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Organic silicon resin capable of cuing at room temperature and mixed with boron and preparation method and application thereof

A room-temperature curing and boron-doped technology, which is applied in coatings and other directions, can solve problems such as long curing time, high cost, and poor adhesion to substrates, and achieve dense and smooth coating films, good environmental friendliness, and excellent high temperature resistance sexual effect

Active Publication Date: 2013-02-20
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although silicone resin has many advantages, there are also many shortcomings. The main disadvantage is that the curing temperature is very high (150-200°C) and the curing time is very long, which makes the construction of silicone resin difficult and difficult. high cost
Moreover, the anti-corrosion ability is poor at high temperature, the adhesion to the substrate is poor, and the organic solvent resistance is poor. When the temperature is high, the mechanical strength of the paint film is not good, thus limiting its application.

Method used

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  • Organic silicon resin capable of cuing at room temperature and mixed with boron and preparation method and application thereof
  • Organic silicon resin capable of cuing at room temperature and mixed with boron and preparation method and application thereof
  • Organic silicon resin capable of cuing at room temperature and mixed with boron and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1. Preparation of hydrolyzate

[0032] Add 0.10mol (31.4mL) n-octyltriethoxysilane, 0.04mol (6.6mL) dimethyldiethoxysilane, 0.035mol boric acid powder, 40mL absolute ethanol to a four-neck round bottom flask, and pack After stirring the device and stirring evenly, set the temperature of the oil bath to 70°C. When the temperature rises to 70°C, slowly add 0.6mL (1mol / L) hydrochloric acid dropwise, and then pipette 3.96mL (hydrolysis rate: 80%) deionized water , slowly added dropwise into a four-necked flask, and continued constant temperature hydrolysis for 3 hours after the dropwise addition, to obtain a clear and transparent hydrolyzed solution.

[0033] Step 2. Preparation of boron-doped silicone resin

[0034] Change the reaction device of step 1 into a vacuum distillation device, and carry out vacuum distillation to the hydrolyzate. The distillation temperature is the temperature during the hydrolysis reaction. After the small molecular substances are evapora...

Embodiment 2

[0036] Step 1. Preparation of hydrolyzate

[0037] Add 0.10mol (14.1mL) methyltrimethoxysilane, 0.04mol (6.6mL) dimethyldiethoxysilane, 0.035mol boric acid, 60mL absolute ethanol into a four-neck round bottom flask, install the stirring device and After stirring evenly, set the temperature of the oil bath to 60°C. When the temperature rises to 60°C, slowly add 0.5mL (1mol / L) hydrochloric acid dropwise, then pipette 1.98mL (hydrolysis rate 40%) deionized water, slowly drop Add it to a four-neck flask, and continue to hydrolyze at constant temperature for 2 hours after the dropwise addition to obtain a clear and transparent hydrolyzate.

[0038] Step 2. Preparation of boron-doped silicone resin

[0039] Change the reaction device of step 1 into a vacuum distillation device, and carry out vacuum distillation to the hydrolyzate. The distillation temperature is the temperature during the hydrolysis reaction. After the small molecular substances are evaporated, the temperature is ...

Embodiment 3

[0041] Step 1. Preparation of hydrolyzate

[0042] Add 0.16mol (37.1mL) propyltriethoxysilane, 0.04mol (6.6mL) dimethyldiethoxysilane, 0.040mol boric acid powder, 22mL absolute ethanol to a four-necked round bottom flask, and stir After the device is stirred evenly, set the temperature of the oil bath to 65°C. When the temperature rises to 65°C, slowly add 0.4mL (1mol / L) hydrochloric acid dropwise, and then pipette 4.75mL (hydrolysis rate: 60%) deionized water. Slowly add it dropwise into a four-necked flask, and continue to hydrolyze at a constant temperature for 2 hours after the dropwise addition to obtain a clear and transparent hydrolyzate.

[0043] Step 2. Preparation of boron-doped silicone resin

[0044] Change the reaction device of step 1 into a vacuum distillation device, and carry out vacuum distillation to the hydrolyzate. The distillation temperature is the temperature during the hydrolysis reaction. After the small molecular substances are evaporated, the temp...

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Abstract

The invention discloses an organic silicon resin capable of curing at room temperature and mixed with boron and a preparation method and an application thereof. The structure of the organic silicon resin mixed with boron is shown as the following formula and has excellent high temperature resistance and high curing activity compared with ordinary organic silicon resin. A coated film can be actually dried at the temperature of 100 DEG C after 5-10 min, and can be actually dried at the room temperature after 30-60 min, and the cured coated film can totally overcome the phenomenon of repeated adhesion. The organic silicon resin capable of curing at room temperature and mixed with boron uses diluents and curing agents low in toxicity when used for curing films and is environment-friendly. The synthetizing route is concise and easy to operate, the raw materials are easy to obtain, and the organic silicon resin is suitable for pilot plant test and industrial production.

Description

technical field [0001] The invention belongs to the technical field of light industry and chemical materials, and more specifically relates to a room-temperature-curable boron-doped silicone resin and its preparation method and application. The silicone resin can be used as a matrix resin for high-temperature-resistant coatings . Background technique [0002] Since the middle of the 20th century, the demand for high temperature resistant coatings in various industries has been increasing, and a lot of material and manpower have been invested in research and product development at home and abroad. At present, there are reports of high-temperature-resistant coatings with the highest resistance to 2000 ° C, but our country’s research strength and technology in this area are relatively weak, and both equipment and technology are relatively lacking. There are many coating products at ℃. [0003] The main chain of silicone resin is -Si-O-Si- skeleton, and the bond energy of -Si-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/22C09D183/08
Inventor 郝志峰张进吴雅红余倩王丹余坚
Owner GUANGDONG UNIV OF TECH
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