US4312671A
Expired / Lapsed
US
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Process for the preparation of a conglomerate sand ANF product
Assignee: Produits Ballu-Schuiling SA
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Filing: 1980-04-29
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Granted: 1982-01-26
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Expires: 2000-04-29
Abstract
Abstract Process for the preparation of a foundry sand and the foundry sand composition which consists in mixing magnesium silicate and an arylsulphonic acid in aqueous medium as the binder.
Inventors
- 👤 Paul H. R. Williame
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:26
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; C; C04; C04B; C04B28/00; C04B28/28
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
73 words
In a process for preparing conglomerate sand by mixing a sand with a setting-binder agent, the improvement comprising as said setting-binder agent the reaction product of magnesium silicate and an arylsulphonic acid in aqueous medium, said magnesium silicate being present in an amount of at least 5% by weight based on said sand and said arylsulphonic acid being present in an amount of at least 25% by weight based on said magnesium silicate.
Claim 2
Dependent Claim
73 words
In a process for preparing conglomerate sand by mixing a sand with a setting-binder agent, the improvement comprising as said setting-binder agent the reaction product of magnesium silicate and an arylsulphonic acid in aqueous medium, said magnesium silicate being present in an amount of at least 5% by weight based on said sand and said arylsulphonic acid being present in an amount of at least 25% by weight based on said magnesium silicate.
Claim 3
Dependent Claim
20 words
The process of claim 1, wherein the arylsulphonic acid represents at least 50% of the weight of the magnesium silicate.
Claim 4
Dependent Claim
18 words
The process of claim 1 wherein water represents at least 25% of the weight of the arylsulphonic acid.
Claim 5
Dependent Claim
19 words
The process of claim 3, wherein water represents from 40 to 100% of the weight of the arylsulphonic acid.
Claim 6
Dependent Claim
15 words
The process of claim 3, wherein the arylsulphonic acid is added as an aqueous solution.
Claim 7
Dependent Claim
16 words
The process of claim 1 which consists in adding to the arylsulphonic acid a strong acid.
Claim 8
Dependent Claim
20 words
The process of claim 6, wherein the strong acid represents less than 15% of the weight of the arylsulphonic acid.
Claim 9
Dependent Claim
12 words
The process of claim 1, wherein the arylsulphonic acid is paratoluenesulphonic acid.
Claim 10
Dependent Claim
14 words
The process of claim 1, wherein the magnesium silicate is of the olivine group.
Claim 11
Dependent Claim
11 words
The process of claim 1, wherein said conglomerate sand is resin-free.
Claim 12
Dependent Claim
20 words
A self-hardening foundry composition comprising sand and, as a setting-binder agent, at least 5% by weight of a magnesium arylsulphonate.
Claim 13
Dependent Claim
20 words
A self-hardening foundry composition comprising sand and, as a setting-binder agent, at least 5% by weight of a magnesium arylsulphonate.
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) | 1985-01-25 | 1985-07-27 | 1986-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-25 | 1989-07-27 | 1990-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-25 | 1993-07-27 | 1994-01-26 | $7700.00 | Window Closed / Lapsed |