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Organosilicon wear-resistant hardening coating, preparation method thereof, and plastic treatment method

A technology of organosilicon and hard coating, which is applied in the direction of coating, etc., can solve the problems of affecting the use effect, poor temperature resistance of epoxy resin, easy aging and yellowing, etc., and achieves the increase of raw material cost, low cost and easy availability of raw materials Effect

Inactive Publication Date: 2020-06-12
郭芳敏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The temperature resistance of epoxy resin is poor, easy to aging and yellowing, affecting the use effect

Method used

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  • Organosilicon wear-resistant hardening coating, preparation method thereof, and plastic treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 11 parts of ethyl orthosilicate, 20 parts of vinyltrimethoxysilane, 15 parts of methylvinyldimethoxysilane, 20 parts of γ-mercaptopropyl trimethoxysilane, 15 parts of methyl γ-mercaptopropyl Add dimethoxysilane, 0.15 parts of benzoin dimethyl ether, 16 parts of absolute ethanol and 4 parts of butyl acetate into the container in turn, stir evenly, add 12 parts of dilute sulfuric acid solution with a pH of 2.5 dropwise while stirring, and add dropwise After continuing to stir for 1 hour, let it stand for 5 days to obtain hydrolyzate 1; before use, add 0.5 parts of tetramethylammonium hydroxide and 0.08 parts of boron trifluoride to hydrolyzate 1, stir evenly, and obtain silicone wear-resistant Hardening coating 1. The viscosity (25° C.) of silicone wear-resistant and hardening coating 1 is 12 mPa·s.

[0027] Clean and dry the optical grade PC after degreasing and immersing it in the silicone wear-resistant and hardening coating 1 for 9 seconds, lift it up, dry it, irradi...

Embodiment 2

[0029] 15 parts of ethyl orthosilicate, 25 parts of vinyltriethoxysilane, 20 parts of methylvinyldiethoxysilane, 14 parts of γ-mercaptopropyl triethoxysilane, 20 parts of methyl γ-mercapto Add propyldiethoxysilane, 0.2 parts of benzoin dimethyl ether, 20 parts of absolute ethanol and 5 parts of ethylene glycol monomethyl ether into the container in turn, stir evenly, and add 15 parts of oxalic acid with a pH of 3 dropwise while stirring Solution, continue to stir for 50 minutes after the dropwise addition, and then stand still for 7 days to obtain hydrolyzate 2; before use, add 0.3 parts of tetramethylammonium hydroxide and 0.08 parts of DMF to the hydrolyzate 2, stir evenly, and obtain silicone resistant Grinding Hard Coating 2. The viscosity (25° C.) of the silicone wear-resistant hardening coating 2 is 9 mPa·s.

[0030] Clean and dry the optical-grade PC after degreasing and soaking in the silicone wear-resistant and hardening coating 2 for 15 seconds, lift it up, dry it, ...

Embodiment 3

[0032] 20 parts of ethyl orthosilicate, 30 parts of vinyltriethoxysilane, 30 parts of methylvinyldiethoxysilane, 10 parts of γ-mercaptopropyl triethoxysilane, 25 parts of methyl γ-mercapto Propyldiethoxysilane, 0.1 part of benzoin dimethyl ether, 25 parts of absolute ethanol and 5 parts of ethylene glycol monoethyl ether were sequentially added into the container, stirred evenly, and 20 parts of dilute sulfuric acid with a pH of 3.5 were added dropwise while stirring Solution, continue to stir for 1 hour after the dropwise addition, and then stand still for 4 days to obtain hydrolyzate 3; before use, add 0.8 parts of tetramethylammonium acetate and 0.1 part of boron trifluoride to hydrolyzate 3, stir evenly, and obtain organic Silicon wear-resistant and hardened coating3. The viscosity (25° C.) of the silicone wear-resistant hardening coating 3 is 10 mPa·s.

[0033] After degreasing and drying the optical grade PMMA, soak it in the silicone wear-resistant and hardening coatin...

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Abstract

The invention belongs to the technical field of coatings, and concretely relates to an organosilicon wear-resistant hardening coating, a preparation method thereof, and a plastic treatment method. Thecoating is prepared from, 10 to 20 parts of tetraalkoxy silane, 20 to 30 parts of vinyl trialkoxy silane, 15 to 30 parts of methyl vinyl dialkoxy silane, 10 to 20 parts of gamma-mercaptopropyltrialkoxysilane, 15 to 30 parts of methyl gamma-mercaptopropyldialkoxysilane, 10 to 20 parts of an acidic solution, 0.2 to 1.0 part of a curing agent, 0.05 to 0.3 part of a curing accelerator, 0.1 to 0.3 part of benzoin dimethyl ether and 10 to 30 parts of an organic solvent. The organosilicon wear-resistant hardening coating is used for surface treatment of optical plastics, and a transparent coating layer with high hardness, wear resistance and good adhesion is obtained through dip-coating, lifting, airing, ultraviolet irradiation and heating drying.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to an organosilicon wear-resistant and hardened coating, a preparation method and a plastic processing method. Background technique [0002] Optical plastics, including polycarbonate (PC) and plexiglass (PMMA), have the advantages of light weight, high light transmittance, good moisture resistance and impact resistance, and easy processing and molding. They have been widely used in aerospace, automotive transportation, Daily necessities and other fields. However, due to the fact that optical plastics are organic matter, their surface hardness is relatively low, and they are easy to wear during use, which seriously affects their performance. An effective treatment method is to harden its surface. Among them, silicone material is a commonly used treatment material. [0003] CN105295083A discloses a transparent plastic with a hardening coating and a preparation method t...

Claims

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Application Information

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IPC IPC(8): C09D183/08C08G77/28C08J7/046C08L69/00C08L33/12C08L25/06
CPCC08G77/28C08J2325/06C08J2333/12C08J2369/00C08J2483/08C09D183/08
Inventor 郭芳敏
Owner 郭芳敏
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