Curable resin coated sheet having reduced tack
AssigneeMinnesota Mining and Manufacturing Company
InventorsMatthew T. Scholz, Dennis C. Bartizal, Katherine E. Reed, Wayne K. Larson, Dean A. Ersfeld, Timothy C. Sandvig, Richard S. Buckanin
Life of this patent
Estimating the term…
Abstract
A curable resin coated sheet useful as an orthopedic bandage which has reduced tack is provided. The resin coated sheet is pre-lubricated with a lubricant which is (a) bonded to the resin, (b) added to the resin or applied to the surface of the coated sheet, or (c) a combination of (a) and (b). The lubricant is present in an amount to reduce the kinetic coefficient of friction of a surface of the coated sheet to less than 1.2.
Claims21
An article comprising a water-curable resin-coated sheet having a lubricant at a major surface of the coated sheet, wherein said water-curable resin is an isocyanate-functional prepolymer and wherein the lubricant is comprised of hydrophilic groups which are covalently bonded to the water-curable isocyanate-functional prepolymer, said lubricant being present in an amount such that the kinetic coefficient of friction of the coated surface of the sheet material is less than about 1.2.
An article comprising a curable resin-coated sheet having a lubricant at a major surface of the coated sheet, wherein said lubricant comprises an alkyl sulfate surfactant additive which is in compatible with the curable resin and wherein said lubricant is present in an amount such that the kinetic coefficient of friction of the coated surface of the sheet material is less than about 1.2.
An article comprising a curable resin-coated sheet having a lubricant at a major surface of the coated sheet, wherein said lubricant comprises an anionic polyethoxylated sufactant additive which is incompatible with the curable resin and wherein said lubricant is present in an amount such that the kinetic coefficient of friction of the coated surface of the sheet material is less than about 1.2.
An article comprising a curable resin-coated sheet having a lubricant at a major surface of the coated sheet, wherein said lubricant comprises an additive which is incompatible with the curable resin, said additive being a polymer comprised of a plurality of hydrophilic groups and being comprised of repeating units derived from one or more of the following ethylenically unsaturated monomers:
- acrylamide, vinylpyrrolidone, vinylacetate and its polymeric hydrolyzed derivatives, hydroxy and amino functional lower alkyl acrylate, and wherein said lubricant is present in an amount such that the kinetic coefficient of friction of the coated surface of the sheet material is less than about 1.2.
An article comprising a curable resin-coated sheet having a lubricant at a major surface of the coated sheet, wherein said lubricant comprises an additive which is a mixture of any of the compositions selected from the group consisting of a surfactant, a polymer comprised of a plurality of hydrophilic groups, and a polysiloxane, and wherein said lubricant is present in an amount such that the kinetic coefficient of friction of the coated surface of the sheet material is less than about 1.2.
An article comprising a curable resin-coated sheet having a lubricant at a major surface of the coated sheet, wherein said lubricant comprises hydrophilic groups which are covalently bonded to the curable resin and an additive which is incompatible with the curable resin, and wherein said lubricant is present in an amount such that the kinetic coefficient of friction of the coated surface of the sheet material is less than about 1.2.
An article comprising a pre-lubricated curable resin-coated sheet wherein the curable resin is a water-curable isocyanate-functional prepolymer which is a derivative of an aromatic polyisocyanate and wherein a major surface of the sheet exhibits a kinetic coefficient of friction of less than about 1.2.
An article comprising a pre-lubricated, curable resin-coated fiberglass fabric sheet wherein the fiberglass fabric sheet is an extensible, heat-set, knit fiberglass fabric, wherein the curable resin is a fluid, water-curable isocyanate-functional prepolymer derived from (a) an aromatic polyisocyanate and (b) a mixture of polyether polyols comprised of a copolymer of polypropylene oxide and polyethylene oxide, wherein an additive comprising a polydimethylsiloxane is a deposit on a surface of the curable resin-coated sheet, and wherein the amount of polyethylene oxide and polydimethylsiloxane is sufficient such that the kinetic coefficient of friction of a major surface of the curable resin-coated sheet material is less than about 1.2.
A method of preparing a sheet coated with a curable resin and having reduced tack comprised of coating a sheet with a curable resin wherein the resin is comprised of hydrophilic groups which are covalently bonded to the resin and which are present in an amount sufficient to reduce the kinetic coefficient of friction of a major surface of the sheet material to less than about 1.2.
A method of enclosing a body member, comprising the steps of:
- initiating the cure of an article comprising a pre-lubricated curable resin-coated sheet wherein a major surface of the sheet exhibits a kinetic coefficient of friction of less than about 1.2;
- and
- wrapping the article about the body member and molding the wrapped article about the body member after the initiation of cure such that the article is used as an orthopedic casting material.
Dependencies are inferred from the claim text.