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US 7,256,225 B2Granted
Methods of preparing a polymeric material
AssigneeGeneral Electric Company
InventorsPaul W. Buckley, Jiawen Dong, Mark H. Giammattei, Hua Guo, Norberto Silvi
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Abstract
A method is disclosed to prepare a polymeric material by filtering solutions of poly(arylene ether) and/or poly(alkenyl aromatic) through one or more filtration systems to provide a material having reduced levels of particulate impurities. The polymeric material prepared is suitable for use in data storage media applications.
Claims50
A method of preparing a polymeric material, comprising:
- filtering a first solution comprising poly(arylene ether), poly(alkenyl aromatic), and a solvent through a first filtration system to form a first filtrate;
- concentrating the first filtrate to form a second solution having a percent weight solids level greater than that of the first filtrate;
- filtering the second solution through a second filtration system to create a second filtrate;
- and
- isolating from the second filtrate a polymeric material comprising poly(arylene ether) and poly(alkenyl aromatic).
2 more elements
A method of preparing a polymeric material, comprising:
- filtering a first solution through a first filtration system to form a first filtrate, wherein the first solution comprises a solvent, about 60 to about 30 percent by weight of poly(phenylene ether) and about 40 to about 70 percent by weight of polystyrene based on the total weight of poly(phenylene ether) and polystyrene;
- concentrating the first filtrate to form a second solution having a percent weight solids level greater than that of the first filtrate;
- filtering the second solution through a second filtration system to create a second filtrate;
- and
- isolating from the second filtrate a polymeric material comprising poly(arylene ether) and poly(alkenyl aromatic), wherein the polymeric material is substantially free of visible particulate impurities.
2 more elements
A method of preparing a polymeric material, comprising:
- filtering a first solution comprising poly(arylene ether) and a solvent through a first filtration system to form a first filtrate;
- combining the first filtrate and a poly(alkenyl aromatic) to form a second solution;
- filtering the second solution through a second filtration system to create a second filtrate;
- and
- isolating from the second filtrate a polymeric material comprising poly(arylene ether) and poly(alkenyl aromatic).
2 more elements
A method of preparing a polymeric material, comprising:
- filtering a superheated solution comprising poly(arylene ether), poly(alkenyl aromatic), and a solvent in a solution filtration system to form a filtrate;
- and
- isolating a polymeric material from the filtrate, wherein the polymeric material comprises poly(arylene ether) and poly(alkenyl aromatic).
Dependencies are inferred from the claim text.