Self-extinguishing and thermostable copolyesters and process...

Details Self-extinguishing and thermostable copolyesters and process... Self-extinguishing and thermostable copolyesters and process...

C - Chemistry, Metallurgy

08

G

402/187

C08G 63/68 (2006.01) C08G 79/02 (2006.01) D01F 6/84 (2006.01)

Patent

CA 1111187

ABSTRACT OF THE DISCLOSURE: Self-extinquishing and thermostable copolyester compositions are obtained by polycondensing, in the presence of a polycondensation catalyst, the following components: A) a compound selected from the group consisting of dicarboxylic arylic acids and their methyl diesters; B) a saturated aliphatic diol; C) a tetrabrominated diol having the formula: Image wherein a and b are, independently of one another, 1 or 2; D) a sulphonated compound having the formula: Image wherein the radicals R' represent hydrogen atoms, alkyl radicals containing from 1 to 3 carbon atoms, or hydroxyalkyl radicals containing 2 or 3 carbon atoms, and M is an alkali metal atom; and E) up to 1% by weight of a phosphorus derivative selected from the group consisting of organic and inorganic derivatives of trivalent or pentavalent phosphorus, as complexing and stabilizing agent. The copolyester compositions of the invention are suitable for the production of flame-resistant formed bodies, in particular textile fibres. I

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