Patent US3289950A successfully refreshed from Google Patents.
US4511596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the electron beam curing of coating compositions
Assignee: Novartis Corp
•
Filing: 1984-01-16
•
Granted: 1985-04-16
•
Expires: 2004-01-16
Abstract
Abstract The electron beam curing of ethylenically unsaturated coating compositions can be accelerated by the addition of sterically hindered amines. These amines are at the same time light stabilizers for the cured coating. 2,2,6,6-Tetraalkylpiperidine derivatives are examples of such amines. If a UV absorber is added to the coating compositions in addition, a synergistic increase in the light-stabilizing effect occurs.
Inventors
- 👤 Godwin Berner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:11
CPC Classifications
C; C09; C09D; C09D167/00; C09D167/06; C08; C08G; C08G59/00; C08G59/18; C08G59/68; C08G59/686; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3435; C09D4/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
55 words
A process for curing coating compositions, which contain ethylenically unsaturated compounds, by electron beam irradiation with the addition of a curing accelerator, which comprises using as the curing accelerator at least one 2,2,6,6-tetraalkylpiperidine derivative which, in its molecule, contains at least one group of the formula I ##STR22## in which R is hydrogen or methyl.
Claim 2
Dependent Claim
55 words
A process for curing coating compositions, which contain ethylenically unsaturated compounds, by electron beam irradiation with the addition of a curing accelerator, which comprises using as the curing accelerator at least one 2,2,6,6-tetraalkylpiperidine derivative which, in its molecule, contains at least one group of the formula I ##STR22## in which R is hydrogen or methyl.
Claim 3
Dependent Claim
42 words
A process according to claim 1, wherein the curing accelerator used is a piperidine derivative which, in its molecule, contains at least one group of the formula I, in which R is hydrogen and there is no hydrogen on the ring nitrogen.
Claim 4
Dependent Claim
30 words
A process according to claim 1, wherein the curable coating composition contains a light stabiliser from the class of UV absorbers, preferably a light stabiliser from the class of 2-(2'-hydroxyphenyl)-benzotriazoles.
Claim 5
Dependent Claim
22 words
A process according to claim 1, wherein the curable coating composition contains an organic compound of trivalent phosphorus, preferably an organic phosphite.
Claim 6
Dependent Claim
28 words
A process according to claim 1, wherein the curable coating composition is an automotive finish or a coil coating finish or a film finish or a wire enamel.
Claim 7
Dependent Claim
17 words
A process according to claim 1, wherein the coating composition is a constituent of a multi-coat finish.
Claim 8
Dependent Claim
25 words
A process according to claim 1, which is followed by an irradiation with UV light and wherein a photoinitiator is added to the coating composition.
Claim 9
Dependent Claim
16 words
A process according to claim 1 for curing coating compositions which do not contain any N-vinylpyrrolidone.
References Cited (Backward Citations)
US3619392A
Cited
US3699022A
Cited
US3901779A
Cited
US3767547A
Cited
US4129667A
Cited
US4279720A
Cited
US4301209A
Cited
US4382102A
Cited
US4393094A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |