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Polyoxysilane and preparation method thereof, and glass protection composition and use thereof

A composition, polysiloxane technology, applied in coatings, fire-retardant coatings, etc., can solve problems such as difficult glass protection

Active Publication Date: 2020-06-02
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this disclosure is to provide a polyoxysilane and its preparation method, a glass protection composition containing the polysiloxane and its application, so as to overcome the defect that it is difficult to achieve glass protection at high temperatures in the prior art

Method used

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  • Polyoxysilane and preparation method thereof, and glass protection composition and use thereof
  • Polyoxysilane and preparation method thereof, and glass protection composition and use thereof
  • Polyoxysilane and preparation method thereof, and glass protection composition and use thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0115] In a 250mL three-necked flask with a reflux condenser, a stirrer and a thermometer, add 50g (0.4167mol) of dimethyldimethoxysilane, 40g (0.1639mol) of diphenyldimethoxysiloxane, and 11.4959g ( 0.6387mol) and 0.5040g of phosphoric acid catalyst of 10% by weight, N 2 Under protection, start to stir slowly, raise the temperature to 80°C; keep warm for 2h; add 17.5102g of γ-glycidyl etheroxypropylmethyldiethoxysilane dropwise at a rate of 3mL / min, keep warm at 80°C for 5h, then Add 0.8497 g of triphenylmethoxysiloxane and keep it warm for 1 hour to obtain the first intermediate product. The molar ratio of the first monomer, the second monomer and the third monomer is 1:0.01:0.005.

[0116]When the temperature reaches the reaction temperature of 70°C, slowly dropwise add 2.0919g of acrylic acid, 0.36g of hydroquinone as a polymerization inhibitor and N,N-dimethylaniline as a catalyst to the above-mentioned first intermediate product at a rate of 3.5mL / min. 0.9 g of the mix...

preparation Embodiment 2

[0119] In a 250mL three-necked flask with reflux condenser, stirrer and thermometer, add dimethyldimethoxysilane 40g (0.3333mol) and diphenyldimethoxysiloxane 60g (0.2459mol), water 10.4262g and 10% by weight phosphoric acid catalyst 1.22g, N 2 Under protection, start to stir slowly, raise the temperature to 90°C; keep warm for 12h; add 28.7764g of γ-glycidyl etheroxypropylmethyldiethoxysilane dropwise at a rate of 2.5mL / min, keep warm at 90°C for 6h, Then 1.6954 g of triphenylmethoxysiloxane was added and kept for 1 hour to obtain the first intermediate product. The molar ratio of the first monomer, the second monomer and the third monomer is 1:0.2:0.01.

[0120] When the temperature reaches the reaction temperature of 80°C, slowly dropwise add 10.0175g of acrylic acid, 0.8g of hydroquinone as a polymerization inhibitor and N,N-dimethylaniline as a catalyst to the above-mentioned first intermediate product at a rate of 2.5mL / min. 2 g of the reaction mixture was formed. Slo...

preparation Embodiment 3

[0123] In a 250mL three-necked flask with a reflux condenser, a stirrer and a thermometer, add 50g (0.4167mol) of dimethyldimethoxysilane, 50g (0.2049mol) of diphenyldimethoxysiloxane, and 13.4262g of water ( 0.74592mol) and 10% by weight of phosphoric acid catalyst 2g, N 2 Under protection, start to stir slowly, raise the temperature to 80°C; keep warm for 2h; add 1.5440g of γ-glycidyl etheroxypropylmethyldiethoxysilane dropwise at a rate of 4mL / min, and the dropping time is 15min. Insulate at 80°C for 1 hour, then add 36.3876 g of triphenylmethoxysiloxane, and incubate for 1 hour to obtain the first intermediate product. γ The molar ratio of the first monomer, the second monomer and the third monomer is 1:0.01:0.2.

[0124] When the temperature reaches the reaction temperature of 70°C, slowly add 0.6719 g of acrylic acid, 1 g of inhibitor hydroquinone and 0.1 g of catalyst N,N-dimethylaniline dropwise at a rate of 40 mL / min to the above-mentioned first intermediate product ...

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Abstract

The invention relates to polyoxysilane and a preparation method thereof, and a glass protection composition and application thereof, wherein the composition comprises polysiloxane and polycarboxyl cage phenyl silsesquioxane based on the total weight of the composition. The glass protection composition disclosed by the invention can be used for effectively and temporarily protecting glass under a high-temperature condition, is particularly suitable for protecting a high-temperature hot bending process, and has the advantage of being easy to remove after the protection is completed.

Description

technical field [0001] The disclosure relates to a polyoxysilane, a preparation method thereof, a glass protection composition and applications thereof. Background technique [0002] With the rapid development of communication technology, 5G communication system has begun to be studied. The corresponding hardware is also an important research project for major mobile phone companies. Among them, 3D glass, ceramics and other materials have become the first choice for mobile phone screen and mobile phone back cover materials due to their small shielding signal and beautiful appearance. The process of glass product preparation includes cutting, CNC cutting and edging, high temperature bending, polishing and other processes. Temporary protection of glass can reduce product scratches and surface defects, thereby increasing yield and reducing product cost. [0003] The protection of glass screens is currently limited to normal or low temperature (less than 200°C), mainly to pro...

Claims

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Application Information

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IPC IPC(8): C08G77/38C09D183/06C09D7/65C03C17/30
CPCC03C17/30C08G77/38C08L2201/08C08L2205/025C09D5/18C09D183/06C09D7/65C08L83/06
Inventor 冷世伟刘萌刘伟
Owner BYD CO LTD
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