摘要:
This invention relates to disubstituted tin compounds of the formula (R1-Sn-R2)n wherein each of R1 and R2 is a substituent selected from the class consisting of aryloxyaryl radicals containing from two to three benzene rings, wherein each said aryl radical is an aromatic hydrocarbon radical, and n is an integer with a value of at least 1. These compounds are useful as antioxidants for polyphenyl ether base fluids.
摘要:
A process for improving the shear strength of a graphite fiberresin matrix wherein the fibers are coated with a soluble coating compound consisting of a metal hydroxide, peroxide, halide, nitrate, nitrite, permanganate, dichromate or sulfide, and heated in a controlled atmosphere at above 400* C. prior to incorporation in the composite; such composites being useful as structural materials.
摘要:
A method of making polyimide hollow spheres from a tetracarboxylic acid-ditertiary amine reaction product and an aromatic diamine in an aqueous solution.
WHERE X=2-6, USEFUL AND FUNCTIONAL FLUIDS. THE AREAS OF UTILITY ARE HEAT-EXCHANGE MEDIA, GYRO FLUIDS, LUBRICANTS, ANTI-CORROSIVE AGENTS AND VISCOSITY-INDEX IMPROVERS.