US4083823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
No-bake foundry binder system
Assignee: Occidental Chemical Corp
•
Filing: 1975-03-12
•
Granted: 1978-04-11
•
Expires: 1995-03-12
Abstract
Abstract A no-bake foundry binder system comprises an alkali metal silicate binder and a hydroxy-terminated polyester.
Inventors
- 👤 James R. Welcome, deceased
- 👤 administratrix by Elizabeth M. Welcome
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:17
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24; C04B28/26; B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2233; B22C1/2266; C08; C08K; C08K3/00; C08K3/34; C04B2111/00; C04B2111/00474; C04B2111/00939
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
75 words
A no-bake process for bonding discrete solid particles consisting essentially of admixing said particles with a liquid alkali metal silicate and a hydroxy-terminated polyester resin of a polycarboxylic compound and a polyhydric alcohol and having a hydroxyl number of at least about 50, continuing the mixing of the resulting mixture to coat said particles, and curing the resulting moldable composition by reacting the alkali metal silicate with the hydroxy-terminated polyester to produce a shaped article.
Claim 2
Dependent Claim
75 words
A no-bake process for bonding discrete solid particles consisting essentially of admixing said particles with a liquid alkali metal silicate and a hydroxy-terminated polyester resin of a polycarboxylic compound and a polyhydric alcohol and having a hydroxyl number of at least about 50, continuing the mixing of the resulting mixture to coat said particles, and curing the resulting moldable composition by reacting the alkali metal silicate with the hydroxy-terminated polyester to produce a shaped article.
Claim 3
Dependent Claim
32 words
The process of claim 1 wherein the discrete solid particles are foundry aggregate, and wherein the polyester resin has an acid number of about 1-50 and a hydroxyl number of about 50-1000.
Claim 4
Dependent Claim
19 words
The process of claim 2 wherein the polyester acid number is about 5-20 and hydroxyl number is about 150-700.
Claim 5
Dependent Claim
38 words
The process of claim 3 wherein the amount of silicate is about 0.5-5 weight percent based on the weight of the aggregate and the amount of polyester is 0.05-5 weight percent based on the weight of the aggregate.
Claim 6
Dependent Claim
20 words
The process of claim 4 wherein the amount of silicate is about 2-4% and the amount of polyester is 0.1-2.5%.
Claim 7
Dependent Claim
38 words
The process of claim 1 wherein the amount of silicate is about 0.5-5 weight percent based on the weight of the particles and the amount of polyester is 0.05-5 weight percent based on the weight of the particles.
Claim 8
Dependent Claim
37 words
A foundry aggregate composition consisting essentially of a foundry aggregate, liquid alkali metal silicate and a hydroxy-terminated polyester resin of a polycarboxylic compound and a polyhydric alcohol and having a hydroxyl number of at least about 50.
Claim 9
Dependent Claim
37 words
A foundry aggregate composition consisting essentially of a foundry aggregate, liquid alkali metal silicate and a hydroxy-terminated polyester resin of a polycarboxylic compound and a polyhydric alcohol and having a hydroxyl number of at least about 50.
Claim 10
Dependent Claim
38 words
The composition of claim 7 wherein the amount of silicate is about 0.5-5 weight percent based on the weight of the aggregate and the amount of polyester is 0.05-5 weight percent based on the weight of the aggregate.
Claim 11
Dependent Claim
20 words
The composition of claim 8 wherein the amount of silicate is about 2-4% and the amount of polyester is 0.1-2.5%.
Claim 12
Dependent Claim
23 words
The composition of claim 8 wherein the polyester resin has an acid number of about 1-50 and a hydroxyl number of about 50-1000.
Claim 13
Dependent Claim
19 words
The composition of claim 10 wherein the polyester acid number is about 5-20 and hydroxyl number is about 150-700.
Claim 14
Dependent Claim
12 words
The composition of claim 11 wherein the polyhydric alcohol comprises ethylene glycol.
Claim 15
Dependent Claim
14 words
The compositon of claim 12 wherein the polyhydric alcohol comprises ethylene glycol and glycerol.
Claim 16
Dependent Claim
14 words
The composition of claim 12 wherein the polyhydric alcohol comprises ethylene glycol and pentaerythritol.
Claim 17
Dependent Claim
17 words
The composition of claim 12 wherein the polycarboxylic compound comprises succinic anhydride, phthalic anhydride or mixtures thereof.
Claim 18
Dependent Claim
22 words
The composition of claim 11 wherein the polyester comprises the reaction product of succinic anhydride, mixed polymerized acids, ethylene glycol and glycerol.
Claim 19
Dependent Claim
23 words
The composition of claim 11 wherein the polyester comprises the reaction product of succinic anhydride, mixed polymerized acids, ethylene glycol, glycerol and sorbitol.
Claim 20
Dependent Claim
36 words
A no-bake foundry binder system consisting essentially of a liquid alkali metal silicate and a hydroxy-terminated polyester resin of a polycarboxylic compound and a polyhydric alcohol and having a hydroxyl number of at least about 50.
Claim 21
Dependent Claim
36 words
A no-bake foundry binder system consisting essentially of a liquid alkali metal silicate and a hydroxy-terminated polyester resin of a polycarboxylic compound and a polyhydric alcohol and having a hydroxyl number of at least about 50.
Claim 22
Dependent Claim
37 words
The binder system of claim 18 wherein the weight ratio of silicate to polyester is about 50:1 to 3:1 and wherein the polyester has an acid number of about 1-50 and a hydroxyl number of about 50-1000.
Claim 23
Dependent Claim
31 words
The binder system of claim 19 wherein the weight ratio is about 20:1 to 4:1 and wherein the polyester acid number is about 5-20 and the hydroxyl number is about 150-700.
Claim 24
Dependent Claim
14 words
The binder system of claim 20 wherein the alkali metal silicate is sodium silicate.
Claim 25
Dependent Claim
13 words
The binder system of claim 20 wherein the polyhydric alcohol comprises ethylene glycol.
Claim 26
Dependent Claim
15 words
The binder system of claim 21 wherein the polyhydric alcohol comprises ethylene glycol and glycerol.
Claim 27
Dependent Claim
15 words
The binder system of claim 21 wherein the polyhydric alcohol comprises ethylene glycol and pentaerythritol.
Claim 28
Dependent Claim
18 words
The binder system of claim 22 wherein the polycarboxylic compound comprises succinic anhydride, phthalic anhydride or mixtures thereof.
Claim 29
Dependent Claim
23 words
The binder system of claim 21 wherein the polyester comprises the reaction product of succinic anhydride, mixed polymerized acids, ethylene glycol and glycerol.
Claim 30
Dependent Claim
24 words
The binder system of claim 21 wherein the polyester comprises the reaction product of succinic anhydride, mixed polymerized acids, ethylene glycol, glycerol and sorbitol.
References Cited (Backward Citations)
US2214349A
Cited
US2483836A
Cited
US2646410A
Cited
US2664405A
Cited
US3392127A
Cited
US3240736A
Cited
US3297616A
Cited
US3547840A
Cited
US3371712A
Cited
US3978018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-10 | 1981-10-10 | 1982-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-10 | 1985-10-10 | 1986-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-10 | 1989-10-10 | 1990-04-11 | $7700.00 | Window Closed / Lapsed |