Patent US4194915A successfully refreshed from Google Patents.
US4194915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foundry mold and core wash additives
Assignee: Baroid Technology Inc
•
Filing: 1978-01-03
•
Granted: 1980-03-25
•
Expires: 1998-01-03
Abstract
Abstract Additives useful in producing foundry mold and core washes comprise either: a mixture of 66.75% to 80.05% of an organophilic clay and 19.95% to 33.25% of an alcohol soluble, hexane insoluble thermoplastic resin skin-forming agent; or 7.15% to 15.25% of an organophilic clay, 2.85% to 4.75% of the skin forming agent, and 80% to 90% of a refractory material having a particle size fo 200 mesh or finer.
Inventors
- 👤 Roderick B. Perkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:02
CPC Classifications
B; B22; B22C; B22C3/00
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
54 words
A foundry mold and core wash additive comprising from 66.75% to 80.05% of an organophilic clay selected from the group consisting of organophilic hectorite, organophilic montmorillonite, organophilic attapulgite, and mixtures thereof, and from 19.95% to 33.25% of a skin-forming agent, said agent being an alcohol soluble, hexane insoluble thermoplastic resin derived from pine wood.
Claim 2
Dependent Claim
54 words
A foundry mold and core wash additive comprising from 66.75% to 80.05% of an organophilic clay selected from the group consisting of organophilic hectorite, organophilic montmorillonite, organophilic attapulgite, and mixtures thereof, and from 19.95% to 33.25% of a skin-forming agent, said agent being an alcohol soluble, hexane insoluble thermoplastic resin derived from pine wood.
Claim 3
Dependent Claim
82 words
The additive of claim 1 wherein said thermoplastic resin has a softening point in the range from about 100° C. to 120° C., an acid number in the range from about 90 to about 100, an average molecular weight in the range from 480 to 510, a hydroxyl content as determined by acetylation in the range from 5% to 6%, a methoxyl content in the range from 4.5% to 5.5%, and an unsaponifiable matter content in the range from 7.0% to 8.5%.
Claim 4
Dependent Claim
54 words
The additive of claim 1 wherein said thermoplastic resin has a softening point in the range from 110° C. to 115° C., an acid number of 95, an average molecular weight of 495, a hydroxyl content as determined by acetylation of 5.5%, a methoxyl content of 5.1%, and an unsaponifiable matter content of 7.7%.
Claim 5
Dependent Claim
12 words
The additive of claim 1 wherein said organophilic clay is organophilic attapulgite.
Claim 6
Dependent Claim
13 words
The additive of claim 1 wherein said organophilic clay is dimethyldihydrogenatedtallow ammonium attapulgite.
Claim 7
Dependent Claim
12 words
The additive of claim 2 wherein said organophilic clay is organophilic attapulgite.
Claim 8
Dependent Claim
13 words
The additive of claim 2 wherein said organophilic clay is dimethyldihydrogenatedtallow ammonium attapulgite.
Claim 9
Dependent Claim
12 words
The additive of claim 3 wherein said organophilic clay is organophilic attapulgite.
Claim 10
Dependent Claim
13 words
The additive of claim 3 wherein said organophilic clay is dimethyldihydrogenatedtallow ammonium attapulgite.
Claim 11
Dependent Claim
71 words
A foundry mold and core wash additive comprising from 7.15% to 15.25% of an organophilic clay selected from the group consisting of organophilic hectorite, organophilic montmorillonite, organophilic attapulgite, and mixtures thereof, from 2.85% to 4.75% of a skin-forming agent, said agent being an alcohol soluble, hexane insoluble thermoplastic resin derived from pine wood, and from 80% to 90% of a refractory material having a particle size of 200 mesh or finer.
Claim 12
Dependent Claim
71 words
A foundry mold and core wash additive comprising from 7.15% to 15.25% of an organophilic clay selected from the group consisting of organophilic hectorite, organophilic montmorillonite, organophilic attapulgite, and mixtures thereof, from 2.85% to 4.75% of a skin-forming agent, said agent being an alcohol soluble, hexane insoluble thermoplastic resin derived from pine wood, and from 80% to 90% of a refractory material having a particle size of 200 mesh or finer.
Claim 13
Dependent Claim
30 words
The additive of claim 10 wherein said refractory material is selected from the group consisting of zircon flour, silica flour, chromite flour, olivine flour, ground alumina, graphite and mixtures thereof.
Claim 14
Dependent Claim
83 words
The additive of claim 11 wherein said thermoplastic resin has a softening point in the range from about 100° C. to about 120° C., an acid number in the range from about 90 to about 100, an average molecular weight in the range from 480 to 510, a hydroxyl content as determined by acetylation in the range from 5% to 6%, a methoxyl content in the range from 4.5% to 5.5%, and an unsaponifiable matter content in the range from 7.0% to 8.5%.
Claim 15
Dependent Claim
54 words
The additive of claim 11 wherein said thermoplastic resin has a softening point in the range from 110° C. to 115° C., an acid number of 95, an average molecular weight of 495, a hydroxyl content as determined by acetylation of 5.5%, a methoxyl content of 5.1%, and an unsaponifiable matter content of 7.7%.
Claim 16
Dependent Claim
12 words
The additive of claim 11 wherein said organophilic clay is organophilic attapulgite.
Claim 17
Dependent Claim
13 words
The additive of claim 11 wherein said organophilic clay is dimethyldihydrogenatedtallow ammonium attapulgite.
Claim 18
Dependent Claim
12 words
The additive of claim 12 wherein said organophilic clay is organophilic attapulgite.
Claim 19
Dependent Claim
13 words
The additive of claim 12 wherein said organophilic clay is dimethyldihydrogenatedtallow ammonium attapulgite.
Claim 20
Dependent Claim
12 words
The additive of claim 13 wherein said organophilic clay is organophilic attapulgite.
Claim 21
Dependent Claim
13 words
The additive of claim 13 wherein said organophilic clay is dimethyldihydrogenatedtallow ammonium attapulgite.
Claim 22
Dependent Claim
83 words
The additive of claim 10 wherein said refractory material is selected from the group consisting of zircon flour, crystalline graphite, and mixtures thereof, said organophilic clay is dimethyldihydrogenatedtallow ammonium attapulgite, and said skin-forming agent is a thermoplastic resin having a softening point in the range from 110° C. to 115° C., an acid number of 95, an average molecular weight of 495, a hydroxyl content as determined by acetylation of 5.5%, a methoxyl content of 5.1%, and an unsaponifiable matter content of 7.7%.
Claim 23
Dependent Claim
69 words
A foundry mold and core wash additive comprising from 7.15% to 80.05% of an organophilic clay selected from the group consisting of organophilic hectorite, organophilic montmorillonite, organophilic attapulgite, and mixtures thereof, from 2.85% to 33.25% of a skin-forming agent, said agent being an alcohol soluble, hexane insoluble thermoplastic resin derived from pine wood, and from 0-90% of a refractory material having a particle size of 200 mesh or finer.
Claim 24
Dependent Claim
69 words
A foundry mold and core wash additive comprising from 7.15% to 80.05% of an organophilic clay selected from the group consisting of organophilic hectorite, organophilic montmorillonite, organophilic attapulgite, and mixtures thereof, from 2.85% to 33.25% of a skin-forming agent, said agent being an alcohol soluble, hexane insoluble thermoplastic resin derived from pine wood, and from 0-90% of a refractory material having a particle size of 200 mesh or finer.
Claim 25
Dependent Claim
32 words
The additive of claim 21 wherein said refractory material is selected from the group consisting of zircon, silica, chromite, alumina, graphite, and mixtures thereof, and wherein said organophilic clay is organophilic attapulgite.
Claim 26
Dependent Claim
13 words
The additive of claim 22 wherein said organophilic attapulgite is dimethyldihydrogenatedtallow ammonium attapulgite.
Claim 27
Dependent Claim
67 words
The additive of claim 23 wherein said resin has a softening point in the range from 100° C.-120° C., an acid number in the range from about 90 to 100, an average molecular weight in the range from 480 to 510, a hydroxyl content as determined by acetylation in the range from 4.5% to 5.5%, and an unsaponifiable matter content in the range from 7.0% to 8.5%.
Claim 28
Dependent Claim
19 words
A foundry mold and core wash comprising a suspension of the additive of claim 1 in an organic solvent.
Claim 29
Dependent Claim
10 words
The wash of claim 25 wherein said solvent is isopropanol.
Claim 30
Dependent Claim
19 words
A foundry mold and core wash comprising a suspension of the additive of claim 10 in an organic solvent.
Claim 31
Dependent Claim
10 words
The wash of claim 27 wherein said solvent is isopropanol.
Claim 32
Dependent Claim
17 words
A foundry mold and core wash comprising a suspension of the additive of claim 20 in isopropanol.
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) | 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 |