Patent US4876294A successfully refreshed from Google Patents.
US4876294A
Expired / Lapsed
US
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Foundry binder systems based upon acrylated epoxy resins and epoxy resins
Assignee: Ashland LLC
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Filing: 1988-09-13
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Granted: 1989-10-24
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Expires: 2008-09-13
Abstract
Abstract The subject invention relates to foundry binder systems, which are cured with gaseous sulfur dioxide, comprising as separate components: 1. a blend of an acrylated epoxy resin and a monoester solvent and; 2. an organic solvent; and a blend of an epoxy resin and an aromatic hydrocarbon solvent which is part of component (a), (b), or both. The invention also relates to the use of the foundry binder systems to prepare foundry mixes, foundry shapes, and metal articles.
Inventors
- 👤 H. Randall Shriver
- 👤 William R. Dunnavant
- 👤 Bruce A. Gruber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:36
CPC Classifications
C; C08; C08F; C08F299/00; C08F299/02; C08F299/026; B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2233; B22C1/226; C04; C04B; C04B26/00; C04B26/02; C04B26/10; C04B26/14; C04B40/00; C04B40/02; C08L; C08L63/00; C08L63/10; C04B2111/00; C04B2111/00474; C04B2111/0087
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
55 words
A foundry binder system which will cure in the presence of sulfur dioxide comprising as separate components: (a) a blend of an acrylated epoxy resin and a monoester solvent; and (b) an oxidizing agent; and a blend of an epoxy resin and an aromatic hydrocarbon solvent which is part of component (a), (b), or both.
Claim 2
Dependent Claim
55 words
A foundry binder system which will cure in the presence of sulfur dioxide comprising as separate components: (a) a blend of an acrylated epoxy resin and a monoester solvent; and (b) an oxidizing agent; and a blend of an epoxy resin and an aromatic hydrocarbon solvent which is part of component (a), (b), or both.
Claim 3
Dependent Claim
26 words
The system of claim 1 wherein the solvents in component (a) are present in amounts sufficient to result in a viscosity of less than 300 centipoise.
Claim 4
Dependent Claim
35 words
The system of claim 2 wherein the amount of aromatic solvent present in both components is from 10 to 20 weight percent based upon the total weight of the acrylated epoxy resin and epoxy resin.
Claim 5
Dependent Claim
16 words
The system of claim 3 wherein component (a), (b), or both contain a dibasic ester solvent.
Claim 6
Dependent Claim
33 words
The system of claim 4 wherein the dibasic ester is an ester of aliphatic or aromatic dicarboxylic acid and wherein the alkyl group of the ester contains from six to twelve carbon atoms.
Claim 7
Dependent Claim
36 words
The system of claim 6 wherein the amount of dibasic ester solvent present in both components is from 1 to 10 weight percent based upon the total weight of the acrylated epoxy resin and epoxy resin.
Claim 8
Dependent Claim
32 words
The system of claim 6 wherein the oxidizing agent is present in an amount of 10 to 25 weight percent based upon the total weight of acrylated epoxy resins and epoxy resin.
Claim 9
Dependent Claim
25 words
A foundry mix comprising: (a) a major amount of foundry aggregate; and (b) an effective bonding amount of the foundry binder system of claim 1.
Claim 10
Dependent Claim
25 words
A foundry mix comprising: (a) a major amount of foundry aggregate; and (b) an effective bonding amount of the foundry binder system of claim 2.
Claim 11
Dependent Claim
25 words
A foundry mix comprising: (a) a major amount of foundry aggregate; and (b) an effective bonding amount of the foundry binder system of claim 3.
Claim 12
Dependent Claim
25 words
A foundry mix comprising: (a) a major amount of foundry aggregate; and (b) an effective bonding amount of the foundry binder system of claim 4.
Claim 13
Dependent Claim
25 words
A foundry mix comprising: (a) a major amount of foundry aggregate; and (b) an effective bonding amount of the foundry binder system of claim 5.
Claim 14
Dependent Claim
25 words
A foundry mix comprising: (a) a major amount of foundry aggregate; and (b) an effective bonding amount of the foundry binder system of claim 6.
Claim 15
Dependent Claim
25 words
A foundry mix comprising: (a) a major amount of foundry aggregate; and (b) an effective bonding amount of the foundry binder system of claim 7.
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) | 1992-10-23 | 1993-04-24 | 1993-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-23 | 1997-04-24 | 1997-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-23 | 2001-04-24 | 2001-10-24 | $7700.00 | Window Closed / Lapsed |