Nonaqueous coating material compositions, coatings produced therefrom and having improved adhesion and scratch resistance and also use thereof

Patent metadata

Field	Value
Publication number	US-2017355875-A1
Application number	US-201515526843-A
Country	US
Kind code	A1
Filing date	Nov 30, 2015
Priority date	Dec 8, 2014
Publication date	Dec 14, 2017
Grant date	—

Abstract

A nonaqueous coating material composition and a coating produced from the coating material composition are provided. The coating material composition contains at least one polyhydroxyl group-containing component, at least one polyisocyanate group-containing component, at least one catalyst, and at least one urethane additive (PF) which has specific groups. The urethane additive (PF) is prepared by reacting 0.5 to 20 mol % of the isocyanate groups originally present in a polyisocyanate (PI) with a component (Ia) and 10 to 99.5 mol % of the isocyanate groups originally present in the polyisocyanate (PI) with a component (IIa). The component (Ia) contains at least one perfluoroalkyl group of a specific formula and one group reactive toward the isocyanate groups. The component (IIa) contains at least one silane group of a specific formula and one group reactive toward the isocyanate groups.

First claim

1 . A nonaqueous coating material composition, comprising
at least one polyhydroxyl group-containing component (A), at least one polyisocyanate group-containing component (B), at least one catalyst (D), and at least one urethane additive (PF) which is different from component (B) and which comprises at least one perfluoroalkyl group of formula (I)
CR 1 3 —(CR 2 2 ) x —  (I),

where
R 1 and R 2 independently are H, F and/or CF 3 , with the proviso that R 1 and R 2 are not both H, and
x is 1 to 20, and
at least one silane group of formula (II)
—X—Si—R 3 s G 3−s   (II)

where
G is independently a hydrolyzable group,
X is organic radical,
R 3 is alkyl, cycloalkyl, aryl, or aralkyl, wherein the carbon chain is optionally interrupted by nonadjacent oxygen, sulfur, or NRa groups, where Ra is alkyl, cycloalkyl, aryl or aralkyl,
s is 0 to 2,
wherein the urethane additive (PF) is prepared by reacting 0.5 to 20.0 mol % of isocyanate groups originally present in at least one polyisocyanate (PI) with a component (Ia) which has at least one perfluoroalkyl group of the formula (I) and one group that is reactive toward the isocyanate groups, and 10.0 to 99.5 mol % of the isocyanate groups originally present in the polyisocyanate (PI) with a component (IIa) which is different from the component (Ia) and which has at least one silane group of the formula (II) and one group reactive toward the isocyanate groups.

2 . The coating material composition as claimed in claim 1 , wherein in the formula (I)
x is 3 to 11, and in the formula (II) G is independently halogen, alkoxy group, alkylcarbonyl group, or acyloxy group, X is linear or branched alkylene or cycloalkylene radical having 1 to 20 carbon atoms, R 3 is alkyl radical, and s is 0 to 1.

3 . The coating material composition as claimed in claim 1 , wherein the urethane additive (PF) is prepared by reacting
0.5 to 20.0 mol % of the isocyanate groups originally present in the polyisocyanate (PI) with the component (Ia), 30.0 to 98.5 mol % of the isocyanate groups originally present in the polyisocyanate (PI) with the component (IIa), and 1.0 to 69.5 mol % of the isocyanate groups originally present in the polyisocyanate (PI) with a monofunctional component (IIIa) which is different from components (Ia) and (IIa) and which is reactive toward the isocyanate groups.

4 . The coating material composition as claimed in claim 3 , wherein the urethane additive (PF) is prepared by reacting
1.0 to 16.0 mol % of the isocyanate groups originally present in the polyisocyanate (PI) with the component (Ia), 64 0 to 89.0 mol % of the isocyanate groups originally present in the polyisocyanate (PI) with the component (IIa), and 10.0 to 30.0 mol % of the isocyanate groups originally present in the polyisocyanate (PI) with the component (IIIa)

5 . The coating material composition as claimed in claim 1 , wherein, in the urethane additive (PF), 95 to 100 mol % of the isocyanate groups originally present in the polyisocyanate (PI) are reacted with the component (Ia), the component (IIa), and optionally a component (IIIa).

6 . The coating material composition as claimed in claim 1 , wherein the component (IIa) comprises:
one or more aminosilanes of formula (IIa-1)
H—NR 4 t —[X—Si—R 3 s G 3−s s ] 2−t   (IIa-1),

where
X, R 3 , G, and s have the same definition given for the formula (II),
R 4 is hydrogen, alkyl, cycloalkyl, aryl, or aralkyl, wherein the carbon chain is optionally interrupted by nonadjacent oxygen, sulfur, or NRa groups, where Ra is alkyl, cycloalkyl, aryl, or aralkyl, and t is 0 or 1; or
a mixture of at least one compound of formula (IIa-2) and at least one compound of formula (IIa-3)
H—NR 4 —(X—SiR 3 s (OR 5 ) 3−s )  (IIa-2)

HN(X—SiR 3 u (OR 5 ) 3−u ) n (X′—SiR 3 ′ w (OR 5 ′) 3−w w) m   (IIa-3),

where
R 3 , R 4 , and s have the same definition given for the formula (IIa-1),
R 5 and R 5 ′ are hydrogen, alkyl, or cycloalkyl, wherein the carbon chain is optionally interrupted by nonadjacent oxygen, sulfur, or NRa groups, where Ra is alkyl, cycloalkyl, aryl, or aralkyl,
X and X′ are linear and/or branched alkylene or cycloalkylene radical having 1 to 20 carbon atoms,
n is 0 to 2, m is 0 to 2, m+n is 2, and u and w are 0 to 2.

7 . The coating material composition as claimed in claim 6 , wherein the component (IIa) comprises a mixture of
100 to 5 mol %, based on a total amount of the compounds (IIa-2) and (IIa-3), of the at least one compound of the formula (IIa-2); and 0 to 95 mol %, based on the total amount of the compounds (IIa-2) and (IIa-3), of the at least one compound of the formula (IIa-3).

8 . The coating material composition as claimed in claim 1 , wherein the component (Ia) is a fluoroalcohol of formula (Ia-1)
CR 1 3 —(CR 2 2 ) x —(CH 2 ) y —O-A z -H  (Ia-1),
where R 1 and R 2 independently are H, F and/or CF 3 , with the proviso that R 2 are not simultaneously H, x is 1 to 20, y is 1-6, z is 0-100, A is CR′R″—CR″′R″″—O or (CR′R″) a —O or CO—(CR′R″) b —O, R′, R″, R″′, and R″″ independently are H, alkyl, cycloalkyl, awl, any organic radical having 1 to 25 C atoms, and a and b are 3-5.

9 . The coating material composition as claimed in claim 3 , wherein the component (IIIa) is at least one selected from the group consisting of a primary monoalcohol, a secondary monoalcohol, a tertiary monoalcohol, and a secondary monoamine.

10 . The coating material composition as claimed in claim 1 , wherein the polyisocyanate (PI) is at least one selected from the group consisting of an aliphatic polyisocyanate, a cycloaliphatic, and a polyisocyanate obtained from trimerization, dimerization, urethane formation, biuret formation, uretdione formation, or allophanate formation.

11 . The coating material composition as claimed in claim 1 , comprising the urethane additive (PF) in an amount of 0.05 to 10.0 wt %, based on a binder fraction of the coating material composition.

12 . The coating material composition as claimed in claim 1 , wherein the at least one polyhydroxy group-containing component (A) is a polyol, which has an OH number of 30 to 400 mg KOH/g and is selected from the group consisting of a polyester polyol, a polyurethane polyol, a polysiloxane polyol, a polyacrylate polyol, a polymethacrylate polyol, or a mixture thereof.

13 . A method for producing a multicoat paint system, the method comprising:
applying a pigmented basecoat film to an optionally precoated substrate and thereafter applying a film comprising the coating material composition as claimed in claim 1 .

14 . A clearcoat material for automotive OEM finishing, finishing of parts for installation in or on automobiles and/or utility vehicles, and automotive refinish, comprising
the coating material composition as claimed in claim 1 .

15 . A multicoat effect and/or color paint system, comprising
at least one pigmented basecoat and at least one clearcoat disposed thereon, wherein the clearcoat is produced from the coating material composition as claimed in claim 1 .

16 . A method for coating an article, the method comprising:
finishing coating the article by applying the coating material composition as claimed in claim 1 to the article, wherein the article is an automotive OEM, a part for installation in or on automobiles and/or utility vehicles, and an automotive.

Assignees

• Basf Coatings Gmbh

Inventors

• Klein Guenter
• Wenking Ulrike
• Weiher Christian
• Feigl Andreas

Classifications

• C08G18/808

  Monoamines · CPC title

• C08G18/8087

  containing halogen atoms · CPC title

• C08G18/0852 Primary

  the solvents being organic · CPC title

• C08G18/791

  containing isocyanurate groups · CPC title

• C09D175/04 Primary

  Polyurethanes · CPC title