WO2020075655A1 - ブロック共重合体を含むペレット及び該ペレットから得られる成形体 - Google Patents
ブロック共重合体を含むペレット及び該ペレットから得られる成形体 Download PDFInfo
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- WO2020075655A1 WO2020075655A1 PCT/JP2019/039382 JP2019039382W WO2020075655A1 WO 2020075655 A1 WO2020075655 A1 WO 2020075655A1 JP 2019039382 W JP2019039382 W JP 2019039382W WO 2020075655 A1 WO2020075655 A1 WO 2020075655A1
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- Prior art keywords
- acrylic
- polymer
- block copolymer
- pellets
- copolymer
- Prior art date
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- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 2
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Definitions
- the present invention relates to a pellet containing an acrylic block copolymer having a polymer block containing a methyl acrylate unit, and a molded body obtained by molding the pellet.
- Acrylic block copolymers having a polymer block containing an acrylic acid ester unit and a polymer block containing a methacrylic acid ester unit have various properties such as adhesives, soft materials, resin modifiers, etc. Is being considered for use.
- an acrylic block copolymer containing a methyl acrylate unit in a polymer block containing an acrylate ester unit is excellent in durability against a plasticizer and has excellent adhesiveness.
- a laminate with a vinyl chloride resin or the like is under study (for example, Patent Document 1).
- the acrylic block copolymer as a raw material is usually manufactured as granular pellets.
- the acrylic block copolymer containing a methyl acrylate unit in the polymer block containing an acrylate unit has significant sticking, and even if pellets are prepared from this acrylic block copolymer, if it is left as it is for a while, Due to its own weight, it becomes a block-like large lump that is an aggregate of pellets, and it may be difficult to restore the pellet state even if external force is simply applied to this lump.
- An object of the present invention is to provide a pellet containing an acrylic block copolymer having a polymer block containing a methyl acrylate unit, which is sufficiently prevented from sticking.
- the object is to provide a molded product that does not impair the excellent properties of the copolymer.
- the present inventors have found that a specific acrylic block copolymer having a polymer block containing a methyl acrylate unit and a specific acrylic block copolymer different from this. It has been found that by blending with an acrylic polymer in a specific mass ratio, when it is manufactured as pellets, sufficient sticking can be prevented. Furthermore, they have found that a molded product can be produced from the pellets without impairing the excellent properties of the acrylic block copolymer.
- an acrylic block copolymer (I) having at least one polymer block (A1) containing a methacrylic acid ester unit and at least one polymer block (B1) containing an acrylic acid ester unit, And a pellet containing an acrylic polymer (II) containing 35% by mass or more of methyl methacrylate unit and having a melt flow rate (MFR) of 10 g / 10 minutes or more under conditions of 230 ° C. and a load of 3.8 kg.
- MFR melt flow rate
- the acrylic ester unit contained in the polymer block (B1) of the acrylic block copolymer (I) includes a methyl acrylate unit and a general formula CH 2 ⁇ CH—COOR 1 (1) (wherein R 1 is a carbon atom). (Representing an organic group of the formula 4 to 12) consisting only of an acrylic ester (1) unit, Pellets having a mass ratio (I) / (II) of the acrylic block copolymer (I) and the acrylic polymer (II) of 90/10 to 40/60; [2] The pellet according to [1], which contains 200 to 2000 ppm of an anti-sticking agent. [3] A molded product obtained by molding the pellet according to [1] or [2]; Is achieved by providing.
- pellets containing an acrylic block copolymer having a polymer block containing a methyl acrylate unit, which is sufficiently prevented from sticking can be obtained. It is possible to obtain a molded product that does not impair the excellent properties of the block copolymer.
- (meth) acrylic acid ester is a general term for "methacrylic acid ester” and “acrylic acid ester”
- (meth) acrylic means “methacrylic” and "acrylic”. It is a generic term.
- the acrylic block copolymer (I) contained in the pellet of the present invention comprises at least one polymer block (A1) containing a methacrylic acid ester unit and at least one polymer block (A1) containing an acrylic acid ester unit.
- B1) and the acrylate unit contained in the polymer block (B1) is a methyl acrylate unit and a general formula CH 2 ⁇ CH—COOR 1 (1) (wherein R 1 has 4 to 4 carbon atoms). 12 represents an organic group) and is composed of only an acrylic ester (1) unit.
- Examples of the methacrylic acid ester serving as the constitutional unit of the polymer block (A1) include, for example, methyl methacrylate, ethyl methacrylate, propyl methacrylate, n-butyl methacrylate, t-butyl methacrylate, n-hexyl methacrylate, Alkyl methacrylates such as cyclohexyl methacrylate, 2-ethylhexyl methacrylate, n-octyl methacrylate, lauryl methacrylate, tridecyl methacrylate, stearyl methacrylate and isobornyl methacrylate; Methacrylic acid ester having no functional group other than alkyl methacrylate such as phenyl methacrylate and benzyl methacrylate; Functional groups such as methoxyethyl methacrylate, ethoxyethyl methacrylate, and other alkoxyalkyl methacrylates,
- alkyl methacrylate is preferable, methyl methacrylate, ethyl methacrylate, and propyl methacrylate are more preferable, economically easily available, and the obtained polymer block (A1) has excellent durability and weather resistance. Therefore, methyl methacrylate is more preferable.
- the methacrylic acid ester unit of the polymer block (A1) may be obtained from only one methacrylic acid ester or may be obtained from two or more methacrylic acid esters.
- the proportion of methacrylic acid ester units contained in the polymer block (A1) is preferably 60% by mass or more, more preferably 80% by mass or more, and further preferably 90% by mass or more, in the polymer block (A1).
- the polymer block (A1) may be composed of 100% by mass of methacrylic acid ester units, that is, composed of only methacrylic acid ester units.
- the polymer block (A1) may contain other monomer units as long as the effects of the present invention are not impaired.
- examples of such other monomers include acrylic acid esters; vinyl-based monomers having a carboxyl group such as (meth) acrylic acid, crotonic acid, maleic acid, maleic anhydride, fumaric acid; (meth) acrylamide, Vinyl-based monomers having a functional group such as (meth) acrylonitrile, vinyl acetate, vinyl chloride, and vinylidene chloride; aromatic vinyl-based monomers such as styrene, ⁇ -methylstyrene, p-methylstyrene, and m-methylstyrene Examples thereof include conjugated diene-based monomers such as butadiene and isoprene; olefin-based monomers such as ethylene, propylene, isobutene and octene; lactone-based monomers such as ⁇ -caprolactone and valerolactone.
- the amount of the monomer unit composed of these other monomers is usually a small amount, based on the total amount of the monomer units of the polymer block (A1), and the other unit amount contained in the polymer block (A1).
- the proportion of body units is preferably 40% by mass or less, more preferably 20% by mass or less, and further preferably 10% by mass or less.
- the glass transition temperature (Tg) of the polymer block (A1) is preferably 50 to 150 ° C, more preferably 60 to 140 ° C, and even more preferably 70 to 130 ° C.
- Tg glass transition temperature
- the stickiness at a high temperature for example, 50 ° C.
- the stickiness resistance is improved
- the acrylic block copolymer (I) may include two or more polymer blocks (A1). In that case, the methacrylic acid ester units and other units constituting the polymer blocks (A1) may be included.
- the monomers may be the same or different.
- the weight average molecular weight of the polymer block (A1) is not particularly limited, but is preferably in the range of 1,000 to 50,000, more preferably in the range of 4,000 to 20,000. When the weight average molecular weight of the polymer block (A1) is less than 1,000, the resulting acrylic block copolymer (I) may have insufficient cohesive force. Further, when the weight average molecular weight of the polymer block (A1) is larger than 50,000, the obtained acrylic block copolymer (I) has a high melt viscosity, and the acrylic block copolymer (I) has a high melt viscosity. The productivity and the moldability of the resulting pellets containing the acrylic block copolymer (I) may be poor.
- a weight average molecular weight (Mw) means the standard polystyrene conversion weight average molecular weight measured by the gel permeation chromatography (GPC) method.
- the polymer block (B1) contains an acrylic acid ester unit, and the acrylic acid ester unit contained in the polymer block (B1) includes a methyl acrylate unit and a general formula CH 2 ⁇ CH—COOR 1 (1) ( In the formula, R 1 represents an organic group having 4 to 12 carbon atoms).
- acrylate ester (1) examples include n-butyl acrylate, isobutyl acrylate, sec-butyl acrylate, tert-butyl acrylate, amyl acrylate, isoamyl acrylate, n-hexyl acrylate, and acrylic acid 2 -Acrylic acid having an alkyl group having 4 to 12 carbon atoms such as ethylhexyl, n-octyl acrylate, isooctyl acrylate, decyl acrylate, isobornyl acrylate, lauryl acrylate, cyclohexyl acrylate, phenyl acrylate and benzyl acrylate Acrylic ester having no functional group such as alkyl; 2-ethoxyethyl acrylate, 2- (diethylamino) ethyl acrylate, tetrahydrofurfuryl acrylate, 2-phenoxyethyl acrylate, etc
- acrylic acid esters (1) acrylic acid esters having no functional group are preferable, because the phase separation between the polymer block (A1) and the polymer block (B1) becomes clearer, and the number of carbon atoms is 4 Alkyl acrylates having 1 to 12 alkyl groups are more preferable, and n-butyl acrylate and 2-ethylhexyl acrylate are even more preferable. In addition, n-butyl acrylate is more preferable because a molded product having flexibility, high adhesion, and excellent durability tends to be easily obtained from the pellets.
- the acrylic acid ester (1) unit contained in the polymer block (B1) may be obtained from only one kind of acrylic acid ester (1), or from two or more kinds of acrylic acid ester (1). It may be obtained.
- the mass ratio of the methyl acrylate unit to the acrylic acid ester (1) unit in the polymer block (B1), methyl acrylate / acrylic acid ester (1), is preferably 90/10 to 10/90.
- the acrylic block copolymer (I) is excellent in the balance between the resistance to the plasticizer due to the methyl acrylate unit and the flexibility due to the acrylate ester (1) unit.
- the above mass ratio, methyl acrylate / acrylic acid ester (1) is preferably 90/10 to 25/75, and 85/15 to 37/63. Is more preferable, and 80/20 to 42/58 is further preferable.
- the mass ratio of the methyl acrylate unit and the acrylate ester (1) unit can be determined by 1 H-NMR measurement.
- the upper limit of the proportion of the methyl acrylate units in the acrylic acid ester units of the polymer block (B1) is preferably 90%, more preferably 85%, and further preferably 80%. preferable. Further, the lower limit of the proportion of the methyl acrylate unit in the polymer block (B1) is preferably 25%, more preferably 37%, and further preferably 42%.
- the proportion of acrylic acid ester units consisting only of methyl acrylate units and acrylic acid ester (1) units contained in the polymer block (B1) is preferably 60% by mass or more in the polymer block (B1), and 80% by mass. % Or more is more preferable, and 90% by mass or more is further preferable.
- the polymer block (B1) may be composed of 100% by mass of acrylic acid ester units, that is, composed of only acrylic acid ester units.
- the above polymer block (B1) may contain a monomer unit other than the acrylic acid ester unit as long as the effect of the present invention is not impaired.
- monomers constituting such units include methacrylic acid esters; vinyl-based monomers having a carboxyl group such as (meth) acrylic acid, crotonic acid, maleic acid, maleic anhydride, and fumaric acid; ) Vinyl monomers having a functional group such as acrylamide, (meth) acrylonitrile, vinyl acetate, vinyl chloride, vinylidene chloride; aromatic vinyl such as styrene, ⁇ -methylstyrene, p-methylstyrene, m-methylstyrene Examples thereof include conjugated monomers such as butadiene and isoprene; olefinic monomers such as ethylene, propylene, isobutene and octene; lactone monomers such as ⁇ -caprolactone and valerolactone.
- the amount of the monomer unit composed of these other monomers is usually a small amount relative to all the monomer units of the polymer block (B1), and the other unit amount contained in the polymer block (B1) is small.
- the proportion of body units is preferably 40% by mass or less, more preferably 20% by mass or less, and further preferably 10% by mass or less.
- the acrylic block copolymer (I) may include two or more polymer blocks (B1).
- the acrylic ester units constituting the polymer blocks (B1) The combination may be the same or different.
- the polymer block (B1) may be composed of a random copolymer of methyl acrylate and acrylate ester (1) constituting the polymer block (B1), or may be a block copolymer or a graft copolymer. Or a tapered block copolymer (gradient copolymer).
- the acrylic block copolymer (I) contains two or more polymer blocks (B1), the structures of the polymer blocks (B1) may be the same or different.
- the glass transition temperature (Tg) of the polymer block (B1) is more preferably ⁇ 45 to 55 ° C., more preferably ⁇ 35 to 50 ° C., and further preferably ⁇ 30 to 45 ° C. It is more preferably -30 to 25 ° C. When the glass transition temperature is within this range, the molded product obtained from the pellets tends to be flexible, have high adhesiveness, and have excellent durability.
- the difference in glass transition temperature between the polymer block (A1) and the polymer block (B1) in the acrylic block copolymer (I) is preferably 50 ° C or higher, more preferably 70 ° C or higher.
- the acrylic block copolymer (I) has the general formula: when the polymer block (A1) is “A1” and the polymer block (B1) is “B1”; (A1-B1) n (A1-B1) n -A1 A1- (A1-B1) n (A1-B1) n -Z (B1-A1) n -Z (In the formula, n represents an integer of 1 to 30, Z represents a coupling site (the coupling site after the coupling agent reacts with the polymer terminal to form a chemical bond)). Is preferred. The value of n is preferably 1 to 15, more preferably 1 to 8, and even more preferably 1 to 4. )
- n represents an integer of 1 to 30
- m represents an integer of 2 to 30
- Z represents a coupling site (a coupling site after the coupling agent reacts with the polymer terminal to form a chemical bond)
- m is preferably 2 to 15, more preferably 2 to 8, and even more preferably 2 to 4.
- n is preferably 1 to 15, more preferably 1 to 8, and even more preferably 1 to 4.
- a linear block copolymer represented by (A1-B1) n , (A1-B1) n -A1, and A1- (A1-B1) n is more preferable, and represented by A1-B1.
- the diblock copolymer and the triblock copolymer represented by A1-B1-A1 are more preferable, and the triblock copolymer represented by A1-B1-A1 are particularly preferable. These may be used alone or in combination of two or more.
- the content of the polymer block (A1) in the acrylic block copolymer (I) is preferably 5 to 40% by mass.
- the acrylic block copolymer (I) tends to have high fluidity and tends to be in a liquid state, and the acrylic block copolymer (I) and the later-described When producing pellets from the acrylic polymer (II), there is a tendency that the pellet shape cannot be maintained even if the pellets are cut with, for example, an underwater cutter.
- the content of the polymer block (A1) exceeds 40% by mass, flexibility tends to be impaired.
- the content of the polymer block (A1) in the acrylic block copolymer (I) is preferably 8 to 35% by mass, and is 14 to 31% by mass from the viewpoint of obtaining pellets having excellent flexibility. Is more preferable.
- the acrylic block copolymer (I) has a weight average molecular weight of 30,000 to 250,000. It is more preferably 40,000 to 200,000, still more preferably 50,000 to 180,000, still more preferably 60,000 to 160,000.
- the weight average molecular weight of the acrylic block copolymer (I) is less than 30,000, the cohesive force of the acrylic block copolymer (I) becomes insufficient, resulting in poor durability of the resulting molded article. There is. Further, problems such as occurrence of bleeding due to the acrylic block copolymer (I) may occur on the surface of the obtained molded product.
- the weight average molecular weight of the acrylic block copolymer (I) exceeds 250,000, the melt viscosity may become too high, resulting in poor productivity and processability. Further, the compatibility with the below-mentioned acrylic polymer (II) becomes low, and the transparency of the obtained pellets and molded articles obtained from the pellets is insufficient, or the obtained pellets and the pellets The physical properties of the obtained molded product may be uneven.
- the molecular weight distribution (Mw / Mn) of the acrylic block copolymer (I) is preferably 1.0 to 1.5.
- the molecular weight distribution of the acrylic block copolymer (I) is in the above range, the cohesive force of the acrylic block copolymer (I) is easily increased, and the contamination of the mold during molding of the resulting pellets is suppressed. It tends to be easy.
- the molecular weight distribution is more preferably 1.0 to 1.4, further preferably 1.0 to 1.3.
- a number average molecular weight (Mn) and a weight average molecular weight (Mw) mean the number average molecular weight and weight average molecular weight of standard polystyrene conversion measured by the gel permeation chromatography (GPC) method.
- the acrylic polymer (II) contained in the pellet of the present invention is a polymer different from the acrylic block copolymer (I), contains 35% by mass or more of methyl methacrylate unit, and is 230 ° C. and load 3 It is a polymer having a melt flow rate (MFR) of 10 g / 10 min or more under a condition of 0.8 kg.
- MFR melt flow rate
- the content of the methyl methacrylate unit contained in the acrylic polymer (II) is preferably 37% by mass or more.
- the MFR of the above acrylic polymer (II) under the conditions of a temperature of 230 ° C. and a load of 3.8 kg is: It is preferably 10 to 400 g / 10 minutes. If the MFR is less than 10 g / 10 minutes, the melt viscosity tends to be high, and the anti-sticking property tends to be difficult to be exhibited. When the MFR exceeds 400 g / 10 minutes, the kneadability during processing tends to be insufficient because the melt viscosity is low.
- the acrylic polymer (II) is an acrylic block copolymer (II-1) having a polymer block containing a methyl methacrylate unit, a random copolymer containing a methyl methacrylate unit or a methyl methacrylate homopolymer. Broadly divided into (II-2).
- the acrylic block copolymer (II-1) that can be contained in the pellet of the present invention has a polymer block containing a methyl methacrylate unit, and the content of the methyl methacrylate unit in the copolymer is 35% by mass.
- the above is the acrylic block copolymer.
- acrylic block copolymers (II-1) at least one polymer containing a methyl methacrylate unit, because it is excellent in compatibility with the acrylic block copolymer (I) and excellent in flexibility. It has a block (A2) and at least one polymer block (B2) containing an acrylic acid ester unit, and the acrylic acid ester unit contained in the polymer block (B2) has the general formula CH 2 ⁇ CH—COOR
- the proportion of methyl methacrylate units contained in the polymer block (A2) is preferably 60% by mass or more, more preferably 80% by mass or more, still more preferably 90% by mass or more, in the polymer block (A2).
- the polymer block (A2) may be composed of 100% by mass of methyl methacrylate unit, that is, composed of only methyl methacrylate unit.
- the above polymer block (A2) may contain a monomer unit other than methyl methacrylate as long as the effect of the present invention is not impaired.
- specific examples of such other monomers include methacrylic acid esters other than methyl methacrylate, acrylic acid esters; vinyl-based compounds having a carboxyl group such as (meth) acrylic acid, crotonic acid, maleic acid, maleic anhydride, and fumaric acid.
- Monomer vinyl-based monomer having a functional group such as (meth) acrylamide, (meth) acrylonitrile, vinyl acetate, vinyl chloride, vinylidene chloride; styrene, ⁇ -methylstyrene, p-methylstyrene, m-methyl Aromatic vinyl monomers such as styrene; Conjugated diene monomers such as butadiene and isoprene; Olefin monomers such as ethylene, propylene, isobutene and octene; Lactone monomers such as ⁇ -caprolactone and valerolactone The body etc. are mentioned.
- the amount of the monomer unit composed of these other monomers is usually a small amount relative to all the monomer units of the polymer block (A2), and the other unit amount contained in the polymer block (A2) is small.
- the proportion of body units is preferably 40% by mass or less, more preferably 20% by mass or less, and further preferably 10% by mass or less.
- the glass transition temperature (Tg) of the polymer block (A2) is preferably 50 to 150 ° C, more preferably 70 to 140 ° C, and further preferably 80 to 130 ° C.
- Tg glass transition temperature
- the stickiness at a high temperature for example, 50 ° C.
- the sticking resistance is improved
- the acrylic block copolymer (II-1A) may contain two or more polymer blocks (A2). In that case, a methyl methacrylate unit constituting the polymer blocks (A2) and The other monomers may be the same or different.
- the weight average molecular weight of the polymer block (A2) is not particularly limited, but is preferably in the range of 1,000 to 50,000, more preferably in the range of 4,000 to 20,000. When the weight average molecular weight of the polymer block (A2) is less than 1,000, the resulting acrylic block copolymer (II-1A) may have insufficient cohesive force. When the weight average molecular weight of the polymer block (A2) is larger than 50,000, the obtained acrylic block copolymer (II-1A) has a high melt viscosity, and the acrylic block copolymer (II -1A) and the resulting pellets containing the acrylic block copolymer (II-1A) may have poor moldability.
- the polymer block (B2) contains an acrylic acid ester unit, and the acrylic acid ester unit contained in the polymer block (B2) has a general formula CH 2 ⁇ CH—COOR 2 (2) (in the formula, R 2 Represents an organic group having 4 to 12 carbon atoms) and is composed only of an acrylic ester (2) unit.
- acrylic ester (2) is the same as the acrylic ester (1) which is one of the structural units of the polymer block (B1) of the acrylic block copolymer (I).
- acrylic acid esters (2) acrylic acid esters having no functional group are preferable, because the phase separation between the polymer block (A2) and the polymer block (B2) becomes clearer, and the acrylic acid ester has 4 carbon atoms.
- Alkyl acrylates having 1 to 12 alkyl groups are more preferable, and n-butyl acrylate and 2-ethylhexyl acrylate are even more preferable. From the pellets, n-butyl acrylate is even more preferable because it tends to give a molded product that is flexible, has high adhesion, and is excellent in durability.
- the acrylic acid ester (2) unit constituting the acrylic acid ester unit contained in the polymer block (B2) may be obtained from only one kind of the acrylic acid ester (2), or may be an acrylic acid ester. (2) It may be one obtained from two or more kinds.
- the proportion of acrylic acid ester units contained in the polymer block (B2) is preferably 60 mass% or more, more preferably 80 mass% or more, still more preferably 90 mass% or more, in the polymer block (B2).
- the polymer block (B2) may be composed of 100% by mass of acrylic acid ester unit, that is, composed of only acrylic acid ester unit.
- the polymer block (B2) may contain a monomer unit other than the acrylic acid ester unit as long as the effect of the present invention is not impaired.
- Specific examples of the other monomer are the same as those of the other monomer that can be a constituent unit of the polymer block (B1) of the acrylic block copolymer (I).
- the amount of the monomer unit composed of these other monomers is usually a small amount relative to all the monomer units of the polymer block (B2), and the other unit amount contained in the polymer block (B2) is small.
- the proportion of body units is preferably 40% by mass or less, more preferably 20% by mass or less, and further preferably 10% by mass or less.
- the glass transition temperature of the polymer block (B2) is preferably ⁇ 100 to 40 ° C., more preferably ⁇ 80 to 35 ° C., and further preferably ⁇ 70 to 30 ° C.
- the flexibility is excellent even in the low temperature region.
- n-butyl acrylate, 2-ethylhexyl acrylate, and n-acrylate can be easily obtained from the viewpoint that the glass transition temperature of the polymer block (B2) is within the above preferred range and the polymer block is easily available. Octyl is preferred.
- the acrylic block copolymer (II-1A) may contain two or more polymer blocks (B2).
- the acrylic acid ester forming the polymer blocks (B2) The combination of units may be the same or different.
- the difference in glass transition temperature between the polymer block (A2) and the polymer block (B2) in the acrylic block copolymer (II-1A) is preferably 70 ° C or higher, more preferably 100 ° C or higher.
- the acrylic block copolymer (II-1A) has the general formula: when the polymer block (A2) is “A2” and the polymer block (B2) is “B2”; (A2-B2) i (A2-B2) i -A2 A2- (A2-B2) i (A2-B2) i- Z (B2-A2) i- Z (Wherein i represents an integer of 1 to 30 and Z represents a coupling site (the coupling site after the coupling agent reacts with the polymer terminal to form a chemical bond)). Is preferred.
- the value of i is preferably 1 to 15, more preferably 1 to 8, and even more preferably 1 to 4. )
- the polymer block (A2) is bonded to both ends of the polymer block (B2).
- i represents an integer of 1 to 30
- k represents an integer of 2 to 30
- Z represents a coupling site (a coupling site after a coupling agent reacts with a polymer terminal to form a chemical bond))
- the value of k is preferably 2 to 15, more preferably 2 to 8, and even more preferably 2 to 4.
- the value of i is preferably 1 to 15, more preferably 1 to 8, and even more preferably 1 to 4.
- a linear block copolymer represented by (A2-B2) i , (A2-B2) i -A2, A2- (A2-B2) i is more preferable, and represented by A2-B2.
- the diblock copolymer represented by A2 and the triblock copolymer represented by A2-B2-A2 are more preferable, and the triblock copolymer represented by A2-B2-A2 are particularly preferable. These may be used alone or in combination of two or more.
- All the methyl methacrylate units contained in the acrylic block copolymer (II-1A) are preferably contained only in the polymer block (A2), and the polymer block (A2) contains only methyl methacrylate units. More preferably, The content of the methyl methacrylate unit in the acrylic block copolymer (II-1A) is preferably 35 to 60% by mass. If the content of the methyl methacrylate unit is less than 35% by mass, the adhesiveness of the acrylic block copolymer (II-1A) tends to be strong, and the acrylic block copolymer (I) may be mixed and pelletized. When manufacturing, the pellet shape may not be maintained even if cut with, for example, an underwater cutter.
- the content of the methyl methacrylate unit in the acrylic block copolymer (II-1A) is preferably 35 to 57% by mass, and 37 to 54% by mass from the viewpoint of obtaining pellets having excellent flexibility. Is more preferable.
- the acrylic block copolymer (II-1A) has a weight average molecular weight of 20,000 to 250, 000 is preferred, 30,000 to 200,000 is more preferred, 40,000 to 180,000 is more preferred, and 50,000 to 160,000 is even more preferred.
- the weight average molecular weight of the acrylic block copolymer (II-1A) is less than 30,000, the cohesive force of the acrylic block copolymer (II-1A) becomes insufficient, and the durability of the resulting molded article is reduced. Etc. may be inferior.
- problems such as occurrence of bleeding derived from the acrylic block copolymer (II-1A) may occur on the surface of the obtained molded product.
- the weight average molecular weight of the acrylic block copolymer (II-1A) exceeds 250,000, the melt viscosity may be too high, resulting in poor productivity and processability.
- the compatibility with the acrylic block copolymer (I) becomes low, the transparency of the obtained pellets and the molded article obtained from the pellets is insufficient, or the obtained pellets and the pellets The physical properties of the obtained molded product may be uneven.
- the above-mentioned acrylic block copolymer (II-1A) preferably has a molecular weight distribution (Mw / Mn) of 1.0 to 1.5.
- Mw / Mn molecular weight distribution
- the molecular weight distribution of the acrylic block copolymer (II-1A) is within the above range, the cohesive force of the acrylic block copolymer (II-1A) is likely to be increased, and a mold for molding the obtained pellets is obtained. Contamination tends to be suppressed easily.
- the molecular weight distribution is more preferably 1.0 to 1.4, further preferably 1.0 to 1.3.
- the MFR of the acrylic block copolymer (II-1A) at 230 ° C. under a load of 3.8 kg is preferably 20 g / 10 minutes or more, and more preferably 30 g / 10 minutes or more. .
- the MFR is less than the above lower limit value, the miscibility with the acrylic block copolymer (I) is not sufficient and compatibility and transparency tend to be impaired.
- the MFR is too high, the melt viscosity tends to be low, and the kneading property at the time of processing tends to be insufficient. Therefore, it is preferably 350 g / 10 minutes or less, and 300 g / 10 minutes or less. More preferably. If the MFR exceeds the above upper limit, melt kneading tends to be insufficient.
- the method for producing the acrylic block copolymers (I), (II-1), (II-1A) is not particularly limited, and these acrylic block copolymers can be produced by a production method according to a known method. .
- a method of obtaining a block copolymer having a narrow molecular weight distribution a method of living polymerization of a monomer which is a structural unit is adopted.
- living polymerization methods include a method of living polymerization using an organic rare earth metal complex as a polymerization initiator (see, for example, JP-A No. 11-335432), and an alkali metal using an organic alkali metal compound as a polymerization initiator.
- a method of living anionic polymerization in the presence of a mineral acid salt such as an alkaline earth metal salt living using an organic alkali metal compound as a polymerization initiator in the presence of an organic aluminum compound
- a mineral acid salt such as an alkaline earth metal salt
- an organic alkali metal compound living using an organic alkali metal compound as a polymerization initiator in the presence of an organic aluminum compound
- anion polymerization method see, for example, JP-A-6-93060
- ATRP atom transfer radical polymerization method
- Macromol. Chem. Phys. 2000, 201, p1108 to 1114.
- the method of living anion polymerization in the presence of an organoaluminum compound is less deactivated during the polymerization, so less homopolymer is mixed in and the resulting block copolymer is highly transparent. Further, since the polymerization conversion rate of the monomer is high, the amount of residual monomer in the block copolymer is small, and it is possible to suppress the generation of air bubbles when producing pellets containing the acrylic block copolymer. Further, the molecular structure of the polymer block composed of the methacrylic acid alkyl ester unit becomes highly syndiotactic, which has the effect of enhancing the durability of the resulting pellet containing an acrylic block copolymer.
- the acrylic block copolymer is preferably produced by a method of living anion polymerization using an organic alkali metal compound as a polymerization initiator in the presence of an organic aluminum compound.
- Examples of the living anion polymerization method in the presence of the organoaluminum compound include, for example, an organolithium compound and the following general formula (3).
- AlR 3 R 4 R 5 (3) (In the formula (3), R 3 , R 4 and R 5 each independently represent an alkyl group which may have a substituent, a cycloalkyl group which may have a substituent, or a substituent which may have a substituent.
- R 3 is any of the groups described above, and R 4 and R 5 are taken together to form an arylenedioxy group which may have a substituent.
- an ether compound such as dimethyl ether, dimethoxyethane, diethoxyethane, 12-crown-4; triethylamine, N, N, N ′, N′-tetramethyl Ethylenediamine, N, N, N ', N
- a nitrogen-containing compound such as ", N" -pentamethyldiethylenetriamine, 1,1,4,7,10,10-hexamethyltriethylenetetramine, pyridine, or 2,2'-dipyridyl is further added to obtain (meth) acryl.
- a method of polymerizing an acid ester can be adopted.
- Examples of the above-mentioned organic lithium compound include alkyllithium or alkyldilithium such as n-butyllithium, sec-butyllithium and tetramethylenedilithium; aryllithium or aryldilithium such as phenyllithium and xylyllithium; benzyllithium; Examples thereof include aralkyllithium such as dilithium or aralkyldilithium produced by the reaction of diisopropenylbenzene and butyllithium; lithium amide such as lithium diisopropylamide; and lithium alkoxide such as methoxylithium.
- alkyllithium or alkyldilithium such as n-butyllithium, sec-butyllithium and tetramethylenedilithium
- aryllithium or aryldilithium such as phenyllithium and xylyllithium
- benzyllithium examples thereof include a
- organoaluminum compound represented by the above general formula (3) isobutylbis (2,6-di-tert-butyl-4-methyl) is used in view of high living property of polymerization and easy handling.
- Phenoxy) aluminum, isobutylbis (2,6-di-tert-butylphenoxy) aluminum, isobutyl [2,2′-methylenebis (4-methyl-6-tert-butylphenoxy)] aluminum and the like are preferable.
- the acrylic random copolymer or methyl methacrylate homopolymer (II-2) that can be contained in the pellet of the present invention is an acrylic random copolymer (II-2A) containing 35% by mass or more of methyl methacrylate unit. Alternatively, it is a methyl methacrylate homopolymer (II-2B).
- the acrylic random copolymer (II-2A) preferably mainly contains a methyl methacrylate unit, more preferably contains 80% by mass or more, and preferably 90% by mass or more of a methyl methacrylate unit. More preferable.
- the acrylic random copolymer (II-2A) having a content of the methyl methacrylate unit in the above range is excellent in compatibility with the acrylic block copolymer (I), and thus the acrylic block copolymer (I ) Does not tend to impair the excellent properties of).
- the acrylic random copolymer (II-2A) may contain a monomer unit other than methyl methacrylate.
- Other monomers include, for example, ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, sec-butyl methacrylate, tert-butyl methacrylate, amyl methacrylate, Isoamyl methacrylate, n-hexyl methacrylate, 2-ethylhexyl methacrylate, pentadecyl methacrylate, dodecyl methacrylate, phenyl methacrylate, benzyl methacrylate, phenoxyethyl methacrylate, 2-hydroxyethyl methacrylate, 2 methacrylate -Ethoxyethyl, glycidyl methacrylate, allyl methacrylate
- Acrylic acid esters such as ethyl, glycidyl acrylate, allyl acrylate, cyclohexyl acrylate, norbornenyl acrylate, isobornyl acrylate; acrylic acid, methacrylic acid, maleic anhydride, male
- Saturated carboxylic acids such as ethylene, propylene, 1-butene, isobutylene, 1-octene; conjugated dienes such as butadiene, isoprene, myrcene; fragrances such as styrene, ⁇ -methylstyrene, p-methylstyrene, m-methylstyrene Group vinyl compounds: acrylamide, methacrylamide, acrylonitrile, methacrylonitrile, vinyl acetate, vinyl pyridine, vinyl ketone, vinyl chloride, vinylidene chloride, vinylidene fluoride and the like.
- olefins such as ethylene, propylene, 1-butene, isobutylene, 1-octene
- conjugated dienes such as butadiene, isoprene, myrcene
- fragrances such as styrene, ⁇ -methylstyrene, p-methylstyrene, m-methyls
- methacrylic acid ester (excluding methyl methacrylate), acrylic acid ester, and methacrylic acid are preferable.
- methyl acrylate is more preferable from the viewpoints of superior anti-sticking property and availability.
- the content of the other monomer unit is preferably 15% by mass or less, more preferably 12% by mass or less, and further preferably 10% by mass or less.
- the methyl methacrylate homopolymer (II-2B) is a polymer containing only methyl methacrylate units, and does not contain other monomer units.
- the methyl methacrylate homopolymer (II-2B) is excellent in compatibility with the acrylic block copolymer (I), and tends to further impair the excellent properties of the acrylic block copolymer (I). .
- the stereoregularity of the acrylic random copolymer (II-2A) or methyl methacrylate homopolymer (II-2B) is not particularly limited, and is preferably isotactic, heterotactic or syndiotactic. Can be used.
- the acrylic random copolymer (II-2A) or methyl methacrylate homopolymer (II-2B) has an MFR of 10 to 400 g / 10 minutes under the conditions of 230 ° C. and a load of 3.8 kg. preferable.
- MFR 10 to 400 g / 10 minutes
- the melt viscosity tends to be high, and the anti-sticking property tends to be difficult to be exhibited.
- MFR exceeds 400 g / 10 minutes, the kneadability during processing tends to be insufficient because the melt viscosity is low.
- the weight average molecular weight of the acrylic random copolymer (II-2A) or methyl methacrylate homopolymer (II-2B) is preferably 50,000 to 150,000.
- the weight average molecular weight is in the above range, the compatibility with the acrylic block copolymer (I) is good, and the transparency is high in the case of pellets or molded products.
- the weight average molecular weight is more preferably 60,000 to 130,000, and 70,000 to 120. More preferably, it is 1,000.
- the above acrylic random copolymer (II-2A) may be a mixture of two or more copolymers having different compositions. Further, the acrylic random copolymer (II-2A) or methyl methacrylate homopolymer (II-2B) was obtained by a mixture of two or more kinds of polymers having different molecular weights or stereoregularities, and different production methods. It may be a mixture of polymers.
- the above acrylic random copolymer (II-2A) or methyl methacrylate homopolymer (II-2B) (hereinafter, also referred to as (II-2A) or (II-2B) is also referred to as polymer (II-2).
- the method for producing) is not particularly limited, but examples thereof include a solution polymerization method, an emulsion polymerization method, and a bulk polymerization method.
- a radical polymerization initiator is preferable as the initiator used during the polymerization, and examples of the radical polymerization initiator include azo compounds such as azobisisobutyronitrile (AIBN) and azobis ⁇ -dimethylvaleronitrile; benzoyl peroxide; Cumyl peroxide, peroxyneodecanoate, diisopropyl peroxydicarbonate, t-butyl cumyl peroxide, cumene hydroperoxide, t-butyl hydroperoxide, cyclohexanone peroxide, methyl ethyl ketone peroxide, dicumyl peroxide, lauroyl Examples thereof include peroxides such as peroxides.
- the radical polymerization initiator is usually used in an amount of 0.05 to 0.5 parts by mass with respect to 100 parts by mass of all the monomers used for producing the polymer (II-2).
- the polymerization is usually carried out at a temperature of 50 to 140 ° C. for usually 2 to 20 hours, and a chain transfer agent can be used for controlling the molecular weight of the polymer (II-2).
- the chain transfer agent is usually used in the range of 0.005 to 0.5% by mass based on all the monomers used for producing the polymer (II-2).
- Examples of commercially available products of the acrylic random copolymer (II-2A) or the methyl methacrylate homopolymer (II-2B) include “Parapet (registered trademark) H1000B” (MFR: 22 g / 10 minutes (230 ° C., 37.3N)), “Parapet (registered trademark) GF” (MFR: 15g / 10 minutes (230 ° C, 37.3N)) [All are trade names, manufactured by Kuraray Co., Ltd.], "ACRYREX CM-211" (MFR : 16 g / 10 min (230 ° C., 37.3 N)) [manufactured by CHIMEI] and the like.
- the pellet of the present invention contains the acrylic block copolymer (I) and the acrylic polymer (II), and the mass ratio (I) / (II) is 90/10 to 40/60.
- the excellent properties of the acrylic block copolymer (I) are not impaired, A pellet with anti-sticking property is obtained.
- the mass ratio (I) / (II) is preferably 85/15 to 50/50 from the viewpoint of excellent anti-sticking performance and more effectively exhibiting the excellent properties of the acrylic block copolymer (I). , 80/20 to 60/40 are more preferable.
- the total content of the acrylic block copolymer (I) and the acrylic polymer (II) contained in the pellet of the present invention is preferably 80% by mass or more, more preferably 90% by mass or more. Is particularly preferably 100% by mass.
- the acrylic block copolymer (I) and the acrylic block copolymer (I) are used as long as the characteristics of the acrylic block copolymer (I) and the acrylic polymer (II) are not impaired.
- other components such as additives may be blended.
- the pellets of the present invention are obtained by, for example, melt-extruding a mixture of the acrylic block copolymer (I), the acrylic polymer (II), and other components that are added as necessary into strands to form underwater. It can be manufactured by cutting with a cutter, a center hot cutter, a strand cutter, or the like. The melt extrusion is usually performed at 130 to 240 ° C.
- the shape of the pellet of the present invention is not particularly limited as long as a molded body described later can be manufactured, but usually has a substantially columnar shape or a substantially spherical shape (ellipsoidal shape).
- the maximum diameter of the pellet obtained in the present invention is preferably 2 to 8 mm, more preferably 2 to 6 mm.
- the maximum diameter of the pellet can be determined by measuring the maximum cylinder height in the case of a substantially cylindrical shape and the longest side of an ellipsoid in the case of a substantially spherical shape according to each shape by using a commercially available length gauge.
- An anti-sticking agent may be attached to the pellets of the present invention.
- the method for attaching the anti-sticking agent to the surface of the pellet include a method of directly mixing the pellet and the anti-sticking agent.
- a device for directly mixing for example, a horizontal cylinder type mixer, a V type mixer, a double cone type mixer, a ribbon type mixer, a cone type screw mixer, a high speed fluid type mixer, a rotary disk type mixer, An airflow stirring type mixer, a gravity drop type mixing machine, a stirring type mixing machine and the like can be mentioned.
- the anti-sticking agent may be attached to the pellet by throwing the pellet in an aqueous solution containing the anti-sticking agent.
- the anti-adhesion agent for example, Alflo H50T (manufactured by NOF CORPORATION, ethylenebisstearic acid amide), Aerosil R972 (manufactured by Nippon Aerosil Co., Ltd., hydrophobic silicon dioxide), talc, calcium carbonate, acrylic resin fine particles, etc. are used. be able to.
- an anti-sticking agent containing no ethylenebisstearic acid amide, talc, or calcium carbonate. From the viewpoint of achieving both anti-sticking performance and transparency, the amount of these anti-sticking agents added is preferably 200 to 2000 ppm based on the mass of the pellets, and particularly preferably 300 to 1700 ppm. preferable.
- the molded product of the present invention is a molded product produced from the above pellets as a raw material by various molding methods.
- the raw material of the molded article of the present invention in addition to the above pellets, depending on the purpose and the like, other polymers, softeners, heat stabilizers, light stabilizers, ultraviolet absorbers, antioxidants, lubricants, electrostatic Inhibitor, flame retardant, foaming agent, coloring agent, dyeing agent, fluorescent agent, refractive index adjusting agent, filler, curing agent, anti-sticking agent, conductivity imparting agent, thermal conductivity imparting agent, electromagnetic wave shielding imparting agent, prevention Ingredients such as additives such as fungi and the like may be included as necessary. These components, which are contained as necessary, may be contained in the molded product either individually or in combination of two or more.
- the above pellets are composed of an acrylic block copolymer, they have excellent weather resistance, but by adding an antioxidant, an ultraviolet absorber, and a light stabilizer to the molded product of the present invention, higher weather resistance can be obtained. Sex can be expressed.
- antioxidants include phenolic antioxidants and phosphorus antioxidants.
- the ultraviolet absorber include benzotriazole type ultraviolet absorbers and the like.
- the light stabilizer include hindered amine light stabilizers. These may be contained in the molded product alone or in combination of two or more. Among them, it is a preferable embodiment that the molded body contains all of the antioxidant, the ultraviolet absorber and the light stabilizer.
- the addition amount of each agent in the molded body is preferably 0.01 to 1.0 part by mass, and more preferably 0.03 to 0.60 part by mass, relative to 100 parts by mass of the pellet.
- the lubricant is added for the purpose of imparting lubricity to the surface of the molded product and enhancing the scratch preventing effect.
- the lubricant include unsaturated fatty acid amides such as oleic acid amide and erucic acid amide; saturated fatty acid amides such as behenic acid amide and stearic acid amide, butyl stearate, stearyl alcohol, stearic acid monoglyceride, sorbitan monopalmitate, Examples thereof include sorbitan monostearate, mannitol, stearic acid, zinc stearate, hydrogenated castor oil, stearic acid amide, oleic acid amide, ethylenebisstearic acid amide, silicone oil, and modified silicone oils.
- silicone oils and modified silicone oils are preferable, and non-reactive silicone oils whose side chains are modified with polyether are particularly preferable.
- the lubricant may be contained in the molded product alone or in combination of two or more.
- the amount of the lubricant added to the molded body is preferably 0.01 to 1 part by mass, and more preferably 0.03 to 0.30 part by mass with respect to 100 parts by mass of the pellet.
- Examples of other polymers include acrylic resins such as polymethylmethacrylate and (meth) acrylic acid ester copolymer; polyethylene, ethylene-vinyl acetate copolymer, polypropylene, polybutene-1, poly-4-methyl. Olefin resins such as pentene-1, polynorbornene; ethylene ionomers; polystyrene, styrene-maleic anhydride copolymers, high impact polystyrene, AS resins, ABS resins, AES resins, AAS resins, ACS resins, MBS resins, etc.
- acrylic resins such as polymethylmethacrylate and (meth) acrylic acid ester copolymer
- polyethylene ethylene-vinyl acetate copolymer
- polypropylene polybutene-1
- poly-4-methyl Olefin resins
- Olefin resins such as pentene-1, polynorbornene
- ethylene ionomers polyst
- Styrene resin styrene-methyl methacrylate copolymer
- polyester resin such as polyethylene terephthalate, amorphous polyethylene terephthalate (PET-G), polybutylene terephthalate, polylactic acid; nylon 6, nylon 66, polyamide elastomer, etc.
- Liamide Liamide; polycarbonate; polyvinyl chloride; polyvinylidene chloride; polyvinyl alcohol; ethylene-vinyl alcohol copolymer; polyacetal; polyvinylidene fluoride; polyurethane; modified polyphenylene ether; polyphenylene sulfide; silicone rubber modified resin; acrylic rubber; silicone rubber Styrene thermoplastic elastomers such as SEPS, SEBS, SIS; olefin rubbers such as IR, EPR and EPDM.
- the other polymer may be contained in the molded product alone or in combination of two or more.
- the filler examples include inorganic fibers such as glass fibers and carbon fibers, and organic fibers; inorganic fillers such as calcium carbonate, talc, titanium oxide, silica, clay, barium sulfate, magnesium carbonate, magnesium hydroxide, and aluminum hydroxide. Agents; carbon black and the like can be mentioned.
- the filler may be contained in the molded product singly or in combination of two or more. When the inorganic fiber and the organic fiber are contained, durability is imparted to the obtained molded product. When the inorganic filler is contained, heat resistance and weather resistance are imparted to the obtained molded product. Further, when titanium oxide is contained, the obtained molded product is likely to be provided with the light shielding property.
- the addition amount of titanium oxide in the molded body is preferably 20 to 250 parts by mass, and more preferably 30 to 150 parts by mass with respect to 100 parts by mass of the pellets.
- the molded body of the present invention can be suitably used as a curable molded body.
- the curing agent include a photo-curing agent such as a UV curing agent and a thermal curing agent.
- examples thereof include benzoins, benzoin ethers, benzophenones, anthraquinones, benzyls, acetophenones, and diacetyls. .
- One type of the curing agent may be contained in the molded body alone, or two or more types thereof may be contained in the molded body.
- acrylic acid methacrylic acid, ⁇ -cyanoacrylic acid, ⁇ -halogenated acrylic acid, crotonic acid, cinnamic acid, sorbic acid, maleic acid, itaconic acid, and acrylic acid ester.
- Esters such as methacrylic acid ester, crotonic acid ester, maleic acid ester; acrylamide; methacrylamide; acrylamide derivatives such as N-methylolacrylamide, N-hydroxyethylacrylamide, N, N- (dihydroxyethyl) acrylamide; N-methylolmethacryl Methacrylamide derivatives such as amides, N-hydroxyethylmethacrylamide, N, N- (dihydroxyethyl) methacrylamide; vinyl esters; vinyl ethers; mono-N-vinyl derivatives; monomers such as styrene derivatives; The oligomer or the like containing the above-mentioned monomer as a constituent may be further contained in the raw material of the molded body obtained in the present invention.
- esters such as acrylic acid esters, methacrylic acid esters, crotonic acid esters, maleic acid esters; vinyl ethers; styrene derivatives; and oligomers containing the above monomers as constituent components.
- a cross-linking agent composed of a bifunctional or higher functional monomer or oligomer may be further contained.
- pellets of the present invention may be used as they are as the raw material of the molded article of the present invention.
- the raw material of the molded article of the present invention in addition to the pellets of the present invention, when a component such as another polymer or an additive that is added as necessary is included, each component contained in the raw material, a method of once melt mixing these raw materials is recommended.
- the melt mixing can be performed by a known device such as a kneader ruder, an extruder, a mixing roll or a Banbury mixer.
- a twin-screw extruder from the viewpoint of improving the kneadability and compatibility of the pellets of the present invention with components added as necessary.
- the temperature at the time of mixing may be appropriately adjusted depending on the pellets of the present invention and the components to be added as necessary, and it is generally preferable to mix at a temperature within the range of 110 ° C to 300 ° C.
- the raw material of the molded body in addition to the pellets of the present invention, when a component such as other polymer or an additive added as necessary is contained, the raw material of the molded body Can be obtained in any form such as pellets, powder and the like.
- the molded body of the present invention can be obtained by molding the raw material of the molded body by a commonly used molding method.
- the molding method include a melt molding processing method through heat melting such as extrusion molding, injection molding, compression molding, blow molding, calender molding, and vacuum molding, and a solution casting method.
- the melt molding method is preferable from the viewpoint of handleability of the pellets of the present invention.
- any shape such as a mold, a pipe, a sheet, a film, a fibrous material, a laminate having a polymer layer containing the acrylic block copolymer (I) and the acrylic polymer (II), and the like can be obtained.
- a molded body is obtained.
- the raw material of the molded body (for example, the pellet of the present invention) is extrusion-molded and injection-molded to obtain the acrylic block copolymer (I) and the acrylic block copolymer.
- a monolayer containing the polymer (II) can be produced.
- the extrusion molding method include a T-die method and an inflation method. Among these, the T-die method is preferable.
- a single layer body can be produced by heating and melting the raw material of the molded body (for example, the pellet of the present invention) and extruding from the T-die.
- the acrylic block copolymer (I) and the acrylic block copolymer (I) are prepared by extrusion molding the raw material of the molded product (for example, the pellets of the present invention) into a base material layer.
- a laminate having a polymer layer containing the polymer (II) and a base material layer can be produced.
- the extrusion molding method include a T-die method and an inflation method. Among these, the T-die method is preferable.
- the laminate can be produced without using a solvent, and can be produced with relatively simple production equipment.
- the manufacturing process can be simplified and the manufacturing cost of the laminate can be reduced.
- the raw material (for example, the pellet of the present invention) of the above-mentioned molded body is heated and melted and extruded from the T-die onto the base material layer to form a polymer on the base material layer.
- a laminate including a polymer layer containing the acrylic block copolymer (I) and the acrylic polymer (II) and a base material layer can be prepared.
- both the raw material of the polymer layer and the raw material of the base material layer are heated and melted, and simultaneously extruded to form an acrylic resin.
- a laminate including a polymer layer containing the block copolymer (I) and the acrylic polymer (II) and a base material layer can be prepared.
- the raw material of the molded body is extruded from the die at a temperature of 140 to 260 ° C. in order to obtain good adhesiveness with the base material layer.
- examples of the base material layer include synthetic polymer compound films and sheets, metal foils, papers, cellophane, non-woven fabrics, and woven fabrics.
- synthetic polymer compounds include polyethylene terephthalate, polyethylene naphthalate, triacetyl cellulose, polyamide, polyvinyl alcohol, polycarbonate, cycloolefin resin, styrene-methyl methacrylate copolymer, polyvinyl chloride, ethylene-vinyl acetate copolymer.
- examples thereof include polymers, polymethylmethacrylate, polyethylene, polypropylene, and mixtures of two or more of these polymers, but are not limited thereto.
- the synthetic polymer compound may be a copolymer in which various monomers are copolymerized. These films and sheets may be vapor-deposited with aluminum, vapor-deposited with alumina, or vapor-deposited with silicon dioxide. Further, these synthetic polymer compound films and sheets may be further printed with urethane ink or the like.
- Examples of metal foils include aluminum foil and copper foil, and examples of papers include kraft paper, fine paper, glassine paper, and the like.
- Examples of the non-woven fabric include non-woven fabrics made of aramid fiber, glass fiber, cellulose fiber, nylon fiber, vinylon fiber, polyester fiber, polyolefin fiber, rayon fiber and the like.
- Examples of the woven cloth include aramid fiber, glass fiber, cellulose fiber, nylon fiber, vinylon fiber, polyester fiber, polyolefin fiber, rayon fiber and the like.
- Examples of the structure of the laminate include a two-layer structure including a polymer layer containing an acrylic block copolymer (I) and an acrylic polymer (II) and a base material layer, two base material layers and an acrylic base material.
- Three-layer structure of a block copolymer (I) and a polymer layer containing an acrylic polymer (II) base layer / polymer layer / base layer), base layer and acrylic block copolymer ( I) and two different polymer layers (a) containing the acrylic polymer (II), the polymer layer (b), and the base material layer (four base material layers (base material layer / polymer layer (a) / Other than the polymer layer (b) / base material layer), the base material layer and the polymer layer (a) containing the acrylic block copolymer (I) and the acrylic polymer (II), and the pellets of the present invention.
- polymer layer (c) made of material and base material layer (base material layer / polymer layer (a) / polymer layer (c) / base material layer)
- base material layer / polymer layer (a) / polymer layer (c) / base material layer) A three-layer structure comprising three base layers and two polymer layers containing the acrylic block copolymer (I) and the acrylic polymer (II) (base layer / polymer layer / base layer / weight). Examples include, but are not limited to, a united layer / base material layer).
- the adhesive surface of the base material layer in contact with the polymer layer containing the acrylic block copolymer (I) and the acrylic polymer (II) may be oxidized by air or ozone gas. Further, in order to enhance the adhesiveness with the polymer layer, a known surface treatment such as anchor coating agent treatment, corona discharge treatment, flame treatment, plasma treatment or the like may be performed on the adhesive surface of the base material layer. Further, an anchor layer may be formed on at least one surface of the polymer layer and the base material layer by using an adhesive resin or the like.
- the resin used for the anchor layer examples include ethylene-vinyl acetate copolymers, ethylene-methyl methacrylate copolymers, ionomers, block copolymers (for example, styrene-based triblock copolymers such as SIS and SBS, and Diblock copolymers, etc.), ethylene-acrylic acid copolymers, ethylene-methacrylic acid copolymers and the like.
- the anchor layer may be one layer or two or more layers.
- the method of forming the anchor layer is not particularly limited, and examples thereof include a method of forming a anchor layer by applying a solution containing the above resin to the base material layer, and a composition containing the above resin to be the anchor layer and the like being melted by heating. Then, a method of forming an anchor layer on the surface of the base material layer using a T-die or the like can be mentioned.
- the co-extrusion processing method which is an example of the T-die method, may be either a feed block method or a multi-manifold method, whereby a multilayer structure can be obtained, and the base layer and the acrylic block copolymer (I) and A two-kind two-layer laminate comprising a polymer layer containing an acrylic polymer (II), a three-kind three-layer laminate having an intermediate layer between the base material layer and the polymer layer, and the like can be prepared. it can.
- various synthetic polymer compounds can be mentioned.
- a suitable example of the synthetic polymer compound is polyolefin and the like.
- polystyrene-based material examples include low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear low-density polyethylene, ethylene- ⁇ olefin copolymer, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, Examples thereof include ethylene-methyl methacrylate copolymer, ethylene-n-butyl acrylate copolymer, polypropylene (homopolymer, random copolymer, block copolymer). These polyolefin-based materials may be used alone or as a mixture / composition in any combination. In particular, polypropylene, which is a block copolymer, is preferable as the material for the base material layer.
- the base material layer may be blended with additives such as pigments, antioxidants, stabilizers, and ultraviolet absorbers, if necessary.
- the base material layer is not limited to a single layer, and may have a plurality of base material layers.
- the total thickness of the base material layer composed of a single layer or a plurality of layers is, for example, preferably 20 ⁇ m or more and 100 ⁇ m or less.
- the above-mentioned laminated body may have an intermediate layer.
- the resin that can be used as the intermediate layer is, for example, an ethylene-vinyl acetate copolymer, an ethylene-methyl methacrylate copolymer, an ionomer, a block copolymer (for example, a styrene-based triblock copolymer such as SIS or SBS, and a diblock copolymer).
- Block copolymers, etc. ethylene-acrylic acid copolymers, ethylene-methacrylic acid copolymers and the like.
- the above-mentioned intermediate layer may be one layer or two or more layers, and it may be used at the same time as the base layer and the polymer layer containing the acrylic block copolymer (I) and the acrylic polymer (II). It can be formed by extrusion.
- the molded product of the present invention is a multi-layered product such as a mold or a sheet
- a raw material of the molded product for example, the pellet of the present invention
- a polymer layer (Y) made of a material other than the pellet of the present invention can be produced.
- the injection molding method include two-color molding and insert molding.
- polymer constituting the polymer layer (Y) made of a material other than the pellet of the present invention include, for example, polymethylmethacrylate and (meth) acrylic acid ester.
- Acrylic resins such as copolymers; olefin resins such as polyethylene, ethylene-vinyl acetate copolymer, polypropylene, polybutene-1, poly-4-methylpentene-1, polynorbornene; ethylene ionomers; polystyrene, styrene Styrene resin such as maleic anhydride copolymer, high impact polystyrene, AS resin, ABS resin, AES resin, AAS resin, ACS resin, MBS resin; styrene-methyl methacrylate copolymer; polyethylene terephthalate, amorphous polyethylene Terephthalate (PET-G), Polybutylene terephthalate Polyester resins such as polylactic acid and poly
- this multilayer body is It may have other layers.
- the layer (Y) may be, for example, a layer (YI) containing a polar resin.
- a polar resin examples include acrylic resins such as polymethylmethacrylate and (meth) acrylic acid ester copolymer; polystyrene, styrene-maleic anhydride copolymer, high-impact polystyrene, AS resin, ABS resin, AES.
- Styrene resin such as resin, AAS resin, ACS resin, MBS resin; styrene-methyl methacrylate copolymer; polyester resin such as polyethylene terephthalate, amorphous polyethylene terephthalate (PET-G), polybutylene terephthalate, polylactic acid; Polyamide such as nylon 6, nylon 66, polyamide elastomer; polycarbonate; polyvinyl chloride; polyvinylidene chloride; polyvinyl alcohol; ethylene-vinyl alcohol copolymer; polyacetal; polyvinylidene fluoride; Tan; modified polyphenylene ether; polyphenylene sulfide; silicone rubber-modified resins; acrylic rubber; silicone rubber.
- Styrene resin such as resin, AAS resin, ACS resin, MBS resin; styrene-methyl methacrylate copolymer; polyester resin such as polyethylene terephthalate, amorphous polyethylene terephthalate (PET-G),
- the layer (Z) and the layer (YI) are adjacent to each other.
- the multilayer body has a layer (Z) excellent in low tack, transparency, flexibility and impact absorption. Even when a highly rigid polar resin is used for the layer (YI) containing the polar resin, it is possible to have the characteristics of being excellent in flexibility and shock absorption.
- the thickness of the layer (Z) and the layer (Y) constituting the multilayer body is not particularly limited, but the thickness of the layer (Z) is 0.1 to 10 mm from the viewpoint that the molded body is excellent in flexibility and impact absorption. Is more preferable, 0.3 to 5 mm is more preferable, 0.5 to 3 mm is further preferable, 0.7 to 2 mm, and further 1 to 1.5 mm may be used.
- the thickness of the layer (Y) is preferably 0.3 to 10 mm, more preferably 0.5 to 5 mm, even more preferably 1 to 3 mm.
- a method for producing the above-mentioned multilayer body for example, a method in which the layer (Z) and the layer (Y) are separately molded in advance, and these are laminated (method 1); A method of forming a layer (Z) by arranging the pellets of the present invention in a molten state in the layer (Y) that has been melted (Method 2); And a method of forming the layer (Y) (method 3).
- methods 2 and 3 are preferable because the adhesive force between the layer (Z) and the layer (Y) is improved, and the method 2 is more preferable because the target molded article can be easily obtained. .
- the pellets of the present invention have excellent melt fluidity, it is preferable to form the layer (Z) by injection molding.
- the layer (Y) that has been molded in advance is placed in a mold and then melted. It is more preferable to employ insert molding, in which the pellets of the present invention in the state of being injected.
- the use of the molded article of the present invention is not particularly limited, but it is excellent in heat resistance, transparency, and flexibility, and the appearance of the molded article is excellent, so that the optical field, the food field, the medical field, the consumer field, the automotive field, the electric field -It can be used in a wide variety of applications such as the electronic field and the construction field.
- Examples of the shape of the molded body include various shapes such as pellets, sheets, plates, pipes, tubes, belts, hoses, rod-shaped bodies, and granular bodies.
- liquid crystal display liquid crystal display light guide film / sheet
- flat panel display flat panel display light guide film / sheet
- plasma display plasma display light guide Film sheet
- retardation film sheet polarizing film sheet
- polarizing plate protective film sheet wave plate
- light diffusion film sheet prism film sheet
- reflection film sheet antireflection film sheet
- field of view Suitable for magnifying film / sheet, anti-glare film / sheet, brightness enhancement film / sheet, display element substrate for liquid crystal and electroluminescence, touch panel, light guide film / sheet for touch panel, spacer between various front plates and various modules, etc. Applicable.
- liquid crystal display elements such as mobile phones, digital information terminals, pagers, navigation, in-vehicle liquid crystal displays, liquid crystal monitors, dimming panels, OA equipment displays, AV equipment displays, electroluminescence display elements, touch panels, etc. Can also be used for
- interior / exterior members for construction curtain walls, roof members, roof materials, window members, rain gutters, exteriors, wall materials, floor materials It can be suitably applied to structural materials, coated steel plates, coated plywood, sealing packings for doors and window frames, and the like.
- anti-vibration rubbers such as anti-vibration rubbers, mats, seats, cushions, dampers, pads, mount rubbers, damping materials; footwear materials such as sports shoes and fashion sandals; televisions, stereos, vacuum cleaners, refrigerators, etc.
- the laminate which is one type of the molded product of the present invention, can be used for various purposes.
- surface protection, masking, packaging / packaging, office work, label, decoration / display, bookbinding, dicing tape, medical / hygiene, laminated glass, glass shatterproof, electrical insulation examples thereof include adhesive tapes and adhesive films for holding and fixing electronic devices, for semiconductor production, for optical display films, for adhesive optical films, for electromagnetic wave shielding, or for sealing materials for electric and electronic parts. Specific examples will be given below.
- a surface protection application it can be used for various materials such as metal, plastic, rubber, wood, etc.
- automobile surface optical member Can be used.
- the automobile member include a coating outer plate, a wheel, a mirror, a window, a light, a light cover and the like.
- the optical member various image display devices such as a liquid crystal display, an organic EL display, a plasma display and a field emission display; a polarizing film, a polarizing plate, a retardation plate, a light guide plate, a diffusion plate, an optical disk constituent film such as a DVD; ⁇ Precision fine coated face plate for optical applications.
- Masking applications include masking during the manufacture of printed circuit boards and flexible printed circuit boards; masking during plating and soldering of electronic devices; manufacturing of vehicles such as automobiles, painting of vehicles and buildings, textile printing, and civil engineering work masking. Etc.
- the packaging applications include heavy-duty packaging, export packaging, cardboard box sealing, can sealing, etc.
- Office applications include general office work, sealing, book repair, drafting, memo applications, and the like.
- Examples of the label use include price, product display, luggage tag, POP, sticker, stripe, name plate, decoration, advertisement, marking film, and the like.
- Labels include paper, processed paper (aluminum deposition processing, aluminum lamination processing, varnish processing, resin processing, etc.), paper such as synthetic paper; cellophane, plastic materials, cloth, wood and metal
- Examples of the label include a film and the like as a base material layer.
- Examples of the base material layer include high-quality paper, art paper, cast paper, thermal paper, foil paper, polyethylene terephthalate film, polyvinyl chloride film, OPP film, polylactic acid film, synthetic paper, synthetic paper thermal, and overlaminate film. Is mentioned.
- Examples of the adherend of the above label include plastic products such as plastic bottles and foam plastic cases; paper and cardboard products such as cardboard boxes; glass products such as glass bottles; metal products; ceramics and other inorganic material products.
- Decorative applications include display of danger signs, line tape, wiring marking, phosphorescent tape, reflective sheet, etc.
- a Bright-infrared absorption film, functional composite optical film, ITO bonding film, impact resistance imparting film, visibility improving film and the like an optical film having an adhesive layer formed on at least part or all of one or both sides Can be mentioned.
- Such an adhesive optical film also includes a protective film used for surface protection of the optical film.
- the adhesive optical film is suitably used for various image display devices such as liquid crystal display devices, PDPs, organic EL display devices, electronic papers, game machines and mobile terminals.
- Examples of applications for holding and fixing electronic devices include carrier tape, packaging, fixing of cathode ray tubes, splicing, rib reinforcement, and the like.
- Examples of semiconductor manufacturing include protection of silicone wafers.
- analgesic and anti-inflammatory agents plasters, paps
- cold patches antipruritic patches
- keratin softeners etc.
- tape applications such as hemostatic bond, tape for human excrement disposal equipment (artificial anus fixing tape), suture tape, antibacterial tape, fixed taping, self-adhesive bandage, oral mucous membrane adhesive tape, sports tape, hair removal tape, etc. Beauty applications such as face packs, moisturizing sheets, exfoliating packs and the like; Bonding of sanitary materials such as diapers and pet sheets; cooling sheets, heating warmers, dustproofing, waterproofing, insect pest capturing and the like.
- Examples of applications for encapsulating materials for electronic and electrical parts include liquid crystal displays, organic EL displays, organic EL lighting, and solar cells.
- laminated glass it is effectively used for automobile windshield, automobile side glass, automobile sunroof, automobile rear glass, head-up display glass, etc.
- Weight average molecular weight (Mw), number average molecular weight (Mn), and molecular weight distribution (Mw / Mn) The weight average molecular weight and number average molecular weight of the acrylic block copolymer were determined by gel permeation chromatography (hereinafter abbreviated as GPC) in terms of polystyrene-equivalent molecular weight, and the molecular weight distribution was calculated from these values.
- GPC gel permeation chromatography
- ⁇ Device GPC device "HLC-8020" manufactured by Tosoh Corporation Separation column: "TSKgel GMHXL", “G4000HXL” manufactured by Tosoh Corporation And “G5000HXL” are connected in series-Eluent: Tetrahydrofuran-Eluent flow rate: 1.0 ml / min-Column temperature: 40 ° C ⁇ Detection method: Differential refractive index (RI)
- Each monomer unit is assigned to a hydrogen atom (—O—C H 2 —CH 2 —CH 2 —CH 3 ) bonded to a carbon atom adjacent to an oxygen atom contained in the ester group of the unit, and from the ratio of these integral values.
- the molar ratio of each of the polymer blocks was calculated by converting the molar ratio thereof into a mass ratio based on the molecular weight of the monomer unit.
- melt flow rate The melt flow rate (MFR) of the polymers obtained in Examples and Comparative Examples was measured according to ISO 1133 at 230 ° C. under a load of 3.8 kg for 10 minutes.
- Pellets sticking resistance evaluation The pellets obtained in Examples and Comparative Examples were transferred to a 100 ml plastic beaker, a weight was placed so that the load per unit area was 103 g / cm 2 , and the pellet was placed in a dryer at 40 ° C for 1 week. The state of sticking when the pellets were taken out was visually observed.
- AA Pellets are completely loosened
- A Pellets are partly lumps, but they easily collapse when touched with fingers
- B Pellets are partly lumps and do not easily collapse when touched with fingers
- Block structure weight average molecular weight (Mw), molecular weight distribution (Mw / Mn), and polymer block (of the acrylic triblock copolymers (I-1) to (I-2) obtained in Production Examples 1 and 2 above.
- Table 1 shows the total content of the PMMA polymer block (polymer block consisting of 100% by mass of methyl methacrylate unit) constituting A1), the constituent components of the polymer block (B1), and the mass ratio in the polymer block (B). Shown in.
- PMMA means a polymer block composed of 100% by mass of methyl methacrylate unit
- PMA / PnBA means a block composed of only methyl acrylate unit and n-butyl acrylate unit.
- Table 2 shows (Mw / Mn), total content of methyl methacrylate units, MFR under conditions of a temperature of 230 ° C. and a load of 3.8 kg.
- PMMA means a polymer block composed of 100% by mass of methyl methacrylate unit
- PnBA means a block composed of 100% by mass of n-butyl acrylate unit.
- Table 3 shows the obtained acrylic triblock copolymer (I-1) or (I-2) and acrylic triblock copolymer (II-1A-1) or (II-1A-2).
- a mixture which was dry-blended in advance in a ratio was prepared, and this mixture was melt-kneaded by a twin-screw extruder (“JSW-JBaII” manufactured by Japan Steel Works, Ltd.).
- JSW-JBaII manufactured by Japan Steel Works, Ltd.
- the obtained melt-kneaded product was extruded from a twin-screw extruder and pelletized by an underwater cut method to obtain pellets (A'-1, 2, 6 to 12).
- Aerosil R972 was dusted to a concentration shown in Table 3 with respect to the mass of the pellets (A'-1, 2, 6-12), and the pellets (A-1, 2, 6-12) were obtained. Obtained. The transparency of the obtained pellet was as good as "a”. Further, regarding the anti-sticking property, it was "A” or "AA”, and it was found that the sticking resistance was good, and the obtained pellets were excellent in handleability. The results are shown in Table 3.
- Aerosil R972 was dusted so as to have the concentration shown in Table 3 with respect to the mass of the pellets (A'-3 to 5) to obtain pellets (A-3 to 5).
- the transparency of the obtained pellet was as good as “a”.
- the anti-sticking property it was "AA”, which was good because it did not easily stick, and the obtained pellets were found to be excellent in handleability.
- Table 3 The results are shown in Table 3.
- the obtained melt-kneaded product was extruded from a twin-screw extruder and pelletized by an underwater cut method to obtain pellets (A'-13 to 15). Thereafter, Aerosil R972 was dusted to a concentration shown in Table 3 with respect to the mass of the pellets (A'-13 to 15) to obtain pellets (A-13 to 15).
- the transparency of the obtained pellets was a little cloudy and was "b", but the anti-sticking property was "A" or "AA", which was not easily sticky and was good. It turned out to be excellent in sex.
- Table 3 The results are shown in Table 3.
- Example 16 In the same manner as in Example 12 except that the anti-tacking agent was changed from Aerosil R972 to the acrylic resin fine particles obtained in Production Example 6, the mixture was dusted to a concentration shown in Table 3 and pelleted (A- 27) was obtained. The transparency of the obtained pellet was as good as "a”. Also, regarding the anti-sticking property, it was "AA”, which was good because it did not easily stick, and the obtained pellets were found to be excellent in handleability. The results are shown in Table 3.
- the obtained melt-kneaded product was extruded from a twin-screw extruder and pelletized by an underwater cut method to obtain pellets (A'-23 to 25). Thereafter, Aerosil R972 was dusted to a concentration shown in Table 3 with respect to the mass of the pellets (A'-23 to 25) to obtain pellets (A-23 to 25).
- the transparency of the obtained pellet was "b", which had a slightly cloudy feeling. Also, regarding the anti-sticking property, it was found to be "B”, and the sticking was easy, and the obtained pellet was inferior in handleability.
- Table 3 The results are shown in Table 3.
- the transparency of the obtained pellets was "b” because the amount of the anti-sticking agent added was large and there was a slight cloudiness. Also, regarding the anti-sticking property, it was found to be "B”, and the sticking was easy, and the obtained pellet was inferior in handleability. The results are shown in Table 3.
- Example 17 The pellet (A-9) obtained in Example 9 was put into a single-screw extruder from a hopper, heated and melted under a temperature condition of 180 ° C., and PET was obtained from a T-die arranged at the tip of the single-screw extruder.
- a polymer layer formed from a pellet (A-9) having a width of 300 mm and a thickness of 100 ⁇ m is laminated on a film (thickness: 250 ⁇ m, “E5001” manufactured by Toyobo Co., Ltd.) (T-die method), and further silicon release-treated PET (Thickness: 50 ⁇ m, “A31” manufactured by Teijin Solutions Ltd.) so that the release-treated surface was in contact with the surface of the polymer layer to prepare a laminated film.
- the take-up speed was 2.0 m / min.
- pellets (A-9) used were excellent in anti-sticking property, they could be supplied to the single-screw extruder at a stable speed without causing blocking, and the thickness unevenness was as small as ⁇ 5 ⁇ m and high accuracy was achieved.
- a laminated film could be obtained.
- the obtained film was a highly flexible film having high transparency and excellent adhesion resistance.
- Example 18 A laminated film was produced in the same manner as in Example 17, except that the thickness of the polymer layer formed from the pellet (A-9) was changed to 200 ⁇ m. It was possible to obtain a highly accurate film having a thickness variation of ⁇ 5 ⁇ m.
- Example 19 Polycarbonate (“Upilon S2000” manufactured by Mitsubishi Engineering Plastics Co., Ltd.) is put into an injection molding machine (“UH1000-80” manufactured by Nissei Plastic Co., Ltd.) set to a cylinder temperature of 290 ° C. and a mold temperature of 90 ° C. for a long time. A molded body having a length of 100 mm ⁇ a width of 40 mm and a thickness of 1 mm to be a polymer layer (Y) for insert molding was prepared.
- UH1000-80 manufactured by Mitsubishi Engineering Plastics Co., Ltd.
- the obtained molded body of the layer (Y) was set so as to be in contact with the bottom surface of an injection molding die having a length of 100 mm ⁇ width of 40 mm and a thickness of 2 mm, and the cylinder temperature was set to 180 ° C. and the die temperature was set to 50 ° C.
- the pellet (A-9) was injected into the gap between the molds using the injection molding machine of (1) to prepare a multilayer body having the layer (Z) and the layer (Y) (insert molding).
- the obtained multilayer body was transparent, and the adhesiveness between the two layers was also good.
- Example 20 Insert molding was carried out in the same manner as in Example 19 except that the pellet (A-9) was changed to the pellet (A-12) to produce a multilayer body.
- the obtained multilayer body was transparent, and the adhesiveness between the two layers was also good.
- Examples 21 to 26 A mixture was prepared by previously dry blending the pellet (A-9) obtained in Example 9, the antioxidant, the light stabilizer and the ultraviolet absorber in the proportions shown in Table 5, and the mixture was heated to a cylinder temperature of 180 ° C. The mixture was melt-kneaded with a twin-screw extruder (KRUPP WERNER & PFLEIDER, "ZSK-25") set to. The obtained melt-kneaded product was extruded from a twin-screw extruder, pelletized by a strand cut method, and 300 ppm of Aerosil R972 as an anti-sticking agent was further added to obtain pellets as a raw material for a molded body.
- KRUPP WERNER & PFLEIDER twin-screw extruder
- the color characteristic (b *) in the L * a * b * color system was measured using SD5000 (measurement condition: light source D65, visual field 2 °) manufactured by Nippon Denshoku Industries Co., Ltd. Regarding the appearance of the molded product, when the whole was visually confirmed, when there was no unevenness, it was judged as “clear”, and when there was unevenness, it was judged as "unclear”.
- ADEKA STAB AO-60 pentaerythritol tetrakis [3- (3,5-di-t-butyl-4-hydroxyphenoxy) propionate] manufactured by ADEKA Corporation Phosphorus antioxidant
- ADEKA STAB PEP-36 3,9-bis (2,6-di-t-butyl-4-methylphenoxy) -2,4,8,10-tetraoxa-3,9 manufactured by ADEKA Co., Ltd.
- UV absorber-Biosorb 583 2-phenol, 2- (2H-benzotriazol-2-yl) -4- (1,1,3,3) manufactured by Kyodo Chemical Co., Ltd.
- ADEKA STAB LA-31RG 2,2'-methylenebis [6- (2H-benzotriazol-2-yl) -4- (1,1,3,3-tetramethylbutyl) phenol] manufactured by ADEKA Co., Ltd.
- ADEKA STAB LA-46 manufactured by ADEKA Corporation (2- (4,6-diphenyl-1,3,5-triazin-2-yl) -5- [2- (2-ethylhexanoroxy) ethoxy] phenol
- Examples 27 to 29 >> The pellets (A-9) obtained in Example 9 and, if necessary, non-reactive silicone oil were put into a Labo Plastomill at a ratio shown in Table 5, and these were heated at a temperature of 180 ° C. and a rotation speed of 50 rpm, 5 rpm. After melt-kneading under the condition of 1 minute, the obtained melt-kneaded product was taken out. A sheet-shaped molded body having a length of 3 cm, a width of 6 mm, and a thickness of 3 mm was produced from the obtained melt-kneaded product using a minimax set to a temperature of 200 ° C.
- Example 28 in which a side chain polyether modified type silicone oil (KF351A) which is a non-reactive silicone oil was added as a lubricant, maintained transparency and did not show any bleed-out of the lubricant and had a smooth surface. It was confirmed that the property was also higher than that of Example 27 in which no additive was added.
- KF351A side chain polyether modified type silicone oil
- Lubricant non-reactive silicone oil
- KF351A Shin-Etsu Chemical Co., Ltd.
- side chain polyether modified type ⁇ KF6002: Shin-Etsu Chemical Co., Ltd., both ends hydroxyl group modified type
- Examples 30 and 31 >> The pellets (A-9) and titanium oxide obtained in Example 9 were charged into a Labo Plastomill at a ratio shown in Table 6 and melt-kneaded under the conditions of a temperature of 230 ° C., a rotation speed of 50 rpm, and 5 minutes. Then, a raw material for a molded body in which titanium oxide was uniformly dispersed was obtained. The raw material of the obtained molded body was press-molded under the conditions of a temperature of 200 ° C. and a pressing pressure of 50 kgf / cm 2 to produce a sheet having a thickness of 300 ⁇ m.
- the total light transmittance of the sheet was measured according to ISO 13468-1 with a direct reading hydrometer (manufactured by Nippon Denshoku Industries Co., Ltd.).
- the results are shown in Table 6. In these examples, despite having a thin sheet of 300 ⁇ m, they had a high light shielding rate of 98.5% or more.
- Examples 32 to 36 The pellets (A-12) obtained in Example 12 and the other polymers were kneaded using a Labo Plastomill according to the types of other polymers, the mixing ratios, and the kneading temperatures shown in Table 7 below.
- the obtained mixture was press-molded at a temperature shown in Table 7 using a 1 mm thick spacer.
- Examples 33 to 35 had high compatibility and were “1”.
- the compatibility was slightly high and "2" although there was a slight white turbidity, and the compatibility with the other polymers used in Examples 32 to 36 was slightly high. It was Table 7 shows the results.
- the pellets containing the acrylic triblock copolymer (I) and the acrylic polymer (II) of the present invention have excellent anti-sticking performance and excellent handleability of the pellets.
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Abstract
Description
ペレットの膠着防止をするためには、ペレット表面にエチレンビスステアリン酸アミド等の膠着防止剤を付着させる方法が考えられる。しかし、エチレンビスステアリン酸アミドを膠着防止剤として用いた場合には、得られる成形体の透明性低下や、メヤニが発生する等、問題である。
また膠着防止の別の手段として、アクリル系ブロック共重合体に滑剤を添加する方法が検討されている(例えば、特許文献2)。
[1]メタクリル酸エステル単位を含む少なくとも1個の重合体ブロック(A1)と、アクリル酸エステル単位を含む少なくとも1個の重合体ブロック(B1)とを有するアクリル系ブロック共重合体(I)、及び
メタクリル酸メチル単位を35質量%以上含有し、230℃、荷重3.8kgの条件下におけるメルトフローレート(MFR)が10g/10分以上であるアクリル系重合体(II)を含むペレットであり、
アクリル系ブロック共重合体(I)の重合体ブロック(B1)に含まれるアクリル酸エステル単位が、アクリル酸メチル単位及び一般式CH2=CH-COOR1(1)(式中、R1は炭素数4~12の有機基を表す)で示されるアクリル酸エステル(1)単位のみからなり、
アクリル系ブロック共重合体(I)及びアクリル系重合体(II)の質量比(I)/(II)が90/10~40/60である、ペレット;
[2]膠着防止剤を200~2000ppm含む、[1]に記載のペレット。
[3][1]または[2]に記載のペレットを成形してなる成形体;
を提供することにより達成される。
本発明のペレットに含まれるアクリル系ブロック共重合体(I)は、メタクリル酸エステル単位を含む少なくとも1個の重合体ブロック(A1)と、アクリル酸エステル単位を含む少なくとも1個の重合体ブロック(B1)とを有し、重合体ブロック(B1)に含まれるアクリル酸エステル単位が、アクリル酸メチル単位及び一般式CH2=CH-COOR1(1)(式中、R1は炭素数4~12の有機基を表す)で示されるアクリル酸エステル(1)単位のみからなる。
メタクリル酸フェニル、メタクリル酸ベンジル等のメタクリル酸アルキル以外の、官能基を有さないメタクリル酸エステル;
メタクリル酸メトキシエチル、メタクリル酸エトキシエチル等のメタクリル酸アルコキシアルキルエステル、メタクリル酸ジエチルアミノエチル、メタクリル酸2-ヒドロキシエチル、メタクリル酸2-アミノエチル、メタクリル酸グリシジル、メタクリル酸テトラヒドロフルフリル等の官能基を有するメタクリル酸エステル;等が挙げられる。
(A1-B1)n
(A1-B1)n-A1
A1-(A1-B1)n
(A1-B1)n-Z
(B1-A1)n-Z
(式中、nは1~30の整数、Zはカップリング部位(カップリング剤がポリマー末端と反応して化学結合を形成した後のカップリング部位)を表す)で表されるものであることが好ましい。また、上記nの値は、1~15であることが好ましく、1~8であることがより好ましく、1~4であることがさらに好ましい。)
具体的には、下記一般式:
(A1-B1)m
(A1-B1)n-A1
B1-(A1-B1)m
(A1-B1)m-Z
(B1-A1)m-Z
(式中、nは1~30の整数、mは2~30の整数、Zはカップリング部位(カップリング剤がポリマー末端と反応して化学結合を形成した後のカップリング部位)を表す)で表されるものであることが好ましい。上記mの値は、2~15であることが好ましく、2~8であることがより好ましく、2~4であることがさらに好ましい。また、上記nの値は、1~15であることが好ましく、1~8であることがより好ましく、1~4であることがさらに好ましい。)
重合体ブロック(A1)の含有量が5質量%未満であると、アクリル系ブロック共重合体(I)の流動性が高く液状となりやすい傾向や、アクリル系ブロック共重合体(I)及び後述するアクリル系重合体(II)からペレットを製造する際、例えばアンダーウォーターカッター等でカットしてもペレット形状を維持することができない傾向にある。重合体ブロック(A1)の含有量が40質量%を超えると、柔軟性が損なわれる傾向にある。
アクリル系ブロック共重合体(I)における重合体ブロック(A1)の含有量は、柔軟性に優れるペレットを得る観点からは、8~35質量%であることが好ましく、14~31質量%であることがより好ましい。
本発明のペレットに含まれるアクリル系重合体(II)は、アクリル系ブロック共重合体(I)とは異なる重合体であり、メタクリル酸メチル単位を35質量%以上含有し、230℃、荷重3.8kgの条件下におけるメルトフローレート(MFR)が10g/10分以上である重合体である。メタクリル酸メチル単位の含有量、及びMFRの両方の条件を満たすアクリル系重合体(II)とアクリル系ブロック共重合体(I)とを組み合わせることで、十分に膠着防止されたペレットが製造できる。また、得られたペレットから製造された成形体は、アクリル系ブロック共重合体(I)に由来する優れた特性が損なわれることがない。
本発明のペレットに含まれ得るアクリル系ブロック共重合体(II-1)は、メタクリル酸メチル単位を含む重合体ブロックを有し、共重合体中のメタクリル酸メチル単位の含有量が35質量%以上であるアクリル系ブロック共重合体である。
(A2-B2)i
(A2-B2)i-A2
A2-(A2-B2)i
(A2-B2)i-Z
(B2-A2)i-Z
(式中、iは1~30の整数、Zはカップリング部位(カップリング剤がポリマー末端と反応して化学結合を形成した後のカップリング部位)を表す)で表されるものであることが好ましい。また、上記iの値は、1~15であることが好ましく、1~8であることがより好ましく、1~4であることがさらに好ましい。)
具体的には、下記一般式:
(A2-B2)k
(A2-B2)i-A2
B2-(A2-B2)k
(A2-B2)k-Z
(B2-A2)k-Z
(式中、iは1~30の整数、kは2~30の整数、Zはカップリング部位(カップリング剤がポリマー末端と反応して化学結合を形成した後のカップリング部位)を表す)で表されるものであることが好ましい。上記kの値は、2~15であることが好ましく、2~8であることがより好ましく、2~4であることがさらに好ましい。また、上記iの値は、1~15であることが好ましく、1~8であることがより好ましく、1~4であることがさらに好ましい。)
アクリル系ブロック共重合体(II-1A)におけるメタクリル酸メチル単位の含有量は、柔軟性に優れるペレットを得る観点からは、35~57質量%であることが好ましく、37~54質量%であることがより好ましい。
AlR3R4R5 (3)
(式(3)中、R3、R4及びR5はそれぞれ独立して置換基を有してもよいアルキル基、置換基を有していてもよいシクロアルキル基、置換基を有してもよいアリール基、置換基を有していてもよいアラルキル基、置換基を有してもよいアルコキシ基、置換基を有してもよいアリールオキシ基又はN,N-二置換アミノ基を表すか、或いはR3が上記したいずれかの基であり、R4及びR5が一緒になって置換基を有していてもよいアリーレンジオキシ基を形成している。)で表される有機アルミニウム化合物の存在下に、必要に応じて、反応系内に、ジメチルエーテル、ジメトキシエタン、ジエトキシエタン、12-クラウン-4等のエーテル化合物;トリエチルアミン、N,N,N',N'-テトラメチルエチレンジアミン、N,N,N',N",N"-ペンタメチルジエチレントリアミン、1,1,4,7,10,10-ヘキサメチルトリエチレンテトラミン、ピリジン、2,2'-ジピリジル等の含窒素化合物をさらに添加して、(メタ)アクリル酸エステルを重合させる方法が採用できる。
本発明のペレットに含まれ得るアクリル系ランダム共重合体又はメタクリル酸メチル単独重合体(II-2)は、メタクリル酸メチル単位を35質量%以上含む、アクリル系ランダム共重合体(II-2A)又はメタクリル酸メチル単独重合体(II-2B)である。
これら他の単量体の中でも、メタクリル酸エステル(メタクリル酸メチルを除く)、アクリル酸エステル、メタクリル酸が好ましい。また、膠着防止性能がより優れる点及び入手容易性の観点からは、アクリル酸メチルがより好ましい。
本発明の成形体は、上記ペレットを原料とし、種々の成形方法で製造された成形体である。
酸化防止剤としては、フェノール系酸化防止剤、リン系酸化防止剤等が挙げられる。紫外線吸収剤としては、ベンゾトリアゾール系紫外線吸収剤等が挙げられる。光安定剤としては、ヒンダードアミン系光安定剤等が挙げられる。
これらは成形体に1種単独で含まれていてもよいし、2種以上含まれていてもよい。中でも、酸化防止剤、紫外線吸収剤、光安定剤のすべてが成形体に含まれていることが好ましい一態様である。
成形体中の剤の各々の添加量は、ペレット100質量部に対して、好ましくは0.01~1.0質量部、より好ましくは、0.03~0.60質量部である。
滑剤は成形体に1種単独で含まれていてもよく、2種以上含まれていてもよい。成形体中の滑剤の添加量は、ペレット100質量部に対して、好ましくは0.01~1質量部、より好ましくは、0.03~0.30質量部である。
無機繊維、有機繊維が含まれていると、得られる成形体に耐久性が付与される。無機充填剤が含まれていると、得られる成形体に耐熱性、耐候性が付与される。
また、酸化チタンが含まれていると、得られる成形体に光遮蔽性が付与されやすい。成形体中の酸化チタンの添加量は、ペレット100質量部に対して、好ましくは20~250質量部、より好ましくは、30~150質量部である。
成形体の形状としては、例えば、ペレット、シート、プレート、パイプ、チューブ、ベルト、ホース、棒状体、粒状体等、種々の形状が挙げられる。
アクリル系ブロック共重合体の重量平均分子量及び数平均分子量は、ゲル・パーミエイション・クロマトグラフィー(以下GPCと略記する)によりポリスチレン換算分子量で求め、分子量分布はこれらの値から算出した。分子量の測定条件の詳細は以下のとおりである。
・装置:東ソー株式会社製GPC装置「HLC-8020」
・分離カラム:東ソー株式会社製の「TSKgel GMHXL」、「G4000HXL
」及び「G5000HXL」を直列に連結
・溶離剤:テトラヒドロフラン
・溶離剤流量:1.0ml/分
・カラム温度:40℃
・検出方法:示差屈折率(RI)
1H-NMR測定によって求めた。
・装置:日本電子株式会社製核磁気共鳴装置「JNM-LA400」
・重溶媒:重水素化クロロホルム
1H-NMRスペクトルにおいて、3.6ppm、3.7ppm及び4.0ppm付近のシグナルは、それぞれ、メタクリル酸メチル単位のエステル基に含まれる酸素原子に隣接する炭素原子に結合した水素原子(-O-CH 3)、アクリル酸メチル単位のエステル基に含まれる酸素原子に隣接する炭素原子に結合した水素原子(-O-CH 3)及びアクリル酸n-ブチル単位のエステル基に含まれる酸素原子に隣接する炭素原子に結合した水素原子(-O-CH 2-CH2-CH2-CH3)に帰属され、これらの積分値の比から各モノマー単位のモル比を求め、これをモノマー単位の分子量をもとに質量比に換算することによって各重合体ブロックの含有量を求めた。
実施例及び比較例で得られた重合体のメルトフローレート(MFR)は、ISO 1133に準拠して230℃、荷重3.8kg、10分の条件で測定した。
実施例及び比較例で得られたペレットを100mlのプラスチック製ビーカーに移し、単位面積あたりの荷重が103g/cm2になるように重りを載せ、40℃の乾燥機に1週間仕込み、プラスチック製ビーカーからペレットを取り出す際の膠着状態を目視で観察した。
AA:ペレットは完全に解れている
A:ペレットは一部塊状であるが、指で触れると簡単に崩れる
B:ペレットは一部塊状であり、指で触れても簡単に崩れない
実施例、比較例で得られたペレットを目視で観察した。
a:白濁感はなく、透明性が高い
b:やや白濁感がある
参考例で作製したプレスシートを目視で観察した。
1:白濁感はなく、透明性が高く、相容性が高い
2:やや白濁感があるが、相容性はやや高い。
3:白濁感が強く、相容性が悪い。
(1)2Lの三口フラスコに三方コックを付け内部を窒素で置換した後、室温で撹拌しながら、トルエン938gと1,2-ジメトキシエタン20.2gを加え、続いて、イソブチルビス(2,6-ジ-t-ブチル-4-メチルフェノキシ)アルミニウム20.8mmolを含有するトルエン溶液41.4gを加え、さらにsec-ブチルリチウム2.60mmolを含有するsec-ブチルリチウムのシクロヘキサン溶液1.53gを加えた。
(2)続いて、これにメタクリル酸メチル21.8gを撹拌下室温で加えさらに60分間撹拌を続けた。反応液は当初、黄色に着色していたが、60分間撹拌後には無色となった。
(3)その後、重合液の内部温度を-30℃に冷却し、撹拌下アクリル酸メチルとアクリル酸n-ブチルの混合液(質量比50/50)246gを2時間かけて滴下し、滴下終了後-30℃でさらに5分間撹拌を続けた。
(4)その後、これにメタクリル酸メチル25.2gを加え、一晩室温にて撹拌した。
(5)メタノール12.2gを添加して重合反応を停止した後、得られた反応液を撹拌下15kgのメタノール中に注ぎ、白色沈殿物を析出させた。得られた白色沈殿物を回収し、乾燥させることにより、アクリル系トリブロック共重合体(I-1)260gを得た。得られたアクリル系トリブロック共重合体(I-1)の重量平均分子量(Mw)及び数平均分子量(Mn)を上述の方法でGPC測定により求め、分子量分布(Mw/Mn)を算出した。また、上述した1H-NMR測定により、アクリル系トリブロック共重合体(I-1)中のメタクリル酸メチル単位からなる重合体ブロックの合計含有量を求めた。アクリル系トリブロック共重合体(I-1)の性状を表1に示す。
(1)2Lの三口フラスコに三方コックを付け内部を窒素で置換した後、室温で撹拌しながら、トルエン938gと1,2-ジメトキシエタン20.2gを加え、続いて、イソブチルビス(2,6-ジ-t-ブチル-4-メチルフェノキシ)アルミニウム20.8mmolを含有するトルエン溶液41.4gを加え、さらにsec-ブチルリチウム2.60mmolを含有するsec-ブチルリチウムのシクロヘキサン溶液1.53gを加えた。(2)続いて、これにメタクリル酸メチル21.8gを撹拌下室温で加えさらに60分間撹拌を続けた。反応液は当初、黄色に着色していたが、60分間撹拌後には無色となった。
(3)その後、重合液の内部温度を-30℃に冷却し、撹拌下アクリル酸メチルとアクリル酸n-ブチルの混合液(質量比75/25)246gを2時間かけて滴下し、滴下終了後-30℃でさらに5分間撹拌を続けた。
(4)その後、これにメタクリル酸メチル25.2gを加え、一晩室温にて撹拌した。
(5)メタノール12.2gを添加して重合反応を停止した後、得られた反応液を撹拌下15kgのメタノール中に注ぎ、白色沈殿物を析出させた。得られた白色沈殿物を回収し、乾燥させることにより、アクリル系トリブロック共重合体(I-2)260gを得た。得られたアクリル系トリブロック共重合体(I-2)の重量平均分子量(Mw)及び数平均分子量(Mn)を上述の方法でGPC測定により求め、分子量分布(Mw/Mn)を算出した。また、上述した1H-NMR測定により、アクリル系トリブロック共重合体(I-2)中のメタクリル酸メチル単位からなる重合体ブロックの合計含有量を求めた。アクリル系トリブロック共重合体(I-2)の性状を表1に示す。
(1)2Lの三口フラスコに三方コックを付け内部を窒素で置換した後、室温で撹拌しながら、トルエン936gと1,2-ジメトキシエタン51.4gを加え、続いて、イソブチルビス(2,6-ジ-t-ブチル-4-メチルフェノキシ)アルミニウム16.5mmolを含有するトルエン溶液32.9gを加え、さらにsec-ブチルリチウム7.00mmolを含有するsec-ブチルリチウムのシクロヘキサン溶液4.10gを加えた。
(2)続いて、これにメタクリル酸メチル65.0gを撹拌下、室温で加え、さらに60分間撹拌をつづけた。反応液は当初、黄色に着色していたが、60分間撹拌後には無色となった。
(3)その後、重合液の内部温度を-30℃に冷却し、撹拌下アクリル酸n-ブチル226gを2時間かけて滴下し、滴下終了後-30℃でさらに5分間撹拌を続けた。
(4)その後、これにメタクリル酸メチル161gを加え、一晩室温にて撹拌した。
(5)メタノール13.7gを添加して重合反応を停止した後、得られた反応液を攪拌下15kgのメタノール中に注ぎ、白色沈殿物を析出させた。得られた白色沈殿物を回収し、乾燥させることにより、アクリル系トリブロック共重合体(II-1A-1)430gを得た。得られたアクリル系トリブロック共重合体(II-1A-1)の重量平均分子量(Mw)及び数平均分子量(Mn)を上述の方法でGPC測定により求め、分子量分布(Mw/Mn)を算出した。また、上述した1H-NMR測定により、アクリル系トリブロック共重合体(II-1A-1)中のメタクリル酸メチル単位からなる重合体ブロックの合計含有量を求めた。アクリル系トリブロック共重合体(II-1A-1)の性状を表2に示す。
(1)2Lの三口フラスコに三方コックを付け内部を窒素で置換した後、室温で撹拌しながら、トルエン1029gと1,2-ジメトキシエタン51.4gを加え、続いて、イソブチルビス(2,6-ジ-t-ブチル-4-メチルフェノキシ)アルミニウム16.5mmolを含有するトルエン溶液32.9gを加え、さらにsec-ブチルリチウム7.70mmolを含有するsec-ブチルリチウムのシクロヘキサン溶液4.51gを加えた。
(2)続いて、これにメタクリル酸メチル50.0gを撹拌下、室温で加え、さらに60分間撹拌をつづけた。反応液は当初、黄色に着色していたが、60分間撹拌後には無色となった。
(3)その後、重合液の内部温度を-30℃に冷却し、撹拌下アクリル酸n-ブチル209gを2時間かけて滴下し、滴下終了後-30℃でさらに5分間撹拌を続けた。
(4)その後、これにメタクリル酸メチル82.0gを加え、一晩室温にて撹拌した。
(5)メタノール13.7gを添加して重合反応を停止した後、得られた反応液を撹拌下15kgのメタノール中に注ぎ、白色沈殿物を析出させた。得られた白色沈殿物を回収し、乾燥させることにより、アクリル系トリブロック共重合体(II-1A-2)330gを得た。得られたアクリル系トリブロック共重合体(II-1A-2)の重量平均分子量(Mw)及び数平均分子量(Mn)を上述の方法でGPC測定により求め、分子量分布(Mw/Mn)を算出した。また、上述した1H-NMR測定により、アクリル系トリブロック共重合体(II-1A-2)中のメタクリル酸メチル単位からなる重合体ブロックの合計含有量を求めた。アクリル系トリブロック共重合体(II-1A-2)の性状を表2に示す。
(1)2Lの三口フラスコに三方コックを付け内部を窒素で置換した後、室温で撹拌しながら、トルエン936gと1,2-ジメトキシエタン51.4gを加え、続いて、イソブチルビス(2,6-ジ-t-ブチル-4-メチルフェノキシ)アルミニウム16.5mmolを含有するトルエン溶液32.9gを加え、さらにsec-ブチルリチウム6.62mmolを含有するsec-ブチルリチウムのシクロヘキサン溶液3.88gを加えた。
(2)続いて、これにメタクリル酸メチル52.9gを撹拌下、室温で加え、さらに60分間撹拌をつづけた。反応液は当初、黄色に着色していたが、60分間撹拌後には無色となった。
(3)その後、重合液の内部温度を-30℃に冷却し、撹拌下アクリル酸n-ブチル226gを2時間かけて滴下し、滴下終了後-30℃でさらに5分間撹拌を続けた。
(4)その後、これにメタクリル酸メチル46.2gを加え、一晩室温にて撹拌した。
(5)メタノール13.7gを添加して重合反応を停止した後、得られた反応液を撹拌下15kgのメタノール中に注ぎ、白色沈殿物を析出させた。得られた白色沈殿物を回収し、乾燥させることにより、アクリル系トリブロック共重合体(III-1)300gを得た。得られたアクリル系トリブロック共重合体(III-1)の重量平均分子量(Mw)及び数平均分子量(Mn)を上述の方法でGPC測定により求め、分子量分布(Mw/Mn)を算出した。また、上述した1H-NMR測定により、アクリル系トリブロック共重合体(III-1)中のメタクリル酸メチル単位からなる重合体ブロックの合計含有量を求めた。アクリル系トリブロック共重合体(III-1)の性状を表2に示す。
アクリル樹脂(メタクリル酸メチル単位含有量:90質量%、重量平均分子量:85,000)を、衝撃式粉砕機(ホソカワミクロン株式会社製、ACMパルベライザー-10)によって一次粉砕、カウンタージェットミル(ホソカワミクロン株式会社製、200AFG)によって二次粉砕することで、粒子径分布のD50値=6μmのアクリル樹脂微粒子を製造した。
得られたアクリル系トリブロック共重合体(I-1)又は(I-2)とアクリル系トリブロック共重合体(II-1A-1)又は(II-1A-2)を表3に記載の割合で事前にドライブレンドした混合物を作製し、この混合物を二軸押出機(株式会社日本製鋼所製「JSW-JBaII」)にて溶融混練した。得られた溶融混練物を二軸押出機から押し出し、アンダーウォーターカット方式によりペレット化し、ペレット(A'-1、2、6~12)を得た。その後、アエロジルR972をペレット(A'-1、2、6~12)の質量に対して表3に記載の濃度になるように、打粉し、ペレット(A-1、2、6~12)を得た。得られたペレットの透明性は「a」と良好であった。また、耐膠着性については、「A」もしくは「AA」であり膠着しにくく良好であり、得られたペレットは取り扱い性に優れていることがわかった。結果を表3に示す。
得られたアクリル系トリブロック共重合体(I-1)とアクリル系トリブロック共重合体(II-1A-1)を表3に記載の割合で事前にドライブレンドした混合物を作製し、この混合物を二軸押出機(KRUPP WERNER & PFLEIDERER社製「ZSK-25」)にて溶融混練した。得られた溶融混練物を二軸押出機から押し出し、ストランドカット方式によりペレット化し、ペレット(A'-3~5)を得た。その後、アエロジルR972をペレット(A'-3~5)の質量に対して表3に記載の濃度になるように、打粉し、ペレット(A-3~5)を得た。得られたペレットの透明性は「a」と良好であった。また、耐膠着性については、「AA」であり膠着しにくく良好であり、得られたペレットは取り扱い性に優れていることがわかった。結果を表3に示す。
得られたアクリル系トリブロック共重合体(I-1)と、温度230℃、荷重3.8kgの条件下におけるMFRが15g/10分であり、メタクリル酸メチル単位の含有量が80質量%以上であるアクリル系ランダム共重合体(II-2A-1)(株式会社クラレ製「パラペット(登録商標) GF」)を表3に記載の割合で事前にドライブレンドした混合物を作製し、この混合物を、二軸押出機(株式会社日本製鋼所製「JSW-JBaII」)にて溶融混練した。得られた溶融混練物を二軸押出機から押し出し、アンダーウォーターカット方式によりペレット化し、ペレット(A'-13~15)を得た。その後、アエロジルR972をペレット(A'-13~15)の質量に対して表3に記載の濃度になるように、打粉し、ペレット(A-13~15)を得た。得られたペレットの透明性は、やや白濁感があり「b」であったが、耐膠着性については、「A」もしくは「AA」であり膠着しにくく良好であり、得られたペレットは取り扱い性に優れていることがわかった。結果を表3に示す。
膠着防止剤をアエロジルR972から、製造例6で得られたアクリル樹脂微粒子に変更した以外は、実施例12と同様にして、表3に記載の濃度になるように、打粉し、ペレット(A-27)を得た。得られたペレットの透明性は「a」と良好であった。また、耐膠着性については、「AA」であり膠着しにくく良好であり、得られたペレットは取り扱い性に優れていることがわかった。結果を表3に示す。
得られたアクリル系トリブロック共重合体(I-1)又は(I-2)を二軸押出機(KRUPP WERNER & PFLEIDERER社製「ZSK-25」)にて溶融混練した。得られた溶融混練物を二軸押出機から押し出し、ストランドカット方式によりペレット化し、ペレット(A'-16、18、20~22)を得た。その後、表3に記載の膠着防止剤を、所定の濃度になるように、打粉し、(A-16、18、20~22)を得た。得られたペレットの透明性は、膠着防止剤の添加量が多く、やや白濁感があり「b」であった。また、耐膠着性についても、「B」であり膠着しやすく、得られたペレットは取り扱い性に劣ることがわかった。結果を表3に示す。
得られたアクリル系トリブロック共重合体(I-1)を二軸押出機(株式会社日本製鋼所製「JSW-JBaII」)にて溶融混練した。得られた溶融混練物を二軸押出機から押し出し、アンダーウォーターカット方式によりペレット化し、ペレット(A'-17、19)を得た。その後、表3に記載の膠着防止剤を、所定の濃度になるように、打粉し、(A-17、19)を得た。得られたペレットの透明性は、膠着防止剤の添加量が多く、やや白濁感があり「b」であった。また、耐膠着性についても、「B」であり膠着しやすく、得られたペレットは取り扱い性に劣ることがわかった。結果を表3に示す。
得られたアクリル系トリブロック共重合体(I-1)と、温度230℃、荷重3.8kgの条件下におけるMFRが8.0g/10分であり、メタクリル酸メチル単位の含有量が80質量%以上であるアクリル系ランダム共重合体(III-2)(株式会社クラレ製「パラペット(登録商標) G」)を表3に記載の割合で事前にドライブレンドした混合物を作製し、この混合物を二軸押出機(株式会社日本製鋼所製「JSW-JBaII」)にて溶融混練した。得られた溶融混練物を二軸押出機から押し出し、アンダーウォーターカット方式によりペレット化し、ペレット(A'-23~25)を得た。その後、アエロジルR972をペレット(A'-23~25)の質量に対して表3に記載の濃度になるように、打粉し、ペレット(A-23~25)を得た。得られたペレットの透明性は、やや白濁感があり「b」であった。また、耐膠着性についても、「B」であり膠着しやすく、得られたペレットは取り扱い性に劣ることがわかった。結果を表3に示す。
得られたアクリル系トリブロック共重合体(I-1)とアクリル系トリブロック共重合体(III-1)を表3に記載の割合で事前にドライブレンドした混合物を作製し、この混合物を二軸押出機(株式会社日本製鋼所製「JSW-JBaII」)にて溶融混練した。得られた溶融混練物を二軸押出機から押し出し、アンダーウォーターカット方式によりペレット化し、ペレット(A'-26)を得た。その後、アエロジルR972をペレット(A'-26)の質量に対して表3に記載の濃度になるように、打粉し、ペレット(A-26)を得た。得られたペレットの透明性は、膠着防止剤の添加量が多く、やや白濁感があり「b」であった。また、耐膠着性についても、「B」であり膠着しやすく、得られたペレットは取り扱い性に劣ることがわかった。結果を表3に示す。
実施例9で得られたペレット(A-9)をホッパーから単軸押出機に投入し、180℃の温度条件下で加熱溶融し、単軸押出機の先端に配置されたTダイから、PETフィルム(厚み250μm、東洋紡株式会社製「E5001」)上に、幅300mm、厚み100μmのペレット(A-9)から形成された重合体層をラミネートし(Tダイ法)、さらにシリコン離形処理PET(厚み50μm、帝人ソリューション株式会社製「A31」)により、離形処理面が前記重合体層表面と接するようにカバーして、積層フィルムを作製した。引き取り速度は2.0m/minとした。用いたペレット(A-9)は耐膠着性に優れていることから、ブロッキングが発生することなく、安定した速度で単軸押出機に供給できたため、厚み斑も±5μmと小さく、精度の高い積層フィルムを得ることができた。得られたフィルムは、透明性も高く、耐膠着性にも優れた柔軟性の高いフィルムであった。
ペレット(A-9)から形成された重合体層の厚みを200μmに変更する以外は、実施例17と同様の手法により、積層フィルムを作製した。フィルムの厚み斑が±5μmと精度の高いフィルムを得ることができた。
ポリカーボネート(三菱エンジニアリングプラスチックス株式会社製「ユーピロンS2000」)を、シリンダー温度290℃及び金型温度90℃に設定した射出成形機(日精樹脂工業株式会社製「UH1000-80」)に投入し、長さ100mm×幅40mm、厚み1mmのインサート成形用の重合体層(Y)となる成形体を作製した。次いで、得られた層(Y)の成形体を長さ100mm×幅40mm、厚み2mmの射出成形金型の底面に接するようにセットし、シリンダー温度180℃及び金型温度50℃に設定した前述の射出成形機を用いて、ペレット(A-9)を金型の隙間に射出して、層(Z)と層(Y)を有する複層体を作製した(インサート成形)。得られた複層体は透明であり、2層間の接着性も良好であった。
ペレット(A-9)をペレット(A-12)に変更した以外は、実施例19と同様にして、インサート成形を行い、複層体を作製した。得られた複層体は透明であり、2層間の接着性も良好であった。
実施例9で得られたペレット(A-9)、酸化防止剤、光安定剤及び紫外線吸収剤を表5に記載の割合で事前にドライブレンドした混合物を作製し、この混合物をシリンダー温度180℃に設定した二軸押出機(KRUPP WERNER & PFLEIDERER社製「ZSK-25」)にて溶融混練した。得られた溶融混練物を二軸押出機から押し出し、ストランドカット方式によりペレット化し、更に膠着防止剤としてアエロジルR972を300ppm添加することで、成形体の原料となるペレットを得た。その後、シリンダー温度180℃及び金型温度50℃に設定した射出成形機(住友重機械工業株式会社製「SE18DU」)により、得られたペレットから長さ5cm×幅5cm、厚み3mmのシート状成形体を作製した。直読へイズメーター(日本電色工業株式会社製)により、ISO 14782に準拠してその成形体のヘイズ値を、ISO 13468-1に準拠してその成形体の全光線透過率を測定した。また、L*a*b*表色系における色特性(b*)を、日本電色工業株式会社製SD5000(測定条件:光源 D65,視野 2°)を用い、測定した。成形体の外観は、全体を目視で確認した際に、ムラがない場合を「クリア」と判断し、ムラがある場合を「アンクリア」と判断した。
その後、QUV促進耐候試験機(Q-LAB社製;光源:UV-340、0.60W/m2)を用いて、得られたシート状成形体の促進耐候試験(試験条件:1サイクルは、UV照射(60℃、8時間)及び水噴霧(50℃、4時間)の合計12時間とし、これを14サイクル計168時間)を行った。また促進耐候試験後のシート状成形体についても、前述した測定条件に従って、ヘイズ値、全光線透過率、色特性(b*)、及び外観の評価を行った。結果を表4に示す。なお、表4において、ヘイズ値、全光線透過率、及び色特性(b*)の各カラムの2つの値は、左側が促進耐候試験前の値、右側が促進耐候試験後の値である。
表4に示すように、特に、実施例22~25の酸化防止剤、光安定剤、紫外線吸収剤などを添加した場合、促進試験前後の色特性の変化をより小さくできることがわかった。
<添加剤>
フェノール系酸化防止剤
・アデカスタブAO-60:株式会社ADEKA製
ペンタエリスリトールテトラキス[3-(3,5-ジ-t-ブチル-4-ヒドロキシフェノキシ)プロピオネート]
リン系酸化防止剤
・アデカスタブPEP-36:株式会社ADEKA製
3,9-ビス(2,6-ジ-t-ブチル-4-メチルフェノキシ)-2,4,8,10-テトラオクサ-3,9-ジホスファスピロ[5.5]ウンデカン
光安定剤
・Tinuvin144:BASF社製
ビス(1,2,2,6,6-ペンタメチル-4-ピペリジニル)-[[3,5-ビス(1,1-ジメチルエチル)-4-ヒドロキシフェニル]メチル]ブチルマロネート
紫外線吸収剤
・Viosorb583:共同薬品株式会社製
2-フェノール,2-(2H-ベンゾトリアゾール-2-イル)-4-(1,1,3,3-テトラメチルブチル)
・アデカスタブLA-31RG:株式会社ADEKA製
2,2’-メチレンビス[6-(2H‐ベンゾトリアゾール-2-イル)-4-(1,1,3,3-テトラメチルブチル)フェノール]
・アデカスタブLA-46:株式会社ADEKA製
(2-(4,6-ジフェニル-1,3,5‐トリアジン-2-イル)-5-[2-(2-エチルヘキサノルオキシ)エトキシ]フェノール
実施例9で得られたペレット(A-9)及び必要に応じて非反応性シリコーンオイルを表5に記載の割合でラボプラストミルに投入して、これらを温度180℃、回転数50rpm、5分間の条件で溶融混練した後、得られた溶融混練物を取り出した。温度200℃に設定したミニマックスを用いて、得られた溶融混練物から長さ3cm×幅6mm、厚み3mmのシート状成形体を作製した。直読へイズメーター(日本電色工業株式会社製)により、ISO 14782に準拠してその成形体のヘイズ値を、ISO 13468-1に準拠してその成形体の全光線透過率を測定した。また、成形体作製一週間後、その成形体に含まれる成分のブリードの有無を、その外観を目視することにより確認した。表面の滑性を、得られた成形体の表面を指で触った際の感触で判断した。結果を表5に示す。
滑剤として、非反応性シリコーンオイルである側鎖ポリエーテル変性タイプのシリコーンオイル(KF351A)を添加した実施例28は、透明性を維持しつつ、滑剤のブリードアウトも見られず、かつ表面の滑性も無添加の実施例27よりも高いことを確認した。
<添加剤>
滑剤(非反応性シリコーンオイル)
・KF351A:信越化学工業株式会社製、側鎖ポリエーテル変性タイプ
・KF6002:信越化学工業株式会社製、両末端水酸基変性タイプ
実施例9で得られたペレット(A-9)及び酸化チタンを、表6に記載の割合でラボプラストミルに投入して、これらを温度230℃、回転数50rpm、5分間の条件で溶融混練し、酸化チタンが均一に分散した成形体の原料を得た。得られた成形体の原料を、温度200℃、プレス圧50kgf/cm2の条件でプレス成形して、300μm厚のシートを作製した。直読へイズメーター(日本電色工業株式会社製)により、ISO 13468-1に準拠してそのシートの全光線透過率を測定した。光遮蔽率を(光遮蔽率)=1-(全光線透過率)に従って算出した。結果を表6に示す。
これら実施例では、300μmの薄いシートにも関わらず、98.5%以上の高い光遮蔽率を有した。
<添加剤>
フィラー
・酸化チタン:石原産業株式会社製、CR90
下記表7に記載の他の重合体の種類、混合割合、及び混練温度に従って、実施例12で得られたペレット(A-12)及び他の重合体を、ラボプラストミルを用いて混練した。得られた混合物を1mm厚のスペーサーを用いて、表7に記載の温度にてプレス成形した。得られたプレスシートを目視観察にて相容性を評価したところ、実施例33~35は、相容性が高く「1」であった。また、実施例32、36においても、やや白濁感はあるものの相容性はやや高く「2」であり、本実施例32~36で用いた他の重合体との相容性は、やや高かった。結果を表7に示す。
・ポリカーボーネート:三菱エンジニアリングプラスチックス株式会社製、ユーピロンS-3000
・アクリル系樹脂:株式会社クラレ製、パラペット(登録商標)GF
・スチレン系熱可塑性エラストマー:株式会社クラレ製、セプトン(登録商標)2004
・スチレン系熱可塑性エラストマー:株式会社クラレ製、ハイブラー(登録商標)7311
・PET-G:Eastman社製、Eastar GN007
Claims (3)
- メタクリル酸エステル単位を含む少なくとも1個の重合体ブロック(A1)と、アクリル酸エステル単位を含む少なくとも1個の重合体ブロック(B1)とを有するアクリル系ブロック共重合体(I)、及び
メタクリル酸メチル単位を35質量%以上含有し、230℃、荷重3.8kgの条件下におけるメルトフローレート(MFR)が10g/10分以上であるアクリル系重合体(II)を含むペレットであり、
アクリル系ブロック共重合体(I)の重合体ブロック(B1)に含まれるアクリル酸エステル単位が、アクリル酸メチル単位及び一般式CH2=CH-COOR1(1)(式中、R1は炭素数4~12の有機基を表す)で示されるアクリル酸エステル(1)単位のみからなり、
アクリル系ブロック共重合体(I)及びアクリル系重合体(II)の質量比(I)/(II)が90/10~40/60である、ペレット。 - 膠着防止剤を200~2000ppm含む、請求項1に記載のペレット。
- 請求項1または2に記載のペレットを成形してなる成形体。
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