CN105111668A - Waste rubber powder modified flexible flame-retardant sheath material for data lines and preparation method thereof - Google Patents

Abstract

The invention discloses a waste rubber powder modified flexible flame-retardant sheath material for data lines. The material is prepared from, by weight, 90-94 parts of SEBS, 20-23 parts of waste rubber powder, 65-68 parts of paraffin oil, 29-31 parts of polypropylene, 21-23 parts of maleic anhydride-grafted polypropylene, 3-4 parts of antioxidants B215, 81-83 parts of magnesium hydrate, 4.3-5 parts of expanded graphite, 1.6-1.7 parts of silane coupling agents A-171, 8-9 parts of absolute ethyl alcohol, 8-10 parts of precipitated silicon dioxide, 1.5-2 parts of coumarone and 2-3 parts of pine tar. According to the material, a blend of the paraffin oil modified SEBS and the polypropylene serves as a matrix, an appropriate amount of the waste rubber powder is added to replace part of the SEBS, and therefore the production cost can be lowered; meanwhile, modification is performed through a series of processes, the tensile strength and elongation of the material can be improved, and the prepared sheath material is flexible, resistant to fracture, significant in flame-retardant effect, environmentally friendly and free of poison and can be widely applied to the data lines, computer peripheral lines and the like.

Description

Pliable and tough flame-retardant sheath material of a kind of data line shoddy modification and preparation method thereof

Technical field

The present invention relates to technical field of polymer materials, particularly relate to pliable and tough flame-retardant sheath material of a kind of data line shoddy modification and preparation method thereof.

Background technology

At present, the electric wire sheath material of domestic electronic enterprises widespread use, Insulation Material and electronic plug material more than 90% adopt PVC.But from 1 day July in 2006, European Union just promulgated a decree and has forbidden halogen-containing flame retardant, and the electric equipment products of some objectionable impurities such as heavy metal enters European market, and the outlet of this measure to China's electric equipment products creates and have a strong impact on.European Union is while its ban of issue, and abroad some companies have started to promote its product to China's electrical equipment industry industry energetically, attempt to seize China market, develop halogen-free flame-retardant environment-friendly electric wire significant undoubtedly under this form.

Styrene ethylene butadiene-styrene block copolymer (SEBS) is a kind of broad-spectrum thermoplastic elastomer, polypropylene (PP) is used to carry out modification, a kind of thermoplastic elastomer TPE having the characteristic of plastics and rubber concurrently that can make, because TPE has snappiness, high strength, low density, the features such as easy processing, have good insulativity simultaneously, resistant of high or low temperature, fatigue resistance, good hand touch, free from extraneous odour, become the preferred material that electric wire field substitutes PVC, but the halogen-free flameproof of TPE is a difficult problem, how to prepare the important topic that the high flame retarded thermoplastic's elastomerics of over-all properties has become its Application Areas.

Summary of the invention

The object of the invention is exactly the defect in order to make up prior art, provides pliable and tough flame-retardant sheath material of a kind of data line shoddy modification and preparation method thereof.Added to by shoddy for promoting the utilization of waste rubber in the preparation of thermoplastic elastomer jacket for data lines material and research, preserving the ecological environment and creating social economic value has important theory significance and actual value.

The present invention is achieved by the following technical solutions:

A pliable and tough flame-retardant sheath material for data line shoddy modification, is made up of the raw material of following weight part: SEBS90-94, shoddy 20-23, paraffin oil 65-68, polypropylene 29-31, polypropylene grafted maleic anhydride 21-23, oxidation inhibitor B2153-4, magnesium hydroxide 81-83, expanded graphite 4.3-5, silane coupling A-1711.6-1.7, dehydrated alcohol 8-9, precipitated silica 8-10, coumarone 1.5-2, Stockholm tar 2-3.

The pliable and tough flame-retardant sheath material of described a kind of data line shoddy modification, be made up of following concrete steps:

(1) by magnesium hydroxide in air dry oven, at 110 DEG C dry 4 hours for subsequent use; Silane coupling A-171 is added dehydrated alcohol, be sprayed on dry magnesium hydroxide after stirring 30 minutes with the speed of 500 revs/min, then send in high-speed mixer, add expanded graphite, with the speed of 2000 revs/min, stir after 30 minutes at normal temperatures, be warming up to 60 DEG C, continue stirring to take out for 30 minutes, more namely drying obtains compound flame retardant in 3 hours at 110 DEG C;

(2) SEBS, polypropylene, polypropylene grafted maleic anhydride are put into air dry oven respectively, at 80 DEG C dry 4 hours for subsequent use; Dried SEBS is mixed with paraffin oil, puts into high-speed mixer, be uniformly mixed 20 minutes with the speed of 1000 revs/min, leave standstill 12 hours after taking out, treat that SEBS is fully swelling in paraffin oil, obtain oiliness SEBS; Polypropylene, polypropylene grafted maleic anhydride being added two roll temperature is in the open mill of 170 DEG C, oiliness SEBS, oxidation inhibitor B215 is added after plasticating 10 minutes, continue mixing 20 minutes, evenly rear slice to be mixed, put into air dry oven after pulverizing dry 2 hours, namely obtain mixed resin;

(3) shoddy is put into Lowtemperaturepulverizer to pulverize, cross 120 mesh sieves handy, mix with 120 order shoddies after coumarone is mixed with Stockholm tar, send in high-speed mixer, with the speed of 1200/ turn, how stir after 20 minutes under normal temperature, be heated to 200 DEG C, continue mixing 15 minutes, then send in twin screw extruder after cooling, control extrusion temperature 190 DEG C, screw speed is 20 revs/min, extruding pelletization, obtains mixture;

(4) compound flame retardant, mixed resin, mixture and all the other remaining components are put into high-speed mixer, it is 170 DEG C in temperature, discharging after mixing 20 minutes under the speed of 500 revs/min, material is fed in vulcanizing press, hot pressing at 180 DEG C of temperature, then room temperature is colded pressing, is ground into particle after slice, finally sends in twin screw extruder by particle, extruding pelletization, dries 4 hours and get final product under 80 DEG C of conditions.

Advantage of the present invention is: the present invention adds the magnesium hydroxide of surface modification, in hydrophobic effect, composite with expanded graphite, there is good fire-resistant synergistic effect, carbon yield and the oxygen index of system can be improved, can the effectively release of trap heat and the conduction of inflammable gas, reduce the amount of being fuming; Can obviously reduce particle agglomeration effect simultaneously, can disperse more even in base-material, improve the consistency with base-material interface, improve viscosity and the processing characteristics of compound, improve the mechanical property of compound.

The present invention with paraffin oil modified SEBS and polyacrylic blend for matrix, add appropriate shoddy Substitute For Partial SEBS, production cost can be reduced, simultaneously by a series of process modification, can improve tensile strength and the elongation of product, processing fluidity is good simultaneously, the pliable and tough anti-folding of the sheath material made, and flame retardant effect is remarkable, environment-protecting asepsis, can be widely used in data line, computer peripheral line etc.

Embodiment

A pliable and tough flame-retardant sheath material for data line shoddy modification, is made up of the raw material of following weight part (kilogram): SEBS90, shoddy 20, paraffin oil 65, polypropylene 29, polypropylene grafted maleic anhydride 21, oxidation inhibitor B2153, magnesium hydroxide 81, expanded graphite 4.3, silane coupling A-1711.6, dehydrated alcohol 8, precipitated silica 8, coumarone 1.5, Stockholm tar 2.

The pliable and tough flame-retardant sheath material of described a kind of data line shoddy modification, be made up of following concrete steps:

(1) by magnesium hydroxide in air dry oven, at 110 DEG C dry 4 hours for subsequent use; Silane coupling A-171 is added dehydrated alcohol, be sprayed on dry magnesium hydroxide after stirring 30 minutes with the speed of 500 revs/min, then send in high-speed mixer, add expanded graphite, with the speed of 2000 revs/min, stir after 30 minutes at normal temperatures, be warming up to 60 DEG C, continue stirring to take out for 30 minutes, more namely drying obtains compound flame retardant in 3 hours at 110 DEG C;

(2) SEBS, polypropylene, polypropylene grafted maleic anhydride are put into air dry oven respectively, at 80 DEG C dry 4 hours for subsequent use; Dried SEBS is mixed with paraffin oil, puts into high-speed mixer, be uniformly mixed 20 minutes with the speed of 1000 revs/min, leave standstill 12 hours after taking out, treat that SEBS is fully swelling in paraffin oil, obtain oiliness SEBS; Polypropylene, polypropylene grafted maleic anhydride being added two roll temperature is in the open mill of 170 DEG C, oiliness SEBS, oxidation inhibitor B215 is added after plasticating 10 minutes, continue mixing 20 minutes, evenly rear slice to be mixed, put into air dry oven after pulverizing dry 2 hours, namely obtain mixed resin;

(3) shoddy is put into Lowtemperaturepulverizer to pulverize, cross 120 mesh sieves handy, mix with 120 order shoddies after coumarone is mixed with Stockholm tar, send in high-speed mixer, with the speed of 1200/ turn, how stir after 20 minutes under normal temperature, be heated to 200 DEG C, continue mixing 15 minutes, then send in twin screw extruder after cooling, control extrusion temperature 190 DEG C, screw speed is 20 revs/min, extruding pelletization, obtains mixture;

(4) compound flame retardant, mixed resin, mixture and all the other remaining components are put into high-speed mixer, it is 170 DEG C in temperature, discharging after mixing 20 minutes under the speed of 500 revs/min, material is fed in vulcanizing press, hot pressing at 180 DEG C of temperature, then room temperature is colded pressing, is ground into particle after slice, finally sends in twin screw extruder by particle, extruding pelletization, dries 4 hours and get final product under 80 DEG C of conditions.

The jacket for data lines material that the present invention produces, after testing, reaches following index: flame retardant properties reaches UL-94V-0 level, oxygen index >=30.8%, tensile strength >=14.3MPa, fracture extension rate >=253%.

Claims (2)

1. the pliable and tough flame-retardant sheath material of data line shoddy modification, it is characterized in that, be made up of the raw material of following weight part: SEBS90-94, shoddy 20-23, paraffin oil 65-68, polypropylene 29-31, polypropylene grafted maleic anhydride 21-23, oxidation inhibitor B2153-4, magnesium hydroxide 81-83, expanded graphite 4.3-5, silane coupling A-1711.6-1.7, dehydrated alcohol 8-9, precipitated silica 8-10, coumarone 1.5-2, Stockholm tar 2-3.

2. the pliable and tough flame-retardant sheath material of a kind of data line shoddy modification according to claim 1, is characterized in that, is made up of following concrete steps:

(1) by magnesium hydroxide in air dry oven, at 110 DEG C dry 4 hours for subsequent use; Silane coupling A-171 is added dehydrated alcohol, be sprayed on dry magnesium hydroxide after stirring 30 minutes with the speed of 500 revs/min, then send in high-speed mixer, add expanded graphite, with the speed of 2000 revs/min, stir after 30 minutes at normal temperatures, be warming up to 60 DEG C, continue stirring to take out for 30 minutes, more namely drying obtains compound flame retardant in 3 hours at 110 DEG C;

(2) SEBS, polypropylene, polypropylene grafted maleic anhydride are put into air dry oven respectively, at 80 DEG C dry 4 hours for subsequent use; Dried SEBS is mixed with paraffin oil, puts into high-speed mixer, be uniformly mixed 20 minutes with the speed of 1000 revs/min, leave standstill 12 hours after taking out, treat that SEBS is fully swelling in paraffin oil, obtain oiliness SEBS; Polypropylene, polypropylene grafted maleic anhydride being added two roll temperature is in the open mill of 170 DEG C, oiliness SEBS, oxidation inhibitor B215 is added after plasticating 10 minutes, continue mixing 20 minutes, evenly rear slice to be mixed, put into air dry oven after pulverizing dry 2 hours, namely obtain mixed resin;

(3) shoddy is put into Lowtemperaturepulverizer to pulverize, cross 120 mesh sieves handy, mix with 120 order shoddies after coumarone is mixed with Stockholm tar, send in high-speed mixer, with the speed of 1200/ turn, how stir after 20 minutes under normal temperature, be heated to 200 DEG C, continue mixing 15 minutes, then send in twin screw extruder after cooling, control extrusion temperature 190 DEG C, screw speed is 20 revs/min, extruding pelletization, obtains mixture;

(4) compound flame retardant, mixed resin, mixture and all the other remaining components are put into high-speed mixer, it is 170 DEG C in temperature, discharging after mixing 20 minutes under the speed of 500 revs/min, material is fed in vulcanizing press, hot pressing at 180 DEG C of temperature, then room temperature is colded pressing, is ground into particle after slice, finally sends in twin screw extruder by particle, extruding pelletization, dries 4 hours and get final product under 80 DEG C of conditions.