摘要:
An improved method for measuring the chromatographic properties, such as excluded volume, of hydrophobic polymer substrates is disclosed. Use of 0.05-1 micron sized crosslinked ionically-charged polymer particles, especially emulsion-form or ground polymer particles, as a large-molecule probe, allows environmentally friendly aqueous-based solvent systems to be used as mobile phases to characterize hydrophobic polymer supports for use in analytical or preparative scale chromatographic applications. This method eliminates the use of non-polar organic solvents that is required when conventional non-polar large-molecule probes (such as polystyrene) are used to characterize chromatographic media.
摘要:
A process for finishing leather and leather-like material which comprises applying a foamable latex to low grade leather and leather substitutes, drying and foaming the latex coated substrate, crushing the foam coating then treating the crushed foam coated low grade leather or leather-like material with a finish coat which results in the preparation of leather and leather substitutes having improved properties over leather and leather substitutes coated in the conventional manner.
摘要:
A new class of compounds having rust inhibiting and/or corrosion protecting properties is disclosed and claimed. The compounds (or mixtures thereof) are especially useful as rust inhibitors and for corrosion protection in hydrocarbon fuel or oil compositions, such as in gasoline, diesel and home heating fuels, industrial oils and lubricating oils, and such fuel and oil compositions incorporating the novel compounds are also disclosed and claimed. In a preferred embodiment the compounds are alkyl ammonium carboxylate salt-ethoxylated alkyl phenol esters of a trimer or dimer acid (or mixture thereof).
摘要:
Detergent motor fuel compositions are disclosed and claimed which are particularly useful in spark-ignition, internal combustion engines. The detergent compositions of the present invention contain certain additives which either substantially eliminate or maintain at a low level deposits which would otherwise form in the carburetor and in the intake valves and ports. Such carburetor and intake system deposits are to be avoided since they tend to restrict the flow of air through the carburetor especially at idle and at low speeds and/or cause improper valve closing and sluggish valve action. These conditions produce rough engine idling, stalling and can also result in excessive hydrocarbon and carbon monoxide exhaust emissions.
摘要:
A retroreflective film comprising a lamination of a first base layer having vacuum metallized hemispherical depressions on one surface thereof and a second layer having substantially hemispherical projections from the surface thereof formed from an optically transparent film wherein the first and second layers are arranged so that the hemispherical depressions of the base layer and the substantially hemispherical projections of the intermediate layer are concentrically arranged and the radius of the hemispherical depressions of the base layer is greater than the radius of the substantially hemispherical projections of the second layer. A laminate construction with matched opposing substantially hemispherical projections on the second layer is preferably provided with a third optically clear overlay film.
WHEREIN X is a hydrogen atom, a halogen atom, a trihalomethyl group, an alkyl group, or a cyano group, and Y is a hydrogen atom, a halogen atom, or a trihalomethyl group, AND COMPOSITIONS CONTAINING THESE COMPOUNDS EXHIBIT HERBICIDAL ACITIVITY.
摘要:
A method for providing nylon substrates with a durable, adherent silver coating and product by electroless deposition from a plating bath comprising silver salt, ammonia, anionic surfactant, formaldehyde, and sufficient acid to bring the pH to about 8.49.4. The substrates are sensitized with stannic chloride solution.
摘要:
Solution of 3-isothiazolones are stabilized against chemical decomposition of the isothiazolone by adding thereto a metal nitrate or a metal nitrite.
摘要:
Polyfunctional ester oxazolidines of the general formula
WHEREIN Z is a polyvalent alkylene, arylene, or alkenylene radical, R1 and R2 are hydrogen, alkyl, phenyl, or benzyl, X and Y are divalent (C2-C3)alkylene radicals, and N IS AN INTEGER EQUAL TO THE VALENCE OF Z, produced by means of a transesterification process are useful in preparing or formulating adhesives, caulks, lacquers, paints, varnishes, leather impregnants and moisture-cured coating systems.
摘要翻译:通式为:多价亚烷基,亚芳基或亚烯基的多官能酯恶唑烷,R 1和R 2为氢,烷基,苯基或苄基,X和Y为二价(C 2 -C 3)亚烷基,N IS AN 通过酯交换方法生产的Z的整数等于通过制备或配制粘合剂,填缝剂,漆,油漆,清漆,皮革浸渍剂和湿固化涂料体系。