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Silane modified polyether as well as preparation method and application thereof

A silane-modified polyether and polyether technology, applied in polyether adhesives, adhesive types, adhesives, etc., can solve the adverse effects of mechanical properties, sealing properties and weather resistance, sealant preparation and sealant Adverse effects of performance, adverse effects of sealant performance, etc., to achieve excellent sealing effect, stable storage, and stable product performance.

Inactive Publication Date: 2019-12-20
WUHAN OXIRAN SPECIALTY CHEM CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silicone glue has good elasticity, heat resistance, heat resistance and weather resistance, but the pollution resistance of silicone glue is poor, and the joints of silicone glue are prone to serious pollution, which has a great impact on the overall product aesthetics , Furthermore, silicone glue has poor paintability and poor tear strength
Polyurethane sealant has the advantages of high strength, high bonding strength, impact resistance, tear resistance, and low temperature curing. However, the curing principle of polyurethane sealant is that isocyanate reacts with moisture. During the reaction process, carbon dioxide will be released to form bubbles. Air bubbles have adverse effects on the mechanical properties, sealing performance and weather resistance of the material.
Both silane-modified polyurethane resin and polyurethane resin have very high viscosity, but the double-bonded oxygen atom in the urethane group in the silane-modified polyurethane resin and the polyurethane resin and the hydrogen atom above the nitrogen atom in the adjacent polymer chain Weak hydrogen bonds are formed, which have adverse effects on the preparation of sealants and the performance of sealants. For silane-modified polyurethane resins and polyurethane resins, it is generally achieved by adding solvents or plasticizers to reduce the viscosity, but in the end it will also affect the performance of the sealants. Its sealant performance will have adverse effects, and solvent volatilization will cause environmental problems

Method used

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  • Silane modified polyether as well as preparation method and application thereof
  • Silane modified polyether as well as preparation method and application thereof
  • Silane modified polyether as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Add 12.5g propylene glycol ether and 12.5g glycerol ether composite oligomer starter (about 280mgKOH / g) and 0.1g bimetallic complex catalyst that 12.5g propylene glycol ether and 12.5g glycerol ether form in the stainless steel reactor, adjust the temperature range in the reactor 90 to 140° C., feed propylene oxide or ethylene oxide to initiate the reaction and obtain a first mixture.

[0048] Continue to feed 975g of propylene oxide until the reaction is complete, then the first mixture is sequentially aged for 0.5 to 2 hours, vacuum degassed for 1 to 2 hours, and cooled to 40 to 60°C to obtain a polymer with a special structure Polyether (hydroxyl value: 7.02 mgKOH / g).

[0049] Add 0.8g dibutyltin dilaurate, 5g triethylene glycol ether-bis(3-tert-butyl-4-hydroxyl-5-methylphenyl) propionate and 5g three (2,4-di-tert-butyl) phenyl phosphite, further dropwise add 7.5g isocyanate propyl dimethoxysilane and 19.0g isocyanate propyl trimethoxysilane to obtain a second mixtu...

Embodiment 2

[0051] In the stainless steel reactor, add 27.0g1, the composite oligomer initiator (the about 220mgKOH / g of hydroxyl value) and 0.06g bimetallic complex catalyst that 4-butanediol ether and 14.8g glycerol ether are formed, adjust The temperature range in the reaction kettle is 90 to 140° C., and propylene oxide or ethylene oxide is introduced to initiate the reaction and obtain a first mixture.

[0052] Continuously feed 900g of propylene oxide and 60g of ethylene oxide until the reaction is complete, then sequentially perform aging treatment on the first mixture for 0.5 to 2 hours, vacuum degassing treatment for 1 to 2 hours, and cool to 40 to 60°C to obtain a A special structure high polymer polyether (hydroxyl value 9.3mgKOH / g).

[0053] Add 1.2g diheptyltin dilaurate, 10g beta-(3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate to the special structure high polymer polyether, further drop Add 29g isocyanate propyltrimethoxysilane and 8.5g isocyanate propyltriethoxys...

Embodiment 3

[0055] Add 27.0g propylene glycol ether, 1.5g ethylenediamine polyether and 1.5g diethylenetriamine polyether composite oligomer initiator (hydroxyl value about 370mgKOH / g) and 0.1g bimetallic To complex the catalyst, adjust the temperature range in the reactor to 90 to 140° C., feed propylene oxide or ethylene oxide to initiate the reaction and obtain a first mixture.

[0056] Continue to feed 890g of propylene oxide and 80g of ethylene oxide until the reaction is complete, then sequentially perform aging treatment on the first mixture for 0.5 to 2 hours, vacuum degassing treatment for 1 to 2 hours, and cool to 40 to 60°C to obtain a A special structure high polymer polyether (hydroxyl value 11.2mgKOH / g).

[0057] Add 1.5g zinc octadecanoate, 5g beta-(3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate and 0.1g sodium hypophosphite in the special structure polymer polyether , further drop 4g isocyanate methyl dimethoxysilane, 35g isocyanate propyl trimethoxysilane and 5....

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Abstract

The invention provides a preparation method of silane modified polyether. The preparation method comprises the following steps: adding a thermometal complexing catalyst and initiators with different functionality degrees into a reaction kettle, adjusting the temperature ranging from 90 DEG C to 140 DEG C in the reaction kettle, and introducing epoxypropane or ethylene oxide to initialize a reaction so as to obtain a first mixture; introducing epoxypropane or ethylene oxide till the reaction is completed, performing aging treatment on the first mixture for 0.5-2 hours, performing vacuum degassing for 1-2 hours, and performing cooling to 40-60 DEG C so as to obtain high polymer polyether of a special structure; adding a catalyst for silane termination, a stabilizer for silane termination andisocyanate group alkoxy silane into the polymer polyether of the special structure so as to obtain a second mixture, performing a reaction on the second mixture at 40-80 DEG C for 2-10 hours, collecting a sample of the second mixture in the reaction period, performing infrared characteristic peak testing on the sample, and terminating the reaction when detecting that there is no infrared characteristic peak, so as to obtain the silane modified polyether. The invention further provides the silane modified polyether and application thereof.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a novel silane-modified polyether, its preparation method and application. Background technique [0002] Sealant is an indispensable material in the fields of construction, transportation and assembly. High-performance sealant has attracted more and more attention. Although the amount and cost of sealant account for a small proportion of the total application field, it often plays an important role in product performance. to a decisive role. [0003] At present, the sealant products on the market are mainly silicone glue, polyurethane sealant and silane-modified polyurethane sealant, among which silicone glue occupies the vast majority of the domestic market. Silicone glue has good elasticity, heat resistance, heat resistance and weather resistance, but the pollution resistance of silicone glue is poor, and the joints of silicone glue are prone to serious pollution, which has a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/336C08G65/26C08G65/28C09J171/02
CPCC08G65/2609C08G65/2624C08G65/336C08K2003/265C08K2201/014C08L2201/08C09J171/02C08L83/04C08K13/02C08K3/36C08K3/26C08K5/12
Inventor 张静任凡耿聪王辉王亮付艳梅胡哲付远波刘敏江晨浩
Owner WUHAN OXIRAN SPECIALTY CHEM CO
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