C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/3015
C08L 67/02 (2006.01) C08L 71/00 (2006.01)
Patent
CA 1126430
ABSTRACT OF THE DISCLOSURE Fiber-reinforced polyethylene terephthalate molding compositions containing (A) about 20 to about 80% by weight of polyethylene terephthalate; (B) about 5 to about 50% by weight of a reinforcing fiber; and (C) about 6 to about 60% by weight of a copolyether- ester consisting essentially of (a) long-chain ester units having the formula: Image wherein G is the divalent radical remaining after removal of the terminal hydroxyl groups from a poly(alkylene oxide) glycol having a number-average molecular weight of about 400 to about 6000; and R is the divalent radical remaining after removal of the carboxyl groups from a dicarboxylic acid; and (b) short-chain ester units having the formula: Image wherein D is the divalent radical remaining after removal of the hydroxyl groups from a low molecular weight diol having a molecular weight of less than about 250; and R is as defined above, with the proviso that the short-chain ester units constitute about 40 to about 90% by weight of the polyether-ester, and the long-chain ester units constitute about 10 to about 60% by weight of the copolyether-ester provide injection molded articles having improved surface smoothness.
323909
Wu Souheng
E.i. Du Pont de Nemours And Company
Mccallum Brooks & Co.
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