Patent ID: 11939490
Assignee: MOMENTIVE PERFORMANCE MATERIALS INC.
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 0:
1. A metal substrate coated with a coating, the coating formed from a coating forming composition comprising:
(i) at least one alkoxysilane selected from the group consisting of Formula A:

(X—R1)aSi(R2)b(OR3)4-(a+b)  Formula A

or hydrolyzed and condensed products thereof,, wherein:
X is an organofunctional group;
each R1 is a linear, branched or cyclic divalent organic group of from 1 to about 12 carbon atoms optionally containing one or more heteroatoms;
each R2 independently is an alkyl, aryl, alkaryl or aralkyl group of from 1 to about 16 carbon atoms, optionally containing one or more halogen atoms;
each R3 independently is an alkyl group of from 1 to about 12 carbon atoms;
subscript a is 0 or 1, subscript b is 0, 1 or 2 and a+b is 1 or 2; and,
the amount of alkoxysilane of Formula A when subscript a is 0 or 1, subscript b is 0, 1 or 2 and a+b is 2 is from 0 to about 25 weight percent of the coating forming composition,
the amount of alkoxysilane of Formula A in which subscript a is 0 or 1, subscript b is 0 or 1 and a+b is 1 is from about 8 to about 40 weight percent of the coating forming composition, and
wherein the total amount of alkoxysilane of Formula A does not exceed about 50 weight percent of the coating forming composition;
(ii) at least one metal oxide in particulate form, the amount of metal oxide being from about 5 to about 50 weight percent of the coating forming composition;
(iii) at least one water miscible organic solvent;
(iv) at least one acid hydrolysis catalyst;
(v) water; and,
(vi) optionally, at least one condensation catalyst,
the coating forming composition having a viscosity within the range of from about 3.0 to about 7.0 cStks at 25° C.