Coating compositions based on fluorine-containing inorganic polycondensates, their production and their use

Claim 2

A coating composition comprising a polycondensate of one or more hydrolyzable compounds of at least one element M selected from the group consisting of elements of groups IIIA to VA and groups IIB to IVB of the Periodic Table of Elements having hydrolyzable groups A, at least a portion of said hydrolyzable compounds also having non-hydrolyzable carbon-containing groups B, wherein the total molar ratio of groups A to groups B in said hydrolyzable compounds is from 10:1 to 1:2, and wherein 0.1 to 500 mol. % of said groups B are groups B' which on the average contain 5 to 30 fluorine atoms bonded to one or more aliphatic carbon atoms, where said carbon atoms are separated from said element M by at least two atoms.

Claim 3

The composition of claim 1, wherein said element M are selected from the group consisting of Si, Al, B, Pb, Sn, Ti, Zr, V, Zn and mixtures thereof.

Claim 4

The composition of claim 2, wherein said element M is selected from the group consisting of Si, Al, Ti, Zr and mixtures thereof.

Claim 5

The composition of claim 1, wherein the molar ratio of groups A to groups B is from 5:1 to 1:1.

Claim 6

The composition of claim 4, wherein the molar ratio of groups A to groups B is from 4:1 to 2:1.

Claim 7

The composition of claim 1, wherein 0.1-1 mol. % of said groups B are groups B'.

Claim 8

The composition of claim 6, wherein 0.1-2 mol. % of said groups B are groups B'.

Claim 9

The composition of claim 1, wherein said groups B' on average contain 5 to 25 fluorine atoms.

Claim 10

The composition of claim 8, wherein said groups B' contain on average 8 to 18 fluorine atoms.

Claim 11

The composition of claim 9, wherein said fluorine atoms are bonded to aliphatic carbon atoms which are separated from M by at least two carbon atoms.

Claim 12

The composition of claim 1, wherein 1-100 mol. % of said groups B and groups B' have at least one carbon-carbon double bond or carbon-carbon triple bond.

Claim 13

The composition of claim 11, wherein 5-85 mol. % of said groups B and groups B' have at least one carbon-carbon double bond or carbon-carbon triple bond.

Claim 14

The composition of claim 12, wherein 20-70 mol. % of said groups B and groups B' have at least one carbon-carbon double bond or carbon-carbon triple bond.

Claim 15

The composition of claim 11, wherein said groups B and groups B' are acryloxy alkyl or methacryloxy alkyl groups.

Claim 16

The composition of claim 1, wherein said element M is selected from the group consisting of Al, Ti, Zr and mixtures thereof, and wherein a portion of said groups B form a complex with said element M, wherein said complex-forming groups are selected from the group consisting of aliphatic carboxylic acids, β-diketones and β-carbonyl carboxylates; fluorinated aliphatic carboxylic acids, β-diketones and β-carbonyl carboxylates; unsaturated aliphatic carboxylic acids, β-diketones and β-carbonyl carboxylates; and fluorinated unsaturated aliphatic carboxylic acids, β-diketones and β-carbonyl carboxylates.

Claim 17

The composition of claim 11, further comprising a photoinitiator.

Claim 18

The composition of claim 11, further comprising a radically polymerizable carbon compound selected from the group consisting of styrene, acrylic acid, methacrylic acid and derivatives thereof.

Claim 19

A process for preparing a coating composition comprising a polycondensate of one or more hydrolyzable compounds of at least one element M selected from the group consisting of elements of groups IIIA to VA and groups IIB to IVB of the Periodic Table of Elements having hydrolyzable groups A, at least a portion of said hydrolyzable compounds also having non-hydrolyzable carbon-containing groups B, wherein the total molar ratio of groups A to groups B in said hydrolyzable compounds is from 10:1 to 1:2. and wherein 0.1 to 5 mol. % of said groups B are groups B' which on the average contain 5 to 30 fluorine atoms bonded to one or more aliphatic carbon atoms, wherein said carbon atoms are separated from said element M by at least two atoms, wherein said hydrolyzable compounds contain a total possible number of M--OH groups when said hydrolyzable compounds are hydrolyzed with water, comprising the steps of: (1) hydrolyzing and precondensing said hydrolyzable compounds containing said hydrolyzable groups B and not containing said groups B' by adding water to said hydrolyzable compounds containing groups B to form a precondensate composition; (2) adding said hydrolyzable compounds containing said groups B' to said precondensate composition; and (3) condensing and hydrolyzing said hydrolyzable compounds containing said groups B' and said precondensate composition by adding water thereto to form said coating composition; wherein said adding step is conducted when said condensate composition has a water content not more than 5% by weight based on the total weight of said precondensate composition, and when not more than 50% of said total possible M--OH groups are present in said precondensate composition.

Claim 20

A process for preparing a coating composition comprising a polycondensate of one or more hydrolyzable compounds of at least one element M selected from the group consisting of elements of groups IIIA to VA and groups IIB to IVB of the Periodic Table of Elements having hydrolyzable groups A, at least a portion of said hydrolyzable compounds also having non-hydrolyzable carbon-containing groups B, wherein the total molar ratio of groups A to groups B in said hydrolyzable compounds is from 10:1 to 1:2. and wherein 0.1 to 5 mol. % of said groups B are groups B' which on the average contain 5 to 30 fluorine atoms bonded to one or more aliphatic carbon atoms, wherein said carbon atoms are separated from said element M by at least two atoms, wherein said hydrolyzable compounds contain a total possible number of M--OH groups when said hydrolyzable compounds are hydrolyzed with water, comprising the steps of: (1) hydrolyzing and precondensing said hydrolyzable compounds containing said hydrolyzable groups B and not containing said groups B' by adding water to said hydrolyzable compounds containing groups B to form a precondensate composition; (2) adding said hydrolyzable compounds containing said groups B' to said precondensate composition; and (3) condensing and hydrolyzing said hydrolyzable compounds containing said groups B' and said precondensate composition by adding water thereto to form said coating composition; wherein said adding step is conducted when said condensate composition has a water content not more than 5% by weight based on the total weight of said precondensate composition, and when not more than 50% of said total possible M--OH groups are present in said precondensate composition.

Claim 21

The process of claim 18, wherein at least 90 mol. % of said hydrolyzable groups A are alkoxy groups.

Claim 22

The process of claim 19, wherein at least 95 mol. % of said hydrolyzable groups A are alkoxy groups.

Claim 23

The process of claim 19, wherein said alkoxy groups are C 1-4 alkoxy groups.

Claim 24

The process of claim 21, wherein said alkoxy groups are methoxy or ethoxy groups.

Claim 25

The process of claim 18, wherein said element M is selected from the group consisting of Si, Al, Zr, Ti and mixtures thereof.

Claim 26

The process of claim 18, wherein said adding step is conducted when said precondensate composition has a water content not more than 3.5% by weight.

Claim 27

The process of claim 24, wherein said adding step is conducted when said precondensate composition has a water content not more than 2% by weight.

Claim 28

The process of claim 18, wherein the molar ratio of the total water added to hydrolyzable groups A is from 1:1 to 0.3:1.

Claim 29

The process of claim 26, wherein said molar ratio of the total water added to hydrolyzable groups A is from 0.7:1 to 0.5:1.

Claim 30

The process of claim 18, wherein all of said hydrolyzable compounds containing said hydrolyzable groups B and not containing said groups B' are hydrolyzed and precondensed in said hydrolyzing step (1).

Claim 31

The process of claim 18, wherein a portion of said hydrolyzable compounds containing said hydrolyzable groups B and not containing said groups B' is added during said hydrolyzing step (1) and the remainder of said hydrolyzable compounds containing said hydrolyzable groups B and not containing said groups B' is added to said precondensate composition.

Claim 32

A coating composition prepared by the process of claim 18.