AKTISIL MAM

SILRES® BS 168 is a silicone-based, water-soluble pH adjuster designed for use in waterborne emulsion paints. Here’s a detailed overview of what it is and its properties:

Product Overview:

• Brand: SILRES®
• Product Name: BS 168
• Type: Methylsiliconates
• Form: Water-based, solvent-free

Key Properties:

• Appearance: Clear to hazy, colorless liquid.
• Density: 1.4 g/cm³ at 25°C and 1013 hPa.
• Solids Content: 55 wt.% at 150°C for 1 hour.
• pH: 13 - 14 at 25°C (using indicator strips).
• Solvent: Water.

Benefits and Performance:

1. Storage Stability: Provides excellent stability in formulated paints.
2. pH Stability: Maintains pH stability, which is crucial for the longevity and performance of the paint.
3. Mechanical Resistance: Improves the mechanical resistance of the paint.
4. Water Resistance: Enhances the water resistance of the paint formulation.
5. Low VOC and Odor: Suitable for formulating low VOC (Volatile Organic Compounds) and low odor paints.

Applications:

• Auxiliary: Used as a pH adjuster in waterborne emulsion paints.
• Surface Treatment: Enhances paint performance by stabilizing pH, which contributes to better overall quality of the paint.

Application Details:

• Dilution: It is recommended to dilute SILRES® BS 168 with water before adding it to a formulation. A typical dilution ratio is 1 part SILRES® BS 168 to 3 parts water.
• Addition: Add the diluted product to the paint formulation while stirring to ensure even distribution and to avoid local high pH values.
• Dosage: The dosage should be adjusted based on the paint formulation and the desired pH level (e.g., 9.5 for standard paints). The optimal amount should be determined experimentally.

Packaging and Storage:

• Best Use Before: The product label will indicate the "Best use before" date. While storage beyond this date does not automatically render the product unusable, it's essential to verify the properties for quality assurance.

Portafill® G2 appears to be a specific grade within the Portafill® G series, which is a line of products characterized as iron-free, milled, amorphous calcium-aluminum silicates. Here's a breakdown based on the information provided:

Composition and Quality

• Material Type: Amorphous calcium-aluminum silicate, which means it lacks a clearly defined shape or form (non-crystalline).
• Quality Control: The product's consistency and quality are maintained under an ISO 9001 certified quality management system. This certification ensures that the product meets specific standards of quality in its production and supply.
• Purity: Notably free of iron and crystalline silica, which is crucial for applications requiring high purity and specific chemical properties.

Physical Properties

• Particle Size: Available in various grades (G25, G45, G75) with different mean particle sizes. For instance, G25 has a median diameter (D50) of 12 µm, indicating that 50% of the particles are below 12 µm.
• Oil Absorption: Relatively low, which can influence how it interacts with different mediums in paint or sealant formulations.
• Color: Exhibits a high lightness value (L* = 93), suggesting it is very light in color, beneficial for maintaining color integrity in applications.
• Moisture Content: Very low moisture content, which is good for stability and storage.
• pH: Neutral, which means it won't significantly alter the pH of mixtures it's added to.
• Density and Bulk Density: Fairly light with consistent density across different particle sizes, affecting its application in terms of volume and weight considerations.
• Hardness: A Mohs' scale hardness of 6 indicates it's relatively hard, useful for applications needing abrasive resistance.
• Refractive Index: At 1.55, which might be relevant in applications where light refraction is considered.

Chemical Analysis

• Main Components: Predominantly SiO2 (silicon dioxide) and CaO (calcium oxide), with a significant amount of Al2O3 (aluminum oxide). This composition contributes to its inertness and stability.
• Trace Elements: Very low in Fe2O3 (iron oxide), which confirms its iron-free claim, crucial for applications where iron content could be detrimental.

Applications

• Paints and Sealants: Its transparency, chemical inertness, and abrasive resistance make it ideal for these applications. The lack of crystalline silica also means lower health risks in applications producing dust.
• Composites: Used for enhancing dimensional stability and electrical properties, likely due to its particle size distribution and chemical composition.

Environmental Impact

• Sustainability: The mention of contributing to sustainable chemistry suggests that Portafill® G2 might be sourced or processed in an environmentally friendly manner, though specifics aren't provided.

In summary, Portafill® G2 and its variants are specialized fillers used in industries where the specific properties of particle size, chemical inertness, and physical stability are paramount. Its characteristics make it particularly valuable in high-end applications where material transparency, resistance to chemicals, and electrical properties are crucial.