JP2019183094A - Tablet consisting of adhesive composition, manufacturing method therefor, and manufacturing method of member or component using the tablet - Google Patents

Abstract

To provide a tablet having excellent temporary tacking performance and consisting of an adhesive composition having excellent working environment property and component separation resistance, a manufacturing method therefor, and a manufacturing method of a member or a component using the tablet.SOLUTION: There are provided a tablet consisting of an adhesive composition containing a binder (A) containing at least a ceramic resin, and a plasticizer (B), and a manufacturing method of a tablet having a process for obtaining the adhesive composition by mixing the binder (A) containing at least the ceramic resin, and the plasticizer (B), a process for obtaining a tablet by compressing the adhesive composition, or a process for obtaining a melting mixture of the adhesive composition by melting and mixing these components, and a process for obtaining a solidified article by solidifying the melting mixture.SELECTED DRAWING: None

Description

  The present invention relates to a tablet comprising an adhesive composition, a method for producing the tablet, and a method for producing a member or a part using the tablet.

  Adhesives are various members or parts used in various applications such as home appliances, various electronic devices such as OA equipment, information equipment, home appliances, optical equipment such as optical lenses, medical equipment, and automotive equipment. It is used in various applications, such as various industrial applications such as manufacturing. It goes without saying that the performance originally required for adhesives is adhesive performance, but depending on the application, it exhibits adhesive performance when temporarily fixing various parts, and then exhibits peel performance when peeling. Performance (hereinafter, sometimes referred to as “temporary fixing performance”) may be required. For example, an optical lens is temporarily fixed to a support, and various mechanical processes such as cutting, polishing, cutting, and grinding are performed to obtain a predetermined shape and surface property, and then peeled from the support. The adhesive used in the production of the optical lens is required to have a temporary fixing performance.

  In addition, when performing mechanical processing such as cutting on a magnetic body such as a magnet, it is temporarily fixed to the support and mechanically processed to obtain a predetermined shape and surface properties, and then peeled off from the support. In order to produce, the adhesive used for such a use is also required to have a temporary fixing performance. In addition to mechanical processing of magnetic materials such as optical lenses and magnets, cutting, polishing, cutting and grinding of parts such as wafers and various parts formed of sapphire, gallium arsenide, quartz, metal, glass, resin, etc. In various mechanical processes such as the above, an adhesive having a temporary fixing performance (hereinafter sometimes referred to as “temporary adhesive”) may be desired.

  As the temporary fixing adhesive used in these mechanical processes, a solid type (for example, Patent Document 1) and a powder type (for example, Patent Document 2) have been mainly used. The adhesive described in Patent Document 1 is an adhesive made of a mixture of 60 to 80% by weight of shellac and 40 to 20% by weight of rosin, and the adhesive described in Patent Document 2 is mainly composed of shellac resin. A powder adhesive composition comprising: a resin powder; and at least one compound selected from predetermined benzoic acid esters, alkylbenzenesulfonamides and cyclic alcohol esters of maleic acid.

Japanese Unexamined Patent Publication No. 7-179842 JP 2007-254571 A

  By the way, while technological development related to the above-mentioned various devices is made thinner, smaller, lighter, etc., various parts used in these devices are required to be thinner, smaller, lighter, etc. Yes. In addition, the shapes of various parts are complicated, and for example, round bars, spheres, and other parts having an uneven surface are used. The component having such a shape has a very small adhesion area because the adhesion to the support is a point and adhesion at a line contact.

  Since the solid-type adhesive described in Patent Document 1 is used by being pressed onto a heated support and thermally melted and applied, the coating thickness tends to vary, and the adhesive When the film thickness varies, adhesion failure is likely to occur. Also, along with the downsizing and complication of the shape of various parts, for example, when bonding parts whose shape has an uneven surface, the adhesive does not reach the surface of the recess, resulting in poor adhesion and significant decrease in adhesion. Occurs. Although sufficient attention can be paid to the application of the adhesive to form a uniform film thickness of the adhesive, the work load is extremely large and the work efficiency is significantly reduced.

  The powder-type adhesive described in Patent Document 2 is usually used by being sprayed on a heated support, and it is easy to reduce variations in the thickness of the adhesive compared to a solid-type adhesive. It can be said that. However, along with the recent miniaturization and complication of various parts, even a powder adhesive has caused poor adhesion due to variations in film thickness. In addition, the powder adhesive is easily scattered during handling and the working environment is likely to deteriorate, and in order to prevent scattering, excessive fineness is required during spraying, so handling is easy. However, work efficiency is also reduced. Further, when a powder type adhesive is transported, for example, depending on conditions such as vibration and impact during transport, the separation of each component due to the difference in specific gravity of each component constituting the powder adhesive may occur. May occur. In this case, there arises a problem that the adhesiveness is lowered at a location where the component exhibiting the adhesive performance is small. However, in a situation where the adhesive area is small, the adhesion point can be a location where the component exhibiting the adhesive performance is small. In this case, the influence on the decrease in adhesive strength is enormous. Therefore, for example, component separation resistance that does not cause separation of components due to vibration, impact, etc. during conveyance is also required.

  The present invention has been made under such circumstances, and an object of the present invention is to provide a tablet having excellent work environment and component separation resistance as well as excellent temporary fixing performance.

  As a result of intensive studies to solve the above problems, the present inventor has found that the above problems can be solved by an invention having the following configuration.

1. A tablet comprising an adhesive composition containing a binder (A) containing at least a shellac resin and a plasticizer (B).
2. A method for producing a tablet comprising the steps of obtaining an adhesive composition by mixing a binder (A) containing at least a shellac resin and a plasticizer (B), and obtaining a tablet by tableting the adhesive composition .
3. A tablet having a step of melt-kneading a binder (A) containing at least a shellac resin and a plasticizer (B) to obtain a melt-kneaded product of an adhesive composition, and a step of solidifying the melt-kneaded product to obtain a solidified product Manufacturing method.
4). A member having a temporary fixing step of temporarily fixing a precursor of a member or component and a processing substrate using the tablet according to 1 above, and a processing step of mechanically processing the precursor to produce a member or a component or A manufacturing method for parts.

  ADVANTAGE OF THE INVENTION According to this invention, the tablet which has the outstanding work environment property and the component separation-proof property with the outstanding temporary fixability can be provided.

  Hereinafter, the tablet which consists of an adhesive composition of this invention and the manufacturing method of a tablet are demonstrated. In the present specification, the numerical values of the upper limit and the lower limit relating to the description of the numerical ranges in the above description can be arbitrarily combined, and the numerical values in the examples can be the upper limit and the lower limit. it can.

[Tablet made of adhesive composition]
The tablet of the present invention is a tablet comprising an adhesive composition containing at least a binder (A) containing a shellac resin and a plasticizer (B). In the present invention, when the adhesive composition is used as a tablet, a uniform film thickness can be obtained when the adhesive composition is used. Even a part with a very small area can be contacted with a sufficient amount of adhesive to obtain excellent adhesion to the adhesive surface. Even if it exists, since adhesive reaches the surface of this recessed part, the outstanding adhesiveness is acquired. Further, in the present invention, by using the adhesive composition as a tablet, it is possible to reduce the generation of dust during handling, so that an excellent working environment is obtained. Furthermore, the tablet of the present invention is in the form of a tablet, so that the binder (A) and the plasticizer (B) containing at least a shellac resin (hereinafter, the binder (A) and plasticizer constituting the adhesive composition). (B) etc. may be referred to as “(A) component”, “(B) component”, or simply “component” etc.), etc.) due to the difference in specific gravity of each component, etc. It has the component separation resistance which suppresses. As a result, stable temporary fixing performance can be obtained.

(tablet)
In the present invention, the “tablet made of an adhesive composition” is a solid form in which the adhesive composition has a fixed shape, and includes normal use (in addition to use as an adhesive, storage and transportation). .) Means that the certain shape can be maintained. Here, “can hold a certain shape” means that even if a defect occurs in a part thereof, it is 3% or less with respect to the total surface area of the tablet and about 5% or less with respect to the depth direction of the tablet. Strictly speaking, it may include an aspect that cannot be said to “can maintain a certain shape”, such as a slight defect.

  In the present invention, the crushing strength is preferably 3N (0.3 kgf) or more as the mechanical strength of the solid tablet. By having such a crushing strength, the adhesive composition can easily form tablets, the generation of dust during handling is reduced, and a better working environment can be obtained. In addition, powder generated by contact between tablets due to vibration, impact, etc. during conveyance can be reduced, so that shape stability (also referred to as dust resistance) as well as component separation resistance can be reduced. As a result, stable temporary fixing performance can be obtained. From the same viewpoint, the crushing strength of the tablet of the present invention is more preferably 10 N (1.0 kgf) or more, further preferably 15 N (1.5 kgf) or more, particularly preferably 20 N (2.0 kgf) or more. . The upper limit of the crushing strength is not particularly limited, but is about 100 N (10.2 kgf) or less in consideration of ease of manufacture and use. In the present specification, the crushing strength is an average value of crushing strength measured by the following method for any 10 tablets. More specifically, as a method for measuring the crushing strength, a hardness tester is used, and 10 tablets as test pieces are arbitrarily selected in an atmosphere of normal temperature and normal pressure, and a pressure plate is used at a constant speed for these test pieces. When a compressive load is applied by pressing, the maximum load that can be withstood by the test piece is measured, and this is taken as the crushing strength.

  The shape of the tablet of the present invention can be appropriately selected in consideration of the shape of various components and the like, and for example, a shape that can be exhibited by a pharmaceutical tablet can be employed. More specifically, a cylinder, an elliptical cylinder, a rectangular parallelepiped, a cube, a triangular prism, a lens shape, or a combination of these shapes, for example, a combination of a dome shape obtained by cutting the lens shape horizontally on the upper and lower horizontal surfaces of a cylindrical plate ( And a dome shape on the upper and lower surfaces of the cylindrical plate). Also, shapes other than the cylinder may be adopted in which the vertical horizontal plane is a dome shape.

As for the size of the tablet, the aspect ratio is preferably 1.0 or more and 6.0 or less. When the aspect ratio is within the above range, it is easy to obtain physical quality such as better crushing strength, more excellent working environment, and easier handling and use. Further, it is possible to reduce powder generated due to abrasion, chipping or the like due to contact between tablets due to vibration, impact, etc. during conveyance, and stable temporary fixing performance can be obtained.
From the same viewpoint, the aspect ratio is more preferably 1.1 or more, still more preferably 1.4 or more, particularly preferably 1.7 or more, and the upper limit is more preferably 4.0 or less, still more preferably. Is 3.0 or less, particularly preferably 2.5 or less. In the present invention, the aspect ratio is the ratio between the major axis and the minor axis of the tablet. More specifically, the length of the horizontal sectional shape of the tablet is the major axis, and the height of the vertical sectional shape of the tablet (tablet It is calculated as the ratio of the major axis to the minor axis when the (thickness) is the minor axis. Here, the length of the horizontal cross-sectional shape means that if the cross-sectional shape is a circle, the diameter thereof, if it is an ellipse, the long side thereof, and the other shape is the diameter of the circumscribed circle of the shape.

  As the size of the tablet, the length of the horizontal cross-sectional shape is preferably 2 mm or more and 25 mm or less. When the length of the horizontal cross-sectional shape is within the above range, it is easy to obtain better physical quality such as crushing strength, better working environment and long-term storage stability, and more easy handling and use. It becomes easy. From the same viewpoint, the length of the horizontal cross-sectional shape is more preferably 2.5 mm or more, further preferably 3 mm or more, particularly preferably 4 mm or more, and the upper limit is more preferably 20 mm or less, still more preferably 15 mm or less. Particularly preferably, it is 10 mm or less.

  The weight per tablet of the present invention may be appropriately adjusted as desired, and is not particularly limited, but is preferably 10 mg or more, more preferably 30 mg or more, still more preferably 50 mg or more, particularly preferably 100 mg. The upper limit is preferably 4000 mg or less, more preferably 1000 mg or less, still more preferably 500 mg or less, and particularly preferably 300 mg or less. When the weight per tablet is within the above range, handling and use become easier.

(Binder (A))
The adhesive composition used in the present invention contains a binder (A). The binder (A) contains at least a shellac resin, and exhibits the adhesiveness when temporarily fixing various parts to the tablet of the present invention, and exhibits the peelability when peeling thereafter. That is, it is a component that develops temporary fixing performance.
Shellac resin is obtained by purifying a resinous substance secreted by the shellworm by a known solution extraction method, soda method, etc., and the resin content is a resin acid such as alleuritic acid, jarlaric acid, laxialaric acid, etc. And natural shellac resin or synthetic shellac resin mainly composed of an ester compound. Specific examples include purified shellac resin, bleached shellac resin, and decolorized shellac resin. Among the above shellac resins, from the viewpoint of obtaining better temporary fixing performance, the thermosetting time is preferably 90 seconds or more at 170 ° C., more preferably 150 seconds or more, further preferably 200 seconds or more, Although there is no limit, what is about 600 seconds or less is preferable. In the present invention, the thermosetting time is a time measured according to the method for measuring the thermosetting time defined in JIS K5909-1994 for shellac resin, until the sample is heated on a hot plate to become rubbery. Indicates the time.

  The shellac resin contained in the binder (A) is preferably a powder, and the particle diameter thereof is preferably 0.1 μm or more, more preferably 10 μm or more, still more preferably 70 μm or more, and the upper limit is preferably 350 μm. Below, it is more preferably 300 μm or less, still more preferably 250 μm or less. When the shellac resin is a powder having the above particle diameter, it is easy to handle when it is made into a tablet, and it becomes easy to mold. In the present invention, the particle diameter can be measured using a commercially available apparatus such as a laser diffraction particle size distribution measuring apparatus (for example, “SALD-1000 (trade name)” (manufactured by Shimadzu Corporation)). .

In the present invention, as the binder (A), a resin that is soluble in a rosin resin, an organic solvent, or an alkaline solution can be used as a resin other than the shellac resin.
Examples of rosin resins include natural rosin such as gum rosin and wood rosin, rosin ester, hydrogenated rosin, hydrogenated rosin ester, polymerized rosin, polymerized rosin ester, maleic acid modified rosin, maleic acid modified rosin ester, rosin modified phenolic resin and the like. Resin. Examples of resins soluble in organic solvents or alkaline solutions include resins having a carboxyl group in the molecule, such as acrylic resins, methacrylic resins, polyester resins, and polycarbonate resins. Examples thereof include copolymer resins with resins. The resin having a carboxyl group in these molecules is preferably a resin having an acid value of 60 mgKOH / g or more, more preferably a resin having an acid value of 80 mgKOH / g or more, and still more preferably a resin having 100 mgKOH / g or more. Here, the organic solvent is not particularly limited as long as it is a known organic solvent, and examples thereof include lower alcohols (monohydric alcohols having 5 or less carbon atoms). Moreover, as an alkaline solution, the alkaline solution using a well-known organic alkali and an inorganic alkali is mentioned.
The softening point of these resins is preferably 70 ° C. or higher, more preferably 80 ° C. or higher, and the upper limit is preferably 180 ° C. or lower, more preferably 160 ° C., from the viewpoint of improving the temporary fixing performance, particularly adhesiveness. It is as follows. In this invention, a softening point is the value measured based on the softening point test method (ring ball method) prescribed | regulated to JISK2207: 2006.

  Further, the particle diameter of the other resin used in combination with the shellac resin may be within the preferable range of the particle diameter of the shellac resin, that is, preferably 0.1 μm or more, more preferably 10 μm or more, and still more preferably. Is 70 μm or more, and the upper limit is preferably 350 μm or less, more preferably 300 μm or less, and still more preferably 250 μm or less.

  In the present invention, the binder (A) may be a shellac resin alone or a combination of a shellac resin and another resin, and may be determined according to desired performance. The content of the shellac resin in the binder (A) is preferably 40% by mass or more, more preferably 60% by mass or more. From the viewpoint of obtaining better temporary fixing performance, particularly adhesiveness, the content of shellac resin in the binder (A) is preferably as large as possible, and the upper limit may be 95% by mass or less, but 100% by mass, That is, the binder (A) is preferably a shellac resin only.

(Plasticizer (B))
The adhesive composition used in the present invention contains a plasticizer (B). The plasticizer (B) is a component capable of imparting better temporary fixing performance to the binder (A). The plasticizer (B) is not particularly limited as long as it has the property of imparting plasticity. For example, phthalic acid esters, sulfonic acid amides, phosphoric acid esters, benzoic acid esters, higher fatty acids, higher alcohols and the like are preferable. These can be used alone or in combination of two or more. Here, carbon number of higher fatty acid becomes like this. Preferably it is 12 or more, More preferably, it is 14 or more, More preferably, it is 16 or more. The carbon number of the higher alcohol is preferably 12 or more, more preferably 14 or more, and still more preferably 16 or more.

  More specific examples of the plasticizer (B) include phthalic acid esters such as dicyclohexyl phthalate, diethylhexyl phthalate, dihydroabiethyl phthalate, and dimethyl isophthalate. Examples of the sulfonamide include toluene sulfone. Examples include amide, ethyltoluenesulfonamide, cyclohexyltoluenesulfonamide, etc., phosphate esters include triphenyl phosphate, tricresyl phosphate, etc., and benzoate esters include sucrose benzoate, ethylene glycol dibenzoate. , Tribenzoyl glyceride, pentaerythritol tetrabenzoate, trimethylolpropane tribenzoate, etc., and higher fatty acids include myristic acid, palmitic acid, stearic acid, behenic acid, etc. The Le, stearyl alcohol, behenyl alcohol and the like. Among these, solid plasticizers such as dicyclohexyl phthalate and triphenyl phosphate are preferred.

  The plasticizer (B) is preferably a powder made of the above material, and the particle size is preferably a range of the above-mentioned shellac resin particle size (that is, a preferable range of the particle size of the binder (A)). More specifically, it is preferably 0.1 μm or more, more preferably 10 μm or more, further preferably 70 μm or more, and the upper limit is preferably 350 μm or less, more preferably 300 μm or less, and further preferably 250 μm or less.

  The content of the plasticizer (B) is preferably 5 parts by mass, more preferably 8 parts by mass or more, still more preferably 10 parts by mass or more, and particularly preferably 15 parts by mass with respect to 100 parts by mass of the binder (A). The upper limit is preferably 100 parts by mass or less, more preferably 60 parts by mass or less, still more preferably 40 parts by mass or less, and particularly preferably 25 parts by mass or less. When the content of the plasticizer (B) is within the above range, it is possible to impart better temporary fixing performance to the binder (A).

(Auxiliary agent (C))
The adhesive composition used in the present invention preferably contains at least one selected from an inorganic compound and a crosslinkable resin as an auxiliary agent (C). Adhesive improvement effect due to formation of uniform film thickness of adhesive composition by auxiliary agent (C), and adhesion to industrial cutters such as diamond cutters used in various mechanical processing such as cutting and polishing The effect which suppresses adhesion of an agent is acquired.

  Inorganic compounds employed as the auxiliary agent (C) include inorganic carbonates such as calcium carbonate and magnesium carbonate; inorganic sulfates such as barium sulfate, magnesium sulfate and calcium sulfate; aluminum oxide (alumina), silicon oxide (silica) In addition, inorganic oxides such as titanium oxide (titania), magnesium oxide, and zinc oxide, and other aluminum silicates, aluminum hydroxides, and the like can be given, and these powders are preferable. Among the above-mentioned inorganic compounds, inorganic sulfates and inorganic oxides are preferable, among which barium sulfate and silicon oxide (silica) are preferable, and barium sulfate and silicon oxide (silica) are more preferably used in combination. Moreover, in this invention, the said inorganic compound can be used individually or in combination of multiple types as auxiliary agent (C).

  Preferred examples of the crosslinkable resin employed as the auxiliary agent (C) include a crosslinked acrylic resin, a crosslinked phenol resin, a crosslinked epoxy resin, a crosslinked urea resin, and a crosslinked melamine resin, and these powders are preferable. In the present invention, the above-mentioned crosslinkable resin can be used alone or in combination as an auxiliary agent (C), and the above inorganic compound and crosslinkable resin can also be used in combination.

  When the auxiliary agent (C) is a powder of the above-mentioned inorganic compound or crosslinkable resin, the particle size thereof is preferably a range of the particle size of the shellac resin (that is, a preferable range of the particle size of the binder (A)). In other words, it is preferably 0.1 μm or more, more preferably 1 μm or more, and the upper limit is preferably 100 μm or less, more preferably 50 μm or less.

  The content of the auxiliary agent (C) is preferably 30 parts by mass, more preferably 60 parts by mass or more, still more preferably 90 parts by mass or more, particularly preferably 100 parts by mass with respect to 100 parts by mass of the binder (A). The upper limit is preferably 200 parts by mass or less, more preferably 160 parts by mass or less, still more preferably 145 parts by mass or less, and particularly preferably 135 parts by mass or less. When the content of the auxiliary agent (C) is within the above range, the effect of improving the temporary fixing performance by the binder (A), the effect of forming a uniform film thickness by the auxiliary agent (C), and the adhesion of the adhesive are suppressed. The effect to do is obtained with good balance, and more excellent temporary fixing performance is obtained.

  Among the above inorganic compounds, when silicon oxide (silica) is used, when the tablet of the present invention is obtained by tableting, the fluidity of the adhesive composition is improved, so that the handling becomes easier and the tablet is produced. The efficiency is improved and an effect of increasing the hardness of the tablet is obtained. When silicon oxide (silica) is used as the auxiliary agent (C), the content of silicon oxide (silica) is based on 100 parts by mass of the binder (A) from the viewpoint of improving the fluidity of the adhesive composition. The upper limit is preferably 5 parts by mass or less, more preferably 4.5 parts by mass or less, preferably 0.1 parts by mass or more, more preferably 0.5 parts by mass or more, still more preferably 1.0 parts by mass or more. More preferably, it is 4.0 parts by mass or less. In the present invention, silicon oxide (silica) can be used alone, and in this case, it may be used within the range described as the content of the auxiliary agent (C). Further, when barium sulfate and silicon oxide (silica), which are particularly preferable as the auxiliary agent (C), are used in combination, the silicon oxide (silica) is used within the range described as the content of the silicon oxide (silica). What is necessary is just to use so that the total amount with a silicon oxide (silica) may become in the range described as content of the said adjuvant (C).

(Lubricant (D))
The adhesive composition used in the present invention preferably contains a lubricant (D). When a tablet is obtained by tableting the adhesive composition, capping in which the upper side of the tablet is peeled off when demolding after tableting, and the adhesive composition adheres to the upper eyelid during tableting. Due to poor separation, a part of the tablet may adhere to the upper eyelid, resulting in sticking that may damage the surface of the tablet. In the present invention, by using the lubricant (D), the occurrence of capping and sticking is suppressed, and the tablet made of the adhesive composition can be more efficiently produced, thereby improving the tablet production efficiency.

  As the lubricant (D), those generally used as a lubricant during tablet production can be used without any particular limitation. For example, natural lubricants such as talc, hardened rapeseed oil, beeswax and the like, and fatty acid metal salts , Polyalkylene glycol, polyglycerin fatty acid ester, sucrose fatty acid ester, etc., among which fatty acid metal salt, polyalkylene glycol, polyglycerin fatty acid ester are preferred, fatty acid metal salt, polyalkylene glycol are more preferred, especially fatty acid metal salt Is preferred. In this invention, as a lubricant (D), the said lubricant can be used individually or in combination of multiple types.

  The aliphatic metal salt preferably has a carbon number of 8 or more, more preferably 12 or more, still more preferably 16 or more, and the upper limit is preferably 28 or less, more preferably 24 or less, still more preferably 20 or less. Preferred examples include fatty acid metal salts composed of unsaturated fatty acids and metals such as magnesium, calcium, zinc, aluminum, barium, lithium, strontium, lead, sodium and potassium. Among the above metals, magnesium, calcium, zinc, aluminum, barium, and lithium are preferable in consideration of the effect as a lubricant, availability, and the like.

  Specific examples of the aliphatic metal salt preferably used as the lubricant (D) in the present invention include caprylic acid such as magnesium caprylate, calcium caprylate, zinc caprylate, aluminum caprylate, barium caprylate and lithium caprylate. Metal salts: Magnesium laurate, calcium laurate, zinc laurate, aluminum laurate, barium laurate, lithium laurate, etc .; Magnesium myristate, calcium myristate, zinc myristate, aluminum myristate, myristic acid Metal salts of myristic acid such as barium and lithium myristate; such as magnesium palmitate, calcium palmitate, zinc palmitate, aluminum palmitate, barium palmitate, lithium palmitate, etc. Luminate metal salt; metal stearate such as magnesium stearate, calcium stearate, zinc stearate, aluminum stearate, barium stearate, lithium stearate; magnesium oleate, calcium oleate, zinc oleate, aluminum oleate, Metal oleate such as barium oleate and lithium oleate; metal behenate such as magnesium behenate, calcium behenate, zinc behenate, aluminum behenate, barium behenate, lithium behenate; magnesium montanate, montanic acid Examples include metal salts of montanic acid such as calcium, zinc montanate, aluminum montanate, barium montanate, and lithium montanate. These may be used alone or in combination. It can be. Among these, metal stearate salts such as magnesium stearate, calcium stearate, zinc stearate, aluminum stearate, barium stearate, lithium stearate and the like are preferable from the viewpoint of obtaining a more excellent effect of the lubricant.

Examples of the polyalkylene glycol include polyethylene glycol, polypropylene glycol, random polymers and block polymers thereof, and the mass average molecular weight is preferably 1,500 or more, more preferably 2,000 or more, and still more preferably 5. The upper limit is preferably 100,000 or less, more preferably 50,000 or less, and still more preferably 25,000 or less. In this specification, “mass average molecular weight” refers to a molecular weight in terms of polystyrene determined by gel permeation chromatography (GPC) measurement.
The polyglycerol fatty acid ester is preferably a polyglycerol ester of a saturated or unsaturated fatty acid having 12 to 18 carbon atoms, such as polyglycerol laurate, polyglycerol myristate, polyglycerol palmitate, polyglycerol stearate, Polyglycerol oleate, polyglycerol linoleate, and the like can be used.

  The content of the lubricant (D) is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and further preferably 1.0% by mass or more, based on the total amount of the composition. Preferably it is 5 mass% or less, More preferably, it is 4.0 mass% or less, More preferably, it is 3.5 mass% or less. Generation | occurrence | production of capping and sticking can be suppressed more as content of a lubricant (D) is in the said range, and the production efficiency of the tablet which consists of an adhesive composition improves.

  The tablet of the present invention is not particularly limited as long as it is composed of the above-mentioned adhesive composition. For example, it is an aggregate of powder composed of the above-mentioned adhesive composition, or a melt-kneaded product of the above-mentioned adhesive composition. It is preferable. The powdered agglomerate tablet comprising the above-mentioned adhesive composition can be produced, for example, by agglomerating the powdered adhesive composition by compression molding or the like. It can be produced by tableting the body adhesive composition. Moreover, the tablet of the melt-kneaded material of the said adhesive composition can be manufactured by melt-kneading each component which comprises an adhesive composition, and solidifying. The method for producing these tablets will be described in detail as a method for producing tablets.

(Use of tablets made of adhesive composition)
The tablet comprising the adhesive composition of the present invention has excellent workability and component separation resistance as well as excellent temporary fixing performance. Therefore, the tablet comprising the adhesive composition of the present invention is used in applications requiring temporary fixing performance as an adhesive, for example, various electronic devices such as OA equipment, information equipment, home appliances, optical equipment such as optical lenses, medical equipment, etc. Members or parts used in various equipment such as industrial equipment, automotive equipment, etc., for example, wafers such as silicon wafers, various mechanical processing such as cutting, polishing, grinding and cutting of optical lenses, etc., and magnetic materials such as magnets , Sapphire, gallium arsenide, quartz, metal, glass, resin, etc., and is suitably used for primary fixing (temporary fixing) during mechanical processing of various members or parts.

As a typical example of the method of using the tablet comprising the adhesive composition of the present invention, the method of using the magnetic material in cutting will be described.
First, a predetermined number of tablets comprising the adhesive composition of the present invention are placed on a surface plate, and the surface plate is usually 60 ° C. or higher, preferably 70 ° C. or higher, and the upper limit is usually 180 ° C. or lower, preferably 160 ° C. Hereinafter, the tablet is softened or melted more preferably by heating to 150 ° C. or lower, and the magnetic body and the surface plate are heat-pressed to fix the magnetic body on the surface plate. Note that hot air may be supplied simultaneously with heating the platen, and tablets may be placed on the platen after the platen is heated.
Next, the magnetic body is cut by a cutting machine. What is necessary is just to peel a magnetic body from the surface plate of a cutting machine using alkaline solution after completion | finish of a cutting process.

  The tablet comprising the adhesive composition of the present invention exhibits an adhesive performance in which the magnetic material does not peel off from the surface plate during the cutting process, and after the cutting process is finished, the magnetic material is subjected to a surface plate using an alkaline solution or the like. It has a peeling performance that can be easily peeled off. In addition, the tablet comprising the adhesive composition of the present invention does not need to be hand-coated like a solid type or use a hot melt applicator when forming a film, and is uniform like a powder type. It does not require time and effort for spraying, and an adhesive film can be formed simply by placing it on a surface plate, and excellent temporary fixing performance can be obtained. Furthermore, since it is very easy to form an adhesive film, it is possible to meet the demand for fully automatic operation in the mechanical processing of various parts in the future.

[Method for producing tablets]
The tablet production method of the present invention comprises a step of mixing at least a shellac resin-containing binder (A) and a plasticizer (B) to obtain an adhesive composition, and tableting the adhesive composition to produce a tablet. It has the process of obtaining. The adhesive composition containing the binder (A) and plasticizer (B) containing at least a shellac resin, the other auxiliary agent (C), and the lubricant (D) used in the method for producing a tablet of the present invention is the above-mentioned book. This is the same as that described as the adhesive composition of the invention.

(mixture)
The binder (A) containing at least a shellac resin and the plasticizer (B) may be mixed using a known powder mixer, and it is preferable to mix them sufficiently until they are uniformly dispersed. Moreover, what is necessary is just to mix these components together, when using an adjuvant (C) and a lubricant (D). There is no limitation on the order of charging the binder (A), plasticizer (B), auxiliary agent (C) and lubricant (D) into the powder mixer, and all the components may be charged simultaneously. After adding the binder (A), the plasticizer (B) and other components may be added in order or at the same time and mixed.

  Further, before or after the mixing, in order to uniform the particle diameters of the components or the adhesive composition, sieving may be performed using a sieve or the like. By sieving, a more uniform tablet without uneven distribution of each component is obtained, so that the temporary fixing performance is improved. For example, when obtaining an adhesive composition powder having an average particle diameter of 0.1 μm or more and 350 μm or less, sieving is performed using a sieve having a mesh corresponding to an upper limit (350 μm) particle diameter. Good. In addition, what is necessary is just to use the metal woven net etc. based on JISZ8801-1: 2006 as a sieve.

(Tablet)
The powdery adhesive composition obtained by the above mixing is tableted to obtain a tablet comprising the adhesive composition. For tableting, a device having a mechanism capable of filling an adhesive composition of a powder into a stationary mold, compressing, and releasing, such as a single-punch tableting machine, a multistage tableting machine (for example, two-stage compression) A known tableting machine such as a mold tableting machine, a rotary tableting machine, and a multistage and rotary tableting machine may be used.
The tablet obtained by the above mixing and tableting corresponds to an agglomerate of powder composed of the above adhesive composition.

The tablet production method of the present invention includes a step of melt-kneading a binder (A) containing at least a shellac resin and a plasticizer (B) to obtain a melt-kneaded product of an adhesive composition, and the melt-kneaded product. It has a step of solidifying to obtain a solidified product.
The melt kneading of the binder (A) containing at least a shellac resin and the plasticizer (B) is, for example, preferably 90 ° C. or higher, more preferably 100 ° C. or higher, and the upper limit is preferably 160 ° C. or lower, more preferably 150 ° C. or lower. More preferably, it has a property that it can be melted at a temperature of 140 ° C. or less, preferably 3 minutes or more, more preferably 5 minutes or more, and the upper limit is preferably 1 hour or less, more preferably 30 minutes or less. While melting the component (mainly binder (A)), other components can be kneaded and kneaded. More specifically, for example, a batch kneader, a single-screw extruder having a kneading function, a twin-screw extruder, or a three-roll kneader can be used under the above temperature and time conditions. .

Solidification of the melt-kneaded product of the adhesive composition containing at least the binder (A) containing the shellac resin and the plasticizer (B) obtained by the melt-kneading is performed in, for example, a mold corresponding to the desired tablet shape. The melt-kneaded product is poured into the product, cooled to room temperature and solidified to obtain a solidified product, which may be used as it is as a tablet, or not in a shape corresponding to the desired tablet shape, for example, in a rectangular parallelepiped mold. The melt-kneaded product is poured, cooled to room temperature and solidified to obtain a solidified product, and the obtained solidified product may be punched into a desired tablet shape to form a tablet.
The tablet obtained by the mixing, melt-kneading, and solidification corresponds to the melt-kneaded product of the adhesive composition.

[Manufacturing method of member or part]
The member or component manufacturing method of the present invention includes a temporary fixing step of temporarily fixing a member or component precursor and a processing substrate using a tablet made of the adhesive composition of the present invention, and a machine for the precursor. It is characterized by having a processing step of producing a member or a part by subjecting to a general processing.

The temporary fixing step is a step of temporarily fixing the precursor of the member or part and the processing substrate using the tablet of the present invention, and more specifically, the tablet of the present invention between the precursor and the processing substrate. Is a step of temporarily fixing the precursor and the substrate. As a method for forming a coating film, a tablet is placed on a processing substrate such as a platen, and the processing substrate is usually 60 ° C. or higher, preferably 70 ° C. or higher, and the upper limit is usually 180 ° C. or lower, preferably 160 ° C. or lower. More preferably, a method of forming a coating film by heating to 150 ° C. or lower and softening or processing and melting the tablet can be mentioned. After forming the coating film, by placing the precursor on the coating film, the precursor can be temporarily fixed to the processing substrate via the coating film. The precursor may be roughened with a polishing agent or the like before being temporarily fixed to the processing substrate, and surface treatment may be performed by chemical etching as necessary.
Further, hot air may be supplied simultaneously with heating the processing substrate, and the tablet may be placed on the platen after the platen is heated.

  The processing step is a step of processing the processed surface of the precursor temporarily fixed to the processing substrate in the temporary fixing step. Examples of the processing in the production method of the present invention include various mechanical processing such as cutting, polishing, cutting, grinding, drilling and the like, and may be processing alone or a combination of these processing.

  The processing in the processing step of the manufacturing method of the present invention is roughly classified into general processing that does not require special precision and precision processing that requires high precision. For example, mechanical processing of a wafer such as a silicon wafer, an optical lens, and a semiconductor device member, for example, polishing of the surface of a wafer such as a silicon wafer, requires processing by precision processing. In the production method of the present invention, since the tablet of the present invention having excellent temporary fixing performance is used, it can be temporarily fixed to the processing substrate without inclining the precursor, and the coating film of the adhesive can be used. The in-plane film thickness difference is small, and the non-contact area is very small. For this reason, in the processing step, the pressure applied to the precursor from the jig for mechanical processing can be made substantially uniform with respect to the surface to be processed of the precursor. As a result, since the precursor can be processed with high accuracy, a high-quality member or component can be manufactured.

  The manufacturing method of the member or component of this invention may have the peeling process which peels the member or component in which the mechanical processing was given after the said process process from the board | substrate for a process. For peeling, for example, the member or component may be peeled from the processing substrate using an alkaline solution or the like, using a razor, a scraper, or the like, or by heating and melting.

  Examples of members and parts obtained by the member or part manufacturing method of the present invention include various electronic devices such as OA equipment, information equipment, home appliances, optical equipment such as optical lenses, medical equipment, automotive equipment, and the like. Members or parts used in various devices, such as wafers such as silicon wafers, optical lenses, etc., various members formed of magnetic materials such as magnets, sapphire, gallium arsenide, crystal, metal, glass, resin, etc. Parts.

  EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not limited at all by this example.

(Evaluation and measurement method)
(1) Measurement of crushing strength Ten samples obtained in each Example and Comparative Example 1 were arbitrarily selected, and a tablet was broken by applying a compression pressure from the height direction using a hardness meter. The compression pressure was measured, and the average value of the crushing strength measured for 10 tablets was taken as the crushing strength of the tablet of each example.
(2) Evaluation of adhesiveness Samples obtained in each Example and Comparative Example 1 were powdered, and the powder of Comparative Example 2 was sprayed uniformly on a stainless steel substrate and heated at 120 to 130 ° C. After being melted, it is bonded to the other stainless steel substrate, cooled to room temperature, and then the shearing force of the bonded substrate is determined according to JIS K6850: 1999 “Tensile shear bond strength test method”. It measured using the measuring device and evaluated on the following references | standards. In this example, it was determined to be acceptable if it was B or higher.
A: The shearing force was 5 MPa or more.
B: The shearing force was 1 MPa or more and less than 5 MPa.
C: Shear force was less than 1 MPa.
(3) Evaluation of the uniformity of the coating film The sample obtained in each Example and Comparative Example 1 and the powder of Comparative Example 2 were each sandwiched between glass plates, heated and melted at 150 ° C., and then pressed from above. The uniformity of (adhesive layer) was visually observed and evaluated according to the following criteria. In this example, it was determined to be acceptable if it was B or higher.
A: The coating film was uniform overall.
B: The coating film had color shading (unevenness).
C: It was a coating film with a space between glass plates.
(4) Evaluation of component separation resistance 100 samples selected in each Example and Comparative Example 1 were selected arbitrarily, and 10 g of the powder of Comparative Example 2 was put into a 30 ml glass bottle, and lightly tapped 100 times from the side. The separation state of the adhesive composition when vibration was applied was evaluated according to the following criteria. In this example, it was determined to be acceptable if it was B or higher.
A: The form of the adhesive composition before vibration was maintained, and no separation occurred.
B: Although there was some change in the form of the adhesive composition, no separation occurred.
C: Separation of the components of the adhesive composition occurred.
(5) Evaluation of work environment property About the generation | occurrence | production and scattering of the dust etc. at the time of mounting the sample obtained in each Example and Comparative Example 1, and the powder obtained in Comparative Example 2 on a glass plate, it evaluates on the following references | standards. did. In this example, it was determined to be acceptable if it was B or higher.
A: Dust was not generated at all.
B: Dust was hardly generated and the working environment was not deteriorated.
C: Dust was generated and the working environment was significantly deteriorated.
(6) Evaluation of dust resistance About 30 occurrences of the samples obtained in each Example and Comparative Example 1, arbitrarily selected, put into a 30 ml glass bottle and shaken 30 times left and right, the following Evaluation based on the criteria. In this example, it was determined to be acceptable if it was B or higher.
A: Powdering did not occur.
B: Although pulverization occurred a little, the tablet did not crack.
C: Tablet cracking and / or many powdering occurred.
(7) Tableting performance 1 (Evaluation of fluidity of adhesive composition)
About the fluidity | liquidity at the time of pouring the adhesive composition prepared in each Example and the comparative example 1 in the metal mold | die of a tableting machine, it evaluated on the following references | standards. In this example, it was determined to be acceptable if it was B or higher.
A: It was possible to pour into the mold without any delay.
B: Although there was a slight delay, there was no practical problem.
C: It was difficult to pour into the mold.
(8) Tableting performance 2 (capping evaluation)
Occurrence of capping of tablets when the adhesive composition prepared in each Example and Comparative Example 1 was tableted with a tableting machine (problem in which the upper heel side of the tablet peels off when demolding after tableting) Were evaluated according to the following criteria. In this example, it was determined to be acceptable if it was B or higher.
A: Capping occurred when less than 3 pieces out of 100 pieces.
B: Capping occurred at 3 to less than 10 out of 100.
C: Capping occurred at 10 or more out of 100.
(9) Tableting performance 3 (Evaluation of sticking)
Sticking of tablets when the adhesive composition prepared in each Example and Comparative Example 1 was tableted with a tableting machine (the adhesive composition adhered to the upper punch during tableting, and the separation of the punches was poor. The occurrence of the problem that a part of the tablet adheres to the upper eyelid and scratches the surface of the tablet) was evaluated according to the following criteria. In this example, it was determined to be acceptable if it was B or higher.
A: Sticking occurred in less than 3 out of 100.
B: Sticking occurred at 3 to less than 10 out of 100.
C: Sticking occurred in 10 or more of 100 pieces.

Examples 1 to 10, Comparative Examples 1 and 2
Each component is mixed in the blending amount (% by mass) shown in Table 1 to prepare a powdery adhesive composition, and the size (diameter, thickness and mass) shown in Table 1 using a tableting machine. A tablet made of the adhesive composition was prepared. The shape of the tablet was a shape obtained by combining a dome shape obtained by cutting the lens shape in the horizontal direction on the upper and lower horizontal surfaces of the cylindrical plate (the upper and lower surfaces of the cylindrical plate were formed into a dome shape). About the obtained sample, crushing strength was measured by the method of said (1), and various performance was evaluated by the method of said (2)-(9). The evaluation results are shown in Table 1.

Comparative Example 2
Each component was mixed by the compounding quantity (mass%) shown in Table 1, and the adhesive composition of the powder was prepared. About the obtained adhesive composition, various performance was evaluated by the method of said (2)-(5). The evaluation results are shown in Table 1. Since Comparative Example 2 is a powdery adhesive composition, evaluations on the adhesive compositions of the tablets (6) to (9) were not performed.

* 1, Content based on 100 parts by mass of binder (A).
I) Details of each component shown in Table 1 used in this example are as follows.
Binder (A): shellac resin powder (thermosetting time (170 ° C.): 200 seconds)
・ Plasticizer (B): Dicyclohexyl phthalate ・ Auxiliary agent 1 (C): Fertile barium sulfate powder (particle size: 0.1 to 200 μm, average particle size: 15 μm)
Auxiliary agent 2 (C): silica powder (particle size: 0.1 to 10 μm, average particle size: 4 μm)
-Lubricant 1 (D): Magnesium stearate-Lubricant 2 (D): Polyethylene glycol * 2, which was in the form of a tablet immediately after being tableted by a tableting machine, but was broken by shaking etc. The shape change due to powdering occurred, and the characteristics as a tablet were not retained.

From the results of the examples, the tablet made of the adhesive composition of the present invention has excellent adhesiveness, and since both can be easily peeled, it has both excellent adhesiveness and peelability. It was found that it has a temporary fixing performance. The tablet of the present invention has excellent coating film uniformity, and this coating film uniformity is considered to contribute to the excellent adhesion. In addition to having the above-mentioned effects, the tablet has a predetermined crushing strength, so that it is confirmed that the tablet is excellent in work environment and powder resistance (shape stability). Stop performance is obtained.
On the other hand, the tablet made of the adhesive composition of Comparative Example 1 was in the form of a tablet immediately after being tableted by a tableting machine, but because the tablet was cracked due to shaking or the like, the shape was changed due to powdering. It cannot be said that the above characteristics are retained. Further, since the adhesive composition of the powder of Comparative Example 2 is a powder, it cannot be said that the adhesive composition is scattered during the operation, and the working environment is excellent, and also the component separation resistance is excellent. It could not be said to be excellent.

  Since the tablet comprising the adhesive composition of the present invention has excellent temporary fixing performance and excellent work environment and component separation resistance, it is required to have temporary fixing performance as an adhesive, for example, Various electronic devices such as OA equipment, information equipment, home appliances, optical equipment such as optical lenses, members or parts used in various equipment such as medical equipment, automotive equipment, for example, wafers such as silicon wafers, optical lenses Various mechanical processing such as cutting, polishing, grinding, cutting, etc., and mechanical processing of various members or parts formed of magnetic materials such as magnets, sapphire, gallium arsenide, crystal, metal, glass, resin, etc. It is preferably used for primary fixing (temporary fixing).

Claims (23)

  A tablet comprising an adhesive composition containing a binder (A) containing at least a shellac resin and a plasticizer (B).   The tablet according to claim 1, wherein the crushing strength is 3N or more.   The tablet according to claim 1 or 2, wherein the aspect ratio is 1.0 or more and 6.0 or less.   The tablet according to any one of claims 1 to 3, wherein the length of the horizontal cross-sectional shape is 2 mm or more and 25 mm or less.   The tablet according to any one of claims 1 to 4, which is an agglomerate of powder composed of the adhesive composition or a melt-kneaded product of the adhesive composition.   The tablet according to any one of claims 1 to 5, wherein the binder (A) contains a rosin resin and a resin having a carboxyl group in the molecule.   The tablet according to any one of claims 1 to 6, wherein a content of the shellac resin contained in the binder (A) is 40% by mass or more and 100% by mass or less.   The plasticizer (B) is at least one selected from phthalic acid esters, sulfonic acid amides, phosphoric acid esters, benzoic acid esters, higher fatty acids having 12 or more carbon atoms, and higher alcohols having 12 or more carbon atoms. 8. The tablet according to any one of 7 above.   The tablet according to any one of claims 1 to 8, wherein the adhesive composition further contains at least one auxiliary agent (C) selected from an inorganic compound and a crosslinkable resin.   The tablet according to claim 9, wherein the auxiliary agent (C) is at least one inorganic powder selected from inorganic carbonates, inorganic sulfates and inorganic oxides.   The tablet according to claim 9 or 10, wherein the auxiliary (C) is a barium sulfate powder and a silica powder.   The said auxiliary agent (C) is at least 1 type chosen from crosslinked acrylic resin powder, crosslinked phenol resin powder, crosslinked epoxy resin powder, crosslinked urea resin powder, and crosslinked melamine resin powder. The tablet according to any one of the above.   The tablet according to any one of claims 1 to 12, wherein the adhesive composition further contains a lubricant (D).   The tablet according to claim 13, wherein the lubricant (D) is at least one selected from fatty acid metal salts and polyalkylene glycols.   The tablet according to claim 14, wherein the fatty acid metal salt is at least one selected from magnesium stearate, calcium stearate, zinc stearate, aluminum stearate, barium stearate and lithium stearate.   The tablet according to any one of claims 1 to 15, wherein a content of the plasticizer (B) with respect to 100 parts by mass of the binder (A) is 5 parts by mass or more and 100 parts by mass or less.   The tablet according to any one of claims 9 to 16, wherein the content of the auxiliary agent (C) with respect to 100 parts by mass of the binder (A) is 30 parts by mass or more and 200 parts by mass or less.   The tablet according to any one of claims 13 to 17, wherein a content of the lubricant (D) based on the total composition is 0.1% by mass or more and 5% by mass or less.   A method for producing a tablet comprising the steps of obtaining an adhesive composition by mixing a binder (A) containing at least a shellac resin and a plasticizer (B), and obtaining a tablet by tableting the adhesive composition .   A tablet having a step of melt-kneading a binder (A) containing at least a shellac resin and a plasticizer (B) to obtain a melt-kneaded product of an adhesive composition, and a step of solidifying the melt-kneaded product to obtain a solidified product Manufacturing method.   The tablet manufacturing method according to claim 19 or 20, wherein the adhesive composition further contains at least one auxiliary agent (C) selected from an inorganic compound and a crosslinkable resin.   The method for producing a tablet according to any one of claims 19 to 21, wherein the adhesive composition further contains a lubricant (D).   A temporary fixing step for temporarily fixing a member or component precursor and a processing substrate using the tablet according to any one of claims 1 to 18, and mechanically processing the precursor to form a member or component. A method for manufacturing a member or component having a manufacturing process to be manufactured.