US 11,939,490 B2
Curable surface-protective coating composition, processes for its preparation and application to a metallic substrate and resulting coated metallic substrate
Rajkumar Jana, Bangalore (IN); Christoph Hilgers, Pulheim (DE); Indumathi Ramakrishnan, Bangalore (IN); Karthikeyan Murugesan, Bangalore (IN); and Wibke Hartleb, Siegburg (DE)
Assigned to MOMENTIVE PERFORMANCE MATERIALS INC., Waterford, NY (US)
Appl. No. 16/634,780
Filed by MOMENTIVE PERFORMANCE MATERIALS INC., Waterford, NY (US)
PCT Filed Jul. 31, 2018, PCT No. PCT/US2018/044559
§ 371(c)(1), (2) Date Jan. 28, 2020,
PCT Pub. No. WO2019/027991, PCT Pub. Date Feb. 7, 2019.
Application 16/634,780 is a continuation in part of application No. 15/664,023, filed on Jul. 31, 2017, abandoned.
Claims priority of application No. 18165148 (EP), filed on Mar. 29, 2018.
Prior Publication US 2020/0207992 A1, Jul. 2, 2020
Int. Cl. B05D 3/02 (2006.01); C08G 77/18 (2006.01); C09D 5/08 (2006.01); C09D 183/06 (2006.01); C08K 3/22 (2006.01); C08K 3/36 (2006.01); C09D 4/00 (2006.01)
CPC C09D 5/08 (2013.01) [B05D 3/0254 (2013.01); C08G 77/18 (2013.01); C09D 183/06 (2013.01); C08K 2003/2227 (2013.01); C08K 3/36 (2013.01); C09D 4/00 (2013.01)] 33 Claims
 
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.