Abstract:
A cathode catalyst layer used for a polymer electrolyte fuel cell that includes an electrolyte membrane is provided. The cathode catalyst layer comprises a catalyst having weight of not greater than 0.3 mg/cm2 of a reaction surface of the cathode catalyst layer that is adjoining the electrolyte membrane; and an electrolyte resin having oxygen permeability of not less than 2.2*10−14 mol/m/s/Pa in an environment of temperature of 80 degrees Celsius and relative humidity of 50%.
Abstract translation:提供了用于包含电解质膜的固体高分子型燃料电池的阴极催化剂层。 阴极催化剂层包含负极与电解质膜相邻的阴极催化剂层的反应面重量不大于0.3mg / cm 2的催化剂; 以及在80℃的温度和50%的相对湿度的环境中具有不低于2.2×10-14mol / m / s / Pa的透氧度的电解质树脂。
Abstract:
This invention relates to solid polymer electrolyte materials for use in one or more electrode of a fuel cell. The solid polymer electrolyte materials comprise one or more ionomer which comprises polymerized units of monomers A and monomers B, wherein monomers A are perfluoro dioxole or perfluoro dioxolane monomers, and the monomers B are functionalized perfluoro olefins having fluoroalkyl sulfonyl, fluoroalkyl sulfonate or fluoroalkyl sulfonic acid pendant groups, CF2═CF(O)[CF2]nSO2X.
Abstract translation:本发明涉及用于燃料电池的一个或多个电极的固体聚合物电解质材料。 固体聚合物电解质材料包含一种或多种离聚物,其包含单体A和单体B的聚合单元,其中单体A是全氟二氧杂环戊烯单体或全氟二氧戊环单体,单体B是具有氟代烷基磺酰基,氟烷基磺酸酯或氟烷基磺酸的全氟烯烃的官能化 侧链基团,CF 2 = CF(O)[CF 2] n SO 2 X。
Abstract:
Fluoroelastomer compositions comprising fluoroelastomers having copolymerized units of a nitrile-containing cure site monomer are cured with certain hydrazide curatives. The hydrazide is of the general formula R1(C(O))nNHNHR2, wherein n is 1 or 2; R1 is NH2, NHNH2, NHR3, NR32, NHNHC(O)NH2, NHNHC(O)NHNH2, NHNHR2, or NHC(O)NHNH2; R2 is H, alkyl, aryl, heterocycle, CO2R3, C(O)R3, CH2R4, or C(O)R4; R3 is alkyl, aryl, heterocycle, or CH2R4; and R4 is a fluoroalkyl group.
Abstract translation:包含具有含腈固化部位单体的共聚单元的含氟弹性体的含氟弹性体组合物用某些酰肼固化剂固化。 酰肼为通式R 1(C(O))nNHNHR 2,其中n为1或2; R1是NH2,NHNH2,NHR3,NR32,NHNHC(O)NH2,NHNHC(O)NHNH2,NHNHR2或NHC(O)NHNH2; R 2是H,烷基,芳基,杂环,CO 2 R 3,C(O)R 3,CH 2 R 4或C(O) R3是烷基,芳基,杂环或CH2R4; R4为氟代烷基。
Abstract:
Provided are liquid perfluoro-n-alkanes that are highly transparent to UV wavelengths ranging from about 150 nm to 165 nm, and to the method by which high transparency may be obtained. The liquid, perfluoro-n-alkanes are useful in optical couplants, optical cements, optical elements, optical inspection media for semiconductor wafers and devices, and immersion photolithography at 157 nm exposure wavelength.
Abstract:
A one or two layer coating system has been developed for plastic substrates. The one coating system low reflective layer consists of a fluorinated copolymer having the formula: VF2/TFE/HFP, VF2/HFP or VF2/TFE/PMVE. In the two coating system, the upper coating layer consists of TFE/HFP, VF2/TFE/HFP, or TFE/Perfluorodioxole, and the lower coating layer consists of VF2/TFE/HFP, VF/TFE/HFP, VAc/TFE/HFIB, or TFE graft to PVOH.
Abstract:
This invention relates to a fluoropolymer nanocomposite comprising a fluoropolymer phase and an inorganic oxide phase dispersed throughout, said inorganic oxide phase having either no particles or particles substantially all of which have a particle size of less than about 75 nm which can be determined by small angle x-ray scattering and transmission electron microscopy techniques. These nanocomposites are useful as protective coatings.
Abstract:
This invention concerns the application of substantially amorphous fluoropolymer compositions to stone so as to protect the stone from the deleterious effects of water and pollution.
Abstract:
A new class of low temperature initiators has been found, enabling fluoroolefin polymerizations at relatively low temperatures. These initiators are diacyl peroxides which allow improved productivity and product properties, as well as more favorable reaction conditions.
Abstract:
The present invention relates to in situ polymerization of fluoropolymer into porous substrates, to improve resistance to wear, tear and creep, decay, and degradation by wetting, staining and warping, and to improve durability while maintaining the appearance of the substrate.
Abstract:
Disclosed herein are novel amorphous tetrafluoroethylene-hexafluoropropylene (TFE-HFP) dipolymers, and other copolymers containing TFE, HFP and a third monomer, many of which are more random than previous amorphous TFE-HFP copolymers, as well as a novel high productivity continuous process for making these polymers. The polymers are particularly useful in the form of coatings, films and encapsulants.