US 12,365,812 B2
Thin corrosion protective coatings incorporating polyamidoamine polymers
Donald Robb Vonk, Clinton Township, MI (US); Thomas Sullivan Smith, II, Novi, MI (US); and Alvaro Bobadilla, Oceanside, CA (US)
Assigned to Henkel AG & Co. KGaA, Duesseldorf (DE)
Filed by Henkel AG & Co. KGaA, Duesseldorf (DE)
Filed on Aug. 30, 2021, as Appl. No. 17/461,100.
Application 17/461,100 is a continuation of application No. 15/783,038, filed on Oct. 13, 2017, granted, now 11,104,823.
Application 15/783,038 is a continuation of application No. PCT/US2016/023676, filed on Mar. 23, 2016.
Claims priority of provisional application 62/148,163, filed on Apr. 15, 2015.
Prior Publication US 2021/0388231 A1, Dec. 16, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C09D 177/08 (2006.01); C08K 3/08 (2006.01); C09D 5/08 (2006.01); C23C 22/34 (2006.01); C08K 3/16 (2006.01); C08K 3/22 (2006.01); C08K 3/28 (2006.01)
CPC C09D 177/08 (2013.01) [C09D 5/084 (2013.01); C23C 22/34 (2013.01); C08K 3/08 (2013.01); C08K 2003/085 (2013.01); C08K 3/16 (2013.01); C08K 3/22 (2013.01); C08K 2003/2244 (2013.01); C08K 3/28 (2013.01)] 18 Claims
 
1. An anti-corrosion metal pretreatment composition comprising components:
a) from 10 to 2000 ppm of dissolved Group IVB metal;
b) from 1 to 50 ppm of dissolved copper;
c) from 1 to 5000 ppm of at least one nitrogen containing organic polyamidopolyamine polymer which is a reaction product resulting from a polymerization reaction of alkyldiamines, polyamines and/or polyalkylpolyamines with a carboxylic acid or carboxylic acid derivative, dissolved and/or dispersed in the composition and comprising a plurality of organic amide and amine functional groups and optionally imidazoline functional groups, wherein the at least one polyamidopolyamine polymer comprises a mixture of two polyamidopolyamine polymers, wherein a first polyamidopolyamine polymer has a number average molecular weight of from about 200 to 400 Daltons and a second polyamidopolyamine polymer, different from the first, has a weight average molecular weight ranging from 200 to 10,000 Daltons; and
d) water;
said anti-corrosion metal pretreatment composition having a pH of from 2 to 6.