Lubricative coating composition, article and assembly containing same and method thereof
AssigneeBecton, Dickinson and Company
InventorDavid E. Spielvogel
Life of this patent
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Abstract
A lubricating composition includes an emulsion of a noncuring polysiloxane, a surfactant and water. Preferred polysiloxanes include a polar group, most preferably an aminoalkyl or carboxylalkyl terminating group. Preferred surfactants are copolymers of polysiloxane and polyoxyethylene. A metal article such as a needle, blade, cannula or quidewire includes a coating of the polysiloxane and the surfactant which renders the article surface lubricious. The article may be in a sliding relationship with a plastic article in an assembly such as a catheter-quidewire or a catheter-cannula assembly. The plastic portion of the assembly may also include a lubricant. The invention includes a method of making the lubricated article.
Claims11
A metal article having thereon a lubricious coating comprising a noncuring polysiloxane lubricant selected from the group consisting of the formula ##STR3## wherein R.sub.1 is NH.sub.2 NHR.sub.2 or COOH, R.sub.2 is lower alkyl of 1 to 4 carbon atoms, n is 2 to 4, and x is an integer sufficient to give the lubricant a viscosity of about 10 to 2,000,000 centistokes, and a polyoxyethylene polysiloxane copolymer surfactant.
A metal article having thereon a coating comprising a noncuring aminopropyl terminated polysiloxane lubricant selected from the group consisting of the formula ##STR4## wherein R.sub.1 is NH.sub.2 NHR.sub.2 or COOH, R.sub.2 is lower alkyl of 1 to 4 carbon atoms, n is 2 to 4, and x is an integer sufficient to give the lubricant a viscosity of about 10 to 2,000,000 centistokes, and a polyoxyethylene polysiloxane copolymer surfactant.
A method for lubricating a metal article comprising:
- a) providing an emulsified lubricating composition which includes water, a polyoxyethylene polysiloxane copolymer surfactant and a polysiloxane lubricant selected from the group consisting of the formula ##STR5## wherein R.sub.1 is NH.sub.2 NHR.sub.2 or COOH, R.sub.2 is lower alkyl of 1 to 4 carbon atoms, n is 2 to 4, and x is an integer sufficient to give the lubricant a viscosity of about 10 to 2,000,000 centistokes;
- b) applying a coating of said composition onto a surface of a metal article;
- and
- c) removing said water from the coated metal surface to give a lubricated surface.
A method for lubricating a metal article comprising:
- a) providing an emulsified lubricating composition which includes water, a polyoxyethylene polysiloxane copolymer surfactant and an aminopropyl terminated polysiloxane lubricant selected from the group consisting of the formula ##STR6## wherein R.sub.1 is NH.sub.2, R.sub.2 is lower alkyl of 1 to 4 carbon atoms, n is 2 to 4, and x is an integer sufficient to give the lubricant a viscosity of about 10 to 2,000,000 centistokes;
- b) dipping a metal article into said composition;
- c) withdrawing said article from said composition to give a coating on said article;
- and
- d) evaporating the water from the coating on the article to give a lubricated surface.
Dependencies are inferred from the claim text.