JP2007313059A - Cleaning bar - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cleaning bar which attains a dust removal action by adhering of dust utilizing the viscosity of a crosslinkable fluororubber composition molded article and solvent washing reproduction use by property of the mold article excellent in solvent resistance and chemical resistance. <P>SOLUTION: The cleaning bar uses the crosslinkable fluororubber composition molded article (perfluoropolyether-based fluororubber) for an elastic viscotic member for removing dust from the plane and the uneven part of a matter to be cleaned. Consequently, the perfluoropolyether-based fluororubber excellent in solvent resistance is made to be viscotic dust removing layer, so that reproduction use is easy. Moreover, low molecule components are not shifted, so that the cleaning bar can be used in a wide field requiring cleaning such as an electric/electronic field, and it is valuable industrially. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention has good solvent resistance, chemical resistance, heat resistance, and low temperature characteristics, and is effective for dust removal on flat surfaces and uneven portions using perfluoropolyether-based fluororubber having adhesive properties for dust removal portions. It relates to a cleaning bar.

  The conventional cleaning bar that uses the adhesiveness of rubber uses the adhesiveness of a synthetic rubber such as butyl rubber or NBR to which a tackifier is added, or low hardness silicone rubber, liquid silicone rubber, or urethane rubber. It was intended to remove dust.

  In this case, when a large amount of dust adheres during use, it is necessary to transfer it to an adhesive sheet having adhesive strength stronger than that of the cleaning bar, or to regenerate it by washing the cleaning bar with a solvent.

  When transferring dust to the pressure-sensitive adhesive sheet, the tackifier of the pressure-sensitive adhesive sheet adheres to the cleaning bar, and further, the tackifier is transferred to the object to be cleaned, and the application is limited.

  In the case of cleaning with a solvent, the conventional rubber material has insufficient solvent resistance, and easily deteriorates into polar solvents such as ketones, lower alcohols, carbonyls, and organic acids that have excellent cleaning characteristics. It has the disadvantage of being inferior in durability.

  For synthetic rubber-based cleaning bars such as urethane rubber that has deteriorated due to solvents, there is a transition of the composition, and it may be transferred to the object to be cleaned when dust is removed, so the application is limited End up. In addition, for silicone rubber-based cleaning bars, low-molecular siloxane generated from silicone rubber may be transferred during the dust removal process, and siloxane troubles are caused by the low-molecular siloxane transferred to the object to be cleaned when dust is removed. Will occur and the application will be limited.

  The present invention has been made in view of the above circumstances, and has a dust removal effect due to dust adhesion utilizing the adhesiveness of a crosslinkable fluororubber composition molded product (perfluoropolyether-based fluororubber) and solvent resistance of the molded product. Another object of the present invention is to provide a cleaning bar that can be reused by solvent cleaning due to its excellent chemical resistance.

  As a result of intensive investigations to achieve the above object, the present inventors have found that an ideal effect can be obtained by using a cleaning bar structure having a perfluoropolyether-based fluorine-containing rubber as a dust removing portion, It came to make this invention.

［式中、Ｘは−ＣＨ₂−、−ＣＨ₂Ｏ−、−ＣＨ₂ＯＣＨ₂−又は−Ｙ−ＮＲ−ＣＯ−（Ｙは−ＣＨ₂−又は下記構造式（Ｚ）

（ｏ，ｍ又はｐ位）で示される基）
で表される基、Ｒは水素原子、メチル基、フェニル基又はアリル基、Ｘ’は−ＣＨ₂−、−ＯＣＨ₂−、−ＣＨ₂ＯＣＨ₂−又は−ＣＯ−ＮＲ−Ｙ’−（Ｙ’は−ＣＨ₂−又は下記構造式（Ｚ’）

（ｏ，ｍ又はｐ位）で示される基）
で表される基であり、Ｒは上記と同じである。ａは独立に０又は１、Ｌは２〜６の整数、ｂ及びｃはそれぞれ０〜２００の整数である。］
で表される直鎖状フルオロポリエーテル化合物であることを特徴とする［４］記載のクリーニングバー。
［６］上記バー本体が、金属、ガラス、セラミックス、プラスチックのいずれか一つからなることを特徴とする［２］乃至［５］のいずれか１項記載のクリーニングバー。 That is, the present invention provides the following cleaning bar.
[1] A cleaning bar characterized in that perfluoropolyether-based fluorine-containing rubber is used as an elastic adhesive member for removing dust on the flat surface and uneven portions of an object to be cleaned.
[2] The cleaning bar according to [1], wherein the perfluoropolyether-based fluorine-containing rubber is adhered to one end or both ends of the bar main body.
[3] The crosslinking site of the crosslinkable fluororubber composition for obtaining the perfluoropolyether-based fluororubber is Si—CH═CH ₂ , and the crosslinking system is addition reaction crosslinking or peroxide crosslinking. The cleaning bar according to [1] or [2].
[4] The perfluoropolyether-based fluorine-containing rubber is
(A) a perfluoro compound having at least two alkenyl groups in the molecule and having a divalent perfluoroalkylene structure or a divalent perfluoropolyether structure in the main chain;
(B) Crosslinkability comprising a reinforcing filler, and (C) a crosslinking agent having a hydrosilyl group in the molecule or a peroxide crosslinking agent in an amount sufficient to cure the component (A). The cleaning bar according to any one of [1] to [3], which is obtained by curing a fluororubber composition.
[5] The component (A) is represented by the following general formula (1)

[Wherein, X is _{-CH 2 -, - CH 2 O} -, - CH 2 OCH 2 - or -Y-NR-CO- (Y is -CH ₂ - or the following structural formula (Z)

(Group represented by o, m or p position)
R is a hydrogen atom, methyl group, phenyl group or allyl group, X ′ is —CH ₂ —, —OCH ₂ —, —CH ₂ OCH ₂ — or —CO—NR—Y ′ — (Y 'Is -CH ₂ -or the following structural formula (Z')

(Group represented by o, m or p position)
R is the same as above. a is independently 0 or 1, L is an integer of 2 to 6, and b and c are integers of 0 to 200, respectively. ]
The cleaning bar according to [4], which is a linear fluoropolyether compound represented by the formula:
[6] The cleaning bar according to any one of [2] to [5], wherein the bar body is made of any one of metal, glass, ceramics, and plastic.

  The cleaning bar of the present invention can be easily recycled by using a perfluoropolyether-based fluororubber having excellent solvent resistance as an adhesive dust-removing layer, and there is no migration of low-molecular components. It can be used in a wide range of fields requiring cleanliness, and its industrial utility value is great.

The perfluoropolyether-based fluororubber according to the present invention is preferably obtained by curing a crosslinkable perfluoropolyether-based fluororubber composition. In this case, the crosslinking site of this fluororubber composition is It is preferable that Si—CH═CH ₂ and the crosslinking system be addition reaction crosslinking or peroxide crosslinking.

As such a perfluoropolyether fluororubber composition in which the crosslinking site used in the present invention is Si—CH═CH ₂ , Japanese Patent No. 2990646, Japanese Patent Application Laid-Open No. 2000-007835, Japanese Patent Application Laid-Open No. 2001-2001 are disclosed. 106893, JP2003-201401, and the like, which are generally available as trade name SIFEL series (Shin-Etsu Chemical Co., Ltd.).

The crosslinkable perfluoropolyether-based fluororubber composition will be described in detail.
(A) a perfluoro compound having at least two alkenyl groups in the molecule and having a divalent perfluoroalkylene structure or a divalent perfluoropolyether structure in the main chain;
(B) A reinforcing filler, and (C) an addition-reactive crosslinking agent having a hydrosilyl group in the molecule or a peroxide crosslinking agent in an amount sufficient to cure the component (A). is there.

［式中、Ｘは−ＣＨ₂−、−ＣＨ₂Ｏ−、−ＣＨ₂ＯＣＨ₂−又は−Ｙ−ＮＲ−ＣＯ−（Ｙは−ＣＨ₂−又は下記構造式（Ｚ）

（ｏ，ｍ又はｐ位）で示される基）
で表される基、Ｒは水素原子、メチル基、フェニル基又はアリル基、Ｘ’は−ＣＨ₂−、−ＯＣＨ₂−、−ＣＨ₂ＯＣＨ₂−又は−ＣＯ−ＮＲ−Ｙ’−（Ｙ’は−ＣＨ₂−又は下記構造式（Ｚ’）

（ｏ，ｍ又はｐ位）で示される基）
で表される基であり、Ｒは上記と同じである。ａは独立に０又は１、Ｌは２〜６の整数、ｂ及びｃはそれぞれ０〜２００の整数である。］
で表される直鎖状フルオロポリエーテル化合物であるものが好ましい。 Of particular importance is the polymer of the component (A), and the component (A) is represented by the following general formula (1)

[Wherein, X is _{-CH 2 -, - CH 2 O} -, - CH 2 OCH 2 - or -Y-NR-CO- (Y is -CH ₂ - or the following structural formula (Z)

(Group represented by o, m or p position)
R is a hydrogen atom, methyl group, phenyl group or allyl group, X ′ is —CH ₂ —, —OCH ₂ —, —CH ₂ OCH ₂ — or —CO—NR—Y ′ — (Y 'Is -CH ₂ -or the following structural formula (Z')

(Group represented by o, m or p position)
R is the same as above. a is independently 0 or 1, L is an integer of 2 to 6, and b and c are integers of 0 to 200, respectively. ]
What is a linear fluoropolyether compound represented by these is preferable.

The reinforcing filler of component (B) is important because it is a component related to durability in the regeneration process after the dust adheres.
Examples of the filler include fumed silica, wet silica, pulverized silica, calcium carbonate, diatomaceous earth, carbon black, various metal oxide powders, and the like, and those treated with various surface treatment agents. Good. Among these, fumed silica is particularly preferable from the viewpoint of improving mechanical strength, and further, fumed silica treated with a silane-based surface treatment agent is preferable from the viewpoint of improving dispersibility.

  (B) As an addition amount of the reinforcing filler of a component, 1-200 mass parts is preferable with respect to 100 mass parts of (A) component. In particular, 5 to 100 parts by mass is preferable from the viewpoint of stability of mechanical properties.

  Component (C) is a crosslinking agent that cures the polymer of component (A), and can be broadly classified into (1) an addition-reactive crosslinking agent having a hydrosilyl group in the molecule or (2) a peroxide crosslinking agent.

  When the addition reaction is performed using a crosslinking agent capable of addition reaction of component (C), an organosilicon compound having at least two hydrogen atoms (SiH groups) bonded to a silicon atom in one molecule is required. From the viewpoint of compatibility with the component A), dispersibility, and uniformity after curing, those having one or more fluorine-containing groups in one molecule are preferable.

  Furthermore, when performing addition reaction crosslinking, a catalyst that promotes the addition reaction between the alkenyl group and the hydrosilyl group in component (A) is required. This hydrosilylation reaction catalyst is generally a noble metal compound and is expensive. For this reason, platinum or platinum compounds that are relatively easily available are often used.

  When an organic peroxide is used as the component (C), the organic peroxide can be used without any particular limitation as it is usually used for curing a peroxide curable rubber composition. Specifically, for example, benzoyl peroxide, bis (2,4-dichlorobenzoyl) peroxide, di-t-butyl peroxide, 2,5-dimethyl-di-t-butylperoxyhexane, t-butyl peroxide Examples include benzoate, t-butyl peroxyisopropyl carbonate, and dicumyl peroxide. These may be used alone or in combination of two or more.

  Component (C) may be added in an amount sufficient to cure the polymer of component (A). Usually, in the case of addition crosslinking, the molar ratio of hydrosilyl group / alkenyl group is 0.5 to 2.0. More preferably, it is 0.8-1.5. Moreover, it is preferable that the usage-amount of the said hydrosilylation reaction catalyst is 0.1-1,000 ppm in conversion of a platinum group metal with respect to (A) component. When using an organic peroxide, 0.01-5 mass parts with respect to 100 mass parts of polymers of (A) component, Preferably 0.05-3 mass parts is mix | blended.

  The above-mentioned fluorine-containing rubber composition has two types of composition, a liquid rubber composition and a millable rubber composition, both of which include a reinforcing filler, particularly silica powder, as a molded product applied to the present invention. Have the same tackiness and regeneration properties.

Next, the cleaning bar of the present invention obtained using the rubber material as an adhesive member will be described with reference to the drawings. The perfluoropolyether-based fluororubber molded product 1 is placed on the cleaning bar main body (bar) 2 to be cleaned. It is attached as an elastic adhesive member for removing dust on flat surfaces and uneven portions. In this case, the fluororubber molded product 1 is preferably a cap-like form that is detachably attached or fixed to one or both ends of the bar body 2. 1 and 2 are examples in which a cap-shaped perfluoropolyether-based fluororubber molded product 1 is attached to one end of the bar body 2 as an adhesive member. FIGS. This is an example in which a cap-shaped perfluoropolyether fluororubber molded product 1 is attached.
Thus, the end of the bar body 2 may be a perfluoropolyether fluororubber, and the same dust removal effect can be obtained regardless of the shape.
The bar body 2 may be made of any material that can be processed into a cylindrical shape. Specifically, various metals, ceramics, inorganic materials such as glass, various heat-resistant plastics, and the like may be mentioned. In order to improve adhesion to rubber. Primers can be used in combination.

  The cleaning bar of the present invention can be used for various applications. That is, manufacturing processes such as electronic parts that dislike dust, specifically printed boards, flexible boards, and various displays including liquid crystals, inspection processes, dust removal in repair, screen printing, offset printing, tampo printing, etc. It can be used for a wide range of applications, such as dust removal in the field, and applications that require cleanliness, particularly dust removal adhering to irregularities.

  EXAMPLES Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated concretely, this invention is not restrict | limited to the following Example.

Rubber material, primer and bar body used in examples and comparative examples (perfluoropolyether fluororubber composition)
Fluorine-containing rubber composition (I): SIFEL 3400 (A / B) (manufactured by Shin-Etsu Chemical Co., Ltd., liquid two-component composition standard formulation): addition reaction crosslinking, (I) crosslinking site Si—CH═CH ₂
Fluorine-containing rubber composition (II): SIFEL 3155 (manufactured by Shin-Etsu Chemical Co., Ltd., liquid one-component composition standard formulation): addition reaction crosslinking, (II) crosslinking site Si—CH═CH ₂
Fluorine-containing rubber composition primer: Primer SF-1 (manufactured by Shin-Etsu Chemical Co., Ltd.)
(Silicone rubber composition)
Silicone rubber composition (I): KE1950-30 (A / B) (manufactured by Shin-Etsu Chemical Co., Ltd., standard composition of liquid two-component composition)
Silicone rubber composition (II): KE941 (manufactured by Shin-Etsu Chemical Co., Ltd.)
・ Organic peroxide crosslinking agent for silicone rubber: C-23 (manufactured by Shin-Etsu Chemical Co., Ltd.)
・ Silicone rubber primer: Primer C (manufactured by Shin-Etsu Chemical Co., Ltd.)
-Primer for silicone rubber: Primer No. 23T (manufactured by Shin-Etsu Chemical Co., Ltd.)
(Bar body)
・ Aluminum rod with 2mm outer diameter and 100mm length (hardening device)
・ High temperature oven

[Example 1]
In order to obtain a molded article having the structure shown in FIG.
After applying primer SF-1 to the end of the unheated bar body, a small amount (0.05 to 0.08 g) of SIFEL 3400 (A / B) was deposited, and then the material was deposited in an oven heated to 200 ° C. Heated and cured for 10 minutes with the part hung down, and further adhered material on the resulting cured product, left standing until the part was upright and left until the shape was stable, and again In an oven heated to 200 ° C., the material was attached with the material attached to the bottom, and was heated and cured for 10 minutes to obtain the cleaning bar of the present invention.

[Example 2]
As in Example 1, a small amount (0.05 to 0.08 g) of SIFEL 3155 was attached to the end of the unheated bar main body, and then suspended in an oven heated to 200 ° C. so that the material attaching part was down. In the state, heat cure for 10 minutes, further adhere the material on the resulting cured product, leave the part upright and let it stand until the shape stabilizes, and again in an oven heated to 200 ° C Then, it was heated and cured for 10 minutes in a state where it was suspended so that the portion to which the material was adhered was, so that the cleaning bar of the present invention was obtained.

[Comparative Example 1]
After applying primer C to the end of the unheated bar body, a small amount (0.05 to 0.08 g) of silicone rubber composition: KE1950-30 (A / B) was adhered, and then heated to 200 ° C. Heat-cured for 10 minutes in a state where the material adhering part is suspended in the oven, further adheres the material on the resulting cured product, and the shape is stable with the part facing up Then, it was heated and cured for 10 minutes in an oven heated to 200 ° C. again with the material-attached portion suspended so that a cleaning bar was obtained.

[Comparative Example 2]
Primer No. is attached to the end of the bar body which is not heated. After applying 23T, a substantially uniform mixture of silicone rubber composition diluted with toluene: 100 parts by weight of KE941 and organic peroxide cross-linking agent: 2 parts by weight of C-23 was deposited and then heated to 200 ° C. Air-dried for 20 minutes with the material adhering part hung in the oven, and then heat-cured for 10 minutes. The material was further adhered onto the obtained cured product, and the portion was set to face upward. It was air-dried until the shape became stable in the state, and was again heat-cured for 10 minutes in a state where it was suspended in an oven heated to 200 ° C. so that the part to which the material adhered was down, to obtain a cleaning bar.

[Dust removal evaluation method]
The clean condition when the object to be cleaned having a flat surface and uneven portions left in the room and having uneven portions removed with a cleaning bar was observed with a 50 × microscope was evaluated.
○: There is a sufficient dust removing effect.
X: Although there is some removal effect, it is difficult to remove fine dust.

[Reproduction durability evaluation method]
It was immersed for 10 minutes in isopropyl alcohol in an ultrasonic cleaning device, and after removing the adhering dust, the stability of the rubber material when dried for 10 minutes was confirmed.
○: There is no swelling or deformation, and it can be reused immediately.
X: It swells and deforms and is difficult to recycle.

  Moreover, the rubber physical property of the rubber | gum cured material obtained by the said Example and comparative example was measured based on JISK6249. The results are summarized in Table 1.

  From these results, it can be seen that the cleaning bar according to the present invention having a structure using a perfluoropolyether-based fluorine-containing rubber as an adhesive member is excellent in dust removal performance and excellent in reproduction durability with a solvent. On the other hand, as shown in the comparative example, it can be seen that silicone rubber is severely swelled and deformed by a solvent even if it has dust removal performance, and is inferior in reproduction durability.

1 is a front view of a cleaning bar according to an embodiment of the present invention in which an adhesive member is attached to one end of a bar body. It is sectional drawing of the example. It is a front view of the cleaning bar which concerns on the other Example of this invention which made the adhesive member adhere to the both ends of a bar main body. It is sectional drawing of the example.

Explanation of symbols

1 Perfluoropolyether fluororubber molded product 2 Bar body

Claims (6)

  A cleaning bar characterized in that perfluoropolyether-based fluorine-containing rubber is used as an elastic adhesive member for removing dust on the flat surface and uneven portions of an object to be cleaned.   2. The cleaning bar according to claim 1, wherein the perfluoropolyether-based fluorine-containing rubber is adhered to one end or both ends of the bar main body. Claims, characterized in that the cross-linking site of perfluoropolyether fluororubber crosslinking fluororubber composition to obtain is Si-CH = CH ₂ cross-linking system is an addition reaction crosslinking or peroxide crosslinking The cleaning bar according to 1 or 2. The perfluoropolyether fluorine-containing rubber is
(A) a perfluoro compound having at least two alkenyl groups in the molecule and having a divalent perfluoroalkylene structure or a divalent perfluoropolyether structure in the main chain;
(B) Crosslinkability comprising a reinforcing filler, and (C) a crosslinking agent having a hydrosilyl group in the molecule or a peroxide crosslinking agent in an amount sufficient to cure the component (A). The cleaning bar according to any one of claims 1 to 3, wherein the cleaning bar is obtained by curing a fluororubber composition. (A) component is the following general formula (1)

[Wherein, X is _{-CH 2 -, - CH 2 O} -, - CH 2 OCH 2 - or -Y-NR-CO- (Y is -CH ₂ - or the following structural formula (Z)

(Group represented by o, m or p position)
R is a hydrogen atom, methyl group, phenyl group or allyl group, X ′ is —CH ₂ —, —OCH ₂ —, —CH ₂ OCH ₂ — or —CO—NR—Y ′ — (Y 'Is -CH ₂ -or the following structural formula (Z')

(Group represented by o, m or p position)
R is the same as above. a is independently 0 or 1, L is an integer of 2 to 6, and b and c are integers of 0 to 200, respectively. ]
The cleaning bar according to claim 4, which is a linear fluoropolyether compound represented by the formula: 6. The cleaning bar according to claim 2, wherein the bar body is made of any one of metal, glass, ceramics, and plastic.

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