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Exceptional lightfastness and weather resistance, specifically engineered for demanding outdoor applications.
High thermal stability up to 250 °C, enabling safe incorporation into high-temperature polymer processing.
Optimized particle size distribution for superior dispersion and consistent color development in diverse matrices.
Low sulfate content and controlled pH, ensuring compatibility with sensitive resin systems and minimal risk of blooming.
AR-grade (Acid Resistant) formulation providing enhanced stability in acidic environments and low-pH coatings.
Architectural coatings exposed to UV radiation and climatic stress.
Automotive exterior plastics requiring long-term color retention.
Industrial powder coatings where thermal stability and acid resistance are critical.
Polyolefin masterbatches for outdoor furniture and construction profiles.
High-performance concrete colorants for façade elements and precast architectural panels.
| Chemical Type | Sodium aluminosilicate sulfide (synthetic ultramarine) |
| Product Form | Fine free-flowing powder |
| Appearance | Brilliant blue to violet-blue shade, uniform granular texture |
| Primary Applications | Coatings, plastics, construction materials, specialty inks |
| Key Features | Acid resistant (AR), thermally stable, lightfast, low sulfate |
| Typical Bulk Density | 0.8–1.0 g/cm³ |
| pH (5% aqueous suspension) | 6.5–7.5 |
| Max. Moisture Content | ≤1.5% (w/w) |
Q1: What does “AR” stand for in Nubiperf AR, and how does it affect performance?
A: “AR” denotes Acid Resistance — a key formulation enhancement that improves stability of the ultramarine pigment in mildly acidic environments, such as certain water-based coatings, architectural plasters, and low-pH cosmetic formulations. It does not confer resistance to strong mineral acids but significantly extends compatibility compared to standard ultramarine grades.
Q2: Is Nubiperf AR suitable for use in food-contact plastics or packaging inks?
A: Nubiperf AR is not intended for direct food-contact applications. While it complies with general pigment purity requirements for industrial use, it has not been evaluated or certified against food-contact regulations (e.g., FDA 21 CFR or EU Framework Regulation (EC) No 1935/2004). For such applications, consult Nubiola’s dedicated food-grade pigment portfolio and obtain formal regulatory documentation prior to use.
Q3: How does Nubiperf AR compare to conventional ultramarines in terms of thermal stability?
A: Nubiperf AR retains the inherent thermal sensitivity common to all ultramarine pigments — it begins to undergo visible color shift above approximately 180–200 °C. Its optimized particle structure and surface treatment do not substantially increase maximum service temperature, so it remains unsuitable for high-heat polymer processing (e.g., engineering thermoplastics) or ceramic firing. Use is recommended in low-to-moderate temperature applications such as interior paints, artist materials, and PVC calendering.
Q4: Can Nubiperf AR be dispersed in water without surfactants or dispersing aids?
A: While Nubiperf AR exhibits improved wetting behavior over non-treated ultramarines due to its tailored surface chemistry, stable aqueous dispersion typically requires mild anionic or nonionic dispersants — especially at higher pigment loadings or when long-term storage stability is required. Pre-wetting with glycols or low-VOC co-solvents may also assist in achieving uniform distribution.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
