Rapid cure silicone lubricious coatings

Patent metadata

Field	Value
Publication number	US-11833496-B2
Application number	US-202117553237-A
Country	US
Kind code	B2
Filing date	Dec 16, 2021
Priority date	Nov 15, 2011
Publication date	Dec 5, 2023
Grant date	Dec 5, 2023

Abstract

Novel, lubricious coatings for medical devices are disclosed. The coatings provide improved lubricity and durability, and are readily applied in coating processes. The present invention is also directed to a novel platinum catalyst for use in such coatings. The catalyst provides for rapid curing, while inhibiting cross-linking at ambient temperatures, thereby improving the production pot life of the coatings.

First claim

I claim:

1. A catalyst solution for cross-linkable silicone polymer coatings, consisting essentially of platinum divinyltetramethyldisiloxane ethynylcyclohexanol complex in xylene having the formula:
Pt[(CH 2 ═CH)(Me) 2 Si] 2 O.C 6 H 10 (OH)(C≡CH),

wherein in the combination of said catalyst with a cross linkable siloxane formulation, there is less than a 5% change in viscosity after 6 days at ambient temperature.

2. A catalyst solution for cross-linkable silicone polymer coatings, consisting essentially of platinum divinyltetramethyldisiloxane ethynylcyclohexanol complex as a reaction product of a platinum divinyl tetramethyldisiloxane and an ethynylcyclohexanol in xylene having the formula:
Pt[(CH 2 =CH)(Me) 2 Si] 2 O·C 6 H 10 (OH)(C≡CH),

and other reaction products of the platinum divinyl tetramethyldisiloxane and the ethynylcyclohexanol, wherein in the combination of said catalyst with a cross linkable siloxane formulation, there is less than a 5% change in viscosity after 6 days at ambient temperature.

Assignees

• Ethicon Inc

Inventors

• Ou Duan Li

Classifications

• B01J31/2282 Primary

  Unsaturated compounds used as ligands · CPC title

• A61L29/085 Primary

  Macromolecular materials · CPC title

• A61L29/14

  Materials characterised by their function or physical properties {, e.g. lubricating compositions} · CPC title

• A61L31/10

  Macromolecular materials · CPC title

• A61L31/14

  Materials characterised by their function or physical properties {, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials} · CPC title