High-temperature slump retaining material and preparation method therefor

Abstract

A high-temperature slump retaining material and a preparation method therefor. The high-temperature slump retaining material is prepared from the following raw materials: 60-100 parts of a first polyether macromonomer, 2-16 parts of an unsaturated carboxylic acid (anhydride), 1.0-10 parts of a polyhydroxy carbohydrate, 0.5-5.0 parts of an unsaturated phosphonate, 15-35 parts of an unsaturated carboxylic ester, 100 parts of a second polyether macromonomer, 1-5 parts of an initiator, and 0.5-3.2 parts of a molecular weight regulator. The high-temperature slump retaining material has good slump retaining performance in a high-temperature environment at 40°C, and the polymer forms an indissolvable coating layer on the surfaces of cement particles to retard the normal hydration of cement, prolong the hydration induction period of the cement, slow down the hydration speed and prolong the setting time, and thus has a retarding effect.

Description

High temperature collapse retaining material and preparation method thereof Technical Field

[0001] The present invention relates to the technical field of concrete, in particular to a high-temperature collapse-preventing material and a preparation method thereof. Background Art

[0002] Polycarboxylic acid high-performance water-reducing agent has the characteristics of high water reduction, low dosage, and high slump retention. It can make concrete have good fluidity, thixotropy and long-term slump retention. However, when encountering complex and changeable materials such as cement, sand, and stone, it is easy to cause problems such as rapid slump loss of concrete, poor workability of concrete, and delayed water bleeding of concrete.

[0003] Slump-inhibiting agents are usually added to concrete to solve the problems of rapid slump loss of concrete, poor workability of concrete, and delayed water exudation of concrete. However, when the temperature is high, the cement hydration reaction is accelerated, the consumption of slump-inhibiting agents in the cement hydration process is accelerated, and the slump loss of concrete is large. In the ready-mixed concrete industry, concrete often loses slump too quickly during long-term transportation at high temperatures, affecting engineering construction and quality.

[0004] Summary of the Invention

[0005] Based on this, it is necessary to provide a high-temperature collapse-preserving material that can have a retarding effect at high temperatures and a preparation method thereof.

[0006] To achieve the above object, the present invention provides a technical solution:

[0007] A high-temperature collapse-preventing material, wherein the raw materials for preparing the high-temperature collapse-preventing material include, in parts by weight:

[0008] Polymer sustained-release material and water;

[0009] The structural formula of the first polyether macromonomer is as follows:

[0010] Wherein, R1 is H or -CH3;

[0011] R2 is -H, -CH3 or -C2H5;

[0012] M1 is a polyether chain obtained by ring-opening polymerization of ethylene oxide and / or propylene oxide. Preferably, the raw materials for preparing the first polyether macromonomer include, by weight:

[0013] Preferably, the initiator includes at least one of 2-methylallylamine, dimethylallylamine, N-methylallylamine and allylethylamine.

[0014] Preferably, the catalyst includes at least one of sodium methoxide, sodium tert-butoxide, sodium ethoxide, lithium aluminum tetrahydride, sodium hydroxide, potassium hydroxide, sodium cyanide and metallic sodium.

[0015] Preferably, the fluorophenoxy alkylene oxide includes at least one of [(4-fluorophenoxy)methyl]oxirane, 2-[(3-fluorophenoxy)methyl]oxirane, and 2-[(2-fluorophenoxy)methyl]oxirane.

[0016] Preferably, the unsaturated phosphonate includes at least one of 1-phenyl vinyl phosphate, diethyl phenyl allylate phosphate and dimethyl phenyl phosphate.

[0017] Preferably, the second polyether monomer includes at least one of allyl polyethylene glycol, 3-methyl-3-butene-1-polyethylene glycol, 2-methylallyl polyethylene glycol, vinyl glycol ether and 4-hydroxybutyl vinyl ether.

[0018] Preferably, the polyhydroxysaccharide comprises at least one of p-hydroxybenzoyl glucose, sucrose monoallyl ether, chitosan and N-acetylglucosamine.

[0019] The present invention also provides a method for preparing the high-temperature collapse-preventing material as described above, comprising the steps of:

[0020] mixing the first polyether macromonomer, unsaturated carboxylic acid (anhydride), polyhydroxy sugar, unsaturated phosphonate, unsaturated carboxylate, second polyether macromonomer and water to obtain a comonomer mixture solution;

[0021] The comonomer mixture solution, initiator and molecular weight regulator are mixed and reacted, and a high-temperature collapse-preserving mother solution is obtained after the reaction is completed;

[0022] The high-temperature collapse-preserving mother liquor is subjected to distillation and dehydration, cooling and crushing to obtain a collapse-preserving material;

[0023] Stirring the collapse retaining agent and the polymer sustained-release material uniformly to obtain a mixture;

[0024] The mixture is dried, cooled and crushed to obtain the high-temperature collapse-preserving material.

[0025] Preferably, the polymer sustained-release material is polycaprolactone with a molecular weight of 10,000 to 50,000.

[0026] Beneficial effects of the present invention:

[0027] 1. The present invention selects allylamine as an initiator to prepare a first polyether macromonomer, and uses fluorophenoxy alkylene oxide to end-cap the polyether monomer. When the prepared first polyether macromonomer participates in a copolymerization reaction, the first polyether macromonomer molecules are adsorbed on the surface of cement particles, which can increase the thickness of the water film layer between particles, improve the water retention of concrete, have a significant slurry lifting effect, and slow down the slurry collection rate of concrete.

[0028] 2. The present invention introduces amino groups, fluorophenyl structures, phosphate esters, and polyhydroxy sugar structures, which are adsorbed on the surface of cement particles, giving the collapse-preventing material of the present invention high-temperature resistance. Under a high-temperature environment of 40°C, the collapse-preventing performance is excellent. In addition, the polymer forms an insoluble coating on the surface of the cement particles, which hinders the normal hydration of the cement, prolongs the hydration induction period of the cement, slows down the hydration rate, prolongs the setting time, and has a retarding effect.

[0029] 3. The present invention introduces an unsaturated phosphonate with a phosphate structure. Since the phenyl phosphate monomer of the first polyether macromonomer carries multiple negative charges and has strong adsorption properties, the phosphate structure and carboxylate structure in the main chain coordinate with each other and continuously hydrolyze in the strong alkaline system of concrete. The released phosphate radical participates in the reaction of cement hydration products, wraps around the surface of cement particles, and slows the hydration rate.

[0030] 4. The collapse protection material prepared by the present invention introduces a polymer slow-release material, and the polymer slow-release material is used as a slow-release layer. It can be slowly degraded in the cement-cement system, so that there is no slow release in the initial stage of concrete mixing, but slow release in the later stage, further extending the collapse protection time of the concrete, and can be maintained for 5 hours without loss. The concrete has good workability, does not bleed, and does not swell. In addition, the introduction of this functional monomer can also inhibit the loss of water in the concrete, has the effect of water retention and slurry extraction, and is suitable for concrete projects with high collapse protection requirements. DETAILED DESCRIPTION

[0031] In order to better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below with reference to specific embodiments.

[0032] In the examples, the test methods used are conventional methods unless otherwise specified, and the materials, reagents, etc. used are all commercially available unless otherwise specified.

[0033] A high-temperature collapse-preventing material, wherein the raw materials for preparing the high-temperature collapse-preventing material include, in parts by weight:

[0034] Polymer sustained-release material and water;

[0035] The structural formula of the first polyether macromonomer is as follows:

[0036] Wherein, R1 is H or -CH3;

[0037] R2 is -H, -CH3 or -C2H5;

[0038] M1 is a polyether chain obtained by ring-opening polymerization of ethylene oxide and / or propylene oxide. In one embodiment, the polyhydroxy sugar comprises at least one of p-hydroxybenzoyl glucose, sucrose monoallyl ether, chitosan and N-acetylglucosamine.

[0039] In one embodiment, the raw materials for preparing the first polyether macromonomer include, in parts by weight:

[0040] In one embodiment, the initiator includes at least one of 2-methylallylamine, dimethylallylamine, N-methylallylamine and allylethylamine.

[0041] Specifically, the general structural formula of the initiator is as follows:

[0042] Wherein, R1 is H or -CH3;

[0043] R2 is -H, -CH3 or -C2H5;

[0044] In one embodiment, the catalyst includes at least one of sodium methoxide, sodium tert-butoxide, sodium ethoxide, lithium aluminum tetrahydride, sodium hydroxide, potassium hydroxide, sodium cyanide, and metallic sodium.

[0045] In one embodiment, the fluorophenoxy alkylene oxide includes at least one of [(4-fluorophenoxy)methyl]oxirane, 2-[(3-fluorophenoxy)methyl]oxirane, and 2-[(2-fluorophenoxy)methyl]oxirane.

[0046] Specifically, the structural formula of the fluorophenoxy alkylene oxide is as follows:

[0047] Among them, -F and -O- on the benzene ring can be ortho, meta and para positions.

[0048] In one embodiment, the alkylene oxide is ethylene oxide and / or propylene oxide.

[0049] More specifically, the preparation steps of the first polyether macromonomer are as follows:

[0050] Add initiator and catalyst to the reactor, evacuate to -0.1-0.2 MPa, replace with N2 to exclude oxygen, heat the reaction to 90-130°C, introduce alkylene oxide into the reactor, the reaction pressure is 0.2-5 MPa, and react for 1-3 hours;

[0051] When the pressure in the reactor stops decreasing, evacuate to -0.1-0.2 MPa, then introduce fluorophenoxy alkylene oxide into the reactor while maintaining the temperature at 90-130°C. When the pressure in the reactor stops decreasing, the reaction is complete, and the first polyether macromonomer is obtained.

[0052] In one embodiment, the unsaturated carboxylic acid ester includes at least one of hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate, hydroxypropyl methacrylate, hydroxybutyl acrylate, isooctyl acrylate, isooctyl methacrylate, and methyl methacrylate.

[0053] In one embodiment, the unsaturated phosphonate comprises at least one of 1-phenyl vinyl phosphate, diethyl phenyl acrylate phosphate, and dimethyl phenyl phosphate.

[0054] In one embodiment, the second polyether monomer includes at least one of allyl polyethylene glycol, 3-methyl-3-butene-1-polyethylene glycol, 2-methylallyl polyethylene glycol, vinyl glycol ether, and 4-hydroxybutyl vinyl ether, and has a molecular weight of 800-6000.

[0055] In one embodiment, the unsaturated carboxylic acid (anhydride) includes at least one of acrylic acid, methacrylic acid, fumaric acid, itaconic acid, maleic anhydride and itaconic anhydride.

[0056] In one embodiment, the initiator is a water-soluble inorganic peroxide initiator, a water-soluble redox initiator system or a water-soluble azo initiator;

[0057] Wherein, the water-soluble inorganic peroxide initiator includes at least one of ammonium persulfate and potassium persulfate;

[0058] The water-soluble redox initiation system includes at least one of hydrogen peroxide / bleaching powder, hydrogen peroxide / ascorbic acid, and persulfate / sodium bisulfite;

[0059] The water-soluble azo initiator includes at least one of azobisisobutylamidine hydrochloride, azobisisopropylimidazoline hydrochloride, azobiscyanovaleric acid, and azobisisopropylimidazoline.

[0060] In one embodiment, the molecular weight regulator includes at least one of thioglycolic acid, mercaptopropionic acid, mercaptoethanol, isopropyl alcohol, sodium hypophosphite, trisodium phosphate, sodium formate, sodium acetate and dodecanethiol.

[0061] The present invention also provides a method for preparing the high-temperature collapse-preventing material as described above, comprising the steps of:

[0062] mixing the first polyether macromonomer, unsaturated carboxylic acid (anhydride), polyhydroxy sugar, unsaturated phosphonate, unsaturated carboxylate, second polyether macromonomer and water to obtain a comonomer mixture solution;

[0063] The comonomer mixture solution, initiator and molecular weight regulator are mixed and reacted, and a high-temperature collapse-preserving mother solution is obtained after the reaction is completed (specifically, the comonomer mixture solution, initiator and molecular weight regulator are dropped into a reactor filled with water, and a stirrer is turned on to react. The reaction temperature is 5 to 50° C. and the dropping time is 1.0 to 1.5 hours. After the dropping is completed, the reaction is continued for 0.5 to 2.0 hours, and then the pH is adjusted to 5 to 7 with an alkali to obtain a high-temperature collapse-preserving mother solution. The alkali includes but is not limited to sodium hydroxide and potassium hydroxide.).

[0064] The high-temperature collapse-preserving mother liquor is subjected to distillation and dehydration, cooling and crushing to obtain a collapse-preserving material;

[0065] The collapse retaining agent and the polymer sustained-release material are stirred uniformly to obtain a mixture (the negative pressure value of distillation dehydration is 0.2 MPa, the temperature is 40-80° C., and the dehydration time is 2-5 h).

[0066] The mixture is dried, cooled and crushed to obtain the high-temperature collapse-preserving material.

[0067] In one embodiment, the polymer sustained-release material is polycaprolactone with a molecular weight of 10,000 to 50,000. The mass ratio of the collapse-preventing agent to the polymer sustained-release material is (0.5 to 5):1.

[0068] Example

[0069] 1. Preparation of the first polyether macromonomer

[0070] Add initiator and catalyst to the reactor, evacuate to -0.1 MPa, replace with N2 to exclude oxygen, heat the reaction to 90-140°C (T1), introduce alkylene oxide into the reactor, the reaction pressure is 0.2-5 MPa, and the reaction is carried out for 1-3 hours.

[0071] When the pressure in the reactor stops decreasing, evacuate to -0.1 MPa, then introduce the end-capping agent into the reactor and maintain the temperature at 90-140°C (T2). When the pressure in the reactor stops decreasing, the reaction is completed, and the first polyether macromonomer A is obtained.

[0072] The reactants and reaction conditions for preparing the first polyether macromonomer A in each embodiment are shown in Table 1.

[0073] Table 1. Reactants and reaction conditions for preparing the first polyether macromonomer A in each embodiment

[0074] 2. Preparation of high temperature collapse-preserving materials

[0075] (a) The first polyether macromonomer A prepared in step 1 is mixed with an unsaturated carboxylic acid (anhydride), a polyhydroxy sugar, an unsaturated phosphonate, an unsaturated carboxylate, and a second polyether macromonomer, and water is added to dissolve them to obtain a comonomer mixture solution B. The components and amounts of the comonomer mixture solution B are shown in Table 2.

[0076] Table 2 Components and dosage of comonomer mixture solution B

[0077] (b) The comonomer mixture solution B, initiator and molecular weight regulator were added dropwise to a reactor filled with water, and the stirrer was turned on to carry out the reaction. The reaction temperature was 5 to 50° C. and the addition time was 1.0 to 1.5 h. After the addition was completed, the reaction was continued for 0.5 to 2.0 h to obtain a copolymer product. The pH was then adjusted to 5 to 7 with an alkali to obtain a high-temperature collapse-preserving mother solution C. The reactants and reaction conditions for preparing the high-temperature collapse-preserving mother solution C are shown in Table 3.

[0078] Table 3 Reactants and reaction conditions for preparing high-temperature collapse-preserving mother solution C

[0079] (c). Dehydration, crushing and coating.

[0080] (1) Dehydration and pulverization: The high-temperature polycarboxylic acid collapse-preventing agent C1 prepared above was transferred to a distillation flask, the vacuum pump was turned on, the negative pressure value was 0.2 MPa, the temperature was raised to 50°C, and dehydrated by vacuum distillation. The dehydrated material was then cooled and pulverized to obtain a collapse-preventing material;

[0081] Coating: Add 400g of the collapse-preventing material into a flask containing 100g of molten polycaprolactone with a molecular weight of 10,000, heat to 60°C, and stir for 1.5h to allow the molten polycaprolactone and the collapse-preventing agent to fully compound and dissolve to obtain a mixture; then drum dry the obtained mixture, cool, and crush to obtain the high-temperature collapse-preventing material KZJ-1.

[0082] (2) The liquid high-temperature polycarboxylic acid slump retaining agent C2 prepared above was transferred to a distillation flask, the vacuum pump was turned on, the negative pressure value was 0.2 MPa, the temperature was raised to 60°C, and dehydrated by vacuum distillation, and the dehydrated material was cooled and crushed to obtain a slump retaining material;

[0083] Then add 420g of collapse-preventing material into a flask containing 100g of molten polycaprolactone with a molecular weight of 20,000, heat to 60°C, and stir for 1.5h to allow the molten polycaprolactone and the collapse-preventing agent to be fully compounded and dissolved to obtain a mixture; then, drum-dry the obtained mixture, cool, and crush to obtain a high-temperature, long-lasting collapse-preventing material KZJ-2.

[0084] (3) The liquid high-temperature polycarboxylic acid collapse-preventing agent C3 prepared above was transferred to a distillation flask, the vacuum pump was turned on, the negative pressure value was 0.2 MPa, the temperature was raised to 70°C, and dehydrated by vacuum distillation, and the dehydrated material was cooled and crushed to obtain a collapse-preventing material;

[0085] Then, 380 g of the collapse-preventing material was added to a flask containing 100 g of molten polycaprolactone with a molecular weight of 16,000, the temperature was raised to 60°C, and stirred for 1.0 h to allow the molten polycaprolactone and the collapse-preventing agent to be fully compounded and dissolved to obtain a mixture; the obtained mixture was then drum-dried, cooled, and crushed to obtain a high-temperature, long-lasting collapse-preventing material KZJ-3.

[0086] (4) The liquid high-temperature polycarboxylic acid slump retaining agent C4 prepared above was transferred to a distillation flask, the vacuum pump was turned on, the negative pressure value was 0.2 MPa, the temperature was raised to 50°C, and dehydrated by vacuum distillation, and the dehydrated material was cooled and crushed to obtain a slump retaining material;

[0087] Then, 400 g of the collapse-preventing material was added to a flask containing 100 g of molten polycaprolactone with a molecular weight of 30,000, the temperature was raised to 60°C, and stirred for 2.0 h to allow the molten polycaprolactone and the collapse-preventing agent to be fully compounded and dissolved to obtain a mixture; the obtained mixture was then drum-dried, cooled, and crushed to obtain a high-temperature, long-lasting collapse-preventing material KZJ-4.

[0088] (5) The liquid high-temperature polycarboxylic acid slump retaining agent C5 prepared above was transferred to a distillation flask, the vacuum pump was turned on, the negative pressure value was 0.2 MPa, the temperature was raised to 60°C, and dehydrated by vacuum distillation, and the dehydrated material was cooled and crushed to obtain a slump retaining material;

[0089] Then, 400 g of the collapse-preventing material was added to a flask containing 100 g of molten polycaprolactone with a molecular weight of 40,000, the temperature was raised to 60°C, and stirred for 1.0 h to allow the molten polycaprolactone and the collapse-preventing agent to be fully compounded and dissolved to obtain a mixture; the obtained mixture was then drum-dried, cooled, and crushed to obtain a high-temperature, long-lasting collapse-preventing material KZJ-5.

[0090] (6) The liquid high-temperature polycarboxylic acid slump retaining agent C6 prepared above was transferred to a distillation flask, the vacuum pump was turned on, the negative pressure value was 0.2 MPa, the temperature was raised to 60°C, and dehydrated by vacuum distillation, and the dehydrated material was cooled and crushed to obtain a slump retaining material;

[0091] Then add 320g of collapse-preventing material into a flask containing 100g of molten polycaprolactone with a molecular weight of 50,000, heat to 60°C, and stir for 2.0h to allow the molten polycaprolactone and the collapse-preventing agent to be fully compounded and dissolved to obtain a mixture; then, drum-dry the obtained mixture, cool, and crush to obtain a high-temperature, long-lasting collapse-preventing material KZJ-6.

[0092] Comparative Example 1

[0093] The commercially available model is point-T concrete collapse protection material, recorded as BT-1.

[0094] Comparative Example 2

[0095] Taking the process of Example 1 as the basic process, when preparing the high-temperature collapse-preserving material, the first polyether macromonomer A1 is not added, and other reaction conditions remain unchanged to obtain BT-2.

[0096] Comparative Example 3

[0097] The process of Example 1 is used as the basic process, without the coating treatment of the polymer sustained-release material (that is, the step of "adding 400 g of the collapse-preventing material to a flask containing 100 g of molten polycaprolactone, heating to 60° C., stirring for 1.5 h, so that the molten polycaprolactone and the collapse-preventing agent are fully compounded and miscible to obtain a mixture; and then drum-drying the obtained mixture, cooling and crushing" is deleted, and the collapse-preventing material is directly used as BT-3), and the other reaction conditions remain unchanged to obtain BT-3.

[0098] Comparative Example 4

[0099] BT-4 was prepared by using the process of Example 1 as the basic process and replacing A1 with commercially available conventional EPEG-3000 polyether macromonomer.

[0100] Comparative Example 5

[0101] BT-5 was prepared by using the process of Example 1 as the basic process, without adding polyhydroxy sugars and keeping other reaction conditions unchanged.

[0102] Comparative Example 6

[0103] BT-6 was prepared using the process of Example 1 as the basic process, without adding unsaturated phosphate and keeping other reaction conditions unchanged.

[0104] Performance testing:

[0105] The slump retaining agents prepared in Examples 1 to 6 and Comparative Examples 1 to 6 were compounded with the Kezhijie water-reducing agent PointTS08 at a solid content of 5:5 to form a sample with a solid content of 10%. When the dosage of Examples 1 to 6 was 1.0% (relative to the amount of cementitious material), the water reduction rate was higher than 34%, the 1d compressive strength ratio was greater than 200%, the 28d compressive strength ratio was greater than 170%, and the 28d shrinkage ratio was less than 60%.

[0106] The test was conducted under high temperature (42±3)℃, using Runfeng P.O42.5 ordinary Portland cement, and the concrete mix ratio was: cement 240kg / m 3 、Fly ash 90kg / m 3 、Mineral powder 30kg / m 3 , machine-made sand 820kg / m 3 、Stone 1020kg / m 3 , water 170kg / m 3 According to the above admixture formula, the performance of the collapse retaining agents prepared in Examples 1 to 6 and Comparative Examples 1 to 6 was compared, and the dosage of the admixture was adjusted so that the initial expansion of the concrete was (600±10) mm. The test indicators included the flow of concrete over time at 0h, 2h, 3h, 4h and 5h, the setting time and the compressive strength at each age. The results are shown in Table 4.

[0107] Table 4 Experimental results

[0108] From the test results in Table 4 above, we can get:

[0109] 1) Under a high temperature environment of 42±3°C, the slump retaining agent prepared by the present invention can achieve long-term slump retaining for 5 hours. After 5 hours, the fluidity is good, and there is no bleeding or hysteresis during the process. The encapsulation and workability are good. Under a high temperature environment, the initial setting time of the concrete reaches about 700 minutes, which has a retarding function compared with the comparative example.

[0110] 2) Under a high temperature environment of 42±3°C, the commercially available collapse retaining agent BT-1, which uses a higher amount of admixture than the patented product of the present invention, can only maintain collapse retention for 2 hours. After 3 hours, it has almost no fluidity. Its collapse retention performance is inferior to that of the patented product of the present invention, and its water bleeding rate is high, and its strength is lower than that of the product of the present invention.

[0111] 3) Comparative Example products BT-2 to BT-4, with a higher dosage than the patented product of the present invention, can only maintain slump retention for 2 hours. After 3 hours, they have basically no fluidity and cannot achieve slump retention for 5 hours. Their slump retention performance is inferior to that of the patented product of the present invention. They are not suitable for slump retention in high temperature environments, have lower strength than the product of the present invention, and their concrete setting time is 200 to 300 minutes lower than that of the patented product of the present invention.

[0112] 4) The comparative products BT-5 and BT-6 have the same dosage as the patented products of the present invention. Compared with other comparative products, their slump resistance is better, but their slump resistance is not as good as the products of the patented products of the present invention. The concrete workability is poor, there is a phenomenon of delayed bleeding, and the initial setting time is shorter than that of the patented products of the present invention.

[0113] It should be noted that the specific parameters or some reagents in the above embodiments are specific embodiments or preferred embodiments under the concept of the present invention, and are not intended to limit the present invention; those skilled in the art can make adaptive adjustments within the concept and protection scope of the present invention.

Claims

1. A high temperature collapse-preserving material, characterized in that: The raw materials for preparing the high temperature collapse-preserving material include, by weight: The structural formula of the first polyether macromonomer is as follows: Wherein, R1 is H or -CH3; R2 is -H, -CH3 or -C2H5; M1 is a polyether chain obtained by ring-opening polymerization of ethylene oxide and / or propylene oxide.

2. The slow-release collapse-preserving material according to claim 1, characterized in that: The polymer sustained-release material is polycaprolactone with a molecular weight of 10,000 to 50,000.

3. The high temperature collapse-preventing material according to claim 1, characterized in that: In parts by weight, the raw materials for preparing the first polyether macromonomer include:

4. The high temperature collapse-preventing material according to claim 3, characterized in that: The initiator includes at least one of 2-methylallylamine, dimethylallylamine, N-methylallylamine and allylethylamine.

5. The high temperature collapse-preventing material according to claim 3, characterized in that: The catalyst includes at least one of sodium methoxide, sodium tert-butoxide, sodium ethoxide, lithium aluminum tetrahydride, sodium hydroxide, potassium hydroxide, sodium cyanide and metallic sodium.

6. The high temperature collapse-preventing material according to claim 3, characterized in that: The fluorophenoxy alkylene oxide includes at least one of [(4-fluorophenoxy)methyl]ethylene oxide, 2-[(3-fluorophenoxy)methyl]ethylene oxide, and 2-[(2-fluorophenoxy)methyl]ethylene oxide.

7. The high temperature collapse-preventing material according to claim 1, characterized in that: The unsaturated phosphonate includes at least one of 1-phenyl vinyl phosphate, diethyl phenyl acrylate phosphate and dimethyl phenyl acrylate phosphate.

8. The high temperature collapse-preventing material according to claim 1, characterized in that: The second polyether monomer includes at least one of allyl polyethylene glycol, 3-methyl-3-butene-1-polyethylene glycol, 2-methylallyl polyethylene glycol, vinyl glycol ether and 4-hydroxybutyl vinyl ether.

9. The high temperature collapse-preventing material according to claim 1, characterized in that: The polyhydroxy sugar includes at least one of p-hydroxybenzoyl glucose, sucrose monoallyl ether, chitosan and N-acetylglucosamine.

10. A method for preparing a high temperature collapse-preventing material according to any one of claims 1 to 9, characterized in that: Includes steps: The first polyether macromonomer, unsaturated carboxylic acid (anhydride), polyhydroxy sugar, unsaturated phosphonate, unsaturated carboxylic acid ester, second polyether macromonomer and water are mixed to obtain a comonomer mixture solution; The comonomer mixture solution, initiator and molecular weight regulator are mixed and reacted, and a high temperature type collapse-preserving mother solution is obtained after the reaction is completed; The high temperature type collapse-preserving mother liquor is subjected to distillation and dehydration, cooling and crushing treatment to obtain a collapse-preserving material; The collapse-preserving agent and the polymer sustained-release material are stirred uniformly to obtain a mixture; The mixture is dried, cooled and crushed to obtain the high temperature collapse retaining material.

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