CN103895297B - A kind of flame-retardant aluminum plastic composite sheet and preparation method thereof - Google Patents

A kind of flame-retardant aluminum plastic composite sheet and preparation method thereof Download PDF

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CN103895297B
CN103895297B CN201410072774.5A CN201410072774A CN103895297B CN 103895297 B CN103895297 B CN 103895297B CN 201410072774 A CN201410072774 A CN 201410072774A CN 103895297 B CN103895297 B CN 103895297B
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composite sheet
flame
aluminum plastic
polystyrene
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CN103895297A (en
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周佳红
周箭
高汉卿
吴越
武府鹏
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Hangzhou Normal University
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Abstract

The invention provides a kind of flame-retardant aluminum plastic composite sheet, be made up of aluminium film, adhesive and polystyrene-based composite sheet, described aluminium film is through vacuum furnace coating adhesive, under 95 ~ 105 DEG C of conditions, the hot compound of roll-in, cold roll-in are delayed with polystyrene-based composite sheet again, obtained 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; Flame-retardant aluminum plastic composite sheet of the present invention has excellent lasting fire resistance, mechanical property, barrier property and weather resistance, and preparation method is simple, is suitable for suitability for industrialized production.

Description

A kind of flame-retardant aluminum plastic composite sheet and preparation method thereof
(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
The multilayer materials that plastic-aluminum combined sheet material is take synthesized polymer material as sandwich layer, aluminium film is finish coat.Plastic-aluminum combined sheet material, with light weight environmental protection, fashion attractive in appearance, easy construction and high durable, 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 relative 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 materials such as inflammable 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, promoting applying of this series products further, the fire resistance with improving product need be increased.
Solve the inflammable problem of plastic-aluminum combined sheet material mainly through adding fire retardant in the substrate to realize.Conventional fire retardant has: (a) halogen flame, this based flame retardant plays fire retardation with gas phase, but halogen flame can produce a large amount of poisonous mordant smog (comprising hydrogen halides, dioxin) when burning, easily cause secondary pollution, do not reach the requirement of environment-friendly building materials, therefore the fire retardant of aluminium plastic composite material base material with fire prevention, environment-friendly function should not be elected to be.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 layer of charcoal, effectively can isolate spreading of oxygen and heat, stop material to burn further, but be used alone the Char Residues Structure insufficient strength of phosphor nitrogen combustion inhibitor formation, easily cave in when large area sheet material is formed and again expose burning things which may cause a fire disaster.(c) metal hydroxide combustion inhibitor, this based flame retardant absorbs heat when high temperature dehydration, the heat that burning produces can be taken away, reduce burning velocity, prevent propagation of flame, reach the object suppressing burning, and do not produce thick smoke and toxic gas, secondary pollution can not be caused, now the existing core being used as the flame-retardant aluminum plastic composite (as 4mm heavy-gauge sheeting) of thicker size to environment.At present, there are German Alucobond, Mitsubishi Alpolic, U.S. Reynolds etc. in the overseas enterprise adopting this kind of 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 material hardness large and fragility is large, plasticity be deteriorated and manufacture composite type based on thicker sheet material, slim flame-retardant aluminum plastic composite sheet (thickness 0.5 ~ 0.8mm) cannot be made.Therefore, it may be necessary and introduce new material, new technology, 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.
(3) summary of the invention
The invention provides a kind of flame-retardant aluminum plastic composite sheet, it has excellent lasting fire resistance, mechanical property, barrier property and weather resistance.
Present invention also offers a kind of preparation method of flame-retardant aluminum plastic composite sheet, 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, under 95 ~ 105 DEG C of conditions, the hot compound of roll-in, cold roll-in are delayed with polystyrene-based composite sheet again, obtained 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 be selected from a kind of in dibutyltin diacetate, dibutyl tin laurate, stannous octoate or wherein any two kinds with the mixture of arbitrary proportion.
The source of modified montmorillonoid of the present invention is NANOCOR company of the U.S., and I.28E product type is.
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 after fire met by material raises, and is unfavorable for promoting material dehydration carbonization in time; The cellulosic degree of polymerization described in recommendation is 2000 ~ 5000, and particle diameter is 15 ~ 25um, main one-tenth 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 adhesive property of organic silicon adhesive to aluminium film and polystyrene-based composite sheet of formation declines; Molecular weight is excessive, and the viscosity of organic silicon adhesive is excessive, is strengthened, easily occur the problem that gluing is excessive or uneven by roll coating model to aluminium film gluing difficulty.
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 imvite master batch, imvite master batch, polystyrene, APP, cellulose at 60 DEG C ~ 70 DEG C premixs, extrude through equidirectional parallel double-screw extruder melt blending after mixing, roll, draw, cooling forming, obtained polystyrene-based composite sheet;
(2) hydroxyl endblocked polydimethylsiloxane, alkyl-blocked dimethyl silicone polymer, dimethyl-penten diamines, organotin catalysts and aerosil are added glue cylinder, first glue cylinder is vacuumized, at 25 ~ 40 DEG C, constant temperature stirs mixing 20 ~ 30min again, obtained organic silicon adhesive.
(3) aluminium film presses spread 30 ~ 75g/m through vacuum furnace 2aluminium film is delayed with polystyrene-based the composite sheet hot compound of roll-in, cold roll-in under 95 ~ 105 DEG C of conditions after being coated with gluing, obtained flame-retardant aluminum plastic composite sheet.
During concrete operations, the conventional high-speed mixer (the general speed of mainshaft is 300r/min) in this area can be selected to carry out mixed material, the time of each mixing is generally 10 ~ 20min can make mixing of materials even.
Modified montmorillonoid and polyphenylene oxide melting mixing extruding pelletization prepare imvite master batch, can control at 250 ~ 260 DEG C by the temperature of melt zone; During obtained polystyrene-based composite sheet, the temperature of melt zone can be controlled at 230 ~ 240 DEG C.
Tool of the present invention has the following advantages:
Flame-retardant aluminum plastic composite sheet of the present invention has excellent 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 process, and the imvite master batch after process and polystyrene, APP, cellulose melting compound are prepared flame-retardant aluminum plastic composite sheet, simple to operate, is suitable for suitability for industrialized production.
(4) accompanying drawing explanation
Fig. 1 is flame-retardant system structural design schematic diagram;
In figure: 1-aluminium foil, 2-silicone 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 thereto.
Embodiment 1
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) elder generation (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 extruding pelletization, obtained imvite master batch, melt zone temperature 250 ~ 260 DEG C.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, extrude through parallel equidirectional two-screw extruder melt blending again, roll, draw, cooling forming, obtained polystyrene-based composite sheet, melt zone temperature controls at 230 ~ 240 DEG C, and calendering heat roller temperature controls 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 glue cylinder, first glue cylinder is vacuumized, constant temperature (32 ~ 40 DEG C) stirs mixing again, obtained organic silicon adhesive.
Aluminium film is coated with gluing (spread 35g/m through vacuum furnace 2), delay with the hot compound of polystyrene-based composite sheet roll-in (heat roller temperature 95 ~ 105 DEG C), cold roll-in, obtained 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) elder generation (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 extruding pelletization, obtained imvite master batch, melt zone temperature 250 ~ 260 DEG C.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, extrude through parallel equidirectional two-screw extruder melt blending again, roll, draw, cooling forming, obtained polystyrene-based composite sheet, melt zone temperature controls at 230 ~ 240 DEG C, and calendering heat roller temperature controls 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 glue cylinder, first glue cylinder is vacuumized, constant temperature (32 ~ 40 DEG C) stirs mixing again, obtained organic silicon adhesive.
Aluminium film is coated with gluing (spread 35g/m through vacuum furnace 2), delay with the hot compound of polystyrene-based composite sheet roll-in (heat roller temperature 95 ~ 105 DEG C), cold roll-in, obtained flame-retardant aluminum plastic composite sheet.
Embodiment 3
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) elder generation (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 extruding pelletization, obtained imvite master batch, melt zone temperature 250 ~ 260 DEG C.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, extrude through parallel equidirectional two-screw extruder melt blending again, roll, draw, cooling forming, obtained polystyrene-based composite sheet, melt zone temperature controls at 230 ~ 240 DEG C, and calendering heat roller temperature controls 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 glue cylinder, first glue cylinder is vacuumized, constant temperature (32 ~ 40 DEG C) stirs mixing again, obtained organic silicon adhesive.
Aluminium film is coated with gluing (spread 35g/m through vacuum furnace 2), delay with the hot compound of polystyrene-based composite sheet roll-in (heat roller temperature 95 ~ 105 DEG C), cold roll-in, obtained 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) elder generation (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 extruding pelletization, obtained imvite master batch, melt zone temperature 250 ~ 260 DEG C.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, extrude through parallel equidirectional two-screw extruder melt blending again, roll, draw, cooling forming, obtained polystyrene-based composite sheet, melt zone temperature controls at 230 ~ 240 DEG C, and calendering heat roller temperature controls 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 glue cylinder, first glue cylinder is vacuumized, constant temperature (32 ~ 40 DEG C) stirs mixing again, obtained organic silicon adhesive.
Aluminium film is coated with gluing (spread 75g/m through vacuum furnace 2), delay with the hot compound of polystyrene-based composite sheet roll-in (heat roller temperature 95 ~ 105 DEG C), cold roll-in, obtained 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) elder generation (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 extruding pelletization, obtained imvite master batch, melt zone temperature 250 ~ 260 DEG C.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, extrude through parallel equidirectional two-screw extruder melt blending again, roll, draw, cooling forming, obtained polystyrene-based composite sheet, melt zone temperature controls at 230 ~ 240 DEG C, and calendering heat roller temperature controls 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 glue cylinder, first glue cylinder is vacuumized, constant temperature (32 ~ 40 DEG C) stirs mixing again, obtained organic silicon adhesive.
Aluminium film is coated with gluing (spread 35g/m through vacuum furnace 2), delay with the hot compound of polystyrene-based composite sheet roll-in (heat roller temperature 95 ~ 105 DEG C), cold roll-in, obtained 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) elder generation (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 extruding pelletization, obtained imvite master batch, melt zone temperature 250 ~ 260 DEG C.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, extrude through parallel equidirectional two-screw extruder melt blending again, roll, draw, cooling forming, obtained polystyrene-based composite sheet, melt zone temperature controls at 230 ~ 240 DEG C, and calendering heat roller temperature controls 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 glue cylinder, first glue cylinder is vacuumized, constant temperature (32 ~ 40 DEG C) stirs mixing again, obtained organic silicon adhesive.
Aluminium film is coated with gluing (spread 75g/m through vacuum furnace 2), delay with the hot compound of polystyrene-based composite sheet roll-in (heat roller temperature 95 ~ 105 DEG C), cold roll-in, obtained 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, extrude through parallel equidirectional two-screw extruder melt blending again, roll, draw, cooling forming, obtained polystyrene-based composite sheet, melt zone temperature controls at 245 ~ 255 DEG C, and calendering heat roller temperature controls at 125 ~ 180 DEG C.
Aluminium film is coated with gluing (polyvinyl acetate glue stick, spread 75g/m through vacuum furnace 2), delay with the hot compound of polystyrene-based composite sheet roll-in (heat roller temperature 95 ~ 105 DEG C), cold roll-in, obtained flame-retardant aluminum plastic composite sheet.
Performance test is carried out, examination criteria to flame-retardant aluminum plastic composite sheet prepared by embodiment 1 ~ 6 and comparative example 1: hot strength is tested according to GB/T1040-2006 " mensuration of plastic tensile performance "; Oxygen index (OI) is tested according to " plastics oxygen index method measures burning behavior "; Horizontal firing residual length is according to GB/T2408-2008 " the mensuration Using Horizontal Bridgman Method of Plastics Combustion performance and normal beam technique " 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
Embodiment 1 18.6 36 66
Embodiment 2 23.2 31 47
Embodiment 3 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
Simple analysis is once carried out to result: from table, (1) increase of polyphenylene oxide and organo montmorillonite content in composite, be conducive to the fire resistance (oxygen index (OI) rising, horizontal firing residual length increase) promoting material, but be unfavorable for the mechanical property (hot strength decline) keeping material; (2) flame retardance element in organic silicon adhesive and base material is conducive to the collaborative fire resistance promoting composite, and generally speaking, resin added is larger, and oxygen index (OI) and horizontal firing residual length increase all 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 optimum proportioning after optimization, can give the excellent 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 strengthening composite sheet.
A () be the fire-retardant use polyphenylene oxide of p-poly-phenyl ethene core, organophosphorus compounds (APP), charcoal source material (cellulose) and modified montmorillonoid first, organophosphorus ester thermal decomposition at a certain temperature produces phosphoric acid, phosphoric acid is worked in coordination with charcoal source material and is impelled top layer polystyrene material to be dehydrated into charcoal, layer of charcoal effectively can isolate spreading of oxygen and heat, and protection primer stops it to burn further; Modified montmorillonoid is uniformly distributed in inflaming retarding core material after surface modification treatment, after burning makes system reach uniform temperature, modified montmorillonoid to be bondd formation cross-linked network mutually by polyphenylene oxide pyrolysis product and layer of charcoal, this structure effectively can strengthen the intensity of large area layer of charcoal, prevents from Char Residues Structure from caving in causing primer to be exposed in air resume combustion occurs.
Secondly b (); at inflaming retarding core material surface coating one deck organosilicon polymer adhesive protective layer; continuous print, oxidation resistant silicate protective layer is formed on above-mentioned layer of charcoal surface on the one hand in polysiloxanes combustion process; promote compactness and the barrier of layer of charcoal, suppress diffusion and the heat radiation of oxygen further.Polysiloxanes also has the fire-retardant mechanism of gas phase on the other hand, in combustion process, polysiloxanes decomposes the intermediate form existence with silicic acid and esters of silicon acis, and they can eliminate the peroxy that polystyrene produces in oxicracking, play inhibitory action to the oxicracking of polymer.

Claims (9)

1. a flame-retardant aluminum plastic composite sheet, it is characterized in that 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, under 95 ~ 105 DEG C of conditions, the hot compound of roll-in, cold roll-in are delayed with polystyrene-based composite sheet again, obtained 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 ~ 25 μm;
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 be selected from a kind of in dibutyltin diacetate, dibutyl tin laurate, stannous octoate or wherein any two kinds with the mixture of arbitrary proportion.
2. flame-retardant aluminum plastic composite sheet as claimed in claim 1, it is characterized in that the source of described modified montmorillonoid is NANOCOR company of the U.S., I.28E product type is.
3. flame-retardant aluminum plastic composite sheet as claimed in claim 1, it is characterized in that described aluminium film is pure aluminum foil, thickness is 0.01 ~ 0.02mm; The thickness of described flame-retardant aluminum plastic composite sheet is 0.50 ~ 0.80mm.
4. flame-retardant aluminum plastic composite sheet as claimed in claim 1, it 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 ~ 18 μm.
5. flame-retardant aluminum plastic composite sheet as claimed in claim 1, it is characterized in that, in the raw material of described polystyrene-based composite sheet, the described cellulosic degree of polymerization is 2000 ~ 5000, particle diameter is 15 ~ 25 μm.
6. flame-retardant aluminum plastic composite sheet as claimed in claim 1, it is characterized in that, in the raw material of described polystyrene-based composite sheet, described polyphenylene oxide is Powdered, its glass transition temperature is 214 DEG C.
7. flame-retardant aluminum plastic composite sheet as claimed in claim 1, it is characterized in that in described flame-retardant aluminum plastic composite sheet, the spread of described organic silicon adhesive is 30 ~ 75g/m 2aluminium film.
8. flame-retardant aluminum plastic composite sheet as claimed in claim 1, it 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.
9. the preparation method of flame-retardant aluminum plastic composite sheet as claimed in claim 1, is characterized in that described preparation method comprises the steps:
(1) modified montmorillonoid and polyphenylene oxide melting mixing extruding pelletization are obtained imvite master batch, imvite master batch, polystyrene, APP, cellulose at 60 DEG C ~ 70 DEG C premixs, extrude through equidirectional parallel double-screw extruder melt blending after mixing, roll, draw, cooling forming, obtained polystyrene-based composite sheet;
(2) hydroxyl endblocked polydimethylsiloxane, alkyl-blocked dimethyl silicone polymer, dimethyl-penten diamines, organotin catalysts and aerosil are added glue cylinder, first glue cylinder is vacuumized, at 25 ~ 40 DEG C, constant temperature stirs mixing 20 ~ 30min again, obtained organic silicon adhesive;
(3) aluminium film presses spread 30 ~ 75g/m through vacuum furnace 2aluminium film is delayed with polystyrene-based the composite sheet hot compound of roll-in, cold roll-in under 95 ~ 105 DEG C of conditions after being coated with gluing, obtained flame-retardant aluminum plastic composite sheet.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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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