CN105461895B - Combined polyether, polyisocyanurate foam and its feedstock composition and preparation method - Google Patents

Combined polyether, polyisocyanurate foam and its feedstock composition and preparation method Download PDF

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CN105461895B
CN105461895B CN201510979798.3A CN201510979798A CN105461895B CN 105461895 B CN105461895 B CN 105461895B CN 201510979798 A CN201510979798 A CN 201510979798A CN 105461895 B CN105461895 B CN 105461895B
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polyether
polyester polyol
polyol
catalyst
component
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CN105461895A (en
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董建国
信延垒
王青林
许景龙
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SHANGHAI DONGDA POLYURETHANE CO Ltd
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SHANGHAI DONGDA POLYURETHANE CO Ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • 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
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
    • C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
    • C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
    • C08G18/4018—Mixtures of compounds of group C08G18/42 with compounds of group C08G18/48
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—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
    • 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
    • C08J9/143—Halogen containing compounds
    • C08J9/144—Halogen containing compounds containing carbon, halogen and hydrogen only
    • C08J9/146—Halogen containing compounds containing carbon, halogen and hydrogen only only fluorine as halogen atoms
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/49—Phosphorus-containing compounds
    • C08K5/51—Phosphorus bound to oxygen
    • C08K5/52—Phosphorus bound to oxygen only
    • C08K5/521—Esters of phosphoric acids, e.g. of H3PO4
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2110/00—Foam properties
    • C08G2110/0025—Foam properties rigid
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2110/00—Foam properties
    • C08G2110/0041—Foam properties having specified density
    • C08G2110/005—< 50kg/m3
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
    • C08J2203/142—Halogenated saturated hydrocarbons, e.g. H3C-CF3
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2205/00—Foams characterised by their properties
    • C08J2205/10—Rigid foams
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04—Polyurethanes
    • C08J2375/06—Polyurethanes from polyesters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2475/04—Polyurethanes
    • C08J2475/08—Polyurethanes from polyethers

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Polyurethanes Or Polyureas (AREA)

Abstract

The invention discloses a kind of combined polyether, polyisocyanurate foam and its feedstock composition and preparation methods.The combined polyether of the present invention comprising following each component：Polyether polyol A, polyester polyol A, foam stabiliser, catalyst for trimerization, foaming agent, water and fire retardant；The foaming agent is fluorination hydrocarbon blowing agents；The fluorination hydrocarbon blowing agents are 1,1,1,3,3- pentafluoropropane and/or 1,1,1,3,3- 3-pentafluorobutane.The polyisocyanurate foam of the present invention can reach fire propagation index≤25 and flue gas growth indices≤450, therefore the polyisocyanurate foam of the present invention reaches under conditions of without using HCFC-141b foaming agents《National Fire Protection committee life security bill》It is required that the thermal insulation material for skyscraper and corridor flame-retardancy requirements.

Description

Combined polyether, polyisocyanurate foam and its feedstock composition and preparation method
Technical field
Present invention relates particularly to a kind of combined polyether, polyisocyanurate foam and its feedstock composition and preparation methods.
Background technology
Polyurethane foam plastics is high-molecular organic material, is combustible material, once it catches fire, since surface area is big and thermal conductivity Rate is low, and material is easy burning and is not easy self-extinguishment.In order to make foamed plastics reach ideal anti-flammability, except need add fire retardant Outside, also need amino structure being modified as urea groups structure, make the molecular structure of foam by it is polyurethane-modified be poly-isocyanurate.Mesh Before, the poly-isocyanurate of domestic production, it is physical blowing agent mostly to use HCFC-141b, while using a large amount of resistance of addition It is fire-retardant to achieve the purpose that fire agent；Although bubble obtained has higher oxygen index (OI), flue gas growth indices are very high, and one As be more than 450.Transitional substitute products of the HCFC-141b as F-11, the performance of product is very close to F-11, but it is still deposited In the latent value of ozone-depleting, while also there is higher greenhouse effect value (GWP value)；Therefore, in developed country, HCFC-141b has forbidden It uses.
Therefore, there is an urgent need for a kind of high fire-retardance of exploitation, the polyisocyanurate foam compositions of environmental protection.
Invention content
The technical problem to be solved by the present invention is in order to overcome polyisocyanurate foam anti-flammability and ring in the prior art The bad defect of guarantor property, and provide a kind of combined polyether, polyisocyanurate foam and its feedstock composition and preparation side Method.The polyisocyanurate foam of the present invention can be under conditions of without using HCFC-141b foaming agents, according to American Standard ASTM E84-14《Building material surface combustion characteristic test method》When being detected, fire propagation index≤25 can be reached and flue gas increases Long index≤450, therefore the polyisocyanurate foam of the present invention reaches《National Fire Protection committee life security bill》 It is required that the thermal insulation material for skyscraper and corridor flame-retardancy requirements.
One of technical scheme of the present invention：
The present invention provides a kind of combined polyethers comprising each component of following parts by weight：0~4 part of polyether polyol A, 6~10 parts of polyester polyol A, 0.3~0.5 part of foam stabiliser, 0.2~0.4 part of catalyst for trimerization, 2~3 parts of foaming agents, 0.2~0.3 part of water and 1~3 part of fire retardant；
The polyether polyol A be viscosity be 5000-7000Pas, degree of functionality is 5.0 ± 0.3 and hydroxyl value be 420- The polyether polyol of 460mgKOH/g；
The polyester polyol A be viscosity be 6500-11500Pas, degree of functionality is 2.2 ± 0.2 and hydroxyl value be 260- The polyester polyol of 270mgKOH/g；
The viscosity of the polyether polyol A and polyester polyol A is 25 DEG C of dynamic viscosity；
The foaming agent is fluorination hydrocarbon blowing agents；The fluorination hydrocarbon blowing agents are the (letter of 1,1,1,3,3- pentafluoropropane Claim HFC-245fa) and/or 1,1,1,3,3- 3-pentafluorobutane (abbreviation HFC-365mfc).
Preferably, the combined polyether, is made of each component of following parts by weight：0~4 part of polyether polyol A, 6~10 parts of polyester polyol A, 0.3~0.5 part of foam stabiliser, 0.2~0.4 part of catalyst, 2~3 parts of foaming agents, 0.2~ 0.3 part of water and 1~3 part of fire retardant.
Preferably, the moisture of the polyether polyol A is less than 0.1%, percentage is in the polyether polyol A The quality of water accounts for the percentage of the polyether polyol A gross masses.Preferably, the number-average molecular weight of the polyether polyol A is 660-700.More preferably, the polyether polyol A is the polyethers for the model SD4110 that Shanghai Dongda Chemical Co., Ltd. generates Polyalcohol.
Preferably, the moisture of the polyester polyol A is less than 0.1%, percentage is in the polyester polyol A The quality of water accounts for the percentage of the polyester polyol A gross masses.Preferably, the number-average molecular weight of the polyester polyol A is 460-390.Preferably, the acid value of the polyester polyol A is less than 1mgKOH/g.More preferably, the polyester polyol A is South Korea The polyester polyol for the model AK7004 that Ai Jing Chemical Co., Ltd.s generate.
The foam stabiliser can be the foam stabiliser of this field routine.Preferably, the foam stabiliser is silicone Class A foam A stabilizer.Preferably, the silicone foam stabiliser is the model DC-193 that air Chemical Co., Ltd. generates Silicone foam stabiliser, Nanjing Dymatic Shichuang Chemical Co., Ltd. generate model AK8804 silicone class A foam A stablize It is one or more in the silicone foam stabiliser for the model B8545 that agent and Yingchuang Degussa Co., Ltd generate.More preferably Ground, the silicone class A foam A that the silicone foam stabiliser is the model B8545 that Yingchuang Degussa Co., Ltd generates are stablized Agent.
The catalyst for trimerization can be the trimerization reaction catalyst of this field routine.Preferably, the catalyst for trimerization is Amines catalyst and/or organometallic catalysts.
The organometallic catalysts can be the organometallic catalysts of this field routine, preferably potassium octanoate And/or potassium acetate.The amines catalyst can be the amines catalyst of this field routine, preferably tertiary amine catalyst.Institute It states tertiary amine catalyst and is preferably N, the composite catalyst of N- dimethyl benzylamines and catalyst JXP508；The catalyst JXP508 is the tertiary amine catalyst for the model JXP508 that air Chemical Co., Ltd. generates.The composite catalyst refers to described The mixture of N, N- dimethyl benzylamine and catalyst JXP508.Preferably, N described in the composite catalyst, N- dimethylbenzyl The mass ratio of amine and catalyst JXP508 are 1:1.
Preferably, the fluorination hydrocarbon blowing agents are the foaming agent that ODP values are zero.Preferably, the fluorination hydro carbons foaming Agent is 1,1,1,3,3- pentafluoropropane.
Preferably, described 1,1,1,3,3- pentafluoropropane produces for Honeywell Co., Ltds.
Preferably, the water is deionized water.
The fire retardant can be the fire retardant of this field routine, preferably halogen based flame retardant and/or phosphorus flame retardant. Preferably, the phosphorus flame retardant is three (2- chloropropyls) phosphates (abbreviation TCPP), three (2- chloroethyls) phosphates (abbreviation TCEP one or more) and in methyl-phosphoric acid dimethyl ester (DMMP)；More preferably it is three (2- chloropropyls) phosphates.
Preferably, the dosage of the polyether polyol A is 2~4 parts.
Preferably, the dosage of the polyester polyol A is 6~8 parts.
Preferably, the dosage of the foam stabiliser is 0.3~0.4 part.
Preferably, the dosage of the catalyst for trimerization is 0.2~0.3 part.
Preferably, the dosage of the foaming agent is 2~2.5 parts.
Preferably, the dosage of the fire retardant is 1~2 part.
Combined polyether of the present invention can be prepared according to this field customary preparation methods, for example, the combination is poly- The each component of ether is uniformly mixed, you can.Preferably, described be blended in the fool proof mixing vessel of tool carries out.Preferably, The mixing vessel is mixing kettle.Preferably, described be blended in rustless steel container carries out.Preferably, described be blended in stirring Under the conditions of carry out.Preferably, the time of the mixing is 0.5~1 hour.Preferably, the stirring carries out at room temperature.Preferably The speed on ground, the stirring is 5r/min~15r/min (such as 10r/min).
The two of technical scheme of the present invention：
The present invention also provides a kind of feedstock compositions of polyisocyanurate foam comprising component A and B component；Institute It is the combined polyether to state component A；The B component is isocyanates；The mass ratio of the component A and B component is 1: 1.5~1: 2.0。
The isocyanates can be the isocyanates of this field routine.Preferably, the isocyanates is polymeric methylehe Methane diisocyanate (abbreviation polymeric MDI).The polymeric diphenylmethane diisocyanate refers to two isocyanide of pure diphenyl methane The mixture of acid esters and polyphenyl polymethylene polyisocyanates.Preferably, the content of NCO is 30%- in the isocyanates 31%；Percentage is mass percent.
Preferably, the mass ratio of the combined polyether and the isocyanates is 1: 1.8.
Preferably, the polymeric MDI is the polymeric MDI of the model PM200 of Yantai Wanhua production.
The three of technical scheme of the present invention：
The present invention provides a kind of preparation methods of polyisocyanurate foam comprising following steps：By the A groups Divide and the B component mix, foams, polyisocyanurate foam is made, you can.
The condition of the preparation method of the polyisocyanurate foam can be the various normal conditions in this field.
Preferably, the foaming instrument is high-pressure unit.
Preferably, the blowing temperature is 20-25 DEG C.
Preferably, the foaming mould therefor is box mould.Preferably, the size of the box mould is 0.5*0.5* 0.5m~2.0*1.2*0.6m.Preferably, the temperature of the mold is 50~60 DEG C.
According to common sense in the field, the polyisocyanurate foam, in use, usually component A and B component make It is not mixed with preceding, and usually i.e. mixing is used, and usually foamed in note to box mould.
The four of technical scheme of the present invention：
The present invention provides the poly-isocyanurates obtained by a kind of preparation method by the polyisocyanurate foam Foam.
Preferably, the polyisocyanurate foam is hard polyisocyanurate foam.
According to common sense in the field, polyisocyanurate foam produced by the present invention is generally cut into thin plate or shell etc. Required shape, applied to requiring the building of high fire-retardance, the field of thermal insulation of pipeline and tank body.
In the present invention, it is 10~35 DEG C that the room temperature, which refers to environment temperature,.
Without prejudice to the field on the basis of common sense, above-mentioned each optimum condition can be combined arbitrarily each preferably to get the present invention Example.
The reagents and materials used in the present invention are commercially available.
The positive effect of the present invention is that：The present invention polyisocyanurate foam have excellent flame retardant property, Foam smoke-producing amount is small.
Specific implementation mode
It is further illustrated the present invention below by the mode of embodiment, but does not therefore limit the present invention to the reality It applies among a range.In the following examples, the experimental methods for specific conditions are not specified, according to conventional methods and conditions, or according to quotient Product specification selects.
The present invention will be further described with reference to embodiments.
Used raw material sources are as follows in following embodiment：
Polyether polyol SD4110 is purchased from Shanghai Dongda Chemical Co., Ltd.
Flame retardant polyester polyalcohol AK7004 is purchased from South Korea's love and respects chemistry.
Polyether polyol SA380 is purchased from Shandong blue star Dong great Chemical Co., Ltd.s.
Polyether polyol SA460 is purchased from Shandong blue star Dong great Chemical Co., Ltd.s.
Silicone foam stabiliser B8545 is purchased from win wound Degussa.
Polyurethane composite catalyst N, N- dimethyl benzylamine and JXP508 are purchased from air Chemical Co., Ltd..
Fire retardant TCPP is purchased from Jiangsu supernatural power gram Chemical Co., Ltd..
HFC-245fa is purchased from Honeywell.
Isocyanates is polymeric MDI, is purchased from Yantai Wanhua, model PM200.
1~embodiment of embodiment 4, comparative example 1 and comparative example 4
The composition of raw materials of 1~embodiment of the embodiment of the present invention 4, comparative example 1 and comparative example 4 is shown in Table 1, and effect data is shown in Table 2.It is as follows：
According to the formula in table 1, each ingredient other than isocyanates is added in stainless steel mixing kettle, at room temperature with The rotating speed of 10r/min stirs 1 hour, and blowing is up to Premixed polyether for polyisocyanurate foam.
According to the formula in table 1, combined polyether obtained is sent out according to mass ratio at 20 DEG C with isocyanates PM200 Bubble reaction, it is about 40Kg/m to inject obtained core density in mold3Rigid polyurethane foam heat insulation material, each embodiment and right The physical property of hard polyurethane foams obtained by ratio is shown in Table 2."/" indicates no added that "/" indicates no unit in table 2 in table 1.
Table 1
Table 2

Claims (10)

1. a kind of combined polyether, which is characterized in that it includes each component of following parts by weight：It is more than 0 and more less than 4 parts of polyethers First alcohol A, 6~10 parts of polyester polyol A, 0.3~0.5 part of foam stabiliser, 0.2~0.4 part of catalyst for trimerization, 2~3 parts of foaming Agent, 0.2~0.3 part of water and 1~3 part of fire retardant；
The polyether polyol A be viscosity be 5000-7000mPas, degree of functionality is 5.0 ± 0.3 and hydroxyl value be 420- The polyether polyol of 460mgKOH/g；
The polyester polyol A be viscosity be 6500-11500mPas, degree of functionality is 2.2 ± 0.2 and hydroxyl value be 260- The polyester polyol of 270mgKOH/g；
The viscosity of the polyether polyol A and polyester polyol A is 25 DEG C of dynamic viscosity；
The foaming agent is fluorination hydrocarbon blowing agents；The fluorination hydrocarbon blowing agents be 1,1,1,3,3- pentafluoropropane and/or 1, 1,1,3,3- 3-pentafluorobutane；
The polyether polyol A is the polyether polyol of model SD4110；With
The polyester polyol A is the polyester polyol of model AK7004.
2. combined polyether as described in claim 1, it is characterised in that：
The moisture of the polyether polyol A is less than 0.1%, and percentage is that the quality of the water in the polyether polyol A accounts for The percentage of the polyether polyol A gross masses；
And/or the number-average molecular weight of the polyether polyol A is 660-700；
And/or the moisture of the polyester polyol A is less than 0.1%, percentage is the water in the polyester polyol A Quality accounts for the percentage of the polyester polyol A gross masses；
And/or the number-average molecular weight of the polyester polyol A is 460-390；
And/or the acid value of the polyester polyol A is less than 1mgKOH/g；
And/or the foam stabiliser is silicone foam stabiliser；
And/or the catalyst for trimerization is amines catalyst and/or organometallic catalysts；
And/or the water is deionized water；
And/or the fire retardant is halogen based flame retardant and/or phosphorus flame retardant.
3. combined polyether as claimed in claim 2, it is characterised in that：
The organometallic catalysts are potassium octanoate and/or potassium acetate；
And/or the amines catalyst is tertiary amine catalyst；
And/or the silicone foam stabiliser is the silicone foam stabiliser of model DC-193, model AK8804 It is one or more in the silicone foam stabiliser of silicone foam stabiliser and model B8545；
And/or the phosphorus flame retardant is three (2- chloropropyls) phosphates, three (2- chloroethyls) phosphates and methyl acid phosphate diformazan It is one or more in ester.
4. combined polyether as claimed in claim 3, it is characterised in that：
The tertiary amine catalyst is N, the composite catalyst of N- dimethyl benzylamines and catalyst JXP508.
5. combined polyether as described in any one of claims 1 to 4, it is characterised in that：
The dosage of the polyether polyol A is 2~4 parts；
And/or the dosage of the polyester polyol A is 6~8 parts；
And/or the dosage of the foam stabiliser is 0.3~0.4 part；
And/or the dosage of the catalyst for trimerization is 0.2~0.3 part；
And/or the dosage of the foaming agent is 2~2.5 parts；
And/or the dosage of the fire retardant is 1~2 part.
6. a kind of feedstock composition of polyisocyanurate foam, which is characterized in that it includes component A and B component；The A groups It is divided into the combined polyether as described in any one of Claims 1 to 5；The B component is isocyanates；The component A and B component Mass ratio is 1: 1.5~1: 2.0.
7. feedstock composition as claimed in claim 6, it is characterised in that：
The isocyanates is polymeric diphenylmethane diisocyanate；
And/or the mass ratio of the combined polyether and the isocyanates is 1: 1.8.
8. a kind of preparation method of polyisocyanurate foam as claimed in claims 6 or 7, which is characterized in that it includes such as Lower step：The component A and the B component are mixed, foamed, polyisocyanurate foam is made, you can.
9. preparation method as claimed in claim 8, it is characterised in that：
The foaming instrument is high-pressure unit；
And/or the blowing temperature is 20-25 DEG C；
And/or the foaming mould therefor is box mould.
10. the poly-isocyanurate bubble obtained by a kind of preparation method by the polyisocyanurate foam of claim 8 or 9 Foam.
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