Medical hydrophilic lubrication coating of water system and preparation method thereof
A technology for lubricating coatings and water systems, applied to coatings, conduits, etc., can solve problems such as harming workers' health, polluting the environment, and complicated processes, and achieve the effects of reducing safety hazards, protecting the environment, and simplifying the preparation steps
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[0027] Example 1
[0028] Bottom coating preparation: weigh 20g of water-based polyurethane resin (produced by DSM, 40% solid content), 0.1g of sodium lauryl sulfate, 1g of carboxymethyl cellulose, 20g of deionized water, mix well, Leave it to degas for 24 hours and then stand by; obtain the bottom layer coating mixture.
[0029] Lubricant coating preparation: weigh 5g of polyvinylpyrrolidone, 5g of water-based polyurethane resin (solid content 40%), 0.1g of sodium lauryl sulfate, 40g of deionized water, mix well, let stand for 24 hours to defoam to obtain the surface mixture Liquid stand-by.
[0030] Immerse the PVC catheter in ethanol, clean it ultrasonically at 40KHz for 10 minutes, remove the dirt on the surface, and dry; then immerse it in the primer coating mixture for 10 seconds, take it out and bake at 70°C for 8 minutes until it is dry; use scanning electron microscope The thickness of the underlying coating was detected to be 3 microns. Then put it into the surface layer...
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[0032] Example 2
[0033] Bottom coating preparation: weigh 20g of water-based polyacrylic resin (produced by DSM, solid content 40%), trisodium phosphate 0.15, carboxymethyl cellulose 1.5g, deionized water 30g, mix well, and let stand for 24 hours Standby after deaeration;
[0034] Lubricant coating preparation: weigh 6g polyvinylpyrrolidone, 6g polyacrylic resin (produced by DSM, solid content 40%), 0.15 trisodium phosphate, 50g deionized water, mix well, let stand for 24 hours to degas, wait use.
[0035] Immerse the latex catheter in ethanol, clean it ultrasonically at 45KHz for 7 minutes, remove the dirt on the surface, and dry; then immerse it in the primer coating mixture for 10 seconds, take it out and bake it at 75°C for 20 minutes to dryness; use scanning electron microscope The thickness of the underlying coating was detected to be 1 micron. Then put it into the surface layer mixture to soak for 10 seconds, take it out and bake it at 80°C for 50 minutes; the thickness o...
Example Embodiment
[0036] Example 3
[0037] Bottom coating preparation: weigh 20 g of water-based bisphenol A epoxy resin (produced by DSM, 40% solid content), 0.15 g of polyoxyethylene alkyl ester, 1.5 g of carboxymethyl cellulose, and 30 g of deionized water , Mix well, let stand for 24 hours after deaeration;
[0038] Lubricant coating preparation: weigh polyvinylpyrrolidone 6g, water-based polyurethane resin (produced by DSM, solid content 40%) 2.5g, water-based polyacrylic resin (produced by DSM, solid content 40%) 1g, polyoxygen Ethylene alkyl ester 0.15g, deionized water 50g, mix well, let stand for 24 hours to defoam, set aside.
[0039] Dip the silicone tube into ethanol, clean it ultrasonically at 50KHz for 5min, remove the dirt on the surface, and dry it; then immerse it in the primer coating mixture for 10 seconds, take it out and bake it at 90℃ for 3min to dryness, and measure by scanning electron microscope The thickness of the primer layer is 5 microns. Then put it into the surface l...
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