US4094834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
ABS-formaldehyde novolak
Assignee: SI Group Inc
•
Filing: 1975-11-25
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Granted: 1978-06-13
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Expires: 1995-11-25
Abstract
Abstract An acrylonitrile-butadiene-styrene terpolymer is added to a phenol formaldehyde novolak to produce a mixture which materially increases the resistance to peelback as compared to the phenol formaldehyde novolak alone when used as a shell process foundry resin.
Inventors
- 👤 Lewis H. Bowers
- 👤 Raymond E. Jankowski
- 👤 John L. Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:22
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; C; C09; C09J; C09J161/00; C09J161/04; C09J161/06; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/04; C08L55/00; C08L55/02; Y; Y10; Y10S; Y10S525/00; Y10S525/942
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
46 words
A composition suitable for use as a shell process foundry flake resin comprising a blend of a phenol-formaldehyde novolak containing 0.70 to 0.83 moles of formaldehyde per mole of phenol and 1 to 20% of an acrylonitrile-butadiene-styrene terpolymer resin based on the phenol in the novolak.
Claim 2
Dependent Claim
46 words
A composition suitable for use as a shell process foundry flake resin comprising a blend of a phenol-formaldehyde novolak containing 0.70 to 0.83 moles of formaldehyde per mole of phenol and 1 to 20% of an acrylonitrile-butadiene-styrene terpolymer resin based on the phenol in the novolak.
Claim 3
Dependent Claim
19 words
A composition according to claim 1, wherein the terpolymer is 1 to 10% of the phenol in the novolak.
Claim 4
Dependent Claim
20 words
A composition according to claim 2, wherein the amount of formaldehyde is 0.72 to 0.80 mole per mole of phenol.
Claim 5
Dependent Claim
9 words
A composition according to claim 2 including salicylic acid.
Claim 6
Dependent Claim
9 words
A composition according to claim 4 including calcium stearate.
Claim 7
Dependent Claim
60 words
A process of preparing a composition suitable for coating foundry sand comprising forming a novolak from phenol and formaldehyde in the presence of an acid catalyst, adding an acrylonitrile-butadiene-styrene terpolymer resin in an amount of 1 to 10% of the phenol prior to the completion of the formation of the novolak and adding salicylic acid after formation of the novolak.
Claim 8
Dependent Claim
60 words
A process of preparing a composition suitable for coating foundry sand comprising forming a novolak from phenol and formaldehyde in the presence of an acid catalyst, adding an acrylonitrile-butadiene-styrene terpolymer resin in an amount of 1 to 10% of the phenol prior to the completion of the formation of the novolak and adding salicylic acid after formation of the novolak.
Claim 9
Dependent Claim
18 words
A process according to claim 6 including the step of adding calcium stearate after formation of the novolak.
Claim 10
Dependent Claim
23 words
A composition according to claim 1 which has been made by adding the terpolymer prior to completion of the formation of the novolak.
Claim 11
Dependent Claim
19 words
A composition according to claim 8 wherein the terpolymer is 1 to 10% of the phenol in the novolak.
References Cited (Backward Citations)
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US3020254A
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US3586735A
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US3817976A
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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) | 1981-06-12 | 1981-12-12 | 1982-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-12 | 1985-12-12 | 1986-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-12 | 1989-12-12 | 1990-06-13 | $7700.00 | Window Closed / Lapsed |