US3954494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wax-flux composition containing a succinimide salt of an alkylaryl sulfonic acid for soldering
Assignee: Chevron USA Inc
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Filing: 1974-12-30
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Granted: 1976-05-04
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Expires: 1994-12-30
Abstract
Abstract Wax-flux compositions for use in low-temperature soldering processes comprise (A) a major amount of a wax and (B) an effective amount to cause fluxing, at or below the soldering temperature of the piece to be soldered, of a wax-soluble product obtained by first reacting an aliphatic hydrocarbon-substituted succinic acid or derivative thereof which is capable of forming carboximide bonds with an alkylene polyamine to form a carboximide and then reacting said carboximide with an alkylaryl sulfonic acid. A process for soldering electrical components to a printed circuit board comprises (A) applying a molten wax-flux composition as described above to the metal pattern side of the board, (B) allowing the wax-flux composition to solidify, (C) trimming the components leads, and (D) soldering the components to the printed circuit board.
Inventors
- 👤 Robert A. Stayner
- 👤 Warren Lowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:14
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/3612; B23K35/3613; C; C08; C08K; C08K5/00; C08K5/16; C08K5/34
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
107 words
A wax-flux composition for use in a low-temperature soldering process, comprising: A. a major amount of a wax having an AMP between 40°C and 100°C; and B. an amount effective to cause fluxing, at or below the soldering temperatures, of the piece to be soldered in said process of a wax-soluble product obtained by first reacting a C 20 -C 400 aliphatic hydrocarbon-substituted succinic acid or a derivative thereof which is capable of forming carboximide bonds with a C 2 -C 30 , N 2 -N 10 alkylene polyamine to form a carboximide and then reacting said carboximide with a (C 8 -C 30 alkyl)aryl sulfonic acid.
Claim 2
Dependent Claim
107 words
A wax-flux composition for use in a low-temperature soldering process, comprising: A. a major amount of a wax having an AMP between 40°C and 100°C; and B. an amount effective to cause fluxing, at or below the soldering temperatures, of the piece to be soldered in said process of a wax-soluble product obtained by first reacting a C 20 -C 400 aliphatic hydrocarbon-substituted succinic acid or a derivative thereof which is capable of forming carboximide bonds with a C 2 -C 30 , N 2 -N 10 alkylene polyamine to form a carboximide and then reacting said carboximide with a (C 8 -C 30 alkyl)aryl sulfonic acid.
Claim 3
Dependent Claim
17 words
The wax-flux composition of claim 1 wherein said product is derived from an aliphatic hydrocarbon-substituted succinic anhydride.
Claim 4
Dependent Claim
170 words
The wax-flux composition of claim 2 wherein said wax-soluble product has the formula ##EQU4## wherein X represents: ##EQU5## with at least one X being the latter radical; R 1 and R 4 each independently represent hydrogen or an alkyl containing from 1 to about 5 carbon atoms; A is an alkylene radical containing from 2 to about 6 carbon atoms; y is a number from 0 to 10 such that when A represents ethylene R 1 on adjacent nitrogen atoms may be joined to form ethylene; R 3 represents an alkyl or alkenyl radical of from about 20 to about 400 carbon atoms; Ar represents an aryl group; R 2 represents a wax-solubilizing group containing from 1 to about 22 carbon atoms; n represents a positive integer of from 1 to 3 wherein the total number of carbon atoms contained in all of said R 2 groups is from 8 to about 80 carbon atoms; and z represents a number from 1 up to the number of titratable amine nitrogens.
Claim 5
Dependent Claim
12 words
A wax-flux composition of claim 3 wherein Ar represents phenylene or naphthalene.
Claim 6
Dependent Claim
86 words
A wax-flux composition of claim 3 wherein R 4 represents hydrogen; R 3 is a branched-chain aliphatic radical of from 50 to 200 carbon atoms; A represents alkylene of from 2 to 3 carbon atoms; y represents a positive integer from 0 to 5 when one X is --NH 2 and 1 to 5 when neither X is --NH 2 ; and z represents a number such that the ratio of z to the number of titratable nitrogen atoms is from about 0.9 to about 2.1.
Claim 7
Dependent Claim
19 words
A wax-flux composition of claim 5 wherein said wax-soluble product comprises 1 to 20 weight percent of said composition.
Claim 8
Dependent Claim
22 words
A wax-flux composition of claim 5 wherein said wax-soluble product comprises from about 3 to about 12 weight percent of said composition.
Claim 9
Dependent Claim
26 words
A wax-flux composition of claim 6 wherein Ar represents phenylene, R 2 represents an alkyl containing from 8 to 22 carbon atoms and n equals 1.
Claim 10
Dependent Claim
11 words
A wax-flux composition of claim 8 wherein R 2 represents dodecyl.
Claim 11
Dependent Claim
17 words
A wax-flux composition of claim 9 wherein said wax has an AMP of from 50°C to 75°C.
Claim 12
Dependent Claim
11 words
A wax-flux composition of claim 8 wherein R 2 represents tetrapropylene.
Claim 13
Dependent Claim
16 words
A wax-flux composition of claim 11 wherein said wax has an AMP of 50°C to 75°C.
References Cited (Backward Citations)
FR1598564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-04 | 1979-11-03 | 1980-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-04 | 1983-11-03 | 1984-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-04 | 1987-11-03 | 1988-05-04 | $7700.00 | Window Closed / Lapsed |