CN105670039B - It is a kind of high at charcoal expansible graphite and its application in hard polyurethane foam - Google Patents
It is a kind of high at charcoal expansible graphite and its application in hard polyurethane foam Download PDFInfo
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Abstract
The invention discloses a kind of high at charcoal expansible graphite and its application in polyurethane rigid foam plastic, it is a kind of high at charcoal expansible graphite, it is that height is passed through into chemical modification at the resin or cellulose of charcoal and is grafted to expansible graphite surface, is prepared by coupling agent modified expansible graphite, graft modification expansible graphite.Again by it is 5-20 parts high at charcoal expansible graphite be added to 80-100 parts of polyether polyol, 3-8 parts of foaming agents, 2-4 parts of foaming stabilisers, 3-6 parts of kickers mixture in, 120-150 parts of polyisocyanate compounds are added, are prepared flame retardant polyurethane rigid foam through mixing, casting, foaming.The compatibility of expansible graphite Yu polyurethane foam matrix is significantly improved, the mechanical property of plastics is improved, and improves the oxygen index (OI) of foamed plastics, reduces heat release rate, additionally it is possible to obviously postpone burning time, greatly improve burning neat coal amout, excellent fireproof performance.
Description
Technical field
The invention belongs to foamed material technical fields, and in particular to a kind of high at charcoal expansible graphite and its in rigid polyurethane
Application in matter foam.
Background technique
Expansible graphite (EG) is the novel low cigarette of one kind, halogen-free flame retardants, and expansion characteristics are different from other swelling agents,
It starts to expand at 200 DEG C or so by intercalation compound decomposition, and 900 DEG C or so reach maximum value, and expansion multiplying power can be with
Reach 280 times.Graphite after expansion becomes very low " worm " shape of density by original flakey, forms one efficiently absolutely
Heat, oxygen barrier layer, the graphite after expansion is the carbon source in intumescent system, its own rate of heat release in fire, hot environment is very
Low, the flue gas of mass loss very little, generation is also seldom, to effectively act as the effect of fire-retardant suppression cigarette.Therefore EG is presently the most
The additive flame retardant of efficient polyurethane foam, but interface interaction of the EG as a kind of inorganic particulate fire retardant and basis material
Power is weak, and agglomeration is serious, the mechanical property of meeting serious deterioration polyurethane foamed material.In order to improve inorganic filler particle poly-
The dispersion in object is closed, the performance of flame retardant composite material is improved, inorganic particulate should be usually surface-treated, reinforcing filler and tree
Interaction between rouge.
The polyurethane microcapsule that Chinese patent CN103554428A is prepared for a kind of Core-shell synergistic flame is modified inflatable
Graphite, and be applied in polyurethane rigid foam plastic.Ye etc. [Ye L., etc. Polym. Degrad. Stab.,
2009,94,971-979] PMMA coating modification is carried out to EG using emulsion polymerization and is applied to hard polyurethane foams,
Flame retardant property is improved with mechanical property.Wu etc. [Wu T. C., etc. J. Compos. Mater., 2011,46
(12), 1483-1496] EG is handled using silane coupling agent, for the modification of PMMA, there is material preferable
Thermal stability and flame retardant property.
As can be seen from above, the table of coupling agent surface modification and microcapsules is mainly passed through to the property modification processing of EG at present
Bread covers, and does not relate to the grafting modification of EG functional group itself.
Due to the limitation of itself chemical structure, polyurethane it is general at charcoal, to further increase its anti-flammability, usually plus
Enter the superior carbon source of carbon-forming performance, such as thermosetting phenolic resin, the microcrystalline cellulose containing a large amount of activity hydroxies, itself has
Well at charcoal, self-extinguishment promotes polyurethane further at charcoal.
Summary of the invention
The purpose of the present invention is improving the fire-retardant polyurethane foam poor mechanical property of expansible graphite, and into one
Step improve polyurethane foam at charcoal and flame retardant property；The present invention provides a kind of high at charcoal expansible graphite and its in poly- ammonia
Application in ester rigid foam.Using itself at charcoal height, there is the high-molecular compound of certain flame retardant property to expansible graphite
Graft modification is carried out, can effectively reduce heat release rate when polyurethane foam combustion, is improved into charcoal and anti-flammability, reduction can
Expanded graphite individually adds the adverse effect to foam mechanical property.
The purpose of the present invention is achieved through the following technical solutions:
It is a kind of high at charcoal expansible graphite, it is height to be passed through into chemical modification at the resin or cellulose of charcoal and be grafted to can be swollen
Swollen graphite surface, is prepared by following steps:
(1) coupling agent modified expansible graphite
Coupling agent is dissolved in dehydrated alcohol and forms coupling agent solution, then coupling agent is added in dry expansible graphite
15-30min is stirred in solution, finally dry coupling agent modified expansible graphite；The dosage of the coupling agent is inflatable
The 2-4% of graphite quality；
(2) graft modification expansible graphite
The expansible graphite of above-mentioned modification is dispersed in dioxane, addition accounts for the three of expansible graphite quality 30-50%
Chlorethoxyfos, constant temperature 60oC stirs 2-4h, adds the height for accounting for expansible graphite quality 40-80% into charcoal substance, is warming up to 60-80oC
5-12h is reacted, room temperature is then down to, filter, wash and is dried to obtain height into charcoal expansible graphite.
Further, the partial size of the expansible graphite is 0.18-0.30mm；Dry expansible graphite is by inflatable stone
Ink is in 60-80oObtained by the dry 4-6h of C.
The coupling agent be titanate coupling agent isopropyl three (dioctyl phosphoric acid acyloxy) titanate esters (NDZ-102),
Isopropyl three (dioctylphyrophosphoric acid acyloxy) titanate esters (NDZ-201), silane coupling agent gamma-aminopropyl-triethoxy-silane
(KH-550), one of γ-glycidyl ether oxypropyltrimethoxysilane (KH-560)；The matter of the coupling agent solution
Measuring percent concentration is 90%.
The height is one of thermosetting phenolic resin prepolymer or microcrystalline cellulose at charcoal substance.
Another goal of the invention of the invention is to provide a kind of containing above-mentioned high at the high inflatable at charcoal of charcoal expansible graphite
Graphite flame retardant polyurethane rigid foam plastics are prepared by weight by following components:
80-100 parts of polyether polyol,
120-150 parts of polyisocyanate compound,
Height at 5-20 parts of charcoal expansible graphite,
3-8 parts of foaming agent,
2-4 parts of foaming stabiliser,
3-6 parts of kicker.
Further, the polyether polyol is the polyethers that hydroxyl value is 200-500mgKOH/g and Weighted Average Functionality is 2-4
Type polyalcohol, as appointed in polypropylene oxide glycol, polypropylene glycol, polyethylene oxide glycol, polyethylene glycol, polytetrahydrofuran diol
One monomer or the dihydric alcohol or polyalcohol formed between them by homopolymerization/copolymerization.
The polyisocyanate compound is selected from aromatic polyisocyanate, aliphatic polyisocyante or alicyclic
At least one of polyisocyanates.
The foaming agent is one of pure water, one fluorine dichloroethanes (HCFC-141b) of hydrogen fluorochlorohydrocarbon or pentane.
The foaming stabiliser is polysiloxanes.
The kicker is the mixture of dibutyl tin dilaurate, triethylene diamine and triethanolamine.
The above-mentioned high preparation method at charcoal expansible graphite flame retardant polyurethane rigid foam plastics, comprising the following steps:
(1) it is added by weight in 80-100 parts of polyether polyol 5-20 parts high at charcoal expansible graphite, 3-8 parts of foaming
Agent, 2-4 parts of foaming stabilisers and 3-6 parts of kickers, are stirred evenly at room temperature with the revolving speed of 2500-3000 r/min
To polyol blends；
(2) 120-150 parts of polyisocyanate compounds are poured into above-mentioned polyol blends, in 23-25oAt a temperature of C
It is poured into foaming in mold after mixing evenly, and in 65-80 oDemoulding obtains high at the resistance of charcoal expansible graphite after C curing
The polyurethane rigid foam plastic of combustion.
Effective effect of the invention are as follows:
1. the present invention, at charcoal height, there is certain anti-flammability using itself, and contains the thermosetting property phenol of a large amount of active function groups
Urea formaldehyde prepolymer and microcrystalline cellulose carry out graft modification to expansible graphite, due to thermosetting phenolic resin prepolymer and micro-
Crystalline cellulose contains the activity hydroxy that can largely react with isocyanate groups, makes modified obtained height at charcoal expansible graphite
A large amount of activity hydroxies are contained on surface, can react with polyisocyanate compound in foaming process, form chemical bond with matrix, change
Kind compatibility, and flame retardant property can be persistently kept in the base, it is not easy to migrate to foam surface.To obtain into, charcoal is high, hinders
Fuel efficiency rate is excellent and lasting, the addition type expanding fire retardant good with matrix resin compatibility.
2. the fire-retardant polyurethane foam of modified expansible graphite prepared by the present invention improves expansible graphite and individually adds
The shortcomings that poor compatibility in polyurethane foam, easy to migrate, mechanical properties decrease, contained using modified expansible graphite
Activity hydroxy this feature can be reacted with matrix, improve polyurethane foam at charcoal and anti-flammability while, improve
The compatibility and mechanical property of addition type highly effective flame-retardant foam.
Specific embodiment
Below with reference to specific embodiment, the present invention is further described:
The partial size of selected raw material expansible graphite is 0.18-0.30mm in following example.
Embodiment 1
1, by expansible graphite (EG) in 60oC dries 4h, is added in the container equipped with stirring and accounts for expansible graphite quality
2% coupling agent KH-550 and dehydrated alcohol forms 90% coupling agent solution, then dry expansible graphite addition coupling agent is molten
In liquid and stir the coupling agent modified expansible graphite of drying to obtain after 15min；
The expansible graphite of above-mentioned modification is dispersed in dioxane, the trichlorine for accounting for expansible graphite quality 30% is added
Oxygen phosphorus, constant temperature 60oC stirs 2h, adds the thermosetting phenolic resin prepolymer of expansible graphite quality 40%, is warming up to 60oC is anti-
5h is answered, room temperature is then down to, filter, wash and is dried to obtain height into charcoal expansible graphite.
2,5 parts of height in parts by weight, are added in the polypropylene oxide glycol that 80 parts of hydroxyl values are 450mgKOH/g into charcoal
Expansible graphite, 3 parts of pure water, 2 parts of polysiloxanes, 3 parts of dibutyl tin dilaurates, triethylene diamine and triethanolamine it is mixed
Object is closed, polyol blends are uniformly mixing to obtain with the revolving speed of 2500r/min at room temperature；Add 120 parts of toluene diisocyanates
Acid esters is in 23oFoaming in mold is poured at a temperature of C after mixing evenly, and 65 oDemoulding obtains height into charcoal after C curing
The fire-retardant hard polyurethane foam of expansible graphite.
Embodiment 2
1, by expansible graphite EG in 70oC dries 5h, is added in the container equipped with stirring and accounts for expansible graphite quality 3%
Coupling agent KH-560 and dehydrated alcohol, form 90% coupling agent solution, then coupling agent solution is added in dry expansible graphite
In and stir the coupling agent modified expansible graphite of drying to obtain after 20min；
The expansible graphite of above-mentioned modification is dispersed in dioxane, the trichlorine oxygen of expansible graphite quality 40% is added
Phosphorus, constant temperature 60oC stirs 3h, adds the thermosetting phenolic resin prepolymer of expansible graphite quality 50%, is warming up to 70oC reaction
Then 8h is down to room temperature, filter, wash and be dried to obtain height into charcoal expansible graphite.
2,10 parts of height in parts by weight, are added in the polyethylene oxide glycol that 90 parts of hydroxyl values are 500mgKOH/g into charcoal
Expansible graphite, 3 parts of pure water, 3 parts of polysiloxanes, 4 parts of dibutyl tin dilaurates, triethylene diamine and triethanolamine it is mixed
Object is closed, polyol blends are uniformly mixing to obtain with the revolving speed of 2500r/min at room temperature；Add 120 parts of diphenyl methanes
Diisocyanate is in 23oFoaming in mold is poured at a temperature of C after mixing evenly, and 65 oDemoulding obtains after C curing
The height hard polyurethane foam fire-retardant at charcoal expansible graphite.
Embodiment 3
1, by expansible graphite EG in 70oAfter the dry 5h of C, it is added in the container equipped with stirring and accounts for expansible graphite quality
4% coupling agent NDZ-201 and dehydrated alcohol forms 90% coupling agent solution, then coupling agent is added in dry expansible graphite
The coupling agent modified expansible graphite of drying to obtain is taken out in solution and after stirring 30min；
The expansible graphite of above-mentioned modification is dispersed in dioxane, the trichlorine oxygen of expansible graphite quality 50% is added
Phosphorus, constant temperature 60oC stirs 4h, adds the thermosetting phenolic resin prepolymer of expansible graphite quality 60%, is warming up to 80oC reaction
Then 10h is down to room temperature, filter, wash and be dried to obtain height into charcoal expansible graphite.
2, in parts by weight, 100 parts of hydroxyl values be 200mgKOH/g polytetrahydrofuran diol in be added 15 parts of height at
Charcoal expansible graphite, 5 parts of pure water, 4 parts of polysiloxanes, 6 parts of dibutyl tin dilaurates, triethylene diamine and triethanolamine
Mixture, the revolving speed of 3000 r/min is uniformly mixing to obtain polyol blends at room temperature, and it is more to add 150 parts of polymethylenes
Polyphenyl polyisocyanate is in 25oFoaming in mold is poured at a temperature of C after mixing evenly, and 80 oIt is demoulded after C curing and is
Obtain the high hard polyurethane foam fire-retardant at charcoal expansible graphite.
Embodiment 4
1, by expansible graphite EG in 80oAfter the dry 6h of C, it is added in the container equipped with stirring and accounts for expansible graphite quality
4% coupling agent NDZ-102 and dehydrated alcohol forms 90% coupling agent solution, then coupling agent is added in dry expansible graphite
The coupling agent modified expansible graphite of drying to obtain is taken out in solution and after stirring 30min；
The expansible graphite of above-mentioned modification is dispersed in dioxane, the trichlorine oxygen of expansible graphite quality 50% is added
Phosphorus, constant temperature 60oC stirs 4h, adds the thermosetting phenolic resin prepolymer of expansible graphite quality 80%, is warming up to 80oC reaction
Then 12h is down to room temperature, filter, wash and be dried to obtain height into charcoal expansible graphite.
2, in parts by weight, 100 parts of hydroxyl values be 300mgKOH/g polypropylene oxide glycol in be added 20 parts of height at
Charcoal expansible graphite, 8 parts of one fluorine dichloroethanes of hydrogen fluorochlorohydrocarbon, 4 parts of polysiloxanes, 6 parts of dibutyl tin dilaurates, triethylene two
The mixture of amine and triethanolamine, polyol blends are uniformly mixing to obtain with the revolving speed of 3000 r/min at room temperature, then plus
Enter 150 parts of methyl diphenylene diisocyanates in 25oFoaming in mold is poured at a temperature of C after mixing evenly, and 80oDemoulding obtains the high hard polyurethane foam fire-retardant at charcoal expansible graphite after C curing.
Embodiment 5
1, by expansible graphite EG in 80oAfter the dry 6h of C, it is added in the container equipped with stirring and accounts for expansible graphite quality
4% coupling agent NDZ-201 and dehydrated alcohol forms 90% coupling agent solution, then coupling agent is added in dry expansible graphite
The coupling agent modified expansible graphite of drying to obtain is taken out in solution and after stirring 30min；
The expansible graphite of above-mentioned modification is dispersed in dioxane, the trichlorine oxygen of expansible graphite quality 50% is added
Phosphorus, constant temperature 60oC stirs 4h, adds the microcrystalline cellulose of expansible graphite quality 80%, is warming up to 80oC reacts 12h, then drops
To room temperature, filtering washes and is dried to obtain height into charcoal expansible graphite.
2,15 parts of height in parts by weight, are added in the polypropylene oxide glycol that 90 parts of hydroxyl values are 450mgKOH/g into charcoal
Expansible graphite, the mixing of 5 parts of pentanes, 4 parts of polysiloxanes, 6 parts of dibutyl tin dilaurates, triethylene diamine and triethanolamine
Object is uniformly mixing to obtain polyol blends at room temperature with the revolving speed of 2800 r/min.According to the ratio by 140 parts of diphenyl methanes
Diisocyanate pours into above-mentioned polyol blends, in 24oFoaming in mold is poured at a temperature of C after mixing evenly,
And 70 oDemoulding obtains height into charcoal expansible graphite flame retardant polyurethane rigid foam after C curing.
Comparative example 1
In parts by weight, 3 parts of pure water, 3 are added in the polypropylene oxide glycol that 100 parts of hydroxyl values are 450mgKOH/g
Part polysiloxanes, 5 parts of dibutyl tin dilaurates, triethylene diamine and triethanolamine mixture at room temperature with 3000 r/
The revolving speed of min is uniformly mixing to obtain polyol blends；150 parts of methyl diphenylene diisocyanates are added in 25oIt is stirred under C
It is poured into foaming in mold after uniformly, and 80 oDemoulding obtains pure rigid polyurethane foam after C curing.
Comparative example 2
In parts by weight, 15 parts of addition is unmodified in the polypropylene oxide glycol that 100 parts of hydroxyl values are 450mgKOH/g
Expansible graphite, 3 parts of pure water, 3 parts of polysiloxanes, 5 parts of dibutyl tin dilaurates, triethylene diamine and triethanolamine
Mixture is uniformly mixing to obtain polyol blends at room temperature with the revolving speed of 3000 r/min, adds 150 parts of diphenylmethyls
Alkane diisocyanate is in 25oFoaming in mold is poured under C after mixing evenly, and 80 oI.e. obtain can for demoulding after C curing
The fire-retardant rigid polyurethane foam of expanded graphite.
Comparative example 3
1, by expansible graphite in 80oAfter the dry 6h of C, it is added in the container equipped with stirring and accounts for expansible graphite quality 4%
Coupling agent NDZ-201 and ethanol solution, form 90% coupling agent, then that coupling agent is added in dry expansible graphite is molten
The coupling agent modified expansible graphite of drying to obtain is taken out in liquid and after stirring 30min；
2, in parts by weight, in 100 parts of polypropylene oxide glycols be added 15 parts of modified expansible graphites, 3 parts of pure water,
3 parts of polysiloxanes, 3 parts of dibutyl tin dilaurates, triethylene diamine and triethanolamine mixture, at room temperature with 3000
The revolving speed of r/min is uniformly mixing to obtain polyol blends, adds 150 parts of methyl diphenylene diisocyanates in 25oIt is stirred under C
It is poured into foaming in mold after mixing uniformly, and 80 oDemoulding obtains the fire-retardant poly- ammonia of modified expansible graphite after C curing
Ester rigid foam.
The test data of the polyurethane foam plastics prepared in the various embodiments described above of the invention is to measure as follows
:
The apparent density of foam is tested according to GB/T 6343-2009, and batten is having a size of 50 × 50 × 50 mm3。
Compression performance is tested according to GB/T 8813-2008.50 × 50 × 30 mm of batten size3.Compression speed is 3 mm/
Min, compressive deformation 15%.
The bending property of rigid foam is tested according to GB/T 8812-2007,120 × 25 × 20 mm of batten size3,
Load pressure is pressed with the speed of 10mm/min.
Limit oxygen index (LOI) is according to ASTM D2863 standard in (the Chinese Jiangning instrument analysis of HC-2 type oxygen index instrument
Company production) on tested, batten is having a size of 150 × 10 × 10 mm3。
Heat release rate (KW/m2) and burning time (s) by conic heat meter (Stanton Redcroft company of Britain)
Test is obtained according to ISO5600 standard test.Sample is cut into 100 × 100 × 25 mm3Size.When test, instrument is set
Radiation heat flux be 35 kW/m2。
700oC neat coal amout is carried out in TGA Q5000 IR thermal analyzer (TA company of the U.S.), temperature elevating range 30-
700oC, heating rate 20oC/min, air velocity are 100 ml/min, and the atmosphere of gas is oxygen.
The performance test of table 1, polyurethane foam plastics
| 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 |
| Heat release rate (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 |
Can be learnt by upper table test result: comparative example 1 is pure foam plastics, and comparative example 2 be addition it is unmodified can
Expanded graphite, the compressive strength and bending strength of the foam in comparative example 2 have dropped 32%, 29% compared with 1 pure foam of comparative example；And it is right
It is to prepare flame-retardant foam using only the expansible graphite of coupling agent surface treatment in ratio 3, is compared though mechanical property compares
Example 2 slightly improves, but still than the poor mechanical property of 1 pure foam of comparative example.
Embodiment 1-5 and comparative example 2-3 comparison is known, since the present invention is using the expansible graphite Jing Guo graft modification
Come the hard polyurethane foam prepared, mechanical property such as compressive strength and bending strength are improved, and relatively compare
1 pure foam of example；The expansible graphite (embodiment 3 and embodiment 5) of 15% graft modification is wherein added than unmodified (comparative example
2) oxygen index (OI) of the foam and only prepared with the expansible graphite of coupling agent modified (comparative example 3) slightly improves, heat release rate
It being substantially reduced, burning time is postponed obviously, and 700 oC neat coal amout is also because the upper height of grafting is largely mentioned at the resin and fiber of charcoal
Height, flame retardant property greatly improve.
This hair can be understood and applied the above description of the embodiments is intended to facilitate those skilled in the art
It is bright.Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein
General Principle is applied in other embodiments without having to go through creative labor.Therefore, the present invention is not limited to implementations here
Example, those skilled in the art's announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be
Within protection scope of the present invention.
Claims (9)
1. a kind of high at charcoal expansible graphite, it is characterised in that: be that height is passed through chemical modification simultaneously at the resin or cellulose of charcoal
It is grafted to expansible graphite surface, is prepared by following steps:
(1) coupling agent modified expansible graphite
Coupling agent is dissolved in dehydrated alcohol and forms coupling agent solution, then coupling agent solution is added in dry expansible graphite
Middle stirring 15-30min, finally dry coupling agent modified expansible graphite；The dosage of the coupling agent is expansible graphite
The 2-4% of quality；
(2) graft modification expansible graphite
The expansible graphite of above-mentioned modification is dispersed in dioxane, the trichlorine oxygen for accounting for expansible graphite quality 30-50% is added
Phosphorus, constant temperature stir 2-4h, add the height for accounting for expansible graphite quality 40-80% into charcoal substance, are warming up to 60-80 DEG C of reaction 5-
Then 12h is down to room temperature, filter, wash and be dried to obtain height into charcoal expansible graphite；
The height is one of thermosetting phenolic resin prepolymer or microcrystalline cellulose at charcoal substance.
2. height according to claim 1 is at charcoal expansible graphite, it is characterised in that: the partial size of the expansible graphite is
0.18-0.30mm；The expansible graphite of the drying is by expansible graphite in 60-80 DEG C of dry 4-6h gained.
3. height according to claim 1 is at charcoal expansible graphite, it is characterised in that: the coupling agent is titanate coupling agent
It is isopropyl three (dioctyl phosphoric acid acyloxy) titanate esters, isopropyl three (dioctylphyrophosphoric acid acyloxy) titanate esters, silane coupled
One of agent gamma-aminopropyl-triethoxy-silane, γ-glycidyl ether oxypropyltrimethoxysilane；The coupling agent
The mass percent concentration of solution is 90%.
4. a kind of described in any item high height at charcoal expansible graphite of 1-3 containing claim are at the fire-retardant poly- ammonia of charcoal expansible graphite
Ester rigid foam, it is characterised in that: be prepared by weight by following components:
80-100 parts of polyether polyol,
120-150 parts of polyisocyanate compound,
Height at 5-20 parts of charcoal expansible graphite,
3-8 parts of foaming agent,
2-4 parts of foaming stabiliser,
3-6 parts of kicker.
5. height according to claim 4 is at charcoal expansible graphite flame retardant polyurethane rigid foam plastics, it is characterised in that: institute
Stating polyether polyol is the polyether polyol that hydroxyl value is 200-500mgKOH/g and Weighted Average Functionality is 2-4.
6. height according to claim 4 is at charcoal expansible graphite flame retardant polyurethane rigid foam plastics, it is characterised in that: institute
The polyisocyanate compound stated is selected from aromatic polyisocyanate, aliphatic polyisocyante or alicyclic polyisocyanates
At least one of.
7. height according to claim 4 is at charcoal expansible graphite flame retardant polyurethane rigid foam plastics, it is characterised in that: institute
The foaming agent stated is one of pure water, one fluorine dichloroethanes of hydrogen fluorochlorohydrocarbon or pentane.
8. height according to claim 4 is at charcoal expansible graphite flame retardant polyurethane rigid foam plastics, it is characterised in that: institute
The foaming stabiliser stated is polysiloxanes；The kicker is dibutyl tin dilaurate, triethylene diamine and three second
The mixture of hydramine.
9. a kind of high preparation method at charcoal expansible graphite flame retardant polyurethane rigid foam plastics as claimed in claim 4,
It is characterized by comprising following steps:
(1) by weight in 80-100 parts of polyether polyol be added 5-20 part height at charcoal expansible graphite, 3-8 parts of foaming agents,
2-4 parts of foaming stabilisers and 3-6 parts of kickers, are uniformly mixing to obtain at room temperature with the revolving speed of 2500-3000 r/min
Polyol blends；
(2) 120-150 parts of polyisocyanate compounds are poured into above-mentioned polyol blends, is stirred at a temperature of 23-25 DEG C
Be poured into foaming in mold after uniformly, and after 65-80 DEG C of curing demoulding obtain it is high fire-retardant at charcoal expansible graphite
Polyurethane rigid foam plastic.
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