Huntsman Petrochemical Corporation

Susan A Woodrum

James R Machac, Jr

Edward T Marquis

Howard P Klein

Katty Darragas

John R Sanderson

Ronald L Savage

David C Alexander

Robert E Baldwin

Ralph M DiGuilio

Edward Chung-Yit Nieh

Mike W McKinney

Jr James R Machac

A composition useful as a paint remover which may include a carbonate, a dibasic ester and a mono-ester. The paint stripping composition may also contain an organic sulfur-containing compound such as dimethyl sulfoxide (DMSO), a glycol ether, a ketone, or combination thereof. The composition may be used in a process for removing paint by applying it to a painted surface. A degreasing composition is also disclosed which may comprise a carbonate and a alkyl-substituted cyclo-alkane such as naphthene. The compositions have several important attributes, including low toxicity and high efficacy in removing paint and coatings.

Degreasing compositions

This invention concerns a composition useful as a paint remover, comprising: an organic carbonate, an alcohol, an activator, hydrogen peroxide, and water. The alcohol may be benzyl alcohol. The organic carbonate may be propylene carbonate, ethylene carbonate, or combination thereof. The activator may be an alkyl-substituted cycloalkane (naphthene), a soy oil, an alkyl soyate, or combination thereof.

Paint stripping compositions

Identified herein are inhibitors which may be added to the boiling pot portion of a distillation apparatus prior to or during the distillation of an alkylene carbonate. The inhibitors retard the occurrence of undesirable reactions of the alkylene carbonate with itself and impurities present in the pot, and hence greatly reduce or minimize the formation of undesirable by-products which otherwise tend to reduce overall yields of alkylene carbonate recovered by the distillation process. Higher distillation temperatures at higher pressures over the prior art are possible without attendant losses of significant amounts of recovered alkylene carbonate, which confers heretofore unseen flexibility in alkylene carbonate distillation.

Polymerization-inhibited distillation

The present invention provides a more economical method of producing multifunctional carbonate resins. It overcomes the disadvantage of using relatively expensive starting material, such as polyglycidyl ethers, that have traditionally been used. The present invention makes use of readily available and inexpensive multi-isocyanate compounds reacted with organic carbonates that contain pendant hydroxyl groups to produce products that contain two or more carbonate functionalities. One form of the present invention is a method for preparing a carbonate urethane compound by reacting a carbonate containing compound that also contains a reactive hydroxyl group with a compound containing at least two isocyanate groups. The reaction is performed in a solvent and in the presence of a base.

Multifunctional carbonates and derivatives

The present invention includes methods and compositions for the removal of coatings such as paint from surfaces. The methods of the present invention are typically conducted between about 45&deg; C. and about 75&deg; C., and the compositions typically contain a carbonate, a dibasic ester, a pyrrolidine, a mono-ester. The formulations of the present invention typically exhibit a high efficacy in the removal of paint while having a low level of toxicity.

Process and formulations to remove paint and primer coatings from thermoplastic polyolefin substrates

Propylene carbonate based cleaning compositions. The compositions comprise propylene carbonate, a glycol ether, water, and an acid activator. The compositions may optionally also comprise hydrogen peroxide. The present invention also provides for a method of removing a soil from a hard surface, wherein a cleaning composition comprising propylene carbonate, a glycol ether, water, and an acid activator is applied to the hard surface. After application of the cleaning composition, the soil is removed from the hard surface without the exertion of mechanical force.

Propylene carbonate based cleaning compositions

A composition useful as a paint remover, including alkylene carbonate such as propylene carbonate or ethylene carbonate, and an alcohol such as benzyl alcohol. Also, a process for removing paint, comprising: applying a composition containing alkylene carbonate and an alcohol to a painted surface for a time and under conditions effective to reduce adhesion between the top coats and the primer or undercoat of the paint. In another aspect, this paint remover includes dialkyl carbonate and an alcohol, optionally containing a glycol ether. In another aspect, the process includes applying a composition containing dialkyl carbonate and an alcohol. This paint remover may include a thickener, a surfactant, or a corrosion inhibitor.

Paint stripper for aircraft and other multicoat systems

A composition useful as a paint remover. The composition may include a carbonate, a dibasic ester and a mono-ester. The composition may also contain an organic sulfur-containing compound such as dimethyl sulfoxide (DMSO), a glycol ether, a ketone, or combination thereof. The composition may be used in a process for removing paint by applying it to a painted surface. The compositions have several important attributes, including low toxicity and high efficacy in removing paint and coatings.

Paint and coating remover

This invention concerns a process to provide high purity alkylene carbonate though use of multiple distillations wherein the unused fractions are recycled to the reactor. The high purity alkylene carbonate may be further purified by use of carbon to produce electrochromic or photochromic grade alkylene carbonate by reducing its UV absorbance.

Process for the purification of alkylene carbonate

Coating remover compositions comprising an alkylene carbonate, hydrogen peroxide, water, a first alcohol, a second alcohol, and, optionally, pine oil that exhibit low toxicity. Further, a method of removing a coating from a surface. The method involves contacting a composition comprising an alkylene carbonate, hydrogen peroxide, water, a first alcohol, a second alcohol, and optionally, pine oil to a coated surface, and allowing the composition to contact the coated surface for a period of time, and under conditions effective to cause blistering of the coating. The compositions and method of the present invention are particularly suited for use with varnishes.

Carbonate-based coating removers

This invention concerns a composition useful as a paint remover, comprising: alkylene carbonate such as propylene carbonate or ethylene carbonate, hydrogen peroxide, and water, and optionally an alcohol such as benzyl alcohol. In another broad respect, this invention concerns a process for removing paint, comprising: applying a composition containing alkylene carbonate, hydrogen peroxide, and water to a painted surface for a time and under conditions effective to cause blistering or bubbling of the paint. In another broad respect, this invention is a composition useful as a paint remover, comprising: dialkyl carbonate, hydrogen peroxide, and water, optionally containing an alcohol, optionally containing a glycol ether. In another broad respect, this invention is a process for removing paint, comprising: applying a composition containing dialkyl carbonate, hydrogen peroxide, and water to a painted surface for a time and under conditions effective to cause blistering or bubbling of the paint. Advantageously, the composition of this invention may include a dibasic ester (DBE).

A thickened composition and process useful for removing paint, comprising: a carbonate such as propylene carbonate or ethylene carbonate, a thickener such as polyvinyl pyrrolidone (PVP), hydrogen peroxide and water. The composition may include additional cosolvents such as glycol ethers and alcohols such as benzyl alcohol, and/or dibasic ester (DBE).

Growing community of inventors

Round Rock, TX, United States of America

Susan A Woodrum