| abstract |
New phosphorus compounds are provided which correspond to the formula R1 - OO ANGLE P ANGLE R2 - O (X)n-1 A , wherein R1 and R2 each denote alkyl with 1 to 6 carbon atoms, X denotes alkylene with 1 to 4 carbon atoms and A denotes phenyl substituted by hydroxyl, alkoxy with 1 to 4 carbon atoms, alkoxy carbonyl with 2 to 5 carbon atoms, phenyl or halogen and n is 1 or 2. These compounds are useful as flameproofing agents for organic fiber material, especially for polyamide, polyacrylonitrile or linear polyester fibers, when applied according to the dry thermal transfer process. |