CN116063026A - Polyurethane pavement material with pavement cooling function - Google Patents

Polyurethane pavement material with pavement cooling function Download PDF

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Publication number
CN116063026A
CN116063026A CN202111298370.4A CN202111298370A CN116063026A CN 116063026 A CN116063026 A CN 116063026A CN 202111298370 A CN202111298370 A CN 202111298370A CN 116063026 A CN116063026 A CN 116063026A
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polyurethane
component
polyol
pavement
porous material
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缪宝吉
庞德政
张文生
李雅迪
高博
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Wanhua Chemical Group Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02—Macromolecular compounds
    • C04B26/10—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B26/16—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/60—Planning or developing urban green infrastructure

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  • Ceramic Engineering (AREA)
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Abstract

The invention discloses a polyurethane pavement material with a pavement cooling function. A porous material modified polyisocyanate composition comprising a component a combined polyether and a component B; wherein the component B comprises 8-19% of heat insulation material by mass percent, and the heat insulation material is a porous material modified by diisocyanate based on the mass of the component B. The polyurethane pavement material has excellent freeze-thawing damage resistance and low-temperature fatigue toughness, can effectively reduce the adsorption of the polyurethane material to moisture, and improves the water damage resistance of an adhesive layer and the long-term hydrolysis resistance of the polyurethane material. By reducing the absorption and accumulation of solar heat and the blocking effect, the temperature of the road surface is reduced by 15 ℃ at most.

Description

Polyurethane pavement material with pavement cooling function
Technical Field
The invention belongs to the technical field of pavement materials, and particularly relates to a polyurethane pavement material with a pavement cooling function.
Background
With the gradual increase of global environment warming and road pavement hardening rate, urban heat island phenomenon is more and more obvious, and urban heat environment quality is gradually deteriorated, which greatly influences the living environment of the city and the living standard of people. The pavement is used as the most main ground surface structure, the influence on the urban heat island effect is most remarkable, and the urban heat island effect is influenced mainly through three modes of pavement heat conduction, road surface heat radiation and heat convection on surrounding environment temperature fields. The influence factors of the road on the heat island effect mainly comprise: the heat absorption and storage capacity of the road material, the reflectivity of the road surface, the heat conductivity of the road structure and the like. In the current environment, most of road pavement structures in China are asphalt pavement, and due to the black characteristic of the asphalt pavement, the asphalt pavement has strong heat absorption capacity, the absorption rate of sunlight heat reaches 0.85-0.95, and the highest temperature of the asphalt pavement can reach more than 60 ℃ in the hot and high-temperature environment in summer, so that the urban heat island effect is greatly enhanced. Aiming at the serious thermal environment problem and the serious urban heat island effect of urban roads, the development of road pavement materials with cooling effect is becoming urgent.
At present, the method for reducing the temperature of the pavement is mainly to heat and spread a reflective coating on the pavement. Such as publication number CN110437709a "asphalt pavement heat reflective coating and method for preparing the same", reduces the pavement temperature by applying the heat reflective coating on the pavement. Although the method can reduce the pavement temperature to a certain extent, the method has the problems of short service life of the paint, reduction of the cooling effect of the paint due to accumulation and coverage of pollutants such as pavement dust and the like, and increase of VOC emission due to volatilization of an organic solvent. The casting type concrete with the publication number of CN 111170678A as a binder and a preparation method thereof, wherein the casting type concrete is prepared by using a single-component polyurethane binder, so that the problems of serious early diseases and short service life of a steel bridge deck pavement layer are solved, the application field of the casting type concrete is limited to a steel bridge deck, and an expensive latent curing agent is used in the preparation process, so that the casting type concrete is unfavorable for large-scale application. The dual-component polyurethane composition for concrete modification disclosed in the publication No. CN 110922091A and the preparation method thereof utilize dual-component polyurethane to modify concrete, so that the mechanical property and mechanical property of cement concrete materials are improved, and the problems of poor mechanical property and the like of polymer modified cement materials are solved, but the bonding surface of the composite material needs to be subjected to pretreatment such as water washing, acid washing and the like in the actual application process, so that the actual use cost and the application range are greatly reduced. The publication No. CN 112824474A is an aldehyde-free adhesive, a method for preparing a composite artificial board by using the aldehyde-free adhesive, and the prepared composite artificial board, wherein the composite artificial board is prepared by using modified isocyanate as the adhesive, so that the problems of the trial period of the adhesive, the water resistance of the board and the like are solved. However, the curing process of the modified isocyanate is moisture curing, so that the problem of bubbles is inevitably generated in the curing process, and the bonding effect of the adhesive layer is affected.
Disclosure of Invention
The invention aims to provide a polyurethane pavement material with a pavement cooling function and a preparation method thereof. The polyurethane pavement material with the pavement cooling function has the advantages of high strength, good bonding performance, excellent hydrolysis resistance stability and aging resistance, long service life, little influence by pollutant aggregation, no environmental pollution and the like, and can obviously reduce the pavement temperature by 13-15 ℃.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a polyurethane pavement material with a pavement cooling function comprises a component A combined polyether and a component B porous material modified polyisocyanate composition; wherein the component B comprises 8-19% of heat insulation material by mass percent, and the heat insulation material is a porous material modified by diisocyanate based on the mass of the component B.
The mass ratio of the component A to the component B is 1-2:1, preferably 1.2-1.8:1.
the component A comprises the following components in percentage by mass:
Figure BDA0003337272070000021
Figure BDA0003337272070000031
the isocyanate index of the polyurethane pavement material is 0.95-1.35, preferably 1.0-1.3.
The polyol combination of the A component comprises one or more of vegetable oil polyol, polyether polyol and polyester polyol, preferably comprises the following polyols based on the total mass of the polyol combination:
vegetable oil polyol 1 having a number average molecular weight of 300 to 1400, preferably 350 to 1300, a functionality of 2 to 4, a hydroxyl number of 150 to 300mgKOH/g, preferably 50 to 80wt%, more preferably 53 to 75wt%;
vegetable oil polyol 2 having a number average molecular weight of 1500 to 3500, preferably 1600 to 3400, a functionality of 2 to 6, a hydroxyl value of 50 to 150mgKOH/g, preferably 10 to 40% by weight, more preferably 16 to 37% by weight;
polyether polyol 1 having a number average molecular weight of 200 to 400, preferably 220 to 380, a functionality of 2 to 4, a hydroxyl number of 400 to 800mgKOH/g, preferably 1 to 6wt%, more preferably 1 to 5wt%;
polyether polyol 2 having a number average molecular weight of 400 to 1000, preferably 450 to 950, a functionality of 3 to 6 and a hydroxyl number of 200 to 400mgKOH/g, preferably 1 to 10% by weight, more preferably 2 to 8% by weight.
The vegetable oil polyol 1 in the component A is selected from one or more of castor oil, soybean oil, palm oil, sunflower seed oil or modified products thereof, preferably castor oil and/or modified products thereof. The castor oil modified product is castor oil derivative with different hydroxyl values, functionalities and molecular weights obtained through alcoholysis and transesterification of ethylene glycol, glycerol, trimethylolpropane and pentaerythritol. Suitable examples include, but are not limited to, castor oil from Castor engineering Inc. of Qingdao Tongkai, castor oil from Nanjing Jin Haiwei chemical industry Inc., GR-160, GR-220 from Vertellus, U.S. and Uric H-30, uric H-854 from Eyew systems, japan.
The vegetable oil polyol 2 in the component A is selected from one or more of castor oil, soybean oil polyol, palm oil, sunflower oil or modified products thereof, preferably soybean oil polyol and or palm oil polyol. Suitable examples include, but are not limited to, sea-land, guangzhou, sea-land, equipped with soybean oil polyol 10100, X-0500 from Cargill, U.S. A., soyol560 from Beijing Bosca technology, inc., PKF 3000 from Malaysia maskii polyol.
The initiator of the polyether polyol 1 in the component A is one or more of glycerol, propylene glycol, ethylene glycol, diethylene glycol, dipropylene glycol and trimethylolpropane, ethylenediamine, triethanolamine, toluenediamine and sucrose, preferably one or more of glycerol, toluenediamine, triethanolamine, sucrose and ethylenediamine, more preferably glycerol and/or ethylenediamine. Suitable examples include, but are not limited to, a303, a304, a403 of the company of polyurethane, vancomic (Ningbo) Rong Wei.
The initiator of the polyether polyol 2 in the component A is one or more of glycerol, propylene glycol, ethylene glycol, diethylene glycol, dipropylene glycol, trimethylolpropane, ethylenediamine and triethanolamine, and preferably one or more of glycerol, toluenediamine, triethanolamine, sucrose and trimethylolpropane. Suitable examples include, but are not limited to, A305, A307, A35, A29, A42-A of Wanhua chemistry (Ningbo) Rong Wei polyurethane limited.
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 chain extender in the component A comprises one or more of alcohol or amine chain extenders. The alcohol chain extender includes, but is not limited to, 1,4 butanediol, dipropylene glycol, diethylene glycol, 1,6 hexanediol, etc.; the amine chain extender includes, but is not limited to, 3' -dichloro-4, 4' -diphenyl methane diamine, 3, 5-dimethyl thiotoluene diamine, 3, 5-diethyl toluene diamine, 4' -methylenebis (3-chloro-2, 6-diethyl aniline), and the like. Preferably one or more of 1, 4-butanediol, dipropylene glycol, diethylene glycol, propylene glycol, more preferably 1, 4-butanediol and/or propylene glycol. The chain extender can increase the hard segment content of polyurethane and improve the strength and hardness of the product.
The wetting and dispersing agent in the component A is one or more of BYK 9076, BYK9077, BYK-W961, BYK-W966, BYK-W980, BYK-W969 and BYK-W985, preferably one or more of BYK-980, BYK9077, BYK-W961 and BYK-W966, more preferably one or more of BYK-980, BYK9077 and BYK-W961.
The catalyst in the A component is an organic metal catalyst, and comprises one or more of potassium isooctanoate, quaternary ammonium formate, potassium acetate, dibutyl tin dilaurate, stannous octoate, dibutyl tin diacetate and potassium oleate, preferably dibutyl tin dilaurate, and suitable examples include but are not limited to Dabco T12 of air chemical industry products company in the United states and Yoke T-12 of Jiangsu Yixing Jack chemical industry Co.
The preparation method of the component A comprises the following steps: adding the polyol combination and the chain extender into a reaction kettle according to the proportion, stirring for 30-60min, then sequentially adding the wetting dispersant and the catalyst, and continuously stirring for 45-70min to obtain the component A.
The component B of the invention comprises the following components:
8-19wt%, preferably 10-17wt% of the diisocyanate modified porous material;
81 to 92% by weight, preferably 83 to 90% by weight, of polymethylene polyphenyl isocyanate.
The diisocyanate is one or more of toluene diisocyanate, diphenylmethane diisocyanate, isoparaffin diisocyanate, hexamethylene diisocyanate and dicyclohexylmethane diisocyanate.
The porous material is one or more of nano silicon dioxide, molecular sieve, active carbon, diatom purity, porous silicon oxide and porous aluminum oxide, and the particle size of the porous material is 0.1-1nm.
As a preferred embodiment, the porous material of the present invention is preferably a diatom purity and/or molecular sieve having a pore size of 0.1 to 1nm, preferably 0.2 to 0.5nm; the porosity is 75-90%, preferably 80-90%; specific surface area of 60-70m 2 Preferably 62-70m 2 And/g. Suitable examples include, but are not limited to, blue environmental technology diatom purity, siliporite nk30 from CECA corporation of archema, france.
Preferably, the diisocyanate modified porous material is diphenylmethane diisocyanate modified diatom purity and/or molecular sieve.
The polymethylene polyphenyl isocyanate disclosed by the invention comprises, but is not limited to, PM-100, PM-120, PM-200, PM-300, PM-400, PM-2010, PM-2025, PM-6302 and PM-6304 manufactured by Wanhua chemical group Co., ltd.
The preparation method of the isocyanate modified porous material comprises the following steps: according to the proportion, the porous material is roasted for 1-1.5h at 300-500 ℃, dispersed in toluene solution of diisocyanate, heated to 70-90 ℃ and reacted for 1-4h under the protection of nitrogen, filtered, washed and dried.
The preparation method of the component B comprises the following steps: adding the polymethylene polyphenyl isocyanate and the diisocyanate modified porous material into a reaction kettle according to the proportion, and stirring for 30-60min to obtain the component B.
A polyurethane mixture comprising the following composition: 18-25 parts by mass of basalt coarse aggregate S10 with the particle size of 10-15mm, 16-23 parts by mass of basalt coarse aggregate S12 with the particle size of 5-10mm, 40-58 parts by mass of basalt fine aggregate S15 with the particle size of 0.075-5mm, 2-12 parts by mass of mineral powder and 3-6 parts by mass of polyurethane pavement material.
The preparation method of the polyurethane mixture comprises the following steps: according to the proportion, the coarse aggregate S10, the coarse aggregate S12, the fine aggregate S15, mineral powder and the component A in the polyurethane pavement material are stirred for 30-180S, and then the component B in the polyurethane pavement material is added to continue stirring for 30-180S, so as to obtain the polyurethane mixture.
The invention has the positive effects that:
(1) The polyurethane pavement material is a pavement bonding material for replacing asphalt, and the polyurethane pavement material is used as the pavement bonding material and has the characteristics of high bonding strength, hydrolysis resistance, freeze thawing resistance, wear resistance and the like, and can effectively bond aggregates together and effectively prevent water from damaging a bonding layer;
(2) The polyurethane material with high thermal resistance is used for replacing asphalt material, so that the absorption and conduction of heat of the pavement are effectively reduced. The pore diameter of the selected porous material is between 0.2 and 0.5 nanometers, and the special pore diameter can prevent isocyanate components from blocking pore channels and losing the heat insulation effect. Meanwhile, the diisocyanate is used for improving the affinity of the porous material to the polyisocyanate to a certain extent after the surface of the porous material is modified, so that the dispersibility of the porous material in isocyanate components can be effectively improved, and the uniformity of the integral heat insulation effect of the polyurethane material is improved;
(3) The vegetable oil polyol 1 and the vegetable oil polyol 2 used in the invention contain a large amount of long-chain fatty groups, and the long-chain fatty groups can be inserted into the middle of polyurethane molecular chains to play a role in lubrication, reduce friction among the polyurethane molecular chains, prevent hydrolysis of water molecules on urethane bonds, and endow the polyurethane material with good flexibility and hydrolysis resistance; the long-chain fatty groups in the vegetable oil polyol 1 and the vegetable oil polyol 2 do not participate in the reaction with isocyanate, and can be inserted between polyether chain segments, so that the effect of adsorbing water molecules by ether bonds is reduced, and the adhesion effect of the polyurethane molecules and the base materials is prevented from being damaged by the water molecules. The ether bond has better low-temperature flexibility due to lower cohesive energy and easy rotation. Under the condition that the vegetable oil polyol 1, the vegetable oil polyol 2, the polyether polyol 1 and the polyether polyol 2 are used simultaneously, the synergistic effect between the vegetable oil polyether polyol and the polyether polyol can be fully exerted, so that the prepared polyurethane material has excellent freeze-thawing damage resistance and low-temperature fatigue toughness;
(4) The bonding performance of the adhesive and stone materials and the thermal oxidation resistance of the adhesive can be effectively improved by utilizing a large amount of ester bonds in the vegetable oil polyol 1 and the vegetable oil polyol 2; the vegetable oil polyol 1 and the vegetable oil polyol 2 contain a large number of nonpolar groups, and the existence of the nonpolar groups can obviously improve the hydrophobicity of the polyol combination; the diisocyanate modified porous material has the capability of adsorbing water, the polyol combination with the hydrophobic effect and the porous material with the water absorption capability can play a synergistic effect when the two materials are used simultaneously, the adsorption of the polyurethane material to water can be effectively reduced, and the water loss resistance of the adhesive layer and the long-term hydrolysis resistance of the polyurethane material are improved.
Detailed Description
For a better understanding of the technical solution of the present invention, the following examples are further described below, but the present invention is not limited to the following examples.
Raw material information:
vegetable oil polyol 1: qingdao Tongkai castor oil (molecular weight 929, functionality 2.7, hydroxyl number 163mg KOH/g), GR-160 from Vertellus company of America (molecular weight 928, functionality 2.7, hydroxyl number 164mg KOH/g);
vegetable oil polyol 2: guangzhou sea chest soybean oil polyol 10100 (molecular weight 2500, hydroxyl number 110mg KOH/g), soyol560 (molecular weight 1636.25, functionality 3.5, hydroxyl number 120mg KOH/g) of Beijing Boscha technologies Co., ltd.);
a310 (comparative example): tianjin tri-petrochemical Co., ltd., molecular weight 1000, functionality 3, hydroxyl value 168mg KOH/g, glycerol as initiator, PO as repeating unit;
polyoxypropylene triol (polyether polyol 1): mo Huarong WeiA 303 (molecular weight 300, functionality 3, hydroxyl number 561mg KOH/g, glycerol as initiator, PO as repeat unit), mo Huarong WeiA 403 (molecular weight 400, functionality 3, hydroxyl number 420.75mg KOH/g, glycerol as initiator, PO as repeat unit);
polyoxypropylene triol (polyether polyol 2): mo Huarong WeiA 305 (molecular weight 500, functionality 3, hydroxyl number 336.6mg KOH/g, glycerol as initiator, PO as repeat unit), mo Huarong WeiA 307 (molecular weight 700, functionality 3, hydroxyl number 240.4mg KOH/g, glycerol as initiator, PO as repeat unit);
c2004: mo Huarong Wei, molecular weight 400, functionality 2, hydroxyl value 280.5mg KOH/g, propylene glycol as initiator, PO as repeating unit;
1, 4-butanediol: the molecular weight of the Shanghai Wu Song chemical general factory is 90.12, and the hydroxyl value is 1245mg KOH/g;
1, 2-propanediol: hounsman, usa, molecular weight 76.09, 1474.6mg KOH/g;
diatom purity: blue-moist environment-friendly technology;
3A molecular sieves: siliporiteNK30 from CECA corporation of archema, france;
BYK9077: BYK company;
PM-200: wanhua chemical PM-200;
t12: beijing Zhengheng chemical Co., ltd
KIT-6 molecular sieve: kelamal (comparative example, pore size 4-10 nm)
70# asphalt: shandong road Wide road materials Co., ltd (comparative example)
Preparation of isocyanate modified porous material:
50 parts by mass of MDI-50 and 100 parts by mass of toluene are added into a three-neck flask and stirred for 5min under the protection of nitrogen, then 10 parts by mass of porous material subjected to high-temperature dehydration treatment is added, the mixture is stirred for 15min, the mixture is heated to 80 ℃ and reacts for 3h under the protection of nitrogen, after the reaction is finished, the reaction is naturally cooled to room temperature, filtered, washed and dried in vacuum for 12h under the condition of 40 ℃ to obtain the isocyanate modified porous material.
Example 1
Preparing a component A: 60g of castor oil, 24g of soybean oil 10100,3g of R2303,5g of R2305 and 4g of 1, 2-propanediol are weighed and stirred in a reaction kettle for 45min, then 3.98g of BYK9077 and 0.02g of T12 are added and stirring is continued for 60min, and the component A is obtained.
And (3) configuring a component B: 9g of modified heat insulation material and 57g of PM-200 are weighed and stirred in a reaction kettle for 45min, and the component B is obtained.
Preparation of the mixture: 305.2g of coarse aggregate S10, 278.6g of coarse aggregate S12, 653.8g of fine aggregate S15, 92.4g of mineral powder and 42.2g of polyurethane pavement material A component are weighed and stirred in a stirring pot for 60S, and then 27.8g of B component is added into the stirring pot and stirred for 60S to obtain the polyurethane mixture. Polyurethane mix rut boards were prepared with rut thickness of 5cm and cured for 24 hours with reference to highway engineering asphalt and asphalt mix test procedure (JTGE 20-2011).
Rut plate temperature test: the rut board is placed in the outdoor environment at the same time, and the surface temperature of the rut board is measured.
Road performance test: the relevant properties were tested with reference to highway engineering asphalt and asphalt mixture testing procedure (JTGE 20-2011).
Examples 2 to 6 and comparative examples 1 to 7 refer to example 1 for the preparation method of the A, B component, the preparation method of the polyurethane mixture and the preparation of the test piece.
Comparative example 8
Preparation of the mixture: weighing 305.2g of coarse aggregate S10, 278.6g of coarse aggregate S12 and 653.8g of fine aggregate S15 in a mixing pot and heating to 200 ℃, then adding 70g of 70# asphalt heated to 140 ℃ in the mixing pot, mixing for 90S, then adding 92.4g of mineral powder, continuing mixing for 100S to obtain an asphalt mixture, preparing an asphalt mixture rut board with rut thickness of 5cm according to the test procedure of highway engineering asphalt and asphalt mixture (JTGE 20-2011), preparing the rut board, and airing at a ventilation position for 24h.
The amounts and types of the components added in the compositions of examples 1 to 6 and comparative examples 1 to 7 are shown in tables 1 and 2, respectively (the amounts added are in parts by mass):
table 1 formulation for each example
Figure BDA0003337272070000091
Figure BDA0003337272070000101
Table 2 comparative example formulations
Component (A) 1 2 3 4 5 6 7
Castor oil 0 60 0 60 60 60 60
10100 0 0 24 24 24 24 24
A310 84 24 60 0 0 0 0
A303 3 3 3 0 3 0 3
A305 5 5 5 0 0 5 5
C2004 0 0 0 8 5 3 0
1, 2-propanediol 4 4 4 4 4 4 4
BYK9077 3.98 3.98 3.98 3.98 3.98 3.98 3.98
T12 0.02 0.02 0.02 0.02 0.02 0.02 0.02
Modified diatom purity 9 9 9 9 9 9 0
Modified KIT-6 molecular sieve 0 0 0 0 0 0 9
PM-200 57 57 57 57 57 57 57
R 1.01 1.02 1.07 1.15 1.10 1.13 1.09
A:B 1.52 1.52 1.52 1.52 1.52 1.52 1.52
The temperature and road performance data for examples 1-6, comparative examples 1-8 are shown in Table 3.
TABLE 3 temperature and road performance data for examples 1-6, comparative examples 1-8
Figure BDA0003337272070000102
Figure BDA0003337272070000111
The polyols used in the comparative examples are all polyether polyols, so that the prepared polyurethane material contains a large amount of hydrophilic ether bonds, the existence of the ether bonds greatly improves the hydrophilicity of the polyurethane pavement material, and the stone itself has higher hydrophilicity, so that moisture is easier to invade between interfaces of the polyurethane material and the stone and damage the adhesion between the polyurethane material and the stone in the presence of the stone and a large amount of polyether polyols, thereby reducing the performances such as the residual stability, the freeze-thawing cleavage strength ratio and the like of the polyurethane pavement material.
Those skilled in the art will appreciate that certain modifications and adaptations of the invention are possible and can be made under the teaching of the present specification. Such modifications and adaptations are intended to be within the scope of the present invention as defined in the appended claims.

Claims (10)

1. A polyurethane pavement material with a pavement cooling function comprises a component A combined polyether and a component B porous material modified polyisocyanate composition; wherein the component B comprises 8-19% of heat insulation material by mass percent, and the heat insulation material is a porous material modified by diisocyanate based on the mass of the component B.
2. The polyurethane pavement material according to claim 1, wherein the mass ratio of the component A to the component B is 1-2:1, preferably 1.2-1.8:1.
3. the polyurethane pavement material according to claim 1, wherein the a component comprises, based on the total mass of the a component:
Figure FDA0003337272060000011
4. the polyurethane pavement material according to claim 1, wherein the polyol combination of the a-component comprises one or more of vegetable oil polyols, polyether polyols, polyester polyols, preferably comprises the following polyols, based on the total mass of the polyol combination:
vegetable oil polyol 1 having a number average molecular weight of 300 to 1400, preferably 350 to 1300, a functionality of 2 to 4, a hydroxyl number of 150 to 300mgKOH/g, preferably 50 to 80wt%, more preferably 53 to 75wt%;
vegetable oil polyol 2 having a number average molecular weight of 1500 to 3500, preferably 1600 to 3400, a functionality of 2 to 6, a hydroxyl value of 50 to 150mgKOH/g, preferably 10 to 40% by weight, more preferably 16 to 37% by weight;
polyether polyol 1 having a number average molecular weight of 200 to 400, preferably 220 to 380, a functionality of 2 to 4, a hydroxyl number of 400 to 800mgKOH/g, preferably 1 to 6wt%, more preferably 1 to 5wt%;
polyether polyol 2 having a number average molecular weight of 400 to 1000, preferably 450 to 950, a functionality of 3 to 6 and a hydroxyl number of 200 to 400mgKOH/g, preferably 1 to 10% by weight, more preferably 2 to 8% by weight.
5. The polyurethane pavement material according to claim 1, wherein the vegetable oil polyol 1 is selected from one or more of castor oil from the chemical industry limited company of tokyo, castor oil from the chemical industry limited company of south tokyo Jin Haiwei, GR-160, GR-220 from Vertellus company of usa, and uri H-30, uri H-854 from the company of eiderwood oil, japan; and/or the vegetable oil polyol 2 is selected from one or more of Guangzhou sea-lug-ma soybean oil polyol 10100, X-0500 of Cargill corporation in the United states, soyol560 of Beijing Bosca technology Co., ltd, PKF 3000 of Maleisia maskii polyol corporation.
6. The polyurethane pavement material according to claim 1, wherein the polyether polyol 1 is selected from a303, a304, a403 of the company of vernonia chemical (Ningbo) Rong Wei polyurethane limited; and/or the polyether polyol 2 is selected from one or more of A305, A307, A35, A29, A42-A of Wanhua chemistry (Ningbo) Rong Wei polyurethane Co., ltd.
7. The polyurethane pavement material of claim 1, wherein the B component comprises the following composition:
8-19wt%, preferably 10-17wt% of the diisocyanate modified porous material;
81 to 92% by weight, preferably 83 to 90% by weight, of polymethylene polyphenyl isocyanate.
8. The polyurethane pavement material according to claim 1, wherein the porous material is one or more of nano silicon dioxide, molecular sieve, activated carbon, diatom purity, porous silicon oxide and porous aluminum oxide, and the particle size of the porous material is 0.1-1nm; preferably diatom purity and/or molecular sieves, pore size of 0.1-1nm, preferably 0.2-0.5nm; the porosity is 75-90%, preferably 80-90%; specific surface area of 60-70m 2 Preferably 62-70m 2 /g。
9. The polyurethane pavement material according to claim 1, wherein the porous material is selected from the group consisting of blue environmental protection technology diatom purity, siliporite nk30 from CECA corporation.
10. The polyurethane pavement material according to claim 1, wherein the preparation method of the isocyanate modified porous material comprises the following steps: according to the proportion, the porous material is roasted for 1-1.5h at 300-500 ℃, dispersed in toluene solution of diisocyanate, heated to 70-90 ℃ and reacted for 1-4h under the protection of nitrogen, filtered, washed and dried.
CN202111298370.4A 2021-11-04 2021-11-04 Polyurethane pavement material with pavement cooling function Pending CN116063026A (en)

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