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A kind of coating of interpenetrating network structure hydrophilic coating and its preparation and application method

An interpenetrating network structure and hydrophilic coating technology, which is applied in the coating field of the interpenetrating network structure hydrophilic coating, can solve the problems of toxicity of isocyanate compounds, insufficient coating firmness, and lack of adhesion of conduits, and achieve excellent The effect of wear resistance, high mechanical strength and excellent friction resistance

Active Publication Date: 2018-02-16
BEIJING DEMAX MEDICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this system, the substrate is not connected with other components by chemical reaction, so the coating firmness is still insufficient
In addition, isocyanate compounds are toxic and pose a safety hazard to health
[0016] It can be seen that, compared with the non-reactive hydrophilic polymer, the reactive hydrophilic polymer has better coating firmness, but the other components matched with it in the coating are not tightly connected to each other. And the lack of sufficient adhesion to the catheter, the coating still has the problem of insufficient wear resistance, so new technical means are needed to obtain higher performance coatings to meet the higher requirements of interventional devices

Method used

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  • A kind of coating of interpenetrating network structure hydrophilic coating and its preparation and application method

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Effect test

Embodiment 1

[0045] Preparation of side carboxyl group-containing polyurethane (CPU): use solvent method to synthesize side carboxyl group-containing polyurethane, add polyether or polyester diol and diisocyanate into the reactor, heat up to 70°C, stir for 1 hour to obtain prepolymer, Add 2,2-dimethylol propionic acid and 1,4-butanediol, react for 2 hours, add N,N-dimethylformamide, continue the reaction for 1 hour, add dibutyltin dilaurate, and then Reacted for 8 hours, down to room temperature, the solution in the reactor was poured into a container with deionized water, a white precipitate was precipitated, collected the precipitate and washed 3 times with deionized water, placed in a vacuum drying oven, at 90 After vacuum drying at ℃ for 48 hours, a transparent block product was obtained, which was granulated to obtain a side carboxyl group-containing polyurethane masterbatch.

[0046] Wherein, described polyether or polyester diol is selected from polyoxypropylene diol (PPG), polytetr...

Embodiment 2

[0052] Water-based polyurethane, trimethylolpropane-tris[3-(2-methylaziridinyl)]propionate, and deionized water were added to the container, and stirred at room temperature for 30 minutes to obtain a primer, in which three The quality of methylolpropane-tris[3-(2-methylaziridinyl)]propionate is 1% of the waterborne polyurethane quality, and the quality of deionized water is 80% of the total quality of the primer. Polyurethane CPU-1 containing side carboxyl groups, polymethyl vinyl ether-maleic anhydride, acrylic acid, hydroxyethyl acrylate, trimethylolpropane triacrylate, azobisisobutyronitrile, N,N-dimethyl Add formamide to the container and stir at room temperature for 30 minutes to obtain a top coat, wherein the mass ratio of CPU-1 to polymethylvinyl ether-maleic anhydride is 1:0.1, and the mass of acrylic acid is polymethylvinyl Ether - 2% by mass of maleic anhydride, mass of hydroxyethyl acrylate - 5% by mass of polymethyl vinyl ether - maleic anhydride, mass of trimethyl...

Embodiment 3

[0057] Water-based polyurethane, trimethylolpropane-tris(3-aziridinyl)propionate, and deionized water were added to the container, and stirred at room temperature for 30 minutes to obtain a primer, wherein trimethylolpropane-tris(3-aziridinyl)propionate The quality of (3-aziridinyl) propionate is 2% of the waterborne polyurethane quality, and the quality of deionized water is 83% of the total quality of the primer. Add side carboxyl group-containing polyurethane CPU-2, polymethyl vinyl ether-maleic anhydride, acrylic acid, hydroxyethyl acrylate, pentaerythritol triacrylate, benzoyl peroxide, N,N-dimethylacetamide to the container , stirred at room temperature for 30 minutes to obtain a top coat, wherein the mass ratio of CPU-2 to polymethylvinyl ether-maleic anhydride was 1:0.5, and the mass of acrylic acid was polymethylvinyl ether-maleic anhydride 1% of the quality, the quality of hydroxyethyl acrylate is 5% of the quality of polymethyl vinyl ether-maleic anhydride, and the ...

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Abstract

The invention relates to a coating of an interpenetrating network structure hydrophilic coating and a method for preparing and using the coating. The coating includes a primer and a top coating. The primer contains water-based polyurethane, multifunctional aziridine derivatives and deionized water. The top coating The coating contains pendant carboxyl polyurethane, polymethyl vinyl ether-maleic anhydride, acrylic acid, hydroxyethyl acrylate, multifunctional acrylate derivatives, free radical initiators and organic solvents, and the components form cross-linked interconnections during curing. Through the network structure, the coating has excellent hydrophilic lubricity and wear resistance, and is suitable for hydrophilic lubrication treatment of interventional devices in the field of endovascular interventional diagnosis and treatment technology.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a coating for a hydrophilic coating with an interpenetrating network structure and a preparation and application method thereof. Background technique [0002] Intravascular interventional diagnosis and treatment technology is widely used in clinical angiography, angioplasty, removal of intravascular thrombus or foreign body, etc. Compared with traditional medical technology, it is not only convenient to operate, but also reduces the pain of patients due to the low trauma of interventional treatment , the risk of treatment is small, and the cost of treatment is relatively low, so this technology has been widely promoted and used in the medical field. Intravascular interventional diagnosis and treatment technology is to use interventional catheters to reach distant diseased parts in the body through the vascular lumen, such as coronary arteries and other vascular parts, and then inje...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D175/08C09D175/06C08G18/10C08G18/32C08G18/34B05D5/04B05D7/24A61L29/08
Inventor 王兴元戴华英
Owner BEIJING DEMAX MEDICAL TECH
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