Raw Materials for Drywall and Gypsum Putty

With excellent dispersing and wetting properties, naphthalene sulfonates have been a workhorse of the building chemistry industry. Bisley exclusively market the BISPLAS range of naphthalene sulfonates, available as both a calcium and sodium salt, with a variety of sulfate grades available. Formaldehyde free grades are also available.

The perfect choice when flow and pumpability are of high importance. Melamine Sulfonate works extremely well with gypsum systems, offering faster set times. Bisley distributes the Plastyn SP range in both liquid and powder form.

Bisley exclusively markets and distributes the BislfowTM Ultra range of PCE for the gypsum industry. BisflowTM Ultra is a high range superplasticizer with low dose efficiency, optionally available with an added defoamer for easy formulation.

Synthetic L+ and DL tartaric acid are available as a free flowing powder (with anti-cake) and in granular form. Tartaric acid is an extremely effective retarder (especially for alumina cement systems) at very low dosages.

Plaster mixtures containing STMP can improve compressive strengths of the boards as well as mechanical stability. STMP has been shown to have an excellent effect on reducing sag deflection. STMP does not have the effect of retarding the setting, meaning it does not increase the re-conversion rate of calcined plaster into calcium sulfate dihydrate.

Modified starch acts as a binder between the facers and the core and between the gypsum crystals (i.e. a co- binder). Modified starches are also effective thixotropic agents suitable for use in gypsum putties.

Potassium sulfate is a highly soluble accelerator in gypsum systems.

Bisley carries a range of powder additives for air-entrainment and foam generation. Foaming agents can play a major role in reducing the density of the drywall (gypsum board), which allows for ease of handling, thermal insulation, sound proofing, shorter drying times and savings in raw material costs.

Extremaspheres^TM are expanded foam glass spheres ideally suited for light colour and light weight renders, mortars and concrete. Extremaspheres^TM are a lightweight aggregate made from recycled glass, chemically resistant, low in density, resistant to pressure and act as a thermal insulation, acoustic absorption. Highly suited for use in insulation, fireproof renders and cement board.

Microspheres, also known as cenospheres, are thin walled hollow ceramic spheres that can be used to modify rheology, reduce weight and shrinkage and improve thermal insulation. With high crush strength, suitable for all light weight mortar and render applications.

Bisley carries a range of powder defoamers including silicone, organic and fatty acid. These are specifically optimized for cementitious and gypsum systems.

Cellulose ethers extend the open time / workability of mortars and glues. With extremely low addition rates, cellulose ethers can modify the flow properties of the cement mortar water retention, making water available to the slurry over time. Bisley supplies a full range of MCs, HECs and HPMCs.

Ethylene Vinyl Acetate (EVA) based dispersible polymer powders are easily dispersed in water and form stable emulsions. RDPs can improve adhesion, flexural strength and workability of modified compounds.