Preparation method of organic silicon modified polyether polyol

A polyether polyol and organosilicon technology, which is applied in the field of preparation of organosilicon modified polyether polyol, can solve the problems of low production efficiency, difficult control of the reaction process for synthesizing polyurethane, large difference in reaction rate, etc. The effect of migration, smooth and delicate hand feeling, mild and easy-to-control reaction process

Inactive Publication Date: 2018-08-17
江西三越新材料有限公司
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Problems solved by technology

[0006] In order to solve the above-mentioned technical problems, the present invention provides a method for preparing silicone-modified polyether polyols, to solve the problem that existing polyether polyols have the same reaction rate with isocyanates as ordinary polyols during the polyurethane reaction process. The reaction rate of isocyanate is quite different, the production efficiency is low, and the reaction process of synthesizing polyurethane is difficult to control. A method for preparing organosilicon-modified polyether polyol, the organosilicon-modified polyether polyol The simplified structure is:

Method used

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  • Preparation method of organic silicon modified polyether polyol

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preparation example Construction

[0044] A kind of preparation method of organosilicon modified polyether polyol specifically comprises the following steps:

[0045] S101: Preparation of terminal hydrogen-containing silicone oil; in S101, the preparation of the terminal hydrogen-containing silicone oil uses octamethylcyclotetrasiloxane, tetramethyldisiloxane, and catalyst A as raw materials, under nitrogen protection Stir in the reactor of the device to raise the temperature, keep the heat for a certain period of time, and obtain terminal hydrogen-containing silicone oil.

[0046] S102: Preparation of allyl polyether; in S102, the preparation of the allyl polyether uses allyl alcohol, ethylene oxide, propylene oxide, and catalyst B as raw materials, and adds allyl in the reactor Alcohol, catalyst B, close the reactor, replace the air in the reactor with nitrogen, remove trace moisture under reduced pressure at room temperature, raise the temperature, first pass propylene oxide or a mixture of propylene oxide a...

Embodiment 1

[0075] Add 270g of octamethylcyclotetrasiloxane, 40.2g of tetramethyldisiloxane, and 0.03g of trifluoroacetic acid into the reactor, stir and raise the temperature to 35°C, and keep the temperature for 12 hours to obtain terminal hydrogen-containing silicone oil. 1034.

[0076] Add 104.4g of allyl alcohol and 0.31g of potassium hydroxide into the reactor, stir, replace the air in the reactor with nitrogen three times, reduce the pressure to -0.090MPa, raise the temperature to 70°C, and feed 1586g of propylene oxide to adjust the The feed rate of propane keeps the pressure in the reactor ≤0.4MPa and the temperature at 100-150°C. After the reaction, reduce the pressure to ≤0.097MPa and keep for 0.5 hours to remove low boilers, then feed 79g of ethylene oxide, and reduce the pressure after the reaction Keep to ≤0.097MPa for 0.5 hours to remove low boilers. Transfer the above material to the post-treatment reactor, add 0.33g of acetic acid and stir for 15min, then add 35.4g of ac...

Embodiment 2

[0079] Add 315g of octamethylcyclotetrasiloxane, 6.7g of tetramethyldisiloxane, and 0.1g of trifluoromethanesulfonic acid into the reactor, stir and raise the temperature to 60°C, and keep the temperature for 5 hours to obtain terminal hydrogen-containing silicone oil. The relative molecular mass is 6434.

[0080] Add 348g of allyl alcohol and 0.35g of sodium metal into the reactor, stir for 0.5h to completely dissolve the sodium metal, replace the air in the reactor with nitrogen three times, reduce the pressure to -0.085MPa, raise the temperature to 100°C, and feed 1086g of propylene oxide , adjust the feeding rate of propylene oxide to keep the pressure in the reactor ≤0.4MPa, temperature 100-150°C, reduce the pressure to ≤0.097MPa after the reaction and keep for 0.5 hours to remove low boilers, then feed 264g of ethylene oxide, After the reaction, reduce the pressure to ≤0.097MPa and keep for 0.5 hours to remove low boilers. Transfer the above material to the post-treatme...

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Abstract

The invention provides a preparation method of organic silicon modified polyether polyol. The preparation method comprises following steps: step one, preparing terminal hydrogen containing silicone oil; step two, preparing allyl polyether; and step three, preparing organic silicon modified polyether polyol. The preparation method has the advantages that the structural characteristics of common polyether polyol are maximally preserved; the speed of reactions between modified polyether polyol and isocyanate is similar with that of reactions between common polyether polyol and isocyanate; modified polyether polyol can completely or partially replace common polyether polyol; modified polyether polyol can be used with polyester polyol to synthesize polyurethane, moreover, the reaction process is mild and easily controllable, the synthesized polyurethane is used to paint a material, the coated material is smooth and has a good wear resistant performance, and no surface migration happens.

Description

technical field [0001] The invention belongs to the field of polyether polyol manufacture, and in particular relates to a preparation method of organosilicon-modified polyether polyol. Background technique [0002] Polyether polyol is the main raw material for the synthesis of polyurethane. Polyurethane is the abbreviation of polyurethane, which refers to a class of polymers containing carbamate groups in the main chain of macromolecules. Polyurethane is divided into two categories: polyester polyurethane and polyether polyurethane. For polyether polyurethane, due to the low cohesive energy and easy rotation of the ether bond in the molecular structure of the raw material polyether polyol, the polyurethane material prepared from it has good low-temperature flexibility and excellent hydrolysis resistance, and the raw material system has low viscosity and is easy to rotate. It is miscible with isocyanate and auxiliary components, and has excellent processing performance. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/46C08G18/50C08G18/61
CPCC08G18/5096C08G18/61C08G77/46
Inventor 袁志军鄢红阳
Owner 江西三越新材料有限公司
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