Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1977-02-14
1977-10-04
Person, Sandra M.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260857PE, 260860, C08G 336, C08K 322
Patent
active
040523608
ABSTRACT:
There is disclosed a process for preparing reinforced flame retardant copolyester molding compositions having non-drip characteristics. This process comprises intimately mixing a reinforcing agent, a Group Vb metal-containing compound, and the molten reaction product of a copolyester and a polycarbodiimide. The copolyester comprises the reaction product of (a) an alkane diol (as defined), (b) terephthalic acid, isophthalic acid or a dialkyl ester thereof, and (c) a halogenated derivative of the bishydroxyethylether of p,p'-isopropylidenediphenol. The polycarbodiimide must both (a) be derived from at least one aromatic diisocyanate which is either unsubstituted or contains up to one methyl substituent on each aromatic ring, and (b) contains at least three carbodiimide units per polycarbodiimide molecule.
The reinforced flame retardant copolyester molding resin composition prepared by this process may be readily molded to form three-dimensional shaped articles having satisfactory mechanical properties using conventional molding techniques.
REFERENCES:
patent: 3193522 (1965-07-01), Neumann et al.
Berardinelli Frank M.
Edelman Robert
Celanese Corporation
Person Sandra M.
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