3M Innovative Properties Company

Bert J Exsted

Steven L Kangas

Robert J Maki

Scott R Kaytor

Jeffrey M Mailand

Sean B Mahoney

Claudia L Allison

Cross-linkable melamine coating compositions

Coated porous materials that exhibit air permeability and repellency to liquids as well as coated, nonporous breathable materials are described as suitable for making ileostomy vent filters, transdermal drug substrates, agricultural and medical apparel, as well as paint and chemical protective garments. The coating composition is applied as a curable composition containing cross-linkable melamine, polyol and fluorocarbon alcohol precursors. Hydrophilic coatings may be prepared by incorporating a polyvalent salt with the curable composition.

Porous materials containing melamine resin

The present invention provides a microporous material or a membrane in which the membrane includes an azlactone moiety which is blended with or grafted to a thermoplastic polymer to provide a porous material having an internal structure characterized by a multiplicity of spaced, randomly disposed, non-uniform shaped, equiaxed particles of the polyazlactone polymer/thermoplastic polymer blends or the azlactone-graft copolymer. Each of the adjacent particles throughout the material are separated from one another to provide said material with a network of interconnected micropores and each of the particles are connected to each other by a plurality of fibrils. In addition to unmodified azlactone membranes, membranes which have been modified by subsequent reaction of the azlactone moiety with a suitable nucleophile are also included within the scope of the present invention. Preferred nucleophiles capable of reacting with an azlactone membrane of this invention include biologically significant nucleophiles such as amines, thiols and alcohols as well as amino acids, nucleic acids and proteins.

Thermally induced phase separated azlactone membrane

Microporous materials formed by thermally induced phase transition from a crosslinkable oil in combination with a thermoplastic polymer providing covalent bonding and immobilization of the oil diluent. Such materials are useful in graphic imaging substrates and fluid-repellent diapers and garments.

Microporous materials containing cross-linked oil

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Saint Paul, MN, United States of America

Bert J Exsted