Method of preparing a gypsum-based product
A method of preparing a gypsum-based product comprises the steps of mixing calcined gypsum with polymer particles and water to provide a slurry. The polymer particles comprise principally polyvinyl acetate, and have a particle size distribution, measured using laser diffractometry, such that particl...
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| Zusammenfassung: | A method of preparing a gypsum-based product comprises the steps of mixing calcined gypsum with polymer particles and water to provide a slurry. The polymer particles comprise principally polyvinyl acetate, and have a particle size distribution, measured using laser diffractometry, such that particles having a diameter of 4.5 µm or less provide at least 90% of the total particle volume. The polymer particles may also include polyvinyl alcohol and are produced in the form of water-based emulsions. Fibres such as glass fibres may be incorporated in to the slurry and a liner such as paper or a glass fibre mat may be provided on at least one face of the produced board. |
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