US4317901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the production of a powdered phenolic resole resin
Assignee: Formica Corp
•
Filing: 1980-10-06
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Granted: 1982-03-02
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Expires: 2000-10-06
Abstract
Abstract A method for the production of a powdery, free-flowing phenol/formaldehyde resin is disclosed wherein a polyvalent cationic precipitant is added to the resin emulsion produced, the precipitate is filtered, washed with water and dried.
Inventors
- 👤 Harry F. Cosway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:00
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08J3/124; C08G; C08G8/00; C08G8/04; C08G8/08; C08J2361/00; C08J2361/04; C08J2361/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
119 words
A method for the production of a powdery, free-flowing phenol/formaldehyde condensation product which comprises: (a) reacting formaldehyde with phenol in a molar ratio of from about 1.2 to 1 to about 1.6 to 1 respectively, in the presence of an aqueous solution of a catalyst, a surfactant and a protective colloid until a viscous, resin emulsion is formed. (b) adding to the viscous, resin emulsion with agitation, sufficient polyvalent, catonic precipitant to cause the emulsion to pass through a muddy, grainy state to a fluid, mobile condition; (c) fltering the resultant media, (d) washing the resultant filter cake with at least 15 parts of water per part of dry solids therein and (e) recovering the resultant phenol/formaldehyde condensation product.
Claim 2
Independent Claim
119 words
A method for the production of a powdery, free-flowing phenol/formaldehyde condensation product which comprises: (a) reacting formaldehyde with phenol in a molar ratio of from about 1.2 to 1 to about 1.6 to 1 respectively, in the presence of an aqueous solution of a catalyst, a surfactant and a protective colloid until a viscous, resin emulsion is formed. (b) adding to the viscous, resin emulsion with agitation, sufficient polyvalent, catonic precipitant to cause the emulsion to pass through a muddy, grainy state to a fluid, mobile condition; (c) fltering the resultant media, (d) washing the resultant filter cake with at least 15 parts of water per part of dry solids therein and (e) recovering the resultant phenol/formaldehyde condensation product.
Claim 3
Dependent Claim
20 words
A method according to claim 1 wherein the water-washed filter cake is dried in air at room temperature before recovery.
Claim 4
Dependent Claim
14 words
A method according to claim 1 wherein said polyvalent cationic precipitant is aluminum sulfate.
Claim 5
Dependent Claim
23 words
A method according to claim 1 wherein said (a) is conducted at a temperature ranging from about 30° C. to about 110° C.
Claim 6
Dependent Claim
11 words
A method according to claim 1 wherein said catalyst is ammonia.
Claim 7
Dependent Claim
29 words
A method according to claim 1 wherein said polyvalent cationic precipitant is employed in a concentration of at least 0.5%, by weight, based on the weight of phenol employed.
References Cited (Backward Citations)
US1150642A
Cited
US1197171A
Cited
US1697885A
Cited
US1807545A
Cited
US2371915A
Cited
US2424787A
Cited
US2690393A
Cited
US2744875A
Cited
GB1347878A
Cited
US4281098A
Cited
US4269949A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-03-01 | 1985-08-31 | 1986-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-01 | 1989-08-31 | 1990-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-01 | 1993-08-31 | 1994-03-02 | $7700.00 | Window Closed / Lapsed |