Patent US4290928A successfully refreshed from Google Patents.
US4290928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Binder for dry hot coat foundry process
Assignee: Sumitomo Durez Co Ltd
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Filing: 1980-03-21
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Granted: 1981-09-22
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Expires: 2000-03-21
Abstract
Abstract A lubricant-containing binder for the dry hot coat foundry method comprising a solid resol type phenolic resin and a lubricant in an amount of about 0.5 to 10 percent by weight with respect to said phenolic resin.
Inventors
- 👤 Kyohei Funabiki
- 👤 Noriaki Matsushima
- 👤 Naomitsu Inouye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:43
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2233; B22C1/2246; B22C1/2253; C; C08; C08G; C08G8/00; C08G8/04; C08G8/08; C08G8/10; C08L; C08L61/00; C08L61/04; C08L61/06
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
82 words
A lubricant-containing binder for the dry hot coat foundry method consisting essentially of a solid resol-type phenolic resin produced by the reaction comprising condensation of reactants consisting of a phenol and a formaldehyde source followed by dehydration of the reaction mixture, and a lubricant in an amount of about 0.5 to 10 percent by weight with respect to said phenolic resin, wherein said lubricant is added prior to or during the course of the reaction to produce said solid resol-type phenolic resin.
Claim 2
Dependent Claim
82 words
A lubricant-containing binder for the dry hot coat foundry method consisting essentially of a solid resol-type phenolic resin produced by the reaction comprising condensation of reactants consisting of a phenol and a formaldehyde source followed by dehydration of the reaction mixture, and a lubricant in an amount of about 0.5 to 10 percent by weight with respect to said phenolic resin, wherein said lubricant is added prior to or during the course of the reaction to produce said solid resol-type phenolic resin.
Claim 3
Dependent Claim
29 words
A binder according to claim 1 wherein said lubricant is added after the condensation step but before the dehydration step of the reaction to produce the resol-type phenolic resin.
Claim 4
Dependent Claim
28 words
A binder according to claim 2 comprising said lubricant in an amount of about 1 to 7 percent by weight with respect to said solid resol-type phenolic resin.
Claim 5
Dependent Claim
24 words
A binder according to claim 4 wherein said lubricant is added and melted during the course of reaction of said solid resol-type phenolic resin.
Claim 6
Dependent Claim
12 words
A binder according to claim 5 wherein said lubricant is a dispersion.
Claim 7
Dependent Claim
21 words
A binder according to claim 5 wherein said lubricant is ethylene bis-stearyl amide, methylene bis-stearyl amide, oxystearyl amide or stearyl amide.
Claim 8
Dependent Claim
12 words
A binder according to claim 6 wherein said lubricant is polyethylene wax.
Claim 9
Dependent Claim
19 words
A binder according to claim 7 wherein the reaction catalyst for said resol-type phenolic resin is an amine catalyst.
Claim 10
Dependent Claim
28 words
A binder according to claim 8 wherein the reaction catalyst for said solid resol-type phenolic resin is a combination of an amine catalyst and an alkali metal catalyst.
Claim 11
Dependent Claim
19 words
A binder according to claim 9 wherein a silane coupling agent is added to said solid resol-type phenolic resin.
Claim 12
Dependent Claim
96 words
A process for producing resin-coated sand for use in a shell mold which comprises coating heated sand particles with a lubricant containing binder comprising a solid resol-type phenolic resin produced by the reaction comprising condensation of reactants consisting of a phenol and a formaldehyde source followed by dehydration of the reaction mixture, and a lubricant in an amount of about 0.5 to 10 percent by weight with respect to said phenolic resin, wherein said lubricant is added after the condensation step, but before the dehydration step of the reaction to produce said solid resol-type phenolic resin.
Claim 13
Dependent Claim
96 words
A process for producing resin-coated sand for use in a shell mold which comprises coating heated sand particles with a lubricant containing binder comprising a solid resol-type phenolic resin produced by the reaction comprising condensation of reactants consisting of a phenol and a formaldehyde source followed by dehydration of the reaction mixture, and a lubricant in an amount of about 0.5 to 10 percent by weight with respect to said phenolic resin, wherein said lubricant is added after the condensation step, but before the dehydration step of the reaction to produce said solid resol-type phenolic resin.
Claim 14
Dependent Claim
44 words
A process for producing resin-coated sand according to claim 11 wherein said lubricant-containing solid resol-type phenolic resin is prepared by adding a dispersion of a lubricant after the condensation step, but before the dehydration step, of the reaction to produce said resol-type phenolic resin.
Claim 15
Dependent Claim
25 words
A process for producing resin-coated sand according to claim 12 wherein said lubricant is ethylene bis-stearyl amide, methylene bis-stearyl amide, oxystearyl amide or stearyl amide.
Claim 16
Dependent Claim
16 words
A process for producing resin-coated sand according to claim 12 wherein said lubricant is polyethylene wax.
Claim 17
Dependent Claim
34 words
A process for producing resin-coated sand according to claim 14 wherein said lubricant is employed in an amount of about 0.5 to 10 percent by weight with respect to said solid resol-type phenolic resin.
Claim 18
Dependent Claim
33 words
A process for producing resin-coated sand according to claim 15 wherein the reaction catalyst for said lubricant-containing solid resol-type phenolic resin is a combination of an amine catalyst and an alkali metal catalyst.
Claim 19
Dependent Claim
11 words
A foundry sand composition produced by the process of claim 11.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-21 | 1985-03-23 | 1985-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-21 | 1989-03-23 | 1989-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-21 | 1993-03-23 | 1993-09-22 | $7700.00 | Window Closed / Lapsed |