JP2003313371A - Plastic composition for coloring and its molded product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a composition for bluing coloring having excellent pigment dispersibility, thermal discoloration resistance and high temperature workability and wide color control width and to provide its molded product. <P>SOLUTION: In a resin composition for bluing coloring containing an inorganic pigment and a polyolefin resin (d), the inorganic pigment contains a cobalt borate pigment (a) obtained by heat-treating 100 pts.wt. cobalt borate fired product and 5-25 pts.wt. metal carbonate, and a weight-average particle diameter of the cobalt borate pigment (a) is 0.3-8.0 μm and a concentration of the cobalt borate pigment (a) is 0.001-70 wt.% to all of the resin composition. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a resin composition for bluing coloring. The resin composition of the present invention is used for photographic printing paper and the like.

[0002]

2. Description of the Related Art Photographic printing paper is manufactured by laminating both sides of a paper support with a polyolefin resin thin film. This is because the permeation of the treatment liquid into the paper support during development and fixing is suppressed, the washing and drying times are shortened, the expansion and contraction of the paper support due to washing and drying is suppressed, and dimensional stability is maintained. is there.

On the surface of the paper support on which the image is formed,
A white thin film is prepared by adding a titanium oxide pigment to a polyolefin resin so as to increase the whiteness and hide the paper support and obtain a sharp photograph. However, when the titanium oxide pigment alone is used for coloring, the polyolefin resin thin film looks visually yellowish even if it is white, and is not a color that is favored for the above-mentioned use of the photographic paper support. In order to improve it, chromatic pigments of blue, violet and red are added to the white layer, and an operation called bluing is performed to improve the visual whiteness.

In addition to photographic printing paper applications, white polyolefin resin films for packaging applications and building materials applications,
The laminate film is similarly blued to improve the visual whiteness. The polyolefin layer on the image forming side of the photographic printing paper support is formed by extrusion and dry lamination to the paper support. In order to sufficiently adhere the paper support and the polyolefin resin layer, it is usually processed at a high temperature of 300 to 350 ° C. The white polyolefin resin film for other uses is generally formed at high temperature and high speed for the purpose of improving productivity, and the processing temperature thereof is 250 ° C. or higher. Blue, purple, and red chromatic color pigments used for bluing are roughly classified into organic pigments and inorganic pigments.

In the organic pigments, as the blue color, phthalocyanine blue is Pigment Blue 15, Pigment Blue 15: 1, Pigment Blue 15: 2, Pigment Blue 15: 3, Pigment Blue 15: 4, and Induslen Blue. Blue 60, purple is pigment violet 23 which is dioxazine violet, red is pigment red 254 which is diketopyrrolopyrrole red, pigment red 122 which is quinacridone red, pigmentlet 202, pigment violet 19 and pigment which is perylene red. Red 178, azo red pigment violet 247 and the like. However, in a white polyolefin resin film molded product that has been blued with an organic pigment, the organic pigment concentration is 0.001 to 0.05% by weight, whereas the titanium oxide pigment concentration is 3 to 30% by weight. However, all organic pigments were discolored by heat during the molding process, and it was difficult to obtain a molded product having a sufficiently stable color.

Further, since the above organic pigments are difficult to disperse and it is difficult to obtain sufficient dispersibility only with a polyolefin resin, it is necessary to disperse them in advance with a low molecular weight polyethylene (polyethylene wax) having a molecular weight of 1,000 to 5,000. The low-molecular-weight polyethylene was thermally deteriorated and decomposed during high-temperature molding, and the deteriorated decomposed product was attached and deposited on the die lip opening of the extruder, causing a phenomenon of icicle-like growth. (The phenomenon in which the thermally deteriorated decomposition product adheres and grows at the die lip opening is referred to as die lip contamination below.) When this die lip contamination occurs, streak-like scratches are formed on the film molded product, significantly impairing the product value, Further, in order to remove the contamination of the die lip that has once occurred, there is only a method of once stopping the extrusion molding machine and washing the die lip, which has a problem that productivity is remarkably deteriorated.

On the other hand, with inorganic pigments, blue and purple are
Pigment Blue 29, which is ultramarine blue, Pigment Blue 28 and Pigment Blue 36, which are cobalt blue, and Pigment Violet 14, which is a cobalt phosphate pigment, are used, and there is no discoloration due to heat during high temperature molding processing, and a stable color molded product is obtained. be able to. Furthermore, these inorganic pigments are easily dispersible and can be easily dispersed only by the polyolefin resin without using a dispersant such as low molecular weight polyethylene. However, with the above blue and purple inorganic pigments alone, sufficient color adjustment in bluing is impossible, and reddishness cannot be enhanced while maintaining bluish intensity. There was no choice but to use Pigment Red 259 or Pigment Violet 15 which is purple ultramarine.

Pink ultramarine (Pigment Red 25
9), purple ultramarine (Pigment Violet 15) and blue ultramarine (Pigment Blue 29) are all zeolite-like substances. Purple ultramarine is obtained by reacting blue ultramarine with ammonium chloride and ion-exchange with sodium in blue ultramarine, and pink ultramarine is further reacted with purple ultramarine with ammonium nitrate, or blue ultramarine with ammonium chloride and ammonium nitrate at the same time. It is obtained by reacting and ion-exchange with sodium. Of these, when purple ultramarine and pink ultramarine are subjected to high temperature molding, ammonium ions in the introduced pigment are decomposed, many acid sites are formed on the pigment surface, and high catalytic activity is exhibited.

The catalytic activity of pink ultramarine is higher,
For both purple and pink ultramarine, the decomposition of ammonium ions and the formation of acid sites proceed most and the catalytic activity becomes highest at a heating temperature of around 300 ° C.

As a result, when purple ultramarine or pink ultramarine is used, the polyolefin resin in the molded product undergoes thermal degradation and decomposition due to the catalytic action of these pigments during high temperature molding processing, causing significant die lip contamination.

[0011]

The present invention solves the above problems and provides a bluing coloring composition having excellent pigment dispersibility, heat discoloration resistance, high temperature processability, and a wide color adjustment range, and a molded product thereof. The purpose is to provide.

[0012]

As a result of diligent efforts to achieve the above objects, the present inventors have found that a cobalt borate pigment treated with zinc carbonate to improve water resistance and adjusted to a specific particle size is used. By using a polyolefin resin and a bluing coloring composition containing a blue inorganic pigment and titanium oxide as needed, a wide range of color adjustment is possible, and excellent pigment dispersibility provides excellent surface smoothness and no fading. The inventors have found that a polyolefin resin molded product having excellent resistance to water and heat discoloration and excellent high-temperature processability without die lip contamination can be obtained, and the present invention has been completed.

That is, the present invention is a resin composition for bluing coloring, comprising an inorganic pigment and a polyolefin resin (d), wherein the inorganic pigment is 100 parts by weight of cobalt borate calcined product and 5 to 25 metal carbonate. And a cobalt borate pigment (a) obtained by heat treating a part by weight of the cobalt borate pigment, and the weight average particle diameter of the cobalt borate pigment (a) is 0.3 to 8.0 μm.
The concentration of the cobalt borate pigment (a) is 0.001 to 70% by weight with respect to the entire resin composition, and relates to a bluing coloring resin composition. Further, the present invention is
Further, the present invention relates to the resin composition for bluing coloring, which contains 0.001 to 70% by weight of titanium oxide (c) as an inorganic pigment, based on the entire resin composition.

The present invention further relates to the resin composition for bluing coloring, wherein the inorganic pigment contains a blue inorganic pigment (b). The present invention also relates to a resin molded product containing the bluing coloring resin composition.

The present invention also relates to a photographic printing material obtained by molding the above-mentioned molded product on a support.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below.
The bluing resin composition of the present invention is a cobalt borate pigment.
(a) and a polyolefin resin (d), and if necessary, a blue inorganic pigment (b) or a titanium oxide pigment (c) are mixed.

Cobalt borate pigment (a) used in the present invention
Is a cobalt borate fired body obtained by firing an oxide containing cobalt oxide or boron oxide, which is treated with a metal carbonate such as zinc carbonate in order to improve water resistance.

As the cobalt borate fired body, for example,
Pigment Violet 48 includes a composite oxide pigment obtained by firing cobalt oxide, magnesium oxide, or boron oxide.

The weight average particle size of the cobalt borate pigment (a) used in the present invention is 0.3 to 8 μm, more preferably 1 to
It is 3 μm. If it is less than 0.3 μm, the dispersibility is deteriorated due to secondary aggregation of pigment particles, and if it exceeds 8 μm, the coloring power is extremely lowered. The weight average particle size of the cobalt borate pigment (a) can be measured with a Nikkiso Microtrac particle size analyzer after adding 0.05 g of the pigment to 30 ml of distilled water and leaving it in the ultrasonic disperser for 1 minute. .

In the cobalt borate fired body, water is hydrogen-bonded to oxygen coordinated with cobalt in the fired body by contact with water, and the bond between cobalt and oxygen in the fired body is partially cut. , Fading.

However, the cobalt borate pigment (a) of the present invention
Treats the cobalt borate fired body with a metal carbonate such as zinc carbonate, and coordinates cobalt in the cobalt borate fired body with a metal carbonate such as zinc carbonate to prevent water from entering and improve water resistance. Can be made.

The amount of the metal carbonate such as zinc carbonate to be treated is 5 to 25 parts by weight, preferably 7 to 100 parts by weight of the cobalt borate pigment fired body.
~ 20 parts by weight. If it is less than 5 parts by weight, no improvement in water resistance is observed, and if it exceeds 25 parts by weight, coloring of the pigment itself is deteriorated.

The treatment temperature of the metal carbonate such as zinc carbonate of the cobalt borate pigment fired body is 200 to 400 ° C.
~ 10 hours. If the treatment is carried out at less than 200 ° C., sufficient coordination between cobalt and a metal carbonate such as zinc carbonate cannot be obtained, and the improvement of water resistance tends to be insufficient. If the treatment temperature exceeds 400 ° C, decomposition of zinc carbonate will proceed,
It is difficult to expect improvement in water resistance.

The concentration of the cobalt borate pigment (a) in the bluing coloring composition of the present invention is 0.001 to 70% by weight, particularly preferably 0.1 to 50% by weight. 0.001
If it is less than 10% by weight, coloring of the cobalt borate pigment is not observed, and if it exceeds 70% by weight, dispersibility is remarkably reduced.

The bluing coloring composition of the present invention has a form called a masterbatch containing a high concentration of an inorganic pigment described below and a form called a compound in which the masterbatch and an olefin resin are mixed and mixed. There is.

The concentration of the cobalt borate pigment (a) in the compound is 0.001 to 10% by weight, particularly 0.1 to 7%.
Weight percent is preferred. If it is less than 0.001% by weight, the coloring of the cobalt borate pigment is not recognized, and if it exceeds 10% by weight, the whiteness is extremely lowered to give a red color.

The blue inorganic pigment (b) used in the present invention is used for adjusting the bluish tint of the coloring because the cobalt borate pigment (a) is reddish. Therefore, a metal oxide pigment such as Pigment Violet 14, which is a cobalt phosphate pigment, Pigment Blue 28 or Pigment Blue 36, which is cobalt blue, and Pigment Blue 29, which is an ultramarine blue, which are more bluish than cobalt borate pigment (a), is suitable. Is.

Specifically, the cobalt phosphate pigment is a composite oxide pigment obtained by firing cobalt oxide and phosphorus oxide. Cobalt blue is a composite oxide pigment obtained by firing cobalt oxide, aluminum oxide or cobalt oxide, aluminum oxide, and chromium oxide. Ultramarine is a complex oxide pigment containing silicon oxide, aluminum oxide, sodium oxide, and bound sulfur as main components, and containing sodium sulfate, free sulfur, and the like as impurities. The concentration of the blue inorganic pigment (b) in the bluing coloring composition of the present invention is 0.001 to 70% by weight, particularly preferably 0.1 to 50% by weight. 0.
If it is less than 001% by weight, coloring of the blue inorganic pigment is not recognized, and if it exceeds 70% by weight, the dispersibility is remarkably reduced.

The concentration of the blue inorganic pigment (b) in the polyolefin resin molded product is 0.001 to 10% by weight, preferably 0.1 to 5% by weight. If it is less than 0.001% by weight, the coloring of the blue inorganic pigment is not recognized, and if it exceeds 10% by weight, the whiteness is extremely lowered and it becomes blue.

The titanium oxide pigment (c) used in the present invention is
It may be either anatase type or rutile type, and may be produced by any of the chlorine method and the sulfuric acid method. In order to improve the light resistance and heat resistance stability of the titanium oxide pigment and the dispersibility thereof, the surface thereof is previously formed of aluminum oxide, silicon oxide,
It is preferably covered with an inorganic substance such as calcium oxide or zirconium oxide or a hydrate thereof. It is preferable to add 0.1 to 0.8% by weight (in terms of inorganic oxide) of these, alone or in combination of two or more, to 100% by weight of the titanium oxide pigment.

The pigment used in the present invention, that is, the cobalt borate pigment (a), the blue inorganic pigment (b), and the titanium oxide pigment (c) can be used even if they are not surface-treated. A surface-treated product is preferable in order to prevent die lip contamination by improving the affinity between the resin and the pigment.
Examples of the surface treatment agent include polyhydric alcohol, alkyldisilazane, alkanolamine, silicone oil, modified silicone, titanium coupling agent, and silane coupling agent.

The amount of the surface treatment agent is 100% by weight of the pigment.
On the other hand, it is preferable to treat 0.01 to 5% by weight. 5
If the content is more than 10% by weight, the surface treatment agent itself is thermally decomposed at the time of high-temperature molding, so that foaming, lumps, etc. are generated in the produced molded product, which is not preferable. If it is less than 0.01% by weight, the amount of the surface treatment agent on the surface of the pigment is insufficient, and the effect of the surface treatment such as dispersibility cannot be seen.

The concentration of the titanium oxide pigment (c) in the bluing coloring composition of the present invention is 0.001 to 70% by weight, particularly preferably 1 to 60% by weight. If it is less than 0.001% by weight, sufficient whiteness cannot be obtained, and if it exceeds 70% by weight, sufficient dispersibility cannot be obtained and defects such as spots due to aggregated particles occur. The concentration of the titanium oxide pigment (c) in the polyolefin resin molded product is 0.5 to 40% by weight, preferably 1 to 30% by weight. If it is less than 0.5% by weight, sufficient whiteness and concealing property cannot be obtained, and if it exceeds 40% by weight, not only the physical properties of the molded product are remarkably deteriorated, but also moldability such as contamination of die lip during molding is processed. Cause defects.

Polyolefin resin (d) used in the present invention
As, crystalline or amorphous polypropylene, polybutene-1, poly4-methylpentene-1, low density polyethylene or high density polyethylene, EPDM resin, modified polypropylene, modified polyethylene, ethylene-vinyl acetate copolymer, ethylene- Acrylic acid copolymer, ethylene-
Examples include methyl acrylate copolymer, ethylene-ethyl acrylate copolymer, random copolymer of ethylene and propylene, block or graft copolymer, copolymer of α-olefin and ethylene or propylene, and copolymerization of ethylene or propylene. As the α-olefin to be combined, 1-butene, 1-hexene, 1-heptene, 1
-Octene, 4-methyl 1-pentene, 1-decene, 1
-Dodecene, 1-tetradecene, 1-hexadecene, 1
-Octadecene and the like. The concentration of the polyolefin resin (d) in the blueing coloring resin composition of the present invention is 30 to 99.999% by weight, preferably 35% by weight or more. If it is less than 30% by weight, the shape of the composition cannot be maintained.

The resin composition for bluing coloring of the present invention is produced by melt-kneading with a batch-type kneader such as a Banbury mixer, a twin-screw extruder, a single-screw extruder or a rotor-type twin-screw kneader. It is not necessary to limit the kneading machine. The melt-kneading temperature varies slightly depending on the material type and composition used,
It is preferably 280 ° C or lower. If the kneading temperature exceeds 280 ° C., heat deterioration or thermal decomposition of the resin is likely to occur.

The bluing coloring resin composition of the present invention contains a pigment in a high concentration and is used for molding by diluting with a polyolefin resin (uncolored polyolefin resin for dilution) during molding, It may be a beaded bluing coloring composition (hereinafter referred to as a masterbatch), or the pigment concentration is relatively low, the compounding ratio of the material is the same as that of the molded product, and it is not diluted with a diluted polyolefin resin. Alternatively, it may be a pelletized bluing coloring composition (hereinafter referred to as a compound) which is molded as it is.

Comparing the masterbatch and the compound, there is no great difference in the processing steps for obtaining them. The cost of the masterbatch is slightly higher than that of the compound because the masterbatch contains a high concentration of pigment, but in the case of the masterbatch,
Since the masterbatch can be diluted with an inexpensive uncolored polyolefin resin to obtain a molded product, the molded product molded using the masterbatch is cheaper and preferable to the molded product molded from the compound.

When molding the polyolefin resin molding of the present invention, the bluing coloring composition is used as follows:
There are the following:

(1) Masterbatch or compound in which only titanium oxide pigment is dispersed in polyolefin resin and bluing pigment (cobalt borate pigment and blue inorganic pigment or cobalt borate pigment only) are dispersed in polyolefin resin. A method of obtaining a molded article by using. (2) A method of using a masterbatch or compound in which a titanium oxide pigment and a bluing pigment (cobalt borate pigment and a blue inorganic pigment or cobalt borate pigment only) are dispersed in a polyolefin resin to obtain a molded product. (3) A masterbatch or compound in which only a titanium oxide pigment is dispersed in a polyolefin resin and a part of a necessary amount of a titanium oxide pigment or a bluing pigment (cobalt borate pigment and blue inorganic pigment or cobalt borate pigment only) are used as a polyolefin. A method for obtaining a molded product by using a masterbatch or compound dispersed in a resin.

The resin composition for bluing coloring of the present invention can be used not only for extrusion molding films and laminates, but also for calendar molding, injection molding, blow molding, etc. The shape is not limited.

In the resin composition for bluing coloring of the present invention, other optional pigments, antioxidants, lubricants, UV absorbers, weathering stabilizers, and surfactants may be added within a range that does not impair the effects other than the above-mentioned components. Known additives such as a flame retardant and a nucleating agent can be added as necessary. Examples of antioxidants include phenolic antioxidants and phosphorus antioxidants. As the lubricant, a metal soap, that is, a metal salt of a higher fatty acid can be used, and calcium stearate, magnesium stearate, barium stearate, zinc stearate, aluminum stearate, lithium stearate, calcium laurate, zinc laurate. ,
Examples include magnesium laurate and the like.

[0042]

EXAMPLES The present invention will be described in detail below with reference to Examples and Comparative Examples, but the present invention is not limited thereto. The cobalt borate pigment (a) and other red pigments used are shown in Table 1, the blue inorganic pigment (b) and other blue pigments are shown in Table 2, the titanium oxide pigment (c) is shown in Table 3, and the polyolefin resin (d) is shown in Table 4. The composition of the obtained bluing coloring composition and the composition of the evaluated molded product are shown in Table 5, and the evaluation results thereof are shown in Table 6.

[0043]

[Table 1]

[0044]

[Table 2]

[0045]

[Table 3]

[0046]

[Table 4]

(Examples 1 to 12, Comparative Examples 1 to 12) Table 5
After premixing the material having the composition described in 1. with a Henschel mixer, a temperature of 1
What was kneaded at 80 ° C. and extruded in a strand form was cooled and cut to obtain a pellet-shaped master batch or compound.

Furthermore, the masterbatch was diluted with low-density polyethylene at the dilution ratios shown in Tables 5 and 6, and the compounds were used as they were, and the directions of color adjustment, heat discoloration resistance, and water resistance discoloration were obtained by the following methods. The properties, pigment dispersibility, and dye lip stainability were evaluated, and the results are shown in Table 7.

[Evaluation of directionality of color adjustment] A masterbatch or compound was prepared in the same manner as the above-mentioned method, except that the composition shown in Table 5 minus the red pigment, and the masterbatch was a low-density polyethylene. The compound was diluted with the dilution ratio described in 6, and the compound was injection-molded as it was at a molding temperature of 250 ° C. to mold a plate of 60 × 40 × 2 mm. Further, with respect to the master batch and the compound produced with the compositions shown in Table 5, plates were similarly formed. Kurashiki Spinning Aucala 7X is the color difference between the plate containing red pigment and the plate containing red pigment.
It was measured at. Further, Δa ^* / − Δb ^* was calculated from the measured color difference, and the influence of the red pigment on the blue component was evaluated. That is, the larger the value of Δa ^* / − Δb ^*, the less the influence on the blue component of the red pigment, the more efficient reddish while maintaining the bluish color, and the wider range of color adjustment. Show. ◯: Δa ^* / − Δb ^* is 0.80 or more Δ: Δa ^* / − Δb ^* is 0.60 or more and less than 0.80 ×: Δa ^* / − Δb ^* is less than 0.60

[Evaluation of heat discoloration resistance] Injection molding was carried out at a molding temperature of 320 ° C. After continuous molding, the injection molding machine was stopped and the molten material was retained in the heating cylinder for 10 minutes and then molded 60 × 40 ×. A 2 mm plate was obtained. Using these plates, a plate continuously molded at a molding temperature of 250 ° C. was used as a standard, and the heat discoloration color difference ΔE ^* value was measured. ⊚: Color difference ΔE ^* is less than 1.0 ○: Color difference ΔE ^* is 1.0 or more and less than 2.0 Δ: Color difference ΔE ^* is 2.0 or more and less than 3.0 ×: Color difference ΔE ^* is 3.0 or more

[Evaluation of Water Discoloration Resistance] The prepared master batch was extruded at a dilution ratio shown in Table 5 at a molding temperature of 250 ° C. to obtain a pelletized dilution compound. 200 g of the obtained diluted compound or the compound shown in Table 5 was placed in a glass bottle, 500 cc of distilled water was placed therein, the lid was covered, and the mixture was left in an oven at 50 ° C. for 14 days. After that, the compound is taken out and left in an oven at 80 ° C for 2 hours to remove the water adhering to the surface of the compound, and then injection molded at a molding temperature of 250 ° C to obtain 60 x 40 x 2 mm.
Got a plate of. Similarly, for the compound which was not subjected to the water resistance test, a plate was similarly formed, and the plate before the water resistance test was used as a standard, and the color difference from the plate after the water resistance test was measured. ⊚: Color difference ΔE ^* is less than 0.5 ○: Color difference ΔE ^* is 0.5 or more and less than 1.0 Δ: Color difference ΔE ^* is 1.0 or more and less than 2.0 ×: Color difference ΔE ^* is 2.0 or more

[Film spot evaluation (dispersibility evaluation)] T-die extrusion molding (extruder part made by Toyo Seiki φ30 mm, L / D35, T die lip width 10 cm) at a molding temperature of 250 ° C. and a screw rotation speed of 50 rpm, and a width of 10 cm A film with a thickness of 30 μm is molded, and using a fish eye counter manufactured by Kowa, film width 10 cm × thickness 30 μm × length 1250.
The seeds having a size of 50 μm or more in m were counted. ⊚: The number of seeds in the film 1250m is less than 50 ○: The number of seeds in the film 1250m is 50 or more 10
Less than 0 △: 100 or more pieces in 1250 m of film 1
Less than 50 x: The number of seeds in the film 1250 m is 150 or more

[Evaluation of Dye Lip Contamination] A master batch diluted compounding material or compound (20 kg) was used at a molding temperature of 3
T-die extrusion molding (manufactured by Toyo Seiki, extruding section: φ30 mm, L / D20, T-die lip width: 3 cm) was performed at 20 ° C. and a screw rotation speed of 150 rpm, and the total length of the die lip contaminants generated in the T-die lip section was measured. ⊚: Total length of the die lip contaminants is less than 3 mm ○: Total length of the die lip contaminants is 3 mm or more and 10 mm
Less than △: Total length of die lip contaminant is 10 mm or more and 20 m
Less than m ×: Total length of die lip contaminant is 20 mm or more

[0054]

[Table 5]

[0055]

[Table 6]

[0056]

EFFECT OF THE INVENTION The polyolefin resin molded product using the resin composition for bluing coloring of the present invention has a wide range of color adjustment in bluing and is excellent in heat discoloration resistance, water discoloration resistance, pigment dispersibility, and dye lip stain resistance. Therefore, it has become possible to provide a stable bluing polyolefin resin molded product in any molding including a thin film molded product by high temperature processing.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C08K 3/38 C08K 3/38 C08L 101/00 C08L 101/00 G03C 1/79 G03C 1/79 F term ( Reference) 2H023 FA04 4F070 AA12 AA13 AC13 AC14 AC18 AE04 FA01 FA03 FC02 FC05 4F071 AA14 AA18 AB18 AB27 AE09 AF01 AF45 AF55 BA01 BB05 BB06 BC01 BC03 4J002 AA00X BB030 BB0315 BB03W BB08W0W07WBBW15BB07W BB08W0W07BBBBW15BB07WBBW15BBW15BBBBW

Claims (5)

[Claims] 1. A resin composition for bluing coloring, comprising an inorganic pigment and a polyolefin resin (d), wherein the inorganic pigment comprises 100 parts by weight of a cobalt borate fired body and 5 to 25 parts by weight of a metal carbonate. The heat-treated cobalt borate pigment (a) is contained, the weight average particle diameter of the cobalt borate pigment (a) is 0.3 to 8.0 μm, and the concentration of the cobalt borate pigment (a) is the above. A resin composition for bluing coloring, which is 0.001 to 70% by weight based on the entire resin composition. 2. Further, titanium oxide (c) is added as an inorganic pigment in an amount of 0.001 to 70 relative to the entire resin composition.
The resin composition for coloring bluing according to claim 1, wherein the resin composition comprises 100% by weight. 3. An inorganic pigment is a blue inorganic pigment (b).
The resin composition for bluing coloring according to claim 1 or 2, which comprises: 4. A resin molded product comprising the bluing coloring resin composition according to claim 1. 5. A photographic printing material obtained by molding the molded product according to claim 4 on a support.