US 11,702,563 B2
Two-component coating compositions for coating fiber-reinforced plastics materials
Elke Westhoff, Muenster (DE); Henan Li, Ludwigshafen (DE); Markus Saedler, Muenster (DE); Andreas Dopp, Muenster (DE); and Lea Fedeler, Muenster (DE)
Assigned to BASF COATINGS GMBH, Münster (DE)
Appl. No. 16/631,334
Filed by BASF Coatings GmbH, Münster (DE)
PCT Filed Jul. 20, 2018, PCT No. PCT/EP2018/069797
§ 371(c)(1), (2) Date Jan. 15, 2020,
PCT Pub. No. WO2019/020524, PCT Pub. Date Jan. 31, 2019.
Claims priority of application No. 17183052 (EP), filed on Jul. 25, 2017.
Prior Publication US 2020/0208009 A1, Jul. 2, 2020
Int. Cl. C08G 18/48 (2006.01); C09D 175/06 (2006.01); B29C 45/00 (2006.01); B29C 45/14 (2006.01); B29C 70/48 (2006.01); C08G 18/24 (2006.01); C08G 18/28 (2006.01); C08G 18/32 (2006.01); C08G 18/42 (2006.01); C08G 18/66 (2006.01); C08G 18/78 (2006.01); C08G 18/79 (2006.01); B29K 67/00 (2006.01)
CPC C09D 175/06 (2013.01) [B29C 45/0001 (2013.01); B29C 45/0053 (2013.01); B29C 45/14 (2013.01); B29C 70/48 (2013.01); C08G 18/246 (2013.01); C08G 18/2825 (2013.01); C08G 18/325 (2013.01); C08G 18/3206 (2013.01); C08G 18/4241 (2013.01); C08G 18/4825 (2013.01); C08G 18/6674 (2013.01); C08G 18/7837 (2013.01); C08G 18/792 (2013.01); B29C 2045/0079 (2013.01); B29K 2067/00 (2013.01)] 20 Claims
 
1. A two-component coating material composition which comprises a paint base component A and a curing component B, wherein the paint base component A comprises:
i. one or more polyols A1 which are selected from the group of polyols containing ester groups and which possess a hydroxyl number of 300 to 500 mg KOH/g and have a hydroxyl group functionality of greater than 2;
ii. one or more aliphatic polyols A2 free from ether groups and ester groups, of the general formula (I)
R1—(OH)p  (I)
in which R1 is a p-valent branched, cyclic or linear, saturated or unsaturated, aliphatic hydrocarbon radical having 5 to 18 carbon atoms, the radical R1 optionally comprising one or more tertiary amino groups, and p is 2 to 6;
iii. one or more species A3 of the general formula (II)
R2—(C═O)r—O-(AO)s—R3  (II)
in which R2 is a saturated or unsaturated, aliphatic hydrocarbon radical having 6 to 30 carbon atoms, R3 is H, a radical PO(OH)2, or the optionally partially phosphated radical of a mono-or disaccharide, or the optionally partially phosphated radical of an alditol, AO represents one or more alkylene oxide radicals selected from the group consisting of ethylene oxide, propylene oxide and butylene oxide,
r is 0 or 1, and s is 0 to 30;
iv. one or more crosslinking catalysts A4 selected from the group of organo tin compounds;
v. optionally one or more polyamines A5 having at least two secondary amino groups and an amine number of 120 to 280 mg KOH/g;
vi. optionally one or more polyether diols A6;
vii. optionally one or more polyether-modified alkylpolysiloxanes A7;
viii. optionally one or more pigments A8 and/or one or more fillers A8; and
ix. optionally one or more additives A9 selected from the group consisting of wetting and/or dispersing agents, rheological assistants, and flow control agents;
and wherein the curing component B comprises:
i. one or more polyisocyanates B1 which have on average 2.4 to 5 NCO groups; and
the two-component coating material composition possesses a solids content of at least 96 wt %, based on the total weight of the two-component coating material composition according to ASTM D369 (2015), and
wherein the molar ratio of the NCO groups in the curing component B to the acidic hydrogen atoms of the hydroxyl groups, primary amino groups and secondary amino groups in the paint base component A is from 1:1.15 to 1:0.95.