Tris(hydroxyphenyl) triazines

Patent metadata

Field	Value
Publication number	US-10047231-B2
Application number	US-92160306-A
Country	US
Kind code	B2
Filing date	May 31, 2006
Priority date	Jun 10, 2005
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

The instant invention relates to novel tris(hydroxyphenyl)triazines coating compositions, for instance automotive coating compositions, and to novel tris(hydroxyphenyl) triazines UV-absorbers having a long wavelength sifted absorption spectrum with significant absorbance up to 420 nm. Further aspects of the invention are a UV stabilized composition containing the novel UV-absorbers, a process for the stabilization of organic materials and coatings and the use of the compounds as UV-light stabilizers for organic materials and coatings.

First claim

The invention claimed is:

1. An automotive coating composition comprising compound of formula (IIa)

wherein
R 1 , R 1 ′ and R 1 ″ are independently hydrogen, C 4 -C 24 alkyl, C 2 -C 18 alkenyl or C 5 -C 12 cycloalkyl; and
R 21 , R 21 ′ and R 21 ″ are independently C 4 -C 24 alkyl, C 2 -C 18 alkenyl or C 5 -C 12 cycloalkyl.

2. The automotive coating composition according to claim 1 ,
wherein
R 1 , R 1 ′ and R 1 ″ are independently hydrogen or C 4 -C 12 alkyl; and
R 21 , R 21 ′ and R 21 ″ are independently C 4 -C 12 alkyl.

3. The automotive coating composition according to claim 1 ,
wherein the compound of formula (IIa) is present in an amount of from 0.1% to 30% by weight, based on the weight of the coating composition.

4. An automotive coating obtained by applying the automotive coating composition of claim 1 on a substrate.

5. The automotive coating according to claim 4 , comprising the following layers
(d) a cathodically deposited coating, adhering to a metal substrate;
(e) at least one subsequent coating layer containing a compound of formula (IIa) adhering to the cathodically deposited coating; and
(f) a clear top coating containing one or more UV-absorbers different from those of formula (IIa) and optionally further light stabilizers.

6. The automotive coating according to claim 4 wherein the automotive coating is applied over a substrate, which is sensitive to electromagnetic radiation of wavelengths greater than 380 nm.

7. The automotive coating composition according to claim 1 , wherein
R 1 , R 1 ′ and R 1 ″ are independently C 4 -C 12 alkyl; and
R 21 , R 21 ′ and R 21 ″ are independently C 4 -C 12 alkyl.

8. A process for the stabilization of an automotive coating against the deleterious influence of UV and/or visible light, which comprises admixing and/or applying to said automotive coating as stabilizer a compound of formula (IIa) according to claim 1 .

9. A process according to claim 8 wherein the automotive coating comprises
(g) applying a cathodically deposited coating, adhering to a metal substrate
(h) incorporating into at least one coating adhering to the cathodically deposited coating a compound of formula (IIa); and
(j) applying a clear top coating over the coating adhering to the cathodically deposited coating, which clear top coating contains one or more UV-absorbers different from those of formula (IIa) and optionally further light stabilizers.

10. An automotive coating composition comprising the following compound

11. An automotive coating composition comprising the following compound

Assignees

• Vogel Thomas
• Braig Adalbert
• Toan Vien Van
• Basf Se

Inventors

• Vogel Thomas
• Braig Adalbert
• Toan Vien Van

Classifications

• C09D7/48

  Stabilisers against degradation by oxygen, light or heat · CPC title

• Y10T428/31678

  Of metal · CPC title

• C09D5/4492 Primary

  containing special additives, e.g. grinding agents · CPC title

• C08K5/34926

  also containing heterocyclic groups other than triazine groups · CPC title