CN106543708A - A kind of LED illumination fills heat conductive flame-retarding nylon polyphenylene oxide composite material with ultralow - Google Patents
A kind of LED illumination fills heat conductive flame-retarding nylon polyphenylene oxide composite material with ultralow Download PDFInfo
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- C08J2381/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur with or without nitrogen, oxygen, or carbon only; Polysulfones; Derivatives of such polymers
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- C08J2477/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
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- C08J2481/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur with or without nitrogen, oxygen, or carbon only; Polysulfones; Derivatives of such polymers
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- C08L2205/00—Polymer mixtures characterised by other features
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Abstract
The invention discloses a kind of LED illumination lamp ultralow filling high heat conduction, fire-retardant nylon/polyphenyl thioether alloy, which is made up of nylon resin, polyphenylene sulfide, toughener, compatilizer, modified Nano carborundum whisker, antioxidant, lubricant.The heat filling is which is compatible with nylon matrix good through the high-crystallinity high length-diameter ratio nanometer silicon carbide whiskers of epoxy silane coupling KH560 surface treatments;In the present invention, nylon resin is formed in situ bicontinuous structure with polyphenylene sulfide, due to the natural fire-retardant attribute of polyphenylene sulfide and its microcosmic phase morphology of three-dimensional network shape(Similar to the effect of flame-retardant anti-dropping agent politef), the nylon/polyphenylene sulfide alloy material need not do extra flame-retardant modified, and anti-flammability can reach UL94 V0 grades, become the preferable selection of LED illumination lamp cabinet.
Description
Technical field:
The present invention relates to technical field of polymer composite materials, and in particular to a kind of LED illumination fills heat conductive flame-retarding Buddhist nun with ultralow
Imperial polyphenylene oxide composite material.
Background technology:
Typically using aluminium alloy as heat dissipation base, its good heat conductivity, efficiency of thermal transfer are high in traditional lighting field, but also have weight
The shortcomings of amount is big, production efficiency is relatively low, electrical insulating property is poor.Thus, it is easy to processing and forming, production efficiency are high, without the need for surface spraying
Polymer-based heat-conductive composite material gradually rise, and progressively substituted metal Heat Conduction Material.
According to the use environment of LED heat dissipation base, must be requested that material possesses high heat conductivity, heat resistance and resistance
Combustion property.Polymer is compared with metal as heat conduction substrate, and maximum shortcoming is that its heat conductivity is too low, and is readily burned.
In order to overcome these shortcomings, conventional method is that some inorganic matters with high thermal conductivity coefficient are filled into very high content
In macromolecule matrix, increase thermal conductivity of material, while flame-retardant modified, this method is carried out to material, simple to operate, cost phase
To relatively low, it is easy to large-scale industrial production.
Patent of invention CN103725004 A with nylon resin and polyphenylene sulfide be based on resin, select graphite, carbon nanometer
Pipe, white carbon black or copper powder etc. form bicontinuous structure with polyphenylene sulfide as heat filling, nylon, and heat filling optionally divides
It is dispersed in a wherein phase, is prepared for the nylon heat-conductive composite material that mechanical property is good, heat conductivity is high;Patent of invention
CN101717579 A adopt two step extrusion moldings, make polyphenylene sulfide form bicontinuous structure with nylon, and heat filling is enriched in nylon
In, heat conduction network is formed, is prepared for that filer content is few, the high nylon/polyphenyl thioether alloy of heat conductivity;CN 104164081 A
And CN103340890 A are prepared for the nylon with bicontinuous structure/polyphenylene sulfide heat conductive flame-retarding material according to thinking like above
Material.
The heat conduction that above is referred to or heat conductive flame-retarding nylon/polyphenylene sulfide co-continuous alloy material heat filling loading are still
It is higher, cause mechanical performance relatively low, particularly notch impact strength is poor, while the data report in terms of there are no anti-flammability.
The content of the invention
The purpose of the present invention is for above-mentioned deficiency of the prior art, there is provided a kind of LED illumination is led with ultralow filling
Hot fire-retardant nylon polyphenylene oxide composite material, only need the heat filling of ultralow loading can just obtain the higher heat conductivity of material and
Good mechanical performance, while any other fire retardant need not be increased, you can reach 94 V0 flame retardant ratings of UL.
The purpose of the present invention is achieved through the following technical solutions:
A kind of high heat conductive insulating nylon/polyphenyl thioether composite material, is made up of the raw material of following weight portion:
Nylon resin 40-50 parts
Polyphenylene sulfide 40-50 parts
Toughener 3-5 parts
Compatilizer 0.5-1.5 parts
Modified Nano carborundum whisker 10-20 parts
Lubricant 0.2-0.6 parts
Antioxidant 0.2-0.6 parts
The viscosity and polyphenylene oxide of the heat conduction nylon master batch of described nylon resin, toughener and modified Nano carborundum whisker composition
Ratio of viscosities be 0.9-1.1, make nylon resin and polyphenylene sulfide be formed in situ bicontinuous structure.Described polyphenylene sulfide exists
It is tridimensional network in the material, by its natural anti-flammability, serves as fire retardant in the material system.
Further scheme, described nylon resin are at least one in PA6 or PA66.
Further scheme, described polyphenylene sulfide be different melt flow rates linear polyphenylthioether or crosslinking
At least one of type polyphenylene sulfide.
Further scheme, it is 0.87-0.89g/cm that described toughener is density3, melt under 190 DEG C/2.16Kg and refer to
Glycidyl methacrylate graft ethylene-octene copolymer of the number for 3-6g/10min.
Further scheme, the purity of the modified Nano carborundum whisker is that more than 99.8%, degree of crystallinity is more than 95%, directly
Footpath is 100 ~ 500nm, and length is 20 ~ 50um, draw ratio about 40 ~ 500.
Further scheme, described compatilizer are about 0.90 ~ 0.95 g/cm of density3Ethylene-acrylate ionomer.
Further scheme, described antioxidant is N, N'- is double-(3- (3,5- di-tert-butyl-hydroxy phenyl) propiono)
In hexamethylene diamine, tetramethylolmethane four (3- lauryl thiopropionates), three [2.4- di-tert-butyl-phenyls] phosphite antioxidant
It is at least one.
Further scheme, described lubricant are Oleic acid esters, acidifying low molecular weight polyethylene wax, tetramethylolmethane stearic acid
At least one in ester.
Beneficial effects of the present invention:
1st, raw material used in the present invention is all from commercially available, wide material sources.Heat filling addition is ultralow, and preparation method is simple,
It is workable, it is easy to large-scale industrial production, the great cost performance of product;
2nd, due in the present invention nylon resin and polyphenylene sulfide be formed in situ bicontinuous structure, modified Nano carborundum whisker is selected
It is dispersed in nylon phase to property, on the one hand, modified Nano carborundum whisker is optionally dispersed in nylon phase;On the other hand,
Silicon carbide whisker has high draw ratio, relative to spherical heat filling, oozes threshold value with lower Chongqing, therefore, only need to be lower
The addition of carborundum, you can obtain high heat conductivity and good mechanical property;Simultaneously as the natural resistance of polyphenylene sulfide
The network-like microcosmic phase morphology of combustion attribute and its three nets(Play the similar effects of anti-dripping agent PTFE)So that the nylon/polyphenyl
Thioether alloy material need not do extra flame-retardant modified, and anti-flammability can reach UL94 V0 grades;So height prepared by the present invention
Heat conductive flame-retarding nylon/polyphenylene oxide composite material brings higher heat conductivity and more added with excellent with lower loading
Mechanical performance so that product more lightweight;
3rd, the nylon heat-conductive composite material increased the electric insulating quality of the material, be met significantly due to the addition of polyphenylene sulfide
The material requirements of LED electricity-saving lamp industries.
Specific embodiment:
To be best understood from the present invention, with reference to embodiment, the present invention is described further.
Embodiment 1-3 is carried out according to following preparation method, and selects modified oxidized magnesium(Spherical heat filling, uses silane idol
Connection agent KH560 is surface-treated, particle diameter 2-20um)As heat filling, comparative example is done according to above method, its each component
Proportioning is as shown in Table 1:
(1)40-50 part nylon resins, 3-5 parts toughener are added to into mixing 2-5 minutes in homogenizer together;
(2)Mixed material is added in engagement type parallel equidirectional two-screw extruder, and in side feeding through main feeding hopper
Place adds the nanometer silicon carbide whiskers of 10-20 parts(At utmost to retain the draw ratio of whisker), Jing meltings, extrusion, pelletizing
Obtain heat conduction nylon master batch;Wherein, extruder barrel temperature 240-260 DEG C, screw speed be 300-500r/min, vacuum for-
0.04~0.1MPa;
(3)Heat conduction nylon master batch is put in the drying baker that temperature is 85 ± 5 DEG C and dries 2-4 hours, then by its polyphenylene sulfide
Resin 40-50 parts, compatilizer 0.5-1.5 parts, antioxidant 0.2-0.6 parts, lubricant 0.2-0.6 parts are added in homogenizer
Mixing 2-5 minutes;
(4)Mixed material is added in engagement type parallel equidirectional two-screw extruder, Jing meltings, extrusion, pelletizing obtain height and lead
Heat insulation nylon/polyphenyl thioether composite material;Wherein, extruder barrel temperature 260-280 DEG C, screw speed are 300-500r/
Min, vacuum are -0.04 ~ -0.1MPa.
In the present invention nanometer silicon carbide whiskers through silane coupler KH560 be surface-treated, in order to lifted its with
The affinity of PA66 resins so as to be optionally dispersed in nylon phase.
40-50 part nylon resins, 3-10 part toughener, 10-20 parts are changed into nanometer silicon carbide whiskers, 0.1- in the present invention
0.3 part of antioxidant, 0.1-0.3 parts lubricant blended Jing meltings, extrusion, pelletizing together, is obtained heat conduction nylon master batch, the nylon
The viscosity of resin is close to the viscosity and volume ratio of polyphenylene oxide for 0.9-1.1, i.e. nylon resin with the ratio of viscosities of polyphenylene sulfide
1:1, so that nylon resin is formed in situ bicontinuous structure with polyphenylene sulfide.
The composition of one raw material of table
Learnt according to scanning electron microscope test result:Nylon prepared by embodiment 1-3/polyphenylene oxide composite material forms doubly-linked
Continuous structure, and nanometer silicon carbide whiskers are optionally dispersed in nylon phase.
It is the density of nylon/polyphenyl thioether composite material prepared by above-described embodiment 1 ~ 3 and comparative example, tensile strength, curved
Bent modulus, Izod notched impact strength, heat conductivity, anti-flammability, specific insulation etc. detected, its examination criteria and property
Energy testing result is as shown in Table 2:
Two composite property index of table
Can be seen that from table two, embodiment of the present invention 1-3 prepare nylon/polyphenyl thioether composite material for comparative example,
With higher heat conductivity and mechanical performance, anti-flammability and surface resistivity, the performance that can meet electricity-saving lamp industry will
Ask.
It is above-mentioned that the preferred embodiment of the present invention is described as to embodiment.The invention is not restricted to embodiment here, this
Art personnel announcement of the invention, the improvement made without departing from scope and modification all should be in the present invention
Protection domain in.
Claims (8)
1. a kind of LED illumination fills heat conductive flame-retarding nylon polyphenylene oxide composite material with ultralow, it is characterised in that:By following weight portion
Raw material composition:
Nylon resin 40-50 parts
Polyphenylene sulfide 40-50 parts
Toughener 3-5 parts
Compatilizer 0.5-1.5 parts
Modified Nano carborundum whisker 10-20 parts
Lubricant 0.2-0.6 parts
Antioxidant 0.2-0.6 parts
The viscosity and polyphenylene oxide of the heat conduction nylon master batch of described nylon resin, toughener and modified Nano carborundum whisker composition
Ratio of viscosities be 0.9-1.1, make nylon resin and polyphenylene sulfide be formed in situ bicontinuous structure, described polyphenylene sulfide exists
It is tridimensional network in the material, by its natural anti-flammability, serves as fire retardant in the material system.
2. a kind of LED illumination according to claim 1 fills heat conductive flame-retarding nylon polyphenylene oxide composite material with ultralow, and which is special
Levy and be:Described nylon resin is at least one in PA6 or PA66.
3. a kind of LED illumination according to claim 1 fills heat conductive flame-retarding nylon polyphenylene oxide composite material with ultralow, and which is special
Levy and be:Described polyphenylene sulfide be the linear polyphenylthioether of different melt flow rates or cross-linking type polyphenylene sulfide extremely
Few one kind.
4. a kind of LED illumination according to claim 1 fills heat conductive flame-retarding nylon polyphenylene oxide composite material with ultralow, and which is special
Levy and be:It is 0.87-0.89g/cm that described toughener is density3, under 190 DEG C/2.16Kg melt index be 3-6g/
The glycidyl methacrylate graft ethylene-octene copolymer of 10min.
5. a kind of LED illumination according to claim 1 fills heat conductive flame-retarding nylon polyphenylene oxide composite material with ultralow, and which is special
Levy and be:The purity of the modified Nano carborundum whisker be more than 99.8%, degree of crystallinity be more than 95%, a diameter of 100 ~
500nm, length is 20 ~ 50um, draw ratio about 40 ~ 500.
6. a kind of LED illumination according to claim 1 fills heat conductive flame-retarding nylon polyphenylene oxide composite material with ultralow, and which is special
Levy and be:Described compatilizer is about 0.90 ~ 0.95 g/cm of density3Ethylene-acrylate ionomer.
7. a kind of LED illumination according to claim 1 fills heat conductive flame-retarding nylon polyphenylene oxide composite material with ultralow, and which is special
Levy and be:Described antioxidant is N, N'- is double-(3- (3,5- di-tert-butyl-hydroxy phenyls) propiono) hexamethylene diamine, Ji Wusi
At least one in alcohol four (3- lauryl thiopropionates), three [2.4- di-tert-butyl-phenyls] phosphite antioxidant.
8. a kind of LED illumination according to claim 1 fills heat conductive flame-retarding nylon polyphenylene oxide composite material with ultralow, and which is special
Levy and be:Described lubricant be Oleic acid esters, acidifying low molecular weight polyethylene wax, in pentaerythritol stearate at least one
Kind.
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CN110483995A (en) * | 2019-09-05 | 2019-11-22 | 安徽省聚科石墨烯科技股份公司 | A kind of graphene heat-conducting plastic and preparation method thereof |
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CN110483995A (en) * | 2019-09-05 | 2019-11-22 | 安徽省聚科石墨烯科技股份公司 | A kind of graphene heat-conducting plastic and preparation method thereof |
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