US4194931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soldering flux
Assignee: AT&T Inc
•
Filing: 1978-11-02
•
Granted: 1980-03-25
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Expires: 1998-11-02
Abstract
Abstract A soldering flux is disclosed. The soldering flux comprises a mixture comprising rosin, an activator having at least one halogen atom and at least one destabilizing substituent and an acid solder surfactant selected from the polybasic carboxylic acid, a hydroxyl substituent thereof, a keto acid and a mixture of any of the foregoing surfactants.
Inventors
- 👤 Frank M. Zado
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:58
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/3612; B23K35/3613
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
77 words
A method of soldering a metal which comprises: applying to a surface a soldering flux comprising a rosin mixture of (a) rosin; (b) an activator having at least one halogen atom and at least one destabilizing substituent; and (c) a surfactant selected from the group consisting of (a") a polycarboxylic acid, (b") a hydroxyl substituent of (a"), (c") a keto acid and (d") a mixture of any of the foregoing surfactants, to form a flux treated surface.
Claim 2
Independent Claim
77 words
A method of soldering a metal which comprises: applying to a surface a soldering flux comprising a rosin mixture of (a) rosin; (b) an activator having at least one halogen atom and at least one destabilizing substituent; and (c) a surfactant selected from the group consisting of (a") a polycarboxylic acid, (b") a hydroxyl substituent of (a"), (c") a keto acid and (d") a mixture of any of the foregoing surfactants, to form a flux treated surface.
Claim 3
Dependent Claim
61 words
The method as defined in claim 1 wherein: said activator comprises a halogen substituted carboxylic acid selected from the group consisting of a monobasic acid having 12 to 18 carbon atoms, a dibasic acid having 4 to 10 carbon atoms and a mixture thereof; and said polycarboxylic acid surfactant and said hydroxyl substituent thereof each comprise 4 to 10 carbon atoms.
Claim 4
Dependent Claim
42 words
The method as defined in claim 1 wherein said surfactant comprises a polybasic acid selected from the group consisting of a dicarboxylic acid having at least 4 carbon atoms, a tricarboxylic acid having 6 to 7 carbon atoms and a mixture thereof.
Claim 5
Dependent Claim
19 words
The method as defined in claim 1 wherein said rosin mixture comprises rosin, a dibromosuccinic acid and adipic acid.
Claim 6
Dependent Claim
15 words
The method as defined in claim 4 wherein said rosin mixture further comprises levulinic acid.
Claim 7
Dependent Claim
46 words
The method as defined in claim 1 wherein said rosin mixture comprises said activator in an amount ranging from about 0.3 to about 7 weight percent, said surfactant in an amount ranging from about 1 to about 49.7 weight percent and a remainder of said rosin.
Claim 8
Dependent Claim
20 words
The method as defined in claim 1 wherein said rosin mixture is combined with a secondary activator comprising an organohydrohalide.
Claim 9
Dependent Claim
19 words
The method as defined in claim 7 wherein said solder flux comprises a liquid carrier and a foaming expedient.
Claim 10
Dependent Claim
19 words
The method as defined in claim 1 which further comprises applying a solder alloy to said flux treated surface.
Claim 11
Dependent Claim
78 words
An additive for a rosin flux which comprises: an activator having at least one halogen atom and at least one destabilizing substituent selected from the group consisting of (a') the carboxyl group, (b') the aryl group, (c') the carbonyl group and (d') the halogen atom; and a surfactant selected from the group consisting of (a") a polycarboxylic acid, (b") a hydroxyl substituent of (a"), (c") a keto acid and (d") a mixture of any of the foregoing surfactants.
Claim 12
Dependent Claim
78 words
An additive for a rosin flux which comprises: an activator having at least one halogen atom and at least one destabilizing substituent selected from the group consisting of (a') the carboxyl group, (b') the aryl group, (c') the carbonyl group and (d') the halogen atom; and a surfactant selected from the group consisting of (a") a polycarboxylic acid, (b") a hydroxyl substituent of (a"), (c") a keto acid and (d") a mixture of any of the foregoing surfactants.
Claim 13
Dependent Claim
16 words
The additive as defined in claim 10 which further comprises a secondary activator comprising an organohalohydride.
Claim 14
Dependent Claim
16 words
The additive as defined in claim 10 wherein said activator comprises a halogen substituted carboxylic acid.
Claim 15
Dependent Claim
41 words
The additive as defined in claim 10 wherein said surfactant comprises a polycarboxylic acid selected from the group consisting of dicarboxylic acid having at least 4 carbon atoms, a tricarboxylic acid having 6 to 7 carbon atoms and a mixture thereof.
Claim 16
Dependent Claim
15 words
The additive as defined in claim 10 which comprises a dibromosuccinic acid and adipic acid.
Claim 17
Dependent Claim
12 words
The additive as defined in claim 14 which further comprises levulinic acid.
Claim 18
Dependent Claim
21 words
The additive as defined in claim 11 which comprises azelaic acid, a dibromostyrene activator and a secondary activator comprising diethylamine hydrochloride.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-03-25 | 1983-09-24 | 1984-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-25 | 1987-09-24 | 1988-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-25 | 1991-09-24 | 1992-03-25 | $7700.00 | Window Closed / Lapsed |