CN105131576A - Halogen-free flame retardant environment-friendly flexible cable sheathing compound for portable power source and preparation method of sheathing compound - Google Patents

Abstract

The invention discloses a halogen-free flame retardant environment-friendly flexible cable sheathing compound for a portable power source. The sheathing compound is characterized by being prepared from the following raw materials in parts by weight: 100-102 parts of polyether urethane, 20-21.5 parts of diethyl aluminium hypophosphite, 17-18 parts of melamine cyanurate, 4.3-4.5 parts of aluminium titanate, 50-52 parts of PVC, 1.6-1.8 parts of a cross-linking agent TAIC, 6-7 parts of calcium stearate, 20-22 parts of acetyl tributyl citrate, 4-5 parts of urea, 5-6 parts of powdered phenolic resin, 7-8 parts of cotton pulp, 1.5-2 parts of magnesium methacrylate, 3-4 parts of white oil, 9-11 parts of carbon nano tubes, 2-3 parts of zinc oxide and 1-1.2 parts of allyltriethoxysilane. The halogen-free flame retardant environment-friendly flexible cable sheathing compound provided by the invention is not liable to cracking, fold-resistant, halogen-free, flame retardant, harmless to the environment and human bodies, long in service life and suitable for manufacture of cable materials of portable power sources and sheathing compounds of mobile phone data cables.

Description

A kind of halogen-free flame-proof environmental protection portable power source soft type cable sheath material and preparation method thereof

Technical field

The present invention relates to technical field of polymer materials, particularly relate to a kind of halogen-free flame-proof environmental protection portable power source soft type cable sheath material and preparation method thereof.

Background technology

Thermoplastic polyurethane is the elastomer material be polymerized by vulcabond, polyvalent alcohol and chainextender, and it has high strength, snappiness, wear-resisting, oil resistant, weather, the feature such as low temperature resistant, soft, and this is that comprehensive any rubber and plastics do not possess entirely.Polyether-type and the large class of polyester type two can be divided into according to molecular structure, because the environment for use of cable is more complicated, the work-ing life required is more than 10 years, and the high temperature anti-hydrolytic performance of PAUR is poor, and low temperature flexibility is also not as good as polyether-type, therefore in field of cables many uses polyether polyurethane material.The oxygen index of polyether polyurethane material only has 18%, belong to inflammable material, and there is dense smoke and with toxic gas and serious molten drop during burning, and the price of urethane is relatively high, which limits the application on cable industry, therefore need to carry out above flame-retardant modified and composition to polyether(poly)urethane cross-linking modified.The cost of PVC is low, application wide, is a kind of important general-purpose plastics, have research by polyether(poly)urethane and PVC blended, obtain that cost is low, the material of excellent processing performance.The present invention then wishes to be undertaken cross-linking modified by polyether(poly)urethane and PVC, by the interpolation of flame-retardant composition, prepare that a kind of cost is low, applied range, fire-retardant fireproof excellent performance, processing fluidity is good, resistance to low temperature is good flexible cable sheath material.

The tie cable of existing portable power source is due to structure and material, easily damaged during use, not resistance to complications, easy fracture, flame retardant properties is poor, affects the security of the learning life of people, and this just needs the flexible cable sheath material producing a kind of high performance portable power source on probation.

Summary of the invention

The object of the invention is exactly the defect in order to make up prior art, provides a kind of halogen-free flame-proof environmental protection portable power source soft type cable sheath material and preparation method thereof.

The present invention is achieved by the following technical solutions:

A kind of halogen-free flame-proof environmental protection portable power source soft type cable sheath material, is made up of the raw material of following weight part: polyether(poly)urethane 100-102, aluminum diethylphosphinate 20-21.5, melamine cyanurate 17-18, aluminium titanates 4.3-4.5, PVC50-52, linking agent TAIC1.6-1.8, calcium stearate 6-7, tributyl acetylcitrate 20-22, urea 4-5, Powdered phenolic resins 5-6, Cotton Pulp 7-8, magnesium dimethacrylate 1.5-2, white oil 3-4, carbon nanotube 9-11, zinc oxide 2-3, propenyl triethoxyl silane 1-1.2.

Described a kind of halogen-free flame-proof environmental protection portable power source soft type cable sheath material, be made up of following concrete steps:

(1) calcium stearate of aluminum diethylphosphinate, melamine cyanurate, aluminium titanates, half amount is put into high-speed mixer, after stirring 10 minutes with the speed of 1000 revs/min under normal temperature, then 80 DEG C are heated to, stir 15 minutes with the speed of 1200 revs/min, obtain finely dispersed compound flame retardant; Polyether(poly)urethane being placed on temperature is in the air dry oven of 90 DEG C dry 3 hours, sealing sends into two roller mill after taking out after being cooled to room temperature, before and after controlling, roll temperature is 130 DEG C, begin to pratise 2-3 minute, add compound flame retardant again, pour out after continuing to begin to pratise 8 minutes, send in twin screw extruder, be extruding pelletization under the condition of 140 DEG C in temperature, obtain flame-retardant modified polyether(poly)urethane masterbatch;

(2) by PVC, linking agent TAIC, tributyl acetylcitrate and remaining calcium stearate join in high-speed mixer, temperature control 100 DEG C, 10 minutes are stirred with the speed of 1000 revs/min, then material is put into cold mixer, stir with the speed of 200 revs/min, until add the flame-retardant modified polyether(poly)urethane masterbatch that step (2) obtains when material is cooled to room temperature, discharging after mixing 5 minutes with the speed of 1000 revs/min at normal temperatures, again the material mixed is sent in parallel double-screw extruder, mix 30 minutes, controlling extrusion temperature is 145 DEG C, extruding pelletization, obtain cross-linking modified masterbatch,

(3) by Urea to melting, mix with white oil, add carbon nanotube, zinc oxide, put into ball mill ball milling 2 hours, mix with Cotton Pulp after pouring out, add propenyl triethoxyl silane, put into high-speed mixer, stir 10 minutes with the speed of 1000 revs/min, continue to add Powdered phenolic resins, be heated to 80 DEG C, continue stirring to pour out after 5 minutes, pulverize after cooling drying, cross 400 mesh sieves, obtain modified filler;

(4) modified filler that cross-linking modified masterbatch step (2) obtained and step (3) obtain and all the other remaining components are sent in twin screw extruder jointly, mix after 10 minutes, with the temperature extruding pelletization of 150 DEG C and get final product.

Advantage of the present invention is: the present invention adopts aluminum diethylphosphinate and melamine cyanurate to be main flame retardant in the modification of polyether(poly)urethane, composite aluminium titanates, synergy, effectively can improve the neat coal amout of combustion processes, and make layer of charcoal finer and close, also reduce maximum heat rate of release simultaneously, demonstrate excellent fire-retardant fireproof effect; Recycling PVC and modified polyether(poly)urethane are cross-linked, and flame retardant properties strengthens further, not only maintains urethane softness, wear-resisting, low temperature resistant character, reduces cost simultaneously, improve the thermostability of crosslinked material, be more suitable for the market requirement.

Carbon nanotube, Powdered phenolic resins, Cotton Pulp etc. are made modified filler by a series of technique by the present invention, enhance the intensity of material, elasticity, snappiness and ductility; CABLE MATERIALS of the present invention complications not easy to crack, resistance to, approximately fire-retardant, to environment and body harmless, long service life, is applicable to manufacturing portable power source CABLE MATERIALS, cellular phone data line sheath material etc.

Embodiment

A kind of halogen-free flame-proof environmental protection portable power source soft type cable sheath material, is made up of the raw material of following weight part (kilogram): polyether(poly)urethane 100, aluminum diethylphosphinate 20, melamine cyanurate 17, aluminium titanates 4.3, PVC50, linking agent TAIC1.6, calcium stearate 6, tributyl acetylcitrate 20, urea 4, Powdered phenolic resins 5, Cotton Pulp 7, magnesium dimethacrylate 1.5, white oil 3, carbon nanotube 9, zinc oxide 2, propenyl triethoxyl silane 1.

Described a kind of halogen-free flame-proof environmental protection portable power source soft type cable sheath material, be made up of following concrete steps:

(1) calcium stearate of aluminum diethylphosphinate, melamine cyanurate, aluminium titanates, half amount is put into high-speed mixer, after stirring 10 minutes with the speed of 1000 revs/min under normal temperature, then 80 DEG C are heated to, stir 15 minutes with the speed of 1200 revs/min, obtain finely dispersed compound flame retardant; Polyether(poly)urethane being placed on temperature is in the air dry oven of 90 DEG C dry 3 hours, sealing sends into two roller mill after taking out after being cooled to room temperature, before and after controlling, roll temperature is 130 DEG C, begin to pratise 3 minutes, add compound flame retardant again, pour out after continuing to begin to pratise 8 minutes, send in twin screw extruder, be extruding pelletization under the condition of 140 DEG C in temperature, obtain flame-retardant modified polyether(poly)urethane masterbatch;

(2) by PVC, linking agent TAIC, tributyl acetylcitrate and remaining calcium stearate join in high-speed mixer, temperature control 100 DEG C, 10 minutes are stirred with the speed of 1000 revs/min, then material is put into cold mixer, stir with the speed of 200 revs/min, until add the flame-retardant modified polyether(poly)urethane masterbatch that step (2) obtains when material is cooled to room temperature, discharging after mixing 5 minutes with the speed of 1000 revs/min at normal temperatures, again the material mixed is sent in parallel double-screw extruder, mix 30 minutes, controlling extrusion temperature is 145 DEG C, extruding pelletization, obtain cross-linking modified masterbatch,

(3) by Urea to melting, mix with white oil, add carbon nanotube, zinc oxide, put into ball mill ball milling 2 hours, mix with Cotton Pulp after pouring out, add propenyl triethoxyl silane, put into high-speed mixer, stir 10 minutes with the speed of 1000 revs/min, continue to add Powdered phenolic resins, be heated to 80 DEG C, continue stirring to pour out after 5 minutes, pulverize after cooling drying, cross 400 mesh sieves, obtain modified filler;

(4) modified filler that cross-linking modified masterbatch step (2) obtained and step (3) obtain and all the other remaining components are sent in twin screw extruder jointly, mix after 10 minutes, with the temperature extruding pelletization of 150 DEG C and get final product.

By the production of materials application of the present invention in cable, after testing, the index reached is as follows for cable product: tensile strength is 26.6MPa, and fracture extension rate is 300.5%, and oxygen index >=30%, flame retardant properties reaches UL-94V-0 level.

Claims (2)

1. a halogen-free flame-proof environmental protection portable power source soft type cable sheath material, it is characterized in that, be made up of the raw material of following weight part: polyether(poly)urethane 100-102, aluminum diethylphosphinate 20-21.5, melamine cyanurate 17-18, aluminium titanates 4.3-4.5, PVC50-52, linking agent TAIC1.6-1.8, calcium stearate 6-7, tributyl acetylcitrate 20-22, urea 4-5, Powdered phenolic resins 5-6, Cotton Pulp 7-8, magnesium dimethacrylate 1.5-2, white oil 3-4, carbon nanotube 9-11, zinc oxide 2-3, propenyl triethoxyl silane 1-1.2.

2. a kind of halogen-free flame-proof environmental protection portable power source soft type cable sheath material according to claim 1, is characterized in that, be made up of following concrete steps:

(1) calcium stearate of aluminum diethylphosphinate, melamine cyanurate, aluminium titanates, half amount is put into high-speed mixer, after stirring 10 minutes with the speed of 1000 revs/min under normal temperature, then 80 DEG C are heated to, stir 15 minutes with the speed of 1200 revs/min, obtain finely dispersed compound flame retardant; Polyether(poly)urethane being placed on temperature is in the air dry oven of 90 DEG C dry 3 hours, sealing sends into two roller mill after taking out after being cooled to room temperature, before and after controlling, roll temperature is 130 DEG C, begin to pratise 2-3 minute, add compound flame retardant again, pour out after continuing to begin to pratise 8 minutes, send in twin screw extruder, be extruding pelletization under the condition of 140 DEG C in temperature, obtain flame-retardant modified polyether(poly)urethane masterbatch;

(2) by PVC, linking agent TAIC, tributyl acetylcitrate and remaining calcium stearate join in high-speed mixer, temperature control 100 DEG C, 10 minutes are stirred with the speed of 1000 revs/min, then material is put into cold mixer, stir with the speed of 200 revs/min, until add the flame-retardant modified polyether(poly)urethane masterbatch that step (2) obtains when material is cooled to room temperature, discharging after mixing 5 minutes with the speed of 1000 revs/min at normal temperatures, again the material mixed is sent in parallel double-screw extruder, mix 30 minutes, controlling extrusion temperature is 145 DEG C, extruding pelletization, obtain cross-linking modified masterbatch,

(3) by Urea to melting, mix with white oil, add carbon nanotube, zinc oxide, put into ball mill ball milling 2 hours, mix with Cotton Pulp after pouring out, add propenyl triethoxyl silane, put into high-speed mixer, stir 10 minutes with the speed of 1000 revs/min, continue to add Powdered phenolic resins, be heated to 80 DEG C, continue stirring to pour out after 5 minutes, pulverize after cooling drying, cross 400 mesh sieves, obtain modified filler;

(4) modified filler that cross-linking modified masterbatch step (2) obtained and step (3) obtain and all the other remaining components are sent in twin screw extruder jointly, mix after 10 minutes, with the temperature extruding pelletization of 150 DEG C and get final product.