Polymeric composition
AssigneeSuncolor Corporation
InventorDavid A. Smetana
Life of this patent
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Abstract
The invention relates to a polymeric composition, comprising: at least one thermoplastic resin having a glass transition temperature of at least about 220° C.; inorganic particulates having an average particle size in the range up to about 100 nanometers dispersed in the thermoplastic resin, the inorganic particulates having an index of refraction in the range from about 1.4 to about 3; and an effective amount of at least one dispersant to disperse the inorganic particulates in the thermoplastic resin. The polymer composition may be a high temperature thermoplastic suitable for forming, such as by molding, optical articles such as lenses.
Claims17
A polymer composition for making a molded article, comprising:
- at least one thermoplastic resin having a glass transition temperature of at least 220° C.;
- inorganic particulates having an average particle size in the range up to 100 nanometers dispersed in the thermoplastic resin, the inorganic particulates having an index of refraction in the range from 1.4 to 1.8, the inorganic particulates being thermally stable at a temperature of at least 400° C., the dispersion of the inorganic particulates in the thermoplastic resin exhibiting a zeta potential of at least +30 mV or more negative than −30 mV;
- and
- at least one dispersant to disperse the inorganic particulates in the thermoplastic resin, the dispersant being thermally stable up to a temperature of at least 350° C.;
- wherein the polymer composition is thermally stable up to at least 400° C.;
- and
- wherein the molded article exhibits a luminous light transmission of at least about 85% of the maximum theoretical value of the luminous transmission.
Dependencies are inferred from the claim text.