A kind of hyperbranched polyborosiloxane containing functional group and preparation method thereof

A technology of hyperbranched poly and borosiloxane, applied in the field of polymer material modification, can solve the problems of inability to fully exert the modification effect, poor compatibility of polyborosiloxane, single variety of polyborosiloxane, etc. , to achieve the effects of excellent compatibility, easy process control and low production cost

Active Publication Date: 2021-03-30
QUANZHOU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there are still some deficiencies in the use of existing polyborosiloxanes for modifying polymers, which are mainly manifested in: 1) the variety of polyborosiloxanes is single and cannot meet the requirements of different fields; 2) polyborosilicate The viscosity of oxane is high, and it is often easy to sacrifice the original excellent processing performance of polymer materials; 3) the difference in solubility parameters leads to the general problem of poor compatibility between polyborosiloxane and existing polymer materials, and ultimately cannot fully exert its excellent modifying effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026]1) Under the conditions of stirring and nitrogen protection, first add 23.61g of γ-glycidoxypropyltrimethoxysilane, 5.60g of boric acid, 5.15g of deionized water and 0.09g of 20% tetramethylammonium hydroxide solution into three ports After the flask, reflux at a constant temperature of 30°C for 2 hours;

[0027] 2) Under the conditions of stirring and nitrogen protection, then add 30.89g of trimethylchlorosilane, 18.00mL of methanol and 36.00mL of pyridine into the solution obtained in step 1), and reflux at 40°C for 6 hours. Crude product was obtained after pressure distillation;

[0028] 3) Finally, after dissolving the crude product in 1 g of dichloromethane, the insoluble matter was filtered off, and after vacuum distillation and vacuum drying, the hyperbranched polyborosiloxane was obtained.

[0029] The prepared hyperbranched polyborosiloxane has a viscosity of 400mPa·s at 25°C and has the following molecular formula:

[0030] [(CH 3 ) 3 SiO 1 / 2 ] a [R 1 R ...

Embodiment 2

[0034] 1) Under stirring conditions, first add 23.61g of γ-glycidoxypropyltrimethoxysilane, 9.41g of trimethyl borate, 3.43g of deionized water and 0.04g of KOH into a three-necked flask, and keep the temperature at 90°C Reflux for 30 hours;

[0035] 2) Under stirring conditions, add 15.44g of hexamethyldisiloxane, 5.00mL of n-butanol and 8.30mL of tetrahydrofuran into the solution obtained in step 1), and reflux at 90°C for 20 hours , to obtain the crude product after distillation under reduced pressure;

[0036] 3) Finally, after dissolving the crude product in 1000 g of dichloromethane, the insoluble matter was filtered off, and after vacuum distillation and vacuum drying, the hyperbranched polyborosiloxane was obtained.

[0037] The prepared hyperbranched polyborosiloxane has a viscosity of 80 mPa·s at 25°C and has the following molecular formula:

[0038] [(CH 3 ) 3 SiO 1 / 2 ] a [R 1 R 2 2 SiO 1 / 2 ] b [R 1 R 2 SiO 2 / 2 ] c [R 1 SiO 3 / 2 ] d

[0039] [R 3 ...

Embodiment 3

[0042] 1) Under stirring and nitrogen protection conditions, first add 23.80g 3-mercaptopropyltriethoxysilane, 13.00g triethyl borate, 4.46g deionized water and 0.05g p-toluenesulfonic acid into a three-necked flask, and then Reflux at constant temperature for 4 hours at 65°C;

[0043] 2) Under the conditions of stirring and nitrogen protection, then add a mixed solvent consisting of 23.22g of hexamethyldisiloxane, 20.00mL of ethanol and 10.00mL of pyridine into the solution obtained in step 1), and reflux at 65°C for 7 hours Afterwards, crude product is obtained after distillation under reduced pressure;

[0044] 3) Finally, after dissolving the crude product in 50 g of toluene, the insoluble matter was filtered off, and after vacuum distillation and vacuum drying, the hyperbranched polyborosiloxane was obtained.

[0045] The prepared hyperbranched polyborosiloxane has a viscosity of 100 mPa·s at 25°C and has the following molecular formula:

[0046] [(CH 3 ) 3 SiO 1 / 2 ]...

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Abstract

The invention discloses a hyperbranched polyborosiloxane containing functional groups. The hyperbranched polyborosiloxane containing functional groups has the characteristics of hyperbranched topological structure, stable storage performance, controllable viscosity and the like, and has excellent compatibility with existing high polymer materials. The invention also discloses a preparation methodof the hyperbranched polyborosiloxane containing functional groups, and the preparation method has the advantages of wide monomer source, low cost, easy process control and important application valueand academic significance.

Description

technical field [0001] The invention relates to the field of polymer material modification, in particular to a functional group-containing hyperbranched polyborosiloxane and a preparation method thereof. Background technique [0002] Polyborosiloxane refers to a polymer obtained by replacing some silicon atoms in the siloxane skeleton of polysiloxane with boron atoms. Because the B-O bond and Si-O bond in its molecular structure are high bond energy chemical bonds (bond energy is 537.6kJ / mol, 422.5kJ / mol respectively), and there are p-π and d-π conjugation in the structure, Therefore, the high temperature resistance of polyborosiloxane is better than that of polysiloxane. At the same time, compared with polydimethylsiloxane, polyborosiloxane shows excellent adhesive properties at high temperatures. For example, when used above 600 ° C, polydimethylsiloxane is often affected by thermal degradation products. The adhesion of the substrate is too poor and it will fall off, thu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/22C08G77/08C08G79/08
CPCC08G77/08C08G77/22C08G79/08
Inventor 李文杰卓东贤刘小英郑燕玉罗水源翟波陈少云林晓敏
Owner QUANZHOU NORMAL UNIV
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