CN103895297A - Flame-retardant aluminum-plastic composite sheet and preparation method thereof - Google Patents
Flame-retardant aluminum-plastic composite sheet and preparation method thereof Download PDFInfo
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- CN103895297A CN103895297A CN201410072774.5A CN201410072774A CN103895297A CN 103895297 A CN103895297 A CN 103895297A CN 201410072774 A CN201410072774 A CN 201410072774A CN 103895297 A CN103895297 A CN 103895297A
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Abstract
The invention provides a flame-retardant aluminum-plastic composite sheet. The flame-retardant aluminum-plastic composite sheet is prepared through an aluminum film, an adhesive and a polystyrene composite sheet. The flame-retardant aluminum-plastic composite sheet is prepared by a method comprising the following steps: coating the adhesive on the aluminum film by rolling under vacuum; then performing rolling, thermal compounding and cold roll calendering on the treated aluminum film and the polystyrene composite sheet under temperature of 95 to 105 DEG C to obtain the flame-retardant aluminum-plastic composite sheet. The flame-retardant aluminum-plastic composite sheet is prepared by smelting, blending and extruding the following raw materials in parts by weight: 40 to 60 parts of polystyrene, 17 to 26 parts of ammonium polyphosphate, 5 to 10 parts of cellulose, 6 to 8 parts of modified montmorillonite and 12 to 16 parts of polyphenyl ether. The flame-retardant aluminum-plastic composite sheet is outstanding and permanent in flame retardant performance, mechanical property, barrier property, and weather resistance; in addition, the preparation method is simple, and industrial production can be carried out easily.
Description
(1) technical field
The present invention relates to field of compound material, be specifically related to a kind of flame-retardant aluminum plastic composite sheet and preparation method thereof.
(2) background technology
Plastic-aluminum combined sheet material be taking synthesized polymer material as sandwich layer, aluminium film is the multilayer materials of finish coat.Plastic-aluminum combined sheet material, with light weight environmental protection, fashion attractive in appearance, easy construction and high weather-proof, high-barrier, the feature such as clean, is widely used in the fields such as building curtain wall, advertising board, indoor and outdoor decoration, car and boat decoration, Furniture manufacture.Plastic-aluminum combined sheet material is more economical with respect to fine aluminium sheet material, more environmental protection, meets the requirement of developing a circular economy with low-carbon economy.But plastic-aluminum combined sheet material core material generally uses the inflammable material such as polystyrene, polyethylene, this has buried hidden danger for breaking out of fire.For ensureing the safety in utilization of plastic-aluminum combined sheet material in the field such as building product, decorating and renovating material, further promote applying of this series products, need the fire resistance of increase and improving product.
Solve the inflammable problem of plastic-aluminum combined sheet material mainly by adding fire retardant to realize in base material.Conventional fire retardant has: (a) halogen flame, this based flame retardant is brought into play fire retardation with gas phase, but halogen flame can produce a large amount of poisonous mordant smog (comprising hydrogen halides, dioxin) in the time of burning, easily cause secondary pollution, do not reach the requirement of environment-friendly building materials, therefore should not be elected to be the fire retardant of the aluminium plastic composite material base material with fire prevention, environment-friendly function.(b) phosphor nitrogen combustion inhibitor, this based flame retardant suppresses material combustion by the fire-retardant pattern of condensed phase.Its condensed phase is mainly porous foam charcoal layer, can effectively isolate spreading of oxygen and heat, stop material further to burn, but the charcoal layer structural strength that separately uses phosphor nitrogen combustion inhibitor to form is inadequate, while formation on large area sheet material, easily caves in and again expose ignition source.(c) metal hydroxide combustion inhibitor, the dehydration of absorbing heat in the time of high temperature of this based flame retardant, can take away the heat that burning produces, reduce burning velocity, prevent propagation of flame, reach the object that suppresses burning, and do not produce thick smoke and toxic gas, can not cause secondary pollution to environment, now the core of the existing flame-retardant aluminum plastic composite (as 4mm heavy-gauge sheeting) as thicker size.At present, there are German Alucobond, Mitsubishi Alpolic, U.S. Reynolds etc. in the overseas enterprise that adopts this class scheme to manufacture flame-retardant aluminum plastic composite, there are the outstanding thing outstanding person in Hefei, the refined auspicious science and technology in Shanghai, Hunan plastic institute etc. in domestic enterprise, and Patents has CN102108145A, CN101475716B, CN1817813 etc.For reaching good flame retardant effect, the addition of the mineral-type such as metal hydroxides and Firebrake ZB synergist in aluminium plastic composite material core is large, and (common metal hydroxide weight portion is 60～80%, mineral-type synergist weight portion is 2～10%), cause that material hardness is large and fragility is large, the composite type of plasticity variation and manufacture, taking thicker sheet material as main, cannot be made slim flame-retardant aluminum plastic composite sheet (thickness 0.5～0.8mm).Therefore, be necessary that a kind of eco-friendly ultrathin flame-retardant aluminum plastic composite sheet of exploitation and preparation method thereof, to widen the application of aluminium plastic composite material by introducing new material, new technology.
(3) summary of the invention
The invention provides a kind of flame-retardant aluminum plastic composite sheet, it has good lasting fire resistance, mechanical property, barrier property and weather resistance.
The present invention also provides a kind of preparation method of flame-retardant aluminum plastic composite sheet, and this preparation method is simple to operate, is suitable for suitability for industrialized production.
The present invention adopts following technical scheme:
A kind of flame-retardant aluminum plastic composite sheet, described flame-retardant aluminum plastic composite sheet is made up of aluminium film, organic silicon adhesive and polystyrene-based composite sheet, described aluminium film is coated with organic silicon adhesive through vacuum furnace, delay with compound, the cold roll-in of roll-in heat under 95～105 DEG C of conditions of polystyrene-based composite sheet again, make flame-retardant aluminum plastic composite sheet; Described polystyrene-based composite sheet is made by the raw materials melt blending extrusion of following weight portion: 40～60 parts of polystyrene, 17～26 parts of APPs, 5～10 parts of celluloses, 6～8 parts of modified montmorillonoids and 12～16 parts of polyphenylene oxide; Described modified montmorillonoid is alkyl trimethyl quaternary ammonium salt modified montmorillonoid, and the molecular structural formula of described alkyl trimethyl quaternary ammonium salt is CH
3(CH
2)
nn (CH
3)
3 +x
-, wherein, n=17～25, X is Cl or Br; Preferably described modified montmorillonoid is Cetyltrimethylammonium bromide modified montmorillonoid; The particle diameter of described modified montmorillonoid is 15～25um.
Organic silicon adhesive of the present invention, its main component is dimethyl silicone polymer, and described organic silicon adhesive stirs mixing making by raw material constant temperature at 25～40 DEG C of following weight portion: 70～80 parts of hydroxyl endblocked polydimethylsiloxanes, 6～10 parts of alkyl-blocked dimethyl silicone polymers, 1～2 part of dimethyl-penten diamines, 0.5～2 part of organotin catalysts and 6～22.5 parts of aerosils; Wherein, described organotin catalysts is selected from a kind of in dibutyltin diacetate, dibutyl tin laurate, stannous octoate or any two kinds of mixtures with arbitrary proportion wherein.
The source of modified montmorillonoid of the present invention is NANOCOR company of the U.S., and product type is for I.28E.
The preferred pure aluminum foil of aluminium film of the present invention, thickness is 0.01～0.02mm; The thickness of described flame-retardant aluminum plastic composite sheet is 0.50～0.80mm.
Further, in the raw material of polystyrene-based composite sheet of the present invention, the degree of polymerization of described APP is 1000～1500, and phosphorus content is 31～32%, and particle diameter is 15～18um, if the degree of polymerization is too small, basic thermal stability declines; The degree of polymerization is excessive, and the initial heat decomposition temperature that material is met after fire raises, and is unfavorable for promoting in time material dehydration carbonization; Recommending the described cellulosic degree of polymerization is 2000～5000, and particle diameter is 15～25um, mainly becomes carbon synergist, and the degree of polymerization is too small, and its thermal stability declines; The degree of polymerization is excessive, and the Smelting Effect of itself and polystyrene resin declines; Described polyphenylene oxide is Powdered, and its glass transition temperature is 214 DEG C.
Further, described flame-retardant aluminum plastic composite sheet, the spread of described organic silicon adhesive is 30～75g/m
2aluminium film.
Further again, in flame-retardant aluminum plastic composite sheet, in the raw material of described organic silicon adhesive, the mean molecule quantity of described hydroxyl endblocked polydimethylsiloxane and described alkyl-blocked dimethyl silicone polymer is 1000～1500(1～15Pas, 25 DEG C); Molecular weight is too small, and the organic silicon adhesive of formation declines to the adhesive property of aluminium film and polystyrene-based composite sheet; Molecular weight is excessive, and the viscosity of organic silicon adhesive is excessive, by roll coating model, aluminium film gluing difficulty is strengthened, and is prone to the excessive or uneven problem of gluing.
Concrete, the preparation method of flame-retardant aluminum plastic composite sheet of the present invention, comprises the steps:
(1) modified montmorillonoid and polyphenylene oxide melting mixing extruding pelletization are obtained to imvite master batch, imvite master batch, polystyrene, APP, cellulose at 60 DEG C～70 DEG C premixs, after mixing through equidirectional parallel double-screw extruder melt blending extrude, roll, traction, cooling forming, make polystyrene-based composite sheet;
(2) hydroxyl endblocked polydimethylsiloxane, alkyl-blocked dimethyl silicone polymer, dimethyl-penten diamines, organotin catalysts and aerosil are added to glue cylinder, first glue cylinder is vacuumized, at 25～40 DEG C, constant temperature stirs mixing 20～30min again, makes organic silicon adhesive.
(3) aluminium film is pressed spread 30～75g/m through vacuum furnace
2aluminium film is coated with after gluing, delays with compound, the cold roll-in of roll-in heat under 95～105 DEG C of conditions of polystyrene-based composite sheet, makes flame-retardant aluminum plastic composite sheet.
When concrete operations, can select the conventional high-speed mixer in this area (the general speed of mainshaft is 300r/min) to carry out mixed material, each time of mixing is generally 10～20min can make mixing of materials even.
Modified montmorillonoid and polyphenylene oxide melting mixing extruding pelletization are prepared imvite master batch, the temperature of melt zone can be controlled to 250～260 DEG C; While making polystyrene-based composite sheet, the temperature of melt zone can be controlled to 230～240 DEG C.
Tool of the present invention has the following advantages:
Flame-retardant aluminum plastic composite sheet of the present invention has good lasting fire resistance, mechanical property, barrier property and weather resistance.
Preparation method of the present invention adopts polyphenylene oxide to carry out melting mixing to modified montmorillonoid and dials layer and process, by imvite master batch after treatment and polystyrene, APP, the compound flame-retardant aluminum plastic composite sheet of preparing of cellulose melting, simple to operate, is suitable for suitability for industrialized production.
(4) brief description of the drawings
Fig. 1 is flame-retardant system structural design schematic diagram;
In figure: 1-aluminium foil, 2-organosilicon adhesive layer, 3-inflaming retarding core material.
(5) detailed description of the invention
Below by specific embodiment, the present invention is further described, but protection scope of the present invention is not limited to this.
By 1.6kg polyphenylene oxide (Asahi Chemical Industry of S201A/ Japan) and 0.8kg Cetyltrimethylammonium bromide modified montmorillonoid (NANOCOR company of the U.S., I.28E) (speed of mainshaft 300r/min) premix 10min in high-speed mixer of elder generation, premix temperature is 70 DEG C, again through parallel equidirectional two-screw extruder melt blending extruding pelletization, make imvite master batch, 250～260 DEG C of melt zone temperature.2.4kg imvite master batch and 4.0kg polystyrene (1300/ LG-DOW), 2.6kg APP, 1.0kg cellulose (speed of mainshaft 300r/min) premix 10min in high-speed mixer, premix temperature is 70 DEG C, again through parallel equidirectional two-screw extruder melt blending extrude, roll, traction, cooling forming, make polystyrene-based composite sheet, melt zone temperature is controlled at 230～240 DEG C, and calendering heat roller temperature is controlled at 125～180 DEG C.
8.0kg hydroxyl endblocked polydimethylsiloxane, the alkyl-blocked dimethyl silicone polymer of 1.0kg, 0.1kg dimethyl-penten diamines, 0.2kg dibutyltin diacetate, 0.7kg aerosil are added to glue cylinder, first glue cylinder is vacuumized, constant temperature (32～40 DEG C) stirs mixingly again, makes organic silicon adhesive.
Aluminium film is coated with gluing (spread 35g/m through vacuum furnace
2), delay with polystyrene-based composite sheet roll-in heat compound (95～105 DEG C of heat roller temperatures), cold roll-in, make flame-retardant aluminum plastic composite sheet.
Embodiment 2
By 1.2kg polyphenylene oxide (Asahi Chemical Industry of S201A/ Japan) and 0.6kg Cetyltrimethylammonium bromide modified montmorillonoid (NANOCOR company of the U.S., I.28E) (speed of mainshaft 300r/min) premix 10min in high-speed mixer of elder generation, premix temperature is 70 DEG C, again through parallel equidirectional two-screw extruder melt blending extruding pelletization, make imvite master batch, 250～260 DEG C of melt zone temperature.1.8kg imvite master batch and 6.0kg polystyrene (1300/ LG-DOW), 1.7kg APP, 0.5kg cellulose (speed of mainshaft 300r/min) premix 10min in high-speed mixer, premix temperature is 70 DEG C, again through parallel equidirectional two-screw extruder melt blending extrude, roll, traction, cooling forming, make polystyrene-based composite sheet, melt zone temperature is controlled at 230～240 DEG C, and calendering heat roller temperature is controlled at 125～180 DEG C.
8.0kg hydroxyl endblocked polydimethylsiloxane, the alkyl-blocked dimethyl silicone polymer of 1.0kg, 0.1kg dimethyl-penten diamines, 0.2kg dibutyltin diacetate, 0.7kg aerosil are added to glue cylinder, first glue cylinder is vacuumized, constant temperature (32～40 DEG C) stirs mixingly again, makes organic silicon adhesive.
Aluminium film is coated with gluing (spread 35g/m through vacuum furnace
2), delay with polystyrene-based composite sheet roll-in heat compound (95～105 DEG C of heat roller temperatures), cold roll-in, make flame-retardant aluminum plastic composite sheet.
By 1.5kg polyphenylene oxide (Asahi Chemical Industry of S201A/ Japan) and 0.7kg Cetyltrimethylammonium bromide modified montmorillonoid (NANOCOR company of the U.S., I.28E) (speed of mainshaft 300r/min) premix 10min in high-speed mixer of elder generation, premix temperature is 70 DEG C, again through parallel equidirectional two-screw extruder melt blending extruding pelletization, make imvite master batch, 250～260 DEG C of melt zone temperature.2.2kg imvite master batch and 5.0kg polystyrene (1300/ LG-DOW), 2.0kg APP, 0.8kg cellulose (speed of mainshaft 300r/min) premix 10min in high-speed mixer, premix temperature is 70 DEG C, again through parallel equidirectional two-screw extruder melt blending extrude, roll, traction, cooling forming, make polystyrene-based composite sheet, melt zone temperature is controlled at 230～240 DEG C, and calendering heat roller temperature is controlled at 125～180 DEG C.
8.0kg hydroxyl endblocked polydimethylsiloxane, the alkyl-blocked dimethyl silicone polymer of 1.0kg, 0.1kg dimethyl-penten diamines, 0.2kg dibutyltin diacetate, 0.7kg aerosil are added to glue cylinder, first glue cylinder is vacuumized, constant temperature (32～40 DEG C) stirs mixingly again, makes organic silicon adhesive.
Aluminium film is coated with gluing (spread 35g/m through vacuum furnace
2), delay with polystyrene-based composite sheet roll-in heat compound (95～105 DEG C of heat roller temperatures), cold roll-in, make flame-retardant aluminum plastic composite sheet.
Embodiment 4
By 1.5kg polyphenylene oxide (Asahi Chemical Industry of S201A/ Japan) and 0.7kg Cetyltrimethylammonium bromide modified montmorillonoid (NANOCOR company of the U.S., I.28E) (speed of mainshaft 300r/min) premix 10min in high-speed mixer of elder generation, premix temperature is 70 DEG C, again through parallel equidirectional two-screw extruder melt blending extruding pelletization, make imvite master batch, 250～260 DEG C of melt zone temperature.2.2kg imvite master batch and 5.0kg polystyrene (1300/ LG-DOW), 2.0kg APP, 0.8kg cellulose (speed of mainshaft 300r/min) premix 10min in high-speed mixer, premix temperature is 70 DEG C, again through parallel equidirectional two-screw extruder melt blending extrude, roll, traction, cooling forming, make polystyrene-based composite sheet, melt zone temperature is controlled at 230～240 DEG C, and calendering heat roller temperature is controlled at 125～180 DEG C.
8.0kg hydroxyl endblocked polydimethylsiloxane, the alkyl-blocked dimethyl silicone polymer of 1.0kg, 0.1kg dimethyl-penten diamines, 0.15kg dibutyl tin laurate, 0.05kg stannous octoate, 0.7kg aerosil are added to glue cylinder, first glue cylinder is vacuumized, constant temperature (32～40 DEG C) stirs mixingly again, makes organic silicon adhesive.
Aluminium film is coated with gluing (spread 75g/m through vacuum furnace
2), delay with polystyrene-based composite sheet roll-in heat compound (95～105 DEG C of heat roller temperatures), cold roll-in, make flame-retardant aluminum plastic composite sheet.
Embodiment 5
By 1.5kg polyphenylene oxide (Asahi Chemical Industry of S201A/ Japan) and 0.7kg Cetyltrimethylammonium bromide modified montmorillonoid (NANOCOR company of the U.S., I.28E) (speed of mainshaft 300r/min) premix 10min in high-speed mixer of elder generation, premix temperature is 70 DEG C, again through parallel equidirectional two-screw extruder melt blending extruding pelletization, make imvite master batch, 250～260 DEG C of melt zone temperature.2.2kg imvite master batch and 5.0kg polystyrene (1300/ LG-DOW), 2.0kg APP, 0.8kg cellulose (speed of mainshaft 300r/min) premix 10min in high-speed mixer, premix temperature is 70 DEG C, again through parallel equidirectional two-screw extruder melt blending extrude, roll, traction, cooling forming, make polystyrene-based composite sheet, melt zone temperature is controlled at 230～240 DEG C, and calendering heat roller temperature is controlled at 125～180 DEG C.
7.0kg hydroxyl endblocked polydimethylsiloxane, the alkyl-blocked dimethyl silicone polymer of 0.6kg, 0.1kg dimethyl-penten diamines, 0.05kg dibutyl tin laurate, 2.25kg aerosil are added to glue cylinder, first glue cylinder is vacuumized, constant temperature (32～40 DEG C) stirs mixingly again, makes organic silicon adhesive.
Aluminium film is coated with gluing (spread 35g/m through vacuum furnace
2), delay with polystyrene-based composite sheet roll-in heat compound (95～105 DEG C of heat roller temperatures), cold roll-in, make flame-retardant aluminum plastic composite sheet.
Embodiment 6
By 1.5kg polyphenylene oxide (Asahi Chemical Industry of S201A/ Japan) and 0.7kg Cetyltrimethylammonium bromide modified montmorillonoid (NANOCOR company of the U.S., I.28E) (speed of mainshaft 300r/min) premix 10min in high-speed mixer of elder generation, premix temperature is 70 DEG C, again through parallel equidirectional two-screw extruder melt blending extruding pelletization, make imvite master batch, 250～260 DEG C of melt zone temperature.2.2kg imvite master batch and 5.0kg polystyrene (1300/ LG-DOW), 2.0kg APP, 0.8kg cellulose (speed of mainshaft 300r/min) premix 10min in high-speed mixer, premix temperature is 70 DEG C, again through parallel equidirectional two-screw extruder melt blending extrude, roll, traction, cooling forming, make polystyrene-based composite sheet, melt zone temperature is controlled at 230～240 DEG C, and calendering heat roller temperature is controlled at 125～180 DEG C.
7.0kg hydroxyl endblocked polydimethylsiloxane, the alkyl-blocked dimethyl silicone polymer of 0.6kg, 0.1kg dimethyl-penten diamines, 0.05kg dibutyl tin laurate, 2.25kg aerosil are added to glue cylinder, first glue cylinder is vacuumized, constant temperature (32～40 DEG C) stirs mixingly again, makes organic silicon adhesive.
Aluminium film is coated with gluing (spread 75g/m through vacuum furnace
2), delay with polystyrene-based composite sheet roll-in heat compound (95～105 DEG C of heat roller temperatures), cold roll-in, make flame-retardant aluminum plastic composite sheet.
Comparative example 1:
1.5kg polyphenylene oxide (Asahi Chemical Industry of S201A/ Japan), 2.0kg DTAB modified montmorillonoid, 5.0kg polystyrene (1300/ LG-DOW), 1.5kg APP (speed of mainshaft 300r/min) premix 10min in high-speed mixer, premix temperature is 70 DEG C, again through parallel equidirectional two-screw extruder melt blending extrude, roll, traction, cooling forming, make polystyrene-based composite sheet, melt zone temperature is controlled at 245～255 DEG C, and calendering heat roller temperature is controlled at 125～180 DEG C.
Aluminium film is coated with gluing (polyvinyl acetate glue stick, spread 75g/m through vacuum furnace
2), delay with polystyrene-based composite sheet roll-in heat compound (95～105 DEG C of heat roller temperatures), cold roll-in, make flame-retardant aluminum plastic composite sheet.
Flame-retardant aluminum plastic composite sheet prepared by embodiment 1～6 and comparative example 1 carries out performance test, examination criteria: hot strength is tested according to GB/T1040-2006 " mensuration of plastic tensile performance "; Oxygen index (OI) is tested according to " plastics are measured burning behavior with oxygen index method "; Horizontal firing residual length is according to GB/T2408-2008 " mensuration Using Horizontal Bridgman Method and the normal beam technique of Plastics Combustion performance " test, and test result is as follows:
| ? | Hot strength (MPa) | Oxygen index (OI) (%) | Horizontal firing residual length (cm) |
| Comparative example 1 | 24.2 | 28 | 15 |
| |
18.6 | 36 | 66 |
| Embodiment 2 | 23.2 | 31 | 47 |
| |
22.3 | 33 | 58 |
| Embodiment 4 | 22.8 | 35 | 68 |
| Embodiment 5 | 21.8 | 35 | 70 |
| Embodiment 6 | 21.0 | 37 | 73 |
Note: test samples thickness is 0.6mm
Result is carried out to simple analysis once: from table, (1) increase of polyphenylene oxide and organo montmorillonite content in composite, be conducive to promote the fire resistance (oxygen index (OI) rising, horizontal firing residual length increase) of material, but be unfavorable for keeping the mechanical property (hot strength decline) of material; (2) flame retardance element in organic silicon adhesive and base material is conducive to the collaborative fire resistance that promotes composite, and generally speaking, resin added is larger, and oxygen index (OI) and horizontal firing residual length all increase to some extent; (3) in organic silicon adhesive, the minimizing of the relative amount of adhesion component hydroxyl endblocked polydimethylsiloxane, the alkyl-blocked dimethyl silicone polymer of crosslinking agent can weaken the mechanical property of composite, although its fire resistance has lifting (this mainly comes from the increase of aerosil relative amount in adhesive).Therefore, embodiment 4 has the best proportioning after optimization, can give the good fire resistance of composite and mechanical property.
For the sandwich construction feature of plastic-aluminum combined sheet material, through flame-retardant system structural design (as Fig. 1), intend working in coordination with by two aspects the fire resistance that strengthens composite sheet.
(a) the first fire-retardant use polyphenylene oxide of p-poly-phenyl ethene core, organophosphorus compounds (APP), charcoal source material (cellulose) and modified montmorillonoid, organophosphorus ester thermal decomposition at a certain temperature produces phosphoric acid, the collaborative charcoal of phosphoric acid source material impels top layer polystyrene material to be dehydrated into charcoal, charcoal layer can effectively be isolated spreading of oxygen and heat, and protection primer stops it further to burn; Modified montmorillonoid is uniformly distributed in inflaming retarding core material after surface modification treatment, when making system, burning reaches after uniform temperature, modified montmorillonoid is by polyphenylene oxide pyrolysis product and the charcoal layer formation cross-linked network that mutually bonds, this structure can effectively strengthen the intensity of large area charcoal layer, prevents from that charcoal layer structure from caving in to cause primer to be exposed in air and resume combustion occurs.
(b) secondly; apply one deck organosilicon polymer adhesive protective layer on inflaming retarding core material surface; in polysiloxanes combustion process, form continuous, oxidation resistant silicate protective layer on above-mentioned charcoal layer surface on the one hand; the compactness and the barrier that promote charcoal layer, further suppress diffusion and the heat radiation of oxygen.Polysiloxanes also has the fire-retardant mechanism of gas phase on the other hand, in combustion process, polysiloxanes decomposition exists with the intermediate form of silicic acid and esters of silicon acis, and they can eliminate the peroxy that polystyrene produces in oxicracking, and the oxicracking of polymer is played to inhibitory action.
Claims (10)
1. a flame-retardant aluminum plastic composite sheet, flame-retardant aluminum plastic composite sheet described in it is characterized in that is made up of aluminium film, organic silicon adhesive and polystyrene-based composite sheet, described aluminium film is coated with organic silicon adhesive through vacuum furnace, delay with compound, the cold roll-in of roll-in heat under 95～105 DEG C of conditions of polystyrene-based composite sheet again, make flame-retardant aluminum plastic composite sheet; Described polystyrene-based composite sheet is made by the raw materials melt blending extrusion of following weight portion: 40～60 parts of polystyrene, 17～26 parts of APPs, 5～10 parts of celluloses, 6～8 parts of modified montmorillonoids and 12～16 parts of polyphenylene oxide; Described modified montmorillonoid is alkyl trimethyl quaternary ammonium salt modified montmorillonoid, and the molecular structural formula of described alkyl trimethyl quaternary ammonium salt is CH
3(CH
2)
nn (CH
3)
3 +x
-, wherein, n=17～25, X is Cl or Br; The particle diameter of described modified montmorillonoid is 15～25um.
2. flame-retardant aluminum plastic composite sheet as claimed in claim 1, is characterized in that described organic silicon adhesive stirs mixing making by raw material constant temperature at 25～40 DEG C of following weight portion: 70～80 parts of hydroxyl endblocked polydimethylsiloxanes, 6～10 parts of alkyl-blocked dimethyl silicone polymers, 1～2 part of dimethyl-penten diamines, 0.5～2 part of organotin catalysts and 6～22.5 parts of aerosils; Wherein, described organotin catalysts is selected from a kind of in dibutyltin diacetate, dibutyl tin laurate, stannous octoate or any two kinds of mixtures with arbitrary proportion wherein.
3. flame-retardant aluminum plastic composite sheet as claimed in claim 1, the source that it is characterized in that described modified montmorillonoid is NANOCOR company of the U.S., product type is for I.28E.
4. flame-retardant aluminum plastic composite sheet as claimed in claim 1, is characterized in that described aluminium film is pure aluminum foil, and thickness is 0.01～0.02mm; The thickness of described flame-retardant aluminum plastic composite sheet is 0.50～0.80mm.
5. flame-retardant aluminum plastic composite sheet as claimed in claim 1, is characterized in that in the raw material of described polystyrene-based composite sheet, the degree of polymerization of described APP is 1000～1500, and phosphorus content is 31～32%, and particle diameter is 15～18um.
6. flame-retardant aluminum plastic composite sheet as claimed in claim 1, is characterized in that in the raw material of described polystyrene-based composite sheet, the described cellulosic degree of polymerization is 2000～5000, and particle diameter is 15～25um.
7. flame-retardant aluminum plastic composite sheet as claimed in claim 1, is characterized in that in the raw material of described polystyrene-based composite sheet, described polyphenylene oxide is Powdered, and its glass transition temperature is 214 DEG C.
8. flame-retardant aluminum plastic composite sheet as claimed in claim 1, is characterized in that described flame-retardant aluminum plastic composite sheet, and the spread of described organic silicon adhesive is 30～75g/m
2aluminium film.
9. flame-retardant aluminum plastic composite sheet as claimed in claim 2, is characterized in that in the raw material of described organic silicon adhesive, the mean molecule quantity of described hydroxyl endblocked polydimethylsiloxane is 1000～1500; The mean molecule quantity of described alkyl-blocked dimethyl silicone polymer is 1000～1500.
10. the preparation method of flame-retardant aluminum plastic composite sheet as claimed in claim 2, is characterized in that described preparation method comprises the steps:
(1) modified montmorillonoid and polyphenylene oxide melting mixing extruding pelletization are obtained to imvite master batch, imvite master batch, polystyrene, APP, cellulose at 60 DEG C～70 DEG C premixs, after mixing through equidirectional parallel double-screw extruder melt blending extrude, roll, traction, cooling forming, make polystyrene-based composite sheet;
(2) hydroxyl endblocked polydimethylsiloxane, alkyl-blocked dimethyl silicone polymer, dimethyl-penten diamines, organotin catalysts and aerosil are added to glue cylinder, first glue cylinder is vacuumized, at 25～40 DEG C, constant temperature stirs mixing 20～30min again, makes organic silicon adhesive.
(3) aluminium film is pressed spread 30～75g/m through vacuum furnace
2aluminium film is coated with after gluing, delays with compound, the cold roll-in of roll-in heat under 95～105 DEG C of conditions of polystyrene-based composite sheet, makes flame-retardant aluminum plastic composite sheet.
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| CN201410072774.5A Active CN103895297B (en) | 2014-02-28 | 2014-02-28 | A kind of flame-retardant aluminum plastic composite sheet and preparation method thereof |
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| CN201249621Y (en) * | 2008-06-18 | 2009-06-03 | 盛奇龙 | Colorful aluminum-plastic composite embossed film |
| CN102492231A (en) * | 2011-12-02 | 2012-06-13 | 太原理工大学 | Halogen-free flame-retarding polystyrene composite material and preparation method thereof |
| CN103333423A (en) * | 2013-06-15 | 2013-10-02 | 太原理工大学 | Compound flame-retardant polystyrene composition and preparation method thereof |
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| CN201249621Y (en) * | 2008-06-18 | 2009-06-03 | 盛奇龙 | Colorful aluminum-plastic composite embossed film |
| CN102492231A (en) * | 2011-12-02 | 2012-06-13 | 太原理工大学 | Halogen-free flame-retarding polystyrene composite material and preparation method thereof |
| CN103333423A (en) * | 2013-06-15 | 2013-10-02 | 太原理工大学 | Compound flame-retardant polystyrene composition and preparation method thereof |
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| CN103895297B (en) | 2016-04-20 |
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