WO2013168616A1 - Matériau de masquage, méthode de fabrication de matériau de masquage, élément de masquage, méthode de masquage et méthode de fabrication d'élément revêtu - Google Patents

Matériau de masquage, méthode de fabrication de matériau de masquage, élément de masquage, méthode de masquage et méthode de fabrication d'élément revêtu Download PDF

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Publication number
WO2013168616A1
WO2013168616A1 PCT/JP2013/062437 JP2013062437W WO2013168616A1 WO 2013168616 A1 WO2013168616 A1 WO 2013168616A1 JP 2013062437 W JP2013062437 W JP 2013062437W WO 2013168616 A1 WO2013168616 A1 WO 2013168616A1
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Prior art keywords
masking
masking material
masked
acrylic rubber
meth
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PCT/JP2013/062437
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English (en)
Japanese (ja)
Inventor
小野　義友
八重 石川
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リンテック株式会社
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Publication of WO2013168616A1 publication Critical patent/WO2013168616A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/16—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area
    • B05B12/20—Masking elements, i.e. elements defining uncoated areas on an object to be coated

Definitions

  • the present invention relates to a masking material for masking used when it is not desired to attach a paint during coating, a method for producing such a masking material, a masking member provided with such a masking material, and such a masking member.
  • the present invention relates to a masking method using a coating material and a method for producing a painted member.
  • a masking tape is generally used for masking a portion where a paint is not desired to be applied during painting.
  • the masking tape is composed of a tape base material, an adhesive layer, and a release paper.
  • the release paper is peeled off, and the masking tape is applied to the masked portion using the adhesive force of the exposed adhesive layer. Then, it is peeled off from the masked portion after painting and discarded.
  • both the release paper and the masking tape after painting are wastes to be discarded, which is a waste of resources.
  • the masking tape that has been applied once is peeled off and then reapplied, it may not be possible to reapply or the parting line may not appear clean due to a decrease in the adhesive strength of the adhesive layer.
  • a desired adhesive strength cannot be obtained unless the oil content in the masked portion is removed.
  • Patent Document 1 proposes to use a sheet containing magnetic powder as a masking sheet. According to such a masking sheet, it is possible to save the masking work by using the magnetic force.
  • the masking sheet described in Patent Document 1 is chlorinated polyethylene, nitrile rubber (NBR), ethylene-propylene-diene rubber (EPDM), chlorinated polyethylene (CPE), ethylene-vinyl acetate copolymer (EVA), chlorinated.
  • soft plastics such as sulfonated polyethylene and soft vinyl chloride are used as the main resin component, the heat resistance is low.
  • the masking sheet is deformed or melted. In particular, when the masking sheet is melted, the masking sheet is fused to the masked portion, and the masked portion is contaminated.
  • the present invention has been made in view of such a situation, and is excellent in heat resistance, that is, not easily deformed even when heated, and a masking material that can be repeatedly used. It aims at providing the manufacturing method, the masking member provided with such a masking material, the masking method using such a masking member, and the manufacturing method of a coating member.
  • the present invention completed on the basis of the above knowledge firstly includes an acrylic rubber having a crosslinked structure based on an amine-based crosslinking agent and a magnetic material, and the content of the magnetic material is based on 100 parts by mass of the acrylic rubber.
  • a masking material characterized by being 10 to 80 parts by volume (Invention 1).
  • the Shore D hardness is 10 to 40 when the integration time in a 180 ° C. environment is 13 hours (Invention 2).
  • Such a masking material further reduces the possibility that a paint or the like may enter during use between the masking material and the masked part even when the usage environment is high.
  • the acrylic rubber preferably contains a polymer having a structural unit derived from an alkoxyalkyl ester of (meth) acrylic acid (Invention 3).
  • the said acrylic rubber contains the copolymer which has a structural unit derived from the (meth) acrylic-acid alkylester and a structural unit derived from the (meth) acrylic-acid alkoxyalkylester.
  • the acrylic rubber contains the copolymer according to the inventions (Inventions 3 and 4), a masking material that is superior in heat-curing resistance can be obtained.
  • an anti-aging agent Invention 5
  • an anti-aging agent By containing an anti-aging agent, it becomes easy to obtain a masking material excellent in heat-curing resistance.
  • the bending resistance measured by the Gurley method is 6.0 N or less (Invention 6) when the sheet is molded into a sheet having a thickness of 1 mm.
  • the bending resistance is 6.0 N or less, it becomes easy to improve the followability of the masking material to the masked portion when the masking material is attached to the masked portion.
  • the breaking strength is preferably 2 MPa or more and 20 MPa or less (Invention 7).
  • the breaking strength is 2 MPa or more, even if a force that extends the masking material is applied during the masking material attachment / detachment operation, the possibility of problems such as cracking or breaking of the masking material is reduced. can do.
  • the breaking elongation when the masking material molded into a sheet having a thickness of 1 mm is stretched at 20 mm / min is 50% or more (Invention 8).
  • the elongation at break is 50% or more, even when a force for extending the masking material is applied during the attaching / detaching operation of the masking material, the possibility of causing a problem such as breaking of the masking material can be reduced. .
  • the said masking material is heat-processed in the state adhering to a to-be-masked part,
  • the said magnetic body contained in the said masking material is the heating temperature in the said heat processing. It is preferably made of a ferromagnetic material having a higher Curie temperature (Invention 9). By using such a material as the magnetic material, the masking material is unlikely to deteriorate in the masking material even when heat treatment is performed during use.
  • the member to be masked may be subjected to a coating process (Invention 10) prior to the heat treatment. Even in such a case, the masking material is unlikely to deteriorate the masking function because the magnetic material is made of a ferromagnetic material having a Curie temperature higher than the heating temperature in the heat treatment.
  • the present invention is secondly a state before the composition for forming a masking material according to any of the above inventions (Inventions 1 to 10) is molded and before the crosslinking reaction of the amine crosslinking agent proceeds.
  • the molded product having a cross-linking structure based on the amine-based crosslinking agent is obtained by heating the obtained molded product to advance the crosslinking reaction of the amine-based crosslinking agent contained in the molded product.
  • a method for producing a masking material characterized by forming a masking material containing acrylic rubber (Invention 11).
  • a masking material that is less likely to be deformed or melted even when placed in an environment at a high temperature of about 180 ° C. during use, has excellent heat-resistant curing properties, and can therefore be used repeatedly. Can be obtained.
  • a heating temperature T 1 (unit: ° C.) when heating the molded article, and a maximum heating temperature T 2 (unit: ° C.) that the masking material receives when using the masking material, Preferably satisfies the following formula (Invention 12).
  • T 1 > T 2 -30 ° C
  • the present invention is a masking member having at least one masking surface for contacting the masked portion, and the masking member is made of the masking material according to any one of the above inventions (Inventions 1 to 10).
  • a masking member is provided (Invention 13).
  • the present invention is a masking member having at least one masking surface for contacting the masked portion, wherein the masking member comprises the masking material according to any one of the inventions (Inventions 1 to 10), The masking surface is formed of the masking material, and provides a masking member (Invention 14).
  • the masking surface of the masking member according to any one of the above inventions is brought into contact with the masked portion of the masked member so that the masking member becomes the masked member.
  • a masking method characterized by being mounted is provided (Invention 15).
  • the present invention sixthly, the paint is adhered to the object to be coated comprising the masking member to which the masking material obtained by performing the masking method according to the above invention (Invention 15) is attached, A part in which a coating film is formed on the surface of the object to be coated from the paint adhered to the object to be coated, the masking material is removed from the object to be coated, and a film is not formed on the masked part of the masking member
  • a method for producing a painted member characterized in that a painted member comprising the above is obtained (Invention 16).
  • the masking material according to the present invention is excellent in heat resistance, problems such as deformation and melting hardly occur even if it is placed in an environment at a high temperature of about 180 ° C. during use.
  • the masking material according to the present invention can be applied to the masking material and the coating material even in a high temperature environment. It is difficult for paint to enter between the masking part and the unit during use. Therefore, the masking material according to the present invention can be used repeatedly.
  • the masking material manufacturing method according to the present invention can manufacture the masking material as described above. Furthermore, according to the masking method according to the present invention using the masking member provided with the masking material as described above, the masking material can be repeatedly used, and a method for producing a coated member including such a masking method as one of the steps. Can efficiently produce a painted member including a non-painted portion.
  • the masking material which concerns on one Embodiment of this invention is equipped with the masking surface which contacts a to-be-masked part, and contains the acrylic rubber and magnetic body which have a crosslinked structure based on an amine type crosslinking agent.
  • the “masked portion” means a portion to be masked, and a member including the masked portion is referred to as a “masked member”.
  • the member to be masked exhibits at least ferromagnetism as a whole.
  • Acrylic rubber means a homopolymer composed of structural units derived from (meth) acrylic acid ester or (meth) acrylic acid amide, (meth) acrylic acid ester and / or ( Copolymers composed of structural units derived from (meth) acrylic acid amides, and structural units derived from (meth) acrylic acid esters and / or (meth) acrylic acid amides and compounds other than (meth) acrylic acid esters (typical Is a compound having a polymerizable unsaturated bond, and in the present embodiment, also referred to as “other polymerizable compound”.) 1 type or 2 types selected from the group consisting of copolymers with structural units derived from It contains a polymer comprising the above and / or a crosslinking reaction product of the polymer and an amine-based crosslinking agent, and is a mechanical rubber-like elastic body. It means a material having properties.
  • (meth) acrylic acid ester means both acrylic acid ester and
  • the structure of the ester group of the (meth) acrylic acid ester used to form the acrylic rubber is not particularly limited, and may be a (meth) acrylic acid alkyl ester or has a functional group at the alkyl position (meta) ) Acrylic acid alkyl ester may be used.
  • alkyl (meth) acrylate esters include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, and 2-ethylhexyl (meth) acrylate. Etc. Among these, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, and methyl methacrylate are preferable from the viewpoint of handling and availability.
  • Examples of the functional group possessed by the ester moiety include an alkoxy group, a hydroxyl group, an amino group, and an epoxy group.
  • Specific examples of the (meth) acrylic acid alkyl ester having such a functional group include (meth) acrylic acid alkoxyesters such as (meth) acrylic acid methoxyethyl and (meth) acrylic acid ethoxyethyl; (meth) acrylic acid 2- Hydroxyethyl, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 3-hydroxybutyl (meth) acrylate, 4-methacrylic acid 4- (Meth) acrylic acid hydroxyalkyl esters such as hydroxybutyl; (meth) acrylic acid monomethylaminoethyl, (meth) acrylic acid monoethylaminoethyl, (meth) acrylic acid monomethylaminopropyl, (meth) acrylic acid monoeth
  • examples of (meth) acrylic amide include (meth) acrylamide, N-methylacrylamide, N-methylmethacrylamide, N-methylolacrylamide, N-methylolmethacrylamide and the like.
  • the acrylic rubber preferably contains a polymer having a structural unit derived from an alkoxyalkyl ester of acrylic acid. In this case, it is easy to obtain an acrylic rubber excellent in heat-curing resistance. Moreover, it is easy to obtain acrylic rubber having high oil resistance.
  • the (meth) acrylic acid ester and (meth) acrylic acid amide used for forming the acrylic rubber may be used alone or in combination of two or more.
  • the acrylic rubber according to the present embodiment includes a component based on a copolymer having a structural unit derived from a plurality of types of (meth) acrylic acid esters
  • the (meth) acrylic acid ester is an alkyl (meth) acrylate. It is preferable to include an ester and an alkoxyalkyl ester of (meth) acrylic acid.
  • the acrylic rubber contains such a component by including a component based on a copolymer having a structural unit derived from a (meth) acrylic acid alkyl ester and a structural unit derived from a (meth) acrylic acid alkoxyalkyl ester In this case, it is easy to obtain an acrylic rubber having excellent heat resistance and excellent heat resistance.
  • the type of other polymerizable compound used for forming the acrylic rubber is not particularly limited as long as it can undergo a polymerization reaction with the (meth) acrylic acid ester. Typically, it is a compound having a polymerizable unsaturated bond as described above.
  • Such compounds include olefins such as ethylene, propylene, n-butene, norbornene, and cyclohexene; aromatic compounds having an ethylenically unsaturated bond such as styrene and derivatives thereof; (meth) acrylic acid, crotonic acid, cinnamic acid, and the like ⁇ , ⁇ -ethylenically unsaturated monocarboxylic acid having 3 to 12 carbon atoms; ⁇ , ⁇ -ethylenically unsaturated dicarboxylic acid having 4 to 12 carbon atoms such as fumaric acid, maleic acid, itaconic acid, citraconic acid; Monoesters of ⁇ , ⁇ -ethylenically unsaturated dicarboxylic acids having 3 to 11 carbon atoms and alkanols having 1 to 8 carbon atoms such as monoethyl acid, monocyclopentyl fumarate, monobutyl maleate, monobutyl itaconate
  • ⁇ , ⁇ -ethylenically unsaturated dicarboxylic acid is contained as a structural unit in the form of dicarboxylic anhydride in acrylic rubber, and is hydrolyzed during crosslinking to form a carboxyl group. May be generated.
  • compounds having a carboxyl group such as ⁇ , ⁇ -ethylenically unsaturated monocarboxylic acid and ⁇ , ⁇ -ethylenically unsaturated dicarboxylic acid can form a reaction point with the amine-based crosslinking agent described later. Therefore, it is preferable.
  • the carboxyl group in this compound may be in the form of an acid anhydride as described above.
  • the other polymerizable compounds may be used alone or in combination of two or more.
  • the proportion of the structural units derived from these compounds in the acrylic rubber is arbitrary, and the acrylic What is necessary is just to set suitably considering the use etc. of the masking material containing rubber
  • an acrylic rubber having a low embrittlement temperature tends to be obtained when the ratio of alkyl methacrylate having a bulky alkyl group such as a butyl group is high, and other polymerizable compounds having a carboxyl group tend to be obtained.
  • a hard acrylic rubber may be obtained if the degree of crosslinking reaction with the amine-based crosslinking agent is high.
  • the cross-linking agent used for forming the cross-linking structure of the acrylic rubber according to this embodiment includes an amine-based cross-linking agent.
  • the “amine-based crosslinking agent” means a bifunctional or higher amine-based compound, and is not particularly limited as long as it is a compound having two or more nitrogen atoms having at least one active hydrogen. Since the acrylic rubber according to the present embodiment has a cross-linked structure, it is prevented that the masking material according to the present embodiment is excessively softened even when exposed to a high temperature environment of 180 ° C., for example.
  • the masking material according to the present embodiment is excellent in heat-curing resistance as compared with a case where it is based on another cross-linking agent such as an isocyanate-based cross-linking agent. For this reason, even if it uses repeatedly, the masking function of a masking material does not fall easily.
  • amine-based crosslinking agents examples include 1,4-butanediamine, 1,9-nonanediamine, 2-methyl-1,8-octanediamine, 1,4-diaminocyclohexane, triethylenetetramine, tetraethylenepentamine, and ethylenediamine.
  • Aliphatic polyamines such as undecane; Aromatic polyamines such as diaminodiphenylmethane, xylylenediamine, phenylenediamine, diaminodiphenylsulfone; carbazic acid, 6-aminohexylcarbamic acid, 4,4′-methylenebis (cyclohexylamine) carbamide Amino carbamic acid and the like; further such as salts of the polyamines and amino carbamic acid.
  • the amine-based crosslinking agent may be composed of one kind of compound or may be composed of a plurality of kinds of compounds.
  • the amine-based cross-linking agent used for forming the acrylic rubber according to the present embodiment preferably contains aminocarbamic acid and / or a salt thereof from the viewpoint of improving the heat resistance.
  • the amount of the amine-based crosslinking agent used for forming the acrylic rubber is usually preferably 0.01 to 10 parts by mass with respect to 100 parts by mass of the polymer constituting the acrylic rubber. More preferably, it is 1 to 5 parts by mass.
  • the degree of the cross-linking structure based on the amine-based cross-linking agent in the acrylic rubber according to this embodiment is not particularly limited.
  • the density of cross-linking points is not particularly limited.
  • the masking material becomes too hard and difficult to deform due to the content of other components (especially magnetic substances) contained in the masking material, and masking the shape of the masked part.
  • the density of cross-linking points should be appropriately set in consideration of the composition of the material constituting the masking.
  • the content of the uncrosslinked amine-based crosslinking agent remaining in the acrylic rubber contained in the masking material according to the present embodiment is as small as possible.
  • an uncrosslinked amine-based cross-linking agent is heated during use of the masking material to cause a cross-linking reaction, the density of cross-linking points in the acrylic rubber increases during use, increasing the Shore D hardness of the masking material. Is brought about. When the degree of increase in hardness is significant, the masking function of the masking material may be lowered.
  • the acrylic rubber according to this embodiment preferably contains a crosslinking accelerator.
  • the crosslinking accelerator include amino compounds such as triethylamine and tetramethylbutanediamine, stannous chloride, dimethyltin dichloride, trimethyltin hydroxide, di-n-butyltin dilaurate, dibutyltin diacetate, dibutyltin sulfide, chloride chloride
  • Metal compounds such as ferric iron, iron acetyl acetate, cobalt naphthenate, bismuth nitrate, lead oleate, and antimony trichloride can be used.
  • Magnetic body As a material which comprises the magnetic body which the masking material which concerns on this embodiment contains, for example, metals, such as iron, nickel, cobalt, those alloys (for example, stainless steel) or oxide, or strontium ferrite Ferrites such as barium ferrite, manganese zinc ferrite, nickel zinc ferrite and copper zinc ferrite, alnicos such as aluminum-nickel-cobalt alloys, rare earth-transition metals (eg, SmCo, SmFeN, NbFeB), etc. Rare earth-based ferromagnetic materials. Among these, from the viewpoint of easy control of the magnetic force, a ferrite type is preferable, and among them, strontium ferrite and barium ferrite are more preferable.
  • metals such as iron, nickel, cobalt, those alloys (for example, stainless steel) or oxide
  • strontium ferrite Ferrites such as barium ferrite, manganese zinc ferrite, nickel zinc ferrite and copper zinc fer
  • the magnetic body is preferably made of a ferromagnetic material having a Curie temperature higher than the heating temperature in the heat treatment.
  • the shape of the magnetic material is preferably a powder shape from the viewpoint of ease of molding of the masking material.
  • the volume average particle diameter is preferably 0.1 to 100 ⁇ m, more preferably 0.3 to 50 ⁇ m, and particularly preferably 0.5 to 20 ⁇ m.
  • the volume average particle size of the powder-shaped magnetic material referred to here is a laser diffraction type particle size distribution measuring device (manufactured by Horiba, Ltd., product name: laser diffraction / scattering type particle size distribution measuring device LA-920). The volume average particle diameter measured by a measuring method based on JIS K5600-9-3.
  • the content of the magnetic substance in the masking material according to the present embodiment is 10 parts by volume or more and 80 parts by volume or less with respect to 100 parts by volume of acrylic rubber having a crosslinked structure based on an amine-based crosslinking agent. If the content is excessively large, the masking material becomes hard. Conversely, if the content is excessively low, the adhesion force based on the magnetic force of the masking material to the masked portion decreases, and in either case, the masking function decreases. However, by setting the content of the magnetic substance in the above range, it is possible to avoid a decrease in adhesion. If the content of the magnetic material is 15 parts by volume or more and 70 parts by volume or less with respect to 100 parts by volume of the acrylic rubber, the decrease in the adhesion can be avoided more stably. More preferably, it is not more than the volume part.
  • the masking material which concerns on this embodiment may contain an anti-aging agent in addition to said acrylic rubber and a magnetic body.
  • the type of anti-aging agent is not particularly limited as long as the antioxidant effect is high.
  • an amine-ketone type anti-aging agent such as a 2,2,4-trimethyl-1,2-dihydroquinoline polymer; 4 , 4-bis ( ⁇ , ⁇ -dimethylbenzyl) diphenylamine, N, N′-di-2-naphthyl-p-phenylenediamine and other aromatic secondary amine antioxidants; zinc salt of 2-mercaptobenzimidazole And benzimidazole anti-aging agents such as zinc salt of 2-mercaptomethylbenzimidazole; dithiocarbamate anti-aging agents such as nickel dibutyldithiocarbamate; and phosphite anti-aging agents such as tris (nonylphenyl) phosphate Can be mentioned.
  • the anti-aging agent may be composed of one kind or two
  • the content of the anti-aging agent is not particularly limited, and should be set as appropriate in consideration of its function and the composition of the acrylic rubber.
  • the content of the anti-aging agent is usually preferably 0.001 to 1 part by mass, more preferably 0.01 to 0.1 part by mass with respect to 100 parts by mass of the acrylic rubber.
  • the masking material which concerns on this embodiment may further contain additives, such as a dispersing agent, as other components.
  • a nonmagnetic material such as talc or kaolin may be contained for the purpose of adjusting the hardness.
  • the content of these components is not particularly limited, and may be set so as not to lower the masking function of the masking material.
  • the masking material according to the present embodiment has a Shore D hardness (also referred to as “post-heated Shore D hardness” in the present embodiment) when the accumulated time placed in an environment of 180 ° C. is 13 hours. )) Is preferably 10-40.
  • the masking material follows the shape of the masked part when the masking material is brought into contact with the masked part even when it is repeatedly used because the Shore D hardness after heating of the masking material is 40 or less. Becomes easy. From the viewpoint of stably improving the followability of the masking material to the masked portion, the Shore D hardness after heating is preferably 35 or less, and more preferably 30 or less.
  • the Shore D hardness after heating tends to be 40 or less, and if the composition is appropriately adjusted, it is sufficiently more than 30 A low value is also possible.
  • the Shore D hardness after heating of the masking material is 10 or more, it is avoided that the workability of attaching the masking material to the masked portion is significantly reduced.
  • the Shore D hardness after heating is less than 10, there is a concern that the masking material may adhere to the masked portion depending on the components of the acrylic rubber, and the masking material removal operation becomes difficult.
  • the Shore D hardness after heating of the masking material is preferably 12 or more, and more preferably 14 or more.
  • the masking material according to the present embodiment preferably has a bending softness of 6.0 N or less.
  • the “bending softness” is a bending softness measured using a Gurley type tester defined in JIS L1096 when a masking material is molded into a sheet having a thickness of 1 mm. It means the bending resistance by the Gurley method.
  • the bending resistance is 6.0 N or less, it becomes easy to improve the followability of the masking material to the masked portion when the masking material is attached to the masked portion.
  • the bending resistance of the masking material is preferably 5.5 N or less, and more preferably 5.0 N or less.
  • the bending resistance of the masking material is preferably as low as possible from the viewpoint of improving its followability, but if it is excessively low, there is a problem when the masking material is attached to or detached from the masked member as in the case of Shore D hardness described above. Therefore, the bending resistance of the masking material is usually preferably 0.5 N or more.
  • the masking material according to the present embodiment preferably has a breaking strength measured in accordance with JIS K7127 (measurement environment: 23 ° C., 50% RH) of 2 MPa or more and 20 MPa or less.
  • the breaking strength is 2 MPa or more, even if a force that extends the masking material is applied during the masking material attachment / detachment operation, the possibility of problems such as cracking or breaking of the masking material is reduced. can do.
  • the breaking strength of the masking material is more preferably 3 MPa or more, and further preferably 4 MPa or more.
  • the breaking strength of the masking material is usually preferably 20 MPa or less because the above-mentioned bending resistance may tend to increase excessively.
  • breaking elongation is preferably 50% or more.
  • breaking elongation is preferably 50% or more.
  • the breaking elongation of the masking material is preferably 60% or more, and more preferably 100% or more. From the viewpoint of avoiding the above problems, the higher the breaking elongation of the masking material, the better. However, if it is excessively high, the above-mentioned bending resistance may tend to increase excessively.
  • the elongation at break is usually preferably 2000% or less.
  • the dimensional change rate in the in-plane direction of the surface in contact with the masked portion is small.
  • the rate of dimensional change when the cumulative time under a 180 ° C. environment is 13 hours is preferably within a range of ⁇ 5.0%, particularly preferably within a range of ⁇ 3.0%.
  • the dimensional change rate of the masking material is within the above range, it can be said that the dimensional stability of the masking material is excellent. Further, in this case, since the material is not easily deformed even when heated, and particularly difficult to shrink, the masking performance after heating is excellent.
  • the manufacturing method of the masking material which concerns on this embodiment is not limited. It is appropriately set according to the composition and shape to be formed. Since the masking material has a cross-linked structure, the molded product in the state before the cross-linking reaction of the amine-based cross-linking agent obtained by molding the material for forming the masking material is heated. The method of advancing the crosslinking reaction of the amine-based crosslinking agent contained in the molded product is preferable from the viewpoint of ease of production and quality stability. An example of the method is as follows.
  • the polymer constituting the acrylic rubber, the amine-based cross-linking agent and the magnetic material, and further containing additional components such as an anti-aging agent, if necessary, are in a state before the cross-linking reaction between the polymer and the cross-linking agent proceeds.
  • a composition is prepared. Specifically, the above polymer, amine-based crosslinking agent and magnetic substance (preferably magnetic powder), and if necessary, further additives are melted using a Henschel mixer, single or twin screw extruder, Banbury mixer, roll, etc. What is necessary is just to mix. The composition is subjected to a molding process to roughly form the shape of the masking material.
  • the molding method include calendar molding, injection molding, extrusion molding, and the like, and injection molding is preferable because a molded product with high shape accuracy can be easily obtained.
  • a masking material can be obtained by heating the obtained molded article and allowing the crosslinking reaction to proceed.
  • the masking material obtained in the above manufacturing process or the obtained masking material may be magnetized by a known method.
  • the heating temperature for proceeding the crosslinking reaction should be appropriately set depending on the type of the crosslinking agent, etc. It is preferable to set the temperature equal to the maximum heating temperature (hereinafter referred to as “use temperature”) that the masking material receives when using the mask. If the crosslinking temperature is excessively lower than the use temperature, the crosslinking reaction may not be completed in the masking material manufacturing stage, and the crosslinking reaction may proceed when the masking material is heated during use of the masking material. Is done. In this case, there may be a problem that the Shore D hardness after heating is increased and the masking function is lowered. From the viewpoint of stably avoiding such a problem, it is preferable that the crosslinking temperature T 1 be higher than the use temperature T 2 -30 ° C., that is, satisfy the following formula. T 1 > T 2 -30 ° C
  • T 1 is preferably 40 ° C. or more, and more preferably 50 ° C. or more.
  • the crosslinking temperature T 1 is preferably 100 to 200 ° C., and more preferably 140 to 180 ° C.
  • the heating time for advancing the crosslinking reaction of the molded product is arbitrary, and may be appropriately set in consideration of the type of crosslinking agent and the crosslinking temperature.
  • the cross-linking reaction of the molded product is almost completed so that the cross-linking reaction proceeds in the masking material due to heating of the masking material during use and the hardness of the masking material does not increase excessively during use. In consideration of this, it is preferable to set the heating time.
  • the masking material according to the present embodiment may be a member used when performing a masking operation as it is.
  • a member having at least one masking surface for contacting the masked portion is referred to as a “masking member”.
  • the masking member according to the present embodiment includes the masking material according to the above-described embodiment, and the masking member is made of a masking material as a specific example, and the masking member is a member other than the masking material as another specific example.
  • the material constituting the masking surface is a masking material.
  • the masking member is made of a masking material
  • the masking member can be obtained by performing the above-described masking material manufacturing method, which may be advantageous from the viewpoint of productivity.
  • the portion on the masking surface side of the masking member may be composed of the aforementioned masking material, and the other portion of the masking member may be composed of other than the masking material.
  • the shape flexibility of the masking member may be increased.
  • the shape of the masking member and the shape of the masking material according to this embodiment are not particularly limited. It may be a sheet shape or a block shape. In the case of a sheet, the thickness is arbitrary, and is preferably 0.3 to 2.5 mm, more preferably 0.5 to 1.5 mm from the viewpoint of easy attachment / detachment work of the masking member. is there. Moreover, it is preferable that the surface (masking surface) which contacts a masking member and the member to be masked of a masking material is smooth. In addition, when a masking member contains components other than a masking material as mentioned above, it is preferable from a viewpoint of improving the masking function of a masking material that the components other than a masking material also contain a magnetic body.
  • the magnetic fixing force of the masking member is preferably 3 to 20 N, and particularly preferably 4 to 15 N.
  • the magnetic fixing force of the masking member is 4N or more, the possibility that the masking member attached to the member to be masked may fall off during use can be reduced. Further, since the magnetic fixing force of the masking member is 20 N or less, an operation of removing the masking member from the member to be masked for the purpose of changing the mounting position becomes easy.
  • the magnetic fixing force of the masking member is 100 mm long when a masking member (40 mm ⁇ 150 mm, thickness 1.5 mm) made of a masking material is applied to a stainless steel plate (thickness 1.5 mm, SUS430 plate) as a member to be masked.
  • a masking member 40 mm ⁇ 150 mm, thickness 1.5 mm
  • SUS430 plate stainless steel plate
  • the magnetic force of the masking member should be appropriately set according to the purpose of use, but is usually preferably 20 to 100 mT. If the magnetic force of the masking member is 20 mT or more, the possibility that the masking member attached to the member to be masked will drop off during use can be reduced. Further, when the magnetic force of the masking member is 100 mT or less, the work of removing the masking member from the member to be masked becomes easy.
  • the magnetic force here refers to a magnetic force measured by a gauss meter at a distance of 1 cm from the surface of the masking member.
  • Method for using the masking member according to the present embodiment is not limited. For example, when the masking material of the masking member is placed opposite to the masked portion of the masked member, the masking material adheres to the masked portion by the magnetic force of the masking member, and the masking member is attached to the masked member.
  • the masking member on which the masking member is mounted is subjected to heat treatment, if the Curie temperature of the magnetic material contained in the masking member is set higher than the heating temperature related to the heat treatment, The magnetic force of the masking material that causes the adhesive force to the masking portion is not significantly attenuated.
  • the masking member may be subjected to a heating process.
  • a masking member having a masking material containing a magnetic material appropriately selected as described above maintains the magnetic force even when the heat treatment is performed. Therefore, the masking member is coated by a coating process performed before the heat treatment. It is suppressed that the coating material applied other than the masking portion enters the masked portion during the heat treatment.
  • the masking member removed from the member to be masked after the heat treatment may be attached to another member to be masked and subjected to the heat treatment.
  • the masking member according to the present embodiment can maintain an excellent masking function even if such repeated use is made.
  • the masking method described above may be used in a method for manufacturing a painted member described below, or may be used in a method for manufacturing a plated member or a member subjected to blasting.
  • Manufacturing method of coating member An example of the method of manufacturing the coating member in which the coating film is not partially formed using the masking member which concerns on this embodiment comprises the following step.
  • the masking member in the masking member according to this embodiment is brought into contact with the masked portion of the masked member, and the masking member is mounted on the masked member.
  • the masked member on which the masking member is mounted is also referred to as a body to be coated.
  • the specific shape of the member to be masked is arbitrary, and housings and frames of electrical products such as portable devices, liquid crystal televisions, refrigerators, lighting fixtures; building materials such as doors and window frames; furniture such as chairs and tables;
  • the shapes of various articles such as structural members (main body, bonnet, etc.) and components (slide rails, carriers, etc.) of transportation equipment are exemplified.
  • the paint is not particularly limited. It may be a water-based paint or a solvent-based paint. Since the acrylic rubber contained in the masking material according to the present embodiment has a cross-linked structure, it is difficult for such a coating to deteriorate.
  • Adhesion step In the adhesion step, the object to be coated is brought into contact with the paint, and the paint is adhered to the object to be coated.
  • the method for contacting the paint is arbitrary. Specific examples include dip coating, spraying, roll coating, electrodeposition coating, and the like. Conditions such as the composition, temperature, and immersion time of the paint are appropriately set according to the coating method.
  • Coating film forming step a coating film is formed on the surface of the object to be coated from the paint adhering to the object to be coated through the above adhesion step.
  • This formation method is arbitrary and is usually dry. The details of this drying method should be determined by the paint, and the object to be coated may be heated or left in the atmosphere.
  • the masking member is removed from the object to be coated that has undergone the above-described coating film forming step, and the coating film is applied to the portion (corresponding to the masked portion) where the masking material of the masking member is in contact. A painted member having a portion that is not formed is obtained.
  • the masking member removed in this removal step is used in a mounting step for another object to be coated.
  • the masking member according to the present embodiment hardly maintains a masking function even after being subjected to the coating film forming step, and therefore can maintain an excellent masking function even when used repeatedly.
  • Example 1 A structural unit derived from ethyl acrylate (EA), a structural unit derived from n-butyl acrylate (BA) and a structural unit derived from methoxyethyl acrylate (MEA) in a molar ratio of 1: 7: 4. (Hereinafter, the molar ratio of these components is referred to as “acrylate molar ratio”), and further contains a copolymer containing a trace amount of a structural unit derived from a compound having a carboxy group, and 100 parts by mass of this copolymer.
  • EA ethyl acrylate
  • BA n-butyl acrylate
  • MEA methoxyethyl acrylate
  • an acrylic rubber which is composed of 1 part by mass of 6-aminohexylcarbamic acid as an amine-based cross-linking agent and is in a state before the crosslinking reaction proceeds, , 4-Bis ( ⁇ , ⁇ -dimethylbenzyl) diphenylamine, and 47 parts by volume of Stron with respect to 100 parts by volume of the above-mentioned acrylic rubber
  • a composition as a molding material by mixing magnetic material consisting um ferrite (a volume average particle diameter 16 [mu] m).
  • a molded body having a sheet shape of 1 mm thickness was obtained by magnetization and injection molding using a mold in a magnetic field.
  • the volume average particle size of the magnetic material is determined by using a laser diffraction particle size distribution measuring device (product name: Laser diffraction / scattering particle size distribution measuring device LA-920, manufactured by Horiba Seisakusho Co., Ltd.) according to JIS K5600-9. It was measured by a measurement method based on -3.
  • the obtained molded body was put into a thermostatic bath whose furnace was maintained at 170 ° C., and the molded body was heated at a crosslinking temperature of 170 ° C. for 3 hours. Thereafter, the molded body was taken out from the thermostat and allowed to cool to room temperature to obtain a test sample of the masking material.
  • Example 2 In preparing the composition in Example 1, the acrylate molar ratio was changed from 1: 7: 4 to 1: 8: 3, and the same operation as in Example 1 was performed except that no anti-aging agent was contained. A sheet-like molded product having a thickness of 1 mm was obtained from the composition.
  • a test sample of a masking material was obtained in the same manner as in Example 1 except that the obtained molded body was heated at a crosslinking temperature of 150 ° C. for 3 hours.
  • Example 2 In preparing the composition in Example 1, in place of the amine-based crosslinking agent, an operation similar to that in Example 1 except that an isocyanate-based crosslinking agent (manufactured by Nippon Polyurethane Co., Ltd., product name: Coronate L) was used as the crosslinking agent. To obtain a molded product having a thickness of 1 mm from the composition. Hereinafter, a test sample of a masking material was obtained in the same manner as in Example 1 except that the obtained molded body was heated at a crosslinking temperature of 150 ° C. for 3 hours.
  • an isocyanate-based crosslinking agent manufactured by Nippon Polyurethane Co., Ltd., product name: Coronate L
  • Example 3 In preparing the composition in Example 1, molding was carried out in the same manner as in Example 1 except that the content of the magnetic material was set to 100 parts by volume with respect to 100 parts by volume of the acrylic rubber. I got a product. Hereinafter, a test sample of a masking material was obtained in the same manner as in Example 1 except that the obtained molded body was heated at a crosslinking temperature of 150 ° C. for 3 hours.
  • Comparative Example 4 In preparing the composition in Comparative Example 1, 100 parts by volume of polyester (manufactured by Toyobo Co., Ltd., product name: perprene) without containing acrylic rubber and an amine-based crosslinking agent and 47 parts by volume of a magnetic material made of strontium ferrite were used. The composition was obtained by mixing. This composition was molded in the same manner as in Example 1 to obtain a molded product having a thickness of 1 mm, which was used as a test sample for the masking material.
  • polyester manufactured by Toyobo Co., Ltd., product name: perprene
  • Test Example 1 Immersion test A test piece in a circular sheet shape having a diameter of 30 to 50 mm was cut out from the test samples prepared in Examples and Comparative Examples, and this test piece was mounted on a steel plate (SUS430 2B). In addition, about the test piece of the comparative example 1, it affixed using a 2 kg roller. The steel plate to which the test piece is attached or stuck was immersed in a tank filled with an aqueous coating solution (liquid temperature: 23 ° C.). The steel plate was taken out 10 minutes after the start of immersion, the masking material or the masking tape was removed, and the presence or absence of the coating liquid on the masked portion of the steel plate was confirmed. The evaluation criteria are as follows. A: No adhesion F: Adhesion Evaluation results are shown in Table 1. In addition, about the test sample of the comparative example 1 evaluated as having adhesion (F) in this evaluation, evaluation after the test example 2 was not implemented.
  • Test Example 2 Measurement of Shore D Hardness after Heating
  • the test sample of the masking material prepared in Examples and Comparative Examples was subjected to a cycle in which the sample was left in an environment at 180 ° C for 40 minutes and then left in an environment at 23 ° C for 40 minutes.
  • Shore D hardness was measured before and after a heating test repeated 20 times (integrated time at 180 ° C. was 13 hours).
  • the evaluation results are shown in Table 1.
  • the test sample of Comparative Example 4 was significantly deteriorated (brittle) and could not be measured when the above heating test was performed, it was determined that it was not subject to evaluation and the hardness measurement after the heating test was not performed. It was.
  • Test Example 3 Bending softness A test piece having a length of 38 mm and a width of 25 mm was cut out from a test sample of a masking material prepared in Examples and Comparative Examples, and the bending resistance was measured using a Gurley type tester specified in JIS L1096. Was measured. The measurement results are shown in Table 1.
  • Test Example 4 Measurement of breaking strength and breaking elongation A test piece having a length of 150 mm and a width of 15 mm was cut out from a test sample of a masking material prepared in Examples and Comparative Examples, and a universal tensile testing machine (Tensilon RTA manufactured by Orientec Co., Ltd.) -T-2M) was used to measure the breaking strength and breaking elongation according to JIS K7127: 1999. The measurement conditions were as follows. Test environment: 23 ° C, 50% RH ⁇ Tensile speed: 200 mm / min Measurement method: The load and elongation when the test sample broke were measured, and the breaking strength and breaking elongation were calculated based on these results.
  • Test Example 5 Dimensional stability A test piece having a diameter of 30 mm was cut out from the test sample of the masking material prepared in the example, and the vertical and horizontal dimensions were measured and then left in an environment of 180 ° C. for 40 minutes. Thereafter, a heating test in which a cycle of leaving for 40 minutes in an environment of 23 ° C. was repeated 10 times, the dimensions of the test piece after the heating test were also measured, and the dimensional change rate before and after the heating test (reference to the heating test) was obtained. The results are shown in Table 1.
  • the masking materials obtained in Examples 1 and 2 are excellent in mechanical properties such as bending resistance, and thus hardly cause problems during the attaching / detaching operation.
  • the heat resistance was excellent because the amount of deformation was small even after the heating test.
  • there is little change in hardness before and after the heating test and since the Shore D hardness is maintained below 40 even after heating, it is excellent in heat-resistant curability and can be used repeatedly.
  • the masking material of the present invention and the masking member provided with the same are suitably used for masking in painting work or plating work.

Landscapes

  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne un matériau de masquage, qui présente une résistance remarquable à la chaleur et peut être utilisé répétitivement, caractérisé en ce qu'il contient un caoutchouc acrylique avec une structure réticulée basée sur l'agent de réticulation amine et un corps magnétique et que le corps magnétique constitue entre 10 et 80 (inclusif) parties volumiques par rapport à 100 parties massiques du caoutchouc acrylique. Il est préférable que la dureté Shore du matériau de masquage soit entre 10 et 40 pour une durée cumulée de 13 heures dans un environnement à 180 °C. L'invention concerne aussi une méthode de fabrication du matériau de masquage, un élément de masquage fourni avec le matériau de masquage, une méthode de masquage utilisant l'élément de masquage, et une méthode de fabrication d'un élément revêtu.
PCT/JP2013/062437 2012-05-07 2013-04-26 Matériau de masquage, méthode de fabrication de matériau de masquage, élément de masquage, méthode de masquage et méthode de fabrication d'élément revêtu WO2013168616A1 (fr)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106068316A (zh) * 2014-03-07 2016-11-02 琳得科株式会社 加热固化型粘接剂组合物及加热固化型粘接片
WO2023166271A1 (fr) * 2022-03-04 2023-09-07 Jet Metal Technologies Procédé de fabrication d'articles tridimensionnels séléctivement métallisés avec une composition de revêtement de masquage
FR3133193A1 (fr) * 2022-03-04 2023-09-08 Jet Metal Technologies Composition pour la realisation de revetement de masquage pour la fabrication d’articles tridimensionnels a motif(s) metallique(s)

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JPS6362575A (ja) * 1986-09-01 1988-03-18 C I Kasei Co Ltd マスキング用磁石シ−ト
JP2001232252A (ja) * 2000-02-25 2001-08-28 Asahi Rubber Kk 鉄管塗工用のマスキング材
JP2004143573A (ja) * 2002-10-25 2004-05-20 Masakatsu Yanagida 非金属成形体表面の金属溶射膜処理方法
JP2006156423A (ja) * 2003-07-09 2006-06-15 Bridgestone Corp ゴム磁石シートおよびゴム磁石シートの製造方法
JP2009209268A (ja) * 2008-03-04 2009-09-17 Nippon Zeon Co Ltd アクリルゴム、架橋性アクリルゴム組成物およびその架橋物
JP2012076007A (ja) * 2010-09-30 2012-04-19 Lintec Corp マスキング材、マスキング材の製造方法およびマスキング方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6362575A (ja) * 1986-09-01 1988-03-18 C I Kasei Co Ltd マスキング用磁石シ−ト
JP2001232252A (ja) * 2000-02-25 2001-08-28 Asahi Rubber Kk 鉄管塗工用のマスキング材
JP2004143573A (ja) * 2002-10-25 2004-05-20 Masakatsu Yanagida 非金属成形体表面の金属溶射膜処理方法
JP2006156423A (ja) * 2003-07-09 2006-06-15 Bridgestone Corp ゴム磁石シートおよびゴム磁石シートの製造方法
JP2009209268A (ja) * 2008-03-04 2009-09-17 Nippon Zeon Co Ltd アクリルゴム、架橋性アクリルゴム組成物およびその架橋物
JP2012076007A (ja) * 2010-09-30 2012-04-19 Lintec Corp マスキング材、マスキング材の製造方法およびマスキング方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106068316A (zh) * 2014-03-07 2016-11-02 琳得科株式会社 加热固化型粘接剂组合物及加热固化型粘接片
WO2023166271A1 (fr) * 2022-03-04 2023-09-07 Jet Metal Technologies Procédé de fabrication d'articles tridimensionnels séléctivement métallisés avec une composition de revêtement de masquage
FR3133193A1 (fr) * 2022-03-04 2023-09-08 Jet Metal Technologies Composition pour la realisation de revetement de masquage pour la fabrication d’articles tridimensionnels a motif(s) metallique(s)

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