Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1976-10-15
1978-11-21
Lee, Lester L.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
260DIG24, 528191, C08G 6366, C08G 6368
Patent
active
041266463
ABSTRACT:
A thermostable flameproofing agent for copolyesters is prepared by reacting ne mol of a diester of an alkali dicarboxyaryl sulphonate with 1-2 mols of at least one tetrabrominated diol in the presence of a transesterification catalyst chosen in the group consisting of compounds of Zn, Co, Ca, Sn, Ti and Mn. Copolyester compositions adapted for the preparation of formed bodies are prepared by the polycondensation of a dicarboxylic arylic acid or its diesters and a saturated aliphatic diol with said flameproofing agent and up to 1% by weight of a derivative of phosphorus in the presence of a catalyst consisting of Sb.sub.2 O.sub.3 or GeO.sub.2. Said compositions preferably have an intrinsic viscosity not less than 0.40 dl/g before their transformation into formed bodies and not less than 0.35 dl/g after said transformation.
REFERENCES:
patent: 3234167 (1966-02-01), Sweeny
patent: 3624034 (1971-11-01), Price et al.
patent: 3663508 (1972-05-01), Mobius et al.
patent: 3704279 (1972-11-01), Ismail
patent: 3794617 (1974-02-01), Mains et al.
patent: 3867336 (1975-02-01), Fox
Ciaperoni Aldemaro
Dall'Asta Gino
Quaglia Giuseppe
Lee Lester L.
SNIA VISCOSA Societa Nazionale Industria Applicazioni Viscosa S.
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