CN113912851B - Polyether modified organosilicon polymer and preparation method and application thereof - Google Patents
Polyether modified organosilicon polymer and preparation method and application thereof Download PDFInfo
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- CN113912851B CN113912851B CN202111280918.2A CN202111280918A CN113912851B CN 113912851 B CN113912851 B CN 113912851B CN 202111280918 A CN202111280918 A CN 202111280918A CN 113912851 B CN113912851 B CN 113912851B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/42—Block-or graft-polymers containing polysiloxane sequences
- C08G77/46—Block-or graft-polymers containing polysiloxane sequences containing polyether sequences
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/32—Polymers modified by chemical after-treatment
- C08G65/329—Polymers modified by chemical after-treatment with organic compounds
- C08G65/336—Polymers modified by chemical after-treatment with organic compounds containing silicon
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J171/00—Adhesives based on polyethers obtained by reactions forming an ether link in the main chain; Adhesives based on derivatives of such polymers
- C09J171/02—Polyalkylene oxides
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J183/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers
- C09J183/10—Block or graft copolymers containing polysiloxane sequences
- C09J183/12—Block or graft copolymers containing polysiloxane sequences containing polyether sequences
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Abstract
The invention provides a polyether modified organosilicon polymer, a preparation method and application thereof. The preparation method of the polyether modified organosilicon polymer comprises the following steps: s1, preparing macromolecular double-end allyl-terminated polypropylene glycol ether by hydrosilation chain extension reaction of double-end allyl-terminated polypropylene glycol and double-end hydrosilane compound under the action of a first Pt catalyst; s2, carrying out hydrosilation reaction on the macromolecular double-end allyl-terminated polypropylene glycol ether obtained in the S1 and trimethoxy hydrogen-containing silane under the action of a second Pt catalyst to prepare the polyether modified organosilicon polymer. The polyether modified organosilicon polymer provided by the invention is prepared by adopting two steps of hydrosilation reactions in a specific sequence, and has the advantages of mild condition, high yield, no byproduct, economy and environmental protection.
Description
Technical Field
The invention relates to the technical field of synthesis of sealants, in particular to a polyether modified organosilicon polymer and a preparation method and application thereof.
Background
The silane modified polyether sealant is prepared by taking polyether polyol as a raw material, the molecular weight of the polyether polyol in the domestic market is 400-4000, and only a few enterprises such as the Japan and the like can directly prepare polyether with the molecular weight of more than 18000, so that the polyether with large molecular weight usually needs to be chain-extended by using the polyether polyol with low molecular weight to meet the requirements of the polyether adhesive on the performances such as the molecular weight, the strength and the like of the base adhesive in application. The common chain extender is methylene dichloride, after forming-O-M by alkali metal alkoxide or sodium hydroxide/potassium and the like, MCl is removed from the chain extender and the methylene dichloride to achieve the chain extending effect. The chain extender in other researches is small molecular alcohol containing binary or multi-hydroxyl, amino group-containing, imino group-containing or ether alcohol, and the chain extender is small molecular compound which is easy to clear from a system, but has more byproducts during chain extension, and has poor short chain temperature resistance, only plays a chain extension effect, but can not improve the heat resistance of polyether.
Disclosure of Invention
In order to solve the defects of the prior art, a polyether modified organosilicon polymer and a preparation method thereof are provided, and the sealant prepared from the polyether modified organosilicon polymer obtained by the preparation method has higher heat resistance.
The preparation method of the polyether modified organosilicon polymer provided by the invention comprises the following steps:
s1, preparing macromolecular double-end allyl-terminated polypropylene glycol ether by hydrosilation chain extension reaction of double-end allyl-terminated polypropylene glycol and double-end hydrosilane compound under the action of a first Pt catalyst;
s2, carrying out hydrosilation reaction on the macromolecular double-end allyl-terminated polypropylene glycol ether obtained in the S1 and trimethoxy hydrogen-containing silane under the action of a second Pt catalyst to prepare the polyether modified organosilicon polymer.
In a preferred embodiment of the present invention, in step S1, the molecular weight of the polypropylene glycol in the double-ended allyl-terminated polypropylene glycol is 400 to 4000, specifically 400, 800, 1000, 2000 or 4000, and more preferably 400. The double-end allyl end capped polypropylene glycol in the invention is an addition product of polypropylene glycol and chloropropene after alkoxide reaction, when the molecular weight of the selected polypropylene glycol is 400-4000, the molecular weight of the double-end allyl end capped polypropylene glycol obtained through the steps is 480-4080.
In a preferred embodiment of the present invention, in step S1, the double-ended hydrogen-containing silane compound is a hydrogen-containing double-ended or terminal hydrogen-containing silicone oil, preferably a terminal hydrogen-containing silicone oil, more preferably a terminal hydrogen-containing silicone oil having a hydrogen content of 0.06 to 0.19wt%, still more preferably a terminal hydrogen-containing silicone oil having a hydrogen content of 0.11 to 0.13 wt%.
In a preferred embodiment of the present invention, in step S1, the molar ratio of the double-ended allyl-terminated polypropylene glycol to the double-ended hydrosilane compound is (1.8 to 2.2): 1, preferably (1.95 to 2.05): 1.
among them, the amount of the first Pt catalyst is preferably such that the amount of Pt in the reaction system (step S1 reaction system) is 5 to 100ppm, more preferably 10 to 30ppm, of the reaction raw material. In a preferred embodiment of the present invention, in step S1, the first Pt catalyst is triphenylphosphine platinum. More preferably, the molar ratio of platinum to triphenylphosphine is preferably 2:1.
in a preferred embodiment of the invention, in step S1, a first auxiliary agent (i.e. auxiliary agent a) is also included, which is butanone, acetaldehyde, acetylacetone or boron trifluoride etherate, preferably boron trifluoride etherate. In step S1, the molar ratio of the first auxiliary agent to Pt in the reaction system is (1-5): 1, preferably (1.2-2): 1.
In a preferred embodiment of the present invention, the specific steps of step S1 include:
the double-end hydrogen-containing silane compound, the first catalyst and the first auxiliary agent are activated for 0.5 to 4 hours at the temperature of between 20 ℃ below zero and 50 ℃, the double-end allyl-terminated polypropylene glycol is dripped, and the heat preservation reaction is carried out for 1 to 8 hours at the temperature of between 20 and 80 ℃. Cooling after the reaction is finished, distilling to remove low boiling point substances to obtain macromolecular double-end allyl end-capped polypropylene glycol ether, namely A-PPG- [ Si (CH) 3 ) 2 O]Ext> -ext> PPGext> -ext> aext>.ext> In step S1, the activation temperature is preferably 0 to 30℃and the activation time is preferably 1 to 2 hours. The reaction temperature is preferably 50-70 ℃, and the reaction time is preferably 3-5 h.
In a preferred embodiment of the present invention, the specific steps of step S2 include:
and (2) activating the macromolecular double-end allyl-terminated polypropylene glycol ether obtained in the step (S1), a second Pt catalyst and a second auxiliary agent for 0.5-4 h at the temperature of 30-80 ℃, dropwise adding trimethoxy hydrogen-containing silane, preserving heat for 1-8 h at the temperature of 60-80 ℃, and removing impurities to obtain the polyether modified organosilicon polymer.
Among them, the second Pt catalyst is preferably a saturated alcohol solution of chloroplatinic acid, and more preferably a Speier catalyst. The second auxiliary (i.e. auxiliary B) is preferably acetic acid, oxalic acid, citric acid or phosphoric acid, preferably acetic acid. The second auxiliary is used in an amount such that the pH of the system of step S2 is preferably from 2 to 5. Wherein, the activation temperature in the step S2 is preferably 40-60 ℃, and the activation time is preferably 1-2 h. The heat preservation time is preferably 3 to 5 hours. In a preferred embodiment of the present invention, in step S2, the molar ratio of trimethoxysilane to the double end allyl terminated polypropylene glycol (i.e., the double end allyl terminated polypropylene glycol in step S1) is 1 (0.35 to 0.6), preferably 1 (0.38 to 0.45). The amount of the second Pt catalyst is such that the amount of Pt in the reaction system (reaction system of step S2) is preferably 5 to 100ppm, more preferably 10 to 30ppm, of the reaction raw material.
The polyether modified organosilicon polymer obtained by the invention has good heat resistance and tensile property.
It is another object of the present invention to provide polyether modified silicone polymers obtained by the above preparation process.
It is still another object of the present invention to provide the use of the above-mentioned preparation method or the polyether-modified silicone polymer obtained by the above-mentioned preparation method in the preparation of sealants.
The beneficial effects of the invention are as follows:
(1) According to the invention, the hydrogen-containing double-end socket or short-chain end hydrogen-containing silicone oil is innovatively used as a chain extender, and a specific flexible Si-O-Si chain segment is introduced into a polyether molecular chain, so that the heat resistance and the tensile property of polyether can be effectively improved.
(2) The polyether modified organosilicon polymer provided by the invention is prepared by adopting two steps of hydrosilation reactions in a specific sequence, and has the advantages of mild condition, high yield, no byproduct, economy and environmental protection.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
The terminal hydrogen-containing silicone oil used in the examples of the present invention was purchased from Ningbo Ruo Hirudo New Material technologies Co.Ltd.
Example 1
The embodiment of the invention provides a preparation method and application of a polyether modified organosilicon polymer, comprising the following steps:
1)A-PPG-[Si(CH 3 ) 2 O]ext> Synthesisext> ofext> PPGext> -ext> Aext>
Under the protection of nitrogen, 10g of hydrogen-containing double seal head, a first Pt catalyst (the dosage of the first Pt catalyst is 20ppm of the total amount of reaction raw materials in the step 1) and an auxiliary agent A boron trifluoride diethyl ether (the molar ratio of boron trifluoride diethyl ether to Pt in the first Pt catalyst is 1.5:1) are activated for 1.5h at 20 ℃, 73.5g of double-end allyl-terminated polypropylene glycol is dropwise added, after 30min of addition, the reaction is carried out for 3h at about 70 ℃, the temperature is reduced, excessive hydrogen-containing double seal head and other impurities are removed, and the A-PPG- [ Si (CH) is obtained 3 ) 2 O]Ext> -ext> PPGext> -ext> aext>,ext> iodineext> valueext> testedext> 47.3ext>.ext>
Wherein the first Pt catalyst is triphenylphosphine platinum, and the mole ratio of platinum to triphenylphosphine is 2:1. the preparation method of triphenylphosphine platinum in the embodiment of the invention comprises the following steps: 0.5g of chloroplatinic acid is dissolved in 10ml of isopropanol, and 0.13g triphenylphosphine is added for reaction at 50-60 ℃ for 2h, thus obtaining the catalyst.
2) Synthesis of polyether modified organosilicon polymer
Under the protection of nitrogen, the A-PPG- [ Si (CH) obtained in the step 1) is treated 3 ) 2 O]Ext> theext> PPGext> -ext> Aext> andext> theext> secondext> Ptext> catalystext> chloroplatinicext> acidext> isopropanolext> solutionext> (ext> theext> dosageext> ofext> theext> chloroplatinicext> acidext> isopropanolext> solutionext> isext> suchext> thatext> theext> dosageext> ofext> Ptext> inext> theext> reactionext> systemext> ofext> theext> stepext> 2ext>)ext> isext> 30ext> ppmext> ofext> theext> totalext> amountext> ofext> theext> reactionext> rawext> materialsext> ofext> theext> stepext> 2ext>)ext>,ext> theext> auxiliaryext> Bext> aceticext> acidext> (ext> theext> dosageext> ofext> aceticext> acidext> isext> usedext> forext> adjustingext> theext> pHext> valueext> ofext> theext> reactionext> systemext> ofext> theext> stepext> 2ext>)ext> toext> beext> 4.52ext>)ext> areext> activatedext> forext> 1ext> hext> atext> 40ext> ℃ext>,ext> 45.6ext> gext> trimethoxyext> hydrogenext> -ext> containingext> silaneext> isext> dropwiseext> addedext>,ext> theext> temperatureext> isext> keptext> forext> 3ext> hext> afterext> theext> reactionext> isext> carriedext> outext> untilext> theext> temperatureext> isext> 60ext> ℃ext>,ext> theext> iodineext> valueext> isext> 2.8ext> forext> internalext> standardext> testext>,ext> theext> temperatureext> isext> reducedext>,ext> andext> theext> unreactedext> trimethoxyext> hydrogenext> -ext> containingext> silaneext> andext> theext> byproductext> tetramethoxyext> silaneext> areext> distilledext> andext> recoveredext> toext> obtainext> 86.76ext> gext> polyetherext> modifiedext> organosiliconext> polymerext>.ext>
Example 2
The method provided in this example is the same as that of example 1, except that the double-ended hydrogen-containing silane compound in the present invention is a terminal hydrogen-containing silicone oil having a hydrogen content of 0.17 to 0.19%.
Example 3
The method provided in this example is the same as that of example 1, except that the double-ended hydrogen-containing silane compound in the present invention is a terminal hydrogen-containing silicone oil having a hydrogen content of 0.11 to 0.13%.
Example 4
The method provided in this example is the same as that of example 1, except that the double-ended hydrogen-containing silane compound in the present invention is a terminal hydrogen-containing silicone oil having a hydrogen content of 0.1 to 0.12%.
Example 5
The method provided in this example is the same as that in example 1, except that the double-ended hydrogen-containing silane compound in the present invention is a terminal hydrogen-containing silicone oil having a hydrogen content of 0.06 to 0.08%.
Example 6
The embodiment of the invention provides a preparation method and application of a polyether modified organosilicon polymer, comprising the following steps:
1)A-PPG-[Si(CH 3 ) 2 O]ext> Synthesisext> ofext> PPGext> -ext> Aext>
Under the protection of nitrogen, 10g of terminal hydrogen-containing silicone oil with hydrogen content of 0.11-0.13%, a first Pt catalyst (the dosage of the first Pt catalyst is 5ppm of the total amount of the reaction raw materials in the step 1) and an auxiliary agent A butanone (the molar ratio of butanone to Pt in the first Pt catalyst is 1:1) are activated for 4 hours at 0 ℃, 25.58g of double-end allyl-terminated polypropylene glycol (A-PPG 2000-A) is dropwise added, and after 30 minutes, the mixture is reacted at about 20 ℃ for 8 hours in a heat-preserving way to obtain A-PPG- [ Si (CH) 3 ) 2 O]Ext> -ext> PPGext> -ext> aext>,ext> iodineext> numberext> testedext> 10.6ext>.ext>
Wherein the first Pt catalyst is a triphenylphosphine complex of Pt.
2) Synthesis of polyether modified organosilicon polymer
Under the protection of nitrogen, the A-PPG- [ Si (CH) obtained in the step 1) is treated 3 ) 2 O]Ext> PPGext> -ext> Aext> withext> aext> secondext> Ptext> catalystext> chloroplatinicext> acidext> isopropanolext> solutionext> (ext> theext> amountext> ofext> theext> chloroplatinicext> acidext> isopropanolext> solutionext> beingext> suchext> thatext> theext> amountext> ofext> Ptext> inext> theext> reactionext> systemext> ofext> stepext> 2ext>)ext> isext> 10ext> ppmext> basedext> onext> theext> totalext> amountext> ofext> theext> reactionext> materialsext> ofext> stepext> 2ext>)ext>)ext>,ext> oxalicext> acidext> (ext> theext> amountext> ofext> oxalicext> acidext> toext> adjustext> theext> reactionext> ofext> stepext> 2ext>)ext>The pH value of the reaction system is 3.42), activating for 4 hours at 30 ℃, dropwise adding 4.03g of trimethoxy hydrogen-containing silane, heating to 80 ℃ after the addition, preserving heat and reacting for 1 hour until the internal standard test iodine value is 3.2, cooling, distilling and recovering unreacted trimethoxy hydrogen-containing silane and byproduct tetramethoxy silane, thus obtaining 37g of polyether modified organosilicon polymer.
Example 7
The embodiment of the invention provides a preparation method and application of a polyether modified organosilicon polymer, comprising the following steps:
1)A-PPG-[Si(CH 3 ) 2 O]ext> Synthesisext> ofext> PPGext> -ext> Aext>
Under the protection of nitrogen, 10g of terminal hydrogen-containing silicone oil with the hydrogen content of 0.11-0.13 percent, a first Pt catalyst (the dosage of the first Pt catalyst is 100ppm of the total amount of reaction raw materials in the step 1) and an auxiliary agent A butanone (the molar ratio of butanone to Pt in the first Pt catalyst is 5:1) are activated for 0.5h at 50 ℃, 14.26g of double-end allyl-terminated polypropylene glycol (A-PPG 1000-A) is dripped, after 30min, the reaction is carried out for 1h at about 80 ℃ after the addition, the temperature is reduced, and excessive terminal hydrogen-containing silicone oil and other impurities are removed to obtain A-PPG- [ Si (CH) 3 ) 2 O]Ext> -ext> PPGext> -ext> aext>,ext> iodineext> numberext> testedext> 17.3ext>.ext>
Wherein the first Pt catalyst is triphenylphosphine platinum, and the mole ratio of platinum to triphenylphosphine is 2:1.
2) Synthesis of polyether modified organosilicon polymer
Under the protection of nitrogen, the A-PPG- [ Si (CH) obtained in the step 1) is treated 3 ) 2 O]Ext> -ext> PPGext> -ext> Aext> andext> aext> secondext> Ptext> catalystext> chloroplatinicext> acidext> isopropanolext> solutionext> (ext> theext> dosageext> ofext> theext> chloroplatinicext> acidext> isopropanolext> solutionext> isext> suchext> thatext> theext> dosageext> ofext> Ptext> inext> theext> reactionext> systemext> ofext> theext> stepext> 2ext>)ext> isext> 100ext> ppmext> ofext> theext> totalext> amountext> ofext> reactionext> rawext> materialsext> ofext> theext> stepext> 2ext>)ext>,ext> citricext> acidext> (ext> theext> dosageext> ofext> citricext> acidext> isext> usedext> forext> adjustingext> theext> pHext> valueext> ofext> theext> reactionext> systemext> ofext> theext> stepext> 2ext>)ext> toext> 3.18ext>)ext>,ext> activatingext> atext> 80ext> ℃ext> forext> 0.5ext> hext>,ext> dropwiseext> addingext> 2.69ext> gext> trimethoxyext> hydrogenext> -ext> containingext> silaneext>,ext> addingext> theext> trimethoxyext> hydrogenext> -ext> containingext> silaneext>,ext> carryingext> outext> heatext> preservationext> reactionext> atext> 80ext> ℃ext> forext> 8ext> hext> untilext> theext> internalext> standardext> testext> iodineext> valueext> isext> 3.7ext>,ext> coolingext>,ext> distillingext> andext> recoveringext> unreactedext> trimethoxyext> hydrogenext> -ext> containingext> silaneext> andext> byproductext> tetramethoxyext> silaneext> toext> obtainext> 25.3ext> gext> polyetherext> modifiedext> organosiliconext> polymerext>.ext>
Comparative example 1
The invention provides a preparation method and application of a polyether modified organosilicon polymer, which comprises the following steps:
1) 24g of double-end allyl-terminated polypropylene glycol (A-PPG 400-A) and a second Pt catalyst chloroplatinic acid isopropanol solution (the dosage of the chloroplatinic acid isopropanol solution is 30ppm of the total amount of the reaction raw materials in the step 2) in the reaction system), acetic acid is used for adjusting pH to about 4.3, activation is carried out at 40 ℃ for 1h, 6.1g of trimethyl hydrogen silane is dropwise added, the temperature is kept at 60 ℃ for 3h, cooling and unreacted trimethyl hydrogen silane and byproducts are removed by distillation, and the polyether with one end being methoxy-terminated and the other end being allyl-terminated is obtained, and the iodine value is 53.26.
2) 34.16g of terminal hydrogen silicone oil with hydrogen content of 0.11-0.13% and triphenylphosphine platinum as a first Pt catalyst (mole ratio of platinum to triphenylphosphine is 2: 1) (the amount of the first Pt catalyst is 20ppm of the total amount of the reaction raw materials in the step 2) and the auxiliary agent A boron trifluoride diethyl ether (the molar ratio of boron trifluoride diethyl ether to Pt in the first Pt catalyst is 1.5:1) are activated for 1.5h at 20 ℃, the polyether with one end of the methoxy end capped and one end of the allyl end capped obtained in the step 1) is dropwise added, after the addition is completed for 30min, the reaction is carried out at 70 ℃ for 3h at a temperature of about 70 ℃, and 63.23g of polyether modified organosilicon compounds are obtained after impurity removal.
Experimental example
The polyether modified organosilicon polymer provided by the embodiment of the invention is used for respectively preparing the sealant for performance test.
The preparation method of the sealant comprises the following steps: 100 parts by mass of polyether modified organosilicon polymer, 200 parts by mass of active light calcium carbonate, 60 parts by mass of carbon black (the active light calcium carbonate and the carbon black are baked in advance at 120 ℃ for 24 hours), 80 parts by mass of polypropylene glycol plasticizer and 3 parts by mass of vinyl trimethoxysilane are mixed and stirred uniformly, 1 part by mass of salicylate absorbent and 1 part by mass of 2, 6-butyl-4-methylphenol are added into the mixture, the mixture is stirred until the mixture is uniformly dispersed, 1 part by mass of dibutyl tin dilaurate is added into the mixture, and the mixture is stirred uniformly to obtain the sealant.
The sealants prepared using the silane-modified polyethers provided in examples and comparative examples and using the methods described above were tested. Wherein tensile strength, elongation at break and tensile modulus are measured according to GB/T528-2009. The obtained sealant was applied with a tape, the tape was cured under standard conditions for seven days, the cured tape was baked in an oven at 120 ℃, and the time of chalking of the surface of the tape was recorded, and the results were as shown in table 1 below.
TABLE 1 results of sealant performance
Finally, the method of the present invention is only a preferred embodiment and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. The preparation method of the polyether modified organosilicon polymer is characterized by comprising the following steps of:
s1, activating a double-end hydrogen-containing silane compound, a first Pt catalyst and a first auxiliary agent for 0.5-4 hours at the temperature of-20-50 ℃, dropwise adding double-end allyl-terminated polypropylene glycol, and carrying out heat preservation reaction for 1-8 hours at the temperature of 20-80 ℃ to obtain macromolecular double-end allyl-terminated polypropylene glycol ether;
the first Pt catalyst is triphenylphosphine platinum, wherein the mole ratio of platinum to triphenylphosphine is 2:1, a step of; the molar ratio of the double-end allyl terminated polypropylene glycol to the double-end hydrosilane compound is (1.8-2.2): 1, a step of; the dosage of the first Pt catalyst is 5-100 ppm of the total amount of the reaction raw materials, wherein the dosage of Pt in the reaction system in the step S1 is 5-100 ppm;
the first auxiliary agent is butanone, acetaldehyde, acetylacetone or boron trifluoride diethyl etherate; the mole ratio of the first auxiliary agent to Pt in the reaction system of the step S1 is (1-5): 1;
s2, activating the macromolecular double-end allyl-terminated polypropylene glycol ether obtained in the step S1, a second Pt catalyst and a second auxiliary agent for 0.5-4 hours at the temperature of 30-80 ℃, dropwise adding trimethoxy hydrogen-containing silane, preserving heat for 1-8 hours at the temperature of 60-80 ℃, and removing impurities to obtain a polyether modified organosilicon polymer;
the molar ratio of trimethoxy hydrogen-containing silane to double-end allyl end-capped polypropylene glycol is 1 (0.35-0.6);
the second Pt catalyst is a Speier catalyst; the dosage of the second Pt catalyst is 5-100 ppm of the total amount of the reaction raw materials, wherein the dosage of Pt in the reaction system in the step S2 is 5-100 ppm;
the second auxiliary agent is acetic acid, oxalic acid, citric acid or phosphoric acid; the second auxiliary agent is used in an amount to make the pH value of the system in the step S2 3-5.
2. The method of claim 1, wherein the molecular weight of the polypropylene glycol in the double-ended allyl-terminated polypropylene glycol is 400 to 4000.
3. The method according to claim 1, wherein the double-ended hydrogen-containing silane compound is a hydrogen-containing double-ended head or a hydrogen-containing silicone oil.
4. The method according to claim 3, wherein the double-ended hydrogen-containing silane compound is a double-ended hydrogen-containing silicone oil having a hydrogen content of 0.11 to 0.13%.
5. The method according to any one of claims 1 to 3, wherein in the step S1, the molar ratio of the double-ended allyl-terminated polypropylene glycol to the double-ended hydrosilane compound is (1.95 to 2.05): 1.
6. the production method according to any one of claims 1 to 3, wherein the amount of the first Pt catalyst is such that the amount of Pt in the reaction system of step S1 is 10 to 30ppm based on the total amount of the reaction raw materials.
7. A production method according to any one of claims 1 to 3, wherein the first auxiliary agent is boron trifluoride diethyl etherate.
8. The method according to any one of claims 1 to 3, wherein the molar ratio of the first auxiliary agent to Pt in the reaction system of step S1 is 1.2 to 2:1.
9. A method of preparation according to any one of claims 1 to 3, wherein the second auxiliary agent is acetic acid.
10. The method according to any one of claims 1 to 3, wherein in the step S2, the molar ratio of trimethoxy hydrogen-containing silane to double-end allyl-terminated polypropylene glycol is 1 (0.38 to 0.45).
11. The production method according to any one of claims 1 to 3, wherein the second Pt catalyst is used in such an amount that the amount of Pt in the reaction system of step S2 is 10 to 30ppm based on the total amount of the reaction raw materials.
12. The polyether modified silicone polymer produced by the production method according to any one of claims 1 to 11.
13. Use of the polyether modified silicone polymer of claim 12 in the preparation of a sealant.
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