Hydrophilic coating, preparation method and method for testing firmness of coating

A technology of hydrophilic coating and hydrophilic polymer, which is applied in the preparation method and the test of the firmness of the coating. In the field of hydrophilic coating, it can solve the problem of insufficient firmness of the hydrophilic coating and the inability to maintain lubricity. Test method Incomplete and other problems, to achieve ideal effect, good lubricity, lubricity and wear resistance ideal effect

Inactive Publication Date: 2021-09-07
LEPU MEDICAL TECH (BEIJING) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Therefore, on the one hand, the technical problem to be solved in the present invention is to overcome defects such as insufficient firmness of the hydrophilic coating in the prior art, failure to maintain good lubricity after repeated friction, thereby providing a hydrophilic coating, preparation method
[0009] On the other hand, the technical problem to be solved in the present invention is to overcome the incomplete defect of the test method of the firmness of the hydrophilic coating in the prior art, thereby providing a test method of the firmness of the hydrophilic coating

Method used

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  • Hydrophilic coating, preparation method and method for testing firmness of coating

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Embodiment 1

[0043] The present embodiment provides a kind of preparation method of hydrophilic coating, concrete steps are as follows:

[0044] In step 1, the catheter with an inner diameter of 1.7 mm and an outer diameter of 2.0 mm to be coated is subjected to plasma treatment, and the treatment gas is oxygen, and the treatment time is 5 minutes.

[0045] Step 2, prepare the hydrophilic coating solution according to the following ratio, including 100 g of the total mass of the hydrophilic coating solution, 10 g of polyacrylic acid acrylamide (molecular weight 4 million-5 million), DSM polyurethane emulsion NeoRez E-122 10g, CX-3000.3g, the balance is water.

[0046] In step 3, the hydrophilic coating solution is applied to the surface of the catheter by dipping, the rising and falling speeds are both 1mm / s, and the soaking time is 20s. Allow to dry for 1 hour after coating.

[0047] In step 4, heat and cure in an oven, and cure at 70° C. for 1 hour to obtain a hydrophilic coating with ...

Embodiment 2

[0049] The present embodiment provides a kind of preparation method of hydrophilic coating, concrete steps are as follows:

[0050] In step 1, the pipe with an inner diameter of 1.7mm and an outer diameter of 2.0mm made of Pebax7233 is subjected to plasma treatment, the treatment gas is oxygen, and the treatment time is 5 minutes.

[0051] Step 2, prepare the hydrophilic coating solution according to the following ratio, including 100 g of the total mass of the hydrophilic coating solution, 10 g of polyacrylic acid acrylamide (molecular weight 4 million-5 million), DSM polyurethane emulsion NeoRez E-122 10g, CX-3000.3g, the balance is water.

[0052] Step 3: Apply the hydrophilic coating solution to the surface of the catheter by dipping, the ascent and descent speeds are 1mm / s, the soaking time is 20s, and dry for 1 hour after the coating is completed.

[0053] In step 4, heat and cure in an oven, and cure at 70° C. for 1 hour to obtain a hydrophilic coating with a thickness o...

Embodiment 3

[0055] The present embodiment provides a kind of preparation method of hydrophilic coating, concrete steps are as follows:

[0056] Embodiment 3 is a variation of Embodiment 1, in order to achieve better lubricating performance and surface adhesion. Adjust the ratio of two kinds of polyacrylic acid acrylamide and acrylic acid modified polyurethane solution, apply in two steps, and then cure.

[0057] In step 1, the catheter with an inner diameter of 1.7 mm and an outer diameter of 2.0 mm to be coated is subjected to plasma treatment, and the treatment gas is oxygen, and the treatment time is 5 minutes.

[0058] In step 2, the hydrophilic coating solution is prepared according to the following proportions, and the proportions are mass ratios. The ratios of the two coats were different, with the first coat having a higher proportion of adhesion resin and the second coat of a higher proportion of hydrophilic polymer. In order to make the final lubricity and wear resistance of t...

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Abstract

The invention belongs to the technical field of medical biological coatings, and particularly relates to a hydrophilic coating, a preparation method and a method for testing the firmness of the coating. The coating comprises the following raw materials in percentage by mass: 5-20% of a hydrophilic polymer; 5-12% of adhesive force resin; 0.1%-2% of a cross-linking agent; and the balance solvent, wherein the mass average molecular weight of the hydrophilic polymer is 3 to 6 million. Through cooperation of all the components, the prepared hydrophilic coating has good surface lubricating performance and base material adhesive force, puncture resistance of instruments can be reduced, stimulation to human tissue and mucosa is reduced, pain of patients is reduced, and meanwhile particle impurities introduced into human body fluid are reduced.

Description

technical field [0001] The invention belongs to the technical field of medical biological coatings, and in particular relates to a hydrophilic coating, a preparation method and a testing method for the firmness of the coating. Background technique [0002] At present, various medical polymer materials have been widely used in the field of interventional surgery, such as cardiac intervention, respiratory intervention, urology intervention, hematology intervention, orthopedic intervention, vascular intervention, imaging intervention, etc. With the development of interventional diagnosis and treatment technology, the clinical demand for various interventional devices is also increasing. According to incomplete statistics, there are more than 120 kinds of catheters used in urology in the world, and there are more than 100 kinds of catheters used in the diagnosis and treatment of cardiovascular, cerebrovascular, tumor and other diseases. These interventional instruments all need...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/02C09D175/14G01N19/04B05D7/24B05D7/02B05D5/00B05D3/14
CPCC09D133/02C09D175/14G01N19/04B05D7/24B05D7/02B05D5/00B05D3/144C08L75/14C08L33/02
Inventor 胡博文李超刘小建张昱昕
Owner LEPU MEDICAL TECH (BEIJING) CO LTD
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