A kind of UV-curable hydrophilic coating and preparation method thereof

Abstract

The invention discloses a UV-curable hydrophilic coating, which is composed of a primer and a top paint. The primer includes the following components, and the formula ratio is calculated by weight percentage: 2-77 parts of bonding resin, dispersant 0.1 to 1.0 parts, 0.1 to 1.5 parts of antioxidant, 0.1 to 5.0 parts of photoinitiator, 14.5 to 97.3 parts of solvent; the top coating includes the following components, and the formula ratio is by weight percentage: 1 to 15 parts of hydrophilic resin , 0.5-2.5 parts of water-based cross-linking agent, 0.1-5.0 parts of photoinitiator, 0.1-1.0 part of dispersant, 0.1-0.5 part of antioxidant, 79-98.8 parts of solvent; the beneficial effect of the present invention is that the bottom layer of the present invention and The preparation process of the top layer solution is simple, and the materials in the formula are mixed in an ice bath or at room temperature to obtain a hydrophilic coating solution; the bottom layer solution of the present invention is applicable to a wide range of substrates, including silica gel, polyvinyl chloride, stainless steel, polyurethane, poly ester, etc.; the hydrophilic coating of the present invention has low friction and high firmness, and after 30 repeated frictions, the friction does not increase and the coefficient of friction does not decrease.

Description

technical field [0001] The invention relates to the technical field of medical coatings, in particular to an ultraviolet curable hydrophilic coating and a preparation method thereof. Background technique [0002] With the continuous development of medical technology, more and more catheters are used for minimally invasive surgery. Commonly used materials for catheters, such as silica gel, polyvinyl chloride, stainless steel, polyurethane, polyester, etc., have high surface friction and are likely to cause damage to blood vessels and cavities. Complications such as infection and infection, through hydrophilic modification of the catheter, while maintaining the original physical properties of the catheter, the friction coefficient of the catheter surface is reduced, the lubricity of the surface is improved, and the safety during use is improved. . [0003] Regarding the modification of the hydrophilic coating on the surface of the catheter, a number of patents have been repor...

AI Technical Summary

Problems solved by technology

Patent CN103289499A discloses a hydrophilic resin containing photoactive groups in the polymer chain and a hydrophilic coating prepared by containing a photoactive crosslinking agent. This method requires the synthesis of a special resin, and the preparation process is cumbersome

Patent CN103933616A discloses a method for modifying the top coating, but the cured coating contains acidic groups and needs to be neutralized with ammonia water, and the operation process is cumbersome

Patent CN106540336A discloses a hydrophilic modification coating on the surface of medical interventional catheters. This method is suitable for polyurethane, polyvinyl chloride, polyester, etc., but it is easy to fall off when applied to silica gel substrates.