Patent US4452926A successfully refreshed from Google Patents.
US4452926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resin-coated sand composition and method for producing same
Assignee: Sumitomo Durez Co Ltd
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Filing: 1982-11-05
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Granted: 1984-06-05
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Expires: 2002-11-05
Abstract
Abstract An improved resin binder for shell-molding operations having improved shake-out properties is disclosed. The resin binder utilizes a lubricant-containing phenolic resin of the novolac or resole type, or a mixture of novolac and resole types, incorporated therewith is an organic chloride. The organic chloride is characterized by having 20% by weight of the heating loss in the temperature range of 130° to 550° C. The organic chloride may be selected from chloride-containing polymers and cyclo-organic chlorides. Chlorinated polymeric material may be selected from polyvinyl chlorides, polyvinyldene chloride resins, chlorinated paraffins and chlorinated polyolefins.
Inventors
- 👤 Noriaki Matsushima
- 👤 Yukio Saeki
- 👤 Hajime Kirabayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:59
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/02; C08K5/03; B; B22; B22C; B22C1/00; B22C1/02; B22C1/16; B22C1/20; B22C1/22; B22C1/2233; B22C1/2246; B22C1/2253; C08L; C08L61/00; C08L61/04; C08L61/06; C08L57/00; C08L57/06; C08L57/08; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
114 words
A resin-coated foundry sand for shell-molding operations comprising foundry aggregates coated with a lubricant-containing phenolic resin and one or more organic chlorides, said chlorides characterized by a 20% weight of heating loss in the range of 130°-550° C. said organic chlorides selected from: (a) chlorine containing polymers having the following formula in the main chain: ##STR3## where: X is selected from H, Cl and alkyl group Y is selected from H, Cl, phenyl and alkyl group n is an integer, 2 or greater, or (b) cyclo-organic chloride compounds; and the proportion of organic chlorides to lubricant-containing phenolic resin is from about 0.1 part to about 50 parts organic chlorides to 100 parts phenolic resin.
Claim 2
Dependent Claim
114 words
A resin-coated foundry sand for shell-molding operations comprising foundry aggregates coated with a lubricant-containing phenolic resin and one or more organic chlorides, said chlorides characterized by a 20% weight of heating loss in the range of 130°-550° C. said organic chlorides selected from: (a) chlorine containing polymers having the following formula in the main chain: ##STR3## where: X is selected from H, Cl and alkyl group Y is selected from H, Cl, phenyl and alkyl group n is an integer, 2 or greater, or (b) cyclo-organic chloride compounds; and the proportion of organic chlorides to lubricant-containing phenolic resin is from about 0.1 part to about 50 parts organic chlorides to 100 parts phenolic resin.
Claim 3
Dependent Claim
21 words
A resin-coated foundry sand according to claim 1, wherein the chlorine-containing polymers are selected from polyvinyl chloride resins or PVC-copolymer resins.
Claim 4
Dependent Claim
15 words
A resin-coated foundry sand according to claim 1, wherein the chlorine-containing polymers are chlorinated paraffins.
Claim 5
Dependent Claim
15 words
A resin-coated foundry sand according to claim 1, wherein the chlorine-containing polymers are chlorinated polyolefins.
Claim 6
Dependent Claim
15 words
A resin-coated foundry sand according to claim 1, wherein the cyclo-organic compound is dodecachloro-dodecahydrodimethone-benzo cyclo-octene.
Claim 7
Dependent Claim
18 words
A resin-coated foundry sand according to claim 1, wherein the lubricant-containing phenolic resin is a novolac phenolic resin.
Claim 8
Dependent Claim
18 words
A resin-coated foundry sand according to claim 1, wherein the lubricant-containing phenolic resin is a resole phenolic resin.
Claim 9
Dependent Claim
24 words
A resin-coated foundry sand according to claim 1, wherein the lubricant-containing phenolic resin is a mixture of a novolac and a resole phenolic resin.
Claim 10
Independent Claim
114 words
A method for producing resin-coated foundry sand comprising coating foundry aggregates with a lubricant-containing phenolic resin and one or more organic chlorides, said organic chloride characterized by a 20% weight of heating loss in the range of 130°-550° C., said organic chlorides selected from: (a) chlorine containing polymers having the following in the main chain: ##STR4## wherein: X is selected from H, Cl and alkyl groups Y is selected from H, Cl, phenyl and alkyl group n is an integer, 2 or greater, or (b) cyclo-organic chloride compounds; and the proportion of organic chlorides to lubricant-containing phenolic resin is from about 0.1 part to about 50 parts organic chlorides to 100 parts phenolic resin.
Claim 11
Independent Claim
114 words
A method for producing resin-coated foundry sand comprising coating foundry aggregates with a lubricant-containing phenolic resin and one or more organic chlorides, said organic chloride characterized by a 20% weight of heating loss in the range of 130°-550° C., said organic chlorides selected from: (a) chlorine containing polymers having the following in the main chain: ##STR4## wherein: X is selected from H, Cl and alkyl groups Y is selected from H, Cl, phenyl and alkyl group n is an integer, 2 or greater, or (b) cyclo-organic chloride compounds; and the proportion of organic chlorides to lubricant-containing phenolic resin is from about 0.1 part to about 50 parts organic chlorides to 100 parts phenolic resin.
Claim 12
Dependent Claim
23 words
A method for producing resin-coated foundry sand according to claim 9, wherein the chlorine-containing polymers are selected from polyvinylchloride resins and PVC-copolymer resins.
Claim 13
Dependent Claim
18 words
A method for producing resin-coated foundry sand according to claim 9, wherein the chlorine-containing polymers are chlorinated paraffins.
Claim 14
Dependent Claim
18 words
A method for producing resin-coated foundry sand according to claim 9, wherein the chlorine-containing polymers are chlorinated polyolefins.
Claim 15
Dependent Claim
18 words
A method for producing resin-coated foundry sand according to claim 9, wherein the cyclo-organic compound is dodecachloro-dodecahydro-dimethone-dibenzo cyclo-octene.
Claim 16
Dependent Claim
21 words
A method for producing resin-coated foundry sand according to claim 9, wherein the lubricant-containing phenolic resin is a novolac phenolic resin.
Claim 17
Dependent Claim
21 words
A method for producing resin-coated foundry sand according to claim 10, wherein the lubricant-containing phenolic resin is a novolac phenolic resin.
Claim 18
Dependent Claim
21 words
A method for producing resin-coated foundry sand according to claim 11, wherein the lubricant-containing phenolic resin is a novolac phenolic resin.
Claim 19
Dependent Claim
21 words
A method for producing resin-coated foundry sand according to claim 12, wherein the lubricant-containing phenolic resin is a novolac phenolic resin.
Claim 20
Dependent Claim
21 words
A method for producing resin-coated foundry sand according to claim 13, wherein the lubricant-containing phenolic resin is a novolac phenolic resin.
Claim 21
Dependent Claim
21 words
A method for producing resin-coated foundry sand according to claim 9, wherein the lubricant-containing phenolic resin is a resole phenolic resin.
Claim 22
Dependent Claim
21 words
A method for producing resin-coated foundry sand according to claim 10, wherein the lubricant-containing phenolic resin is a resole phenolic resin.
Claim 23
Dependent Claim
21 words
A method for producing resin-coated foundry sand according to claim 11, wherein the lubricant-containing phenolic resin is a resole phenolic resin.
Claim 24
Dependent Claim
21 words
A method for producing resin-coated foundry sand according to claim 12, wherein the lubricant-containing phenolic resin is a resole phenolic resin.
Claim 25
Dependent Claim
21 words
A method for producing resin-coated foundry sand according to claim 13, wherein the lubricant-containing phenolic resin is a resole phenolic resin.
Claim 26
Dependent Claim
28 words
A method for producing resin-coated foundry sand according to claim 9, wherein the lubricant coated phenolic resin is a mixture of a novolac and a resole phenolic resin.
Claim 27
Dependent Claim
28 words
A method for producing resin-coated foundry sand according to claim 10, wherein the lubricant coated phenolic resin is a mixture of a novolac and a resole phenolic resin.
Claim 28
Dependent Claim
28 words
A method for producing resin-coated foundry sand according to claim 11, wherein the lubricant coated phenolic resin is a mixture of a novolac and a resole phenolic resin.
Claim 29
Dependent Claim
28 words
A method for producing resin-coated foundry sand according to claim 12, wherein the lubricant coated phenolic resin is a mixture of a novolac and a resole phenolic resin.
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) | 1987-06-05 | 1987-12-05 | 1988-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-05 | 1991-12-05 | 1992-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-05 | 1995-12-05 | 1996-06-05 | $7700.00 | Window Closed / Lapsed |