US4076685A
Expired / Lapsed
US
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Cyanoacrylate foundry binders and process
Assignee: Ashland LLC
•
Filing: 1973-01-26
•
Granted: 1978-02-28
•
Expires: 1993-01-26
Abstract
Abstract The invention relates to foundry core or mold compositions containing thermoplastic cyanoacrylate polymer material as binder and to the process for polymerizing the binder so as to set or harden said foundry compositions by eliminating the inhibiting effect of polymerization inhibitors present in the binder.
Inventors
- 👤 Hubert P. Kogler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:25
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2206; B22C1/2213
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
41 words
A foundry mix containing sand as the major constituent and a binding amount of up to 10% based on the weight of the sand of a polymerizable binder comprising a cyanoacrylate and a small but effective amount of a polymerizable inhibitor.
Claim 2
Dependent Claim
41 words
A foundry mix containing sand as the major constituent and a binding amount of up to 10% based on the weight of the sand of a polymerizable binder comprising a cyanoacrylate and a small but effective amount of a polymerizable inhibitor.
Claim 3
Dependent Claim
61 words
A foundry mix according to claim 1 wherein the cyanoacrylate is a cyanoacrylic acid ester monomer of the general formula ##STR3## wherein R stands for an alkyl, cycloalkyl, aralkyl, aryl or alkaryl group of 1-16 carbon atoms or, a polymerizable oligomer of one of the aforementioned cyanoacrylic acid esters or a combination of at least one of said monomers and oligomers.
Claim 4
Dependent Claim
17 words
A foundry mix according to claim 2 wherein said binder contains a Lewis acid as an inhibitor.
Claim 5
Dependent Claim
15 words
A foundry mix according to claim 3 wherein said inhibitor is a volatile Lewis acid.
Claim 6
Dependent Claim
14 words
A foundry mix according to claim 4 wherein said inhibitor is SO 2 .
Claim 7
Dependent Claim
17 words
A foundry mix according to claim 5 wherein said binder is present in about 1-3% by weight.
Claim 8
Dependent Claim
25 words
A foundry mix according to claim 3 wherein said binder contains about 0.001 - 1 wt.% of inhibitor based on the weight of the binder.
Claim 9
Dependent Claim
16 words
A foundry mix according to claim 7 wherein said binder contains about 0.001 - 0.1 wt.%.
Claim 10
Dependent Claim
19 words
A foundry mix according to claim 6 wherein said binder contains about 0.001 - 0.01 wt.% of SO 2
Claim 11
Dependent Claim
15 words
A foundry mix according to claim wherein said binder contains propane sultone as an inhibitor.
Claim 12
Dependent Claim
15 words
A foundry mix according to claim 1 wherein said binder contains hydroquinone as an inhibitor.
Claim 13
Dependent Claim
21 words
A foundry mix according to claim 2 wherein said binder contains a cyanoacrylic acid wherein R contains from 1-6 carbon atoms.
Claim 14
Dependent Claim
24 words
A foundry mix according to claim 2 wherein said binder contains a cyanoacrylic acid ester wherein R is an alkyl of 1-5 carbon atoms.
Claim 15
Dependent Claim
24 words
A foundry mix according to claim 9 wherein said binder contains a cyanoacrylic acid ester wherein R is an alkyl of 1-5 carbon atoms.
Claim 16
Dependent Claim
12 words
A foundry mix according to claim 14 wherein said binder is ethyl-2-cyanoacrylate.
Claim 17
Dependent Claim
52 words
A foundry process for cold-setting of foundry mixes containing sand and a polymerizable binder comprising a cyanoacrylic acid ester and a small but effective amount of a polymerization inhibitor which process comprises placing said foundry mix in a shaping device or equipment and shaping same, then removing or neutralizing the polymerization inhibitor.
Claim 18
Dependent Claim
52 words
A foundry process for cold-setting of foundry mixes containing sand and a polymerizable binder comprising a cyanoacrylic acid ester and a small but effective amount of a polymerization inhibitor which process comprises placing said foundry mix in a shaping device or equipment and shaping same, then removing or neutralizing the polymerization inhibitor.
Claim 19
Dependent Claim
18 words
A foundry process according to claim 16 wherein said inhibitor in said binder is removed by evaporating same.
Claim 20
Dependent Claim
22 words
A foundry process according to claim 17 wherein said inhibitor of said binder is neutralized by gassing same with a Lewis base.
Claim 21
Dependent Claim
16 words
A foundry process according to claim 18 wherein said Lewis base is ammonia or an amine.
Claim 22
Dependent Claim
14 words
A foundry process according to claim 19 wherein said Lewis base is an amine.
Claim 23
Dependent Claim
18 words
A foundry process according to claim 20 wherein said Lewis base is a gaseous or vaporizable tertiary amine.
Claim 24
Dependent Claim
33 words
A foundry process according to claim 21 wherein said amine is present in a carrier gas stream in an amount in the range of about 0.001-5% by volume based on said gas stream.
Claim 25
Dependent Claim
13 words
The foundry process according to claim 22 wherein said carrier gas is air.
Claim 26
Dependent Claim
15 words
The foundry process according to claim 22 wherein said carrier gas is CO 2 .
Claim 27
Dependent Claim
25 words
A foundry process according to claim 17 wherein said inhibitor in said binder of claim 6 is removed by gassing same with a Lewis base.
Claim 28
Dependent Claim
25 words
A foundry process according to claim 17 wherein said inhibitor in said binder of claim 8 is removed by gassing same with a Lewis base.
Claim 29
Dependent Claim
25 words
A foundry process according to claim 17 wherein said inhibitor in said binder of claim 14 is removed by gassing same with a Lewis base.
Claim 30
Dependent Claim
25 words
A foundry process according to claim 17 wherein said inhibitor in said binder of claim 15 is removed by gassing same with a Lewis base.
Claim 31
Dependent Claim
14 words
A foundry process according to claim 22 wherein the Lewis base is trimethyl amine.
Claim 32
Dependent Claim
14 words
A foundry process according to claim 22 wherein the Lewis base is triethyl amine.
Claim 33
Dependent Claim
15 words
A foundry process according to claim 22 wherein the Lewis base is diethyl methyl amine.
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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) | 1981-02-27 | 1981-08-29 | 1982-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-27 | 1985-08-29 | 1986-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-27 | 1989-08-29 | 1990-02-28 | $7700.00 | Window Closed / Lapsed |