Basf Corporation

William C Walsh

Lawrence E James

Mark W Waldrop

Tom A Hazenstab

William Monahan

This invention relates to a plastics processing equipment cleaning compound comprising a hard outer shell made from a thermoplastic resin and a soft inner core containing a substituted pyrrolidone.

Substituted pyrrolidone plasticized thermoplastic resin useful as a

A process for making hot melt adhesive compositions comprising the steps of:

Process for making hot melt adhesives using water soluble substituted

Disclosed is a solvent-based cement for bonding joints of polyvinyl chloride pipe and fittings. The cement of the composition contains at least about 10% by weight of a polyvinyl chloride resin, at least about 2% by weight of a solid alcohol having a melting point above at least about 20.degree. C., and at least about 10% by weight of a solvent or a mixture of solvents. There is also provided a method of joining two pieces of thermoplastic material, such a poly(vinyl chloride) piping and fittings, and the product piece having one or more joints formed thereby.

Solid alcohol-filled PVC pipe cement

The present invention is directed to a method of removing polymer residue from chemical processing equipment, comprising contacting said residue with NMP vapors.

Method of cleaning polymer residues with NMP

Provided herein is a composition, system and method containing a hydrophobic lubricant and a water soluble solvent. The invention my also contain water. Specific solvents include akyl or alkoxy pyrrolidones such N-methyl-2-pyrrolidone which are added to or mixed with loom lubricators. Also provided is a method for inhibiting the increase in viscosity of lubricants used in polyolefin processing methods. Polyolefin compounds such as polyethylene, polypropylene and polybutylene are some of the compounds used in the invention. Provided are solutions, methods and systems used in manufacturing process that use polyolefins. The manufacturing processes include weaving, extruding and molding.

Self-cleaning polypropylene fabric weaving lubricant

Excess uncured paint is removed and reclaimed from a paint spray booth by bringing an air stream in which uncured paint particles are entrained into contact with a flowing aqueous flood sheet within the paint spray booth. A substantial portion of the uncured paint particles are solubilized within the flowing aqueous flood sheet and thereby removed from the stream of air. The flowing flood sheet most preferably includes (i) between about 10 to 45 percent by weight of an N-methyl pyrrolidone; (ii) between about 15 to about 40 percent by weight of at least one alkyl glycol ether having 1 to 4 carbon atoms in its alkyl moiety; and (iii) about 0.1 to about 2.0 percent by weight of a non-ionic linear alcohol ethoxylate surfactant sufficient to reduce the flood sheet vapor pressure. Thereafter, the solubilized uncured paint particles are separated and collected from the aqueous flood sheet and thereby reclaimed for future use.

Method for removing and reclaiming excess uncured paint from a paint

A process for the reclamation of polystyrene and other styrene containing polymers, by dissolving said polystyrene polymer into a water soluble solvent, such as NMP, and then precipitating said polymer away from the water soluble solvent through the addition of the water soluble solvent/styrene polymer solution into water. The particles of the polymer that precipitate out and float to the surface of the water can be collected and dried at temperatures that do not give added heat history to the polymer.

Reclamation of polymers, that contain styrene in the polymeric backbone,

This invention relates to water-based coating remover compositions comprising a substantially stable and homogeneous mixture of (a) from about 16 to about 55 percent by weight of N-methyl-2-pyrrolidone; (b) from about 11 to about 32 percent by weight of a dibasic ester; (c) from about 4 to about 20 percent by weight of a propylene glycol or glycol ether; (d) an effective amount of a hydroxypropyl cellulose thickener; and (e) from about 25 to about 65 percent by weight water. Exemplary dibasic esters useful in the present invention include at least one C.sub.1-4 dialkyl ester of at least one C.sub.4-6 aliphatic dibasic acid. Suitable glycol ethers include propylene glycol, propylene glycol oligomers or monoalkyl ether of monophenyl ether derivatives of said glycols and oligomers.

Water based wood stripping compositions

A composition for reclaiming paint and volatile organic paint carrier from industrial paint spray booths without increasing VOCs has been developed. The improvement over the existing booths recirculating hydrophilic based fluids, is the inclusion of a water based solution containing about 10 to about 45 per cent by weight of one or more N-alkyl pyrrolidones, about 15 to 40 percent by weight of one or more alkyl glycol mono alkyl ethers, a surfactant present in the amount of about 0.1 to 2.0 percent by weight, and the balance water.

Water-based paint spray booth flood sheets and methods of reclaiming

Method for removing and reclaiming excess uncured paint from a paint spray booth includes entraining uncured over-sprayed paint particles in a stream of air passing through the paint spray booth. The entrained over-sprayed paint particles are then caused to come into contact with a flowing aqueous flood sheet within the paint spray booth such that a substantial portion of said paint particles are solubilized within the flowing aqueous flood sheet and thereby removed from the stream of air. The flowing flood sheet includes (i) between about 10 to 45 percent by weight of an N-methyl pyrrolidone, (ii) between about 15 to about 40 percent by weight of at least one alkyl glycol ether having 1 to 4 carbon atoms in its alkyl moiety; and (iii) about 0.1 to about 2.0 percent by weight of a non-ionic linear alcohol ethoxylate surfactant sufficient to reduce the flood sheet vapor pressure. The solubilized uncured paint particles are thereafter separated and collected from the aqueous flood sheet so as to thereby be reclaimed for future use.

Method for removing and reclaiming excess uncured paint from paint spray

Methods for removing and reclaiming excess paint from a paint spray booth includes entraining over-sprayed paint particles in a stream of air passing though the pain spray booth and causing the entrained over sprayed paint particles to come into contact with a flowing flood sheet within the paint spray booth such that a substantial portion of the paint particles are solubilized within the flowing aqueous flood sheet and are thereby removed from the stream of air. The solubilized paint particles are then separated and collected from the aqueous flood sheet so as to be reclaimed for future use, whereas the aqueous flood sheet is then recycled to the paint spray booth after the paint particles have been separated therefrom. To permit the reclamation of paint particles, the flood sheet includes an aqueous paint carrier having at least one of an aprotic heterocyclic oxygenate, a C.sub.4 -C.sub.6, lactone or a cyclic carbonate together with at least one organic solvent.

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Archbold, OH, United States of America

William C Walsh