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A cross-shaped siloxane polymer containing polymerizable functional groups and hydrophilic groups and its preparation process

A preparation process and technology of polysiloxane, which can be used in instruments, glasses/goggles, optics, etc., and can solve problems such as moisture content drop

Active Publication Date: 2020-07-31
YUNG SHENG OPTICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although linear siloxane can be modified to make it more hydrophilic, but the linear siloxane has a one-dimensional structure, and its oxygen permeability is often lower than that of the two-dimensional cross-shaped siloxane. Although the cruciform siloxane has a good oxygen permeability, due to its hydrophobic nature, it will also cause a decrease in its water content.

Method used

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  • A cross-shaped siloxane polymer containing polymerizable functional groups and hydrophilic groups and its preparation process
  • A cross-shaped siloxane polymer containing polymerizable functional groups and hydrophilic groups and its preparation process
  • A cross-shaped siloxane polymer containing polymerizable functional groups and hydrophilic groups and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] The first hydrosilylation reaction: the synthesis of cruciform siloxane small molecules containing polymerizable functional groups.

[0079] Allyl methacrylate (10.52g, 83.39mmol), stabilizer: 4-methoxyphenol (4-Methoxyphenol) (9mg) and platinum-containing catalyst (Pt / C) (5% on carbon, 0.6g) Place it in a 250mL double-necked bottle; install a reflux tube and a serum plug on the 250mL double-necked bottle, vacuumize and then fill it with nitrogen three times, then take the solvent: anhydrous toluene (Toluene) (60mL) and inject it with a glass syringe The solvent was injected into a 250mL double-necked bottle. Then tetrakis(dimethylsiloxy)silane (6g, 18.25mmol) was taken and injected into a 250mL two-necked bottle with a syringe. Put a 250mL double-necked bottle in an oil bath and heat it to 85-90°C for reaction. After 23 hours, collect the liquid by suction and filtration (4-6 times), and then carry out gravity filtration for the collected liquid .

[0080] The organ...

Embodiment 2

[0093] Cross-shaped siloxane polymers (n=8, m=50) and straight-chain siloxanes (n=32, m=200) containing polymerizable functional groups and hydrophilic groups synthesized by the present invention and American The small molecule cross-shaped siloxane disclosed in the patent announcement number US4463149 is used to make silicone hydrogel lenses, and its formula is shown in the following table:

[0094]

[0095]

[0096] TRIS: Tris-[tris(trimethylsiloxy)]propyl methacrylate silane (3-[Tris(trimethylsiloxy)silyl]propyl methacrylate)

[0097] NVP: N-Vinylpyrrolidone (N-Vinyl-2-pyrrolidone)

[0098] HEMA: 2-hydroxyethyl methacrylate (Hydroxyethyl Methacrylate)

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Abstract

The invention provides a cross siloxane macromolecule containing a polymerizable functional group and hydrophilic group and a preparation process thereof. The preparation process includes: firstly providing cross siloxane with a silicon hydrogen group at the end, then carrying out first hydrosilation reaction to synthesize a cross siloxane micromolecule containing a polymerizable functional group, then carrying out ring-opening polymerization reaction to synthesize a cross polysiloxane macromolecule containing a silicon hydrogen group, and finally carrying out second hydrosilation reaction to synthesize the cross siloxane macromolecule containing the polymerizable functional group and hydrophilic group.

Description

technical field [0001] The invention relates to a siloxane macromolecule and its preparation process, especially to a cross-shaped siloxane macromolecule containing a polymerizable functional group and a hydrophilic group and its preparation process. Background technique [0002] Because silicone hydrogel has good oxygen permeability, wettability and biocompatibility, it is widely used in the production of contact lenses. The silicon monomers used in the production of contact lenses can be divided into straight-chain silicone Alkane and cruciform siloxanes, such as Taiwan Patent Publication No. TWI434865, disclose a straight-chain polysiloxane with hydrophilic side chains such as amide functional groups or phosphorylcholine functional groups, or such as U.S. Patent In the announcement No. US4463149, a small molecule cruciform siloxane structure is disclosed. [0003] Although linear siloxane can be modified to make it more hydrophilic, but the linear siloxane has a one-dime...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/20C08G77/12G02C7/04G02B1/04
Inventor 许千树吴忠宪刘懿娴
Owner YUNG SHENG OPTICAL