IT1064906B - High m.w. soluble poly(halogenoaryloxy phosphazenes) prepn - which give hydrolysis and flame resistant prods
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High m.w. soluble poly(halogenoaryloxy phosphazenes) prepn - which give hydrolysis and flame resistant prods
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IT1064906B
IT1064906BIT2489974AIT2489974AIT1064906BIT 1064906 BIT1064906 BIT 1064906BIT 2489974 AIT2489974 AIT 2489974AIT 2489974 AIT2489974 AIT 2489974AIT 1064906 BIT1064906 BIT 1064906B
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Polymers With Sulfur, Phosphorus Or Metals In The Main Chain
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Abstract
Novel process for preparing polymers of formula (I) (where n is 20-50,000, R1, R2 and R3 are H, Cl, Br or 1-5C alkyl, >=1 being halogen) comprises reacting a stoichiometric excess of the appropriate phenol with poly(dichlorophosphazene) at 115-160 degrees C for 5-100 hrs. Specif. (I) are (4-Cl(or Br) C6H4O)2-PN n, (3-CH3-4-XC6H3O)2PN n and (4-X-3,5-(CH3)2C6H4O)2PN n, (where n is 20-50,000 and X is Cl or Br). The products are free of P-Cl sites and are therefore hydrolysis resistant. They are also soluble and fire resistant and are used as insulators, construction materials, carpet backings, protective clothing etc.
IT2489974A1974-07-081974-07-08High m.w. soluble poly(halogenoaryloxy phosphazenes) prepn - which give hydrolysis and flame resistant prods
IT1064906B
(en)