CN114539504B - High-fluidity pipeline heat-insulating material and preparation method thereof - Google Patents
High-fluidity pipeline heat-insulating material and preparation method thereof Download PDFInfo
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Abstract
The invention provides a high-fluidity pipeline heat-insulating material and a preparation method thereof. Wherein the isocyanate component is a polyisocyanate; the combined white material component comprises a polyol composition, a small molecule tertiary alcohol composition, a catalyst, water and a surfactant. The prepared pipeline heat insulation material has good bonding performance, heat conductivity coefficient and flow property, the heat conductivity coefficient is 0.015-0.040 w/m.k, the compression strength is 300-600kPa, the bonding strength is 0.5-4MPa, the heat loss of foam is less than 2% after being placed at a high temperature of 140 ℃ for 96 hours, the prepared foam has good fluidity, the density distribution of products is uniform, and the yield is improved by about 3-5% compared with the traditional formula.
Description
Technical Field
The invention belongs to the technical field of polyurethane foam, and particularly relates to a high-fluidity pipeline heat insulation material and a preparation method thereof.
Background
As the application of polyurethane foam fields expands, the worldwide demand for polyurethane increases rapidly. Polyurethane belongs to an environment-friendly material and accords with national development strategy. The polyurethane foam has the characteristics of lowest heat conductivity coefficient and good heat preservation effect, and is widely applied to various heat preservation fields, such as refrigerator and freezer, cold chain transportation, cold storage spraying, building heat preservation, pipeline transportation and the like.
With the improvement of the living standard of urban people and the increase of urban population, the energy consumption of urban people is increased day by day, and the popularization of urban heating and the heat preservation requirement are gradually improved. The city adopts central heating, and the heating pipeline is long and the conveying distance is long, so that the polyurethane hard foam heat preservation pipe is rapidly developed. The polyurethane hard foam heat-insulating pipe has good heat resistance, good heat-insulating effect and high closed pore rate, and can better insulate heat and prevent water, so that the overall heat consumption of the heat-insulating heat-supply pipeline is greatly reduced.
Patent CN103819644a describes a pipeline thermal insulation material with good fluidity and a preparation method thereof, the pipeline composite material improves the fluidity and high-temperature aging resistance of the material by adjusting the type and proportion of polyether polyol, and the method is extremely conventional and does not play a fundamental role in improving the fluidity of the material.
Patent CN102391775a describes a high temperature resistant polyurethane heat insulation pipe composition which does not lose its mechanical properties at high temperatures above 120 ℃ and has no carbonization at high temperatures of 200 ℃, but has poor flowability due to excessively high black-and-white ratio and isocyanate index.
The high-temperature aging resistance and fluidity are very critical performances of the polyurethane pipeline heat insulation material, but the prior art is poor in high-temperature aging resistance of foam at 140 ℃, the fluidity of the production process is poor, the foam density distribution is uneven, and especially the density of two ends of the pipeline is greatly different from the density of a material injection port, so that the foam yield is low, and the production cost of the pipeline is increased.
Therefore, the demand for polyurethane pipeline heat insulation materials with high fluidity and high temperature aging resistance is strong in the industry.
Disclosure of Invention
The invention aims to provide a polyurethane pipeline heat insulation material with high fluidity, which has higher bonding strength and excellent foam fluidity, wherein the heat conduction coefficient of the heat insulation material is 0.015-0.040W/m.k, the compression strength is 300-600kPa, the thermal weight loss is less than 2% when the heat insulation material is placed at a high temperature of 140 ℃ for 96 hours, the heat insulation material is not shrunk in size, the density distribution of a product is uniform, and the yield is improved by 3-5% compared with that of a traditional formula.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a high-fluidity pipeline heat-insulating all-water composite material comprises a component A polyisocyanate and a component B composite white material; the mass ratio of the component A to the component B is 1.7-1:1, preferably 1.6-1:1, a step of;
the component B comprises the following components in percentage by total mass:
the polyisocyanate of the component A is selected from one or more of aliphatic diisocyanate, aromatic diisocyanate and derivatives thereof with NCO functionality of more than or equal to 2, preferably one or more of aromatic diisocyanate and derivatives thereof, more preferably polymethylene polyphenyl polyisocyanate, and has a viscosity of 130-400 mPas (25 ℃). Such as the brands of PM-200, PM-400, PM-700, PM-2010, etc. of Wanhua chemistry.
The polyol composition of the component B of the present invention comprises vegetable oil polyol, polyether polyol, polyester polyol, preferably comprising the following polyols, based on the total mass of the polyol composition:
a vegetable oil polyol having a number average molecular weight of 300 to 2000, preferably 320 to 1500, more preferably 350 to 1200; functionality of 2-4; a hydroxyl value of 60 to 500mgKOH/g, preferably 80 to 400mgKOH/g, more preferably 100 to 300mgKOH/g; the content is 10-40wt%, preferably 15-35wt%, more preferably 18-30wt%;
polyether polyol 1 having a number average molecular weight of 200 to 900, preferably 250 to 900, more preferably 280 to 800; functionality of 4-8; a hydroxyl number of 250 to 800mgKOH/g, preferably 280 to 780KOH/g, more preferably 300 to 760KOH/g; the content is 30-60wt%, preferably 35-55wt%, more preferably 38-50wt%;
polyether polyol 2 having a number average molecular weight of 500 to 3000, preferably 700 to 2000, more preferably 750 to 1800; functionality of 2-3, hydroxyl number of 50-330mgKOH/g, preferably 80-320mgKOH/g, more preferably 100-300mgKOH/g; the content is 5-30wt%, preferably 8-28wt%, more preferably 10-25wt%;
polyester polyols having a number average molecular weight of 200 to 1000, preferably 300 to 800, more preferably 350 to 750; functionality of 2-3; a hydroxyl number of 200 to 800mgKOH/g, preferably 220 to 780mgKOH/g, more preferably 250 to 750mgKOH/g; the content is 10 to 40wt%, preferably 15 to 35wt%, more preferably 18 to 30wt%.
The vegetable oil polyol of the component B of the present invention is selected from one or more of castor oil, soybean oil, palm oil, sunflower seed oil or modified products thereof, preferably one or more of castor oil, soybean oil or palm oil, more preferably castor oil and/or soybean oil. For example, castor oil from Qingdao Tongkai Castor Limited, castor oil from Nanjing Jin Haiwei chemical industry Limited, soybean oil polyol from Guangzhou sea ken vegetable oil Limited, and the like.
The initiator of the polyether polyol 1 in the component B is one or more of sucrose, sorbitol, xylitol, pentaerythritol and mannitol, preferably one or more of sucrose, sorbitol and pentaerythritol, more preferably sucrose and/or sorbitol. Such as, for example, A60, A29-1, A29-2, tianjin tri-petrochemical 450L from Wanhua chemical (Ningbo) Rong Wei polyurethane limited.
The initiator of the polyether polyol 2 in the component B is one or more of glycerol, diethylene glycol, ethylene glycol, propylene glycol, dipropylene glycol, diethylene glycol and trimethylolpropane, preferably one or more of glycerol, ethylene glycol, propylene glycol and diethylene glycol, more preferably glycerol and/or ethylene glycol. Such as R2307, C2010, of the company of the polyurethane limited, vandergar chemical (Ningbo) Rong Wei, TMN-1000 of the three petrochemical company of Tianjin.
The polymerized monomers of polyether polyol 1 and polyether polyol 2 are one or more of ethylene oxide, propylene oxide and tetrahydrofuran, preferably propylene oxide.
The polyester polyol in the component B of the present invention is a polycondensation product of a dihydric alcohol and a dicarboxylic acid (anhydride) or dicarboxylic acid ester. The acid (anhydride) is one or more of phthalic acid (anhydride), isophthalic acid (anhydride), terephthalic acid, adipic acid (anhydride), glutaric acid (anhydride) and succinic acid (anhydride), preferably one or more of phthalic acid (anhydride), adipic acid (anhydride) and terephthalic acid; the dihydric alcohol is one or more of ethylene glycol, propylene glycol, butanediol, pentanediol and hexanediol, preferably diethylene glycol and/or dipropylene glycol. Such as CF-6255, CF-6245, CF-6300, CF-6200, CF-6365, PS-3152, PS-2412, PS-2352 of Spanish, and HT-1100 of Inward.
The small molecule tertiary alcohol composition in the component B of the invention is mono-tertiary enol and di-tertiary alcohol. The mass ratio of the mono-tertiary enol to the di-tertiary alcohol is 0.1-10:1, preferably 0.4-8:1, more preferably 0.5-6:1. because tertiary hydroxyl contained in the small molecule tertiary alcohol has larger steric hindrance, lower activity at normal temperature and can react with isocyanate only at high temperature, the excellent earlier-stage fluidity of the composite material is endowed by the use of the temperature-sensitive catalyst in a water foaming system with higher reaction heat, and the subsequent curing is not influenced. Therefore, the pipeline heat-insulating material has low activity at normal temperature and relatively high activity at high temperature, so that the heat-insulating material has excellent early-stage fluidity and late-stage curing performance;
the double bond in the enol endows the polyurethane with good mechanical property and high-temperature aging resistance; the enol contains double bonds and hydroxyl, the hydroxyl belongs to polar bonds, the compatibility with polyether polyol is good, the double bonds belong to nonpolar bonds, and the compatibility with polyester and vegetable oil is good, so that the enol plays an emulsifying role in a combined white material system, the compatibility among all components is improved, and the system is more uniform.
In addition, as the mono-tertiary enol is a monofunctional alcohol substance, the mono-tertiary enol can be blocked when reacted with isocyanate, so that good toughness of polyurethane is provided; the dihydric tertiary alcohol is a difunctional alcohol substance, plays a role in chain extension when reacting with isocyanate, and endows polyurethane with good strength. Therefore, the simultaneous use of the mono-tertiary enol and the di-tertiary alcohol plays a good synergistic effect, so that the toughness and the strength of the polyurethane are improved, and the polyurethane has a certain improvement effect on other mechanical properties of the polyurethane.
Wherein the monohydric tertiary enol comprises one or two of dihydromyrcenol or 2-methyl-3-buten-2-ol, preferably 2-methyl-3-buten-2-ol; the dihydric tertiary alcohol includes one or more of 2, 4-dimethyl-2, 4-pentanediol, 2, 5-dimethyl-2, 5-hexanediol, 2, 6-dimethyl-2, 6-heptanediol, etc., preferably one or two of 2, 4-dimethyl-2, 4-pentanediol or 2, 5-dimethyl-2, 5-hexanediol. Such as 2-methyl-3-buten-2-ol from mikrin, 2, 4-dimethyl-2, 4-pentanediol from bevernier technology, inc.
The surfactant in the component B of the present invention includes one or more of a non-silicon compound and a polyether-modified organosilicon compound, preferably one or more of polyether-modified organosilicon compounds. Such as B8423, B8545, B8476, U.S. air chemical products DC-193, DC-198, nanjing Maillard chemical Co., ltd., AK8801, AK8802, AK8803, AK8804, AK8805, L-6900, L-6100NT, L-6200NT, L-6863, L-6915, L-6952, U.S. Michaelis. The surfactant can increase the intersolubility of the raw materials, and has the functions of emulsifying foam materials, stabilizing foam and regulating cells.
The catalyst in the component B of the invention comprises one or more of an amine catalyst and an organometallic salt catalyst. Amine catalysts are preferably bicyclic amidines and derivatives thereof, including but not limited to 1, 8-diazacycloundecene and derivatives thereof, such as DBU, SA102, etc. of the winning chemistry; the organic metal salt catalyst comprises one or more of potassium isooctanoate, quaternary ammonium formate, potassium acetate, dibutyl tin dilaurate, stannous octoate, dibutyl tin diacetate and potassium oleate. Wherein the temperature-sensitive catalyst accounts for 0.01-6%, preferably 0.02-5%, more preferably 0.03-4% of the component B.
The isocyanate index of the pipeline heat-preserving all-water composite material in the invention is 1.0-1.6, preferably 1.01-1.55.
The invention relates to a method for preparing a high-fluidity pipeline heat-preservation all-water composite material and a polyurethane material, which comprises the following steps:
(1) Uniformly mixing the polyol composition, the small molecular tertiary alcohol composition, water, the catalyst and the surfactant according to the proportion in the technical scheme to prepare a combined white material component B;
(2) And (3) mixing the component B and the component A of the combined white material prepared in the step (1) according to the mass ratio of 1:1-1:1.7, respectively pouring the mixture into a pipeline mould through a high-pressure pouring machine to prepare pipeline products. Such as claus meffy high pressure casting machines, are cast in a pipe mould by casting processes known to the skilled person, such as controlling the temperature of the a-and B-components between 22-26 c.
The invention has the positive effects that:
(1) The temperature sensitivity of the tertiary alcohol and isocyanate reaction is utilized to prepare a high-fluidity pipeline composite material, tertiary hydroxyl has larger steric hindrance and lower activity at normal temperature, but can rapidly react with isocyanate at high temperature, and the characteristic of high heat release in the water foaming process provides the required heat for the reaction;
(2) The C=C in the tertiary enol endows the polyurethane material with high dimensional stability, mechanical property and high temperature resistance, so that the pipeline has excellent ageing resistance under the use condition of 140 ℃; the enol contains double bonds and hydroxyl, plays an emulsifying role in a combined polyether system, improves the compatibility of each component, and makes the system more uniform;
(3) The mono-tertiary enol is a monofunctional alcohol substance, and can be blocked when reacting with isocyanate, so that good toughness of polyurethane is provided; the dihydric tertiary alcohol is a difunctional alcohol substance, plays a role in chain extension when reacting with isocyanate, and endows polyurethane with good strength. Therefore, the use of the mono-tertiary enol and the di-tertiary alcohol simultaneously plays a good role in the improvement of the mechanical properties of polyurethane.
(4) The temperature-sensitive catalyst and the small molecule tertiary alcohol form a synergistic effect, the temperature sensitivity of the temperature-sensitive catalyst is high, the activity of the temperature-sensitive catalyst is relatively low at normal temperature, the temperature-sensitive catalyst can be quickly deblocked to form a strong gel catalyst at high temperature, the rapid reaction of water, polyalcohol and isocyanate is promoted, a large amount of heat is released, the reaction of the tertiary alcohol and the isocyanate is further promoted, and finally the product has excellent later-stage curing performance;
(5) In a water foaming system, under the combined action of tertiary alcohol, enol, a temperature-sensitive catalyst and water, the prepared pipeline heat-insulating polyurethane material has the heat conductivity coefficient of 0.015-0.040W/m.k, the compression strength of 300-600kPa, the bonding strength of 0.5-4MPa, the thermal weight loss of 96 hours at the high temperature of 140 ℃ is less than 2%, the size is not shrunk, the foam fluidity is good, the density distribution of a final product is uniform, and the yield is improved by 3-5% compared with that of the traditional formula.
Detailed Description
The following examples further illustrate the methods provided by the present invention, but the invention is not limited to the examples listed and should include any other known modifications within the scope of the claimed invention.
Raw material information:
polyester polyol: polyester polyol CF-6255 (molecular weight 516, functionality 2.3, hydroxyl number 250mg KOH/g, terephthalic acid polyester polyol), polyester polyol PS-3152 (molecular weight 350, functionality 2, hydroxyl number 315mg KOH/g, phthalic anhydride polyester polyol) from the Nanjing Kangplastic De chemical company;
sorbitol polyether (polyether polyol 1): mo Huarong WeiA 60 (molecular weight 680, functionality 5.4, hydroxyl number 450mg KOH/g, sorbitol as initiator, PO as repeat unit);
sucrose polyether (polyether polyol 1): mo Huarong WeiA 29-1 (molecular weight 860, functionality 6.3, hydroxyl value 410mg KOH/g, sucrose as initiator, PO as repeat unit);
polyoxypropylene triol (polyether polyol 2): mo Huarong Wei R2307 (molecular weight 700, functionality 3, hydroxyl number 240mg KOH/g, glycerol as initiator, PO as repeat unit), tianjin three petrochemical Co., ltd., TMN-1000 (molecular weight 1000, functionality 3, hydroxyl number 168mg KOH/g, glycerol as initiator, PO as repeat unit);
vegetable oil polyol: qingdao Tongkai castor oil (molecular weight 900, functionality 2.7, hydroxyl number 163mg KOH/g); guangzhou sea chestnut soybean oil (molecular weight 700, functionality 2.5, hydroxyl number 200mg KOH/g);
small molecule tertiary alcohols: 2-methyl-3-buten-2-ol (structural formula is
Molecular weight 86, hydroxyl value 652mg KOH/g), 2, 4-dimethyl-2, 4-pentanediol (structural formula is
Molecular weight 132.2, hydroxyl number 848mg KOH/g);
dipropylene glycol: the Dow chemical, molecular weight 134, hydroxyl number 837mg KOH/g;
water: distilled water;
and (2) a surfactant: demeishi wound AK8803 silicone oil;
catalyst: win-creation chemistry DBU (temperature sensitive catalyst), TMR-2 (metal salt catalyst);
polymethylene polyphenyl isocyanates: wanhua chemical PM-200.
Example 1
And (3) preparing a component B: 29.6kg of A60, 14.8kg of R2307, 14.8kg of soybean oil, 14.8kg of PS-3152, 5kg of 2-methyl-3-butene-2-ol, 5kg of 2, 4-dimethyl-2, 4-pentanediol, 9kg of AK-8803, 3kg of DBU, 2kg of TMR-2 and 2kg of water are added into a 100L kettle, stirred and dispersed for 60min, and then the component B is obtained.
Preparing a pipeline heat-insulating polyurethane material: adding the component A PM-200 and the component B into a storage tank of a Claus Marfei high-pressure casting machine, controlling the gauge pressure to 7MPa, heating the material to 25 ℃, preheating a pipeline die to 25 ℃, and according to the mass ratio of the component A: component B = 1.3:1, pouring the foam into a pipeline mould, curing the foam for 24 hours, and then testing the foam performance.
Examples 2 to 6 and comparative examples 1 to 4 refer to example 1 for the preparation method of the composition and the preparation method of the foam.
The amounts and types of the components added to the compositions of examples 1 to 6 and comparative examples 1 to 4 were as follows (mass, kg):
table 1 formulation for each example
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | |
| A60 | 29.6 | 0 | 30 | 0 | 23.3 | 23.3 |
| A29-1 | 0 | 19.2 | 21 | 21.6 | 0 | 0 |
| R2307 | 14.8 | 0 | 2 | 0 | 6.5 | 6.5 |
| TMN-1000 | 0 | 18 | 2.25 | 14.4 | 0 | 0 |
| Soybean oil | 14.8 | 0 | 4 | 0 | 13.7 | 13.7 |
| Castor oil | 0 | 13.8 | 4.5 | 28.8 | 0 | 0 |
| PS-3152 | 14.8 | 0 | 11 | 7.2 | 10 | 10 |
| CF-6255 | 0 | 9 | 10.25 | 0 | 19 | 19 |
| 2-methyl-3-buten-2-ol | 5 | 13.5 | 2.5 | 12 | 2 | 2 |
| 2, 4-dimethyl-2, 4-pentanediol | 5 | 4.5 | 2.5 | 8 | 3.5 | 3.5 |
| AK8803 | 9 | 10 | 9.85 | 0.1 | 11 | 11 |
| DBU | 3 | 2 | 0.03 | 2 | 3.5 | 3.5 |
| TMR-2 | 2 | 4 | 0.02 | 1.9 | 2 | 2 |
| H 2 O | 2 | 6 | 0.1 | 4 | 5.5 | 5.5 |
| PM-200 | 130 | 160 | 130 | 150 | 100 | 170 |
| Black-to-white ratio | 1.3 | 1.6 | 1.3 | 1.5 | 1.0 | 1.7 |
| R value | 1.21 | 1.01 | 1.54 | 1.07 | 0.67 | 1.15 |
Table 2 comparative example formulation
| Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | |
| A60 | 29.6 | 29.6 | 29.6 | 29.6 |
| R2307 | 14.8 | 14.8 | 14.8 | 14.8 |
| Soybean oil | 14.8 | 14.8 | 14.8 | 14.8 |
| PS-3152 | 14.8 | 14.8 | 14.8 | 14.8 |
| 2-methyl-3-buten-2-ol | 0 | 5 | 0 | 5 |
| 2, 4-dimethyl-2, 4-pentanediol | 0 | 0 | 5 | 5 |
| Dipropylene glycol | 10 | 5 | 5 | 0 |
| AK8803 | 9 | 9 | 9 | 9 |
| DBU | 3 | 3 | 3 | 0 |
| TMR-2 | 2 | 2 | 2 | 5 |
| H 2 O | 2 | 2 | 2 | 2 |
| PM-200 | 130 | 130 | 130 | 130 |
| Black-to-white ratio | 1.3 | 1.3 | 1.3 | 1.3 |
| R value | 1.19 | 1.21 | 1.19 | 1.21 |
Hard-infusion performance test results prepared in examples 1-6, comparative examples 1-4:
TABLE 3 Table 3
Note that: the density difference is the rate of change of the difference between the density of the foam at the material injection port and the density of the foam at the tail part in the flow direction of the foam, and can be used for representing the uniformity of the density of the foam, and the smaller the density difference is, the better the fluidity of the foam is.
The pipeline heat-insulating all-water material prepared in the examples 1-6 has excellent mechanical property, heat conductivity coefficient, bonding strength and high-temperature aging resistance, and also has excellent fluidity, so that the foam density distribution of the product is uniform, the foam yield is improved, and the practical application of the pipeline heat-insulating polyurethane material is better met.
The above examples and comparative examples demonstrate that the addition of small molecule tertiary alcohol in combination with 2-methyl-3-buten-2-ol and 2, 4-dimethyl-2, 4-pentanediol has significant effects on improving the flowability and high temperature aging resistance of the pipeline insulation all-water composition.
Claims (33)
1. The high-fluidity pipeline heat-insulating material is characterized by comprising a component A polyisocyanate and a component B composite white material; the mass ratio of the component A to the component B is 1.7-1:1, a step of;
the component B comprises the following components in percentage by total mass:
the polyol composition of the component B comprises the following polyols, based on the total mass of the polyol composition:
a vegetable oil polyol having a number average molecular weight of 300 to 2000; functionality of 2-4; the hydroxyl value is 60-500mgKOH/g; the content is 10-40wt%;
polyether polyol 1 having a number average molecular weight of 200 to 900; functionality of 4-8; the hydroxyl value is 250-800mgKOH/g; the content is 30-60wt%;
polyether polyol 2 having a number average molecular weight of 500 to 3000; functionality is 2-3, hydroxyl value is 50-330mgKOH/g; the content is 5-30wt%;
a polyester polyol having a number average molecular weight of 200 to 1000; functionality of 2-3; a hydroxyl value of 200-800mgKOH/g; the content is 10-40wt%;
the small molecule tertiary alcohol composition in the component B is mono-tertiary enol and di-tertiary alcohol;
the catalyst in the component B comprises an amine catalyst and an organic metal salt catalyst; the amine catalyst is 1, 8-diazacycloundecene and derivatives thereof; the content of the 1, 8-diazacycloundecene and the derivative thereof is 0.01-6% of the component B.
2. The high-fluidity pipe insulation material according to claim 1, wherein the mass ratio of the component a to the component B is 1.6-1:1, a step of;
the component B comprises the following components in percentage by total mass:
3. the high-fluidity pipe heat-insulating material according to claim 1, wherein the polyisocyanate of the A component is one or more selected from the group consisting of aliphatic polyisocyanates having NCO functionality of 2 or more, aromatic polyisocyanates and derivatives thereof.
4. The high-fluidity pipe insulating material according to claim 3, wherein the polyisocyanate of the a component is one or more selected from the group consisting of aromatic diisocyanates and derivatives thereof.
5. The high-fluidity pipe insulating material according to claim 4, wherein the polyisocyanate of the A component is polymethylene polyphenyl polyisocyanate having a viscosity of 130 to 400 mPas at 25 ℃.
6. The high flow pipe insulation of claim 1 wherein the polyol of the B component comprises the following polyols, based on the total mass of the polyol composition:
vegetable oil polyol having a number average molecular weight of 320-1500 and a functionality of 2-4; hydroxyl value is 80-400mgKOH/g; the content is 15-35wt%;
polyether polyol 1 having a number average molecular weight of 250 to 900; functionality of 4-8; the hydroxyl value is 280-780KOH/g; the content is 35-55wt%;
polyether polyol 2 having a number average molecular weight of 700 to 2000; functionality is 2-3, hydroxyl value is 80-320mgKOH/g; the content is 8-28wt%;
a polyester polyol having a number average molecular weight of 300 to 800; functionality of 2-3; the hydroxyl value is 220-780mgKOH/g; the content is 15-35wt%.
7. The high flow pipe insulation of claim 6, wherein the polyol of the B component comprises the following polyols, based on the total mass of the polyol composition:
a vegetable oil polyol having a number average molecular weight of 350 to 1200; functionality of 2-4; hydroxyl value is 100-300mgKOH/g; the content is 18-30wt%;
polyether polyol 1 having a number average molecular weight of 280 to 800; functionality of 4-8; the hydroxyl value is 300-760KOH/g; the content is 38-50wt%;
polyether polyol 2 having a number average molecular weight of 750 to 1800; functionality is 2-3, hydroxyl value is 100-300mgKOH/g; the content is 10-25wt%;
a polyester polyol having a number average molecular weight of 350 to 750; functionality of 2-3; a hydroxyl value of 250-750mgKOH/g; the content is 18-30wt%.
8. The high flow pipe insulation of claim 1 wherein the vegetable oil polyol in the B component is selected from one or more of castor oil, soybean oil, palm oil, sunflower oil or modified products thereof.
9. The high flow conduit insulating material of claim 8, wherein the vegetable oil polyol in the B component is one or more of castor oil, soybean oil, or palm oil.
10. The high-fluidity pipe insulation material according to claim 9, wherein the vegetable oil polyol in the B component is castor oil and/or soybean oil.
11. The high-fluidity pipe insulation material according to claim 1, wherein the initiator of the polyether polyol 1 in the B component is one or more of sucrose, sorbitol, xylitol, pentaerythritol and mannitol.
12. The high-fluidity pipe insulation material according to claim 11, wherein the initiator of the polyether polyol 1 in the B component is one or more of sucrose, sorbitol and pentaerythritol.
13. The high flow pipe insulation of claim 12, wherein the initiator for polyether polyol 1 in the B component is sucrose and/or sorbitol.
14. The high-fluidity pipe insulation material according to claim 1, wherein the initiator of the polyether polyol 2 in the B component is one or more of glycerin, diethylene glycol, ethylene glycol, propylene glycol, dipropylene glycol and trimethylolpropane.
15. The high flow pipe insulation of claim 14, wherein the initiator for the polyether polyol 2 in the B-component is one or more of glycerol, ethylene glycol, propylene glycol, and diethylene glycol.
16. The high flow pipe insulation of claim 15, wherein the initiator for the polyether polyol 2 in the B component is glycerol and/or ethylene glycol.
17. The high-fluidity pipe heat-insulating material according to claim 1, wherein the polymerized monomer of polyether polyol 1 and polyether polyol 2 is one or more of ethylene oxide, propylene oxide and tetrahydrofuran.
18. The high flow conduit insulating material of claim 17, wherein the polymerized monomer of polyether polyol 1 and polyether polyol 2 is propylene oxide.
19. The high-fluidity pipe insulation material according to claim 1, wherein the polyester polyol in the B component is a polycondensation product of a dihydric alcohol and a dicarboxylic acid or dicarboxylic anhydride; the dicarboxylic acid or dicarboxylic anhydride is one or more of phthalic acid, phthalic anhydride, isophthalic acid, isophthalic anhydride, terephthalic acid, adipic anhydride, glutaric acid, glutaric anhydride, succinic acid and succinic anhydride, and the dihydric alcohol is one or more of ethylene glycol, propylene glycol, butanediol, pentanediol, hexanediol, diethylene glycol and dipropylene glycol.
20. The high flow conduit insulating material of claim 19, wherein the dicarboxylic acid or dicarboxylic anhydride is one or more of phthalic acid, phthalic anhydride, adipic acid, adipic anhydride, and terephthalic acid; the dihydric alcohol is diethylene glycol and/or dipropylene glycol.
21. The high-fluidity pipe heat-insulating material according to claim 1, wherein the mass ratio of the mono-tertiary enol to the di-tertiary alcohol is 0.1-10:1.
22. the high-fluidity pipe heat-insulating material according to claim 21, wherein the mass ratio of the addition of the mono-tertiary enol and the di-tertiary alcohol is 0.4-8:1.
23. the high-fluidity pipe heat-insulating material according to claim 22, wherein the mass ratio of the addition of the mono-tertiary enol and the di-tertiary alcohol is 0.5-6:1.
24. the high flow conduit insulating material of claim 1, wherein the mono-tertiary enol comprises one or both of dihydromyrcenol or 2-methyl-3-buten-2-ol; the dihydric tertiary alcohol comprises one or more of 2, 4-dimethyl-2, 4-pentanediol, 2, 5-dimethyl-2, 5-hexanediol and 2, 6-dimethyl-2, 6-heptanediol.
25. The high flow conduit insulating material of claim 24, wherein the mono-tertiary enol is 2-methyl-3-buten-2-ol; the dihydric tertiary alcohol is one or two of 2, 4-dimethyl-2, 4-pentanediol or 2, 5-dimethyl-2, 5-hexanediol.
26. The high-fluidity pipe insulating material according to claim 1, wherein the surfactant in the B component comprises one or more of a non-silicon compound and a polyether-modified organosilicon compound.
27. The high flow conduit insulating material of claim 26, wherein the surfactant in component B is one or more of polyether modified organosilicon compounds.
28. The high flow conduit insulating material of claim 1, wherein the organometallic salt catalyst comprises one or more of potassium isooctanoate, potassium acetate, dibutyltin dilaurate, stannous octoate, dibutyltin diacetate, and potassium oleate.
29. The high-fluidity pipe heat-insulating material according to claim 1, wherein the 1, 8-diazacycloundecene and the derivative thereof account for 0.02-5% of the B component.
30. The high-fluidity pipe thermal insulation material according to claim 29, wherein the 1, 8-diazaundecene and derivatives thereof account for 0.03-4% of the B component.
31. The high flow conduit insulation of claim 1 wherein the conduit insulation has an isocyanate index of from 1.0 to 1.6.
32. The high flow conduit insulation of claim 31 wherein the conduit insulation has an isocyanate index of from 1.01 to 1.55.
33. The method for preparing a high-fluidity pipe insulation material according to any one of claims 1 to 32, comprising the steps of:
(1) Uniformly mixing the polyol composition, the small molecular tertiary alcohol composition, water, the catalyst and the surfactant according to the proportion in the technical scheme to prepare a combined white material component B;
(2) And (3) pouring the composite white material B component and the component A polyisocyanate prepared in the step (1) into a pipeline mould through a high-pressure casting machine according to the mass ratio to prepare a pipeline product.
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