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Surface modification method and surface modified elastomer

A surface modification, thermoplastic elastomer technology, applied in vehicle parts, tire parts, transportation and packaging, etc., can solve the problems of non-sterilization, poor sliding performance of sealing gaskets, pain of patients, etc., and achieve economical and beneficial effects

Active Publication Date: 2018-04-06
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, a sliding improver such as silicone oil is applied to the sliding surface, but silicone oil has been pointed out that it may have a bad effect on the recently marketed biological agents
On the other hand, since the seal gasket without the slidability improving agent is poor in slidability, the plunger cannot be depressed smoothly during drug administration, causing vibration, causing incorrect injection volume, and causing pain to the patient, etc.
[0003] In order to meet such contradictory requirements for sealing performance and sliding performance, a technology of coating a PTFE film with self-lubricating properties has been proposed (refer to Patent Document 2). limit
In addition, when products coated with PTFE film are applied to applications requiring durability such as repeated sliding, reliability may not be stable
Furthermore, since PTFE is not resistant to radiation, there is a problem that it cannot be sterilized by irradiation

Method used

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  • Surface modification method and surface modified elastomer
  • Surface modification method and surface modified elastomer
  • Surface modification method and surface modified elastomer

Examples

Experimental program
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Effect test

Embodiment 1）

[0182] Use triazine to crosslink chloroprene rubber containing isoprene units (unsaturation: 1~2%) to obtain vulcanized rubber sealing gaskets (cured at 180°C for 10 minutes), and soak the vulcanized rubber sealing gaskets in benzophenone In the 3wt% acetone solution, the surface of vulcanized rubber adsorbed benzophenone, and dried. Next, the surface of the vulcanized rubber gasket was irradiated with LED-UV light having a wavelength of 365 nm for 10 minutes to chemically bond benzophenone, and the surface was washed with acetone to remove unreacted benzophenone. Then, take out the vulcanized rubber and dry it.

[0183] Soak the dried vulcanized rubber sealing gasket into a glass reaction vessel with an aqueous acrylic acid solution (2.5M: 18g of acrylic acid dissolved in 100mL of water), and irradiate it with LED-UV light with a wavelength of 365nm for 1 hour to perform free radical polymerization. Growth of non-functional polymer chains on the rubber surface. Then, wash t...

Embodiment 2）

[0186] Use 2-methacryloyloxyethyl phosphorylcholine instead of 3-perfluorohexyl-2-hydroxypropyl acrylate to make the polymerization time 10 hours. In addition, it is the same as in Example 1 to obtain surface modification Elastomers (laminated polymer brushes).

Embodiment 3）

[0188] Use triazine to crosslink chloroprene rubber containing isoprene units (unsaturation: 1~2%) to obtain vulcanized rubber sealing gaskets (cured at 180°C for 10 minutes), and soak the vulcanized rubber sealing gaskets in benzophenone In the 3wt% acetone solution, the surface of vulcanized rubber adsorbed benzophenone, and dried. Next, the surface of the vulcanized rubber gasket was irradiated with LED-UV light having a wavelength of 365 nm for 10 minutes to chemically bond benzophenone, and the surface was washed with acetone to remove unreacted benzophenone. Then, take out the vulcanized rubber and dry it.

[0189] Soak the dried vulcanized rubber sealing gasket into a glass reaction vessel with an aqueous acrylic acid solution (2.5M: 18g of acrylic acid dissolved in 100mL of water), and irradiate with LED-UV light with a wavelength of 365nm for 1 hour to perform free radical polymerization , to grow non-functional polymer chains on the rubber surface. Then, wash the s...

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Abstract

An object of the present invention is to provide a method for modifying the surface of vulcanized rubber or thermoplastic elastomer, which can economically and advantageously impart various functions such as slidability and biocompatibility according to the application. The present invention relates to a surface modification method using vulcanized rubber or thermoplastic elastomer as a modification object, comprising the steps of forming a polymerization initiation point on the surface of the modification object, and using the polymerization initiation point as The starting point is step 2 of growing non-functional polymer chains by radically polymerizing non-functional monomers, and further, growing functional polymer chains by radically polymerizing functional monomers.

Description

technical field [0001] The present invention relates to a method for surface modification, and a surface-modified elastomer for a gasket for a syringe having at least a part of the modified surface obtained by the modification method, a tire having at least a part of the tire groove surface, and the like. Background technique [0002] The part that maintains a sealed state and slides, such as the gasket of the syringe, is integrated with the plunger of the syringe, and seals the plunger and the barrel of the syringe. It attaches importance to sealing, and uses elastic bodies such as rubber, but there are some problems with sliding ( Refer to Patent Document 1). Therefore, a slip modifier such as silicone oil is applied to the sliding surface, but it has been pointed out that silicone oil may have a bad influence on recently marketed biological agents. On the other hand, since the gasket without the slidability improving agent is poor in slidability, the plunger cannot be de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/18B60C1/00
Inventor 皆川康久
Owner SUMITOMO RUBBER IND LTD
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