| 摘要 |
A fireproof polymeric composition contains a) between 20 and 60 % by weight of thermoplastic and/or cross-linked or being cross-linked and/or elastomeric polymer and b) between 40 and 80 % by weight of fire-protective agent, representing aluminium hydroxide which is characterized by defined values of specific surface, mean diameter, residual humidity, oil absorption and water-absorbing capacity. A method for the preparation of fireproof agent is performed in such a way that aluminium hydroxide obtained by precipitation and filtration being represented in the form of filtered cake, containing moisture and which mean particles diameter is between 0.8 and 1.5 mum, is subjected to grinding in the turbulent flow of hot air with a simultaneous drying in the mode in which the specific surface of this aluminium hydroxide being determined by BET-method, is increased at least by 20% at practically grain-size composition thereof being practically unchanged. |
