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A tungsten-doped stannic oxide colloidal suspension and method for preparing the same

A colloidal suspension, tin oxide technology, used in tin oxide, instruments, conductive coatings, etc., can solve problems such as insufficient antistatic performance, and achieve good antistatic performance, good dispersion and stability, and low yellowness.

Inactive Publication Date: 2018-01-19
ESSILOR INT CIE GEN DOPTIQUE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, FTO coatings show insufficient antistatic properties

Method used

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  • A tungsten-doped stannic oxide colloidal suspension and method for preparing the same
  • A tungsten-doped stannic oxide colloidal suspension and method for preparing the same
  • A tungsten-doped stannic oxide colloidal suspension and method for preparing the same

Examples

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Effect test

example 1

[0091] Example 1: Preparation of tungsten-doped tin oxide colloidal suspension

[0092] figure 1 A synthetic route for the preparation of TTO colloidal suspensions is shown. The experimental procedure is described below.

[0093] Material:

[0094] Stannous oxalate (Sn2C2O4), oxalic acid (H2C2O4), tungsten powder (W) and hydrogen peroxide (H2O2) were of analytical grade without further purification (Sinopharm Chemical Reagent Co., Ltd.); Deionized water was used in the experiments. The particle size of tungsten powder is less than 74 microns.

[0095] Preparation of TTO nanoparticles:

[0096] TTO nanoparticles with diameter sizes ranging from 9 to 13 nm were synthesized by hydrothermal method. In a typical procedure, stannous oxalate, oxalate dihydrate, and hydrogen peroxide were added to deionized water with vigorous stirring until the solution became clear. The tungsten powder was then dispersed in the solution by an ultrasonic instrument (SY-360, Shanghai Ningshan...

example 2

[0114] Example 2: Use as an antistatic material

[0115] Preparation of ophthalmic lenses:

[0116] TTO colloidal suspensions obtained with the synthesis parameters (with or without PVP) in Table 1 were deposited by spin coating on pre-cleaned on the convex side of the lens and then dried at room temperature over a period of 5 minutes. The thickness of the TTO colloidal layer is listed in Table 2.

[0117] After depositing the TTO colloid, a wear-resistant coating was deposited under standard conditions. A coating with a refractive index of 1.5 (reference HC1.5) as described in EP0614957 and a coating with a refractive index of 1.6 (reference HC1.6) as described in EP0614957 with the addition of high refractive index TiO2 nano particles.

[0118] Comparative lenses were prepared as follows:

[0119] - HC1.5 or HC1.6 without any TCO layer (blank);

[0120] - Lenses coated in the same way as above, but where TTO is replaced by ATO conductive gel (ELCOM V3560 supplied by...

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Abstract

A colloidal suspension of tungsten-doped SnO 2 particles is provided. It also pertains to the method for preparing such colloidal suspension and to its uses, especially in the manufacture of an antistatic coating for an optical article, such as an ophthalmic lens.

Description

technical field [0001] The present invention relates to tungsten-doped SnO 2 Colloidal suspension of particles (TTO nanoparticles). The invention also relates to a process for the preparation of such a colloidal suspension and its use, in particular in the manufacture of antistatic coatings for optical articles such as ophthalmic lenses. Background technique [0002] An optical article typically comprises a transparent optical substrate coated with an optical primer, an abrasion resistant coating (or hard coating) and possibly other layers such as an anti-reflective coating. [0003] These optical articles are generally made substantially of insulating material and tend to have their surfaces become easily electrostatically charged, especially when cleaned under dry conditions by rubbing their surfaces with a wipe, a piece of synthetic foam or polyester. This phenomenon is called triboelectricity. The electric charge present on its surface creates an electrostatic field t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/02
CPCC01G19/02C01P2002/50C01P2002/54C01P2004/64C01P2006/22G02B1/16C09D7/67C01P2006/40C08K2003/2258C08K2201/001C08K2201/005C08K2201/011C09D5/24C09D139/06
Inventor 赵健S·佩嘉施利毅袁帅王竹仪赵尹
Owner ESSILOR INT CIE GEN DOPTIQUE