Albemarle Corporation

Ethyl Corporation

Other

Burnell Lee

Hsueh M Li

William E Moehle

Farah D Azarnia

Robert M Moore, Jr

Robert L Davis

Edgar E Spielman, Jr

A stabilized solvent composition which is comprised of: a solvent portion which includes at least 90 wt % n-propyl bromide; and a 1,4-dioxane-free stabilizer system which includes 2,2-dialkoxypropane in which each alkoxy group independently contains up to 3 carbon atoms. The solvent composition is useful as a degreaser and cleaner in both cold and vapor cleaning systems.

Stabilized brominated alkane solvent

This invention relates to a solvent system which is non-flammable and which is comprised of a hydrocarbon solvent having a flash point less than about 38.degree. C. and a second solvent containing at least 90 wt % n-propyl bromide, the second solvent being present in an amount sufficient to obtain no flash point for the solvent system when tested in accordance with ASTM D-93 and the second solvent being the sole halogenated solvent and flash point suppressor in the solvent system.

No flash point solvent system containing normal propyl bromide

This invention relates to a solvent system and process for cleaning cellulose triacetate polymer camera film. The solvent system comprises n-propyl bromide and a mix of an alkyl bromide in which the alkyl group contains 4 to 7 carbon atoms and an alkane containing 6 to 7 carbon atoms.

Movie film cleaning solvent comprising n-propylbromide

This invention relates to a solvent system and process for cleaning cellulose triacetate polymer camera film. The solvent system comprises n-propyl bromide and an alkyl bromide in which the alkyl group contains 4 to 7 carbon atoms.

Movie film cleaning process

This invention relates to a solvent system and process for cleaning cellulose triacetate polymer camera film. The solvent system comprises n-propyl bromide and an alkane containing 6 to 7 carbon atoms.

This invention relates to non-stabilized or at least only lightly stabilized n-propyl bromide-based solvent systems which are suitable for use in the presence of metals which normally and easily catalyze the dehydrobromination of brominated hydrocarbons, such as isopropyl bromide.

Solvent system

This invention discloses a process where a portion of an amine terminated polyamic acid intermediate is end-capped with an aromatic monoanhydride additionally substituted with a free carboxylic acid and a carboxylic ester. The polyamic acids of this invention are readily converted to high molecular weight polyimides.

Process for forming end capped polyamic acids polyimides

This invention discloses a process where a portion of an amine terminated polyamic acid intermediate is end-capped with an aromatic monoanhydride additionally substituted with a free carboxylic acid or ester thereof. The polyamic acids of this invention are readily converted to high molecular weight polyimides which may contain a small amount of amide groups.

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Baton Rouge, LA, United States of America

Burnell Lee