WO2018003381A1 - 紫外線硬化性シリコーン組成物及びその硬化物 - Google Patents
紫外線硬化性シリコーン組成物及びその硬化物 Download PDFInfo
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- WO2018003381A1 WO2018003381A1 PCT/JP2017/020183 JP2017020183W WO2018003381A1 WO 2018003381 A1 WO2018003381 A1 WO 2018003381A1 JP 2017020183 W JP2017020183 W JP 2017020183W WO 2018003381 A1 WO2018003381 A1 WO 2018003381A1
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- ultraviolet curable
- curable silicone
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- 229920001296 polysiloxane Polymers 0.000 title claims abstract description 60
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- 230000001678 irradiating effect Effects 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
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- 238000000034 method Methods 0.000 description 2
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
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- QNODIIQQMGDSEF-UHFFFAOYSA-N (1-hydroxycyclohexyl)-phenylmethanone Chemical compound C=1C=CC=CC=1C(=O)C1(O)CCCCC1 QNODIIQQMGDSEF-UHFFFAOYSA-N 0.000 description 1
- MYWOJODOMFBVCB-UHFFFAOYSA-N 1,2,6-trimethylphenanthrene Chemical compound CC1=CC=C2C3=CC(C)=CC=C3C=CC2=C1C MYWOJODOMFBVCB-UHFFFAOYSA-N 0.000 description 1
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- MQDJYUACMFCOFT-UHFFFAOYSA-N bis[2-(1-hydroxycyclohexyl)phenyl]methanone Chemical compound C=1C=CC=C(C(=O)C=2C(=CC=CC=2)C2(O)CCCCC2)C=1C1(O)CCCCC1 MQDJYUACMFCOFT-UHFFFAOYSA-N 0.000 description 1
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- VBJHDYCFGAXWDN-UHFFFAOYSA-N decane prop-2-enoic acid Chemical compound OC(=O)C=C.OC(=O)C=C.CCCCCCCCCC VBJHDYCFGAXWDN-UHFFFAOYSA-N 0.000 description 1
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- HTDJPCNNEPUOOQ-UHFFFAOYSA-N hexamethylcyclotrisiloxane Chemical compound C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O1 HTDJPCNNEPUOOQ-UHFFFAOYSA-N 0.000 description 1
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- 229910001507 metal halide Inorganic materials 0.000 description 1
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- YDKNBNOOCSNPNS-UHFFFAOYSA-N methyl 1,3-benzoxazole-2-carboxylate Chemical compound C1=CC=C2OC(C(=O)OC)=NC2=C1 YDKNBNOOCSNPNS-UHFFFAOYSA-N 0.000 description 1
- YLHXLHGIAMFFBU-UHFFFAOYSA-N methyl phenylglyoxalate Chemical compound COC(=O)C(=O)C1=CC=CC=C1 YLHXLHGIAMFFBU-UHFFFAOYSA-N 0.000 description 1
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- MUTNCGKQJGXKEM-UHFFFAOYSA-N tamibarotene Chemical compound C=1C=C2C(C)(C)CCC(C)(C)C2=CC=1NC(=O)C1=CC=C(C(O)=O)C=C1 MUTNCGKQJGXKEM-UHFFFAOYSA-N 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
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- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
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- C08F283/14—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers obtained by ring-opening polymerisation of carbocyclic compounds having one or more carbon-to-carbon double bonds in the carbocyclic ring, i.e. polyalkeneamers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/101—Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/102—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/42—Block-or graft-polymers containing polysiloxane sequences
- C08G77/442—Block-or graft-polymers containing polysiloxane sequences containing vinyl polymer sequences
Definitions
- the present invention relates to an ultraviolet curable silicone composition that can be ejected by inkjet and a cured product thereof.
- Ultraviolet curable inkjet inks in the field of industrial inkjet printers are becoming mainstream because they have fast drying properties and low volatility, and can be printed on non-absorbing materials.
- a small amount of silicone is added as an antifoaming agent, a surfactant, or an abrasion resistance improving agent in this ultraviolet curable inkjet ink (Patent Documents 1, 2, and 3), but it is used as a main component.
- Patent Documents 1, 2, and 3 Patent Documents 1, 2, and 3
- the main reason is that the surface tension of silicone is very low, and if a large amount of silicone is added to the ink, ink jet discharge cannot be performed.
- silicone can be used as the main component, good rubber properties can be imparted and the weather resistance of the ink itself can be improved, so the industrial application of silicone can be expanded more than ever. It becomes.
- inkjet discharge type 3D printer materials has been actively carried out, but the material is generally very hard resin (Patent Document 4).
- Silicone materials for 3D printers have already been proposed (Patent Document 5), but there are no silicone materials that can be ejected by inkjet. Accordingly, there has been a strong demand for the development of a material that can be ejected by inkjet and exhibits good rubber properties after curing.
- an object of the present invention is to provide an ultraviolet curable silicone composition which can be ejected by inkjet and gives a cured product having good rubber properties.
- the present invention provides the following ultraviolet curable silicone composition.
- (A) Organopolysiloxane represented by the following general formula (1): 100 parts by mass,
- R 1 is a group independently selected from a monovalent aliphatic hydrocarbon group having 1 to 10 carbon atoms, an acryloyl group, a methacryloyl group, an alkyl acrylate group and an alkyl methacrylate group.
- R 2 is a group independently selected from a monovalent aliphatic hydrocarbon group having 1 to 10 carbon atoms, an acryloyl group, a methacryloyl group, an alkyl acrylate group, and an alkyl methacrylate group.
- m is a number satisfying 10 ⁇ m ⁇ 1,000.
- the ultraviolet curable silicone composition of the present invention has good viscosity, surface tension and curability, and can be ejected by inkjet.
- the cured product of the composition has good rubber properties (hardness, tensile strength, elongation at break). Therefore, the ultraviolet curable silicone composition of the present invention is useful as an inkjet ink material, particularly as a silicone material for a 3D printer using an inkjet method.
- FIG. 3 is a diagram showing a state of inkjet discharge of the composition of Example 1. It is a figure which shows the mode of the inkjet discharge of the composition of Example 4.
- FIG. 3 is a diagram showing a state of inkjet discharge of the composition of Example 1. It is a figure which shows the mode of the inkjet discharge of the composition of Example 4.
- FIG. 3 is a diagram showing a state of inkjet discharge of the composition of Example 1. It is a figure which shows the mode of the inkjet discharge of the composition of Example 4.
- the component (A) is an organopolysiloxane represented by the following general formula (1).
- R 1 in the above formula (1) is independently a group selected from a monovalent aliphatic hydrocarbon group having 1 to 10 carbon atoms, an acryloyl group, a methacryloyl group, an alkyl acrylate group and an alkyl methacrylate group.
- the monovalent aliphatic hydrocarbon group is preferably a monovalent aliphatic hydrocarbon group having 1 to 8 carbon atoms, such as a methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, octyl group.
- alkyl groups such as More preferably, it is a monovalent aliphatic hydrocarbon group having 1 to 6 carbon atoms, and among them, those in which 80% or more of the total number of R 1 are methyl groups are preferred from the viewpoint of ease of synthesis and cost.
- R 1 in the formula (1) are an acryloyl group, a methacryloyl group, an alkyl acrylate group, and an alkyl methacrylate group.
- the alkyl acrylate group include a butyl acrylate group and an acrylic group.
- examples thereof include an acid propyl group
- examples of the alkyl methacrylate group include a butyl methacrylate group and a propyl methacrylate group.
- the R 1 that is present at least two, propyl methacrylate groups or acrylic acid propyl groups are preferred, these may being the same or different.
- N in the formula (1) is a number satisfying 10 ⁇ n ⁇ 1,000, preferably 20 ⁇ n ⁇ 500, and more preferably 30 ⁇ n ⁇ 300.
- n is less than 10, volatilization tends to occur, and when n is greater than 1,000, the viscosity of the composition becomes high and ink jet discharge becomes difficult.
- the value of n can be calculated as an average value by, for example, 29 Si-NMR measurement.
- the organopolysiloxane represented by the above formula (1) is preferably one having one propyl methacrylate group or one propyl acrylate group at both ends of one molecule from the viewpoint of ease of synthesis and cost.
- organopolysiloxanes examples include the following compounds.
- R 1 is independently a monovalent aliphatic hydrocarbon group having 1 to 10 carbon atoms, specifically, R 1 in the above general formula (1) and Similar groups are mentioned.
- n is a number that satisfies 10 ⁇ n ⁇ 1,000
- k is a number that satisfies 0 ⁇ k ⁇ 4.
- the content of the component (A) in the organopolysiloxane composition is preferably 10 to 95% by mass, and more preferably 15 to 80% by mass.
- the component (B) is a monofunctional (meth) acrylate compound not containing a siloxane structure.
- the monofunctional (meth) acrylate compound not containing the siloxane structure include isoamyl acrylate, lauryl acrylate, stearyl acrylate, ethoxy-diethylene glycol acrylate, methoxy-triethylene glycol acrylate, 2-ethylhexyl-diglycol acrylate, phenoxyethyl acrylate, Examples include phenoxydiethylene glycol acrylate, tetrahydrofurfuryl acrylate, isobornyl acrylate, and mixtures thereof. Isobornyl acrylate is particularly preferable.
- the component (C) is a polyfunctional (meth) acrylate compound not containing a siloxane structure.
- the polyfunctional (meth) acrylate compound not containing the siloxane structure include triethylene glycol diacrylate, polytetramethylene glycol diacrylate, neopentyl glycol diacrylate, 1,6-hexanediol diacrylate, dimethylol-tricyclo Examples include decane diacrylate, trimethylolpropane triacrylate, pentaerythritol tetraacrylate, and mixtures thereof, and dimethylol-tricyclodecane diacrylate is particularly preferable.
- the total addition amount of either or both of the (B) component and the (meth) acrylate compound of the (C) component is 1 to 500 parts by weight, preferably 10 to 400 parts by mass.
- the curability of the composition is insufficient or the surface tension is low This makes it difficult to discharge the ink jet.
- the viscosity of the entire composition can be adjusted to a desired range suitable for inkjet ejection by increasing the total amount of the (B) component and / or the (C) component.
- the total addition amount exceeds 500 parts by mass with respect to 100 parts by mass of the component (A)
- the hardness of the cured product becomes higher than necessary, and desired rubber physical properties cannot be obtained.
- Photoinitiator A component is a photoinitiator.
- the photopolymerization initiator include 2,2-diethoxyacetophenone, 2,2-dimethoxy-1,2-diphenylethane-1-one (Irgacure 651 manufactured by BASF), 1-hydroxy-cyclohexyl-phenyl-ketone (BASF).
- Irgacure 184 2-hydroxy-2-methyl-1-phenyl-propan-1-one (Irgacure 1173 from BASF), 2-hydroxy-1- ⁇ 4- [4- (2-hydroxy-2-methyl- Propionyl) -benzyl] -phenyl ⁇ -2-methyl-propan-1-one (Irgacure 127 from BASF), phenylglyoxylic acid methyl ester (Irgacure MBF from BASF), 2-methyl-1- [4- (methylthio ) Phenyl] -2-morpholinopropane 1-one (Irgacure 907 manufactured by BASF), 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -1-butanone (Irgacure 369 manufactured by BASF), bis (2,4,6-trimethylbenzoyl) -Phenylphosphine oxide (Irgacure 819 manufactured by BASF), 2,4,6-trimethylbenzoy
- 2,2-diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenyl-propan-1-one is preferable from the viewpoint of compatibility with the component (A).
- Irgacure 1173 bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide (Irgacure 819 made by BASF), 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide (Irgacure TPO made by BASF) .
- the addition amount of the photopolymerization initiator is blended in the range of 0.1 to 20 parts by mass with respect to 100 parts by mass of the component (A).
- the addition amount is less than 0.1 parts by mass with respect to 100 parts by mass of component (A)
- the curability of the composition is insufficient, and when it exceeds 20 parts by mass with respect to 100 parts by mass of component (A), The deep curability of the composition is deteriorated.
- the ultraviolet curable silicone composition of the present invention may further contain an organopolysiloxane represented by the following general formula (2) as a component (E) as necessary, in addition to the above essential components.
- R 2 in the above formula (2) is independently a group selected from a monovalent aliphatic hydrocarbon group having 1 to 10 carbon atoms, an acryloyl group, a methacryloyl group, an alkyl acrylate group and an alkyl methacrylate group.
- the monovalent aliphatic hydrocarbon group is preferably a monovalent aliphatic hydrocarbon group having 1 to 8 carbon atoms, such as a methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, octyl group.
- alkyl groups such as More preferably, it is a monovalent aliphatic hydrocarbon group having 1 to 6 carbon atoms, and among them, those in which 80% or more of the total number of R 2 are methyl groups are preferable from the viewpoint of ease of synthesis and cost.
- R 2 in the above formula (2) is an acryloyl group, a methacryloyl group, an alkyl acrylate group, or an alkyl methacrylate group.
- the alkyl acrylate group include a butyl acrylate group and an acrylic acid group.
- the alkyl methacrylate group include a butyl methacrylate group and a propyl methacrylate group.
- one R 2 is preferably a propyl methacrylate group or a propyl acrylate group from the viewpoint of ease of synthesis.
- M in the formula (2) is a number satisfying 10 ⁇ m ⁇ 1,000, preferably 20 ⁇ m ⁇ 500, more preferably 30 ⁇ m ⁇ 300.
- m is smaller than 10
- the composition is easily volatilized, and when m is larger than 1,000, the viscosity of the composition becomes high and ink jet discharge becomes difficult.
- the value of m can be calculated as an average value by, for example, 29 Si-NMR measurement.
- organopolysiloxane represented by the above formula (2) those having one propyl methacrylate group or one propyl acrylate group at one end of one molecule are preferable from the viewpoint of ease of synthesis and cost.
- organopolysiloxanes include the following compounds.
- R 2 is each independently a monovalent aliphatic hydrocarbon group having 1 to 10 carbon atoms, specifically, R 2 in the above general formula (2) and Similar groups are mentioned.
- m is a number that satisfies 10 ⁇ m ⁇ 1,000
- k is a number that satisfies 0 ⁇ k ⁇ 4.
- the blending amount is preferably 0.1 to 1,000 parts by weight and more preferably 1 to 100 parts by weight with respect to 100 parts by weight of the component (A). .
- the blending amount is 0.1 to 1,000 parts by mass with respect to 100 parts by mass of the component (A)
- improvement in elongation at break in a cured product of the composition can be expected.
- composition of the present invention a color material (pigment or dye), a silane coupling agent, an adhesion assistant, a polymerization inhibitor, an antioxidant, an ultraviolet absorber, Additives such as light stabilizers can be blended.
- a color material pigment or dye
- silane coupling agent silane coupling agent
- an adhesion assistant e.g., a silane coupling agent
- a polymerization inhibitor e.g., ethylene glycol dimethacrylate
- antioxidant e.g., ethylene glycol dimethoxysulfate, ethylene glycol dimethacrylate, ethylene glycol dimethacrylate, ethylene glycol dimethacrylate, ethylene glycol dimethacrylate, ethylene glycol dimethacrylate, ethylene glycol dimethacrylate, ethylene glycol dimethacrylate, ethylene glycol dimethacrylate, ethylene glycol dimethacrylate, ethylene glycol dimethacrylate, ethylene glycol dimethacrylate,
- the ultraviolet curable silicone composition of the present invention comprises the above component (A), component (B), component (C), component (D), and component (E) as necessary. It can be produced by stirring and mixing other components.
- the apparatus used for operations, such as stirring is not specifically limited, A crusher, 3 rolls, a ball mill, a planetary mixer, etc. can be used. Moreover, you may combine these apparatuses suitably.
- the viscosity at 23 ° C. of the composition is preferably 2,000 mPa ⁇ s or less, more preferably 1,000 mPa ⁇ s or less.
- the surface tension of the composition is preferably 21 mN / m or more and 36 mN / m or less. Within these ranges, stable ink jet ejection can be performed.
- the ultraviolet curable silicone composition of the present invention is rapidly cured by irradiation with ultraviolet rays.
- the ultraviolet light source for irradiating the ultraviolet curable silicone composition of the present invention include a UV LED lamp, a high pressure mercury lamp, an ultrahigh pressure mercury lamp, a metal halide lamp, a carbon arc lamp, and a xenon lamp.
- the amount of UV irradiation is preferably 1 to 5,000 mJ / cm 2 and more preferably 10 to 5,000 mJ for a sheet formed with the composition of the present invention having a thickness of about 2.0 mm, for example. 4,000 mJ / cm 2 . That is, when ultraviolet rays having an illuminance of 100 mW / cm 2 are used, the ultraviolet rays may be irradiated for about 0.01 to 50 seconds.
- the hardness after hardening is 10 or more (TypeA), and it is more preferable that it is 20 or more (TypeA).
- the tensile strength is preferably 0.5 MPa or more, and more preferably 0.8 MPa or more.
- the elongation at break is preferably 10% or more, and more preferably 20% or more. These values are values measured according to JIS-K6249.
- the hardness after curing can be adjusted by increasing or decreasing the addition amount of either one or both of the component (B) and the component (C), and the tensile strength and elongation at break after curing can be adjusted in the same manner.
- compositions of Examples 1 to 6 and Comparative Examples 1 and 2 having the compositions shown in Table 1 were prepared and evaluated by the following methods.
- the viscosity of the composition is a value measured at 23 ° C. using a rotational viscometer.
- the surface tension is a value measured using an automatic surface tension meter CBVP-Z manufactured by Kyowa Interface Science Co., Ltd.
- the inkjet discharge performance was measured under a discharge condition of a driving voltage of 80 V, a head temperature of 80 ° C., and a nozzle diameter of 80 ⁇ m using a liquid jet observation device IJK-200S (glass 1 nozzle inkjet head IJHE-1000).
- the ejection state was evaluated by photographing with a camera. When a droplet of 100 pl / droplet or more was ejected, the evaluation was ⁇ , and when the state did not correspond, the evaluation was ⁇ . 1 and 2 show the state of inkjet discharge of the compositions of Examples 1 and 4, respectively.
- the hardness, elongation at break, and tensile strength of the cured product were measured according to JIS-K6249. At that time, the cured product was obtained by irradiating ultraviolet rays at 4,000 mJ / cm 2 in a nitrogen atmosphere using a lamp H (M) 06-L-61 manufactured by IGraphics Co., Ltd. The thickness of the sheet was 2.0 mm.
- Component (C) Dimethylol-tricyclodecane diacrylate (Light acrylate DCP-A manufactured by Kyoeisha Chemical)
- D-1 2-hydroxy-2-methyl-1-phenyl-propan-1-one (Irgacure 1173 manufactured by BASF)
- D-2 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide (Irgacure TPO manufactured by BASF)
- Organopolysiloxane A-5 was obtained in the same manner as in Synthesis Example 4 except that the amount of octamethylcyclotetrasiloxane charged was 8,300 g.
- the structure of A-5 (the number of repeating units of the dimethylsiloxy group) was calculated from 29 Si-NMR.
- the ultraviolet curable silicone composition of the present invention has good ink jet ejection properties and curability, and exhibits excellent rubber properties after curing. Silicone for ink jet ink materials, particularly 3D printers using an ink jet system. Useful as a material.
- Comparative Example 1 using an organopolysiloxane component that does not satisfy the range represented by Formula (1) inkjet discharge is impossible due to an increase in viscosity, and Comparative Example 2 does not include (B) component. Then, due to insufficient surface tension, the ink jet property was lowered and the curability was insufficient.
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Abstract
Description
例えば、近年インクジェット吐出方式の3Dプリンター材料の開発が活発に行われているが、その材料は非常に硬い樹脂が一般的である(特許文献4)。既に3Dプリンター用のシリコーン材料も提案されているが(特許文献5)、インクジェット吐出出来るシリコーン材料は未だ存在していない。そこで、インクジェット吐出出来るうえに硬化後に、良好なゴム物性を示す材料の開発が強く望まれていた。
[1]
(A)下記一般式(1)で示されるオルガノポリシロキサン:100質量部、
(B)シロキサン構造を含まない単官能(メタ)アクリレート化合物及び(C)シロキサン構造を含まない多官能(メタ)アクリレート化合物の何れか一方又は両方:(A)成分100質量部に対して1~500質量部、及び
(D)光重合開始剤:(A)成分100質量部に対して0.1~20質量部
を含有する紫外線硬化性シリコーン組成物。
更に、(E)下記一般式(2)で示されるオルガノポリシロキサンを(A)成分100質量部に対して0.1~1,000質量部含む[1]に記載の紫外線硬化性シリコーン組成物。
23℃での粘度が2,000mPa・s以下であり、表面張力が21mN/m以上である[1]または[2]に記載の紫外線硬化性シリコーン組成物。
[1]~[3]のいずれか1項に記載の紫外線硬化性シリコーン組成物の硬化物。
[1]~[3]のいずれか1項に記載の紫外線硬化性シリコーン組成物を含むインクジェット用インク組成物。
[1]~[3]のいずれか1項に記載の紫外線硬化性シリコーン組成物を含む3Dプリンター用インク組成物。
(B)成分は、シロキサン構造を含まない単官能(メタ)アクリレート化合物である。該シロキサン構造を含まない単官能(メタ)アクリレート化合物としては、イソアミルアクリレート、ラウリルアクリレート、ステアリルアクリレート、エトキシ-ジエチレングリコールアクリレート、メトキシ-トリエチレングルコールアクリレート、2-エチルヘキシル-ジグルコールアクリレート、フェノキシエチルアクリレート、フェノキシジエチレングリコールアクリレート、テトラヒドロフルフリルアクリレート、イソボルニルアクリレート及びこれらの混合物等が挙げられ、特にイソボルニルアクリレートが好ましい。
(C)成分は、シロキサン構造を含まない多官能(メタ)アクリレート化合物である。該シロキサン構造を含まない多官能(メタ)アクリレート化合物としては、トリエチレングルコールジアクリレート、ポリテトラメチレングルコールジアクリレート、ネオペンチルグリコールジアクリレート、1,6-ヘキサンジオールジアクリレート、ジメチロール-トリシクロデカンジアクリレート、トリメチロルプロパントリアクリレート、ペンタエリスリトールテトラアクリレート及びこれらの混合物等が挙げられ、特にジメチロール-トリシクロデカンジアクリレートが好ましい。
(D)成分は光重合開始剤である。該光重合開始剤としては、2,2-ジエトキシアセトフェノン、2,2-ジメトキシ-1,2-ジフェニルエタン-1-オン(BASF製Irgacure 651)、1-ヒドロキシ-シクロヘキシル-フェニル-ケトン(BASF製Irgacure 184)、2-ヒドロキシ-2-メチル-1-フェニル-プロパン-1-オン(BASF製Irgacure 1173)、2-ヒドロキシ-1-{4-[4-(2-ヒドロキシ-2-メチループロピオニル)-ベンジル]-フェニル}-2-メチループロパン-1-オン(BASF製Irgacure 127)、フェニルグリオキシリックアシッドメチルエステル(BASF製Irgacure MBF)、2-メチル-1-[4-(メチルチオ)フェニル]-2-モルフォリノプロパン-1-オン(BASF製Irgacure 907)、2-ベンジル-2-ジメチルアミノ-1-(4-モルフォリノフェニル)-1-ブタノン(BASF製Irgacure 369)、ビス(2,4,6-トリメチルベンゾイル)-フェニルフォスフィンオキサイド(BASF製Irgacure 819)、2,4,6-トリメチルベンゾイル-ジフェニル-フォスフィンオキサイド(BASF製Irgacure TPO)及びこれらの混合物等が挙げられる。
本発明の組成物には、本発明の効果を損なわない範囲で、色材(顔料或いは染料)、シランカップリング剤、接着助剤、重合禁止剤、酸化防止剤、紫外線吸収剤、光安定化剤等の添加剤を配合することができる。また、本発明の組成物は他の樹脂組成物と適宜混合して使用することもできる。
本発明の紫外線硬化性シリコーン組成物は、上記(A)成分、(B)成分、(C)成分、(D)成分、及び必要に応じて(E)成分、その他の成分を攪拌及び混合等することにより製造することができる。攪拌等の操作に用いる装置は特に限定されないが、擂潰機、3本ロール、ボールミル、プラネタリーミキサー等を用いることができる。また、これら装置を適宜組み合わせてもよい。
硬化後の硬度は、(B)成分及び(C)成分の何れか一方又は両方の添加量を増減することによって調整でき、硬化後の引張強さ及び切断時伸びも同様な手法で調整できる。
尚、下記の例で、組成物の粘度は回転粘度計を用いて23℃で測定した値である。表面張力は協和界面科学株式会社製自動表面張力計CBVP-Z型を用いて測定した値である。また、インクジェット吐出性は、株式会社マイクロジェットの液滴観察装置IJK-200S(硝子製1ノズルインクジェットヘッドIJHE-1000)を用いて、駆動電圧80V、ヘッド温度80℃、ノズル径80μmの吐出条件で吐出状態をカメラで撮影することにより評価し、100pl/滴以上の液滴が吐出された場合は○とし、該状態に該当しなかった場合は×として評価を行った。
図1及び図2はそれぞれ実施例1及び4の組成物のインクジェット吐出の様子を示す。
[合成例1]
温度計、攪拌機を取り付けた硝子製反応器中に1,3-ビス(メタクリロキシプロピル)テトラメチルジシロキサン42g、オクタメチルシクロテトラシロキサン806g、トリフルオロメタンスルホン酸1.3gを仕込み、60℃で5時間反応させた。その後、25℃に戻し、ハイドロタルサイト(キョーワード500、協和化学工業製)を4g添加し中和した。ろ過後、120℃で減圧濃縮を行い、オルガノポリシロキサンA-1を700g得た。A-1の構造(ジメチルシロキシ基の繰り返し単位数)は、29Si-NMRより算出した。
温度計、攪拌機を取り付けた硝子製反応器中に1,3-ビス(メタクリロキシプロピル)テトラメチルジシロキサン22g、オクタメチルシクロテトラシロキサン248g、トリフルオロメタンスルホン酸0.2gを仕込み、60℃で5時間反応させた。その後、25℃に戻し、ハイドロタルサイト(キョーワード500、協和化学工業製)を4g添加し中和した。ろ過後、120℃で減圧濃縮を行い、オルガノポリシロキサンA-2を200g得た。A-2の構造(ジメチルシロキシ基の繰り返し単位数)は、29Si-NMRより算出した。
温度計、攪拌機を取り付けた硝子製反応器中に1,3-ビス(メタクリロキシプロピル)テトラメチルジシロキサン77g、テトラメチルシクロテトラシロキサン366g、オクタメチルシクロテトラシロキサン1,050g、トリフルオロメタンスルホン酸3.2gを仕込み、25℃で15時間反応させた。その後、ハイドロタルサイト(キョーワード500、協和化学工業製)を19g添加し中和した。ろ過後、120℃で減圧濃縮を行って得られたオルガノハイドロジェンポリシロキサンにヘキセン836gとカルステッド触媒0.2gを加え、120℃で4時間反応を行った後、120℃で減圧濃縮してオルガノポリシロキサンA-3を1,627g得た。A-3の構造(ジメチルシロキシ基の繰り返し単位数)は、29Si-NMRより算出した。
温度計、攪拌機を取り付けた硝子製反応器中に1,3-ビス(メタクリロキシプロピル)テトラメチルジシロキサン22g、オクタメチルシクロテトラシロキサン4,150g、トリフルオロメタンスルホン酸0.2gを仕込み、60℃で5時間反応させた。その後、25℃に戻し、ハイドロタルサイト(キョーワード500、協和化学工業製)を4g添加し中和した。ろ過後、120℃で減圧濃縮を行い、オルガノポリシロキサンA-4を3,200g得た。A-4の構造(ジメチルシロキシ基の繰り返し単位数)は、29Si-NMRより算出した。
イソボルニルアクリレート(共栄社化学製ライトアクリレートIB-XA)
ジメチロール-トリシクロデカンジアクリレート(共栄社化学製ライトアクリレートDCP-A)
D-1:2-ヒドロキシ-2-メチル-1-フェニル-プロパン-1-オン(BASF製Irgacure 1173)
D-2:2,4,6-トリメチルベンゾイル-ジフェニル-フォスフィンオキサイド(BASF製Irgacure TPO)
[合成例5]
冷却管、温度計、滴下ロート、攪拌機を取り付けた硝子製反応器中にヘキサメチルシクロトリシロキサン100gとトルエン100gを混合し、1時間共沸脱水を行った。その後、反応液を10℃まで冷却し、n-ブチルリチウム(15質量%ヘキサン溶液)8.2gを滴下し温度を25℃まで上げ1時間撹拌した。ついでジメチルホルムアミド2gを添加し、重合反応を25℃で20時間行い、トリエチルアミン0.2gを添加し、更に3-メタクリロキシプロピルジメチルクロロシラン4.6gを添加し、1時間反応させた。メタノール100gを添加し、1時間撹拌後に静置し、シロキサン層を得た。その後100℃で減圧濃縮を行い、下記(E)成分70gを得た。下記(E)成分の構造(ジメチルシロキシ基の繰り返し単位数)は、29Si-NMRより算出した。
[比較合成例1]
オクタメチルシクロテトラシロキサンの仕込量を8,300gとした以外は、合成例4と同様の方法で下記オルガノポリシロキサンA-5を得た。A-5の構造(ジメチルシロキシ基の繰り返し単位数)は、29Si-NMRより算出した。
Claims (6)
- (A)下記一般式(1)で示されるオルガノポリシロキサン:100質量部、
(B)シロキサン構造を含まない単官能(メタ)アクリレート化合物及び(C)シロキサン構造を含まない多官能(メタ)アクリレート化合物の何れか一方又は両方:(A)成分100質量部に対して1~500質量部、及び
(D)光重合開始剤:(A)成分100質量部に対して0.1~20質量部
を含有する紫外線硬化性シリコーン組成物。 - 23℃での粘度が2,000mPa・s以下であり、表面張力が21mN/m以上である請求項1または2に記載の紫外線硬化性シリコーン組成物。
- 請求項1~3のいずれか1項に記載の紫外線硬化性シリコーン組成物の硬化物。
- 請求項1~3のいずれか1項に記載の紫外線硬化性シリコーン組成物を含むインクジェット用インク組成物。
- 請求項1~3のいずれか1項に記載の紫外線硬化性シリコーン組成物を含む3Dプリンター用インク組成物。
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JPWO2018003381A1 (ja) | 2019-05-16 |
CN109415472A (zh) | 2019-03-01 |
TW201819440A (zh) | 2018-06-01 |
KR102261399B1 (ko) | 2021-06-07 |
TWI731985B (zh) | 2021-07-01 |
CN109415472B (zh) | 2021-03-12 |
US20220119663A1 (en) | 2022-04-21 |
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