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Novel phosphorus containing epoxy networks
(United States Patent and Trademark Office, 1990-11-27)
Epoxy resins can be cured or crosslinked with triphenyl phosphine oxide compounds having epoxy-reactive (active hydrogen) substituents either alone or in combination with amine-terminated polyarylene ethers (e.g., ...
Sulfonated polymer composition for forming fuel cell electrodes
(United States Patent and Trademark Office, 2009-06-09)
A membrane electrode assembly for a fuel cell is described. The materials for the membrane electrode assembly are formed from sulfonated polymers. A polymer dispersion ink containing the sulfonated polymer and a mixture ...
Method for making polyimide
(United States Patent and Trademark Office, 2003-05-27)
The invention is directed to method for making a polyimide by converting the dianhydride to the ester acid and reacting the ester acid with a diamine. The invention allows for the controlled addition of aliphatic diamines ...
High refractive index thermoplastic polyphosphonates
(United States Patent and Trademark Office, 2003-11-25)
High refractive index, melt processable polyphosphonates and methods for preparing the same are provided. These polymers are particularly useful for optical and ophthalmic parts, such as lenses. A method of preparing optical ...
Ion-conducting sulfonated polymeric materials
(United States Patent and Trademark Office, 2008-04-22)
Sulfonated polymers are made by the direct polymerization of a sulfonated monomer to form the sulfonated polymers. The types of sulfonated polymers may include polysulfones or polyimides. The sulfonated polymers can be ...
Novel phosphorus containing epoxy networks based on trihydrocarbyl phosphine oxides having active substituents
(United States Patent and Trademark Office, 1992-02-04)
Epoxy resins can be cured or crosslinked with trihydrocarbyl phosphine oxide compounds having epoxy-reactive (active hydrogen) substituents either alone or in combination with amine-terminated polyarylene ethers (e.g., ...
Chlorine resistant desalination membranes based on directly sulfonated poly(arylene ether sulfone) copolymers
(United States Patent and Trademark Office, 2011-10-04)
The present invention provides a membrane, kit, and method of making a hydrophilic-hydrophobic random copolymer membrane. The hydrophilic-hydrophobic random copolymer membrane includes a hydrophilic-hydrophobic random ...
High refractive index thermoplastic polyphosphonates
(United States Patent and Trademark Office, 2006-06-27)
High refractive index, melt processable polyphosphonates and methods for preparing the same are provided. These polymers are particularly useful for optical and ophthalmic parts, such as lenses. A method of preparing optical ...
Sulfonated polymer composition for forming fuel cell electrodes
(United States Patent and Trademark Office, 2010-09-07)
A membrane electrode assembly for a fuel cell is described. The materials for the membrane electrode assembly are formed from sulfonated polymers. A polymer dispersion ink containing the sulfonated polymer and a mixture ...
Poly(amide-acid) compositions derived from tetracarboxylic acid dianhyrides capable of solution imidization
(United States Patent and Trademark Office, 1993-03-16)
The imidization temperature of poly(amide-acid) compositions derived from tetracarboxylic acid dianhydrides can be lowered by use of a bis(aminophenoxyphenyl) phosphine oxide in the diamine component which is reacted with ...