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US 5,852,158 AGranted
Thermoplastically moldable compositions
AssigneeGeneral Electric Company
InventorsJohannes Joachim De Bont, Johanes Martinus Dina Goossens
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Abstract
The mold release performance of pentaerythritol esters is enhanced in polycarbonate resin moldings by partial replacement with an ester of dipentaerythritol.
Claims12
A thermoplastically moldable, synthetic resin composition, which consisting essentially of;
- a thermoplastically moldable aromatic polycarbonate resin;
- an effective mold release proportion of an ester of pentaerythritol;
- and
- a mold release enhancing proportion of an ester of dipentaerythritol.
1 more element
A method for reducing the amount of pressure needed to eject an article from a mold, which comprises:
- (a) adding an effective mold release proportion of an ester of pentaerythritol, and an effective mold release enhancing proportion of an ester of dipentaerythritol to a thermoplastically moldable aromatic polycarbonate resin, thereby forming a molding resin;
- (b) molding said molding resin in a mold to form a molded article;
- and
- (c) ejecting said molded article from said mold.
1 more element
Dependencies are inferred from the claim text.