56g of NHS are added after stirring, stirring is carried out for 0.5h, 5mmol of tris (hydroxymethyl) aminomethane is added, the reaction is continued for 24h, deionized water is added for washing after the reaction is finished, and dichloromethane is removed through reduced pressure distillation, so that the cyano triol is obtained.
Example 3
The modified glass fiber is prepared by the following steps:
step S1, adding 13g of itaconic acid, 40g of cyano triol, 430mL of DMF and 2.65g of p-toluenesulfonic acid into a flask, heating to reflux reaction for 10h, and removing the solvent by reduced pressure distillation to obtain hyperbranched polyester;
s2, adding 8.4g of hyperbranched polyester prepared in the step S1 and 60mL of acetone into a flask, adding 0.9g of boron trifluoride diethyl ether, dropwise adding 5.6g of epichlorohydrin under stirring, heating to 65 ℃ after the dropwise adding is finished, stirring for 2 hours, dropwise adding 4.2g of 25wt% sodium hydroxide solution, heating to 75 ℃ and stirring for 3 hours, cooling to room temperature, filtering, and distilling the filtrate under reduced pressure to remove acetone and water to obtain epoxy group terminated hyperbranched polyester;
and S3, adding 10g of the aminated glass fiber obtained in the example 1 into 200mL of DMF, adding 1.5g of epoxy terminated hyperbranched polyester and 0.3g of triethylamine, heating to 70 ℃, stirring and reacting for 6 hours, cooling to room temperature after the reaction is finished, carrying out suction filtration, washing a filter cake with deionized water, and drying to obtain the modified glass fiber.
The cyano triol is prepared by the following steps:
5.5mmol of 2-cyanoacetic acid is added into 50mL of dichloromethane, 0.96g of EDC, HCl and 0.56g of NHS are added after stirring, stirring is carried out for 0.5h, 5mmol of tris (hydroxymethyl) aminomethane is added, reaction is continued for 24h, deionized water is added for washing, and dichloromethane is removed through reduced pressure distillation, so that cyano triol is obtained.
Example 4
The flame-retardant filler is prepared by the following steps:
placing 100g of inorganic flame retardant into a mixer, primarily mixing for 20min, uniformly dripping 5g of modifier, stirring and mixing for 20min at the rotating speed of 1000r/min to obtain flame retardant filler, wherein the inorganic flame retardant comprises aluminum hydroxide, magnesium hydroxide and zinc borate according to the mass ratio of 10:5: 1.
The modifier is prepared by the following steps:
41g of polypropylene glycol is subjected to vacuum at 100 ℃ under the protection of nitrogen, dehydration time is 2h, cooling is carried out to room temperature, 19g of isophorone diisocyanate and 0.1g of dibutyltin dilaurate are sequentially added, stirring is carried out for 30min at 30 ℃ or below, heating is carried out to 90 ℃ and stirring is carried out for 3h, 1.5g of castor oil is added, stirring is carried out for 2h at 85 ℃, cooling is carried out to room temperature, thus obtaining the modifier, the number average molecular weight of the polypropylene glycol is 1000-2000, and the hydroxyl value of the castor oil is 79-185mgKOH/g.
Example 5
The flame-retardant filler is prepared by the following steps:
placing 100g of inorganic flame retardant into a mixer, primarily mixing for 30min, uniformly dripping 10g of modifier, stirring and mixing for 20min at the rotating speed of 2000r/min to obtain flame retardant filler, wherein the inorganic flame retardant comprises aluminum hydroxide, magnesium hydroxide and zinc borate according to the mass ratio of 10:20: 5.
The modifier is prepared by the following steps:
41g of polypropylene glycol is subjected to vacuum at 110 ℃ under the protection of nitrogen, dehydration time is 1h, cooling is carried out to room temperature, 19g of isophorone diisocyanate and 0.1g of dibutyltin dilaurate are sequentially added, stirring is carried out for 30min at 30 ℃ or below, heating is carried out to 95 ℃ and stirring is carried out for 3h, 4.5g of castor oil is added, stirring is carried out for 2h at 85 ℃, cooling is carried out to room temperature, thus obtaining the modifier, the number average molecular weight of the polypropylene glycol is 1000-2000, and the hydroxyl value of the castor oil is 79-185mgKOH/g.
Example 6
The fatigue-resistant cable material for the elevator comprises the following raw materials in parts by weight:
60 parts of polyolefin elastomer resin, 40 parts of ethylene acrylic ester rubber, 0.4 part of initiator, 100 parts of flame retardant filler of example 4, 8 parts of modified glass fiber of example 2, 4 parts of ethylene-octene copolymer grafted maleic anhydride, 1 part of lubricant and 1 part of antioxidant;
the fatigue-resistant cable material for the elevator is prepared by the following steps:
the raw materials are placed in a mixer, mixed for 10min at the temperature of 120 ℃, then transferred into a double-screw extruder, and subjected to feeding section 120 ℃, mixing section 130 ℃, extrusion material making section 135 ℃, flange section 140 ℃, machine head section 145 ℃, extrusion granulation, thus obtaining the low-smoke halogen-free flame-retardant cross-linked polyolefin.
Wherein the polyolefin elastomer resin comprises ethylene-octene copolymer and styrene-ethylene-butylene-styrene block copolymer according to the mass ratio of 1:0.4, wherein the initiator is dicumyl peroxide, the lubricant is silicone, and the antioxidant is antioxidant 1010.
Example 7
The fatigue-resistant cable material for the elevator comprises the following raw materials in parts by weight:
70 parts of polyolefin elastomer resin, 30 parts of ethylene acrylic ester rubber, 0.6 part of initiator, 130 parts of flame retardant filler of example 5, 10 parts of modified glass fiber of example 3, 5 parts of ethylene-octene copolymer grafted maleic anhydride, 1 part of lubricant and 2 parts of antioxidant;
the fatigue-resistant cable material for the elevator is prepared by the following steps:
the raw materials are placed in a mixer, mixed for 8min at 130 ℃, then transferred into a double-screw extruder, and subjected to feeding section 120 ℃, mixing section 130 ℃, extrusion material making section 135 ℃, flange section 140 ℃, machine head section 145 ℃, extrusion granulation, thus obtaining the low-smoke halogen-free flame-retardant cross-linked polyolefin.
Wherein the polyolefin elastomer resin comprises ethylene-octene copolymer and styrene-ethylene-butylene-styrene block copolymer according to the mass ratio of 1:0.6, wherein the initiator is di-tert-butyl peroxide, the lubricant is PE wax, and the antioxidant is antioxidant 1076.
Example 8
The fatigue-resistant cable material for the elevator comprises the following raw materials in parts by weight:
80 parts of polyolefin elastomer resin, 20 parts of ethylene acrylic ester rubber, 1 part of initiator, 160 parts of flame retardant filler of example 5, 15 parts of modified glass fiber of example 2, 7 parts of ethylene-octene copolymer grafted maleic anhydride, 1 part of lubricant and 3 parts of antioxidant;
the fatigue-resistant cable material for the elevator is prepared by the following steps:
the raw materials are placed in a mixer, mixed for 5min at 140 ℃, then transferred into a double-screw extruder, and subjected to feeding section 120 ℃, mixing section 130 ℃, extrusion material making section 135 ℃, flange section 140 ℃, machine head section 145 ℃, extrusion granulation, thus obtaining the low-smoke halogen-free flame-retardant cross-linked polyolefin.
Wherein the polyolefin elastomer resin comprises ethylene-octene copolymer and styrene-ethylene-butylene-styrene block copolymer according to the mass ratio of 1:0.8, wherein the initiator is dibenzoyl peroxide, the lubricant is dimethyl silicone oil, and the antioxidant is antioxidant 168.
Comparative example 1
Compared with example 6, the modified glass fiber in example 6 is replaced by the same amount of the material obtained in example 1, and the rest raw materials and the preparation process are the same as those in example 6.
Comparative example 2
Compared with example 7, the flame retardant filler in example 7 is replaced by aluminum hydroxide, magnesium hydroxide and zinc borate in equal amounts according to a mass ratio of 10:20:5, and the rest materials and preparation process are the same as in example 7.
The cable materials obtained in examples 6-8 and comparative examples 1-2 were prepared into samples to be tested, and then subjected to performance testing, tensile properties were tested with reference to the standard GB/T1040-1992 "Plastic tensile Property test method", oxygen indices were tested with reference to the standard GB2406-1993 "Plastic Combustion Performance test method Oxidation index method", flex fatigue times were tested with reference to the test of flex cracking of vulcanized rubber "GB/T13934-1992", the samples to be tested were placed in IRM902 oil respectively, tensile strength change rate was tested after soaking at 70℃for 168 hours, oil resistance was tested, and the test results are shown in Table 1:
TABLE 1
Figure BDA0004175324620000101
As can be seen from Table 1, the cable materials prepared in examples 6 to 8 have not only good mechanical properties and flame retardant properties, but also excellent fatigue resistance and oil resistance, compared with comparative examples 1 to 2.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The fatigue-resistant cable material for the elevator is characterized by comprising the following raw materials in parts by weight:
60-80 parts of polyolefin elastomer resin, 20-40 parts of ethylene acrylic ester rubber, 0.4-1 part of initiator, 100-160 parts of flame retardant filler, 8-15 parts of modified glass fiber, 4-7 parts of compatilizer, 1 part of lubricant and 1-3 parts of antioxidant;
the flame-retardant filler is prepared by the following steps:
dehydrating polypropylene glycol under the protection of nitrogen, cooling to room temperature, sequentially adding isophorone diisocyanate and dibutyltin dilaurate, stirring for 30min at a temperature below 30 ℃, heating to 90-95 ℃ and stirring for reaction for 2-3h, adding castor oil, stirring for reaction for 2h at 85 ℃, and cooling to room temperature to obtain a modifier;
and (3) placing the inorganic flame retardant into a mixer for mixing, then dripping the modifier, and stirring and mixing for 10-20min to obtain the flame retardant filler.
2. The fatigue-resistant cable material for elevator according to claim 1, wherein the mass ratio of polypropylene glycol, isophorone diisocyanate, dibutyltin dilaurate and castor oil is 41:19:0.1:1.5-4.5, the number average molecular weight of polypropylene glycol is 1000-2000, the hydroxyl value of castor oil is 79-185mgKOH/g.
3. The fatigue-resistant cable material for elevator according to claim 1, wherein the modifier is used in an amount of 5 to 10% by mass of the inorganic flame retardant.
4. The fatigue-resistant cable material for elevator according to claim 1, wherein the inorganic flame retardant is prepared from aluminum hydroxide, magnesium hydroxide and zinc borate in a mass ratio of 10:5-20: 1-5.
5. The fatigue-resistant cable material for elevator according to claim 1, wherein the modified glass fiber is prepared by the steps of:
s1, adding itaconic acid, cyano triol, DMF and p-toluenesulfonic acid into a flask, and carrying out reflux reaction for 8-10h to obtain hyperbranched polyester;
s2, adding hyperbranched polyester and acetone into a flask, adding boron trifluoride diethyl etherate, dropwise adding epichlorohydrin under stirring, heating to 65 ℃ after the dropwise adding, stirring for reacting for 2 hours, dropwise adding 25wt% sodium hydroxide solution, and stirring for reacting for 3 hours at 75 ℃ to obtain epoxy group terminated hyperbranched polyester;
and S3, adding the aminated glass fiber into DMF, adding epoxy group end-capped hyperbranched polyester and triethylamine, heating to 50-70 ℃, and stirring for reaction for 4-6 hours to obtain the modified glass fiber.
6. The fatigue-resistant cable material for elevator according to claim 5, wherein the mass ratio of itaconic acid to cyano triol is 13:35-40, wherein the DMF consumption is 8-10 times of the sum of the masses of the itaconic acid and the cyano triol, and the p-toluenesulfonic acid consumption is 2-5% of the sum of the masses of the itaconic acid and the cyano triol.
7. The fatigue-resistant cable material for elevator according to claim 5, wherein the amount ratio of hyperbranched polyester, acetone, boron trifluoride diethyl etherate, epichlorohydrin and sodium hydroxide solution is 8.4g:50-60mL:0.9g:4.7-5.6g:3.1-4.2g.
8. The fatigue-resistant cable material for elevator according to claim 5, wherein the amount ratio of the aminated glass fiber, DMF, epoxy-terminated hyperbranched polyester and triethylamine is 10g:150-200mL:0.5-1.5g:0.2-0.3g.
9. The fatigue resistant cable material for elevator according to claim 5, wherein the cyano triol is prepared by the steps of:
adding 2-cyanoacetic acid into dichloromethane, stirring, adding 1- (3-dimethylaminopropyl) -3-ethylcarbodiimide hydrochloride and N-hydroxysuccinimide, stirring for 0.5h, adding tris (hydroxymethyl) aminomethane, and continuing to react for 24h to obtain cyano triol.
10. The fatigue-resistant cable material for elevator according to claim 9, wherein the dosage ratio of 2-cyanoacetic acid, methylene chloride, 1- (3-dimethylaminopropyl) -3-ethylcarbodiimide hydrochloride, N-hydroxysuccinimide and tris (hydroxymethyl) aminomethane is 5 to 5.5mmol:25-50mL:0.96g:0.56g:5mmol.
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