Poly(ester-carbonate)s, articles formed therefrom, and methods of manufacture

    公开(公告)号:US10899877B2

    公开(公告)日:2021-01-26

    申请号:US16095755

    申请日:2017-04-28

    Abstract: A poly(carbonate-ester) copolymer including carbonate units of the formula (I); and ester units of the formula (II) wherein: T is a C2-20 alkylene, a C6-20 cycloalkylene, or a C6-20 arylene; and R1 and J are each independently a bisphenol A divalent group, or a phthalimidine divalent group or a third divalent group of the formula (III), (IV), (V), (VI) or (VII) wherein Xa is a C6-12 polycyclic aryl, C3-18 mono- or polycycloalkylene, C3-18 mono- or polycycloalkylidene, -(Q1)x-G-(Q2)y- group wherein Q1 and Q2 are each independently a C1-3 alkylene, G is a C3-10 cycloalkylene, x is 0 or 1, and y is 1, provided that the at least one bisphenol A divalent group, at least one phthalimidine divalent group, and at least one third divalent group are present in the poly(carbonate-ester) copolymer.

    Abusively molded article including color stable components

    公开(公告)号:US10808100B2

    公开(公告)日:2020-10-20

    申请号:US16061473

    申请日:2016-12-12

    Abstract: A molded article includes a polycarbonate resin, an ultraviolet (UV) absorbing component, a heat stabilizer component, and a colorant. The molded article, when tested using a 2.5 mm color plaque, includes a color difference delta E* (dE*) of less than about 0.6 following molding under abusive molding conditions as compared to a reference article molded under standard processing conditions. The molded article may include a color difference delta b* (db*) of less than about 0.3 after being molded under the abusive molding conditions as compared to a reference article molded under standard processing conditions. The UV absorbing component may include a benzotriazole compound. Methods for forming a molded article in accordance with the above are also described.

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