Patent US4070334A successfully refreshed from Google Patents.
US4070334A
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Method of bonding
Assignee: Novartis Corp
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Filing: 1975-12-02
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Granted: 1978-01-24
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Expires: 1995-12-02
Abstract
Abstract A method of making a shaped article from particulate solid material, such as a foundry mould or core from sand, comprises I. forming a mixture of the particles and an anaerobically-curing adhesive containing, as a curing accelerator, either an aliphatic amine having at least two primary aliphatic amino groups or a condensation product of such an amine with a ketone or with an aldehyde, Ii. forming the mixture into the desired shape, and Iii. in the presence of water, causing the adhesive to cure and to bond the particles together by displacing air or other oxygen-containing gas in the environment of the shaped article with an inert gas or vapor.
Inventors
- 👤 George Edward Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:49
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/162; Y; Y10; Y10S; Y10S260/00; Y10S260/41
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
102 words
A method of making a shaped article from particulate solid material which comprises i. forming a mixture of the particles and an anaerobically-curing adhesive containing, as a curing accelerator, either an aliphatic amine having at least two primary aliphatic amino groups or a condensation product of such an amine with a ketone or with an aldehyde, ii. forming the mixture into the desired shape, and iii. in the presence of water, causing the adhesive to cure and to bond the particles together by displacing air or other oxygen-containing gas in the environment of the shaped article with an inert gas or vapour.
Claim 2
Independent Claim
102 words
A method of making a shaped article from particulate solid material which comprises i. forming a mixture of the particles and an anaerobically-curing adhesive containing, as a curing accelerator, either an aliphatic amine having at least two primary aliphatic amino groups or a condensation product of such an amine with a ketone or with an aldehyde, ii. forming the mixture into the desired shape, and iii. in the presence of water, causing the adhesive to cure and to bond the particles together by displacing air or other oxygen-containing gas in the environment of the shaped article with an inert gas or vapour.
Claim 3
Dependent Claim
18 words
The method of claim 1, in which the inert gas is nitrogen, a rare gas, or carbon dioxide.
Claim 4
Dependent Claim
28 words
The method of claim 1, in which there is used as most 0.5% by weight of water, calculated on the combined weight of the adhesive and the particles.
Claim 5
Dependent Claim
22 words
The method of claim 1, in which the inert gas or vapour is at a temperature of from 15° to 35° C.
Claim 6
Dependent Claim
31 words
The method of claim 1, in which the water present is imparted to the mixture of the particles and the adhesive by first passing the inert gas or vapour through water.
Claim 7
Dependent Claim
29 words
The method of claim 5, in which the inert gas or vapour contains from 5 to 40 grams of water vapour per cubic meter after passage through the water.
Claim 8
Dependent Claim
27 words
The method of claim 1, in which there is used from 0.5 to 10% by weight of the anerobically-curing adhesive, calculated on the weight of the particles.
Claim 9
Dependent Claim
33 words
The method of claim 1, in which the anerobically-curing adhesive comprises, in addition to the said curing accelerator, a. an ester of an acrylic acid and b. a latent initiator of free-radical polymerisation.
Claim 10
Dependent Claim
26 words
The method of claim 8, in which there is used from 0.01 to 15% by weight of (b), calculated on the weight of the ester (a).
Claim 11
Dependent Claim
29 words
The method of claim 8, in which there is used from 1 to 10% by weight of the said curing accelerator, calculated on the weight of the ester (a).
Claim 12
Dependent Claim
77 words
The method of claim 8, in which the ester (a) is of the general formula ##STR26## where a is an integer of 1 to 8, b is an integer of 1 to 20, c is zero or 1, R denotes --H, --CH 3 , --C 2 H 5 , --CH 2 OH, or ##STR27## each R 1 denotes --H, --Cl, --CH 3 , or --C 2 H 5 , and R 2 denotes --H, --OH, or ##STR28##
Claim 13
Dependent Claim
101 words
The method of claim 8, in which the ester (a) is of the general formula ##STR29## where b is an integer of 1 to 20, c is 0 or 1, d is 0 or a positive integer, provided that c and d are not both zero, e is 1, 2, 3, or 4, each R 1 denotes --H, --Cl, --CH 3 , or --C 2 H 5 , R 2 denotes --H, --OH, or ##STR30## and R 3 denotes an organic radical of valency, e, linked through a carbon atom or carbon atoms thereof to the indicated e terminal oxygen atoms.
Claim 14
Dependent Claim
61 words
The method of claim 8, in which the ester (a) is of the general formula ##STR31## where c is zero or 1, e is 1, 2, 3, or 4, R 4 denotes --H or --CH 3 , and R 5 denotes an organic radical of valency e, linked through a carbon atom other than the carbon atom of a carbonyl group.
Claim 15
Dependent Claim
119 words
The method of claim 8, in which the ester (a) is of the general formula ##STR32## where R 1 denotes --H, --Cl, --CH 3 , or --C 2 H 5 , R 6 denotes a divalent aliphatic, cycloaliphatic, aromatic, or araliphatic group, bound through a carbon atom or carbon atoms thereof to the indicated --O-- atom and --X-- atom or group, X denotes --O--or ##STR33## where R 8 stands for --H or an alkyl radical of from 1 to 8 carbon atoms, g is an integer of at least 2 and at most 6, and R 7 denotes a g-valent aliphatic, cycloaliphatic, aromatic, or araliphatic group, bound through a carbon atom or carbon atoms thereof to the indicated --NH--groups.
Claim 16
Dependent Claim
136 words
The method of claim 8, in which the ester (a) is of the general formula ##STR34## where each R 1 denotes --H, --Cl, --CH 3 , or --C 2 H 5 , each R 9 denotes --H, an alkyl radical of 1 to 6 carbon atoms, a cyano-alkyl radical of 2 to 7 carbon atoms, a hydroxyalkyl radical of 1 to 6 carbon atoms, or an alkyl group of 1 to 6 carbon atoms substituted by a group of formula ##STR35## each R 10 is a divalent aliphatic, aromatic, heterocyclic, or cycloaliphatic residue of 1 to 10 carbon atoms, linking through carbon atoms thereof the indicated nitrogen atoms, j is 0 or 1, and h is 0 or an integer of from 1 to 4, with the proviso than when j represents zero, h represents 1.
Claim 17
Dependent Claim
81 words
The method of claim 8, in which the ester (a) is of the general formula ##STR36## where R 1 denotes --H, --Cl, --CH 3 , or --C 2 H 5 , R 11 denotes --H, --CH 3 , or --CH 2 Cl, and R 12 denotes the residue of an at least dicarboxylic acid after removal of two carboxyl groups, linked through one carbon atom to the indicated group ##STR37## and by an adjacent carbon atom to the indicated -COOH group.
Claim 18
Dependent Claim
72 words
The method of claim 8, in which the ester (a) is of the general formula ##STR38## where each R 1 denotes --H, --Cl, --CH 3 , or --C 2 H 5 , each R 11 denotes --H, --CH 3 , or --CH 2 Cl, and R 13 denotes a tetravalent group containing at least one carbocyclic ring, each indicated pair of groups ##STR39## and --COOH being directly linked to adjacent carbon atoms.
Claim 19
Dependent Claim
43 words
The method of claim 8, in which the ester (a) is of the formula ##STR40## where R 1 denotes --H, --Cl, --CH 3 , or --C 2 H 5 and R 15 denotes --CH 3 , --C 2 H 5 , or ##STR41##
Claim 20
Dependent Claim
14 words
The method of claim 1, in which the latent initiator is a diazonium salt.
Claim 21
Dependent Claim
12 words
The method of claim 1, in which the latent initiator is redox-activatable.
Claim 22
Dependent Claim
15 words
The method of claim 20, in which the initiator is a hydroperoxide or a peroxide.
Claim 23
Dependent Claim
32 words
The method of claim 1, in which the accelerator is of the formula ##STR42## where R 4 denotes --H or --CH 3 and k is an integer of from 1 to 4.
Claim 24
Dependent Claim
19 words
The method of claim 1, in which the accelerator is such a condensation product, free from primary amino groups.
Claim 25
Dependent Claim
36 words
The method of claim 1, in which the condensation product used as the accelerator is of an aliphatic ketone of 3 to 10 carbon atoms or of an aliphatic aldehyde of 2 to 6 carbon atoms.
Claim 26
Dependent Claim
39 words
The method of claim 1, in which the amine, the condensation product of which is used, is of the formula ##STR43## where R 4 denotes --H or --CH 3 and k is an integer of from 1 to 4.
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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) | 1981-01-23 | 1981-07-25 | 1982-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-23 | 1985-07-25 | 1986-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-23 | 1989-07-25 | 1990-01-24 | $7700.00 | Window Closed / Lapsed |