PIGMENT BLUE 15:3/ HP BLUE 43145

What Is PB15:3 / HP BLUE 43145

CAS 147-14-8, CI 74160, a beta crystal form copper phthalocyanine blue. This specific grade is positioned for plastics applications, offering a greenish-blue shade with outstanding heat stability and lightfastness (Blue Wool 8). It delivers high tinting strength and resistance to crystal growth, making it a top choice for demanding polymer systems where color consistency and durability are critical.

Why Choose HP BLUE 43145

Choose HP BLUE 43145 when your plastics application requires the highest thermal stability and consistent color strength during processing. Unlike its sibling HP BLUE 4452 (bright color) or HP BLUE 4559 (low viscosity, good dispersibility), this grade is optimized for plastics, providing excellent compatibility with polymer melts and resistance to warpage at high temperatures. It outperforms alpha forms by resisting flocculation and crystal growth, ensuring uniform color in molded parts, films, and fibers. Pick HP BLUE 43145 when you need a reliable, heat-stable greenish-blue pigment that maintains its shade under repeated processing or in end-use environments with high UV exposure. It fills the gap between pure color brightness and industrial durability, ideal for masterbatches and engineering plastics.

Key Features

• Beta crystal form ensures maximum stability against crystal growth during high-temperature plastics processing, preventing color shift.
• Excellent heat resistance allows incorporation into polymers processed above 250°C (e.g., polycarbonate, ABS) without degradation.
• High tinting strength reduces pigment load, maintaining mechanical properties and cost efficiency in plastics formulations.
• Superior lightfastness (Blue Wool 8) guarantees long-term color retention in outdoor plastic applications, such as automotive or construction parts.
• Chemical stability resists attack by acids, bases, and solvents commonly encountered in plastic molding and end-use environments.

C.I.NO.: PB15:3

Advantage:

Main Application Recommended: Plastics

Product Description – PB15:3

HP BLUE 43145 (PIGMENT BLUE 15:3) is a phthalo pigments with greenish shade. It has outstanding properties for light fastness, weather fastness and acid alkali fastness. It is mainly used in plastics/ Masterbatch indsutries.

Recommended Application：

Plastics: PP, PE, PVC, PS/SAN, ABS, PC, POM, PA, PET, PBT, PMMA, Rubber/TPV, SBC, TPO, TPU

Technical Data:

• Light fastness: Light fastness rating is assessed on 1 to 8 Blue Wool scale where 1 = ‘Poor’ and 8 = ‘Excellent’.
• Heat Stability : Heat stability values given indicate the maximum temperature at which the pigment can be stoved for 10 min. on the full shade and in reductions without undergoing any significant change in shade.
• Oil absorption: The oil absorption is determined on the basis of EN ISO 787-5 and given in g linseed oil per 100 gm. pigment.
• Solvent bleeding: The bleeding in solvents is tested using the powder grades and the visual rating given on 1 to 5 Grey scale
  where 1 = ‘Heavy bleeding’ and 5 = ‘No bleeding”

Technical Note — The data and recommendations provided are based on HONOR Pigment’s internal testing and manufacturing experience. They are offered in good faith to assist customers in evaluating product suitability for their specific applications. As processing conditions, formulations, and end-use requirements vary widely, customers should conduct their own validation under actual use conditions. HONOR Pigment makes no warranties, express or implied, regarding the accuracy of this information or its fitness for any particular purpose. Nothing herein shall be construed as a license or recommendation to infringe any patent. HONOR Pigment’s standard terms and conditions of sale apply.oduct contains particles < 0.1 μm. Any user of this product is responsible for determining the suitability of Honor Pigments’s products for its particular application & to ensure that any proprietary rights & existing laws & legislation are observed.

Frequently Asked Questions About PB15:3

Why is PB15:3 specifically recommended for plastic applications rather than other phthalo blues?

PB15:3 (beta crystal form) is the standard choice for plastics because it exhibits superior heat stability up to 280-300°C, resisting color shift during injection molding or extrusion. Unlike the alpha form (PB15:1 or PB15:2), PB15:3 does not undergo crystal transformation at typical processing temperatures, which prevents dulling or reddening. Additionally, HP BLUE 43145 is surface-treated for low moisture absorption and minimal plate-out in polyolefins, ABS, and PVC. Its intense blue shade with a slight greenish undertone enhances opacity at low loadings (0.1-0.5%) without warping. HP BLUE 43145 takeaway: It is the thermally robust, crystal-stable phthalo blue engineered for high-temperature plastic molding, not for inks or coatings.

What are the performance limits of HP BLUE 43145 in terms of lightfastness and chemical resistance?

HP BLUE 43145 offers excellent lightfastness (7-8 on the blue wool scale) in full-shade formulations, but at high translucency or below 0.05% loading, fading may accelerate in outdoor exposure. It has outstanding resistance to weak acids, alkalis, and most organic solvents, but it will degrade in strong oxidizing agents (e.g., concentrated nitric acid) and may bloom in flexible PVC if plasticizer levels exceed 40%. Impact strength and warp are not affected below 2% loading. For food contact, check local regulations as surface treatments vary by lot. HP BLUE 43145 takeaway: Reliable for indoor and semi-outdoor use, but avoid severe chemical exposure and minimal loadings for maximum durability.

How does HP BLUE 43145 compare to other phthalo blue grades like PB15:1 or PB15:4?

PB15:1 is the alpha crystal form with a redder shade and higher solvent stability, but it has lower heat resistance (max 240°C) and can turn greenish if overheated. PB15:4 is another beta form with enhanced dispersibility for ink systems, but its grain size is finer, leading to higher dusting risk and bleed in nylons. HP BLUE 43145 bridges these gaps: it combines the beta crystal’s heat stability with a controlled particle size (0.1-0.3 μm) that balances color strength and ease of dispersion in polyolefins without requiring elaborate pre-dispersion. It costs less than PB15:1 due to simpler synthesis. HP BLUE 43145 takeaway: Your cost-effective beta-blue for plastics where high heat stability and moderate red-shade are required, outperforming PB15:1 in thermal processing.

What special processing or dispersion techniques are needed for HP BLUE 43145 in plastics?

HP BLUE 43145 is supplied as a fine powder with a particle size of 0.1-0.3 μm, which tends to agglomerate if added directly to single-screw extruders. For masterbatch production, we recommend premixing with a compatible dispersant (e.g., EVA wax for PE, or stearate for PVC) at 5-10% of the pigment weight and using a high-speed mixer for 5 minutes. In twin-screw extrusion, side-feeding is preferred to avoid screw slippage. For rigid PVC or ABS, use a two-roll mill at 160-180°C to ensure de-agglomeration. Never exceed 300°C residence time of 10 minutes, or color shift may occur. HP BLUE 43145 takeaway: Requires shear-intensive dispersion or carrier wax; direct feed to single-screw extruders may yield specks without pre-compounding.

How should HP BLUE 43145 be stored, and can it be substituted by other blues on short notice?

Store in a dry environment (<60% RH) below 40°C, sealed from light, to prevent caking or moisture pickup (which can cause vent flooding in extrusion). Shelf life is typically 24 months. As a substitute, you can use PB15:3 from other CI 74160 suppliers (e.g., BASF Heliogen Blue K7090 or Clariant Hostaperm Blue B2G) but verify the surface treatment and heat stability curve—HP BLUE 43145 is formulated for 280°C tolerance, while some alternatives drop to 260°C. Do not substitute with PB15:1 or PB15:4 without re-qualifying color strength and warping. If stock is low, consider Cu-phthalocyanine beta masterbatch (e.g., 40% pigment load) for immediate use. HP BLUE 43145 takeaway: Keep cool and dry; substitution is feasible only with certified PB15:3 equivalents, not other crystal forms.

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