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US 7,731,881 B2Granted
Method for making fog resistant thermoplastic articles and articles made therefrom
AssigneeSabic Innovative Plastics IP B.V.
InventorsJennifer Dean, Theodorus Lambertus Hoeks
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Abstract
A method for making a fog resistant thermoplastic article includes conditioning a thermoplastic article by exposing it to an aqueous environment sufficient to result in fog resistance.
Claims16
A method for making a fog resistant thermoplastic article, comprising:
- blending an aromatic thermoplastic polymer and an ionic anti-fog additive to form a blend;
- molding the blend to form an aromatic thermoplastic polymer article;
- and
- exposing the aromatic thermoplastic polymer article to an aqueous environment sufficient to result in a fog resistant aromatic thermoplastic polymer article,
- wherein the exposing comprises exposing to steam, immersing in water, spraying with water, misting with water, or combinations comprising at least one of the foregoing;
- wherein, without adding an anti-fog coating to the aromatic thermoplastic polymer article, the fog resistant aromatic thermoplastic polymer article has a greater fog resistance when compared to the aromatic thermoplastic polymer article prior to exposing;
- and
- wherein the exposing is performed for greater than or equal to about 20 minutes.
5 more elements
A method for making a fog resistant thermoplastic article, comprising:
- blending a thermoplastic polymer and an ionic or a non-ionic anti-fog additive to form a blend;
- molding the blend to form a thermoplastic article;
- and
- exposing the thermoplastic article to an aqueous environment sufficient to result in a fog resistant thermoplastic article,
- wherein the exposing comprises exposing to steam, immersing in water, spraying with water, misting with water, or combinations comprising at least one of the foregoing;
- and
- wherein, without adding an anti-fog coating to the thermoplastic article, the fog resistant thermoplastic article has a greater fog resistance when compared to the thermoplastic article prior to exposing;
- wherein the non-ionic anti-fog additive is a polysiloxane-polyether copolymer, a poly(propylene glycol)-poly(ethylene glycol)-poly(propylene glycol), or a poly(ethylene glycol)-poly(propylene glycol)-poly(ethylene glycol);
- and
- wherein the thermoplastic polymer comprises polycarbonate, an aromatic polycarbonate, a (co)polyestercarbonate, an aromatic (co)polyestercarbonate, blends thereof, or a combination comprising at least one of the foregoing polymers;
- and
- wherein the exposing is performed for greater than or equal to about 20 minutes.
9 more elements
A method for making a fog resistant thermoplastic article, comprising:
- blending an aromatic thermoplastic polymer and an ionic or non-ionic anti-fog additive to form a blend;
- molding the blend to form an aromatic thermoplastic polymer article;
- and
- exposing the aromatic thermoplastic polymer article to an aqueous environment sufficient to result in a fog resistant aromatic thermoplastic polymer article,
- wherein the exposing comprises exposing to steam, immersing in water, spraying with water, misting with water, or combinations comprising at least one of the foregoing;
- and
- wherein, without adding an anti-fog coating to the aromatic thermoplastic polymer article, the fog resistant aromatic thermoplastic polymer article has a greater fog resistance when compared to the aromatic thermoplastic polymer article prior to exposing;
- wherein the non-ionic anti-fog additive is a polysiloxane-polyether copolymer, a poly(propylene glycol)-poly(ethylene glycol)-poly(propylene glycol), or a poly(ethylene glycol)-poly(propylene glycol)-poly(ethylene glycol);
- and
- wherein the aromatic thermoplastic polymer comprises polyphenylene ether, aromatic polyester, polyphenylene ether/styrene blend, aromatic polyamide, polyethylene terephthalate, blends thereof, or a combination comprising at least one of the foregoing polymers;
- and
- wherein the exposing is performed for greater than or equal to about 20 minutes.
9 more elements
Dependencies are inferred from the claim text.