Article including a substrate, a phosphate binding layer and a fluoroplyether layer

1. An article which comprises a metal substrate, a phosphate binding layer, and a fluoropolyether layer,

wherein

the fluoropolyether layer is formed of a fluoropolyether compound having a fluoropolyether group and a carbon-carbon double bond,

the fluoropolyether compound having a fluoropolyether group and a carbon-carbon double bond is a compound obtained by reacting:

(A) a triisocyanate prepared by trimerizing a diisocyanate, with

(B) a combination of at least two active hydrogen-containing compounds wherein the component (B) comprises:

(B-1) a fluoropolyether having at least one active hydrogen, and

(B-2) a monomer having an active hydrogen atom and a carbon-carbon double bond,

the phosphate binding layer is formed of a phosphoric acid derivative,

the phosphoric acid derivative is a compound of the formula:

wherein:

R 11 is each independently H or a C 1-3 alkyl group,

R 13 is each independently a divalent organic group,

the metal substrate is a SUS substrate.

2. A process for producing the article as claimed in claim 1 , which article comprises a metal substrate, a phosphate binding layer, and a fluoropolyether layer, the process comprising:

(i) treating a surface of the metal substrate with a phosphoric acid derivative to form the phosphate binding layer on the surface of the metal substrate, and

(ii) treating a surface of the phosphate binding layer with a fluoropolyether compound having a fluoropolyether group and a carbon-carbon double bond to form the fluoropolyether layer on the surface of the phosphate binding layer.

3. The process for producing as claimed in claim 2 , the process further comprising irradiating the phosphate binding layer and the fluoropolyether layer with ultraviolet light.