Patent US4074446A successfully refreshed from Google Patents.
US4366303A
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Particulate resoles with improved cure rate and sinter resistance
Assignee: Union Carbide Corp
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Filing: 1981-12-11
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Granted: 1982-12-28
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Expires: 2001-12-11
Abstract
Abstract Particulate resoles are produced by mixing phenol, formaldehyde and amine in an aqueous medium containing a protective colloid. The resoles exhibit improved cure rate and sinter resistance when an alkaline compound is added to the reaction mixture after particulate formation.
Inventors
- 👤 Peter W. Kopf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:59
CPC Classifications
C; C08; C08G; C08G14/00; C08G14/02; C08G14/04; C08G14/06; C08G8/00; C08G8/04; C08G8/08; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31957; Y10T428/3196
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
112 words
A process for producing a particulate, resole resin comprising the steps of: (a) reacting (1) formaldehyde, (2) a phenol, and (3) an effective amount of hexamethylenetetramine or a compound containing amino hydrogen, or mixtures thereof; in an aqueous medium containing an effective amount of a protective colloid, for a period of time sufficient to produce a particulate, resole resin dispersed in the aqueous medium; (b) cooling the reactive mixture to below about 40° C.; (c) reacting the cooled reaction mixture with an alkaline compound for a period of time sufficient to produce a treated resin exhibiting increased cure rates and increased sinter resistance; and (d) recovering the resin from the aqueous dispersion.
Claim 2
Dependent Claim
112 words
A process for producing a particulate, resole resin comprising the steps of: (a) reacting (1) formaldehyde, (2) a phenol, and (3) an effective amount of hexamethylenetetramine or a compound containing amino hydrogen, or mixtures thereof; in an aqueous medium containing an effective amount of a protective colloid, for a period of time sufficient to produce a particulate, resole resin dispersed in the aqueous medium; (b) cooling the reactive mixture to below about 40° C.; (c) reacting the cooled reaction mixture with an alkaline compound for a period of time sufficient to produce a treated resin exhibiting increased cure rates and increased sinter resistance; and (d) recovering the resin from the aqueous dispersion.
Claim 3
Dependent Claim
16 words
The process of claim 1 wherein the alkaline compound is alkali or alkaline earth metal hydroxide.
Claim 4
Dependent Claim
15 words
The process of claim 2 wherein the alkaline compound is sodium hydroxide or potassium hydroxide.
Claim 5
Dependent Claim
15 words
A particulate, resole resin produced by the process according to claims 1, 2 or 3.
Claim 6
Dependent Claim
103 words
A particulate, resole resin comprising the product of: (1) formaldehyde; (2) a phenol; and (3) an effective amount of hexamethylenetetramine or a compound containing amino hydrogen, or mixtures thereof; which is produced in an aqueous medium containing an effective amount of a protective colloid, for a period of time sufficient to produce a particulate, resole resin dispersed in the aqueous medium; said particulate resole resin being cooled to below about 40° C.; and wherein a sufficient amount of hydroxyl groups in the resin have been converted to form alkaline phenates to produce a treated resin exhibiting increased cure rates and increased sinter resistance.
Claim 7
Dependent Claim
103 words
A particulate, resole resin comprising the product of: (1) formaldehyde; (2) a phenol; and (3) an effective amount of hexamethylenetetramine or a compound containing amino hydrogen, or mixtures thereof; which is produced in an aqueous medium containing an effective amount of a protective colloid, for a period of time sufficient to produce a particulate, resole resin dispersed in the aqueous medium; said particulate resole resin being cooled to below about 40° C.; and wherein a sufficient amount of hydroxyl groups in the resin have been converted to form alkaline phenates to produce a treated resin exhibiting increased cure rates and increased sinter resistance.
Claim 8
Dependent Claim
17 words
The particulate, resole resin of claim 5 wherein the alkaline phenates are sodium phenate or potassium phenate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |