Agc Inc.

Nippon Steel Corporation

Makoto Uno

Taiki Hoshino

Keigo Matsuura

Masahiro Nakata

Yuji Yamaguchi

Kohichi Sano

Natsuko Sugiura

Eiichiro Anraku

Ryoichi Nishiyama

Masahiro Ito

Hiromasa Yamamoto

Daisuke Kobayashi

Koichi Murata

Kenji Ishizeki

Koki Watanabe

Yutaka Furukawa

Kiyotaka Takao

Yusuke Tomiyori

Motoshi Aoyama

Lilin Zhou

Toyokazu Enta

Ryuta Takashita

Takafumi Kawakami

Naoki Katsuki

The composition containing a compound represented by the formula (1) and a compound represented by the formula (2),R—(OX)—O—R—Y—[Si(R)L]  (1)[L(R)Si]—Y—R—(OX)—O—R—Y—[Si(R)L]  (2),where Rto R, Xto X, Yto Y, Rto R, Lto L, m1 to m2, n1 to n3, and g1 to g3 are as defined in the disclosure. An article, containing a substrate and a surface layer formed of the composition on the substrate.

Composition containing a fluorinated ether compound

A fluorinated ether compound and a composition capable of forming a light resistant surface layer and an article are provided. The fluorinated ether compound of the present invention has a poly(oxyfluoroalkylene) chain, a reactive silyl group and a group (A) represented by &#x2014;NR&#x2014;C(O)&#x2014; (wherein R is a hydrogen atom or an alkyl group), wherein the carbonyl carbon in the group (A) is bonded to a carbon atom, and the poly(oxyfluoroalkyiene) chain is located at the nitrogen end of the group (A).

Fluorine-containing ether compound, composition and article

A steel sheet has a specific chemical composition and has a structure represented by, by area ratio, ferrite: 5 to 60%, and bainite: 40 to 95%. When a region that is surrounded by a grain boundary having a misorientation of 15&#xb0; or more and has a circle-equivalent diameter of 0.3 &#x3bc;m or more is defined as a crystal grain, the proportion of crystal grains each having an intragranular misorientation of 5 to 14&#xb0; to all crystal grains is 20 to 100% by area ratio. A precipitate density of Ti(C,N) and Nb(C,N) each having a circle-equivalent diameter of 10 nm or less is 10precipitates/mmor more. A ratio (Hvs/Hvc) of a hardness at 20 &#x3bc;m in depth from a surface (Hvs) to a hardness of the center of a sheet thickness (Hvc) is 0.85 or more.

Steel sheet and plated steel sheet

To provide a fluorinated ether compound capable of forming a surface layer excellent in initial water/oil repellency, fingerprint stain removability, abrasion resistance and light resistance; a fluorinated ether composition and a coating liquid containing the fluorinated ether compound; an article having a surface layer excellent in initial water/oil repellency, fingerprint stain removability, abrasion resistance and light resistance and a method for producing it. A fluorinated ether compound having a poly(oxyperfluoroalkylene) chain having a unit (&#x3b1;) which is an oxyperfluoroalkylene unit having 5 or 6 carbon atoms, and a unit (&#x3b2;) which is an oxyperfluoroalkylene unit having at most 4 carbon atoms, and having at least one of a hydrolysable silyl group and a silanol group on at least one terminal of the poly(oxyperfluoroalkylene) chain via a linking group.

Fluorinated ether compound, fluorinated ether composition, coating liquid, article and its production method

A fluorinated ether compound represented by A-O&#x2014;(RO)&#x2014;R&#x2014;[C(O)N(R)]-Q-C(R)[-Q-SiRL], wherein A is a Cperfluoroalkyl group, Ris a linear fluoroalkylene group, m is an integer of from 2 to 500, Ris a linear fluoroalkylene group, Ris a hydrogen atom or an alkyl group, p is 0 or 1, Qis a single bond or an alkylene group, Ris a hydrogen atom, a monovalent hydrocarbon group or the like, Qis an alkylene group, Ris a hydrogen atom or a monovalent hydrocarbon group, L is a hydrolyzable group, and n is an integer of from 0 to 2 is provided. A fluorinated ether composition and a coating liquid capable of forming a surface layer excellent in initial water/oil repellency, fingerprint stain removability, abrasion resistance, light resistance and chemical resistance, an article having a surface layer, and a method for producing it are also provided.

A fluorinated ether compound, a fluorinated ether composition and a coating liquid capable of forming a surface layer excellent in initial water/oil repellency, fingerprint stain removability, abrasion resistance, light resistance and chemical resistance, an article having a surface layer and a method for producing it are provided. The fluorinated ether compound is represented by A-O&#x2014;(RO)-Q(R), wherein A is a C, perfluoroalkyl group, Ris a perfluoroalkylene group, m is an integer of from 2 to 500, (RO)a n d may consist of two or more types of RO differing in the number of carbon atoms, Qis a (b+1) valent perfluorohydrocarbon group which may have a hydroxy group, Ris a monovalent organic group having at least one hydrolyzable silyl group, b is an integer of at least 2, and the b Rmay be the same or different.

A steel sheet has a specific chemical composition and has a structure represented by, by area ratio, ferrite: 30 to 95%, and bainite: 5 to 70%. When a region that is surrounded by a grain boundary having a misorientation of 15&#xb0; or more and has a circle-equivalent diameter of 0.3 &#x3bc;m or more is defined as a crystal grain, the proportion of crystal grains each having an intragranular misorientation of 5 to 14&#xb0; to all crystal grains is 20 to 100% by area ratio. An average aspect ratio of ellipses equivalent to the crystal grains is 5 or less. An average distribution density of the total of Ti-based carbides and Nb-based carbides each having a grain size of 20 nm or more on ferrite grain boundaries is 10 carbides/&#x3bc;m or less.

A steel sheet has a specific chemical composition and has a structure represented by, by area ratio, ferrite: 0 to 30%, and bainite: 70 to 100%. When a region that is surrounded by a grain boundary having a misorientation of 15&#xb0; or more and has a circle-equivalent diameter of 0.3 &#x3bc;m or more is defined as a crystal grain, the proportion of crystal grains each having an intragranular misorientation of 5 to 14&#xb0; to all crystal grains is 20 to 100% by area ratio. A grain boundary number density of solid-solution C or a grain boundary number density of the total of solid-solution C and solid-solution B is 1 piece/nmor more and 4.5 pieces/nmor less. An average grain size of cementite precipitated at grain boundaries is 2 &#x3bc;m or less.

To provide a fluorinated ether compound capable of forming a surface layer excellent in fingerprint stain removability and abrasion resistance as before and more excellent in light resistance than ever. A fluorinated ether compound represented by A&#x2014;O&#x2014;(RO)&#x2014;A, wherein Ais a perfluoroalkyl group or the like, Ais &#x2014;Q[&#x2014;C(R)(R)]or the like, Ris a fluoroalkylene group, m is from 2 to 500, Qis a a+1 valent organic group, Ris &#x2014;Q&#x2014;Si(R)(R)(R), Ris a hydrogen atom, a halogen atom or the like, a is an integer of from 1 to 3, b is 2 or 3, Qis a single bond or a bivalent organic group, Ris &#x2014;Q&#x2014;Si(R)(R), Ris an alkyl group, Ris a hydrolyzable group or a hydroxy group, c, d and e are from 0 to 3, c+d+e is 3, c in at last one Ramong a plurality of Ris 2 or 3, Qis a bivalent organic group, Ris an alkyl group, Ris a hydrolyzable group or a hydroxy group, and g is from 1 to 3.

A steel sheet having a specific chemical composition and structure represented by, by area ratio, ferrite: 5 to 95%, and bainite: 5 to 95%. The proportion of crystal grains having an intragranular misorientation of 5 to 14&#xb0; to all crystal grains is 20 to 100% by area ratio. Hard crystal grains A in which precipitates or clusters with a maximum diameter of 8 nm or less are dispersed in the crystal grains with a number density of 1&#xd7;10to 1&#xd7;10pieces/cm. Soft crystal grains B in which precipitates or clusters with a maximum diameter of 8 nm or less are dispersed in the crystal grains with a number density of 1&#xd7;10pieces/cmor less are contained. The volume % of the hard crystal grains A/(the volume % of the hard crystal grains A+the volume % of the soft crystal grains B) is 0.1 to 0.9.

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Tokyo, Japan

Makoto Uno