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Surface Modification Method And Surface-Modified Elastic Body

A surface modification, thermoplastic elastomer technology, used in pharmaceutical formulations, catheters, coatings, etc., can solve problems such as reduced lubricity

Inactive Publication Date: 2017-03-08
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention solves the above-mentioned problems, and its purpose is not to provide a resin coating that has problems such as peeling off, curling, etc. during the movement of the tube, and to provide a resin coating that is chemically immobilized and excellent in lubricity and durability. Surface modification method of vulcanized rubber or thermoplastic elastomer that lubricates the surface and is excellent in productivity and economy

Method used

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  • Surface Modification Method And Surface-Modified Elastic Body
  • Surface Modification Method And Surface-Modified Elastic Body
  • Surface Modification Method And Surface-Modified Elastic Body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] A 3 wt% acetone solution of benzophenone was applied to the surface of a tubular thermoplastic elastomer made of nylon 12, and the benzophenone was adsorbed and dried. Then, soak in the glass reaction container that has added 2-(methacryloyloxy)ethyltrimethylammonium chloride aqueous solution (1.25M), cover with a rubber cover, introduce argon gas and bubble for 120 minutes, force Oxygen out. While rotating the glass reaction vessel, irradiate LED light with a wavelength of 365 nm (5 mW / cm 2 ) for 180 minutes, carry out free radical polymerization, so that the polymer chain grows on the surface of the nylon tube to obtain a surface-modified elastomer (polymer brush).

Embodiment 2

[0103] Soak the surface of a tubular thermoplastic elastomer made of nylon 12 in an aqueous solution (1.25M) of 2-(methacryloyloxy)ethyltrimethylammonium chloride added and adjusted to a concentration of 0.1% by mass of benzophenone In a glass reaction vessel, cover it with a rubber lid, introduce argon gas and bubble it for 120 minutes to force out oxygen. While rotating the glass reaction vessel, irradiate LED light with a wavelength of 365 nm (5 mW / cm 2 ) for 180 minutes, carry out free radical polymerization, so that the polymer chain grows on the surface of the nylon tube to obtain a surface-modified elastomer (polymer brush).

Embodiment 3

[0105] A 3 wt% acetone solution of benzophenone was applied to the surface of a tubular thermoplastic elastomer made of nylon 12, and the benzophenone was adsorbed and dried.

[0106] Then, soak in the glass reaction container that has added 2-(methacryloyloxy)ethyltrimethylammonium chloride aqueous solution (1.25M), cover with a rubber cover, introduce argon gas and bubble for 120 minutes, force Oxygen out. While rotating the glass reaction vessel, irradiate LED light with a wavelength of 365 nm (5 mW / cm 2 ) for 120 minutes, carry out free radical polymerization, so that the polymer chain grows on the surface of the nylon tube to obtain a surface-modified elastomer (polymer brush).

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Abstract

Methods are provided for surface-modifying a rubber vulcanizate or a thermoplastic elastomer. The methods allow these objects to have a lubricating surface layer chemically fixed thereon and thus exhibit excellent lubricity and excellent lubricant durability, instead of having a resin coating which has drawbacks such as reduction in lubricity due to e.g. separation or peeling of the coating during movement within a vessel or tract. Further, the methods have good productivity and good economic efficiency. Included is a method for surface-modifying an object made of a rubber vulcanizate or a thermoplastic elastomer, the method including: step 1 of forming polymerization initiation points on a surface of the object; and step 2 of radically polymerizing a monomer starting from the initiation points by irradiation with UV of 300-400 nm to grow polymer chains on the surface so that a modification layer of 70-1200 nm thickness is formed on the surface.

Description

technical field [0001] The present invention relates to a method of surface modification having lubricity when wet, and a surface-modified elastomer such as medical devices and catheters having at least a part of the modified surface obtained by the surface modification method. Background technique [0002] Vascular catheters and urethral catheters used in the medical field, etc., are inserted into blood vessels, digestive tracts, trachea, bile ducts, and urinary catheters in aqueous solutions such as blood and body fluids, so they need to be inserted smoothly without damaging tissues. insert. [0003] Therefore, a low-friction lubricant is coated on the surface of the catheter to cover the lubricating layer and used (see Patent Documents 1 to 3), but it has such a problem that the lubricity is not sufficient. In addition, the surface of the catheter is not chemically fixed. Lubricity decreases due to peeling, curling, etc. while moving inside the tube. [0004] prior art ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/18A61L31/10A61L31/16C08L77/02C08L75/04C08J7/04
CPCA61L31/10A61L31/16C08J7/18C08J2377/02C08J2375/04C08L77/02C08L75/04A61L27/34A61L29/042A61L29/06A61L29/085A61L29/14A61L31/14A61L2400/10A61L2420/02C08J7/04C08L33/10C08L77/00A61L29/041A61L29/16A61L2300/452A61M25/0045A61M2025/0046C08J2333/14C09D133/14
Inventor 皆川康久
Owner SUMITOMO RUBBER IND LTD