WO2017130608A1 - マスターバッチ、樹脂成形材料、成形体及びこれらの製造方法、マスターバッチの評価方法 - Google Patents
マスターバッチ、樹脂成形材料、成形体及びこれらの製造方法、マスターバッチの評価方法 Download PDFInfo
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- WO2017130608A1 WO2017130608A1 PCT/JP2016/087922 JP2016087922W WO2017130608A1 WO 2017130608 A1 WO2017130608 A1 WO 2017130608A1 JP 2016087922 W JP2016087922 W JP 2016087922W WO 2017130608 A1 WO2017130608 A1 WO 2017130608A1
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- B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
- B29K2995/002—Coloured
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/10—Homopolymers or copolymers of propene
- C08J2423/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/006—Additives being defined by their surface area
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2310/00—Masterbatches
Definitions
- the present invention relates to a master batch, a resin molding material, a molded body, a manufacturing method thereof, and a master batch evaluation method.
- a master batch in which a pigment is dispersed in a resin in advance and a resin that is a material of the resin molded body to be colored are mixed and then processed.
- Such a masterbatch is manufactured by kneading the pigment to be colored and the same kind or different kind of resin as the material of the resin molded body together with various additives added as necessary.
- Patent Document 1 discloses a resin composition using a polyolefin resin, a carbon nanotube, and a specific wax. More specifically, it is disclosed that a specific wax is dispersed in a polyolefin resin in a state where the surface of the carbon nanotube is coated, thereby obtaining a jet black tone having a bluish color and a high blackness. .
- the present inventor has obtained the knowledge that satisfying a specific condition in the master batch is effective as a design guideline for solving the above problems. That is, the present inventor, as a cause of different colors, impressions, aesthetics, etc. felt by the user, L * of the light received by the change in the position of the light source when the fixed resin molding is irradiated with light . It was noted that the a * value and b * value in the a * b * color system are different. Then, a new design guideline is set for fluctuations in the a * value and b * value under specific conditions, and the user can hold the resin molded product at any angle by satisfying a certain condition for the a * value and the b * value. As a result, it became difficult to perceive differences in color, impression, aesthetics, etc., and as a result, it was found for the first time that a uniform jet black at a high level could be obtained, and the present invention was completed.
- the present invention provides a master batch that includes a black pigment and a thermoplastic resin for a master batch and satisfies the following conditions.
- (conditions) 100 parts by weight of polypropylene having a melt flow rate of 30 g / 10 min (JIS K7210: 1999) and a density of 0.9 g / cm 3 (JIS K7112: 1999) is kneaded with 3 parts by weight of the master batch, and the particle size # 800 (JIS) R 6001: 1998)
- a resin plate was prepared by injection molding.
- the a * value and b * value in the L * a * b * color system on the surface of the resin plate satisfy the following expressions (1) to (4).
- D [(a * value 20 ⁇ a * value 45 ) 2 + (b * value 20 ⁇ b * value 45 ) 2 ] 1/2 + [(a * value 45 ⁇ a * value 75 ) 2 + (b * The value 45 -b * value 75) 2] 1/2 + [(a * value 75 -a * value 110) 2 + (b * value 75 -b * value 110) 2] 1/2 (1) D ⁇ 4.3 (2) ⁇ a * ⁇ 2.5 (3) ⁇ b * ⁇ 3.6 (4) (In the formula, a * value 20 , a * value 45 , a * value 75 , a * value 110 , b * value 20 , b * value 45 , b * value 75 , and b * value 110 are equal to each other in multi-directional illumination.
- each a * value when the perpendicular is 45 °
- the light receiving part is 90 °
- the light source is 20 °, 45 °, 75 °, and 110 °
- b * Indicates value is 20 °, 45 °, 75 °, and 110 °
- a master batch, a molding material, and a molded body capable of obtaining a uniform jet black at a high level are provided.
- JIS is an industrial standard established by the competent minister in response to a report from the Japan Industrial Standards Committee based on the Industrial Standardization Act, and is one of Japan's national standards.
- # 800 indicates a predetermined particle distribution of fine powder.
- FIG. 1 is a diagram schematically showing a multi-angle illumination multi-directional colorimeter according to this embodiment.
- the multi-angle colorimeter 100 includes light sources 210, 220, 230, and 240 and a light receiving unit 300, and multi-directional illumination that irradiates an object from four different directions and receives light in one direction.
- a one-way light receiving system is used.
- n perpendicular line
- the light receiving portion is 90 °
- the light source 210 is 20 °
- the light source 220 is 45 °
- the light source 230 is 75 °
- the light source 240 is 110 °.
- each of the light sources 210, 220, 230, and 240 in order toward the resin plate P is reflected by the surface of the resin plate P, and the reflected light is parallel to a normal angle of 45 °.
- the light is received by the light receiving unit 300, and the color in the L * a * b * color system is determined (when the normal is 45 °, the position of the light receiving unit 300 is 90 °).
- CE-741GL manufactured by Macbeth
- Macbeth can be used as a multi-angle colorimeter of the multi-directional illumination unidirectional light receiving type.
- the resin plate kneads 100 parts by weight of polypropylene having a melt flow rate of 30 g / 10 min (JIS K7210: 1999) and a density of 0.9 g / cm 3 (JIS K7112: 1999) with 3 parts by weight of the master batch. , And produced by injection molding using a mold polished with abrasive cloth of particle size # 800 (JIS R 6001: 1998).
- the resin plate has a flat surface and preferably has a thickness of 2 to 3 mm.
- each a * value when the perpendicular is 45 °
- the light receiving part is 90 °
- the light source is 20 °, 45 °, 75 °, and 110 °
- b * Indicates value is 20 °, 45 °, 75 °, and 110 °
- the condition satisfied by the master batch in the present embodiment focuses on the variation distance of the a * value and b * value due to the difference in the position of the light source, and therefore, simply focuses on the ⁇ a * value and the ⁇ b * value.
- differences in color, impression, aesthetics, etc. in the molded body can be reduced, and a high level of jet black can be obtained.
- D is the total sum when the variation due to the difference in the position of the light source between the a * value and the b * value is calculated as the distance. That is, a molded body having a uniform jet black can be obtained even if the light source and the user are in all directions, such as when the position where the user observes the resin molded body or when the position of the light source changes. .
- D is less than 4.3, more preferably less than 2.5, and even more preferably less than 1.8 from the viewpoint of obtaining a more uniform jet black.
- the difference ⁇ a * between the maximum value and the minimum value of the a * value is less than 2.5, preferably 2.3 or less, and more preferably 1.9 or less. As a result, a more uniform jet black is obtained.
- the a * value is preferably in the range of ⁇ 15 to 15.
- the difference ⁇ b * between the maximum value and the minimum value of the b * value is less than 3.6, preferably 3.4 or less, and more preferably 2.2 or less. As a result, a more uniform jet black is obtained.
- the b * value is preferably in the range of ⁇ 15 to 15.
- the L * value of the resin plate is preferably 35 or less. As a result, a deep black color is obtained.
- the L * value of the resin plate is measured using an integrating sphere spectrophotometer.
- the surface of the resin plate is transferred with the surface of a mold polished with abrasive cloth of particle size # 800 (JIS R 6001: 1998).
- a known method may be used as a polishing method for the mold.
- the black pigment may be either an inorganic pigment or an organic pigment, such as carbon black, black iron oxide (triiron tetroxide), black titanium oxide, copper manganese black, copper chrome black, and cobalt black. Examples include inorganic pigments, organic pigments such as cyanine black, and aniline black.
- a black pigment may be used individually by 1 type, and may be used in combination of 2 or more type.
- carbon black is preferable from the viewpoint of obtaining a uniform jet black.
- examples of carbon black include channel black, oil furnace black, gas furnace black, thermal black, acetylene black, bone black and the like.
- the content of carbon black is preferably 50% by mass or more, more preferably 80% by mass or more, and 95% by mass or more from the viewpoint of obtaining a uniform jet black with respect to the entire black pigment. Is more preferable.
- the content of carbon black may be 100% by mass with respect to the entire black pigment.
- the shape of the black pigment is preferably particulate.
- the average primary particle diameter of the black pigment is preferably 5 nm or more from the viewpoint of obtaining a uniform jet black, more preferably 10 nm or more, and from the viewpoint of reducing lightness and obtaining good dispersibility, 5 ⁇ m or less. It is preferable that it is 1 micrometer or less. Further, from the same viewpoint, the average primary particle size of carbon black is preferably 5 nm or more, more preferably 12 nm or more, on the other hand, preferably 1 ⁇ m or less, more preferably 500 nm or less. Preferably, it is 100 nm or less.
- the average primary particle size of the black pigment is obtained by obtaining a primary particle image of the pigment by observation with a transmission electron microscope (TEM), measuring the particle size of each of about 200 to 300 pigment particles, and calculating the average value. It is done.
- TEM transmission electron microscope
- the specific surface area of carbon black is preferably 10 m 2 / g or more, more preferably 20 m 2 / g or more, and 100 m 2 / g or more from the viewpoint of obtaining a uniform jet black. On the other hand, it is preferably 400 m 2 / g or less, more preferably 300 m 2 / g or less, from the viewpoint of suppressing aggregation of the black pigment and obtaining a uniform black color.
- the specific surface area of carbon black can be measured according to JIS K6217-2.
- the black pigment may have a surface physically or chemically treated. Thereby, good dispersibility is obtained.
- thermoplastic resin for masterbatch The masterbatch thermoplastic resin (base resin) is used for processing into a pellet form as a masterbatch.
- thermoplastic resins for masterbatches include polyolefin resins such as polyethylene resins and polypropylene resins, polystyrene resins, acrylonitrile / butadiene / styrene (ABS) resins, polycarbonate resins, polyamide resins, polyester resins, polybutylene terephthalate resins, and polyresins. Examples thereof include methyl methacrylate resin (PMMA). These may be used individually by 1 type and may mix 2 or more types. From the viewpoint of obtaining an effectively unified jet black, a polyolefin resin is preferable, and a polyethylene resin and a polypropylene resin are more preferable.
- additives such as pigments other than black pigments, ester waxes, polyethylene waxes, antioxidants, ultraviolet absorbers, antistatic agents, flame retardants, interfaces, etc.
- additives such as an activator may be added.
- the pigment other than the black pigment may be either an inorganic pigment or an organic pigment.
- phthalocyanine pigments such as phthalocyanine blue and phthalocyanine green: azo pigments such as azo yellow lake, azo lake red, and monoazo yellow: organic pigments such as polycyclic pigments such as quinacridone pigments, perylene pigments, quinophthalone pigments, and anthraquinone pigments; Inorganic pigments such as ultramarine blue, cobalt, petal, titanium oxide, nickel titanium yellow, and chrome titanium yellow may be contained. These pigments can be used alone or in combination of two or more.
- pigments can be used in combination as appropriate according to the primary average particle diameter, specific surface area, a * value, b * value, L * value, etc. of the black pigment, whereby a uniform jet black can be obtained.
- phthalocyanine pigments are preferably used.
- the content of the black pigment is preferably 10 to 100% by mass, more preferably 10 to 90% by mass, and more preferably 30 to 30% by mass with respect to the entire pigment from the viewpoint of obtaining an effectively unified jet black. More preferably, it is 90 mass%.
- the content of the entire pigment is preferably 15 parts by weight or more, preferably 30 parts by weight or more, more preferably 50 parts by weight or more with respect to 100 parts by weight of the masterbatch thermoplastic resin. .
- the content of the entire pigment is preferably 100 parts by weight or less, more preferably 80 parts by weight or less, with respect to 100 parts by weight of the masterbatch thermoplastic resin.
- Ester wax is used to facilitate uniform blending of pigments.
- the ester wax preferably has a softening temperature of about 100 ° C. or lower.
- montanic acid wax that is solid at room temperature, hydrogenated castor oil, and the like are preferable.
- An aliphatic dihydric alcohol of montanic acid and one or more of ethylene glycol, 1,4-butanediol, 1,6-hexanediol, and the like It is more preferable that the ester is.
- Examples of commercially available products include Hoechst's product “Hoechst Wax E”, BASF's product “E Wax BASF”, and the like.
- Polyethylene wax is used to facilitate uniform blending of pigments.
- the polyethylene wax preferably has a softening point of 115 ° C. or lower. Examples include those obtained by polymerizing ethylene under high temperature and high pressure, those obtained by separating and purifying low molecular weight components of polyethylene polymer, or those obtained by thermally decomposing polyethylene. Those polymerized below are preferred. Further, the obtained polymer may be oxidized or acid-modified. Commercially available products include “High Wax” manufactured by Mitsui Chemicals, “AC” manufactured by Honeywell, and the like.
- the masterbatch in this embodiment is manufactured as follows. First, for example, using a conventional kneader such as a Banbury mixer, kneader, twin screw extruder, etc., kneading black pigment, thermoplastic resin for masterbatch and other additives as necessary, and high concentration in the resin for masterbatch Knead the black pigment. At this time, according to the primary average particle diameter of black pigment, specific surface area and blending amount with the thermoplastic resin for masterbatch, etc., by setting the molding temperature, time, extruder rotation number, etc., the above specific conditions It can be controlled to satisfy. Preferably, the molding temperature is 50 to 200 ° C.
- a master batch is obtained by discharging a mixture of a black pigment and a resin for a master batch from a die of a kneader.
- a uniform jet black can be obtained by satisfying the above specific conditions.
- the above-mentioned index of the specific condition is that the temperature, time, kneading speed, etc. are set according to the primary average particle size, specific surface area, blending amount with the masterbatch thermoplastic resin, etc. And other pigments in combination. Therefore, the range of pigment selection can be expanded without using a specific pigment.
- unified jet black is a resin molded body produced using the master batch of the present embodiment, when the reflection of light changes due to the difference in angle observed by the user or unevenness of the resin molded body. In addition, it is intended to reduce the unevenness such as color, texture, impression, and aesthetics that the user feels through vision, and to feel lofty black.
- the standard jet black includes those that reduce reflection of light and give a calm impression by black.
- (conditions) 100 parts by weight of polypropylene having a melt flow rate of 30 g / 10 min (JIS K7210: 1999) and a density of 0.9 g / cm 3 (JIS K7112: 1999) is kneaded with 3 parts by weight of the master batch, and the particle size # 800 (JIS) R 6001: 1998)
- a resin plate was prepared by injection molding.
- each a * value when the perpendicular is 45 °
- the light receiving part is 90 °
- the light source is 20 °, 45 °, 75 °, and 110 °
- b * Indicates value is 20 °, 45 °, 75 °, and 110 °
- the resin molding material contains the masterbatch mentioned above and resin for dilution. Moreover, the manufacturing method of the resin molding material includes the process of mixing with the masterbatch mentioned above, resin for dilution, and the additive as needed.
- the mixing method is not particularly limited, and a known method can be used.
- the dilution resin is a main raw material used as a material of the molded body, and is used as a resin for diluting the master batch.
- the dilution resin is not particularly limited.
- polyolefin resin such as polyethylene and polypropylene, polystyrene resin, acrylonitrile butadiene styrene (ABS) resin, polycarbonate resin, polyamide resin, polyethylene terephthalate resin, polybutylene terephthalate resin, poly Examples thereof include methyl methacrylate resin (PMMA). These may be used individually by 1 type and may mix 2 or more types.
- a molded object contains the resin molding material mentioned above. Moreover, the manufacturing method of a molded object includes the process of injection-molding the said resin molding material with the additive as needed.
- the injection molding is not particularly limited, and a known method can be used.
- the molded body of the present embodiment can obtain a jet black with a high standard. Appearance is important, and it can be used in the fields of electronic / electrical / OA equipment processed into various shapes, furniture, miscellaneous goods, automobile interior parts, and the like. Especially, it is suitable in the use for which a uniform jet black is required.
- a masterbatch containing a black pigment and a masterbatch thermoplastic resin that satisfies the above conditions can be used together with a dilution resin to produce a resin molding material.
- the pigments used in Examples and Comparative Examples are as follows. Black 7 (product name: BP880: manufacturer Cabot), primary average particle size 16 nm, specific surface area 220 m 2 / g ⁇ Green7 (Product name Heliogen Green K8730: manufacturer BASF) ⁇ Green50 (Product name 42-633A: Manufacturer Toago Material Technology Co., Ltd.) ⁇ Blue15: 1 (Product name Lionol Blue SL: Manufacturer Toyocolor Co., Ltd.) ⁇ Blue29 (Product name Ultramarine D-981: Manufacturer Daiichi Kasei Kogyo Co., Ltd.) ⁇ Red122 (Product name Cinquasia Pink K4430FP: manufacturer BASF) ⁇ Red101 (product name Bayferrox 130M: manufacturer LANXESS) ⁇ Yellow138 (product name PA yellow 890D: manufacturer BASF) ⁇ Brown24 (product name 42-134A: manufacturer Toago Material Technology Co., Ltd.)
- each a * value when the perpendicular is 45 °
- the light receiving part is 90 °
- the light source is 20 °, 45 °, 75 °, and 110 °
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Abstract
Description
また、特許文献3には、三次元変角分光測色システムを用いて、記録画像に対して45°方向からの光を照射し、逆方向の45°の位置で受光することにとって正反射光の彩度を算出し、正反射光の彩度が小さいほどブロンズが目立ちにくいことが開示されている。また、当該文献において、ブロンズ色の彩度はC*=√(a*^2+b*^2)とされている。
そのため、ブロンズ現象を抑制するだけでは、使用者が要求するより高い水準での、統一された漆黒を得ることができなかった。
すなわち、本発明者は、使用者が感じられる色味、印象、美感等が異なる原因として、固定した樹脂成形体に光を照射したときに、光源の位置の変化により受光される光のL*a*b*表色系におけるa*値、b*値が異なることに着目した。そして、特定の条件下におけるa*値、b*値の変動について新たな設計指針を立て、かかるa*値、b*値が一定の条件を満たすことによって、使用者が樹脂成形体をどの角度から観察しても、色味、印象、美感等の違いを感じにくくなる結果、高い水準での統一された漆黒を得ることができることを初めて見出し、本発明を完成した。
(条件)
前記マスターバッチ3重量部に対し、メルトフローレート30g/10min(JIS K7210:1999)、密度0.9g/cm3(JIS K7112:1999)であるポリプロピレン100重量部を混練し、粒度#800(JIS R 6001:1998)の研磨布紙で研磨した金型を用い、射出成形により樹脂プレートを作成したとき、
前記樹脂プレートの表面のL*a*b*表色系におけるa*値、b*値が、次式(1)~(4)を満たす。
D=[(a*値20-a*値45)2+(b*値20-b*値45)2]1/2+[(a*値45-a*値75)2+(b*値45-b*値75)2]1/2+[(a*値75-a*値110)2+(b*値75-b*値110)2]1/2 (1)
D<4.3 (2)
Δa*<2.5 (3)
Δb*<3.6 (4)
(式中、a*値20、a*値45、a*値75、a*値110、b*値20、b*値45、b*値75、及びb*値110は、多方向照明一方向受光式のマルチアングル測色計を用いて、垂線を45°、受光部を90°とし、光源を20°、45°、75°、及び110°としたときのそれぞれのa*値、b*値を示す。
Δa*=(a*値20、a*値45、a*値75、a*値110のうちの最大値)-(a*値20、a*値45、a*値75、a*値110のうちの最小値)
Δb*=(b*値20、b*値45、b*値75、b*値110のうちの最大値)-(b*値20、b*値45、b*値75、b*値110のうちの最小値))
樹脂プレートは、マスターバッチ3重量部に対し、メルトフローレート30g/10min(JIS K7210:1999)、密度0.9g/cm3(JIS K7112:1999)であるポリプロピレン100重量部を混練し、粒度#800(JIS R 6001:1998)の研磨布紙で研磨した金型を用い、射出成形により作成される。
D=[(a*値20-a*値45)2+(b*値20-b*値45)2]1/2+[(a*値45-a*値75)2+(b*値45-b*値75)2]1/2+[(a*値75-a*値110)2+(b*値75-b*値110)2]1/2 (1)
D<4.3 (2)
Δa*<2.5 (3)
Δb*<3.6 (4)
(式中、a*値20、a*値45、a*値75、a*値110、b*値20、b*値45、b*値75、及びb*値110は、多方向照明一方向受光式のマルチアングル測色計を用いて、垂線を45°、受光部を90°とし、光源を20°、45°、75°、及び110°としたときのそれぞれのa*値、b*値を示す。
Δa*=(a*値20、a*値45、a*値75、a*値110のうちの最大値)-(a*値20、a*値45、a*値75、a*値110のうちの最小値)
Δb*=(b*値20、b*値45、b*値75、b*値110のうちの最大値)-(b*値20、b*値45、b*値75、b*値110のうちの最小値))
これに対し、本実施形態におけるマスターバッチが満たす条件は、光源の位置を多段階的に変化させることにより、使用者が樹脂成形体を実際に使用する状況を再現するものである。くわえて、本実施形態におけるマスターバッチが満たす条件は、光源の位置の違いによるa*値、b*値の変動距離に着目するものであるため、単にΔa*値、Δb*値に着目するよりもさらに成形体における色味、印象、美感等の違いを低減でき、高水準での統一された漆黒を得ることができる。
(i)マスターバッチ用熱可塑性樹脂と黒色顔料との組み合わせ
(ii)黒色顔料の選択
(iii)マスターバッチの製造方法
(iv)黒色顔料と他の顔料との組み合わせ
(黒色顔料)
黒色顔料としては、無機顔料、有機顔料のいずれであってもよく、例えば、カーボンブラック、黒酸化鉄(四三酸化鉄)、黒酸化チタン、銅マンガンブラック、銅クロムブラック、及びコバルトブラックなどの無機顔料、シアニンブラック、及びアニリンブラックなどの有機顔料が挙げられる。黒色顔料は、1種を単独で用いてもよく、2種以上を組み合わせて用いてもよい。
カーボンブラックの含有量は、黒色顔料全体に対し、統一された漆黒を得る観点から、50質量%以上であることが好ましく、80質量%以上であることがより好ましく、95質量%以上であることがさらに好ましい。カーボンブラックの含有量は、黒色顔料全体に対し、100質量%としてもよい。
黒色顔料の平均一次粒子径は、統一された漆黒を得る観点から、5nm以上であることが好ましく、10nm以上であることがより好ましく、明度を下げ、良好な分散性を得る観点から、5μm以下であることが好ましく、1μm以下であることがより好ましい。
また、カーボンブラックの平均一次粒子径は、同様の観点から、5nm以上であることが好ましく、12nm以上であることがより好ましく、一方、1μm以下であることが好ましく、500nm以下であることがより好ましく、100nm以下であることがさらに好ましい。
マスターバッチ用熱可塑性樹脂(ベース樹脂)は、マスターバッチとしてペレット状に加工するために用いられる。マスターバッチ用熱可塑性樹脂としては、例えば、ポリエチレン樹脂、ポリプロピレン樹脂等のポリオレフィン樹脂、ポリスチレン樹脂、アクリロニトリル・ブタジエン・スチレン(ABS)樹脂、ポリカーボネート樹脂、ポリアミド樹脂、ポリエステル樹脂、ポリブチレンテレフタレート樹脂、及びポリメタクリル酸メチル樹脂(PMMA)等が挙げられる。これらは、1種を単独で用いてもよいし、2種以上を混合してもよい。
効果的に統一された漆黒を得る観点から、ポリオレフィン樹脂が好ましく、ポリエチレン樹脂、ポリプロピレン樹脂がより好ましい。
なお、マスターバッチには、本発明の効果を損なわない範囲で、黒色顔料以外の顔料、エステル系ワックス、ポリエチレンワックス、酸化防止剤、紫外線吸収剤、帯電防止剤等各種安定剤、難燃剤、界面活性剤等各種の添加剤を加えてもよい。
なかでも、フタロシアニン顔料を用いることが好ましい。また、2種以上を用いる場合、補色の関係になるように用いることが好ましい。例えば、赤系の有機顔料を用いた場合は、緑系の有機顔料を組み合わせることで、統一感を得ることができる。
本実施形態におけるマスターバッチは、以下のようにして製造される。
まず、例えば、バンバリミキサー、ニーダー、二軸押出機等といった通常の混練機を用い、黒色顔料、マスターバッチ用熱可塑性樹脂及びその他必要に応じた添加剤を混練し、マスターバッチ用樹脂に高濃度に黒色顔料を練り込む。この際、黒色顔料の一次平均粒子径、比表面積及びマスターバッチ用熱可塑性樹脂との配合量等に合わせて、成形温度、時間、押出機回転数等を設定することにより、上記の特定の条件を満たすよう制御することができる。好ましくは、成型温度を50~200℃、押出機回転数200~300rpm、より好ましくは、成型温度を50~160℃、押出機回転数200~300rpmとすることができる。
つぎに、黒色顔料及びマスターバッチ用樹脂の混合物を混練機のダイスより吐出することによってマスターバッチが得られる。
黒色顔料と、マスターバッチ用熱可塑性樹脂と、を含むマスターバッチの評価方法であって、以下の条件を満たすか否かによってマスターバッチを評価する。
(条件)
前記マスターバッチ3重量部に対し、メルトフローレート30g/10min(JIS K7210:1999)、密度0.9g/cm3(JIS K7112:1999)であるポリプロピレン100重量部を混練し、粒度#800(JIS R 6001:1998)の研磨布紙で研磨した金型を用い、射出成形により樹脂プレートを作成したとき、
前記樹脂プレートの表面のL*a*b*表色系におけるa*値、b*値が、次式(1)~(4)を満たす。
D=[(a*値20-a*値45)2+(b*値20-b*値45)2]1/2+[(a*値45-a*値75)2+(b*値45-b*値75)2]1/2+[(a*値75-a*値110)2+(b*値75-b*値110)2]1/2 (1)
D<4.3 (2)
Δa*<2.5 (3)
Δb*<3.6 (4)
(式中、a*値20、a*値45、a*値75、a*値110、b*値20、b*値45、b*値75、及びb*値110は、多方向照明一方向受光式のマルチアングル測色計を用いて、垂線を45°、受光部を90°とし、光源を20°、45°、75°、及び110°としたときのそれぞれのa*値、b*値を示す。
Δa*=(a*値20、a*値45、a*値75、a*値110のうちの最大値)-(a*値20、a*値45、a*値75、a*値110のうちの最小値)
Δb*=(b*値20、b*値45、b*値75、b*値110のうちの最大値)-(b*値20、b*値45、b*値75、b*値110のうちの最小値))
樹脂成形材料は、上述したマスターバッチと、希釈用樹脂と、を含む。
また、樹脂成形材料の製造方法は、上述したマスターバッチと、希釈用樹脂と、必要に応じた添加剤とともに、混合する工程を含む。混合方法は、特に限定されず、公知の方法を用いることができる。
これらは、1種を単独で用いてもよいし、2種以上を混合してもよい。
成形体は、上述した樹脂成形材料を含む。
また、成形体の製造方法は、上記樹脂成形材料を、必要に応じた添加剤とともに、射出成形する工程を含む。射出成形は、特に限定されず、公知の方法を用いることができる。
例えば、黒色顔料、及びマスターバッチ用熱可塑性樹脂を含み、上記の条件を満たすマスターバッチを、希釈用樹脂とともに用いて樹脂成形材料を製造するために使用することもできる。
実施例及び比較例で使用した顔料は、以下の通りである。
・Black7(製品名:BP880:製造元Cabot社)、一次平均粒子径16nm、比表面積220m2/g
・Green7(製品名 Heliogen Green K8730:製造元 BASF社)
・Green50(製品名 42-633A:製造元 東罐マテリアル・テクノロジー株式会社)
・Blue15:1(製品名 Lionol Blue SL:製造元 トーヨーカラー株式会社)
・Blue29(製品名 群青 D-981:製造元 第一化成工業株式会社)
・Red122(製品名 Cinquasia Pink K4430FP:製造元 BASF社)
・Red101(製品名 Bayferrox 130M:製造元 LANXESS社)
・Yellow138(製品名 PAイエロー890D:製造元 BASF社)
・Brown24(製品名 42-134A:製造元 東罐マテリアル・テクノロジー株式会社)
・実施例1~12、比較例1~12
マスターバッチ中の全顔料濃度が、表1に示す濃度となるように、全顔料と、LLDPE(線状低密度ポリエチレン)(ウルトゼックス 30501J、株式会社プライムポリマー製)とを、二軸押出機を用いて、成型温度を50~160℃、押出機回転数200rpmで混練し、得られた混練物をダイスより吐出することによってマスターバッチを得た。
全顔料の組成は、表2~7に示すものとした。
・比較例13,14
上記実施例7,12について、それぞれ成型温度を50~230℃にした以外は、同様にして、マスターバッチを得た。
まず、得られたマスターバッチ3重量部に対し、ポリプロピレン100重量部(ノバテックPP BC03B、メルトフローレート30g/10min(JIS K7210:1999)、密度0.9g/cm3(JIS K7112:1999)、日本ポリプロ株式会社製)を連続二軸押出機にて混練し、粒度#800(JIS R 6001:1998)の研磨布紙で研磨した金型を用い、射出成形により樹脂プレートを作成した。
作成した樹脂プレートは、大きさ:80×50mm、厚み2mmであった。
樹脂プレートについて、多方向照明一方向受光式のマルチアングル測色計(「CE-741GL」(Macbeth社製))を用いて、垂線を45°、受光部を90°、光源を20°、45°、75°、110°としたときのそれぞれのa*値、b*値を測定した。
また、測定されたa*値の最大値と最小値の差をΔa*、測定されたb*値の最大値と最小値の差Δb*とした。
結果を表2~7に示す。
Dは次式(1)に当てはめ、算出した。結果を表2~7に示す。
D=[(a*値20-a*値45)2+(b*値20-b*値45)2]1/2+[(a*値45-a*値75)2+(b*値45-b*値75)2]1/2+[(a*値75-a*値110)2+(b*値75-b*値110)2]1/2 (1)
(式中、a*値20、a*値45、a*値75、a*値110、b*値20、b*値45、b*値75、及びb*値110は、多方向照明一方向受光式のマルチアングル測色計を用いて、垂線を45°、受光部を90°とし、光源を20°、45°、75°、及び110°としたときのそれぞれのa*値、b*値を示す。)
評価は、以下のようにして行った。
晴天の屋外にて、午前10時から午後2時までの自然光(太陽光)の下、図2(a)~(d)に示すように、樹脂プレートPに対し法線n(垂線)を45°、観察者を90°とし、樹脂プレートPが観察者の影にならないよう位置を定め、樹脂プレートPの角度を、20°、45°、75°、及び110°に変化させて、樹脂プレートPの外観を目視で観察した。観察した結果、樹脂プレートPの統一された漆黒について、1~4の4段階で評価した。数値が低いほど、統一された漆黒が得られたことを表す。結果を表9に示す。
Claims (14)
- 黒色顔料、及びマスターバッチ用熱可塑性樹脂を含み、以下の条件を満たす、マスターバッチ。
(条件)
前記マスターバッチ3重量部に対し、メルトフローレート30g/10min(JIS K7210:1999)、密度0.9g/cm3(JIS K7112:1999)であるポリプロピレン100重量部を混練し、粒度#800(JIS R 6001:1998)の研磨布紙で研磨した金型を用い、射出成形により樹脂プレートを作成したとき、
前記樹脂プレートの表面のL*a*b*表色系におけるa*値、b*値が、次式(1)~(4)を満たす。
D=[(a*値20-a*値45)2+(b*値20-b*値45)2]1/2+[(a*値45-a*値75)2+(b*値45-b*値75)2]1/2+[(a*値75-a*値110)2+(b*値75-b*値110)2]1/2 (1)
D<4.3 (2)
Δa*<2.5 (3)
Δb*<3.6 (4)
(式中、a*値20、a*値45、a*値75、a*値110、b*値20、b*値45、b*値75、及びb*値110は、多方向照明一方向受光式のマルチアングル測色計を用いて、垂線を45°、受光部を90°とし、光源を20°、45°、75°、及び110°としたときのそれぞれのa*値、b*値を示す。
Δa*=(a*値20、a*値45、a*値75、a*値110のうちの最大値)-(a*値20、a*値45、a*値75、a*値110のうちの最小値)
Δb*=(b*値20、b*値45、b*値75、b*値110のうちの最大値)-(b*値20、b*値45、b*値75、b*値110のうちの最小値)) - 請求項1に記載のマスターバッチにおいて、
前記黒色顔料が、カーボンブラックを含む、マスターバッチ。 - 請求項1または2に記載のマスターバッチにおいて、
前記黒色顔料の平均一次粒径が、5nm~1μmである、マスターバッチ。 - 請求項2に記載のマスターバッチにおいて、
前記カーボンブラックの比表面積が、10~400m2/gである、マスターバッチ。 - 請求項2乃至4いずれか一項に記載のマスターバッチにおいて、
前記黒色顔料がカーボンブラックのみからなる、マスターバッチ。 - 請求項1乃至5いずれか一項に記載のマスターバッチにおいて、
前記黒色顔料以外の他の顔料を含む、マスターバッチ。 - 請求項1乃至6いずれか一項に記載のマスターバッチにおいて、
前記マスターバッチ用熱可塑性樹脂が、ポリオレフィン樹脂、ポリスチレン樹脂、アクリロニトリル・ブタジエン・スチレン(ABS)樹脂、ポリカーボネート樹脂、ポリアミド樹脂、ポリエステル樹脂、ポリブチレンテレフタレート樹脂、及びポリメタクリル酸メチル樹脂(PMMA)の中から選ばれる少なくとも1種を含む、マスターバッチ。 - 請求項7に記載のマスターバッチにおいて、
前記マスターバッチ用熱可塑性樹脂が、ポリプロピレン、またはポリエチレンのいずれかを含む、マスターバッチ。 - 請求項6に記載のマスターバッチにおいて、
前記他の顔料が、フタロシアニン顔料、アゾ顔料、多環式顔料、群青、コバルト、弁柄、酸化チタン、ニッケルチタンイエロー、およびクロムチタンイエローのなかから選ばれる1種または2種以上を含む、マスターバッチ。 - 請求項1乃至9いずれか一項に記載のマスターバッチと、希釈用樹脂と、を含む、樹脂成形材料。
- 請求項10に記載の樹脂成形材料を含む成形体。
- 請求項1乃至9いずれか一項に記載のマスターバッチと、希釈用樹脂と、を混合する工程を含む、樹脂成形材料の製造方法。
- 請求項10に記載の樹脂成形材料を射出成形する工程を含む、成形体の製造方法。
- 黒色顔料と、マスターバッチ用熱可塑性樹脂と、を含むマスターバッチの評価方法であって、以下の条件を満たすか否かによって評価するマスターバッチの評価方法。
(条件)
前記マスターバッチ3重量部に対し、メルトフローレート30g/10min(JIS K7210:1999)、密度0.9g/cm3(JIS K7112:1999)であるポリプロピレン100重量部を混練し、粒度#800(JIS R 6001:1998)の研磨布紙で研磨した金型を用い、射出成形により樹脂プレートを作成したとき、
前記樹脂プレートの表面のL*a*b*表色系におけるa*値、b*値が、次式(1)~(4)を満たす。
D=[(a*値20-a*値45)2+(b*値20-b*値45)2]1/2+[(a*値45-a*値75)2+(b*値45-b*値75)2]1/2+[(a*値75-a*値110)2+(b*値75-b*値110)2]1/2 (1)
D<4.3 (2)
Δa*<2.5 (3)
Δb*<3.6 (4)
(式中、a*値20、a*値45、a*値75、a*値110、b*値20、b*値45、b*値75、及びb*値110は、多方向照明一方向受光式のマルチアングル測色計を用いて、垂線を45°、受光部を90°とし、光源を20°、45°、75°、及び110°としたときのそれぞれのa*値、b*値を示す。
Δa*=(a*値20、a*値45、a*値75、a*値110のうちの最大値)-(a*値20、a*値45、a*値75、a*値110のうちの最小値)
Δb*=(b*値20、b*値45、b*値75、b*値110のうちの最大値)-(b*値20、b*値45、b*値75、b*値110のうちの最小値))
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EP3409710A4 (en) | 2019-08-28 |
MX2018009156A (es) | 2018-12-06 |
EP3409710A1 (en) | 2018-12-05 |
JP6277335B2 (ja) | 2018-02-07 |
CN108602964A (zh) | 2018-09-28 |
US20190023858A1 (en) | 2019-01-24 |
MX387699B (es) | 2025-03-18 |
EP3409710B1 (en) | 2022-08-10 |
JPWO2017130608A1 (ja) | 2018-03-01 |
US11548988B2 (en) | 2023-01-10 |
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