A low pour point block polyether and its preparation method and application

Abstract

The present invention discloses a low pour point block polyether and a preparation method and application thereof. The block polyether has a structure as shown in Formula I: #imgabs0# wherein m is an integer of 1 to 6; R1 represents C 1‑18 Alkyl, C 1‑18 Alkylene, C 1‑18 Alkyl ether group, C 1‑18 Alkylene ether, substituted or unsubstituted C 6‑40 Aryl; R2 represents an alkylene oxide polymer segment having 3-18 carbon atoms; R3 represents an alkylene oxide polymer segment having 2-18 carbon atoms; R4 represents an ethylene oxide polymer segment, i.e. #imgabs1#0

Description

Technical Field

[0001] The invention belongs to the field of polyether synthesis, and specifically relates to a low pour point block polyether and a preparation method and application thereof. Background Art

[0002] Polyether is a polymer prepared by polymerization reaction of ethylene oxide, propylene oxide, butylene oxide, etc. with different initiators in the presence of a catalyst.

[0003] As an important means of production, pesticides play an irreplaceable role in promoting agricultural production, increasing farmers' income and effectively supplying agricultural products. Emulsifiers, dispersants and other surface active additives are used in the processing of pesticide formulations. For example, emulsifiers need to be added when preparing emulsifiable concentrates, water emulsions, microemulsions and other dosage forms, and dispersants need to be added when preparing wettable powders, water-dispersible granules, suspensions and other dosage forms.

[0004] Block polyethers are polymers prepared by polymerization reaction of ethylene oxide, propylene oxide, butylene oxide, etc. with different initiators under the action of catalysts. Block polyether surfactants have good emulsification and dispersion properties, and are increasingly used as key emulsifiers, dispersants and other adjuvants in pesticide formulations. Propylene oxide / ethylene oxide block copolymers can be used in a variety of dosage forms such as emulsifiable concentrates, emulsions in water, microemulsions, wettable powders, water-dispersible granules, suspensions, etc., and have a wide range of applicability.

[0005] The block polyether obtained by polymerization of fatty alcohols, ethylene oxide (EO) and propylene oxide (PO) as raw materials is an excellent surfactant with low skin irritation, low toxicity, acid-base stability, no dissociation into ionic state in water, high stability, and not easily affected by the presence of strong electrolytes. By adjusting the ratio of EO to PO, a series of products with different EO and PO block lengths can be obtained, with a wide hydrophile-lipophile balance (HLB value). Products with different HLB values ​​can be used in various fields, with good washing, emulsification, dispersion, foaming, wetting, solubilization and other properties, and have important applications in industrial and agricultural fields such as pesticides, medicines, cosmetics, and petroleum.

[0006] The high molecular block polyether obtained by polymerization of fatty alcohol, ethylene oxide and propylene oxide as raw materials has a structure of fatty alcohol plus propylene oxide to form a lipophilic segment, and then ethylene oxide is added to form a hydrophilic segment, forming a typical amphiphilic structure of surfactants. However, this typical amphiphilic structure has certain disadvantages: the pour point is high, generally above 30°C, and it is solid at room temperature. It needs to be heated and melted before use, or solvents are added to make it liquid before use, which is inconvenient to use, increases the cost of use, and limits its use. Although simply increasing the chain length of the propylene oxide polymerization segment can reduce the pour point, it enhances the lipophilicity and reduces the hydrophilicity, which seriously damages its application performance. Therefore, it is technically difficult to reduce the pour point of polyether while maintaining the original hydrophilicity and lipophilicity. Summary of the invention

[0007] The present invention provides a block polyether having a structure as shown in Formula I:

[0008]

[0009] Wherein, m is an integer from 1 to 6;

[0010] R1 represents C 1-18 Alkyl, C 1-18 Alkylene, C 1-18 Alkyl ether group, C 1-18 Alkylene ether, substituted or unsubstituted C 6-40 Aryl (preferably alkyl-substituted C 6-40 Aryl), preferably C 1-8 Alkyl, C 1-8 Alkylene, C 1-8 Alkyl ether group, C 1-8 Alkylene ether, substituted or unsubstituted C 6-20 Aryl (preferably alkyl-substituted C 6-20 aryl), more preferably CH3-, CH3CH2-, CH3CH2CH2-, CH3CH2CH2CH2-, -CH2CH2-, -CH2CH2CH2-, -CH2CH2OCH2CH2-, -CH2CH2CH2OCH2CH2CH2-, -(CH2)5CH(CH3)2,

[0011]

[0012] R2 represents an alkylene oxide polymer segment having 3 to 18 carbon atoms; for example, the R2 segment contains structural unit A, and one, two or three of structural unit B, structural unit C and structural unit D:

[0013]

[0014] 0 < a1 ≤ 100, a2 is any number selected from the continuous range of 0 - 20, a3 is any number selected from the continuous range of 0 - 20, a4 is any number selected from the continuous range of 0 - 20;

[0015] Preferably, a2, a3, and a4 are not simultaneously 0;

[0016] R3 represents an epoxyalkyl polymer segment having 2 - 18 carbon atoms; for example, the R3 segment contains structural unit A’, and one, two, or more of structural unit B’, structural unit C’, structural unit D’, and structural unit E’:

[0017]

[0018] 0 < b1 ≤ 100, b2 is any number selected from the continuous range of 0 - 20, b3 is any number selected from the continuous range of 0 - 20, b4 is any number selected from the continuous range of 0 - 20, b5 is any number selected from the continuous range of 0 - 20, and b2, b3, b4, and b5 are not simultaneously 0;

[0019] R4 represents an ethyleneoxyethylene oxide polymer segment, that is 0 < c1 ≤ 40.

[0020] According to an embodiment of the present invention, there is no particular limitation on the arrangement order of structural unit B, structural unit C, and structural unit D, and any one of them can be optionally connected to structural unit A.

[0021] According to an embodiment of the present invention, structural unit A, and at least one of structural unit B, structural unit C, and structural unit D can be arranged randomly or in blocks.

[0022] According to an embodiment of the present invention, there is no particular limitation on the arrangement order of structural unit B’, structural unit C’, structural unit D’, and structural unit E’, and any one of them can be optionally connected to structural unit A’.

[0023] According to an embodiment of the present invention, structural unit A’, and at least one of structural unit B’, structural unit C’, structural unit D’, and structural unit E’ can be arranged randomly or in blocks.

[0024] According to an embodiment of the present invention, structural unit A’ is obtained by polymerizing ethylene oxide.

[0025] According to an embodiment of the present invention, both structural unit A and structural unit B’ are obtained by polymerizing propylene oxide.

[0026] According to an embodiment of the present invention, both structural unit B and structural unit C’ are obtained by polymerizing butylene oxide.

[0027] According to an embodiment of the present invention, both the structural unit C and the structural unit D' are obtained by polymerizing pentene oxide and / or cyclopentene oxide.

[0028] According to an embodiment of the present invention, both the structural unit D and the structural unit E' are obtained by polymerizing hexene oxide and / or cyclohexene oxide.

[0029] According to an embodiment of the present invention, the R2 segment may contain the structural unit A and the structural unit D, and the structural unit A and the structural unit D are arranged randomly or in blocks:

[0030]

[0031] According to an embodiment of the present invention, the R2 segment may contain the structural unit A and the structural unit B, and the structural unit A and the structural unit B are arranged randomly or in blocks:

[0032]

[0033] According to an embodiment of the present invention, 10 < a1 ≤ 80; for example, 20 ≤ a1 ≤ 60; exemplarily, a1 is selected from 5, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100.

[0034] According to an embodiment of the present invention, a2, a3, and a4 are the same or different. For example, 2 ≤ a2 ≤ 15, 2 ≤ a3 ≤ 15, 2 ≤ a4 ≤ 15; exemplarily, a2, a3, and a4 are each independently selected from 0, 1, 2, 3, 5, 7, 7.5, 10, 12, 13.5, 15, 18, 20.

[0035] According to an embodiment of the present invention, the R3 segment may contain the structural unit A' and the structural unit E', and the structural unit A' and the structural unit E' are arranged randomly or in blocks:

[0036]

[0037] According to an embodiment of the present invention, the R3 segment may contain the structural unit A' and the structural unit C', and the structural unit A' and the structural unit C' are arranged randomly or in blocks:

[0038]

[0039] According to an embodiment of the present invention, 10 < b1 ≤ 80; for example, 20 ≤ b1 ≤ 60; exemplarily, b1 is selected from 5, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100.

[0040] According to an embodiment of the present invention, b2, b3, b4, and b5 are the same or different, for example, 2≤b2≤15, 2≤b3≤15, 2≤b4≤15, and 2≤b5≤15; illustratively, b2, b3, b4, and b5 are independently selected from 0, 1, 2, 3, 5, 7, 7.5, 10, 12, 13.5, 15, 18, and 20.

[0041] According to an embodiment of the present invention, 5≤c1≤30, for example, 10≤c1≤25; illustratively, c1 is selected from 1, 2, 3, 5, 8, 10, 12, 15, 20, 25, 30, 35, and 40.

[0042] According to an embodiment of the present invention, m may be selected from 1, 2, 3, 4, 5 or 6.

[0043] According to an exemplary embodiment of the present invention, the block polyether may have any one of the following structures of Formula 1 to Formula 7:

[0044]

[0045]

[0046]

[0047] According to an embodiment of the present invention, the pour point of the block polyether is lower than 15°C, for example, 0-15°C, exemplified by 5°C, 5.5°C, 9°C, 9.5°C, 10°C, 11°C, 13°C.

[0048] According to an embodiment of the present invention, the cloud point of the block polyether is 57-70° C., for example, 60-68° C., exemplified by 60.2° C., 61.5° C., 64.4° C., 65.2° C., 66.4° C., 67.4° C. The test medium for the cloud point is a 5% sodium chloride aqueous solution.

[0049] The present invention also provides a method for preparing the above-mentioned block polyether, comprising the following steps:

[0050] (1) Synthesis of lipophilic segment polyether: In the presence of catalyst A, the initiator and the first olefin oxide undergo polymerization reaction to obtain the lipophilic segment polyether;

[0051] The first olefin oxide contains at least propylene oxide; for example, the first olefin oxide may also contain one, two or more of butylene oxide, pentyl oxide, hexyl oxide, cyclopentane oxide and cyclohexane oxide;

[0052] (2) Synthesis of hydrophilic segment polyether: In the presence of catalyst B, the lipophilic segment polyether is polymerized with the second oxidized olefin to obtain a hydrophilic segment polyether; the hydrophilic segment polyether is capped with ethylene oxide, and acid is added for neutralization to obtain the block polyether;

[0053] The second olefin oxide contains at least ethylene oxide; for example, the second olefin oxide may also contain one, two or more of propylene oxide, butylene oxide, pentyl oxide, hexyl oxide, cyclopentane oxide and cyclohexene oxide.

[0054] According to an embodiment of the present invention, the catalyst A and catalyst B are both alkaline catalysts. Catalyst A and catalyst B are the same or different, and can be independently selected from one, two or more of metallic sodium, metallic potassium, sodium hydride, potassium hydroxide, sodium hydroxide, sodium methoxide, potassium methoxide, sodium ethoxide and potassium ethoxide; preferably, catalyst A and catalyst B are different. For example, catalyst A is preferably one, two or more of potassium hydroxide, metallic sodium, sodium hydride, sodium methoxide and potassium methoxide. For example, catalyst B is preferably one, two or more of potassium hydroxide, sodium methoxide and potassium methoxide. For another example, the amount of catalyst A is 0.01-3.0% of the sum of the mass of the initiator and the first olefin oxide in step (1). For another example, the amount of catalyst B is 0.01-3.0% of the sum of the mass of the lipophilic segment polyether and the second olefin oxide and ethylene oxide in step (1).

[0055] According to an embodiment of the invention, the initiator may be selected from one, two or more of the monohydric alcohol, dihydric alcohol, trihydric alcohol and tetrahydric alcohol containing R1, and the R1 has the meaning as shown above. For example, the monohydric alcohol is selected from one, two or more of methanol, ethanol, propanol, butanol, isooctyl alcohol, p-cresol, styrenated phenol and tristyrylphenol. For example, the dihydric alcohol is selected from one, two or more of ethylene glycol, propylene glycol, diethylene glycol and dipropylene glycol, etc. For example, the trihydric alcohol is selected from one, two or more of glycerol (glycerol) and trimethylolpropane, etc. For example, the tetrahydric alcohol is selected from one, two or more of pentaerythritol, etc.

[0056] Wherein, the R1 group in the block polyether is provided by an initiator.

[0057] According to an embodiment of the present invention, in step (1), in the first olefin oxide, the polymerization mode of propylene oxide and other alkylene oxides can be random copolymerization of propylene oxide and one, two or more of butylene oxide, pentyl oxide, hexyl oxide, cyclopentyl oxide and cyclohexyl oxide, or can be block polymerization of propylene oxide and one, two or more of butylene oxide, pentyl oxide, hexyl oxide, cyclopentyl oxide and cyclohexyl oxide.

[0058] Wherein, the R2 segment in the block polyether is provided by the first oxidized olefin.

[0059] When block polymerization occurs, the order of adding the first olefin oxide is not particularly limited. For example, monomer A may be introduced into the reactor first, reacted until the pressure no longer decreases, and then monomer B may be introduced, and the reaction is continued until the pressure no longer decreases.

[0060] And / or, based on the above, monomer C can be introduced as needed to continue the reaction until the pressure no longer decreases;

[0061] And / or, based on the above, after the polymerization of monomer C is completed, monomer D is further added;

[0062] At least one of the monomers A, B, C and D is propylene oxide, and the other monomers are selected from butylene oxide, pentyl oxide, hexyl oxide, cyclopentane oxide or cyclohexene oxide.

[0063] Among them, when random copolymerization occurs, a blend of monomers containing propylene oxide can be first introduced into the reactor and reacted until the pressure no longer decreases; the blend can contain one, two or more of butylene oxide, pentyl oxide, hexyl oxide, cyclopentane oxide and cyclohexene oxide.

[0064] According to an embodiment of the present invention, the structure of the lipophilic segment polyether is as follows:

[0065]

[0066] wherein R1, R2 and m have the meanings as indicated above.

[0067] According to an embodiment of the present invention, in step (1), the polymerization reaction temperature is 60-180°C, preferably 90-170°C, exemplified by 90°C, 100°C, 110°C, 120°C, and 130°C.

[0068] According to an embodiment of the present invention, in step (1), the first olefin oxide is continuously introduced into the reaction vessel. For example, the pressure of the first olefin oxide is 0.1-0.8 MPa, preferably 0.2-0.6 MPa, exemplified by 0.2 MPa, 0.3 MPa, 0.4 MPa, 0.5 MPa.

[0069] According to an embodiment of the present invention, in step (1), when the polymerization reaction is continued until the pressure in the reaction container no longer changes, the monomer reaction is complete.

[0070] According to an embodiment of the present invention, in step (2), in the second olefin oxide, the polymerization mode of ethylene oxide and other alkylene oxides can be random copolymerization of ethylene oxide and one, two or more of propylene oxide, butylene oxide, pentyl oxide, hexyl oxide, cyclopentyl oxide and cyclohexyl oxide, or block polymerization of ethylene oxide and one, two or more of propylene oxide, butylene oxide, pentyl oxide, hexyl oxide, cyclopentyl oxide and cyclohexyl oxide.

[0071] Wherein, the R3 segment in the block polyether is provided by the second oxidized olefin.

[0072] When block polymerization occurs, the order of adding the second olefin oxide is not particularly limited. For example, monomer A' may be introduced into the reactor first, reacted until the pressure no longer decreases, and then monomer B' may be introduced, and the reaction is continued until the pressure no longer decreases.

[0073] And / or, based on the above, monomer C' can be introduced as needed to continue the reaction until the pressure no longer decreases;

[0074] and / or, based on the above, after the polymerization of monomer C' is completed, monomer D' is further added;

[0075] and / or, based on the above, after the polymerization of monomer D' is completed, monomer E' is further added;

[0076] At least one of the monomers A', B', C', D' and E' is ethylene oxide, and the other monomers are selected from propylene oxide, butylene oxide, pentyl oxide, hexyl oxide, cyclopentane oxide or cyclohexene oxide.

[0077] Among them, when random copolymerization occurs, a blend of monomers containing ethylene oxide can be first introduced into the reactor and reacted until the pressure no longer decreases; the blend can contain one, two or more of propylene oxide, butylene oxide, pentyl oxide, hexyl oxide, cyclopentane oxide or cyclohexene oxide.

[0078] According to an embodiment of the present invention, the structure of the hydrophilic segment polyether is as follows:

[0079]

[0080] wherein R1, R2, R3 and m have the meanings as indicated above.

[0081] According to an embodiment of the present invention, in step (2), the temperatures of the polymerization reaction and the end-capping are the same or different and are independently selected from 60 to 180°C, preferably 90 to 170°C. Exemplarily, the polymerization reaction temperature and the end-capping temperature are independently selected from 90°C, 100°C, 110°C, 120°C or 130°C.

[0082] According to an embodiment of the present invention, in step (2), the second olefin oxide is continuously introduced into the reaction vessel. For example, the pressure of the second olefin oxide is 0.1-0.8 MPa, preferably 0.2-0.6 MPa, exemplified by 0.2 MPa, 0.3 MPa, 0.4 MPa, 0.5 MPa.

[0083] According to an embodiment of the present invention, in step (2), when the reaction pressure no longer changes, ethylene oxide is added to the system for end-capping. Preferably, the ethylene oxide is added and reacted until the pressure no longer changes, and the reaction of the ethylene oxide is complete.

[0084] The R4 segment in the block polyether is provided by ethylene oxide as a capping agent.

[0085] According to an embodiment of the present invention, in step (2), the acid may be selected from one, two or more of acetic acid, lactic acid and citric acid.

[0086] Preferably, the solution is neutralized to a neutral pH, wherein the neutral pH refers to a pH of 6-7.

[0087] The present invention also provides the use of the block polyether in a pesticide formulation product. For example, the pesticide formulation product can be an emulsifiable concentrate, an emulsion in water, a microemulsion, a wettable powder, a water-dispersible granule or a suspension.

[0088] The invention provides an emulsifiable concentrate containing the above-mentioned block polyether.

[0089] According to an embodiment of the present invention, the emulsifiable concentrate further contains pyraclostrobin, calcium dodecylbenzenesulfonate and solvent oil.

[0090] Preferably, the emulsifiable concentrate contains, by weight, 1-10 parts of the above-mentioned block polyether, 15-35 parts of pyraclostrobin, 0.5-6 parts of calcium dodecylbenzenesulfonate, and solvent oil to make up to 100 parts.

[0091] For example, the emulsifiable concentrate contains 6 parts of the above-mentioned block polyether, 25 parts of pyraclostrobin, 3 parts of calcium dodecylbenzenesulfonate, and 100 parts of solvent oil in parts by weight.

[0092] According to an embodiment of the present invention, the emulsifiable concentrate is obtained by mixing raw materials containing the above-mentioned block polyether, pyraclostrobin, calcium dodecylbenzene sulfonate and solvent oil.

[0093] The present invention also provides a suspending agent, which contains the above-mentioned block polyether.

[0094] According to an embodiment of the present invention, the suspending agent further contains difenoconazole, naphthalenesulfonate formaldehyde condensate, lauryl alcohol ether, a thickener, an antifreeze agent, a preservative and deionized water.

[0095] Preferably, the suspending agent contains, by weight, 0.5-10 parts of the above-mentioned block polyether, 25-50 parts of difenoconazole, 0.5-5 parts of naphthalenesulfonate formaldehyde condensate, 0.1-2 parts of lauryl alcohol ether, 0.01-0.3 parts of thickener, 1-7 parts of antifreeze, 0.01-0.2 parts of preservative, and 100 parts of deionized water.

[0096] Illustratively, in parts by weight, the suspending agent contains 3 parts of the above-mentioned block polyether, 40 parts of difenoconazole, 2 parts of naphthalenesulfonate formaldehyde condensate, 1 part of lauryl alcohol ether, 0.15 parts of thickener, 4 parts of antifreeze agent, 0.1 parts of preservative, and 100 parts of deionized water.

[0097] According to an embodiment of the present invention, the suspending agent is obtained by mixing raw materials containing the above-mentioned block polyether, difenoconazole, naphthalenesulfonate formaldehyde condensate, lauryl alcohol ether, a thickener, an antifreeze agent, a preservative and deionized water.

[0098] Beneficial effects of the present invention:

[0099] The preparation of the low pour point block polyether provided by the present invention is divided into the synthesis of two parts: a lipophilic segment and a hydrophilic segment: (1) the lipophilic segment is prepared by random copolymerization or block polymerization of a starting alcohol and an alkylene oxide monomer containing at least propylene oxide (also containing at least one of butylene oxide, pentylene oxide, hexylene oxide, cyclopentylene oxide and cyclohexylene oxide), so as to further improve the molecular lipophilicity and the flexibility of the molecular structure; (2) the hydrophilic segment is prepared by random copolymerization or multi-block polymerization of ethylene oxide and at least one of propylene oxide, butylene oxide, pentylene oxide, hexylene oxide, cyclopentylene oxide and cyclohexylene oxide, so as to reduce the pour point and maintain water solubility, and then the water solubility is improved by end-capping with ethylene oxide blocks.

[0100] The present invention increases one or more mixtures of butylene oxide, pentylene oxide, hexylene oxide, cyclopentylene oxide and cyclohexylene oxide by random copolymerization or block polymerization on the basis of oleophilic segment polypropylene oxide, thereby further improving the lipophilicity and flexibility of the molecular structure; increases one or more mixtures of propylene oxide, butylene oxide, pentylene oxide, hexylene oxide, cyclopentylene oxide and cyclohexylene oxide by random copolymerization or multi-block polymerization on the basis of hydrophilic segment polyethylene oxide, thereby improving the flexibility of the hydrophilic segment molecular structure, having the characteristics of being difficult to solidify at low temperature, and maintaining hydrophilicity; and then improves water solubility by ethylene oxide block capping. The present invention increases the molecular weight of polyether by adjusting the polyether structure, maintains the hydrophilicity and lipophilicity of common ethylene oxide and propylene oxide block polyethers, and reduces the pour point of polyether, does not use additives, has no adverse effects on the environment, and the polyether is in a liquid state at room temperature. Downstream manufacturers do not need to heat and melt the block polyether when using it, and can use it directly at room temperature, which has the advantages of convenience, speed and environmental protection.

[0101] Glossary and Definitions

[0102] Unless otherwise defined, all technical terms herein have the same meaning as commonly understood by persons skilled in the art to which the subject matter of the claims pertains. Unless otherwise indicated, all patents, patent applications, and public materials cited herein are incorporated herein by reference in their entirety. If there are multiple definitions of a term herein, the definition in this section shall prevail.

[0103] When the numerical ranges recorded in the specification and claims of this application can only be "integers", it should be understood that the two endpoints of the range and each integer in the range are recorded. For example, "an integer from 1 to 6" should be understood as recording each integer of 1, 2, 3, 4, 5, and 6. When the description of the numerical range is "number", that is, not limited to "integer", it should be understood as recording each integer and each decimal, and the decimal includes the sum of each integer and 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 or 0.9. For example, “a number from 0 to 20” should be understood to include every integer and every decimal of 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, and 20, and the decimal includes the sum of each of the above integers and 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 or 0.9 respectively.

[0104] The term "C 1-18 The term "alkyl" is understood to mean a straight-chain or branched saturated monovalent hydrocarbon radical having 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 carbon atoms, preferably a C 1-8 Alkyl. The alkyl group is, for example, methyl, ethyl, propyl, butyl, pentyl, hexyl, isopropyl, isobutyl, sec-butyl, tert-butyl, isopentyl, 2-methylbutyl, 1-methylbutyl, 1-ethylpropyl, 1,2-dimethylpropyl, neopentyl, 1,1-dimethylpropyl, 4-methylpentyl, 3-methylpentyl, 2-methylpentyl, 1-methylpentyl, 2-ethylbutyl, 1-ethylbutyl, 3,3-dimethylbutyl, 2,2-dimethylbutyl, 1,1-dimethylbutyl, 2,3-dimethylbutyl, 1,3-dimethylbutyl or 1,2-dimethylbutyl, etc. or isomers thereof. In particular, the group is a straight or branched saturated monovalent hydrocarbon group having 1, 2, 3 or 4 carbon atoms. The alkyl group is, for example, methyl, ethyl, propyl, butyl, isopropyl, isobutyl, sec-butyl, tert-butyl.

[0105] The term "C 1-18The term "alkylene" is understood to mean a straight-chain or branched alkylene radical having 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17 or 18 carbon atoms, preferably C 1-8 Alkylene.

[0106] The term "C 1-18 The term "alkyl ether group" is understood to mean a straight-chain or branched alkyl ether group having 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17 or 18 carbon atoms, preferably a C 1-8 Alkyl ether group.

[0107] The term "C 1-18 The term "alkylene ether group" is understood to mean a straight-chain or branched alkylene ether group having 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17 or 18 carbon atoms, preferably a C 1-8 Alkylene ether group.

[0108] The term "C 6-40 "Aryl" is understood to mean preferably a monovalent aromatic or partially aromatic monocyclic, bicyclic (such as fused, bridged, spiro) or tricyclic hydrocarbon ring having 6 to 40 carbon atoms, which may be a single aromatic ring or a polyaromatic ring fused together. 6-20 The term "aryl" is understood to mean preferably a monovalent aromatic or partially aromatic monocyclic, bicyclic or tricyclic hydrocarbon ring ("C 6-14 or a ring having 9 carbon atoms ("C9 aryl"), for example indanyl or indenyl, or a ring having 10 carbon atoms ("C 10 aryl), such as tetrahydronaphthyl, dihydronaphthyl or naphthyl, or a ring having 13 carbon atoms ("C 13 aryl), such as fluorenyl, or a ring having 14 carbon atoms ("C 14 aryl”), such as anthracenyl. When the C 6-40 When the aryl group is substituted, it may be monosubstituted or polysubstituted. Also, there is no limitation on the substitution position, for example, it may be substituted at the ortho position, para position or meta position. DETAILED DESCRIPTION

[0109] The technical scheme of the present invention will be further described in detail below in conjunction with specific embodiments. It should be understood that the following embodiments are only exemplary descriptions and explanations of the present invention and should not be construed as limiting the scope of protection of the present invention. All technologies implemented based on the above content of the present invention are included in the scope that the present invention is intended to protect.

[0110] Unless otherwise specified, the raw materials and reagents used in the following examples are commercially available or can be prepared by known methods.

[0111] Pour point and cloud point test methods:

[0112] Pour point test: The test is carried out in accordance with the standard method of GB / T 3535-2006. In the pour point tester, the block polyether sample is cooled at a specified rate and the fluidity is checked every 3°C. The lowest temperature at which the sample is observed to flow is recorded as the pour point.

[0113] Cloud point test: Dissolve 1% block polyether sample in 5% NaCl aqueous solution, heat until the liquid is completely opaque, cool and stir continuously, and observe the temperature when the opacity disappears as the cloud point.

[0114] Example 1

[0115] (1) 74 g (1 mol) of butanol and 6.0 g of solid potassium hydroxide were added to a reaction kettle, the atmosphere was replaced with nitrogen, the temperature was raised to 120° C., 2904 g of a blend of propylene oxide (2610 g, 45 mol) and cyclohexene oxide (294 g, 3 mol) was continuously introduced at 0.2 MPa, and the reaction was continued until the pressure no longer decreased to prepare a lipophilic segment polymer;

[0116] (2) 15.2 g of potassium methoxide was added to the lipophilic segment polymer prepared above, and 2665 g of a mixture of ethylene oxide (2420 g, 55 mol) and cyclohexene oxide (245 g, 2.5 mol) was continuously introduced at 120° C. and 0.4 MPa, and the reaction was continued until the pressure no longer decreased. Then, ethylene oxide (440 g, 10 mol) was continued to be introduced, and the reaction was continued until the pressure no longer decreased. Acetic acid was added to adjust the pH value to between 6 and 7 to obtain a butanol block polyether.

[0117] The butanol block polyether has a structure as shown in Formula I, where m=1:

[0118]

[0119] Among them, R1 is -C4H9, R2 is a random copolymerization segment of propylene oxide and cyclohexene oxide, R3 is a random copolymerization segment of ethylene oxide and cyclohexene oxide, and R4 is an ethylene oxide polymerization segment.

[0120] A possible structure of butanol block polyether is:

[0121]

[0122] The pour point of the polyether was tested to be 5.5°C and the cloud point was 61.5°C (1% sample was dissolved in 5% NaCl aqueous solution for testing).

[0123] Example 2

[0124] (1) Add 130 g (1 mol) of isooctyl alcohol and 4.3 g of solid potassium hydroxide into a reaction kettle, replace with nitrogen, heat to 120° C., continuously introduce propylene oxide (1740 g, 30 mol) at 0.2 MPa, react until the pressure no longer decreases, introduce butylene oxide (288 g, 4 mol), react until the pressure no longer decreases, and prepare a lipophilic segment polymer;

[0125] (2) 11.6 g of potassium methoxide was added to the lipophilic segment polymer prepared above, and ethylene oxide (660 g, 15 mol) was continuously introduced at 120° C. and 0.4 MPa to react until the pressure no longer decreased, and butylene oxide (144 g, 2 mol) was added to react until the pressure no longer decreased, and then ethylene oxide (660 g, 15 mol) was introduced to react until the pressure no longer decreased, and butylene oxide (144 g, 2 mol) was added to react until the pressure no longer decreased, and then ethylene oxide (880 g, 20 mol) was introduced to react until the pressure no longer decreased, and acetic acid was added to adjust the pH value to between 6 and 7 to obtain isooctyl alcohol block polyether.

[0126] The isooctyl alcohol block polyether has a structure as shown in Formula I, where m=1:

[0127]

[0128] Where R1 is -C8H 17 , R2 is a block polymer segment of a propylene oxide polymer segment and a butylene oxide polymer segment, R3 is a block polymer segment of an ethylene oxide polymer segment and a butylene oxide polymer segment, and R4 is an ethylene oxide polymer segment.

[0129] A possible structure of isooctyl alcohol block polyether is:

[0130]

[0131] The pour point of the polyether was tested to be 13°C and the cloud point was 67.4°C (1% sample was dissolved in 5% NaCl aqueous solution for testing).

[0132] Example 3

[0133] (1) 74 g (1 mol) of butanol and 6.3 g of solid potassium hydroxide were added to a reaction kettle, the atmosphere was replaced with nitrogen, the temperature was raised to 120° C., 3096 g of a blend of propylene oxide (2900 g, 50 mol) and cyclohexene oxide (196 g, 2 mol) was continuously introduced at 0.2 MPa, and the reaction was continued until the pressure no longer decreased, thereby preparing a lipophilic segment polymer;

[0134] (2) 15.7 g of potassium methoxide was added to the lipophilic segment polymer prepared above, and ethylene oxide (968 g, 22 mol) was continuously introduced at 120° C. and 0.4 MPa to react until the pressure no longer decreased, and butylene oxide (144 g, 2 mol) was added to react until the pressure no longer decreased, and then ethylene oxide (968 g, 22 mol) was introduced to react until the pressure no longer decreased, and butylene oxide (144 g, 2 mol) was added to react until the pressure no longer decreased, and then ethylene oxide (880 g, 20 mol) was introduced to react until the pressure no longer decreased, and acetic acid was added to adjust the pH value to between 6 and 7 to obtain a butanol block polyether.

[0135] The butanol block polyether has a structure as shown in Formula I, where m=1:

[0136]

[0137] Among them, R1 is -C4H9, R2 is a random copolymer segment of propylene oxide and cyclohexene oxide, R3 is a block copolymer segment of ethylene oxide polymer segment and butylene oxide polymer segment, and R4 is an ethylene oxide polymer segment.

[0138] A possible structure of butanol block polyether is:

[0139]

[0140] The pour point of the polyether was tested to be 11.0°C and the cloud point was 60.2°C (1% sample was dissolved in 5% NaCl aqueous solution for testing).

[0141] Example 4

[0142] (1) Add 130 g (1 mol) of isooctyl alcohol and 4.7 g of solid potassium hydroxide to a reaction kettle, replace with nitrogen, heat to 120° C., continuously introduce propylene oxide (1320 g, 30 mol) at 0.2 MPa, react until the pressure no longer decreases, add butylene oxide (504 g, 7 mol) and react until the pressure no longer decreases, to prepare a lipophilic segment polymer;

[0143] (2) 12.5 g of potassium methoxide was added to the lipophilic segment polymer prepared above, and 1956 g of a blend of ethylene oxide (1760 g, 40 mol) and cyclohexene oxide (196 g, 2 mol) was continuously introduced at 120° C. and 0.4 MPa to react until the pressure no longer decreased, and then ethylene oxide (660 g, 15 mol) was introduced to react until the pressure no longer decreased, and acetic acid was added to adjust the pH value to between 6 and 7 to obtain isooctyl alcohol block polyether.

[0144] The isooctyl alcohol block polyether has a structure as shown in Formula I, where m=1:

[0145]

[0146] Where R1 is -C8H 17 , R2 is a block polymer segment of propylene oxide polymer segment and butylene oxide polymer segment, R3 is a random polymer segment of ethylene oxide and cyclohexene oxide, and R4 is an ethylene oxide polymer segment.

[0147] A possible structure of isooctyl alcohol block polyether is:

[0148]

[0149] The pour point of the polyether was tested to be 9.5°C and the cloud point was 65.2°C (1% sample was dissolved in 5% NaCl aqueous solution for testing).

[0150] Example 5

[0151] (1) Add 76 g (1 mol) of propylene glycol and 8.4 g of solid potassium hydroxide into a reaction kettle, replace with nitrogen, heat to 120° C., and continuously introduce 4220 g of a blend of propylene oxide (3828 g, 66 mol) and cyclohexene oxide (392 g, 4 mol) at 0.2 MPa, and react until the pressure no longer decreases to prepare a lipophilic segment polymer;

[0152] (2) 23.4 g of potassium methoxide was added to the lipophilic segment polymer prepared above, and ethylene oxide (1760 g, 40 mol) was continuously introduced at 120° C. and 0.4 MPa to react until the pressure no longer decreased, butylene oxide (144 g, 2 mol) was introduced to react until the pressure no longer decreased, then ethylene oxide (1760 g, 40 mol) was introduced to react until the pressure no longer decreased, butylene oxide (144 g, 2 mol) was introduced to react until the pressure no longer decreased, ethylene oxide (2640 g, 30 mol) was introduced to react until the pressure no longer decreased, and acetic acid was added to adjust the pH value to between 6 and 7 to obtain a propylene glycol block polyether.

[0153] The propylene glycol block polyether has a structure as shown in Formula I, where m=2:

[0154]

[0155] Among them, R1 is -CH2CH2CH2-, R2 is a random copolymer segment of propylene oxide and cyclohexene oxide, R3 is a block copolymer segment of ethylene oxide polymer segment and butylene oxide polymer segment, and R4 is an ethylene oxide polymer segment.

[0156] A possible structure of propylene glycol block polyether is:

[0157]

[0158] The pour point of the polyether was tested to be 9.0°C and the cloud point was 64.4°C (1% sample was dissolved in 5% NaCl aqueous solution for testing).

[0159] Example 6

[0160] (1) Add 92 g (1 mol) of glycerol and 10.572 g of solid potassium hydroxide into a reaction kettle, replace with nitrogen, heat to 120° C., and continuously introduce 5286 g of a blend of propylene oxide (4698 g, 81 mol) and cyclohexene oxide (588 g, 6 mol) at 0.2 MPa, and react until the pressure no longer decreases to prepare a lipophilic segment polymer;

[0161] (2) 32.1 g of potassium methoxide was added to the lipophilic segment polymer prepared above, and a blend of ethylene oxide (5280 g, 120 mol) and cyclohexene oxide (294 g, 3 mol) was continuously introduced at 120° C. and 0.4 MPa to react until the pressure no longer decreased. Ethylene oxide (1980 g, 45 mol) was introduced to react until the pressure no longer decreased, and acetic acid was added to adjust the pH value to between 6 and 7 to obtain a glycerol block polyether.

[0162] The glycerol block polyether has a structure as shown in Formula I, where m=3:

[0163]

[0164] Among them, R1 is R2 is a random copolymer segment of propylene oxide and cyclohexene oxide, R3 is a random copolymer segment of ethylene oxide and cyclohexene oxide, and R4 is an ethylene oxide polymer segment.

[0165] A possible structure of glycerol block polyether is:

[0166]

[0167] The pour point of the polyether was tested to be 7.0°C and the cloud point was 63.8°C (1% sample was dissolved in 5% NaCl aqueous solution for testing).

[0168] Example 7

[0169] (1) Add 407 g (1 mol) of tristyrylphenol and 5.8 g of solid potassium hydroxide into a reaction kettle, replace with nitrogen, heat to 120° C., and continuously introduce 2516 g of a blend of propylene oxide (2320 g, 40 mol) and cyclohexene oxide (196 g, 2 mol) at 0.2 MPa, and react until the pressure no longer decreases to prepare a lipophilic segment polymer;

[0170] (2) 12.0 g of potassium methoxide was added to the lipophilic segment polymer prepared above, and a mixture of 2420 g of ethylene oxide (55 mol) and 2714 g of cyclohexene oxide (196 g, 2 mol) was continuously introduced at 120° C. and 0.4 MPa, and the reaction was continued until the pressure no longer decreased. Then, ethylene oxide (440 g, 10 mol) was continued to be introduced, and the reaction was continued until the pressure no longer decreased. Acetic acid was added to adjust the pH value to between 6 and 7 to obtain tristyrylphenol block polyether.

[0171] The triphenylethylene block polyether has a structure as shown in Formula I, where m=1:

[0172]

[0173] Among them, R1 is R2 is a random copolymer segment of propylene oxide and cyclohexene oxide, R3 is a random copolymer segment of ethylene oxide and cyclohexene oxide, and R4 is an ethylene oxide polymer segment.

[0174] One possible structure of tristyrylphenol block polyether is:

[0175]

[0176] The pour point of the polyether was tested to be 10°C and the cloud point was 66.0°C (1% sample was dissolved in 5% NaCl aqueous solution for testing).

[0177] Example 8 emulsifiable concentrate

[0178] The block polyether product obtained in Example 2 was used and recorded as block polyether A.

[0179] The formula for preparing 25wt% pyraclostrobin emulsifiable concentrate is:

[0180]

[0181]

[0182] The above components are mixed at room temperature to obtain 25 wt% pyraclostrobin emulsifiable concentrate.

[0183] The emulsifiable concentrate product was diluted with 200 times standard hard water at 30°C and left for 1 hour. There was no floating oil on the surface and no precipitation on the bottom, and the emulsification performance was qualified.

[0184] Example 9 Suspension

[0185] The block polyether product obtained in Example 3 was used and recorded as block polyether B.

[0186] Formula for preparing 40wt% difenoconazole suspension:

[0187]

[0188] The above components are mixed at room temperature to obtain a 40 wt% difenoconazole suspension.

[0189] The suspension concentrate product is diluted with 200 times standard hard water at 30°C and left for 1 hour, and the suspension rate is 98%, and the dilution stability is qualified.

[0190] The above is an explanation of the embodiments of the present invention. However, the present invention is not limited to the above embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A block polyether, characterized in that: The block polyether has a structure as shown in Formula I: Wherein, m is an integer from 1 to 4; R1 represents C 1-8 Alkyl, C 1-8 Alkylene, alkyl substituted C 6-20 Aryl, The R2 segment is composed of structural unit A and structural unit D, and the structural unit D is obtained by polymerization of cyclohexene oxide; 20≤a1≤60, a4 is selected from any number in the continuous range of 1-10; The R3 segment is composed of structural units A' and C': 20≤b1≤60,0<b3≤20; R4 represents an oxyethylene ethylene oxide polymer segment, that is, 0 <c1≤40。 2. A block polyether, characterized in that The block polyether has a structure as shown in Formula I: Wherein, m is 1; R1 stands for The R2 segment is composed of structural unit A and structural unit D, and the structural unit D is obtained by polymerization of cyclohexene oxide; 20≤a1≤60, a4 is selected from any number in the continuous range of 1-10; The R3 segment is composed of structural units A' and C': 20≤b1≤60,0<b3≤20; R4 represents an oxyethylene ethylene oxide polymer segment, that is, 0 <c1≤40。 3. A block polyether, characterized in that: The block polyether has a structure as shown in Formula I: Wherein, m is an integer from 1 to 4; R1 represents C 1-8 Alkyl, C 1-8 Alkylene, alkyl substituted C 6-20 Aryl, The R2 segment is composed of structural units A and B: 20≤a1≤60,0<a2≤20; The R3 segment is composed of structural unit A' and structural unit E', and the structural unit E' is obtained by polymerization of cyclohexene oxide; 20≤b1≤60, b5 is selected from any number in the continuous range of 1-10; R4 represents an oxyethylene ethylene oxide polymer segment, that is, 0 <c1≤40。 4. A block polyether, characterized in that The block polyether has a structure as shown in Formula I: Wherein, m is 1; R1 stands for The R2 segment is composed of structural units A and B: 20≤a1≤60,0<a2≤20; The R3 segment is composed of structural unit A' and structural unit E', and the structural unit E' is obtained by polymerization of cyclohexene oxide; 20≤b1≤60, b5 is selected from any number in the continuous range of 1-10; R4 represents an oxyethylene ethylene oxide polymer segment, that is, 0 <c1≤40。 5. A block polyether, characterized in that The block polyether has a structure as shown in Formula I: Wherein, m is an integer from 1 to 4; R1 represents C 1-8 Alkyl, C 1-8 Alkylene, alkyl substituted C 6-20 Aryl, The R2 segment is composed of structural units A and D: 20≤a1≤60, a4 is selected from any number in the continuous range of 1-10; The R3 segment is composed of structural units A' and E': 20≤b1≤60, b5 is selected from any number in the continuous range of 1-10; The structural unit D and the structural unit E' are both obtained by polymerization of cyclohexene oxide; R4 represents an oxyethylene ethylene oxide polymer segment, that is, 0 <c1≤40。 6. A block polyether, characterized in that The block polyether has a structure as shown in Formula I: Wherein, m is 1; R1 stands for The R2 segment is composed of structural units A and D: 20≤a1≤60, a4 is selected from any number in the continuous range of 1-10; The R3 segment is composed of structural units A' and E': 20≤b1≤60, b5 is selected from any number in the continuous range of 1-10; The structural unit D and the structural unit E' are both obtained by polymerization of cyclohexene oxide; R4 represents an oxyethylene ethylene oxide polymer segment, that is, 0 <c1≤40。 7. The block polyether according to claim 1, 3 or 5, characterized in that R1 is CH3-, CH3CH2-, CH3CH2CH2-, CH3CH2CH2CH2-, -CH2CH2-, -CH2CH2CH2-, -(CH2)5CH(CH3)2.

8. The block polyether according to claim 1, 2, 5 or 6, characterized in that The structural units A and D are arranged randomly or in blocks.

9. The block polyether according to claim 3 or 4, characterized in that The structural units A and B are arranged randomly or in blocks.

10. The block polyether according to claim 1 or 2, characterized in that The structural units A' and C' are arranged randomly or in blocks.

11. The block polyether according to any one of claims 3 to 6, characterized in that: The structural units A' and E' are arranged randomly or in blocks.

12. The block polyether according to any one of claims 1 to 6, characterized in that The structural unit A' is obtained by polymerization of ethylene oxide; The structural unit A is obtained by polymerization of propylene oxide.

13. The block polyether according to claim 3 or 4, characterized in that The structural unit B is obtained by polymerization of butylene oxide.

14. The block polyether according to claim 1 or 2, characterized in that The structural unit C' is obtained by polymerization of butylene oxide.

15. The block polyether according to claim 1, 2, 5 or 6, characterized in that 2≤a4≤7.5。 16. The block polyether according to claim 3 or 4, characterized in that 2≤a2≤15。 17. The block polyether according to claim 1 or 2, characterized in that 2≤b3≤15。 18. The block polyether according to any one of claims 3 to 6, characterized in that: 2≤b5≤10。 19. The block polyether according to any one of claims 1 to 6, characterized in that 5≤c1≤30。 20. The block polyether according to claim 1, characterized in that The block polyether has a structure shown in the following formula 3 or formula 5:

21. The block polyether according to claim 3, characterized in that The block polyether has a structure shown in the following formula 4:

22. The block polyether according to claim 5, characterized in that The block polyether has a structure shown in the following formula 1 or formula 6:

23. The block polyether according to claim 6, characterized in that The block polyether has a structure shown in the following formula 7:

24. The block polyether according to any one of claims 1 to 6, characterized in that The pour point of the block polyether is lower than 11° C., the cloud point of the block polyether is 57-70° C., and the test medium for the cloud point is a 5% sodium chloride aqueous solution.

25. The block polyether according to claim 17, characterized in that The pour point of the block polyether is 0-11°C, and the cloud point of the block polyether is 60-68°C.

26. The method for preparing the block polyether according to claim 1, characterized in that: The preparation method comprises the following steps: (1) Synthesis of lipophilic segment polyether: In the presence of catalyst A, the initiator and the first olefin oxide undergo polymerization reaction to obtain the lipophilic segment polyether; The first olefin oxide consists of propylene oxide and cyclohexene oxide; The initiator is selected from one, two or more of a monohydric alcohol, a dihydric alcohol, a trihydric alcohol and a tetrahydric alcohol containing R1; (2) Synthesis of hydrophilic segment polyether: In the presence of catalyst B, the lipophilic segment polyether is polymerized with the second oxidized olefin to obtain a hydrophilic segment polyether; the hydrophilic segment polyether is capped with ethylene oxide, and acid is added for neutralization to obtain the block polyether; The second alkylene oxide consists of ethylene oxide and butylene oxide.

27. The method for preparing the block polyether according to claim 2, characterized in that: The preparation method comprises the following steps: (1) Synthesis of lipophilic segment polyether: In the presence of catalyst A, the initiator and the first olefin oxide undergo polymerization reaction to obtain the lipophilic segment polyether; The first olefin oxide consists of propylene oxide and cyclohexene oxide; The initiator contains Monohydric alcohol; (2) Synthesis of hydrophilic segment polyether: In the presence of catalyst B, the lipophilic segment polyether is polymerized with the second oxidized olefin to obtain a hydrophilic segment polyether; the hydrophilic segment polyether is capped with ethylene oxide, and acid is added for neutralization to obtain the block polyether; The second alkylene oxide consists of ethylene oxide and butylene oxide.

28. The method for preparing the block polyether according to claim 3, characterized in that: The preparation method comprises the following steps: (1) Synthesis of lipophilic segment polyether: In the presence of catalyst A, the initiator and the first olefin oxide undergo polymerization reaction to obtain the lipophilic segment polyether; The first olefin oxide consists of propylene oxide and butylene oxide; The initiator is selected from one, two or more of a monohydric alcohol, a dihydric alcohol, a trihydric alcohol and a tetrahydric alcohol containing R1; (2) Synthesis of hydrophilic segment polyether: In the presence of catalyst B, the lipophilic segment polyether is polymerized with the second oxidized olefin to obtain a hydrophilic segment polyether; the hydrophilic segment polyether is capped with ethylene oxide, and acid is added for neutralization to obtain the block polyether; The second alkylene oxide consists of ethylene oxide and cyclohexyl oxide.

29. The method for preparing the block polyether according to claim 4, characterized in that: The preparation method comprises the following steps: (1) Synthesis of lipophilic segment polyether: In the presence of catalyst A, the initiator and the first olefin oxide undergo polymerization reaction to obtain the lipophilic segment polyether; The first olefin oxide consists of propylene oxide and butylene oxide; The initiator contains Monohydric alcohol; (2) Synthesis of hydrophilic segment polyether: In the presence of catalyst B, the lipophilic segment polyether is polymerized with the second oxidized olefin to obtain a hydrophilic segment polyether; the hydrophilic segment polyether is capped with ethylene oxide, and acid is added for neutralization to obtain the block polyether; The second alkylene oxide consists of ethylene oxide and cyclohexyl oxide.

30. The method for preparing the block polyether according to claim 5, characterized in that: The preparation method comprises the following steps: (1) Synthesis of lipophilic segment polyether: In the presence of catalyst A, the initiator and the first olefin oxide undergo polymerization reaction to obtain the lipophilic segment polyether; The first olefin oxide consists of propylene oxide and cyclohexene oxide; The initiator is selected from one, two or more of a monohydric alcohol, a dihydric alcohol, a trihydric alcohol and a tetrahydric alcohol containing R1; (2) Synthesis of hydrophilic segment polyether: In the presence of catalyst B, the lipophilic segment polyether is polymerized with the second oxidized olefin to obtain a hydrophilic segment polyether; the hydrophilic segment polyether is capped with ethylene oxide, and acid is added for neutralization to obtain the block polyether; The second alkylene oxide consists of ethylene oxide and cyclohexyl oxide.

31. The method for preparing the block polyether according to claim 6, characterized in that: The preparation method comprises the following steps: (1) Synthesis of lipophilic segment polyether: In the presence of catalyst A, the initiator and the first olefin oxide undergo polymerization reaction to obtain the lipophilic segment polyether; The first olefin oxide consists of propylene oxide and cyclohexene oxide; The initiator contains Monohydric alcohol; (2) Synthesis of hydrophilic segment polyether: In the presence of catalyst B, the lipophilic segment polyether is polymerized with the second oxidized olefin to obtain a hydrophilic segment polyether; the hydrophilic segment polyether is capped with ethylene oxide, and acid is added for neutralization to obtain the block polyether; The second alkylene oxide consists of ethylene oxide and cyclohexyl oxide.

32. The preparation method according to any one of claims 26 to 31, characterized in that: The catalyst A and the catalyst B are both alkaline catalysts.

33. The preparation method according to claim 26, 28 or 30, characterized in that: The monohydric alcohol is selected from one, two or more of methanol, ethanol, propanol, butanol, isooctyl alcohol, p-cresol and styrenated phenol; the dihydric alcohol is selected from one or two of ethylene glycol and propylene glycol; the trihydric alcohol is selected from glycerol; and the tetrahydric alcohol is pentaerythritol.

34. The preparation method according to any one of claims 26 to 31, characterized in that: In step (2), the acid is selected from one, two or more of acetic acid, lactic acid and citric acid; and / or, neutralized to a neutral pH, wherein the neutral pH refers to a pH of 6-7.

35. Use of the block polyether according to any one of claims 1 to 25 in a pesticide formulation product, wherein the pesticide formulation product is an emulsifiable concentrate, an emulsion in water, a microemulsion, a wettable powder, a water-dispersible granule or a suspension concentrate.

36. An emulsifiable concentrate, characterized in that The emulsifiable concentrate contains the block polyether according to any one of claims 1 to 25.

37. A suspension concentrate, characterized in that The suspending agent contains the block polyether according to any one of claims 1 to 25.

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