US 2025/0163265 A1Published application

Transparent polycarbonate compositions

AssigneeShpp Global Technologies B.V.

InventorsWei Zhao, Laura Mely Ramirez, Hao Zhou, Peter Hendrikus Theodorus Vollenberg

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Abstract

A polycarbonate composition comprises: a copolycarbonate comprising repeating units derived from a cyclohexylidene-bridged bisphenol; and an auxiliary polycarbonate comprising a branched homopolycarbonate; a poly(1,4-cyclohexanedimethylene terephthalate), a copolycarbonate derived from an isophorylidene-bridged bisphenol, and optionally a poly(alkylene cyclohexanedicarboxylate), poly(carbonate siloxane) having a siloxane content of less than 20 wt % based on the total weight of the poly(carbonatesiloxane), poly(aliphatic ester-carbonate) comprising bisphenol A carbonate units and C6-12 dicarboxy ester units; or a combination thereof. The polycarbonate compositions have one or more of a transparency of 89% or greater on 2.5 mm plaques according to ASTM-D1003-00; and a heat deformation temperature of at least 111° C., or at least 127° C. at 0.45 MPa or at least 98° C., or at least 110° C. at 1.82 MPa as determined on 3.18 mm bars per ASTM D648.

Claims15

Dependent claims

A composition comprising:

a copolycarbonate comprising repeating units derived from a cyclohexylidene-bridged bisphenol;
and
an auxiliary polycarbonate comprising a branched homopolycarbonate, a poly(1,4-cyclohexanedimethylene terephthalate), a copolycarbonate comprising repeating units derived from an isophorylidene-bridged bisphenol, or a combination thereof, and optionally a poly(alkylene cyclohexanedicarboxylate), a poly(carbonate siloxane) having a siloxane content of less than 20 weight % based on the total weight of the poly(carbonate-siloxane), a poly(aliphatic ester-carbonate) comprising bisphenol A carbonate units and C6-12 dicarboxy ester units, or a combination thereof;
wherein the branched homopolycarbonate comprises greater than or equal to 0.1 mole % of moieties derived from a branching agent based on total moles of the polycarbonate, and optionally comprises end-capping groups;
optionally, an additive composition, and
wherein a molded sample of the composition has a transparency of 89% or greater as measured using 2.5 mm plaques according to ASTM-D1003-00.

3 more elements

Dependencies are inferred from the claim text.