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LEARN / MATERIAL FUNCTION

Filler / extender

Explore existing library materials with a source-linked filler / extender assignment.

These assignments describe a documented material function. The individual source may concern a particular supplier grade or application. Open a material’s evidence before using it in a formula.

Materials with this function

21 source-linked library assignments. Matching a function does not establish compatibility, safety or a greener replacement.

Aluminum hydroxide

CAS 21645-51-2

Recorded function: Flame-retardant mineral filler and reinforcing pigment

Aluminum hydroxide, also called alumina trihydrate (ATH), is used as a mineral flame retardant and smoke suppressant. Huber’s Hydral sheet also identifies uses in paper filling/coating, adhesive reinforcement and mild polishing applications. [Huber TDS]

Aluminum oxide

CAS 1344-28-1

Recorded function: Abrasive and mineral filler for industrial formulation development

Aluminum oxide (alumina) is used as an abrasive and in ceramic/refractory materials. The selected Wako product is explicitly for grinding. Almatis documents specialized aluminas for refractories, ceramics and polishing, illustrating the importance of product form. [Wako product page; Almatis]

Barium sulfate

CAS 7727-43-7

Recorded function: Mineral extender and functional filler for coatings and polymers

Barium sulfate is a dense inorganic pigment/extender and functional filler. TOR’s BARTEX material information identifies applications in paints, coatings, inks, adhesives, plastics, ceramics and rubber. Natural barite and chemically precipitated blanc fixe are distinct commercial forms.

Boehmite

CAS 1318-23-6

Recorded function: Functional mineral filler for polymers and separator coatings

Mineral filler and co-flame retardant; coating particles for lithium-ion battery separators and electrode edges. Specific Nabaltec grades promote char formation and tolerate high processing temperatures.

Boron nitride

CAS 10043-11-5

Recorded function: Hexagonal boron-nitride powder for lubrication and thermal-management formulations

Hexagonal boron nitride is used as a lubricating powder, thermal-management filler and ceramic ingredient. Its platelet structure differs from hard cubic boron nitride.

Calcium silicate

CAS 1344-95-2

Recorded function: Functional filler and corrosion-inhibiting pigment for primers

Calcium silicate covers commercially variable calcium salts of silicic acid. The archived Qemetica grade is calcium-modified silica used as an industrial additive. Its INHIBISIL 73 and 75 pigments are designed for corrosion protection in waterborne and solvent-borne primers. Other qualified grades can serve anti-caking uses, but the industrial grade here is not a food or pharmaceutical authorization. [Qemetica SDS; Qemetica brochure; JECFA]

Calcium sulfate anhydrous

CAS 7778-18-9

Recorded function: Anhydrous mineral filler and chemical-processing reagent

Anhydrous calcium sulfate is used as a desiccant. Regular DRIERITE is a commercial anhydrous calcium sulfate grade that removes moisture; Thermo provides a separate laboratory reagent grade. Calcium sulfate also has specified food-technology uses, but such uses require an appropriate compliant grade and cannot be inferred for the archived reagent.

Calcium sulfate dihydrate

CAS 13397-24-5

Recorded function: Gypsum mineral for fillers, binders and construction formulation development

Gypsum is calcium sulfate dihydrate, used in cement and as feedstock for plaster, as an industrial filler and as a calcium/sulfur source in soil-treatment products. Di-Corp also describes gypsum as a calcium source for selected drilling-fluid systems. Plaster of Paris is the hemihydrate, not the same hydration state as the selected gypsum.

Dolomite

CAS 16389-88-1

Recorded function: Carbonate mineral and liming-material reference

Calcium-magnesium carbonate mineral used in liming and as a raw material or filler. Nordkalk dolomite flour reduces soil acidity and supplies magnesium; this agricultural function depends on soil need and grade. [Nordkalk product information]

Engineered talc

CAS See supplier composition

Recorded function: Mineral reinforcement / filler

A specialty talc family named in Imerys’ November 2023 announcement on mineral additives for automotive polymers. Exact grade properties and current regional availability require supplier confirmation.

Engineered talc

CAS See supplier composition

Recorded function: Mineral reinforcement / filler

A specialty talc family named in Imerys’ November 2023 announcement on mineral additives for automotive polymers. Exact grade properties and current regional availability require supplier confirmation.

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