WO2001021691A1 - A surface-modified silicone rubber by ion assisted reaction and its method for modifying the surface - Google Patents

A surface-modified silicone rubber by ion assisted reaction and its method for modifying the surface Download PDF

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Publication number
WO2001021691A1
WO2001021691A1 PCT/KR2000/000661 KR0000661W WO0121691A1 WO 2001021691 A1 WO2001021691 A1 WO 2001021691A1 KR 0000661 W KR0000661 W KR 0000661W WO 0121691 A1 WO0121691 A1 WO 0121691A1
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Prior art keywords
silicone rubber
ion
assisted reaction
treated
reactive gas
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PCT/KR2000/000661
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French (fr)
Inventor
Byeong-Yeon Choi
Seok-Keun Koh
Ki-Hwan Kim
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Korea Institute Of Science And Technology
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Application filed by Korea Institute Of Science And Technology filed Critical Korea Institute Of Science And Technology
Priority to JP2001525261A priority Critical patent/JP2003510389A/en
Priority to AU55750/00A priority patent/AU5575000A/en
Publication of WO2001021691A1 publication Critical patent/WO2001021691A1/en

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/12—Chemical modification
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
    • B29C71/04—After-treatment of articles without altering their shape; Apparatus therefor by wave energy or particle radiation, e.g. for curing or vulcanising preformed articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2083/00—Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as moulding material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2383/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
    • C08J2383/04—Polysiloxanes

Definitions

  • the present invention relates to a surface-modified silicone rubber by an ion-assisted reaction, and a surface-modifying method thereof in which the surface of silicone rubber is activated by an ion beam and the activated polymer surface of the silicone rubber is reacted with environmental gas to thereby create a new chemical state.
  • silicone rubber has a superior cold resistance and a heat resistance, contributing to a favorable oxygen permeability to those of general rubber. Silicone rubber is also resistant to ultraviolet rays as well as having excellent heat conductivity, fire retardancy, electric insulating property and elasticity. Silicone rubber is also chemically stable, has a high chemical resistance to oil, fusion material and drug and an excellent resistance to acid and alkali. With this advantages, the silicone rubber is widely used in the industries as a substitute for natural rubber.
  • silicone rubber has hydrophobicity, it is restricted in its application. Thus, due to the hydrophilicity, silicone rubber needs to be subject to a surface modification to increase its application to a wide range.
  • an object of the present invention is to provide surface- modified silicone rubber by an ion-assisted reaction and a method for modifying the surface of silicone rubber to improve surface hydrophilic characteristics of the silicone rubber, so that adhesion force between the silicone rubber and other material can be more highly increased thanks to the improved hydrophilic characteristics while holding its own merits.
  • silicone rubber that is surface-treated by an ion-assisted reaction in a manner that ions accelerated by applying energy are irradiated and reactive gas is injected thereto, thereby improving its hydrophilicity and adhesive force.
  • a method for modifying the surface of silicone rubber by an ion-assisted reaction in which silicone rubber or rubber fabricated by mixing silicone rubber with other material is provided to which ions accelerated by applying energy, while maintaining a vacuum state, are irradiated on the surface of silicone rubber and a reactive gas is injected to the surface of the silicone rubber, so that the surface of the silicone rubber is modified to have a hydrophilicity and increase an adhesion force.
  • Figure 1 is a schematic sectional view of ion-assisted reaction apparatus for modifying the surface of silicone rubber by ion-assisted reaction in accordance with the present invention.
  • Figure 2 is a graph showing variation of contact angle of water to silicone rubber which has been subject to surface treatment by ion-assisted reaction as a function of ion dose in accordance the present invention
  • Figure 3A is a photograph showing a state that sticking agent is coated on the surface-treated silicone rubber by ion-assisted reaction in accordance with the present invention
  • Figure 3B is a photograph showing a state that sticking agent is coated on general silicone rubber
  • Figure 4 is a photograph of a golf club taken as an example as a metal by coating the surface-treated silicone rubber by ion-assisted reaction of the present invention with an adhesive agent;
  • Figure 5 is a photograph of a table-tennis racket fabricated with silicone rubber, substituting for latex rubber, taken as an example for an existing polymer product manufactured by coating an adhesive agent on the surface-treated silicone rubber by ion-assisted reaction of the present invention.
  • a hydrophilic functional group is formed on the surface of silicone rubber which generally has a characteristic of hydrophobicity to allow an adhesive force on the surface, so that the rubber can be applied to a metal thin film deposition and coating material adhesion.
  • the ion beam energy of the present invention having an energy in the range from hundreds of eV to thousands of eV, is able to control only the surface characteristic by forming the functional group on the surface of the silicone rubber without changing the physical structure of the silicone rubber by injecting a reactive gas.
  • the hydrophilicity of the surface-modified silicone rubber can be improved without changing the inherent property of the silicone rubber.
  • having the energy of 0.5 ⁇ 5.0keV, ion makes a part of bond of carbon of silicone polymer to be reacted with reactive environmental gas to generate hydrophilic functional group such as double bond between carbon and the environmental gas, so that only the surface of silicone rubber can be changed to have hydrophile.
  • the amount of the ion irradiated in the present invention is suitable in the range of 10 13 ⁇ 10 18 depending on the characteristics of products.
  • FIG. 1 is a schematic sectional view of ion-assisted reaction apparatus for modifying the surface of silicone rubber by ion-assisted reaction in accordance with the present invention.
  • the ion-assisted reaction apparatus roughly includes a vacuum chamber 1 , reactive gas inlet 2 inside the vacuum chamber 1 and an ion source 3 having an ionizing unit for ionizing a gas and an accelerating unit for accelerating the ionized particle to extract ion beam.
  • An outlet 1a is installed at one side of the vacuum chamber 1.
  • a substrate holder 2a is installed inside the chamber 1 to fix a material 4 to be surface- treated.
  • the accelerated ions generated from the ion source 3 pass a shutter 3a to reach the material 4 to be surface-treated.
  • argon is selected as an ion, for which, however, various materials such as hydrogen, oxygen or nitrogen can be used as an ion without being limited to argon.
  • Figure 2 is a graph showing variation of contact angle of water to silicone rubber which has been subject to surface treatment by ion-assisted reaction as a function of ion dose, obtained by an experiment to observe the surface of the silicone rubber.
  • Discharge voltage 400 ⁇ 500 V
  • Surface modifying material silicone rubber
  • the reduction of the contact angle between the surface-modified silicone rubber by the ion-assisted reaction and water means improvement of hydrophilicity of the surface of the silicone rubber which has been ion- treated.
  • Such improvement in the hydrophilic characteristics is made in a manner that hydrophilic functional group is formed on the polymer surface by the ion-assisted reaction.
  • the surface-modified silicone rubber by the ion-assisted reaction method has improved wetting characteristics and the wetting characteristics is controllable.
  • the hydrophilic characteristics are increased in a manner that the combination of the surface of silicone rubber is partially broken by the ion beam to activate the surface and the activated surface is reacted with an environmental reactive gas.
  • silicone rubber is made a sheet to be cut by pieces or in a roll form and classified by thickness, width, length and colors, to which the surface-modifying method is adopted, so that the resulted silicone rubber can be metal-plated or coated with an adhesion paste or an sicking agent, to which a parting sheet is attached to fabricate products.
  • Figure 3A is a photograph showing a state that adhesion paste is coated on the surface-modified silicone rubber by the ion-assisted reaction
  • Figure 3B is a photograph showing a state that adhesion paste is coated on a general silicone rubber.
  • the product made by applying the adhesion paste to the surface-modified silicone rubber by the ion-assisted reaction has the favorable adhesive force between the coated adhesion paste and the silicone rubber.
  • the adhesion paste coated on the general silicone rubber has a bad adhesive force, resulting in that the adhesion paste is partially detached from the silicone rubber, so that it is not possible to use for products.
  • Another example of application of the surface-modified silicone rubber by the ion-assisted reaction is a golf club.
  • Figure 4 is a photograph of a golf club taken as an exemplary product made by attaching the surface-modified silicone rubber by ion-assisted reaction of the present invention onto the golf club.
  • the adhesion is not made, or even in case of using any existing special adhesion material, the adhesive force is not good, making it impossible to apply it to the golf club.
  • the silicone rubber has the favorable adhesive force, so that it can be applied to products
  • Figure 5 is a photograph of a table-tennis racket fabricated by attaching the surface-modified silicone rubber by the ion-assisted reaction onto the racket
  • Table-tennis rackets are typically made by the natural latex rubber, which does not possibly change the physical property of rubber Comparatively, in case of using the silicone rubber, it is advantageous in that various artificial change can be applied to the wettability, the repulsive elasticity and the strength of rubber and the wetting friction strength on the surface of the racket can be heightened, so that stronger and more diverse rotatary force, attack force and elasticity can be applied to the table-tennis ball during an actual game
  • the surface-modified silicone rubber by the ton- assisted reaction has the remarkably excellent hydrophilic characteristics which is maintained for a long time
  • Application of the surface-modified silicone rubber by the ion-assisted reaction to commercial products is made in a manner that an adhesion paste or an adhesive agent is coated on the silicone rubber, a metal thin film is deposited or a coating material is attached on the silicone rubber to allow an adhesive force to the silicone rubber, or the silicone rubber is metal-plated or colored.
  • the moisture content of the surface of the silicone rubber can be heightened with the low contact angle, the adhesion paste, the adhesive agent and the metal-plating material are stably deposited. That is, by modifying only the surface of the silicone rubber, the inherent characteristics of polymer and the surface-modified characteristics of the surface of the silicone rubber can be all utilized so as to be applied to diverse fields.
  • the surface hydrophilic characteristics of the silicone rubber is considerably improved, so that it is possible to metal-plate or color the surface of the silicone rubber, coat an adhesion paste or an sticking agent thereon.
  • the surface-modified silicone rubber by the ion-assisted reaction extends the restricted application coverage of the existing silicone rubber and is able to create its new application fields.
  • the surface-modified silicone rubber of the present invention can be applied to the fields of various industries, architecture, sports equipment, electricity, electronic equipment, shoes, clothes and other specific fields which has failed to use the silicone rubber due to its characteristics of incapability of attachment.
  • the intrinsic characteristics of the silicone rubber such as the excellent elasticity, acid resistance, heat resistance, alkali resistance, air permeability and inorganic property, are utilized as it is, so that the silicone rubber can be easily attached, cohered, colored or metal-plated at a specific part or various products requiring such characteristics. Therefore, the surface-modified silicone rubber by the ion-assisted reaction can be extendedly applied to other fields as well as solving the shortcomings of the currently used silicone rubber products, signifying that it satisfies those two kinds of demands.

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  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

A silicone rubber of which surface is treated by an ion assisted reaction and its method for surface treatment are disclosed. A silicone rubber that are surface-treated by an ion assisted reaction in a manner that an ion accelerated by applying energy is radiated, to which reactive gas is injected for surface treatment, thereby improving its hydrophile and adhesive force. In addition, a method for treating a surface of a silicone rubber by ion assisted reaction is also disclosed in which a silicone rubber or a rubber fabricated by mixing a silicone rubber with other material is provided to which an ion accelerated by applying energy, while maintaining a vacuum state, is radiated on the surface of the silicone rubber and a reactive gas is injected to the periphery of the surface of the silicone rubber is modified to have a hydrophile and an adhesive force. In the present invention, the surface of the silicone rubber so that the surface of the silicone rubber is modified to improve the surface hydrophilic characteristics of the silicone rubber, so that the cohesion and adhesive force of the silicone rubber can be more highly increased owing to the improved hydrophilic characteristics while holding its own merits, and thusly treated silicone rubber can be applied to various products.

Description

A SURFACE-MODIFIED SILICONE RUBBER BY ION ASSISTED REACTION AND ITS METHOD FOR MODIFYING THE SUFFACE
TECHNICAL FIELD The present invention relates to a surface-modified silicone rubber by an ion-assisted reaction, and a surface-modifying method thereof in which the surface of silicone rubber is activated by an ion beam and the activated polymer surface of the silicone rubber is reacted with environmental gas to thereby create a new chemical state.
BACKGROUND ART Recently, with the development of updated technology, a new material is being actively developed. Such a new material needs to have a chemically excellent stability, and there are restrictions depending on a characteristic of its surface.
In case of a hydrophilic polymer, since it is not stable with an organic solvent, its fabrication is of no significance, and actually, it is difficult to fabricate it. Thus, polymer compounds are mostly fabricated by hydrophobic polymer. Researches are being conducted to attempt to change the surface characteristics of the compounds, physically or chemically. Under this circumstances, silicone rubber has a superior cold resistance and a heat resistance, contributing to a favorable oxygen permeability to those of general rubber. Silicone rubber is also resistant to ultraviolet rays as well as having excellent heat conductivity, fire retardancy, electric insulating property and elasticity. Silicone rubber is also chemically stable, has a high chemical resistance to oil, fusion material and drug and an excellent resistance to acid and alkali. With this advantages, the silicone rubber is widely used in the industries as a substitute for natural rubber.
However, since silicone rubber has hydrophobicity, it is restricted in its application. Thus, due to the hydrophilicity, silicone rubber needs to be subject to a surface modification to increase its application to a wide range.
TECHNICAL GIST OF THE PESENT INVENTION Therefore, an object of the present invention is to provide surface- modified silicone rubber by an ion-assisted reaction and a method for modifying the surface of silicone rubber to improve surface hydrophilic characteristics of the silicone rubber, so that adhesion force between the silicone rubber and other material can be more highly increased thanks to the improved hydrophilic characteristics while holding its own merits.
In order to achieve the above object, there is provided silicone rubber that is surface-treated by an ion-assisted reaction in a manner that ions accelerated by applying energy are irradiated and reactive gas is injected thereto, thereby improving its hydrophilicity and adhesive force.
In order to achieve the above object, there is also provided a method for modifying the surface of silicone rubber by an ion-assisted reaction in which silicone rubber or rubber fabricated by mixing silicone rubber with other material is provided to which ions accelerated by applying energy, while maintaining a vacuum state, are irradiated on the surface of silicone rubber and a reactive gas is injected to the surface of the silicone rubber, so that the surface of the silicone rubber is modified to have a hydrophilicity and increase an adhesion force.
BRIEF DESCRIPTION OF THE DRAWINGS
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.
In the drawings:
Figure 1 is a schematic sectional view of ion-assisted reaction apparatus for modifying the surface of silicone rubber by ion-assisted reaction in accordance with the present invention.
Figure 2 is a graph showing variation of contact angle of water to silicone rubber which has been subject to surface treatment by ion-assisted reaction as a function of ion dose in accordance the present invention;
Figure 3A is a photograph showing a state that sticking agent is coated on the surface-treated silicone rubber by ion-assisted reaction in accordance with the present invention;
Figure 3B is a photograph showing a state that sticking agent is coated on general silicone rubber;
Figure 4 is a photograph of a golf club taken as an example as a metal by coating the surface-treated silicone rubber by ion-assisted reaction of the present invention with an adhesive agent; and
Figure 5 is a photograph of a table-tennis racket fabricated with silicone rubber, substituting for latex rubber, taken as an example for an existing polymer product manufactured by coating an adhesive agent on the surface-treated silicone rubber by ion-assisted reaction of the present invention.
DETAILED DESCRIPTION OF THE INVENTION Surface-modified silicone rubber by ion-assisted reaction method has an excellent wetting characteristic, making it possible to extend its application to diverse fields of silicone rubber material, which is restricted in its application due to the lack of hydrophilicity.
That is, a hydrophilic functional group is formed on the surface of silicone rubber which generally has a characteristic of hydrophobicity to allow an adhesive force on the surface, so that the rubber can be applied to a metal thin film deposition and coating material adhesion.
The ion beam energy of the present invention, having an energy in the range from hundreds of eV to thousands of eV, is able to control only the surface characteristic by forming the functional group on the surface of the silicone rubber without changing the physical structure of the silicone rubber by injecting a reactive gas.
That is, the hydrophilicity of the surface-modified silicone rubber can be improved without changing the inherent property of the silicone rubber. In detail, having the energy of 0.5~5.0keV, ion makes a part of bond of carbon of silicone polymer to be reacted with reactive environmental gas to generate hydrophilic functional group such as double bond between carbon and the environmental gas, so that only the surface of silicone rubber can be changed to have hydrophile.
The amount of the ion irradiated in the present invention is suitable in the range of 1013~1018 depending on the characteristics of products.
In case of silicone rubber of which surface has been changed to have hydrophile, it is possible to coat adhesion paste or adhesive agent, coat a coating material or deposit a metal thin film, which can be thus used for adhesive tape of silicone rubber, metal-plated silicone rubber or other silicone rubber products.
The embodiment of the present invention will now be described in detail with reference to the accompanying drawings. It is to be understood that these examples are merely illustrative and it is not intended to limit the scope of the present invention to these examples and all changes and modifications that fall within the meets and bounds of the claims, or equivalence of such meets and bounds are therefore intended to be embraced by the appended claims. Figure 1 is a schematic sectional view of ion-assisted reaction apparatus for modifying the surface of silicone rubber by ion-assisted reaction in accordance with the present invention.
As shown in the drawing, the ion-assisted reaction apparatus roughly includes a vacuum chamber 1 , reactive gas inlet 2 inside the vacuum chamber 1 and an ion source 3 having an ionizing unit for ionizing a gas and an accelerating unit for accelerating the ionized particle to extract ion beam. An outlet 1a is installed at one side of the vacuum chamber 1. A substrate holder 2a is installed inside the chamber 1 to fix a material 4 to be surface- treated. The accelerated ions generated from the ion source 3 pass a shutter 3a to reach the material 4 to be surface-treated. With reference to Figure 1 , argon is selected as an ion, for which, however, various materials such as hydrogen, oxygen or nitrogen can be used as an ion without being limited to argon. Figure 2 is a graph showing variation of contact angle of water to silicone rubber which has been subject to surface treatment by ion-assisted reaction as a function of ion dose, obtained by an experiment to observe the surface of the silicone rubber.
Conditions for the experiment are as follows: Used ion species: Argon
Reactive gas : Oxygen
Vacuum level in experiment : 1 x 10"6 Torr
Accelerating voltage : 1000 eV
Discharge voltage : 400 ~ 500 V Surface modifying material : silicone rubber
Ion dose : 5 x 1014 - 1 x 1017 ions/cm2
From the result that the surface of silicone rubber is modified by the ion-assisted reaction, it is noted that the contact angle between the silicone
rubber which was not treated by the ion-assisted reaction and water is 120°. In case that the flowing amount of oxygen used as a reactive gas is 2 seem and the surface of silicone rubber is treated by argon ion with ion dose of 1 x 1017, the contact angle is reduced from 120° to 8° through the surface
treatment by the ion-assisted reaction. The reduction of the contact angle between the surface-modified silicone rubber by the ion-assisted reaction and water means improvement of hydrophilicity of the surface of the silicone rubber which has been ion- treated.
Such improvement in the hydrophilic characteristics is made in a manner that hydrophilic functional group is formed on the polymer surface by the ion-assisted reaction.
The surface-modified silicone rubber by the ion-assisted reaction method has improved wetting characteristics and the wetting characteristics is controllable. The hydrophilic characteristics are increased in a manner that the combination of the surface of silicone rubber is partially broken by the ion beam to activate the surface and the activated surface is reacted with an environmental reactive gas.
In this manner, the surface hydrophilic characteristics of silicone rubber was remarkably improved, so that the surface of silicone rubber can be metal- plated, colored or coated with an adhesion paste or an adhesive agent.
Accordingly, silicone rubber is made a sheet to be cut by pieces or in a roll form and classified by thickness, width, length and colors, to which the surface-modifying method is adopted, so that the resulted silicone rubber can be metal-plated or coated with an adhesion paste or an sicking agent, to which a parting sheet is attached to fabricate products.
Figure 3A is a photograph showing a state that adhesion paste is coated on the surface-modified silicone rubber by the ion-assisted reaction, and Figure 3B is a photograph showing a state that adhesion paste is coated on a general silicone rubber.
As shown in Figure 3A, it is noted that the product made by applying the adhesion paste to the surface-modified silicone rubber by the ion-assisted reaction has the favorable adhesive force between the coated adhesion paste and the silicone rubber.
Unlike the adhesion paste evenly coated with a good adhesive force on the surface-modified silicone rubber by the ion-assisted reaction, the adhesion paste coated on the general silicone rubber, as shown in Figure 3B, has a bad adhesive force, resulting in that the adhesion paste is partially detached from the silicone rubber, so that it is not possible to use for products.
Another example of application of the surface-modified silicone rubber by the ion-assisted reaction is a golf club.
Figure 4 is a photograph of a golf club taken as an exemplary product made by attaching the surface-modified silicone rubber by ion-assisted reaction of the present invention onto the golf club.
Currently, in case of the general silicone rubber products, the adhesion is not made, or even in case of using any existing special adhesion material, the adhesive force is not good, making it impossible to apply it to the golf club. To the contrary, in case of the surface-modified silicone rubber by the ion-assisted reaction, when the adhesive agent is coated, the silicone rubber has the favorable adhesive force, so that it can be applied to products
Figure 5 is a photograph of a table-tennis racket fabricated by attaching the surface-modified silicone rubber by the ion-assisted reaction onto the racket
Table-tennis rackets are typically made by the natural latex rubber, which does not possibly change the physical property of rubber Comparatively, in case of using the silicone rubber, it is advantageous in that various artificial change can be applied to the wettability, the repulsive elasticity and the strength of rubber and the wetting friction strength on the surface of the racket can be heightened, so that stronger and more diverse rotatary force, attack force and elasticity can be applied to the table-tennis ball during an actual game
INDUSTRIAL APPLICABILITY
As so far described, the surface-modified silicone rubber by the ton- assisted reaction has the remarkably excellent hydrophilic characteristics which is maintained for a long time Application of the surface-modified silicone rubber by the ion-assisted reaction to commercial products is made in a manner that an adhesion paste or an adhesive agent is coated on the silicone rubber, a metal thin film is deposited or a coating material is attached on the silicone rubber to allow an adhesive force to the silicone rubber, or the silicone rubber is metal-plated or colored.
Especially, since the moisture content of the surface of the silicone rubber can be heightened with the low contact angle, the adhesion paste, the adhesive agent and the metal-plating material are stably deposited. That is, by modifying only the surface of the silicone rubber, the inherent characteristics of polymer and the surface-modified characteristics of the surface of the silicone rubber can be all utilized so as to be applied to diverse fields.
According to the present invention, the surface hydrophilic characteristics of the silicone rubber is considerably improved, so that it is possible to metal-plate or color the surface of the silicone rubber, coat an adhesion paste or an sticking agent thereon.
Since the surface-modified silicone rubber by the ion-assisted reaction extends the restricted application coverage of the existing silicone rubber and is able to create its new application fields. Thus, the surface-modified silicone rubber of the present invention can be applied to the fields of various industries, architecture, sports equipment, electricity, electronic equipment, shoes, clothes and other specific fields which has failed to use the silicone rubber due to its characteristics of incapability of attachment. In addition, since the intrinsic characteristics of the silicone rubber, such as the excellent elasticity, acid resistance, heat resistance, alkali resistance, air permeability and inorganic property, are utilized as it is, so that the silicone rubber can be easily attached, cohered, colored or metal-plated at a specific part or various products requiring such characteristics. Therefore, the surface-modified silicone rubber by the ion-assisted reaction can be extendedly applied to other fields as well as solving the shortcomings of the currently used silicone rubber products, signifying that it satisfies those two kinds of demands.

Claims

1. Silicone rubber that is surface-treated by an ion-assisted reaction in a manner that ions accelerated by applying energy are radiated and reactive gas is injected thereto, thereby improving its hydrophilicity and adhesion force.
2. The silicone rubber according to claim 1 , wherein the ions are one or more than two of argon, hydrogen, oxygen, nitrogen.
3. The silicone rubber according to claim 1 , wherein the reactive gas is oxygen.
4. The silicone rubber according to claim 1 , wherein the contact angle
between the surface-treated silicone rubber and water is 80° ~10°.
5. A method for modifying the surface of silicone rubber by an ion- assisted reaction in which silicone rubber or rubber fabricated by mixing silicone rubber with other material is provided to which ions accelerated by applying energy, while maintaining a vacuum state, are irradiated on the surface of silicone rubber and a reactive gas is injected to the surface of the silicone rubber, so that the surface of the silicone rubber is modified to have a hydrophile and an adhesive force.
6. The method according to claim 5, wherein the energy of the ion is 0.5 ~ 5.0 keV.
7. The method according to claim 5, wherein the irradiation amount of the ion is 10 3 ~1018 ions/cm2.
8. The silicone rubber according to claim 5, wherein the ions are one or more than two of argon, hydrogen, oxygen, nitrogen.
9. The silicone rubber according to claim 5, wherein the reactive gas is oxygen.
10. The silicone rubber according to claim 5, wherein the contact angle
between the surface-treated silicone rubber and water is 80° ~10°.
PCT/KR2000/000661 1999-09-20 2000-06-23 A surface-modified silicone rubber by ion assisted reaction and its method for modifying the surface WO2001021691A1 (en)

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JP2001525261A JP2003510389A (en) 1999-09-20 2000-06-23 Silicone rubber surface modified by ion-assisted reaction and surface modification method
AU55750/00A AU5575000A (en) 1999-09-20 2000-06-23 A surface-modified silicone rubber by ion assisted reaction and its method for modifying the surface

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KR1999/40418 1999-09-20

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KR20040026733A (en) * 2002-09-25 2004-04-01 주식회사 피앤아이 Method and Apparatus for Formation of Thick Layer on the Surface Modified Substrate
JP6808979B2 (en) * 2016-06-01 2021-01-06 株式会社リコー Input element and input device
KR20240044990A (en) 2022-09-29 2024-04-05 주식회사 럭키산업 surface modification method of mouthpiece type toothbrush

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