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Light scattering microsphere containing benzoate polysilsesquioxane, and preparation method and application thereof

A technology of siloxane light and ester trialkoxysilane, which is applied in the field of light-scattering functional masterbatches, can solve problems such as difficulty in uniform dispersion, poor matrix compatibility, and poor heat resistance stability, and achieve good compatibility, The effect of good heat resistance stability, good mechanical properties and thermal properties

Inactive Publication Date: 2012-11-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hubei University disclosed an invention patent (CN201010217719.2) for a synthetic method of a cage-type octasilsesquioxane with the same or different functional groups and non-functional groups at the same time. React with trialkoxysilanes containing vinyl, chloropropyl, mercaptopropyl, and aminopropyl groups under the action of solvents and catalysts to obtain cage-type octasilsesquisiles with the same or different functional groups and non-functional groups oxane, but the functional groups such as chloropropyl, mercaptopropyl, aminopropyl and other functional groups on the cage octasilsesquioxane obtained in this patent have poor heat resistance and stability, and will partially decompose at the processing temperature of polycarbonate
Lin Muli disclosed an invention patent (201110176404.2) for a method of manufacturing light-scattering masterbatches. In this patent, quartz sand is used as light-diffusing particles, which are further wrapped with silicon dioxide produced by the reaction of tetraethyl orthosilicate, and then obtained The light-scattering particles are mixed with additives and polymer matrix, and then extruded and granulated by twin-screw extruder to obtain light-scattering master batches. The light-scattering particles produced by this invention are composed of inorganic components and have poor interaction with the polymer matrix. , it is difficult to disperse evenly
To sum up, the polysilsesquioxanes prepared in the prior art are basically not prepared for the light scattering modification of transparent thermoplastics, and the light scattering agents used as transparent thermoplastics have low thermal stability, and are not compatible with the matrix phase. Poor capacitance, no light scattering function, etc.

Method used

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  • Light scattering microsphere containing benzoate polysilsesquioxane, and preparation method and application thereof
  • Light scattering microsphere containing benzoate polysilsesquioxane, and preparation method and application thereof
  • Light scattering microsphere containing benzoate polysilsesquioxane, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step (1), add 0.30mol Y-chloropropyltriethoxysilane, 0.33mol sodium n-propyl hydroxybenzoate and 518g ethanol in the 1000ml three-neck flask that mechanical stirrer, thermometer are housed, stir and mix, at 80 React at ℃ for 4 hours, cool to room temperature, filter, distill off the ethanol in the filtrate under reduced pressure, and obtain triethoxysilane containing n-propyl benzoate after drying;

[0032] Step (2), add 0.78g tetramethylammonium hydroxide, 195g Virahol and 58.5g water in the 500ml there-necked flask that mechanical stirrer, thermometer are housed, with 0.05mol containing n-propyl benzoate group triethoxy Silane was mixed with 0.1mol phenyltrimethoxysilane and the two silane monomers were added to the reaction flask, stirred and reacted at 25°C for 8 hours, and after standing for 4 hours, a white precipitate precipitated, vacuum filtered, and the mass ratio was After cleaning with a 4:1 mixture of ethanol and water, put it in a vacuum oven and dry at 50...

Embodiment 2

[0036] Step (1), add 0.40mol Y-chloropropyl triethoxysilane, 0.42mol sodium ethyl hydroxybenzoate and 580g ethanol in a 1000ml three-necked flask equipped with a mechanical stirrer and a thermometer, stir and mix, and heat the mixture at 80°C React at room temperature for 2 hours, cool to room temperature, filter, and distill off the ethanol in the filtrate under reduced pressure, and obtain ethyl benzoate-containing triethoxysilane after drying;

[0037] Step (2), add 1.57g potassium hydroxide, 94.2g methyl alcohol and 47.1g water in the 250ml there-necked flask that mechanical stirrer, thermometer are housed, with 0.02mol containing ethyl benzoate group triethoxysilane and 0.1mol Phenyltriethoxysilane and two silane monomers were mixed and added to the reaction flask, stirred and reacted at 50°C for 8 hours, after standing for 5 hours, a white precipitate precipitated, vacuum filtered, and the mass ratio was 4:1 After cleaning with a mixture of ethanol and water, put it into...

Embodiment 3

[0039] Step (1), add 0.50mol Y-chloropropyl triethoxysilane, 0.50mol sodium methyl hydroxybenzoate and 482g ethanol in a 1000ml three-necked flask equipped with a mechanical stirrer and a thermometer, stir and mix, and heat at 50°C React at room temperature for 6 hours, cool to room temperature, filter, distill off the ethanol in the filtrate under reduced pressure, and obtain triethoxysilane containing methyl benzoate after drying;

[0040] Step (2), add 0.3g sodium hydroxide, 238.4g ethanol and 47.7g water in the 500ml there-necked flask that mechanical stirrer, thermometer are housed, with 0.1mol containing methyl benzoate group triethoxysilane and 0.1mol Phenyltriethoxysilane and two silane monomers were mixed and added to the reaction flask, stirred and reacted at 25°C for 12 hours, after standing for 3 hours, a white precipitate precipitated, vacuum filtered, with a mass ratio of 4:1 After cleaning with a mixture of ethanol and water, put it into a vacuum oven, and dry i...

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Abstract

The invention discloses a light scattering microsphere containing benzoate polysilsesquioxane, and a preparation method and application thereof. The light scattering microsphere has a following structural general formula shown in the description; and R represents methyl, ethyl, n-propyl, isopropyl, isobutyl or n-butyl. The molecular structure also comprises a polysilsesquioxane microsphere, which contains benzoate and phenyl organic group, has high thermal stability, good compatibility with matrix and light scattering function. A light scattering functional master batch containing the light scattering microsphere can be used for modification of polycarbonate, has good processing performance and significant effects of opalization and atomization, increases haze of polycarbonate to higher than 90%, and maintains transmittance higher than 80%; besides, the master batch has good light scattering and light permeability, and basically keeps the original good mechanical and thermal properties.

Description

technical field [0001] The invention relates to a light-scattering microsphere, in particular to a benzoate-containing polysilsesquioxane light-scattering microsphere, a preparation method thereof, and a light-scattering functional masterbatch containing the light-scattering microsphere; the benzene-containing The functional masterbatch of formate-based polysilsesquioxane light-scattering microspheres is used for light-scattering modification of transparent thermoplastic resin polycarbonate (PC), which can well meet the needs of LED lampshades. sexual material. Background technique [0002] The molecular formula of polysilsesquioxane is (RSiO 1.5 ) n (R is H, alkyl, alkylene, aryl, arylene or substituents of these groups), the main chain is composed of Si-O-Si bonds, with a structure similar to hard silica, and the side groups are Organic groups, whose molecules themselves have an organic / inorganic hybrid structure, have been used as flame retardants, reinforcing agents, ...

Claims

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Application Information

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IPC IPC(8): C08G77/18C08L69/00C08L33/12C08L25/06C08L83/06C08J3/22F21V3/04F21Y101/02
Inventor 刘述梅袁俊轩赵建青袁彦超蒋智杰
Owner SOUTH CHINA UNIV OF TECH
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