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Silane modified polyether and preparation method thereof

A technology of silane-modified polyether and polyether, which is applied in the field of sealants, can solve the problems of cumbersome self-synthesis process and difficulty in obtaining it, and achieve the effect of simple and controllable reaction conditions and good bonding performance

Active Publication Date: 2019-08-13
ZHEJIANG XINAN CHEM INDAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, allyl polyether with a molecular weight of 2,000-20,000 is difficult to obtain, and the self-synthesis process is cumbersome. At the same time, heavy metal platinum catalysts are used in both steps.

Method used

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  • Silane modified polyether and preparation method thereof
  • Silane modified polyether and preparation method thereof
  • Silane modified polyether and preparation method thereof

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preparation example Construction

[0066] The present invention also provides a preparation method of silane polyether, comprising:

[0067] The polyether intermediate with formula (II) structure is reacted with hydrosilane to obtain the silane-modified polyether of formula (I) structure;

[0068]

[0069] where the R 1 , R 2 , R 3 and R 4 One or more independently selected from C1-C10 alkyl groups, C6-C30 phenyl groups and C2-C15 hydrocarbon groups containing functional groups;

[0070] The R 5 , R 6 , R 7 , R 8 , R 9 and R 10 One or more independently selected from C1-C10 alkyl groups and C1-C10 alkoxy groups;

[0071] The m is an integer of 68-520;

[0072] Said n is an integer of 0-18.

[0073] According to the present invention, the present invention reacts the polyether intermediate having the structure of formula (II) with hydrogen-containing silane to obtain the silane-modified polyether of formula (I); wherein, the hydrogen-containing silane is trimethoxy hydrogen-containing One or more...

Embodiment 1

[0083] Add 100 parts of hydroxyl-terminated polyether (m=85, n=0) with a molecular weight of 4948 Daltons into the reaction vessel, and after heating up to 80°C, slowly add 5 parts of tetramethyldivinyldisilazane dropwise into the above solution, and after reacting for 3 hours, vacuumize to remove excess tetramethyldivinyldisilazane to obtain a polyether intermediate;

[0084] Structural identification is carried out to the obtained intermediate, and the results are shown in figure 1 , figure 1 The infrared spectrogram of the polyether intermediate obtained for the embodiment 1 of the present application;

[0085] Add 11 parts of triethoxyhydrogen-containing silane to the polyether intermediate and stir evenly, raise the temperature to 80°C, add 5 mg / kg Speier catalyst, and react for 2 hours to obtain a silane-modified polyether product with a viscosity of 3760 cp at 25°C.

[0086] Structural identification of the obtained silane-modified polyether was carried out, the resul...

Embodiment 2

[0088] Add 100 parts of hydroxyl-terminated polyether (m=148, n=0) with a molecular weight of 8602 Daltons into the reaction vessel. Disilazane was slowly added dropwise to the above solution, and after reacting for 5 hours, the excess dimethyl bis(trifluoropropyl) divinyl disilazane was removed by vacuuming to obtain a polyether intermediate;

[0089]Add 6 parts of methyldiethoxysilane to the polyether intermediate and stir evenly, raise the temperature to 80°C, add 5 mg / kg Speier catalyst, and react for 3 hours to obtain a silane-modified polyether product with a viscosity of 9100cp at 25°C.

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Abstract

The invention provides a silane modified polyether and a preparation method thereof. According to the silane modified polyether with the structure shown in a formula (I), the polyether is prepared byselecting specific raw materials and adjusting the molecular weight of the polyether and the type of a silane end capping agent, the adjustment of the mechanical strength and curing rate of an MS polymer can be achieved, MS adhesives with a series of strengths and curing speeds are obtained when the polyether is used in formulas, the synthesis of a polyether intermediate in the method does not need to use a catalyst, the reaction conditions are simple and controllable, a toxic reagent allyl chloride / allyl bromide is not used, chain extension is not needed (a chain extender methylene halide cannot be used), an organotin catalyst used in silane modified polyurethane is also avoided, no salt by-products are produced, the silane modified polyether is safe, environmentally friendly and free ofpollution, and the preparation method is an environment-friendly and energy-saving method for synthesizing the polyether.

Description

technical field [0001] The invention relates to the field of sealants, in particular to a silane-modified polyether and a preparation method thereof. Background technique [0002] Building energy conservation and green buildings are the current goals of urban construction and development. By 2020, the proportion of prefabricated building area in new residential area will reach 15%. Prefabricated buildings are mainly prefabricated concrete components produced in factories, and are designed and constructed concrete structure houses through on-site assembly. As the most important caulking material for prefabricated buildings, sealant is mainly used for connection and sealing between various components, especially prefabricated exterior wall panels (PC wall panels). MS sealant has excellent paintability and environmental friendliness. At the same time, it has good adhesion to concrete building materials. Whether it is the joint bonding of cement fiber wall panels on the exterio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/00C09J171/00C09J11/04C09J11/06C09J11/08
CPCC08G65/00C08K2003/2241C08K2003/265C08K2201/011C08K2201/014C09J11/04C09J11/06C09J11/08C09J171/00C08L77/00C08K13/02C08K5/12C08K3/26C08K3/22
Inventor 朱瑞华金培玉谢江徐璐刘继方淑琴吴军杨善志
Owner ZHEJIANG XINAN CHEM INDAL GROUP
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