CN105670039A - High-char-forming expandable graphite and application thereof in rigid polyurethane foam - Google Patents
High-char-forming expandable graphite and application thereof in rigid polyurethane foam Download PDFInfo
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- CN105670039A CN105670039A CN201410673574.5A CN201410673574A CN105670039A CN 105670039 A CN105670039 A CN 105670039A CN 201410673574 A CN201410673574 A CN 201410673574A CN 105670039 A CN105670039 A CN 105670039A
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Abstract
The invention discloses high-char-forming expandable graphite and an application thereof in rigid polyurethane foam. The high-char-forming expandable graphite is prepared by: 1) chemically modifying high-char-forming resin or cellulose and grafting the high-char-forming resin or cellulose to surface of the expandable graphite, and modifying the expandable graphite through coupling agent modification and graft modification; 2) adding 5-20 parts of high-char-forming expandable graphite to a mixture composed of 80-100 parts of polyether glycol, 3-8 parts of a foamer, 2-4 parts of a foam stabilizer and 3-6 parts of a foaming catalyst; 3) adding 120-150 parts of a polyisocyanate compound; and 4) mixing the components, pouring the mixture, and foaming the mixture to prepare the rigid polyurethane foam. The high-char-forming expandable graphite is significantly improved in compatibility between the expandable graphite and the polyurethane foam substrate, improves mechanical performance of plastic, increases the oxygen index of the foam plastic, reduces heat release rate, significantly delays ignition time, greatly increases combustion char-forming quantity, and has excellent flame-retarding performance.
Description
Technical field
The invention belongs to expanded material technical field, be specifically related to a kind of high one-tenth charcoal expansible graphite and the application in hard polyurethane foam thereof.
Background technology
Expansible graphite (EG) is a kind of novel low cigarette, halogen-free flame retardants, and its expansion characteristics is different from other extender, and it decomposes by intercalation compound at about 200 DEG C and start expansion, and about 900 DEG C reach maximum, and its expansion multiplying power can reach 280 times. Graphite after expansion is become, by original flakey, " anthelmintic " shape that density is very low, define efficient thermal insulation, an oxygen barrier layer, graphite after expansion is the carbon source in intumescent system, himself rate of heat release in fire, hot environment is very low, mass loss is only small, the flue gas produced is also little, thus effectively acting as fire-retardant, to press down cigarette effect. Therefore EG is presently the most the additive flame retardant of efficient polyurethane foam, but EG is weak as the interface interaction power of a kind of inorganic particulate fire retardant Yu matrix material, and agglomeration is serious, the mechanical property of meeting serious deterioration polyurethane foamed material. In order to improve inorganic filler particle dispersion in the polymer, improving the performance of flame-proof composite material, generally reply inorganic particulate carries out surface treatment, the interaction between reinforcer and resin.
Chinese patent CN103554428A is prepared for the expansible graphite that the polyurethane microcapsule of a kind of Core-shell synergistic flame modifiies, and is applied in polyurethane rigid foam plastic. Ye etc. [YeL., etc.Polym.Degrad.Stab., 2009,94,971-979] adopt emulsion polymerization EG carries out PMMA coating modification and is applied to hard polyurethane foams, and fire resistance and mechanical property are all improved. Wu etc. [WuT.C., etc.J.Compos.Mater., 2011,46 (12), 1483-1496] adopt silane coupler to EG process, modifiying for PMMA, make material have good heat stability and fire resistance.
As can be seen from above, at present the property modification of EG is processed the Surface coating mainly by coupling agent surface modification and microcapsule, and the grafting modification of the functional group of EG own is not related to.
Restriction due to self chemical constitution, the one-tenth charcoal of polyurethane is general, for improving its anti-flammability further, it is usually added into the carbon source that carbon-forming performance is superior, such as thermosetting phenolic resin, containing the microcrystalline Cellulose of a large amount of activity hydroxies, itself have good become charcoal, self-extinguishment, promotes that polyurethane becomes charcoal further.
Summary of the invention
It is an object of the invention to improve the problem of the fire-retardant polyurethane foam poor mechanical property of expansible graphite, and improve one-tenth charcoal and the fire resistance of polyurethane foam further; The invention provides a kind of high one-tenth charcoal expansible graphite and the application in hard polyurethane foam thereof. Utilization itself becomes charcoal high, expansible graphite is carried out graft modification by the macromolecular compound having certain fire resistance, can effectively reduce HRR during polyurethane foam combustion, improve into charcoal and anti-flammability, reduce expansible graphite and individually add the adverse effect to foam mechanical property.
It is an object of the invention to be achieved through the following technical solutions:
A kind of high one-tenth charcoal expansible graphite, is that height becomes the resin of charcoal or cellulose by chemical modification and are grafted to expansible graphite surface, is prepared by following steps:
(1) coupling agent modified expansible graphite
Being dissolved in by coupling agent in dehydrated alcohol and form coupling agent solution, then expansible graphite that will be dry adds stirring 15-30min in coupling agent solution, final drying obtains coupling agent modified expansible graphite; The consumption of described coupling agent is the 2-4% of expansible graphite quality;
(2) graft modification expansible graphite
Above-mentioned modified expansible graphite is dispersed in dioxane, adds the phosphorus oxychloride accounting for expansible graphite quality 30-50%, constant temperature 60oC stirs 2-4h, adds the height accounting for expansible graphite quality 40-80% and becomes charcoal material, is warming up to 60-80oC reacts 5-12h, is then down to room temperature, and filtration, washing the dry height that obtains become charcoal expansible graphite.
Further, the particle diameter of described expansible graphite is 0.18-0.30mm; Dry expansible graphite is in 60-80 by expansible graphiteoC dries 4-6h gained.
Described coupling agent is the one in titanate coupling agent sec.-propyl three (dioctyl phosphoric acid acyloxy) titanic acid ester (NDZ-102), isopropyl three (dioctylphyrophosphoric acid acyloxy) titanate esters (NDZ-201), silane coupler gamma-aminopropyl-triethoxy-silane (KH-550), γ-glycydoxy trimethoxy silane (KH-560); The mass percent concentration of described coupling agent solution is 90%.
Described high one-tenth charcoal material is the one in thermosetting phenolic resin prepolymer or microcrystalline Cellulose.
Another goal of the invention of the present invention is to provide a kind of height containing above-mentioned high one-tenth charcoal expansible graphite and becomes charcoal expansible graphite flame retardant polyurethane rigid foam, is be prepared from by weight by following components:
Polyether polyol 80-100 part,
Polyisocyanate compound 120-150 part,
High one-tenth charcoal expansible graphite 5-20 part,
Foaming agent 3-8 part,
Foaming stabiliser 2-4 part,
Kicker 3-6 part.
Further, described polyether polyol is hydroxyl value is 200-500mgKOH/g and Weighted Average Functionality is the polyether polyol of 2-4, arbitrary monomer in polypropylene oxide glycol, polypropylene glycol, poly(ethylene oxide) glycol, Polyethylene Glycol, polytetrahydrofuran diol, or the dihydroxylic alcohols formed by homopolymerization/copolymerization between them or polyhydric alcohol.
Described polyisocyanate compound is chosen from least one in aromatic polyisocyanate, aliphatic polyisocyante or alicyclic polyisocyanates.
Described foaming agent is the one in pure water, hydrogen fluorochlorohydrocarbon one fluorine dichloroethanes (HCFC-141b) or pentane.
Described foaming stabiliser is polysiloxanes.
Described kicker is the mixture of dibutyl tin laurate, triethylene diamine and triethanolamine.
The preparation method of above-mentioned high one-tenth charcoal expansible graphite flame retardant polyurethane rigid foam, comprises the following steps:
(1) in 80-100 part polyether polyol, add the high one-tenth charcoal expansible graphite of 5-20 part, 3-8 part foaming agent, 2-4 part foaming stabiliser and 3-6 part kicker by weight, be at room temperature uniformly mixing to obtain polyol blends with the rotating speed of 2500-3000r/min;
(2) 120-150 part polyisocyanate compound is poured in above-mentioned polyol blends, in 23-25oIt is poured in mould after stirring at C temperature foaming, and at 65-80oAfter C ripening, namely the demoulding obtains the polyurethane rigid foam plastic that high one-tenth charcoal expansible graphite is fire-retardant.
Effective effect of the present invention is:
1. the present invention utilizes and self becomes charcoal high, there is certain anti-flammability, and expansible graphite is carried out graft modification by thermosetting phenolic resin prepolymer and the microcrystalline Cellulose containing a large amount of active function groups, owing to thermosetting phenolic resin prepolymer and microcrystalline Cellulose contain the activity hydroxy that can react in a large number with isocyanate groups, the modified height obtained is made to become charcoal expansible graphite surface to contain a large amount of activity hydroxy, foaming process can react with polyisocyanate compound, chemical bond is formed with matrix, improve the compatibility, and can persistently keep fire resistance in the base, not easily migrate to foam surface. thus obtaining into that charcoal is high, flame retarding efficiency excellent and persistently, the addition type expanding fire retardant good with the matrix resin compatibility.
2. the fire-retardant polyurethane foam of the modified expansible graphite that prepared by the present invention improve expansible graphite be individually added on the poor compatibility in polyurethane foam, easily migrate, the shortcoming of mechanical properties decrease, utilize the activity hydroxy that modified expansible graphite contains can react this feature with matrix, while improve one-tenth charcoal and the anti-flammability of polyurethane foam, improve the compatibility and the mechanical property of addition type highly effective flame-retardant foam.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further described:
The particle diameter of raw material expansible graphite selected in example below is 0.18-0.30mm.
Embodiment 1
1, by expansible graphite (EG) in 60oC dries 4h, container equipped with stirring adds the coupling agent KH-550 and the dehydrated alcohol that account for expansible graphite quality 2%, form 90% coupling agent solution, drier expansible graphite is added in coupling agent solution and stirs the expansible graphite that drying to obtain after 15min is coupling agent modified;
Above-mentioned modified expansible graphite is dispersed in dioxane, adds the phosphorus oxychloride accounting for expansible graphite quality 30%, constant temperature 60oC stirs 2h, adds the thermosetting phenolic resin prepolymer of expansible graphite quality 40%, is warming up to 60oC reacts 5h, is then down to room temperature, and filtration, washing the dry height that obtains become charcoal expansible graphite.
2, by weight, the polypropylene oxide glycol that 80 parts of hydroxyl values are 450mgKOH/g adds the mixture of 5 parts high one-tenth charcoal expansible graphites, 3 parts of pure water, 2 parts of polysiloxanes, 3 parts of dibutyl tin laurates, triethylene diamine and triethanolamine, is at room temperature uniformly mixing to obtain polyol blends with the rotating speed of 2500r/min; Add 120 parts of toluene di-isocyanate(TDI)s in 23oIt is poured in mould after stirring at C temperature foaming, and 65oAfter C ripening, namely the demoulding obtains the hard polyurethane foam that high one-tenth charcoal expansible graphite is fire-retardant.
Embodiment 2
1, by expansible graphite EG in 70oC dries 5h, container equipped with stirring adds the coupling agent KH-560 and the dehydrated alcohol that account for expansible graphite quality 3%, form 90% coupling agent solution, drier expansible graphite is added in coupling agent solution and stirs the expansible graphite that drying to obtain after 20min is coupling agent modified;
Above-mentioned modified expansible graphite is dispersed in dioxane, adds the phosphorus oxychloride of expansible graphite quality 40%, constant temperature 60oC stirs 3h, adds the thermosetting phenolic resin prepolymer of expansible graphite quality 50%, is warming up to 70oC reacts 8h, is then down to room temperature, and filtration, washing the dry height that obtains become charcoal expansible graphite.
2, by weight, the poly(ethylene oxide) glycol that 90 parts of hydroxyl values are 500mgKOH/g adds the mixture of 10 parts high one-tenth charcoal expansible graphites, 3 parts of pure water, 3 parts of polysiloxanes, 4 parts of dibutyl tin laurates, triethylene diamine and triethanolamine, is at room temperature uniformly mixing to obtain polyol blends with the rotating speed of 2500r/min; Add 120 parts of methyl diphenylene diisocyanates in 23oIt is poured in mould after stirring at C temperature foaming, and 65oAfter C ripening, namely the demoulding obtains the hard polyurethane foam that high one-tenth charcoal expansible graphite is fire-retardant.
Embodiment 3
1, by expansible graphite EG in 70oAfter the dry 5h of C, container equipped with stirring adds the coupling agent NDZ-201 and the dehydrated alcohol that account for expansible graphite quality 4%, form 90% coupling agent solution, then will take out, in dry expansible graphite addition coupling agent solution and after stirring 30min, the expansible graphite that drying to obtain is coupling agent modified;
Above-mentioned modified expansible graphite is dispersed in dioxane, adds the phosphorus oxychloride of expansible graphite quality 50%, constant temperature 60oC stirs 4h, adds the thermosetting phenolic resin prepolymer of expansible graphite quality 60%, is warming up to 80oC reacts 10h, is then down to room temperature, and filtration, washing the dry height that obtains become charcoal expansible graphite.
2, by weight, the polytetrahydrofuran diol that 100 parts of hydroxyl values are 200mgKOH/g adds the mixture of 15 parts high one-tenth charcoal expansible graphites, 5 parts of pure water, 4 parts of polysiloxanes, 6 parts of dibutyl tin laurates, triethylene diamine and triethanolamine, at room temperature the rotating speed of 3000r/min is uniformly mixing to obtain polyol blends, adds 150 parts of poly methylene poly phenyl poly isocyanates in 25oIt is poured in mould after stirring at C temperature foaming, and 80oAfter C ripening, namely the demoulding obtains the hard polyurethane foam that high one-tenth charcoal expansible graphite is fire-retardant.
Embodiment 4
1, by expansible graphite EG in 80oAfter the dry 6h of C, container equipped with stirring adds the coupling agent NDZ-102 and the dehydrated alcohol that account for expansible graphite quality 4%, form 90% coupling agent solution, then will take out, in dry expansible graphite addition coupling agent solution and after stirring 30min, the expansible graphite that drying to obtain is coupling agent modified;
Above-mentioned modified expansible graphite is dispersed in dioxane, adds the phosphorus oxychloride of expansible graphite quality 50%, constant temperature 60oC stirs 4h, adds the thermosetting phenolic resin prepolymer of expansible graphite quality 80%, is warming up to 80oC reacts 12h, is then down to room temperature, and filtration, washing the dry height that obtains become charcoal expansible graphite.
2, by weight, the polypropylene oxide glycol that 100 parts of hydroxyl values are 300mgKOH/g adds the mixture of 20 parts high one-tenth charcoal expansible graphites, 8 parts of hydrogen fluorochlorohydrocarbon one fluorine dichloroethanes, 4 parts of polysiloxanes, 6 parts of dibutyl tin laurates, triethylene diamine and triethanolamine, at room temperature it is uniformly mixing to obtain polyol blends with the rotating speed of 3000r/min, adds 150 parts of methyl diphenylene diisocyanates in 25oIt is poured in mould after stirring at C temperature foaming, and 80oAfter C ripening, namely the demoulding obtains the hard polyurethane foam that high one-tenth charcoal expansible graphite is fire-retardant.
Embodiment 5
1, by expansible graphite EG in 80oAfter the dry 6h of C, container equipped with stirring adds the coupling agent NDZ-201 and the dehydrated alcohol that account for expansible graphite quality 4%, form 90% coupling agent solution, then will take out, in dry expansible graphite addition coupling agent solution and after stirring 30min, the expansible graphite that drying to obtain is coupling agent modified;
Above-mentioned modified expansible graphite is dispersed in dioxane, adds the phosphorus oxychloride of expansible graphite quality 50%, constant temperature 60oC stirs 4h, adds the microcrystalline Cellulose of expansible graphite quality 80%, is warming up to 80oC reacts 12h, is then down to room temperature, filters, and washing the dry height that obtains become charcoal expansible graphite.
2, by weight, the polypropylene oxide glycol that 90 parts of hydroxyl values are 450mgKOH/g adds 15 parts high one-tenth charcoal expansible graphites, the mixture of 5 parts of pentanes, 4 parts of polysiloxanes, 6 parts of dibutyl tin laurates, triethylene diamine and triethanolamine, is at room temperature uniformly mixing to obtain polyol blends with the rotating speed of 2800r/min. By proportioning, 140 parts of methyl diphenylene diisocyanates are poured in above-mentioned polyol blends, in 24oIt is poured in mould after stirring at C temperature foaming, and 70oAfter C ripening, namely the demoulding obtains high one-tenth charcoal expansible graphite flame retardant polyurethane rigid foam.
Comparative example 1
By weight, the mixture adding 3 parts of pure water, 3 parts of polysiloxanes, 5 parts of dibutyl tin laurates, triethylene diamine and triethanolamine in the polypropylene oxide glycol that 100 parts of hydroxyl values are 450mgKOH/g is at room temperature uniformly mixing to obtain polyol blends with the rotating speed of 3000r/min; Add 150 parts of methyl diphenylene diisocyanates in 25oIt is poured in mould after stirring under C foaming, and 80oAfter C ripening, namely the demoulding obtains pure RPUF.
Comparative example 2
By weight, the polypropylene oxide glycol that 100 parts of hydroxyl values are 450mgKOH/g adds the mixture of 15 parts of unmodified expansible graphites, 3 parts of pure water, 3 parts of polysiloxanes, 5 parts of dibutyl tin laurates, triethylene diamine and triethanolamine, at room temperature it is uniformly mixing to obtain polyol blends with the rotating speed of 3000r/min, adds 150 parts of methyl diphenylene diisocyanates in 25oIt is poured in mould after stirring under C foaming, and 80oAfter C ripening, namely the demoulding obtains the RPUF that expansible graphite is fire-retardant.
Comparative example 3
1, by expansible graphite in 80oAfter the dry 6h of C, container equipped with stirring adds the coupling agent NDZ-201 and the ethanol solution that account for expansible graphite quality 4%, form 90% coupling agent, then will take out, in dry expansible graphite addition coupling agent solution and after stirring 30min, the expansible graphite that drying to obtain is coupling agent modified;
2, by weight, 100 parts of polypropylene oxide glycol add the mixture of 15 parts of modified expansible graphites, 3 parts of pure water, 3 parts of polysiloxanes, 3 parts of dibutyl tin laurates, triethylene diamine and triethanolamine, at room temperature it is uniformly mixing to obtain polyol blends with the rotating speed of 3000r/min, adds 150 parts of methyl diphenylene diisocyanates in 25oIt is poured in mould after stirring under C foaming, and 80oAfter C ripening, namely the demoulding obtains the hard polyurethane foam that modified expansible graphite is fire-retardant.
In the various embodiments described above of the present invention, the test data of the polyurethane foam plastics of preparation record as follows:
The apparent density of foam is tested according to GB/T6343-2009, and batten is of a size of 50 × 50 × 50mm3。
Compression performance is tested according to GB/T8813-2008.Batten size 50 × 50 × 30mm3. Compression speed is 3mm/min, and compressive deformation is 15%.
The bending property of rigid foam is tested according to GB/T8812-2007, batten size 120 × 25 × 20mm3, load pressure presses with the speed of 10mm/min.
Limited oxygen index (LOI) is to test on HC-2 type oxygen index instrument (Jiangning Instrumental Analysis company of China produces) according to ASTMD2863 standard, and batten is of a size of 150 × 10 × 10mm3。
HRR (KW/m2) and burning time (s) by conic heat meter (StantonRedcroft company of Britain) test obtain according to ISO5600 standard test. Sample cuts into 100 × 100 × 25mm3Size. During test, set the radiation heat flux of instrument as 35kW/m2。
700oC neat coal amout is to carry out on TGAQ5000IR thermal analyzer (TA company of the U.S.), and temperature elevating range is 30-700oC, heating rate is 20oC/min, air velocity is 100ml/min, and the atmosphere of gas is oxygen.
Table 1, polyurethane foam plastics performance test
| Performance | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Density g/cm3 | 57.3 | 56.5 | 54.6 | 54.3 | 54.9 | 59.8 | 53.0 | 53.6 |
| Compressive strength MPa | 0.298 | 0.301 | 0.294 | 0.284 | 0.307 | 0.321 | 0.217 | 0.236 |
| Bending strength MPa | 0.198 | 0.176 | 0.183 | 0.178 | 0.189 | 0.202 | 0.143 | 0.156 |
| Oxygen index (OI) % | 27.0 | 30.0 | 32.5 | 37.0 | 32.0 | 20.0 | 27.5 | 27.0 |
| HRR (KW/m2) | 351 | 257 | 193 | 165 | 178 | 414 | 321 | 356 |
| Burning time (s) | 23 | 78 | 123 | 142 | 131 | 7 | 13 | 10 |
| 700oC neat coal amout % | 5.7 | 7.8 | 8.5 | 8.9 | 8.2 | 0.2 | 5.3 | 4.7 |
Being appreciated that by upper table test result: comparative example 1 is pure foam plastics, and comparative example 2 is to add unmodified expansible graphite, the compressive strength of the foam in comparative example 2 and bending strength relatively comparative example 1 pure foam have dropped 32%, 29%; And comparative example 3 is the expansible graphite only using coupling agent surface treatment to prepare flame-retardant foam, though its mechanical property slightly improves than comparative example 2, but still than the poor mechanical property of comparative example 1 pure foam.
Embodiment 1-5 and comparative example 2-3 contrast is known, owing to the present invention is the hard polyurethane foam adopting the expansible graphite through graft modification to prepare, its mechanical property such as compressive strength and bending strength are improved, and relatively comparative example 1 pure foam; The expansible graphite (embodiment 3 and embodiment 5) of the graft modification wherein adding 15% slightly improves than unmodified (comparative example 2) and the oxygen index (OI) of foam only prepared with the expansible graphite of coupling agent modified (comparative example 3), HRR substantially reduces, burning time is postponed substantially, and 700oC neat coal amout is also because height becomes the resin of charcoal and fiber to be improved in a large number in grafting, and fire resistance is greatly improved.
The above-mentioned description to embodiment is to be understood that for ease of those skilled in the art and apply the present invention. These embodiments obviously easily can be made various amendment by person skilled in the art, and General Principle described herein is applied in other embodiments without through performing creative labour. Therefore, the invention is not restricted to embodiment here, those skilled in the art's announcement according to the present invention, the improvement made without departing from scope and amendment all should within protection scope of the present invention.
Claims (10)
1. one kind high one-tenth charcoal expansible graphite, it is characterised in that: it is that height becomes the resin of charcoal or cellulose by chemical modification and are grafted to expansible graphite surface, is prepared by following steps:
(1) coupling agent modified expansible graphite
Being dissolved in by coupling agent in dehydrated alcohol and form coupling agent solution, then expansible graphite that will be dry adds stirring 15-30min in coupling agent solution, final drying obtains coupling agent modified expansible graphite;The consumption of described coupling agent is the 2-4% of expansible graphite quality;
(2) graft modification expansible graphite
Above-mentioned modified expansible graphite is dispersed in dioxane, adds the phosphorus oxychloride accounting for expansible graphite quality 30-50%, constant temperature stirring 2-4h, add the height accounting for expansible graphite quality 40-80% and become charcoal material, be warming up to 60-80oC reacts 5-12h, is then down to room temperature, and filtration, washing the dry height that obtains become charcoal expansible graphite.
2. high one-tenth charcoal expansible graphite according to claim 1, it is characterised in that: the particle diameter of described expansible graphite is 0.18-0.30mm; Described dry expansible graphite is in 60-80 by expansible graphiteoC dries 4-6h gained.
3. high one-tenth charcoal expansible graphite according to claim 1, it is characterised in that: described coupling agent is the one in titanate coupling agent sec.-propyl three (dioctyl phosphoric acid acyloxy) titanic acid ester, isopropyl three (dioctylphyrophosphoric acid acyloxy) titanate esters, silane coupler gamma-aminopropyl-triethoxy-silane, γ-glycydoxy trimethoxy silane; The mass percent concentration of described coupling agent solution is 90%.
4. high one-tenth charcoal expansible graphite according to claim 1, it is characterised in that: described high one-tenth charcoal material is the one in thermosetting phenolic resin prepolymer or microcrystalline Cellulose.
5. one kind becomes the height of charcoal expansible graphite to become charcoal expansible graphite flame retardant polyurethane rigid foam containing the height described in any one of claim 1-4, it is characterised in that: be prepared from by weight by following components:
Polyether polyol 80-100 part,
Polyisocyanate compound 120-150 part,
High one-tenth charcoal expansible graphite 5-20 part,
Foaming agent 3-8 part,
Foaming stabiliser 2-4 part,
Kicker 3-6 part.
6. high one-tenth charcoal expansible graphite flame retardant polyurethane rigid foam according to claim 5, it is characterized in that: described polyether polyol is hydroxyl value is 200-500mgKOH/g and Weighted Average Functionality is the polyether polyol of 2-4, arbitrary monomer in polypropylene oxide glycol, polypropylene glycol, poly(ethylene oxide) glycol, Polyethylene Glycol, polytetrahydrofuran diol, or the dihydroxylic alcohols formed by homopolymerization/copolymerization between them or polyhydric alcohol.
7. high one-tenth charcoal expansible graphite flame retardant polyurethane rigid foam according to claim 5, it is characterised in that: described polyisocyanate compound is chosen from least one in aromatic polyisocyanate, aliphatic polyisocyante or alicyclic polyisocyanates.
8. high one-tenth charcoal expansible graphite flame retardant polyurethane rigid foam according to claim 5, it is characterised in that: described foaming agent is the one in pure water, hydrogen fluorochlorohydrocarbon one fluorine dichloroethanes or pentane.
9. high one-tenth charcoal expansible graphite flame retardant polyurethane rigid foam according to claim 5, it is characterised in that: described foaming stabiliser is polysiloxanes; Described kicker is the mixture of dibutyl tin laurate, triethylene diamine and triethanolamine.
10. the preparation method of a high one-tenth charcoal expansible graphite flame retardant polyurethane rigid foam as claimed in claim 5, it is characterised in that: comprise the following steps:
(1) in 80-100 part polyether polyol, add the high one-tenth charcoal expansible graphite of 5-20 part, 3-8 part foaming agent, 2-4 part foaming stabiliser and 3-6 part kicker by weight, be at room temperature uniformly mixing to obtain polyol blends with the rotating speed of 2500-3000r/min;
(2) 120-150 part polyisocyanate compound is poured in above-mentioned polyol blends, in 23-25oIt is poured in mould after stirring at C temperature foaming, and at 65-80oCAfter ripening, namely the demoulding obtains the polyurethane rigid foam plastic that high one-tenth charcoal expansible graphite is fire-retardant.
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| CN106478920A (en) * | 2016-10-20 | 2017-03-08 | 天津城建大学 | A kind of inorganic compounding flame retardant polyurethane rigid foam material and preparation method thereof |
| CN107353391A (en) * | 2017-07-18 | 2017-11-17 | 合肥广能新材料科技有限公司 | Halogen-free flameproof rigid polyurethane foam and preparation method thereof |
| CN108822277A (en) * | 2018-07-23 | 2018-11-16 | 德清顾舒家华高分子材料有限公司 | It is a kind of using organic-silicon-modified expanded graphite as the polyurethane foam of fire retardant |
| CN109081899A (en) * | 2018-07-23 | 2018-12-25 | 德清顾舒家华高分子材料有限公司 | A kind of fire-retardant heat insulation polyurethane foam |
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| CN110963492A (en) * | 2019-12-04 | 2020-04-07 | 常州市艾森塑料科技有限公司 | Preparation method of modified expanded graphite |
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| CN111574874A (en) * | 2020-06-10 | 2020-08-25 | 长沙三思新材料科技有限公司 | Preparation method of intumescent fire-retardant powder coating |
| CN112898766A (en) * | 2021-01-27 | 2021-06-04 | 陈裕嫦 | Hard antibacterial plastic material and preparation method thereof |
| CN112898766B (en) * | 2021-01-27 | 2022-07-19 | 邢台金天儿童用品有限公司 | Hard antibacterial plastic material and preparation method thereof |
| CN114213058A (en) * | 2021-12-01 | 2022-03-22 | 青阳绿能粒子开发有限公司 | Modified inorganic powder material and preparation method thereof |
| CN114213058B (en) * | 2021-12-01 | 2022-08-09 | 青阳绿能粒子开发有限公司 | Modified inorganic powder material and preparation method thereof |
| CN115975246A (en) * | 2023-01-12 | 2023-04-18 | 山东农业大学 | Carbonized cork composite polyurethane co-foaming flame-retardant thermal-insulation material and preparation method thereof |
| CN116606474A (en) * | 2023-05-08 | 2023-08-18 | 扬州斯帕克实业有限公司 | Preparation method of flame-retardant polypropylene foaming material |
| CN116606474B (en) * | 2023-05-08 | 2024-02-09 | 扬州斯帕克实业有限公司 | Preparation method of flame-retardant polypropylene foaming material |
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