Patent US1373010A successfully refreshed from Google Patents.
Patent US4806576A successfully refreshed from Google Patents.
US4806576A
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US
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Curable epoxy resin compositions and use in preparing formed, shaped, filled bodies
Assignee: Ineos Composites IP LLC
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Filing: 1987-09-11
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Granted: 1989-02-21
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Expires: 2007-09-11
Abstract
Abstract Curable epoxy resin compositions are described which comprise a mixture of an acid curable epoxy resin and a minor amount of an oxidizing agent capable of reacting with sulfur dioxide to form a catalyst for curing said epoxy resin. The curable epoxy resin composition may contain solid particulate materials. The procedures for curing such epoxy resins as well as methods for forming sand cores and molds also are described. Sand cores and molds produced in accordance with the method of the invention have sufficient strength and hardness after a few seconds of curing for normal foundry applications.
Inventors
- 👤 Wayne D. Woodson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:50
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2206; B22C1/222; B22C1/2233; B22C1/224; B22C1/2246; B22C1/226; C08L; C08L63/00
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
70 words
A curable binder composition comprising a mixture of (a) a major amount of a free radical curable ethylenically unsaturated binder material, (b) from 30 percent to 50 percent by weight of an epoxy resin, and (c) an oxidizing agent capable of reacting with sulfur dioxide to form a catalyst for curing said resin mixture, said percent by weight of (b) being based upon the total weight of (a) and (b).
Claim 2
Dependent Claim
70 words
A curable binder composition comprising a mixture of (a) a major amount of a free radical curable ethylenically unsaturated binder material, (b) from 30 percent to 50 percent by weight of an epoxy resin, and (c) an oxidizing agent capable of reacting with sulfur dioxide to form a catalyst for curing said resin mixture, said percent by weight of (b) being based upon the total weight of (a) and (b).
Claim 3
Dependent Claim
12 words
The composition of claim 1 wherein the oxidizing agent is a peroxide.
Claim 4
Dependent Claim
43 words
The composition of claim 1 wherein the epoxy resin is selected from the group consisting of (1) mixed aliphatic-aromatic epoxy resins derived from a bis(hydroxy-aromatic) alkane or a tetrakis(hydroxy-aromatic) akane with a halogen-substituted aliphatic epoxide, (2) novolac resins, and (3) aliphatic epoxy resins.
Claim 5
Dependent Claim
14 words
The composition of claim 3 wherein the ethylenically unsaturated binder material is a monomer.
Claim 6
Dependent Claim
18 words
The composition of claim 4 wherein the ethylenically unsaturated monomer is a monofunctional, diffunctional, trifunctional or tetrafunctional acrylate.
Claim 7
Dependent Claim
21 words
The compositions of claim 5 wherein the epoxy resin is a glycidyl ether of bisphenol A, B, F, G, or H.
Claim 8
Dependent Claim
30 words
The composition of claim 6 wherein the peroxide is methyl ethyl ketone peroxide, cumene hydroperoxide, paramenthane hydroperoxide, t-butyl hydroperoxide, diisopropyl benzene hydroperoxide, admixtures thereof or admixtures thereof with hydrogen peroxide.
Claim 9
Dependent Claim
90 words
A curable molding composition comprising a mixture of a major amount of a solid particulate material, and a minor amount of a binder composition comprising a mixture of (a) a major amount of a free radical curable ethylenically unsaturated binder material, (b) from 30 percent to 50 percent by weight of an epoxy resin, and (c) an oxidizing agent capable of reacting with sulfur dioxide to form a catalyst for curing said resin mixture, said percent by weight of (b) being based upon the total weight of (a) and (b).
Claim 10
Dependent Claim
90 words
A curable molding composition comprising a mixture of a major amount of a solid particulate material, and a minor amount of a binder composition comprising a mixture of (a) a major amount of a free radical curable ethylenically unsaturated binder material, (b) from 30 percent to 50 percent by weight of an epoxy resin, and (c) an oxidizing agent capable of reacting with sulfur dioxide to form a catalyst for curing said resin mixture, said percent by weight of (b) being based upon the total weight of (a) and (b).
Claim 11
Dependent Claim
12 words
The composition of claim 8 wherein the oxidizing agent is a peroxide.
Claim 12
Dependent Claim
44 words
The molding composition of claim 9 wherein the epoxy resin is selected from the group consisting of (1) mixed aliphatic-aromatic epoxy resins derived from a bis(hydroxy-aromatic) alkane or a tetrakis(hydroxy-aromatic) alkane with a halogen-substituted aliphatic epoxide, (2) novolac resins, and (3) aliphatic epoxy resins.
Claim 13
Dependent Claim
14 words
The composition of claim 10 wherein the ethylenically unsaturated binder material is a monomer.
Claim 14
Dependent Claim
18 words
The composition of claim 11 wherein the ethylenically unsaturated monomer is a monofunctional, difunctional, trifunctional or tetrafunctional acrylate.
Claim 15
Dependent Claim
21 words
The composition of claim 12 wherein the epoxy resin is a glycidyl ether of bisphenol A, B, F, G, or H.
Claim 16
Dependent Claim
30 words
The composition of claim 13 wherein the peroxide is methyl ethyl ketone peroxide, cumene hydroperoxide, paramenthane hydroperoxide, t-butyl hydroperoxide, diisopropyl benzene hydroperoxide, admixtures thereof or admixtures thereof with hydrogen peroxide.
Claim 17
Dependent Claim
14 words
The composition of claim 14 wherein the solid particulate filler comprises inorganic abrasive particles.
Claim 18
Dependent Claim
12 words
The composition of claim 15 wherein the solid particulate filler comprises sand.
Claim 19
Independent Claim
100 words
A method of curing binder compositions containing at least one epoxy resin which comprises the steps of (a) preparing a mixture curable with gaseous sulfur dioxide comprising (i) a major amount of a free radical curable ethylencially unsaturated binder material, (ii) from 30 percent to 50 percent by weight an epoxy resin, and (iii) an oxidizing agent capable of reacting with sulfur dioxide to form a catalyst for curing said resin mixture, said percent by weight of (a) (ii) being based upon the total weight of (a) (i) and (a) (ii), and (b) contacting said mixture with gaseous sulfur dioxide.
Claim 20
Independent Claim
100 words
A method of curing binder compositions containing at least one epoxy resin which comprises the steps of (a) preparing a mixture curable with gaseous sulfur dioxide comprising (i) a major amount of a free radical curable ethylencially unsaturated binder material, (ii) from 30 percent to 50 percent by weight an epoxy resin, and (iii) an oxidizing agent capable of reacting with sulfur dioxide to form a catalyst for curing said resin mixture, said percent by weight of (a) (ii) being based upon the total weight of (a) (i) and (a) (ii), and (b) contacting said mixture with gaseous sulfur dioxide.
Claim 21
Dependent Claim
12 words
The method of claim 17 wherein the oxidizing agent is a peroxide.
Claim 22
Dependent Claim
43 words
The method of claim 18 wherein the epoxy resin is selected from the group consisting of (1) mixed aliphatic-aromatic epoxy resins derived from a bis(hydroxy-aromatic) alkane or a tetrakis(hydroxy-aromatic) alkane with a halogen-substituted aliphatic epoxide, (2) novolac resins, and (3) aliphatic epoxy resins.
Claim 23
Dependent Claim
14 words
The method of claim 19 wherein the ethylenically unsaturated binder material is a monomer.
Claim 24
Dependent Claim
18 words
The composition of claim 20 wherein the ethylenically unsaturated monomer is a monofunctional, difunctional, trifunctional or tetrafunctional acrylate.
Claim 25
Dependent Claim
21 words
The method of claim 21 wherein the epoxy resin is a glycidyl ether of bisphenol A, B, F, G, or H.
Claim 26
Dependent Claim
30 words
The method of claim 22 wherein said peroxide is methyl ethyl ketone peroxide, cumene hydroperoxide, paramenthane hydroperoxide, t-butyl hydroperoxide, diisopropyl benzene hydroperoxide, admixtures thereof or admixtures thereof with hydrogen peroxide.
Claim 27
Dependent Claim
38 words
The method of claim 20 wherein the mixture is contacted with sulfur dioxide for a period of from a fraction of a second to about five minutes at a temperature of from ambient temperature to about 150° C.
Claim 28
Independent Claim
143 words
A method of forming foundry's shapes which comprises the steps of (a) mixing a major amount of solid particulate material with a minor amount of a binder composition comprising a mixture of (i) a major amount of a free radical curable ethylenically unsaturated binder material, (ii) from 30 percent to 50 percent by weight of an epoxy resin, said percent by weight of (a) (ii) being based upon the total weight of (a) (i) and (a) (ii), and (iii) an oxidizing agent capable of reacting with sulfur dioxide to form a catalyst for curing said mixture, (b) forming said mixture into the desired shape, and (c) contacting said formed mixture with sulfur dioxide for a period of from a fraction of a second to about five minutes at a temperature of from room temperature to about 150 degrees C. to effect resin cure.
Claim 29
Independent Claim
143 words
A method of forming foundry's shapes which comprises the steps of (a) mixing a major amount of solid particulate material with a minor amount of a binder composition comprising a mixture of (i) a major amount of a free radical curable ethylenically unsaturated binder material, (ii) from 30 percent to 50 percent by weight of an epoxy resin, said percent by weight of (a) (ii) being based upon the total weight of (a) (i) and (a) (ii), and (iii) an oxidizing agent capable of reacting with sulfur dioxide to form a catalyst for curing said mixture, (b) forming said mixture into the desired shape, and (c) contacting said formed mixture with sulfur dioxide for a period of from a fraction of a second to about five minutes at a temperature of from room temperature to about 150 degrees C. to effect resin cure.
Claim 30
Dependent Claim
12 words
The method of claim 25 wherein the oxidizing agent is a peroxide.
Claim 31
Dependent Claim
43 words
The method of claim 26 wherein the epoxy resin is selected from the group consisting of (1) mixed aliphatic-aromatic epoxy resins derived fromm a bis(hydroxy-aromatic) alkane or a tetrakis(hydroxy-aromatic) alkane with a halogen-substituted aliphatic epoxide, (2) novolac resins, and (3) aliphatic epoxy resins.
Claim 32
Dependent Claim
14 words
The method of claim 27 wherein the ethylenically unsaturated binder material is a monomer.
Claim 33
Dependent Claim
18 words
The method of claim 28 wherein the ethylenically unsaturated monomer is a monofunctional, difunctional, triflunctional or tetrafunctional acrylate.
Claim 34
Dependent Claim
21 words
The method of claim 29 wherein the epoxy resin is a glycidyl ether of bisphenol A, B, F, G, or H.
Claim 35
Dependent Claim
30 words
The method of claim 30 wherein the peroxide is methyl ethyl ketone peroxide, cumene hydroperoxide, paramenthane hydroperoxide, t-butyl hydroperoxide, diisopropyl benzene hydroperoxide, admixtures thereof or admixtures thereof with hydrogen peroxide.
Claim 36
Dependent Claim
12 words
The method of claim 31 wherein the solid particulate material is sand.
Claim 37
Dependent Claim
27 words
The method of claim 32 wherein the formed shape, after contact with sulfur dioxide, is purged with air or inert gas and baked at an elevated temperature.
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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) | 1992-02-21 | 1992-08-22 | 1993-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-21 | 1996-08-22 | 1997-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-21 | 2000-08-22 | 2001-02-21 | $7700.00 | Window Closed / Lapsed |