US4668713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conformal coating systems
Assignee: Henkel Loctite Ireland Ltd
•
Filing: 1985-12-16
•
Granted: 1987-05-26
•
Expires: 2005-12-16
Abstract
Abstract Compositions useful as UV curable conformal coatings are mixtures, substantially free of isocyanate condensation catalyst, of the following constituents: (i) a compound having two or more alkenyl or alkynyl groups; (ii) a compound having two or more mercapto groups; (iii) a compound having two or more isocyanate groups; and (iv) a free radical photoinitiator. The composition cures by a secondary mechanism in shadow areas and has a long pot life, for example 8-24 hours.
Inventors
- 👤 John Woods
- 👤 John M. Rooney
- 👤 Bernard J. Bolger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:20
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3855; C08G18/3876; C08F; C08F299/00; C08F299/02; C08F299/022; C08G18/04; C08G75/00; C08G75/02; C08G75/04; C08G75/045; H; H05; H05K; H05K3/00; H05K3/22; H05K3/28; H05K3/285; H05K3/287; H05K2201/00; H05K2201/09; H05K2201/09818; H05K2201/09872
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
112 words
A coating composition, especially useful for conformal coating, the composition substantially free of isocyanate condensation catalyst and comprising the following constituents: (i) a compound having two or more 'ene groups wherein the 'ene groups are selected from the group consisting of alkenyl and alkynyl groups; (ii) a compound having two or more mercapto groups per molecule; the ratio of said 'ene groups to said mercapto groups in the composition being between 0.2/1 and 5/1, (iii) between 10% and 90% by weight of the constituents (i)-(iv) of an isocyanate compound having 2-20 isocyanate groups per molecule; and (iv) between 0.05% and 10% by weight of the constituents (i)-(iv) of a free radical photoinitiator.
Claim 2
Dependent Claim
112 words
A coating composition, especially useful for conformal coating, the composition substantially free of isocyanate condensation catalyst and comprising the following constituents: (i) a compound having two or more 'ene groups wherein the 'ene groups are selected from the group consisting of alkenyl and alkynyl groups; (ii) a compound having two or more mercapto groups per molecule; the ratio of said 'ene groups to said mercapto groups in the composition being between 0.2/1 and 5/1, (iii) between 10% and 90% by weight of the constituents (i)-(iv) of an isocyanate compound having 2-20 isocyanate groups per molecule; and (iv) between 0.05% and 10% by weight of the constituents (i)-(iv) of a free radical photoinitiator.
Claim 3
Dependent Claim
35 words
A coating composition according to claim 1, formed by mixing a two part composition in which the first part comprises the said constituents (i), (ii), and (iv), and the second part comprises the constituent (iii).
Claim 4
Dependent Claim
31 words
A coating composition according to claim 1 wherein the 'ene groups are the alkyl or vinyl groups in the group consisting of O-allyl, N-allyl, O-vinyl, N-vinyl or p-vinyl phenol ether groups.
Claim 5
Dependent Claim
37 words
A coating composition as in claim 1 wherein constituent (i) is present in the range 5-80% by weight of the composition and the constituent (ii) is present in the range of 5-80% by weight of the composition.
Claim 6
Dependent Claim
24 words
A composition as in claim 1 wherein the number of thiol groups in the composition exceeds the number of isocyanate groups in the composition.
Claim 7
Dependent Claim
128 words
A composition as in claim 1 wherein the 'ene groups are selected from the group consisting of (i) groups of formulae (a)-(e). ##STR10## where f is an integer of 1-9; and R is a radical selected from the group consisting of hydrogen, fluorine, chlorine, furyl, thienyl, pyridyl, phenyl and substituted phenyl, benzyl and substituted benzyl, alkyl and substituted alkyl, alkoxy and substituted alkoxy, and cycloalkyl and substituted cycloalkyl, wherein the substituents on the substituted members are selected from the group consisting of nitro, chloro, fluoro, acetoxy, acetamide, phenyl, benzyl, alkyl, alkoxy and cycloalkyl, the alkyl and alkoxy groups have from one to nine carbon atoms and the cycloalkyl groups have from three to eight carbon atoms; (ii) unsaturated cycloacetal groups of the formulae: ##STR11## and (iii) styrene groups.
Claim 8
Dependent Claim
15 words
A composition as in claim 6 wherein the 'ene groups are p-vinyl phenol ether groups.
Claim 9
Dependent Claim
21 words
A composition as in claim 4 wherein the respective ranges of constituents are: (i) 15-45% (ii) 25-60% (iii) 10-50% (iv) 0.5-2.5%.
Claim 10
Dependent Claim
19 words
A composition as in claim 1 wherein the respective ranges are: (i) 22-37% (ii) 30-53% (iii) 12-45% (iv) 0.5-2.5%.
References Cited (Backward Citations)
US3661744A
Cited
US4119617A
Cited
US4230740A
Cited
US4333987A
Cited
US4415604A
Cited
US4424252A
Cited
US4451523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-25 | 1990-11-24 | 1991-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-25 | 1994-11-24 | 1995-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-25 | 1998-11-24 | 1999-05-26 | $7700.00 | Window Closed / Lapsed |