# US 2009/0270291 A1 · Wet Lubricant Surface Coating Having Excellent Durability, Method for Surface Coating, and a Medical Device Having The Surface Coating

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- Number: US 2009/0270291 A1
- Document ID: US20090270291A1
- Status: Published application
- Kind: A1
- Application number: 11/908,394
- Filed: 2006-03-08
- Published: 2009-10-29
- Earliest claimed: 2005-03-11
- Assignees: Kaneka Corporation
- Inventors: Yoichi Matsumura; Shuhei Taniguchi
- Web page: https://patentgrep.com/patent/US20090270291A1

## CPC

- C10M 107/34: Polyoxyalkylenes
- A61L 29/085: {Macromolecular materials}
- A61L 31/10: Macromolecular materials
- C08G 18/3206: {aliphatic}
- C08G 18/36: Hydroxylated esters of higher fatty acids
- C08G 18/7621: {being toluene diisocyanate including isomer mixtures}
- C08G 18/7671: {containing only one alkylene bisphenyl group}
- C09D 175/04: Polyurethanes
- C10M 107/44: Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M 157/04: at least one of them being a nitrogen-containing compound
- A61L 2420/08: Coatings comprising two or more layers
- B05D 5/08: to obtain an anti-friction or anti-adhesive surface (rendering particulate materials free-flowing in general, e.g. making them hydrophobic B01J2/30)
- C10M 2217/045: Polyureas; Polyurethanes
- C10N 2020/04: Molecular weight; Molecular weight distribution
- C10N 2030/06: Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
- C10N 2040/00: Specified use or application for which the lubricating composition is intended
- C10N 2050/01: {Emulsions, colloids, or micelles}
- C10M: LUBRICATING COMPOSITIONS (well drilling compositions C09K8/02); USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION (mould release, i.e. separating, agents for metals B22C3/00, for plastics or substances in a plastic state, in general B29C33/56, for glass C03B40/02; textile lubricating compositions D06M11/00, D06M13/00, D06M15/00; immersion oils for microscopy G02B21/33)
- A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02)
- C10N: INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS

## Abstract

A lubricant surface coating having good lubricity and high durability, comprising (A) an urethane polymer layer comprising (a) 40 to 80% by weight of at least one component selected from an aromatic diisocyanate, an aliphatic diisocyanate and an alicyclic diisocyanate and (b) 20 to 60% by weight of a polyol having at least trifunctionality and (B) a hydrophilic polymer layer provided as the outer layer for the urethane polymer layer which comprises a polyalkylene glycol and/or a monomethoxypolyalkylene glycol; and a medical device having the surface coating.

## Claims

### Claim 1

A surface coating having wet-lubricity, comprising:
(A) a urethane polymer layer which includes (a) 40 to 80% by weight of at least one component selected from an aromatic diisocyanate, an aliphatic diisocyanate and an alicyclic diisocyanate and (b) 20 to 60% by weight of a polyol having at least trifunctionality, and
(B) a hydrophilic polymer layer which is provided as an outer layer for the urethane polymer layer and which includes a polyalkylene glycol and/or a monomethoxypolyalkylene glycol.

### Claim 2 (depends on 1)

The surface coating having wet-lubricity according to claim 1, wherein the polyalkylene glycol and/or monomethoxypolyalkylene glycol constituting the hydrophilic polymer layer (B) is a linear polyalkylene glycol and/or monomethoxypolyalkylene glycol having a weight average molecular weight of 1000 to 100000; or a polyfunctional polyalkylene glycol derivative satisfying the formula:
50000×n>weight average molecular weight>500×n (formula)
wherein n is the number of hydroxyl terminal group(s).

### Claim 3 (depends on 1, 2)

A medical device having the surface coating according to claim 1 or 2.

### Claim 4

A method for coating which provides a surface coating having wet-lubricity comprising the steps of:
coating a mixed solution including an isocyanate compound and a polyol on a surface to form a urethane polymer layer; and then
coating a solution including a polyalkylene glycol and/or a monomethoxypolyalkylene glycol.

### Claim 5 (depends on 4)

A surface coating produced by the method for coating according to claim 4.

### Claim 6 (depends on 5)

A medical device having the surface coating according to claim 5.