Polyoxymethylene fibrids, a process for their preparation,...

Details Polyoxymethylene fibrids, a process for their preparation,... Polyoxymethylene fibrids, a process for their preparation,...

D - Textiles, Paper

01

F

18/507, 9/51

D01F 6/58 (2006.01) C04B 16/06 (2006.01) D01D 5/06 (2006.01) D01D 5/26 (2006.01) D01F 6/66 (2006.01)

Patent

CA 1178757

Abstract of the disclosure: The invention relates to polyoxymethylene fibrids having a reduced specific viscosity of 0.5 to 2.0 dl/g-1 and a specific surface area of 30 to 200 m2/g, which are comprised of at least 95% of fiber-like particles the mean length of which is between 0.2 and 5 mm and have a bulk density which does not exceed 150 g/liter. According to the invention, the fibrids are pre- pared by forcing a solution of polyoxymethylene in a solvent mixture of lower alcohols and water through a nozzle into a moving precipitation bath, the solvent mixture being comprised of a mixture of lower alcohol and 3-25% by weight of water and the temperature of the precipitation bath being 0 to 100°C. The fibrids thus obtained are suitable for preparing paper and as an addi- tive for building materials.

415335

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