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Preparation method of high-durability hydrophilic coating

A hydrophilic coating and durability technology, which is applied in the field of preparation of high-durability hydrophilic coatings, can solve the problems of accelerating the migration of small molecule additives, affecting the performance of device materials, and poor controllability of the production process. Effects of production and risk control, improved flexibility, improved abrasion resistance and flexibility

Inactive Publication Date: 2021-12-14
浙江海圣医疗器械股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thermal curing process is simple, basically only needs leaching and drying, but the disadvantages are also obvious, such as longer reaction time; high temperature affects the performance of device materials and accelerates the migration of small molecule additives; thermal curing makes the production process less controllable , leading to poor coating stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In the reaction vessel, add 100g of epoxidized soybean oil, heat to 80°C, gradually add the mixture of acrylic acid, N,N-dimethylaniline, and hydroquinone prepared in proportion, control the dropping rate, and heat up to 100°C , After stirring and reacting for 5h, the epoxy soybean oil acrylate prepolymer was obtained. The mass ratio of epoxidized soybean oil and acrylic acid is 1:3; N,N-dimethylaniline is 0.5% of the mass of epoxidized soybean oil, and hydroquinone is 0.05% of the mass of epoxidized soybean oil.

[0030] Add 1,6-hexamethylene diisocyanate, hydroxyethyl methacrylate and antioxidant into the reaction vessel, raise the temperature to 50°C, stir and react for 3 hours to obtain an intermediate product; raise the temperature to 60°C; then add dilauric acid di Butyl tin and polytetrahydrofuran diol were reacted for 10 hours to obtain a polyurethane acrylate prepolymer. The amount ratio of 1,6-hexamethylene diisocyanate, hydroxyethyl methacrylate, and polytet...

Embodiment 2

[0034] In the reaction vessel, add 100g of epoxidized soybean oil, heat to 80°C, gradually add the mixture of acrylic acid, N,N-dimethylaniline, and hydroquinone prepared in proportion, control the dropping rate, and heat up to 100°C , After stirring and reacting for 5h, the epoxy soybean oil acrylate prepolymer was obtained. The ratio of epoxidized soybean oil to acrylic acid is 1:3; N,N-dimethylaniline is 1% of the mass of epoxidized soybean oil, and hydroquinone is 0.5% of the mass of epoxidized soybean oil.

[0035] Add 1,6-hexamethylene diisocyanate, hydroxyethyl methacrylate and antioxidant into the reaction vessel, raise the temperature to 45°C, stir and react for 3 hours to obtain an intermediate product; raise the temperature to 70°C; then add dilauric acid di Butyl tin and polytetrahydrofuran diol were reacted for 10 hours to obtain a polyurethane acrylate prepolymer. The amount ratio of 1,6-hexamethylene diisocyanate, hydroxyethyl methacrylate, and polytetrahydrofu...

Embodiment 3

[0039] In the reaction vessel, add 100g epoxidized soybean oil, heat to 80°C, gradually add the mixture of acrylic acid, triethylamine, and hydroquinone prepared in proportion, control the dropping rate, raise the temperature to 100°C, and stir for 5 hours. , to obtain epoxy soybean oil acrylate prepolymer. The mass ratio of epoxidized soybean oil and acrylic acid is 1:3; triethylamine is 0.5% of the mass of epoxidized soybean oil, and hydroquinone is 0.5% of the mass of epoxidized soybean oil.

[0040] Add 4,4'-diphenylmethane diisocyanate, hydroxyethyl methacrylate and antioxidant into the reaction vessel, raise the temperature to 60°C, stir and react for 3 hours to obtain an intermediate product; raise the temperature to 80°C; then add dilauric acid Dibutyltin and polytetrahydrofuran diol were reacted for 12 hours to obtain a polyurethane acrylate prepolymer. The amount ratio of 4,4'-diphenylmethane diisocyanate, hydroxyethyl methacrylate, and polytetrahydrofuran diol is 1...

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Abstract

The invention belongs to the technical field of high polymer materials, and particularly relates to a high-durability hydrophilic coating and a preparation method thereof. The high-durability hydrophilic coating is a double-coating system, a photocuring process is adopted, photocuring resin in a bottom coating adopts epoxidized soybean oil acrylate, photocuring resin in a surface coating adopts urethane acrylate, and the two coatings are firmly combined into a complete composite coating through chemical bonds and intermolecular force, so that the whole coating not only has a hydrophilic lubricating function, but also has reliable firmness. The preparation method of the high-durability hydrophilic coating comprises the following steps of treating the surface of an instrument, preparing the bottom coating, preparing the surface coating, preparing the hydrophilic coating, and post-treating the hydrophilic coating.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method of a highly durable hydrophilic coating. Background technique [0002] Interventional diagnosis and treatment technology is a general term for a series of technologies that introduce specific instruments such as puncture needles, catheters, and guide wires into the human body through natural channels or tiny wounds for minimally invasive treatment. Compared with traditional medical technology, interventional diagnosis and treatment has the advantages of less trauma, less treatment risk, and lower treatment cost, and has been widely promoted and used clinically. At present, most interventional devices are made of hydrophobic materials, such as polyvinyl chloride, polyurethane and silicone rubber. Although they have excellent mechanical properties and biocompatibility, their hydrophobicity is too strong, and when they intervene in the hum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L31/10A61L31/08A61L31/14C08G18/67C08G18/48
CPCA61L31/10A61L31/08A61L31/14C08G18/672C08G18/4854A61L2400/18A61L2420/02A61L2420/06A61L2420/08C08L75/14C08L91/00C08L71/02C08L39/06C08G18/48
Inventor 聂智军裘雅红黄海生王利明
Owner 浙江海圣医疗器械股份有限公司
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