US4243440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated soft solder bar or ingot
Assignee: Multicore Solders Ltd
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Filing: 1979-05-22
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Granted: 1981-01-06
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Expires: 1999-05-22
Abstract
Abstract Soft solder in the form of an extruded or cast bar or ingot is provided with a coating which prevents formation of surface oxide during storage of the bar or ingot and which acts as an anti-oxidant surface layer when the bar or ingot is used to form a molten solder bath. The coating may also act as a solder flux so that when a solder bath is formed from the soft solder bar or ingot, the anti-oxidant surface layer formed from the coating also acts as a flux composition hence obviating the necessity of employing a separate solder flux in a soldering operation in which the molten solder bath is used. The coating is formed from a coating material essentially comprising a mixture of a neutral ester of a polyhydric alcohol and an ester derivative of rosin or of a modified rosin.
Inventors
- 👤 Gordon F. Arbib
- 👤 Mervin Baranick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:26
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/365; B23K35/3612; B23K35/3618
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
121 words
A soft solder alloy in the form of an extruded or cast bar or ingot substantially completely coated with a coating material essentially comprising: (I) at least one neutral ester selected from the group consisting of an ester derived from a polyhydric alcohol and at least one saturated fatty acid, an ester derived from a polyhydric alcohol and at least one unsaturated fatty acid and an ester derived from a polyhydric alcohol and a monocarboxylic aromatic acid, said ester having a molecular weight of at least 300, and (II) at least one ester selected from the group consisting of an ester derived from a polyhydric alcohol and a rosin and an ester derived from a polyhydric alcohol and a modified rosin.
Claim 2
Dependent Claim
121 words
A soft solder alloy in the form of an extruded or cast bar or ingot substantially completely coated with a coating material essentially comprising: (I) at least one neutral ester selected from the group consisting of an ester derived from a polyhydric alcohol and at least one saturated fatty acid, an ester derived from a polyhydric alcohol and at least one unsaturated fatty acid and an ester derived from a polyhydric alcohol and a monocarboxylic aromatic acid, said ester having a molecular weight of at least 300, and (II) at least one ester selected from the group consisting of an ester derived from a polyhydric alcohol and a rosin and an ester derived from a polyhydric alcohol and a modified rosin.
Claim 3
Dependent Claim
173 words
A soft solder alloy in the form of an extruded or cast bar or ingot substantially completely coated with a coating material essentially comprising: (a) from 50 to 90 weight percent of (I) at least one neutral ester selected from the group consisting of an ester derived from a polyhydric alcohol and at least one saturated fatty acid, an ester derived from a polyhydric alcohol and at least one unsaturated fatty acid and an ester derived from a polyhydric alcohol and a monocarboxylic aromatic acid, said ester having a molecular weight of at least 300; (b) from 5 to 25 weight percent of (II) at least one ester selected from the group consisting of an ester derived from a polyhydric alcohol and a rosin and an ester derived from a polyhydric alcohol and a modified rosin; (c) from 0 to 25 weight percent of a wetting agent selected from aliphatic and aromatic mono- and polycarboxylic acids; and (d) from 0 to 10 weight percent of a toughening agent selected from synthetic thermoplastic materials.
Claim 4
Dependent Claim
173 words
A soft solder alloy in the form of an extruded or cast bar or ingot substantially completely coated with a coating material essentially comprising: (a) from 50 to 90 weight percent of (I) at least one neutral ester selected from the group consisting of an ester derived from a polyhydric alcohol and at least one saturated fatty acid, an ester derived from a polyhydric alcohol and at least one unsaturated fatty acid and an ester derived from a polyhydric alcohol and a monocarboxylic aromatic acid, said ester having a molecular weight of at least 300; (b) from 5 to 25 weight percent of (II) at least one ester selected from the group consisting of an ester derived from a polyhydric alcohol and a rosin and an ester derived from a polyhydric alcohol and a modified rosin; (c) from 0 to 25 weight percent of a wetting agent selected from aliphatic and aromatic mono- and polycarboxylic acids; and (d) from 0 to 10 weight percent of a toughening agent selected from synthetic thermoplastic materials.
Claim 5
Dependent Claim
71 words
The coated solder bar or ingot of claim 2, wherein the ester (I) has a molecular weight in the range from 300 to 3000; the ester (II) is selected from the group consisting of an ester derived from an hydrogenated rosin and an ester derived from a maleic-modified rosin; and the toughening agent is selected from the group consisting of a homopolymer of acrylic acid and a copolymer of acrylic acid.
Claim 6
Dependent Claim
28 words
A coated solder bar or ingot as claimed in claim 3, wherein the ester (I) is derived from a polyhydric alcohol containing from 2 to 8 hydroxyl groups.
Claim 7
Dependent Claim
18 words
A coated solder bar or ingot as claimed in claim 4, wherein the ester (I) is pentaerythritol tetrabenzoate.
Claim 8
Dependent Claim
21 words
A coated solder bar or ingot as claimed in claim 3, wherein the ester (II) is derived from pentaerythritol or glycerol.
Claim 9
Dependent Claim
24 words
A coated solder bar or ingot as claimed in claim 5, wherein the ester (II) is the pentaerythritol ester of a maleic modified rosin.
Claim 10
Dependent Claim
50 words
A method of forming a solder bath for use in the production of electronics equipment, which comprises converting into a molten condition at least one coated soft solder bar or ingot as claimed in claim 1 to form a solder bath the surface of which is substantially free from dross.
Claim 11
Dependent Claim
81 words
A method for forming a solder bath for use in the production of electronics equipment, which comprises converting into a molten condition at least one coated soft solder bar or ingot as claimed in claim 2, the coating material containing said wetting agent, to form a solder bath the surface of which is substantially free from dross and which bath does not require the separate use of a soldering flux in a soft soldering operation in which the bath is employed.
References Cited (Backward Citations)
US3645782A
Cited
US4092182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-06 | 1984-07-07 | 1985-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-06 | 1988-07-07 | 1989-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-06 | 1992-07-07 | 1993-01-06 | $7700.00 | Window Closed / Lapsed |