US4468486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated sand and method for producing
Assignee: Sumitomo Durez Co Ltd
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Filing: 1982-11-02
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Granted: 1984-08-28
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Expires: 2002-11-02
Abstract
Abstract A resin coated sand for shell-molding processes is provided comprising the coating of foundry sand or aggregates with a phenolic resin and a carboxylic acid salt. The carboxylic acid salt is selected from a carboxylic acid salt of an element selected from groups Ia, Ib, IIa, IIb, IIIa, IVa, Va, VIb, VIIa, VIIb or VIII of the Periodic Table of Elements. The proportion of carboxylic acid salt to phenolic resin is from 0.5 to 40 parts carboxylic acid salt to 100 parts phenolic resin. This resin coated sand produces shell-molds having excellent properties for casting, and allows the molded article to be removed in an easy and efficient manner.
Inventors
- 👤 Noriaki Matsushima
- 👤 Yukio Saeki
- 👤 Yukio Tokunaga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:12
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2233; B22C1/2246; B22C1/2253; C08L; C08L61/00; C08L61/04; C08L61/06; C08L33/00; C08L33/02
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
91 words
Resin coated sand for shell-molding operations comprising foundry aggregates coated with a phenolic resin and a carboxylic acid salt of an element selected from groups Ia, Ib, IIa, IIb, IIIa, IVa, Va, VIb, VIIb, or VIII of the Periodic Table of Elements, wherein the carboxylic acid salt is selected from formate, acetate, butyrate, benzoate, salicylate, fumarate, oxalate, acrylate, polyacrylate, methacrylate, polymethacrylate, adipate, lactate, citrate or succinate, and the ratio of carboxylic acid salt to phenolic resin is from about 0.5 to about 40 parts by weight to 100 parts phenolic resin.
Claim 2
Dependent Claim
91 words
Resin coated sand for shell-molding operations comprising foundry aggregates coated with a phenolic resin and a carboxylic acid salt of an element selected from groups Ia, Ib, IIa, IIb, IIIa, IVa, Va, VIb, VIIb, or VIII of the Periodic Table of Elements, wherein the carboxylic acid salt is selected from formate, acetate, butyrate, benzoate, salicylate, fumarate, oxalate, acrylate, polyacrylate, methacrylate, polymethacrylate, adipate, lactate, citrate or succinate, and the ratio of carboxylic acid salt to phenolic resin is from about 0.5 to about 40 parts by weight to 100 parts phenolic resin.
Claim 3
Dependent Claim
35 words
Resin coated sand according to claim 1, wherein said acetate salt is selected from cobalt acetate, manganese acetate, magnesium acetate, calcium acetate, zinc acetate, lead acetate, sodium acetate, potassium acetate, copper acetate or barium acetate.
Claim 4
Dependent Claim
16 words
Resin coated sand according to claim 2, wherein said phenolic resin is a novolac phenolic resin.
Claim 5
Dependent Claim
16 words
Resin coated sand according to claim 2, wherein said phenolic resin is a resole phenolic resin.
Claim 6
Dependent Claim
23 words
Resin coated sand according to claim 2, wherein said phenolic resin is a mixture of the novolac and the resole of phenolic resins.
Claim 7
Dependent Claim
19 words
Resin coated sand according to claim 1, wherein said formate salt is selected from sodium formate or nickel formate.
Claim 8
Dependent Claim
16 words
Resin coated sand according to claim 6, wherein said phenolic resin is a novolac phenolic resin.
Claim 9
Dependent Claim
16 words
Resin coated sand according to claim 6, wherein said phenolic resin is a resole phenolic resin.
Claim 10
Dependent Claim
23 words
Resin coated sand according to claim 6, wherein said phenolic resin is a mixture of the novolac and the resole of phenolic resins.
Claim 11
Dependent Claim
21 words
Resin coated sand according to claim 1, wherein said oxalate salt is selected from sodium oxalate, potassium oxalate or oxalic chloride.
Claim 12
Dependent Claim
16 words
Resin coated sand according to claim 10, wherein said phenolic resin is a novolac phenolic resin.
Claim 13
Dependent Claim
16 words
Resin coated sand according to claim 10, wherein said phenolic resin is a resole phenolic resin.
Claim 14
Dependent Claim
23 words
Resin coated sand according to claim 10, wherein said phenolic resin is a mixture of the novolac and the resole of phenolic resins.
Claim 15
Dependent Claim
16 words
Resin coated sand according to claim 1, wherein said phenolic resin is a novolac phenolic resin.
Claim 16
Dependent Claim
11 words
Resin coated sand according to claim 14, further comprising a lubricant.
Claim 17
Dependent Claim
16 words
Resin coated sand according to claim 1, wherein said phenolic resin is a resole phenolic resin.
Claim 18
Dependent Claim
11 words
Resin coated sand according to claim 16, further comprising a lubricant.
Claim 19
Dependent Claim
23 words
Resin coated sand according to claim 1, wherein said phenolic resin is a mixture of the novolac and the resole of phenolic resins.
Claim 20
Dependent Claim
11 words
Resin coated sand according to claim 18, further comprising a lubricant.
Claim 21
Dependent Claim
11 words
Resin coated sand according to claim 1, further comprising a lubricant.
Claim 22
Independent Claim
99 words
A method for producing resin coated sand for shell-molding operations having improved shake-out properties comprising coating foundry aggregates with phenolic resin and a carboxylic acid salt of an element selected from groups Ia, Ib, IIa, IIb, IIIa, IVa, Va, VIb, VIIa, VIIb or VIII of the Periodic Table of Elements, wherein said carboxylic acid is selected from formate, acetate, butyrate, benzoate, salicylate, fumarate, oxalate, acrylate, polyacrylate, methacrylate, polymethacrylate, adipate, lactate, citrate or succinate, and the ratio of carboxylic acid salt to phenolic resin is from about 0.5 to about 40 parts carboxylic acid salt to 100 parts phenolic resin.
Claim 23
Independent Claim
99 words
A method for producing resin coated sand for shell-molding operations having improved shake-out properties comprising coating foundry aggregates with phenolic resin and a carboxylic acid salt of an element selected from groups Ia, Ib, IIa, IIb, IIIa, IVa, Va, VIb, VIIa, VIIb or VIII of the Periodic Table of Elements, wherein said carboxylic acid is selected from formate, acetate, butyrate, benzoate, salicylate, fumarate, oxalate, acrylate, polyacrylate, methacrylate, polymethacrylate, adipate, lactate, citrate or succinate, and the ratio of carboxylic acid salt to phenolic resin is from about 0.5 to about 40 parts carboxylic acid salt to 100 parts phenolic resin.
Claim 24
Dependent Claim
22 words
A method for producing resin coated sand according to claim 21, wherein said formate is selected from sodium formate and nickel formate.
Claim 25
Dependent Claim
18 words
A method for preparing resin coated sand according to claim 22, wherein the phenolic resin is a novolac.
Claim 26
Dependent Claim
20 words
A method for preparing resin coated sand according to claim 22, wherein the phenolic resin is a resole phenolic resin.
Claim 27
Dependent Claim
25 words
A method for preparing resin coated sand according to claim 22, wherein the phenolic resin is a mixture of resole and novolac of phenolic resins.
Claim 28
Dependent Claim
18 words
A method for preparing resin coated sand according to claim 22, wherein said phenolic resin contains a lubricant.
Claim 29
Dependent Claim
40 words
A method for producing resin coated sand according to claim 21, wherein said acetate is selected from cobald acetate, manganese acetate, nickel acetate, magnesium acetate, calcium acetate, zinc acetate, lead acetate, sodium acetate, potassium acetate, copper acetate and barium acetate.
Claim 30
Dependent Claim
18 words
A method for preparing resin coated sand according to claim 27, wherein the phenolic resin is a novolac.
Claim 31
Dependent Claim
20 words
A method for preparing resin coated sand according to claim 27, wherein the phenolic resin is a resole phenolic resin.
Claim 32
Dependent Claim
25 words
A method for preparing resin coated sand according to claim 27, wherein the phenolic resin is a mixture of resole and novolac of phenolic resins.
Claim 33
Dependent Claim
18 words
A method for preparing resin coated sand according to claim 27, wherein said phenolic resin contains a lubricant.
Claim 34
Dependent Claim
24 words
A method for producing resin coated sand according to claim 21, wherein said oxalate is selected from sodium oxalate, potassium oxalate and oxalic chloride.
Claim 35
Dependent Claim
18 words
A method for preparing resin coated sand according to claim 32, wherein the phenolic resin is a novolac.
Claim 36
Dependent Claim
20 words
A method for preparing resin coated sand according to claim 32, wherein the phenolic resin is a resole phenolic resin.
Claim 37
Dependent Claim
25 words
A method for preparing resin coated sand according to claim 32, wherein the phenolic resin is a mixture of resole and novolac of phenolic resins.
Claim 38
Dependent Claim
18 words
A method for preparing resin coated sand according to claim 32, wherein said phenolic resin contains a lubricant.
Claim 39
Dependent Claim
20 words
A method for preparing resin coated sand according to claim 21, wherein the phenolic resin is a novolac phenolic resin.
Claim 40
Dependent Claim
20 words
A method for preparing resin coated sand according to claim 21, wherein the phenolic resin is a resole phenolic resin.
Claim 41
Dependent Claim
25 words
A method for preparing resin coated sand according to claim 21, wherein the phenolic resin is a mixture of resole and novolac of phenolic resins.
Claim 42
Dependent Claim
18 words
A method for preparing resin coated sand according to claim 21, wherein said phenolic resin contains a lubricant.
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) | 1987-08-28 | 1988-02-27 | 1988-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-28 | 1992-02-27 | 1992-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-28 | 1996-02-27 | 1996-08-28 | $7700.00 | Window Closed / Lapsed |