Background
Our product range for matting silicas is growing and new products have been introduced to the portfolio.
Matt XP is now the name of the product range. Customers who previously purchased “Matt XP” will be asked to purchase it under the new name of Matt XP GAW-18-VF..
Our product range for matting silicas is growing and new products have been introduced to the portfolio.
Matt XP is now the name of the product range. Customers who previously purchased “Matt XP” will be asked to purchase it under the new name of Matt XP GAW-18-VF..
Overview of Grades
The product range now includes both precipitated and gel type silicas in a range of particle and pore sizes.
Neutral pH grades have also been added to the range to enhance our offering for Aqueous systems.
The product range now includes both precipitated and gel type silicas in a range of particle and pore sizes.
Neutral pH grades have also been added to the range to enhance our offering for Aqueous systems.
Nomenclature
Example
GAW-18-VF is Gel type Acidic
FT wax coated
1.8 L/g pore volume
6-7μm particle range
General Influence on Properties
Type of Silica Precipitated silicas have greater gloss reduction properties but are softer particles which are easier to over disperse when compared to Gel types.
pH For aqueous systems, neutral types are preferred, but acidic types can still be used if they are properly neutralized.
Coating Type Uncoated types have greater gloss reduction properties but suffer most from poor flow and burnishing. Coated types improve burnish resistance and transparency. Refinery wax coatings should not be exposed to aromatic solvents.
Pore Volume Greater pore volume particles have greater gloss reduction properties but larger oil absorption – so can affect coating rheology.
Particle Size In general, larger particles have a bigger effect on light scattering. However, the number of particles per unit weight (and therefore the total surface area) increases exponentially with reduction in particle size. Film thickness and application method may be the critical deciding factors. Very low particle sizes have different haptic “feel” to the coating.
GAW-18-VF is Gel type Acidic
FT wax coated
1.8 L/g pore volume
6-7μm particle range
General Influence on Properties
Type of Silica Precipitated silicas have greater gloss reduction properties but are softer particles which are easier to over disperse when compared to Gel types.
pH For aqueous systems, neutral types are preferred, but acidic types can still be used if they are properly neutralized.
Coating Type Uncoated types have greater gloss reduction properties but suffer most from poor flow and burnishing. Coated types improve burnish resistance and transparency. Refinery wax coatings should not be exposed to aromatic solvents.
Pore Volume Greater pore volume particles have greater gloss reduction properties but larger oil absorption – so can affect coating rheology.
Particle Size In general, larger particles have a bigger effect on light scattering. However, the number of particles per unit weight (and therefore the total surface area) increases exponentially with reduction in particle size. Film thickness and application method may be the critical deciding factors. Very low particle sizes have different haptic “feel” to the coating.
Gel Grades
Precipitated Grades
Download our Matt XP - Matting Silica Range Brochure
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