Abstract: The present disclosure relates to high purity apparati, e.g., magnetic hard disk drives, and more specifically, to coatings for particle reduction of surfaces of such apparati. The provided coatings include thin polymer coatings with reactive pendant groups having crosslinking functionality and ability to anchor to substrate surfaces to suppress particle shedding from substrate surfaces. Provided is a substrate that includes a coating on at least a portion of the substrate that comprises a fluorinated acrylate random copolymer. Methods of reducing particulate contamination are also provided.

Abstract: A method of making a composition comprises independently providing a first component comprising a first compound, and a second components comprising a second compound; and combining the first component and the second component, wherein: a) the first compound is represented by and b) the second compound is represented by Rf represents a perfluoroalkyl group having from 1 to 12 carbon atoms. R1, R2, R3, and R4 each independently represent H or an alkyl group having from 1 to 6 carbon atoms. R5 represents H, an alkyl group having from 1 to 6 carbon atoms, or a hydroxyalkyl group having from 1 to 6 carbon atoms. R6 and R7 each independently represent an alkyl group having from 1 to 6 carbon atoms, or a hydroxyalkyl group having from 1 to 6 carbon atoms. Compositions preparable according to the method are also disclosed.

Abstract: The present disclosure relates to high purity apparati, e.g., magnetic hard disk drives, and more specifically, to coatings for particle reduction of surfaces of such apparati. The provided coatings include thin polymer coatings with reactive pendant groups having crosslinking functionality and ability to anchor to substrate surfaces to suppress particle shedding from substrate surfaces. Provided is a substrate that includes a coating on at least a portion of the substrate that comprises a fluorinated acrylate random copolymer. Methods of reducing particulate contamination are also provided.

Abstract: Coatings for particle suppression are provided. Such coatings comprise fluorochemical moieties and reactive pendant groups.

Abstract: A lubricant composition comprising a perfluoropolyether lubricant and fluorinated ketone solvent is described. The lubricant composition can be applied as a coating to a substrate such as magnetic media. After the coating dries, a thin uniform lubricant film covers the substrate surface. The fluorinated ketone solvent can solubilize a wide range of perfluoropolyether compounds but not potential contaminants such as water and hydrocarbons. Additionally, the solvent has low potential to adversely affect global warming.

Abstract: A method for cleaning a vapor reactor by applying a liquid cleaning agent comprising a fluorinated ketone having about 5 to about 10 carbon atoms and up to two hydrogen atoms is described. The fluorinated ketone has low global warming potential.