A polyether polyol and a method for its synthesis

Abstract

This invention discloses a polyether polyol and its synthesis method, belonging to the field of polyether polyol technology. The method includes: weighing 0-600g of hydrogenated bisphenol A, 0-600g of bisphenol A, 1-200g of a difunctional compound containing active hydrogen, 0.79-4.9g of an alkaline catalyst, 310-1570g of epoxide alkane, and 10-100g of alicyclic hydrocarbon; polymerization reaction, ripening, monomer removal treatment, and cooling purification. This invention, by introducing alicyclic hydrocarbons and aromatic structures to form a block structure, optimizes the ratio of hydrogenated bisphenol A to bisphenol A and the combination of difunctional compounds containing active hydrogen, effectively solving the problems of uneven hydroxyl value distribution, excessive viscosity fluctuations, and high viscosity in existing technologies. This ensures the stability of the product's reactivity and processing fluidity, guaranteeing the accuracy of formulation implementation and the quality of product molding in downstream applications.

Description

Technical Field

[0001] This invention relates to the field of polyether polyol technology, and specifically to a polyether polyol and its synthesis method. Background Technology

[0002] Polyether polyols, as the core raw material for the synthesis of polyurethane materials, are widely used in various fields such as new energy vehicles, building energy conservation, high-end home furnishings, and biomedicine. Their performance directly determines the effectiveness and application value of downstream products. As end-market demands for product environmental friendliness, functionality, and stability continue to rise...

[0003] Hydroxyl value is the core factor determining the reactivity of polyether polyols and directly affects their suitability as raw materials for subsequent reactions. Existing processes lack effective control over the distribution of hydroxyl value, which can easily lead to excessive fluctuations in batch product yields, resulting in unstable downstream polymerization rates and poor consistency in key properties such as hardness and elasticity of the finished product.

[0004] In addition, viscosity, as an important indicator reflecting the regularity of molecular chain structure, is often significantly affected by insufficient control of raw material combination and reaction conditions in existing processes. This not only damages the fluidity and dispersion uniformity of the product during processing, but also leads to molding defects in downstream products, reducing production efficiency and finished product qualification rate.

[0005] Due to limitations in the sufficiency of polymerization reactions and refining technology, the existing process has poor acid value control, which easily leads to high acid value fluctuations. Excessively high acid values ​​can introduce acidic impurities, interfere with the activity of catalysts in downstream reactions, accelerate the aging and deterioration of finished products, and even cause corrosion to production equipment.

[0006] Based on this, the present invention designs a polyether polyol and its synthesis method to solve the above problems. Summary of the Invention

[0007] To address the aforementioned shortcomings of existing technologies, this invention provides a method for synthesizing polyether polyols, comprising the following steps: S1: Weigh the raw materials; 0-600g hydrogenated bisphenol A, 0-600g bisphenol A, 1-200g difunctional compounds containing active hydrogen, 0.79-4.9g basic catalyst, 310-1570g epoxides, 10-100g alicyclic hydrocarbons; S2: Polymerization reaction; Hydrogenated bisphenol A, bisphenol A, a difunctional compound containing active hydrogen, and an alkaline catalyst are added to a high-pressure reactor, purged with nitrogen, and heated to 90-130°C. Then, epoxides and alicyclic hydrocarbons are added to the reactor, and the temperature is further increased to 110-140°C. The polymerization reaction is carried out at 0.10-0.50 MPa. S3: Maturation; After the reaction is complete, it is matured for 3-4 hours under the polymerization reaction conditions of S2; S4: Demonomeric treatment; The reactor is evacuated and purged with nitrogen, and kept for 1-5 hours to obtain the precursor. S5: Cooling and refining; Cool to 80-90℃, add deionized water and then add phosphoric acid to neutralize to pH 4.8-5.2, add magnesium hexasilicate for adsorption, dry and filter to obtain polyether polyol.

[0008] Furthermore, the difunctional compound containing active hydrogen is one or more of propylene glycol, ethylene glycol, diethylene glycol, and diethylene glycol.

[0009] Furthermore, the alkaline catalyst is potassium hydroxide, sodium hydroxide, or sodium carbonate.

[0010] Furthermore, the epoxide is one or more of propylene oxide and ethylene oxide.

[0011] Furthermore, the alicyclic hydrocarbon is cyclohexane, cyclobutane, or cycloheptane.

[0012] Furthermore, S2 specifically involves: adding hydrogenated bisphenol A, bisphenol A, a difunctional compound containing active hydrogen, and an alkaline catalyst into a 5L high-pressure reactor at room temperature, purging with nitrogen 3-5 times, raising the temperature to 90-130℃ at 4-8℃ / min, then adding epoxides and alicyclic hydrocarbons to the reactor, and continuing to raise the temperature to 110-140℃ at 1-2℃ / min, and carrying out the polymerization reaction at 0.10-0.50MPa.

[0013] Furthermore, S4 specifically involves: opening the vacuum pump and vacuum valve to evacuate to -0.09 to -0.07 MPa, injecting nitrogen into the reactor until the pressure inside the reactor is -0.08 MPa to 0.07 MPa, maintaining this pressure for 1-5 hours to obtain the precursor.

[0014] Furthermore, S5 specifically involves: cooling to 80-90℃ at 3-6℃ / min, adding 3-8% of the total precursor mass of deionized water, adding 43.5% phosphoric acid to neutralize to pH 4.8-5.2, adding 0.1% of the total precursor mass of magnesium hexasilicate for adsorption, transferring to a drying oven, heating to 110-120℃ at 4-7℃ / min, drying to constant weight, and passing through a 200-mesh sieve to obtain polyether polyol.

[0015] A polyether polyol synthesized according to the described synthesis method.

[0016] Compared with the prior art, the beneficial effects of this invention are as follows: 1. This invention introduces alicyclic hydrocarbons and aromatic structures to form a block layout, optimizes the ratio of hydrogenated bisphenol A and bisphenol A and the combination of compounds containing two functional groups with active hydrogen, effectively solving the problems of uneven hydroxyl value distribution, excessive viscosity fluctuation and high viscosity in the prior art, ensuring the stability of product reactivity and processing fluidity, and ensuring the accuracy of formulation implementation and product molding quality in downstream applications.

[0017] 2. This invention optimizes polymerization temperature, pressure, and maturation time, combined with an efficient monomer removal process, ensuring the sufficiency of the polymerization reaction. Subsequent neutralization, adsorption, and filtration purification processes significantly reduce the product's acid value and impurity residue, effectively addressing the pain point of insufficient product purity in existing technologies. This improves product application stability and avoids the adverse effects of impurities on downstream reactions and equipment.

[0018] 3. By controlling the neutralization process parameters and the amount of adsorbent, combined with the filtration step, this invention achieves efficient removal of catalyst residues such as potassium / sodium ions, while maintaining the product's pH value stability, optimizing the consistency of the product's chemical environment, avoiding abnormal reaction problems caused by catalyst residues, and comprehensively improving the overall performance of the product. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] Example 1: This example provides a method for synthesizing polyether polyols, including the following steps: S1: Weigh the raw materials; 1g of hydrogenated bisphenol A (Mitsui Chemicals (Shandong) Co., Ltd., the same below), 99g of bisphenol A (Mitsui Chemicals (Shandong) Co., Ltd., the same below), 100g of a difunctional compound containing active hydrogen, 0.79g of alkaline catalyst, 490g of epoxide alkane, and 100g of alicyclic hydrocarbon; The bifunctional compound containing active hydrogen is a mixture of 1g propylene glycol and 99g diethylene glycol; The alkaline catalyst is sodium hydroxide; The epoxy alkane is propylene oxide; The alicyclic hydrocarbon is cyclobutane; S2: Polymerization reaction; Hydrogenated bisphenol A, bisphenol A, a difunctional compound containing active hydrogen and an alkaline catalyst were added to a 5L high-pressure reactor at room temperature. The reactor was purged with nitrogen five times and heated to 100°C at 8°C / min. Then, epoxides and alicyclic hydrocarbons were added to the reactor and the temperature was further increased to 120°C at 2°C / min. The polymerization reaction was carried out at 0.50MPa for 3 hours. S3: Maturation; After the reaction was completed, it was matured for 4 hours under the polymerization reaction conditions of S2; S4: Demonomeric treatment; Turn on the vacuum pump and vacuum valve to evacuate to -0.07 MPa, then purge nitrogen into the reactor until the pressure inside the reactor is 0.07 MPa. Maintain this pressure for 1 hour to obtain the precursor. S5: Cooling and refining; The temperature was lowered to 90℃ at 6℃ / min, 8% of the total mass of the precursor was added to deionized water, 43.5% of the concentration of phosphoric acid was added to neutralize to pH 5.2, 0.1% of the total mass of the precursor was added to adsorb, and the mixture was transferred to a drying oven and heated to 120℃ at 7℃ / min to dry to constant weight. The mixture was then passed through a 200-mesh sieve to obtain an aromatic-alicyclic hydrocarbon block polyether polyol.

[0021] Example 2: This example provides a method for synthesizing polyether polyols, including the following steps: S1: Weigh the raw materials; 99g hydrogenated bisphenol A, 1g bisphenol A, 100g difunctional compound containing active hydrogen, 3.95g basic catalyst, 490g epoxide alkane, 100g alicyclic hydrocarbon; The bifunctional compound containing active hydrogen is a mixture of 99g propylene glycol and 1g diethylene glycol; The alkaline catalyst is sodium hydroxide; The epoxy alkane is propylene oxide; The alicyclic hydrocarbon is cyclobutane; S2: Polymerization reaction; Hydrogenated bisphenol A, bisphenol A, a difunctional compound containing active hydrogen and an alkaline catalyst were added to a 5L high-pressure reactor at room temperature. The reactor was purged with nitrogen three times and heated to 100°C at 4°C / min. Then, epoxides and alicyclic hydrocarbons were added to the reactor and the temperature was further increased to 120°C at 1°C / min. The polymerization reaction was carried out at 0.10MPa for 3 hours. S3: Maturation; After the reaction was completed, it was matured for 4 hours under the polymerization reaction conditions of S2; S4: Demonomeric treatment; Turn on the vacuum pump and vacuum valve to evacuate to -0.09 MPa, then purge nitrogen into the reactor until the pressure inside the reactor is -0.08 MPa, maintain this pressure for 1 hour, and obtain the precursor. S5: Cooling and refining; The temperature was lowered to 80℃ at 3℃ / min, 3% of the total mass of the precursor was added to deionized water, 43.5% of the concentration of phosphoric acid was added to neutralize to pH 4.8, 0.1% of the total mass of the precursor was added to adsorb, and the mixture was transferred to a drying oven and heated to 110℃ at 4℃ / min to dry to constant weight. The mixture was then passed through a 200-mesh sieve to obtain an aromatic-alicyclic hydrocarbon block polyether polyol.

[0022] Example 3: This example provides a method for synthesizing polyether polyols, including the following steps: S1: Weigh the raw materials; 300g hydrogenated bisphenol A, 200g difunctional compounds containing active hydrogen, 2.4g basic catalyst, 420g epoxide alkane, 50g alicyclic hydrocarbon; The difunctional compound containing active hydrogen is propylene glycol; The alkaline catalyst is potassium hydroxide; The epoxy alkane is propylene oxide; The alicyclic hydrocarbon is cyclohexane; S2: Polymerization reaction; Hydrogenated bisphenol A, a difunctional compound containing active hydrogen, and an alkaline catalyst were added to a 5L high-pressure reactor at room temperature. The reactor was purged with nitrogen five times and heated to 90°C at 7°C / min. Then, epoxides and alicyclic hydrocarbons were added to the reactor, and the temperature was further increased to 110°C at 2°C / min. The polymerization reaction was carried out at 0.20MPa for 3 hours. S3: Maturation; After the reaction is complete, it is matured for 3 hours under the polymerization reaction conditions of S2; S4: Demonomeric treatment; Turn on the vacuum pump and vacuum valve to evacuate to -0.09 MPa, then purge nitrogen into the reactor until the pressure inside the reactor is -0.08 MPa. Maintain this pressure for 5 hours to obtain the precursor. S5: Cooling and refining; The temperature was lowered to 84℃ at 5℃ / min, 5% of the total mass of the precursor was added to deionized water, 43.5% of the concentration of phosphoric acid was added to neutralize to pH 5.0, 0.1% of the total mass of the precursor was added to adsorb, and the mixture was transferred to a drying oven and heated to 117℃ at 5℃ / min to dry to constant weight. The mixture was then passed through a 200-mesh sieve to obtain an aromatic-alicyclic hydrocarbon block polyether polyol. The structural formula of the aromatic-alicyclic hydrocarbon block polyether polyol is: .

[0023] Example 4: This example provides a method for synthesizing polyether polyols, including the following steps: S1: Weigh the raw materials; 150g hydrogenated bisphenol A, 150g bisphenol A, 150g difunctional compound containing active hydrogen, 4g basic catalyst, 490g epoxide alkane, 100g alicyclic hydrocarbon. The difunctional compound containing active hydrogen is propylene glycol; The alkaline catalyst is sodium hydroxide; The epoxy alkane is propylene oxide; The alicyclic hydrocarbon is cyclobutane; S2: Polymerization reaction; Hydrogenated bisphenol A, bisphenol A, a difunctional compound containing active hydrogen, and an alkaline catalyst were added to a 5L high-pressure reactor at room temperature. The reactor was purged with nitrogen five times, and the temperature was increased to 100°C at 7°C / min. Then, epoxides and alicyclic hydrocarbons were added to the reactor, and the temperature was increased to 120°C at 2°C / min. The polymerization reaction was carried out at 0.20MPa for 3 hours. S3: Maturation; After the reaction was completed, it was matured for 4 hours under the polymerization reaction conditions of S2; S4: Demonomeric treatment; Turn on the vacuum pump and vacuum valve to evacuate to -0.09 MPa, then purge nitrogen into the reactor until the pressure inside the reactor is -0.08 MPa, maintain this pressure for 1 hour, and obtain the precursor. S5: Cooling and refining; The temperature was lowered to 84℃ at 5℃ / min, 5% of the total mass of the precursor was added to deionized water, 43.5% of the concentration of phosphoric acid was added to neutralize to pH 5.0, 0.1% of the total mass of the precursor was added for adsorption with magnesium hexasilicate, the mixture was transferred to a drying oven, heated to 117℃ at 5℃ / min and dried to constant weight, and passed through a 200-mesh sieve to obtain aromatic-alicyclic hydrocarbon block polyether polyol.

[0024] Example 5: This example provides a method for synthesizing polyether polyols, including the following steps: S1: Weigh the raw materials; 600g hydrogenated bisphenol A, 200g difunctional compounds containing active hydrogen, 3.5g basic catalyst, 620g epoxide alkane, 10g alicyclic hydrocarbon; The difunctional compound containing active hydrogen is ethylene glycol; The alkaline catalyst is potassium hydroxide; The alkyl oxide is a mixture of 310g propylene oxide and 310g ethylene oxide; The alicyclic hydrocarbon is cyclohexane; S2: Polymerization reaction; Hydrogenated bisphenol A, a difunctional compound containing active hydrogen, and an alkaline catalyst were added to a 5L high-pressure reactor at room temperature. The reactor was purged with nitrogen five times and heated to 120°C at 7°C / min. Then, epoxides and alicyclic hydrocarbons were added to the reactor, and the temperature was further increased to 130°C at 2°C / min. The polymerization reaction was carried out at 0.20MPa for 3 hours. S3: Maturation; After the reaction was completed, it was matured for 4 hours under the polymerization reaction conditions of S2; S4: Demonomeric treatment; Turn on the vacuum pump and vacuum valve to evacuate to -0.09 MPa, then purge nitrogen into the reactor until the pressure inside the reactor is -0.08 MPa, maintain this pressure for 2 hours to obtain the precursor; S5: Cooling and refining; The temperature was lowered to 84℃ at 5℃ / min, 5% of the total mass of the precursor was added to deionized water, 43.5% of the concentration of phosphoric acid was added to neutralize to pH 5.0, 0.1% of the total mass of the precursor was added for adsorption with magnesium hexasilicate, the mixture was transferred to a drying oven, heated to 117℃ at 5℃ / min and dried to constant weight, and passed through a 200-mesh sieve to obtain aromatic-alicyclic hydrocarbon block polyether polyol.

[0025] The structural formula of the aromatic-alicyclic hydrocarbon block polyether polyol is: .

[0026] Example 6: This example provides a method for synthesizing polyether polyols, including the following steps: S1: Weigh the raw materials; 600g bisphenol A, 200g difunctional compounds containing active hydrogen, 4.9g basic catalyst, 1570g epoxides, and 90g alicyclic hydrocarbons; The difunctional compound containing active hydrogen is diethylene glycol; The alkaline catalyst is sodium carbonate; The epoxide is ethylene oxide; The alicyclic hydrocarbon is cycloheptane; S2: Polymerization reaction; Bisphenol A, a difunctional compound containing active hydrogen, and an alkaline catalyst were added to a 5L high-pressure reactor at room temperature. The reactor was purged with nitrogen five times and heated to 130°C at 7°C / min. Then, epoxides and alicyclic hydrocarbons were added to the reactor, and the temperature was further increased to 140°C at 2°C / min. The polymerization reaction was carried out at 0.20MPa for 3 hours. S3: Maturation; After the reaction was completed, it was matured for 4 hours under the polymerization reaction conditions of S2; S4: Demonomeric treatment; Turn on the vacuum pump and vacuum valve to evacuate to -0.09 MPa, then purge nitrogen into the reactor until the pressure inside the reactor is -0.08 MPa, maintain this pressure for 1 hour, and obtain the precursor. S5: Cooling and refining; The temperature was lowered to 84℃ at 5℃ / min, 5% of the total mass of the precursor was added to deionized water, 43.5% of the concentration of phosphoric acid was added to neutralize to pH 5.0, 0.1% of the total mass of the precursor was added for adsorption with magnesium hexasilicate, the mixture was transferred to a drying oven, heated to 117℃ at 5℃ / min and dried to constant weight, and passed through a 200-mesh sieve to obtain aromatic-alicyclic hydrocarbon block polyether polyol.

[0027] Comparative Example 1: This comparative example differs from Example 6 in that 300g of hydrogenated bisphenol A, 200g of propylene glycol, and 2.4g of potassium hydroxide were added to a 5L high-pressure reactor at room temperature, purged with nitrogen three times, heated to 90°C, and 470g of propylene oxide were added to the reactor. The polymerization reaction was carried out at 110°C. After the reaction was completed, the reactor was allowed to mature for 3 hours, and the monomer was removed for 1 hour. Then, the reactor was cooled and purified to obtain an aromatic-alicyclic hydrocarbon block polyether polyol. The remaining reaction conditions remained unchanged.

[0028] Comparative Example 2: This comparative example differs from Example 6 in that 150g of hydrogenated bisphenol A, 150g of bisphenol A, 150g of propylene glycol, and 4g of sodium hydroxide were added to a 5L high-pressure reactor at room temperature, purged with nitrogen three times, heated to 100°C, and 590g of propylene oxide were added to the reactor. The polymerization reaction was carried out at 120°C. After the reaction was completed, the reactor was allowed to mature for 4 hours, and the monomer was removed for 1 hour. The reactor was then cooled and purified to obtain an aromatic-alicyclic hydrocarbon block polyether polyol. The remaining reaction conditions remained unchanged.

[0029] Comparative Example 3: This comparative example differs from Example 6 in that 600g of hydrogenated bisphenol A, 200g of ethylene glycol, and 3.5g of potassium hydroxide were added to a 5L high-pressure reactor at room temperature, purged with nitrogen five times, and heated to 120°C. 315g of ethylene oxide and 315g of propylene oxide were then added to the reactor for polymerization at 130°C. After the reaction was completed, the reactor was allowed to mature for 4 hours, followed by monomer removal for 1 hour, and then cooled and purified to obtain an aromatic-alicyclic block polyether polyol. The remaining reaction conditions remained unchanged.

[0030] Comparative Example 4: This comparative example differs from Example 6 in that 600g of bisphenol A, 200g of diethylene glycol, and 4.9g of sodium carbonate were added to a 5L high-pressure reactor at room temperature, purged with nitrogen four times, heated to 130°C, and 1660g of ethylene oxide was added to the reactor. The polymerization reaction was carried out at 140°C. After the reaction was completed, the reactor was allowed to mature for 4 hours, and the monomer was removed for 1 hour. The reactor was then cooled and purified to obtain an aromatic-alicyclic hydrocarbon block polyether polyol. The remaining reaction conditions remained unchanged.

[0031] Comparative Example 5: This comparative example differs from Example 6 in that 600g of bisphenol A and 2.9g of sodium carbonate were added to a 5L high-pressure reactor at room temperature, purged with nitrogen four times, heated to 130°C, and 800g of ethylene oxide was added to the reactor. The polymerization reaction was carried out at 140°C. After the reaction was completed, the reactor was allowed to mature for another 4 hours, and the monomer was removed for 1 hour. The reactor was then cooled and purified to obtain an aromatic-alicyclic hydrocarbon block polyether polyol. The remaining reaction conditions remained unchanged.

[0032] Experimental Example 1: The hydroxyl value (mgKOH / g) of the polyether polyol prepared in this invention was tested according to GB / T 12008.3-2009.

[0033] Experimental Example 2: The viscosity (25℃, mPa·s) of the polyether polyol prepared in this invention was tested according to GB / T 12008.7-2010.

[0034] Experimental Example 3: The acid value (mgKOH / g) of the polyether polyol prepared in this invention was tested according to GB / T 12008.5-2010.

[0035] Experimental Example 4: The potassium / sodium ion content (ppm) of the polyether polyol prepared in this invention was determined according to GB / T 12008.4-2009.

[0036] The results are shown in the table below: As shown in the table above, the data from Examples 1-6 are more balanced and stable, with a reasonable distribution of hydroxyl values. This ensures the activity requirements of the polyether polyol as a reaction raw material while avoiding extreme high or low values, thus meeting the basic requirements for subsequent processing applications. The overall viscosity fluctuation is small, indicating that by reasonably controlling the ratio of hydrogenated bisphenol A to bisphenol A, and the type and amount of alicyclic hydrocarbons, the regularity of the molecular chain structure was successfully controlled, avoiding viscosity abnormalities caused by molecular aggregation or chain segment disorder. The acid values ​​are all maintained at low levels and are concentrated, reflecting the sufficiency of the polymerization reaction and the effectiveness of the purification process, reducing the impact of impurity residues on product stability. The potassium / sodium ion content is low, indicating the precision of the neutralization, adsorption, and filtration processes, effectively reducing the adverse effects of catalyst residues. The pH value is also within a stable range, reflecting that the product's acid-base balance is well controlled, providing a stable chemical environment for subsequent applications. This indicates that the introduction of alicyclic hydrocarbons and the aromatic structure form a block structure, and the synergistic optimization of polymerization temperature, pressure, ripening time, and monomer removal process, with each step working together, ultimately achieves a synergistic improvement in product performance.

[0037] Some comparative examples did not use alicyclic hydrocarbon raw materials, resulting in significantly higher product viscosity, far exceeding that of the examples. This indicates that the introduction of alicyclic hydrocarbons plays an important role in regulating product flowability, and without this component, it is impossible to effectively control the viscosity of the product. The comparative examples adjusted the types and ratios of hydrogenated bisphenol A, bisphenol A, difunctional compounds containing active hydrogen, or epoxides. The acid values ​​were significantly higher than those in the examples, reflecting the insufficient compatibility of this type of raw material combination. It failed to ensure the full progress of the polymerization reaction, resulting in an increase in the content of residual impurities in the product, affecting the purity and application stability of the product. Some comparative examples did not contain bifunctional compounds with active hydrogen, and their viscosity was more than twice that of the examples. Their acid values ​​were also significantly higher than those of all examples, and their pH values ​​deviated from the range of the examples. This deficiency would disrupt the reaction balance, leading not only to abnormal product viscosity but also to acid-base imbalance.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for synthesizing polyether polyols, characterized in that, Includes the following steps: S1: Weigh the raw materials; 0-600g hydrogenated bisphenol A, 0-600g bisphenol A, 1-200g difunctional compounds containing active hydrogen, 0.79-4.9g basic catalyst, 310-1570g epoxides, 10-100g alicyclic hydrocarbons; S2: Polymerization reaction; Hydrogenated bisphenol A, bisphenol A, a difunctional compound containing active hydrogen, and an alkaline catalyst are added to a high-pressure reactor, purged with nitrogen, and heated to 90-130°C. Then, epoxides and alicyclic hydrocarbons are added to the reactor, and the temperature is further increased to 110-140°C. The polymerization reaction is carried out at 0.10-0.50 MPa. S3: Maturation; After the reaction is complete, it is matured for 3-4 hours under the polymerization reaction conditions of S2; S4: Demonomeric treatment; The reactor is evacuated and purged with nitrogen, and kept for 1-5 hours to obtain the precursor. S5: Cooling and refining; Cool to 80-90℃, add deionized water and then add phosphoric acid to neutralize to pH 4.8-5.2, add magnesium hexasilicate for adsorption, dry and filter to obtain polyether polyol.

2. The method for synthesizing polyether polyols according to claim 1, characterized in that, The difunctional compound containing active hydrogen is one or more of propylene glycol, ethylene glycol, diethylene glycol, and diethylene glycol.

3. The method for synthesizing polyether polyols according to claim 1, characterized in that, The alkaline catalyst is potassium hydroxide, sodium hydroxide, or sodium carbonate.

4. The method for synthesizing polyether polyols according to claim 1, characterized in that, The epoxide is one or more of propylene oxide and ethylene oxide.

5. The method for synthesizing polyether polyols according to claim 1, characterized in that, The alicyclic hydrocarbon is cyclohexane, cyclobutane, or cycloheptane.

6. The method for synthesizing polyether polyols according to claim 1, characterized in that, S2 specifically involves: adding hydrogenated bisphenol A, bisphenol A, a difunctional compound containing active hydrogen, and an alkaline catalyst into a 5L high-pressure reactor at room temperature, purging with nitrogen 3-5 times, raising the temperature to 90-130℃ at 4-8℃ / min, then adding epoxides and alicyclic hydrocarbons to the reactor, and continuing to raise the temperature to 110-140℃ at 1-2℃ / min, and carrying out the polymerization reaction at 0.10-0.50MPa.

7. The method for synthesizing polyether polyols according to claim 1, characterized in that, S4 specifically involves: turning on the vacuum pump and vacuum valve to evacuate to -0.09 to -0.07 MPa, then injecting nitrogen into the reactor until the pressure inside the reactor is -0.08 MPa to 0.07 MPa, maintaining this pressure for 1-5 hours to obtain the precursor.

8. The method for synthesizing polyether polyols according to claim 1, characterized in that, S5 is specifically prepared as follows: the temperature is lowered to 80-90℃ at 3-6℃ / min, 3-8% of the total mass of the precursor is added to deionized water, 43.5% of phosphoric acid is added to neutralize to pH 4.8-5.2, 0.1% of the total mass of the precursor is added to adsorb, the mixture is transferred to a drying oven, the temperature is raised to 110-120℃ at 4-7℃ / min and dried to constant weight, and then passed through a 200-mesh sieve to obtain polyether polyol.

9. A polyether polyol synthesized by the synthesis method according to any one of claims 1-8.

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