CN104130368A - Flame-retardant polyurethane cast rigid foamed plastic sheet - Google Patents

Flame-retardant polyurethane cast rigid foamed plastic sheet Download PDF

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CN104130368A
CN104130368A CN201410347900.3A CN201410347900A CN104130368A CN 104130368 A CN104130368 A CN 104130368A CN 201410347900 A CN201410347900 A CN 201410347900A CN 104130368 A CN104130368 A CN 104130368A
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flame retardant
glycol
polyol component
component
polyol
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CN104130368B (en
Inventor
王磊
窦忠山
王炳凯
王耀西
余郁
潘振勇
李坤
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Wanhua Energysav Science and Technology Group Co Ltd
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Wanhua Energysav Science and Technology Group Co Ltd
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    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
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    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
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    • C08G18/4205—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups
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    • C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
    • C08G18/4244—Polycondensates having carboxylic or carbonic ester groups in the main chain containing oxygen in the form of ether groups
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    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
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    • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
    • C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
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  • Polymers & Plastics (AREA)
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  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Polyurethanes Or Polyureas (AREA)

Abstract

The invention relates to a flame-retardant polyurethane cast rigid foamed plastic sheet, and belongs to the field of polyurethane polyurethane cast rigid foamed plastic sheets. The sheet is formed by polymerizing an isocyanate component and a polyol component, and a mass ratio of the isocyanate component to the polyol component is (140-200):100. The polyol component comprises 10-40wt% of polyester polyol, 5-40wt% of a reactive flame retardant, 10-30wt% of inorganic particles and 22-52wt% of an assistant. The sheet is obtained through the steps of uniformly mixing the isocyanate component with the polyol component through an electric or pneumatic stirring device and cast-molding through a polyurethane casting machine. The sheet has an excellent flame retardant performance, and can meet the requirements of national standard GB8624-2012 Building Material and Product Combustion Performance Grading plate plate-shaped building material and product combustion performance grading and grading criterion B grade flame retardant materials.

Description

A kind of flame retardant polyurethane cast rigid foam sheet material
Technical field
The present invention relates to a kind of flame retardant polyurethane cast rigid foam sheet material.
Background technology
Polyurethane rigid foam plastic (hard bubbling) is by rigid-foam polyether polyol (hard polyurethane foam combined polyether claims again white material), react with polymeric MDI (claiming again black material) preparation.Mainly for the preparation of rigid urethane foam, be widely used in the fields such as refrigerator, freezer, spraying, sun power, heating pipeline, building.
Polyurethane rigid foam plastic has excellent physics and heat preservation and insulation:
1, thermal conductivity is lower than building heat preservation lagging materials such as rock wool, glass wool, styrofoam, extruded sheets, and electric energy is high;
2, lightweight, reduce load;
3, the good water resistance of tool, insulation, waterproof unite two into one;
4, simplicity of design, efficiency is high, progress is fast, quality is good, the life-span is long;
5, urethane is inert material, does not react, and be not the food source of insects and rodent with bronsted lowry acids and bases bronsted lowry, can keep material character and heat-insulating property constant.
The moulding process of hard polyurethane foam is generally divided into spraying and pours into a mould two kinds; Spraying is to use polyurethane coating machine that polyurethane bicomponent raw material is directly sprayed with tiny vaporific drop form, is coated on body surface, and material fast foaming expands and solidifies, and forms the hard polyurethane foam thermal insulation layer consistent with base shape.The most outstanding feature is the base material for different shape, no matter be that plane, facade or end face can directly be implemented pouring foaming, does not need mould.
Cast is to be poured in mould after using the equipment such as polyurethane casting machine or electronic, pneumatic stirring that isocyanate component and polyol component are evenly mixed, and after heat-insulation pressure keeping for some time in mould, takes out and obtains the goods that hard bubble.Contrast is coated with following major advantage:
1, can factory's serialization produce, quality product is easily controlled;
2, produce and be not subject to the weather effect such as temperature, wind-force, all can carry out throughout the year;
3, compare spraying, the material loss of splashing is few, construction environment is polluted few;
4, can the thicker skinning of need of production, complex-shaped various sheet material or lines;
5, isocyanate component and polyol component blending ratio are can setting range more flexible.
But hard polyurethane foam belongs to organism after all, also there is a big difference with respect to inorganic materials such as rock wool, glass wool, pearlstones for the flame retardant properties of itself, along with the repeatedly generation of organic insulation material fire failure, people are also more and more stricter to its fire-retardant index request.
In burning behavior class to tabular material of construction and goods in GB GB8624-2012 " material of construction and goods classification system for fire performance " and grading criteria, nonflammable material B level requires:
At present the fire-retardant also few people of B level reach, and particularly wherein GB/T20284 monomer combustion test requires: the requirement that burning rate of rise index is less than 120W/s almost nobody can reach.
Summary of the invention
The object of the invention is to: solve the cast polyurethane weak point of sheet material aspect fire-retardant of hard bubbling, the flame retardant polyurethane cast rigid foam sheet material that in burning behavior class that one meets GB GB8624-2012 " material of construction and goods classification system for fire performance " tabular material of construction and goods and grading criteria, nonflammable material B level requires is provided.
Technical solution of the present invention is:
A kind of flame retardant polyurethane cast rigid foam sheet material, is polymerized by isocyanate component and polyol component, and its special character is:
Described isocyanate component and polyol component mass ratio are (140-200): 100; Described polyol component comprises polyester polyol, hydroxyl reactive flame retardant, inorganic particles and auxiliary agent; Described reactive flame retardant accounts for the 10-40% of polyol component gross weight; Described polyester polyol accounts for the 5-40% of polyol component gross weight; Described inorganic particles accounts for the 10-30% of polyol component gross weight; Described auxiliary agent accounts for the 22-52% of polyol component gross weight.
A kind of another kind formula of flame retardant polyurethane cast rigid foam sheet material: isocyanate component and polyol component mass ratio are (140-200): 100; Polyol component comprises polyester polyol, hydroxyl reactive flame retardant, auxiliary agent, and the per-cent that these raw materials account for polyol component total mass is: polyester polyol 6-57%, hydroxyl reactive flame retardant 12-57%, auxiliary agent 22-52%; Isocyanate component comprises poly methylene poly phenyl poly isocyanate and inorganic particles, and the per-cent that accounts for isocyanate component gross weight is, poly methylene poly phenyl poly isocyanate 70-90%, inorganic particles 10-30%.
Above-mentioned polyester polyol is the polyester polyol being obtained by least one polycondensation at least one and ethylene glycol in phthalic anhydride, phthalic acid, propylene glycol, butyleneglycol, pentanediol, hexylene glycol, glycol ether, dipropylene glycol, glycerol, hexanetriol, TriMethylolPropane(TMP), hexamethylolmelamine.The polyester polyol that the trade mark that for example Si Taipan Chemical Co., Ltd. in Nanjing, Nanjing produces is PS-3152, the polyester polyol that the trade mark that Jiangsu Fu Sheng novel material company limited produces is CF-6255.The present invention selects the polyester polyol of high phenyl ring content; do not use conventional glycol ether or glycerine and sucrose or quadrol and sucrose to add the polyether glycol that oxyethane and/or Polymerization of Propylene Oxide form; its principle is the content of inflammable-CH2-segment during minimizing is hard bubbled; increase phenyl ring content; phenyl ring easily forms carbonization protective layer in burning, has protection foam inside to avoid the effect that flame is attacked.And find in our experiment, inflammable in hard bubbling-CH2-segment content is fewer, and phenyl ring content is higher, is more conducive to the formation of carbonization protective layer, and flame retardant effect is better.
Above-mentioned auxiliary agent comprises pneumatogen, foam surface activity agent, catalyzer, liquid organic fire-retardant and water; In auxiliary agent, the quality consumption of each component accounts for the per-cent of polyol component total mass and is:
Above-mentioned reactive flame retardant is the compound that contains hydroxyl, and contains at least one element in halogen element, phosphoric, nitrogen element.Reactive flame retardant contain can with the hydroxyl of isocyanate reaction, compare with the liquid organic fire-retardant of hydroxyl not, not only play fire retardation, and there is no plastification.The reactive flame retardant that contains more than 2 hydroxyl can also increase the degree of crosslinking of hard bubbling, replace conventional glycol ether or glycerine or quadrol and sucrose to add the polyether glycol that oxyethane and/or Polymerization of Propylene Oxide form, not only obtain higher foamy body, can also reduce the content of inflammable in hard bubbling-CH2-segment.
Above-mentioned reactive flame retardant is Manny alkene polyvalent alcohol or nitrogenous/phosphorus/halogen polyether glycol or PHT4 glycol.Manny alkene polyvalent alcohol be phenols, formaldehyde, diethanolamine polymerization obtain polyvalent alcohol; Described phenols is at least one in phenol, Resorcinol, propyl phenoxy, butylphenol, amylic phenol, heptyl phenol, octyl phenol, nonyl phenol and decyl phenol, as R2470M (ten thousand Huarong's prestige urethane company limiteds); Nitrogenous/phosphorus/halogen polyether glycol is to add with nitrogenous/phosphorus/halogen oxy-compound the polyether glycol that contains nitrogen/phosphorus/halogen in the molecule that oxyethane and/or propylene oxide and/or epoxy chloropropane is polymerized, as Fr-130 (ten thousand Huarong's prestige urethane company limiteds); PHT4 glycol is the polyester polyol that at least one polycondensation in tetrabromophthalate or PHT4 and ethylene glycol, propylene glycol, butyleneglycol, pentanediol, hexylene glycol, glycol ether, dipropylene glycol obtains, as Saytex RB-79 (the Albemarle Corporation in USA of Albemarle Corporation of the U.S.).
Above-mentioned inorganic particles refers to fireproof inorganic thing, such as at least one in aluminium hydroxide, magnesium hydroxide, calcium carbonate, antimonous oxide, zinc borate particulate, and preferably aluminium hydroxide.When using the mixing equipment such as electronic, pneumatic stirring to the not requirement of inorganic particles particle diameter, when using the mixing equipment such as low pressure, high pressure polyurethane casting machine, inorganic particles is less than 500 orders corresponding adjustment raw material aperture of filter screen, preferentially adopts the high pressure casting molding machine of cylinder volume pump or toothed gear pump or plunger metering pump to mix.Inorganic particles not only itself has fire retardation; and and the reactive flame retardant and the liquid organic fire-retardant that contain halogen, phosphorus, nitrogen element there is good flame retardant synergistic effect, the carbonization protective layer easily forming in can foam burning is protected together foam inside to avoid flame and is attacked.
Aforesaid liquid organic fire-retardant is hydroxyl not, for phosphoric acid ester and/or halogenated phosphate class organic compound, at least one in preferable methyl dimethyl phosphate, three (2-chloropropyl) phosphoric acid ester, three (2-chloroethyl) phosphoric acid ester and ethyl phosphonic acid diethyl ester.
Above-mentioned foam surface activity agent is silicone oil, and silicone oil is polydimethylsiloxane, the silicone oil that the trade mark that the silicone oil that the trade mark that silicone oil can adopt Mitugao New Material Group to produce is L6950 or Jiangsu Maysta Chemical Co., Ltd. produce is AK8803;
Above-mentioned catalyzer is tertiary amine catalyst and organo-metallic salt catalyzer; Described tertiary amine catalyst comprises pentamethyl-diethylenetriamine, N, N-dimethylcyclohexylamine, triethylene diamine, triethylamine, 1,4-lupetazin, N, at least one in N-dimethyl benzylamine and two dimethylamino ethyl ether, described organo-metallic salt catalyzer comprises at least one in isocaprylic acid potassium, formic acid quaternary ammonium salt, Potassium ethanoate, dibutyl tin laurate, stannous octoate, dibutyltin diacetate and potassium oleate;
Above-mentioned pneumatogen is the chloro-1-fluoroethane of 1,1-bis-, 1,1,1,3,3-pentafluoropropane, 1,1,1,3, at least one in 3-3-pentafluorobutane and 1,1,1,2-tetrafluoro butane;
Above-mentioned isocyanate component is poly methylene poly phenyl poly isocyanate.The poly methylene poly phenyl poly isocyanate that the trade mark that the preferred Wanhua Chemical Group Co., Ltd. of this poly methylene poly phenyl poly isocyanate produces is PM-200.
Above-mentioned inorganic particles can also only add in isocyanate component, and addition is no more than 30% of polyol component total mass; Described inorganic particles can also add in isocyanate component simultaneously, and while adding in isocyanate component, addition is no more than 30% of polyol component total mass.
In above-mentioned pair of component raw material, can also add the mill base that occupies polyol component total mass 0.1-2%, can add to arbitrarily in isocyanate component or polyol component.The trade mark that described mill base can adopt Bao Meishi chemical industry (Shanghai) Co., Ltd. to produce is the mill base of 126-3M1665,036-2M1941, or the trade mark that adopts Guangzhou Merck Chemical Co., Ltd. to produce is at least one in P89855, P89750, P89856 mill base.
The present invention is in order to increase the flame retardant resistance of cast polyurethane rigid foam, start with from three aspects:: reduce on the one hand the content of inflammable-CH2-segment hard bubbling, do not use conventional glycol ether or glycerine or quadrol and sucrose to add the polyether glycol that oxyethane and/or Polymerization of Propylene Oxide form; The reactive flame retardant that use contains phosphorus bromine ignition-proof element on the other hand and the polyester polyol of high phenyl ring content; Finally use incombustible substance inorganic particles, add in isocyanate component or polyol component, increase flame retardant properties.By this three aspects:, we have obtained meeting nonflammable material B level requirement in the burning behavior class to tabular material of construction and goods and grading criteria in GB GB8624-2012 " material of construction and goods classification system for fire performance ".
A kind of flame retardant polyurethane cast rigid foam sheet material of the present invention, the shape of its end article depends on the shape that uses mould in production, can use the flame retardant polyurethane cast rigid foamed article of the various different decorative patterns of different die production, moulding, size.If such as using spherical module, can obtain the flame retardant polyurethane cast rigid foamed article of ball-type.
The production method of the above-mentioned flame retardant polyurethane cast of preparation of the present invention rigid foam sheet material is: use polyurethane casting machine or electric stirring equipment or pneumatic stirring equipment that isocyanate component and polyol component are evenly poured in mould after mixing, in mould, after heat-insulation pressure keeping for some time, take out and obtain the goods that hard bubble.
The invention has the beneficial effects as follows:
(1) flame retardant polyurethane of the present invention cast rigid foam sheet material has excellent flame retardant properties: can meet nonflammable material B level requirement in the burning behavior class of GB GB8624-2012 " material of construction and goods classification system for fire performance " tabular material of construction and goods and grading criteria.
(2) flame retardant polyurethane cast rigid foam sheet material of the present invention is applicable to the fire-retardant Application Areass such as high construction wall, roofing, ground insulating that require.
Embodiment
Further illustrate embodiment of the present invention below in conjunction with embodiment, but the invention is not restricted to listed embodiment, also should be included in other any known change in interest field of the presently claimed invention.
Embodiment 1
Isocyanate component and polyol component mass ratio are 140:100.
Polyol component:
Isocyanate component is selected poly methylene poly phenyl poly isocyanate PM-200 (Wanhua Chemical Group Co., Ltd.) 90wt%, aluminum hydroxide particle (320 order) 10wt%;
Production stage:
(1) 4*1.2*0.6 sized blocks bubble mould is coated to releasing agent;
(2) by polyol component pre-mixing, more than mechanical stirring 5min;
(3) step (2) gains are steeped to machine (Hebei Xianghe giant dragon foam mechanical company limited) with isocyanate component by case and fully mix, 140kg is in mould in cast;
(4) matched moulds, waits for 12 hours, and piece takes out after steeping abundant slaking;
(5) use pingqie machine that piece bubble is cut into 2-20cm thickness sheet material.
Made sheet material color is even grey, and various performances are as follows:
Reach nonflammable material B level requirement in the burning behavior class of GB GB8624-2012 " material of construction and goods classification system for fire performance " tabular material of construction and goods and grading criteria.
Embodiment 2
Isocyanate component and polyol component mass ratio are 160:100;
Polyol component:
Isocyanate component: poly methylene poly phenyl poly isocyanate PM-200 (Wanhua Chemical Group Co., Ltd.) 82wt%, magnesium hydroxide particulate (200 order) 18wt%;
Production stage:
(1) 1.2*0.6*0.03m baseboard timber die is used to circulating water heating to 45 DEG C, and coat releasing agent;
(2) by polyol component pre-mixing, more than mechanical stirring 0.5min;
(3) step (2) gains are fully mixed by electronic, the manual stirring of pneumatic stirring with isocyanate component, 1270g is in mould in cast;
(4) board mould of closing immediately, takes out after waiting for the abundant slaking of 20min sheet material.
Reach nonflammable material B level requirement in the burning behavior class of GB GB8624-2012 " material of construction and goods classification system for fire performance " tabular material of construction and goods and grading criteria.
Embodiment 3
Isocyanate component and polyol component mass ratio are 160:100;
Polyol component:
Isocyanate component: poly methylene poly phenyl poly isocyanate PM-200 (Wanhua Chemical Group Co., Ltd.);
Production stage:
(1) polyurethane plate tinuous production press is heated to 55 DEG C;
(2) then the preheating of upper and lower surface coiled material and guide to press inside;
(3) by polyol component pre-mixing, more than mechanical stirring 10min;
(4) start press;
(5) step (3) gains are mixed by low-pressure casting machine (Zhenjiang Ao Li urethane Machinery Co., Ltd.) with isocyanate component, be evenly poured on last volume face;
(6) adjust press walking speed, remain on 4-6m/min, produce continuously.
Made sheet material color is for evenly faint yellow, and various physicalies are as follows:
Embodiment 4
Isocyanate component and polyol component mass ratio are 140:100.
Polyol component:
Isocyanate component is selected poly methylene poly phenyl poly isocyanate PM-200 (Wanhua Chemical Group Co., Ltd.) 80wt%, aluminum hydroxide particle (320 order) 20wt%;
Production stage:
(1) 4*1.2*0.6 sized blocks bubble mould is coated to releasing agent;
(2) by polyol component pre-mixing, more than mechanical stirring 5min;
(3) step (2) gains are steeped to machine (Hebei Xianghe giant dragon foam mechanical company limited) with isocyanate component by case and fully mix, 140kg is in mould in cast;
(4) matched moulds, waits for 12 hours, and piece takes out after steeping abundant slaking;
(5) use pingqie machine that piece bubble is cut into 2-20cm thickness sheet material.
Made sheet material color is even grey, and various performances are as follows:
Reach nonflammable material B level requirement in the burning behavior class of GB GB8624-2012 " material of construction and goods classification system for fire performance " tabular material of construction and goods and grading criteria.
Embodiment 5
Isocyanate component and polyol component mass ratio are 160:100;
Polyol component:
Isocyanate component: poly methylene poly phenyl poly isocyanate PM-200 (Wanhua Chemical Group Co., Ltd.) 70wt%, magnesium hydroxide particulate (200 order) 30wt%;
Production stage:
(1) 1.2*0.6*0.03m baseboard timber die is used to circulating water heating to 45 DEG C, and coat releasing agent;
(2) by polyol component pre-mixing, more than mechanical stirring 0.5min;
(3) step (2) gains are fully mixed by electronic, the manual stirring of pneumatic stirring with isocyanate component, 1270g is in mould in cast;
(4) board mould of closing immediately, takes out after waiting for the abundant slaking of 20min sheet material.
Made sheet material color is even grey, and various performances are as follows:
Reach nonflammable material B level requirement in the burning behavior class of GB GB8624-2012 " material of construction and goods classification system for fire performance " tabular material of construction and goods and grading criteria.
The product of above embodiment has higher ultimate compression strength and excellent flame retardant properties, and flame retardant level reaches the fire-retardant requirement of B level in GB/T8624-2012.This sheet material can be advantageously used in the hard polyurethane foams field of the field of thermal insulation such as skin, roof, ground.

Claims (10)

1. a flame retardant polyurethane cast rigid foam sheet material, is polymerized by isocyanate component and polyol component, it is characterized in that:
Described isocyanate component and polyol component mass ratio are (140-200): 100;
Described polyol component comprises polyester polyol, hydroxyl reactive flame retardant, inorganic particles and auxiliary agent, the per-cent that these raw materials account for polyol component total mass is: polyester polyol 5-40%, hydroxyl reactive flame retardant 10-40%, inorganic particles 10-30%, auxiliary agent 22-52%.
2. flame retardant polyurethane cast rigid foam sheet material according to claim 1, is characterized in that:
Described polyester polyol is the polyester polyol being obtained by least one polycondensation at least one and ethylene glycol in phthalic anhydride, phthalic acid, propylene glycol, butyleneglycol, pentanediol, hexylene glycol, glycol ether, dipropylene glycol, glycerol, hexanetriol, TriMethylolPropane(TMP), hexamethylolmelamine.
3. flame retardant polyurethane cast rigid foam sheet material according to claim 1 and 2, is characterized in that:
Described auxiliary agent comprises pneumatogen, foam surface activity agent, catalyzer, liquid organic fire-retardant and water, and in auxiliary agent, the quality consumption of each component accounts for the per-cent of polyol component total mass and is:
4. flame retardant polyurethane cast rigid foam sheet material according to claim 3, is characterized in that: described hydroxyl reactive flame retardant contains at least one element in halogen element, phosphoric, nitrogen element; Described reactive flame retardant is any of Manny alkene polyvalent alcohol or nitrogenous/phosphorus/halogen polyether glycol or PHT4 glycol;
Manny alkene polyvalent alcohol is the polyvalent alcohol that phenols, formaldehyde, diethanolamine and Polymerization of Propylene Oxide form; Described phenols is at least one in phenol, Resorcinol, propyl phenoxy, butylphenol, amylic phenol, heptyl phenol, octyl phenol, nonyl phenol and decyl phenol;
Nitrogenous/phosphorus/halogen polyether glycol is to add with nitrogenous/phosphorus/halogen oxy-compound the polyether glycol that contains nitrogen/phosphorus/halogen in the molecule that oxyethane and/or propylene oxide and/or epoxy chloropropane is polymerized;
PHT4 glycol is the polyester polyol that at least one polycondensation in tetrabromophthalate or PHT4 and ethylene glycol, propylene glycol, butyleneglycol, pentanediol, hexylene glycol, glycol ether, dipropylene glycol obtains.
5. flame retardant polyurethane cast rigid foam sheet material according to claim 4, is characterized in that: described inorganic particles comprises at least one in aluminium hydroxide, magnesium hydroxide, calcium carbonate, antimonous oxide, zinc borate particulate.
6. flame retardant polyurethane cast rigid foam sheet material according to claim 5, is characterized in that:
Not hydroxyl of described liquid organic fire-retardant is phosphoric acid ester and/or halogenated phosphate class organic compound;
Described foam surface activity agent is silicone oil, and silicone oil is polydimethylsiloxane;
Described catalyzer is tertiary amine catalyst and organo-metallic salt catalyzer; Described tertiary amine catalyst comprises pentamethyl-diethylenetriamine, N, N-dimethylcyclohexylamine, triethylene diamine, triethylamine, 1,4-lupetazin, N, at least one in N-dimethyl benzylamine and two dimethylamino ethyl ether, described organo-metallic salt catalyzer comprises at least one in isocaprylic acid potassium, formic acid quaternary ammonium salt, Potassium ethanoate, dibutyl tin laurate, stannous octoate, dibutyltin diacetate and potassium oleate;
Described pneumatogen is the chloro-1-fluoroethane of 1,1-bis-, 1,1,1,3,3-pentafluoropropane, 1,1,1,3, at least one in 3-3-pentafluorobutane and 1,1,1,2-tetrafluoro butane;
Described isocyanate component is poly methylene poly phenyl poly isocyanate.
7. flame retardant polyurethane cast rigid foam sheet material according to claim 6, is characterized in that: described inorganic particles can also add in isocyanate component simultaneously, and addition is no more than 30% of polyol component total mass.
8. flame retardant polyurethane cast rigid foam sheet material according to claim 7, is characterized in that: in described polyol component or isocyanate component, also comprise the mill base that accounts for polyol component total mass 0.1-2%.
9. a flame retardant polyurethane cast rigid foam sheet material, is polymerized by isocyanate component and polyol component, it is characterized in that:
Described isocyanate component and polyol component mass ratio are (140-200): 100;
Described polyol component comprises polyester polyol, hydroxyl reactive flame retardant, auxiliary agent, and the per-cent that these raw materials account for polyol component total mass is: polyester polyol 6-57%, hydroxyl reactive flame retardant 12-57%, auxiliary agent 22-52%;
Described isocyanate component comprises poly methylene poly phenyl poly isocyanate and inorganic particles, and the per-cent that accounts for isocyanate component gross weight is, poly methylene poly phenyl poly isocyanate 70-90%, inorganic particles 10-30%.
10. flame retardant polyurethane spray-on rigid foam plastics according to claim 9, is characterized in that: described hydroxyl reactive flame retardant is at least one in Manny alkene polyvalent alcohol or nitrogenous/phosphorus/halogen polyether glycol or PHT4 glycol.
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