US3886099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water soluble flux remover
Assignee: GRIFFIN BROS Inc
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Filing: 1973-11-12
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Granted: 1975-05-27
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Expires: 1993-11-12
Abstract
Abstract A water soluble flux remover for removing soldering flux from electrical circuit boards and the like comprises a glycol ether, a saturated aliphatic amine, a surfactant, and a nonvolatile water soluble organic acid having a chelating radical. This composition has the ability to solublize rosin fluxes and the composition is biodegradable so that after removal of the fluxes the solution can be discharged into ordinary waste treatment systems.
Inventors
- 👤 Robert M Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:12
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/20; C11D3/2068; C11D3/2075; C11D3/2086; C11D3/26; C11D3/30; C11D3/43
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
165 words
A WATER SOLUBLE SOLUTION FOR REMOVING SOLDERING FLUX FROM CIRCUIT BOARDS CONSISTING ESSENTIALLY OF: A GLYCOL ETHER SELECTED FROM THE GROUP CONSISTING OF ETHYLENE GLYCOL MONO METHYL ETHER, ETHYLENE GLYCOL ETHYLETHER, ETHYLENE GLYCOL MONO BUTYL ETHER, DIETHYLENE GLYCOL MONO METHYL ETHER, DIETHYLENE GLYCOL MONO ETHYL ETHER AND DIETHYLENE GLYCOL MONO BUTYL ETHER AND MIXTURES THEREOF; AN AMINE SELECTED FROM THE GROUP CONSISTING OF TRIETHANOL AMINE, DIETHANOL AMINE, MONOETHANOL AMINE AND MORPHOLINE; AN ORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF CITRIC ACID, GLUCONIC ACID AND HYDROXYACETIC ACID, THERE BEING AT LEAST ABOUT 3 MOLS OF SAID AMINE PRESENT FOR EACH MOL OF SAID ORGANIC ACID; SAID GLYCOL ETHER, AMINE AND ORGANIC ACID BEING DISSOLVED IN WATER TO FORM A CONCENTRATE AND BEING PRESENT IN SAID CONCENTRATE IN PROPORTIONS WHICH, UPON DILUTION OF SAID CONCENTRATE WITH WATER, WILL PROVIDE A WASHING SOLUTION CONTAIING BY WEIGHT APPROXIMATELY 1 TO 3% OF SAID GLYCOL ETHER, 1 TO 3% OF SAID AMINE AND 0.18 TO 0.56% OF SAID ACID.
Claim 2
Dependent Claim
165 words
A WATER SOLUBLE SOLUTION FOR REMOVING SOLDERING FLUX FROM CIRCUIT BOARDS CONSISTING ESSENTIALLY OF: A GLYCOL ETHER SELECTED FROM THE GROUP CONSISTING OF ETHYLENE GLYCOL MONO METHYL ETHER, ETHYLENE GLYCOL ETHYLETHER, ETHYLENE GLYCOL MONO BUTYL ETHER, DIETHYLENE GLYCOL MONO METHYL ETHER, DIETHYLENE GLYCOL MONO ETHYL ETHER AND DIETHYLENE GLYCOL MONO BUTYL ETHER AND MIXTURES THEREOF; AN AMINE SELECTED FROM THE GROUP CONSISTING OF TRIETHANOL AMINE, DIETHANOL AMINE, MONOETHANOL AMINE AND MORPHOLINE; AN ORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF CITRIC ACID, GLUCONIC ACID AND HYDROXYACETIC ACID, THERE BEING AT LEAST ABOUT 3 MOLS OF SAID AMINE PRESENT FOR EACH MOL OF SAID ORGANIC ACID; SAID GLYCOL ETHER, AMINE AND ORGANIC ACID BEING DISSOLVED IN WATER TO FORM A CONCENTRATE AND BEING PRESENT IN SAID CONCENTRATE IN PROPORTIONS WHICH, UPON DILUTION OF SAID CONCENTRATE WITH WATER, WILL PROVIDE A WASHING SOLUTION CONTAIING BY WEIGHT APPROXIMATELY 1 TO 3% OF SAID GLYCOL ETHER, 1 TO 3% OF SAID AMINE AND 0.18 TO 0.56% OF SAID ACID.
Claim 3
Dependent Claim
29 words
A solution as set forth in claim 1 wherein said glycol ether is ethylene glycol mono butyl ether and is in substantially equal proportion to said amine by weight.
Claim 4
Dependent Claim
34 words
The solution of claim 1 in which said concentrate also contains a polyoxyethylene surfactant in an amount which will result in such washing solution containing approximately 0.05 to 0.15% by weight of said surfactant.
Claim 5
Dependent Claim
47 words
The solution of claim 1 in which said concentrate also contains a lower alcohol selected from the group consisting of methyl alcohol, ethyl alcohol and isopropyl alcohol in an amount which will result in said washing solution containing approximately 0.25 to 0.75% by weight of said alcohol.
Claim 6
Dependent Claim
34 words
The solution of claim 4 in which said concentrate also contains a polyoxyethylene surfactant in an amount which will result in said washing solution containing approximately 0.05 to 0.15% by weight of said surfactant.
Claim 7
Dependent Claim
12 words
The solution of claim 5 in which the acid is hydroxyacetic acid.
Claim 8
Dependent Claim
12 words
The solution of claim 6 in which the amine is monoethanol amine.
Claim 9
Dependent Claim
16 words
The solution of claim 7 in which the glycol ether is ethylene glycol mono butyl ether.
Claim 10
Dependent Claim
23 words
A washing solution concentrate dilutable with water to form a washing solution for removing flux from circuit boards, said concentrate consisting essentially of:
Claim 11
Dependent Claim
23 words
A washing solution concentrate dilutable with water to form a washing solution for removing flux from circuit boards, said concentrate consisting essentially of:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |