US4098770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spray-dried phenolic adhesives
Assignee: Reichhold Ltd
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Filing: 1976-09-15
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Granted: 1978-07-04
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Expires: 1996-09-15
Abstract
Abstract A method of preparing a modified phenol-formaldehyde resin in solid particulate form comprising reacting together, in an aqueous medium, phenol and formaldehyde, in a ratio of 1.0 mole phenol to between 1.8 and 3.5 moles of formaldehyde, in the presence of between 0.1 and 1.0 moles of a basic catalyst; continuing this reaction until a desired viscosity is reached; modifying the reaction system by adding thereto between 0 and 30%, based on the weight of phenol originally taken of a non-phenolic polyhydroxy compound; spray drying the thus modified liquid resin in a pressure nozzle drier, and chilling the spray dried particulate solid. These solid resins are redispersible in water and stable on storage, compared to the known aqueous, equivalent, systems.
Inventors
- 👤 Antoine Berchem
- 👤 Krishan Kumar Sudan
- 👤 Edward Michael Gres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:58
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08G; C08G8/00; C08G8/04; C08G8/08; C08G8/28; C08G8/38; C08K; C08K5/00; C08K5/04; C08L; C08L61/00; C08L61/04; C08L61/06; C08L71/00; C08L71/02; C08J2361/00; C08J2361/04; C08J2361/06; C08J2361/14; C08L3/00; C08L97/00
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
81 words
A method of preparing a phenol-formaldehyde resin in particulate form comprising reacting together, in an aqueous medium, phenol and formaldehyde, in a ratio of 1.0 mole phenol to between 1.8 and 3.5 moles formaldehyde, in the presence of between 0.1 and 1.0 mole of a basic catalyst; continuing this reaction until a desired viscosity is reached; spray-drying the solution or dispersion of phenol-formaldehyde resin thus produced through a pressure nozzle into a heated gas; and chilling the spray dried particulate solid.
Claim 2
Independent Claim
81 words
A method of preparing a phenol-formaldehyde resin in particulate form comprising reacting together, in an aqueous medium, phenol and formaldehyde, in a ratio of 1.0 mole phenol to between 1.8 and 3.5 moles formaldehyde, in the presence of between 0.1 and 1.0 mole of a basic catalyst; continuing this reaction until a desired viscosity is reached; spray-drying the solution or dispersion of phenol-formaldehyde resin thus produced through a pressure nozzle into a heated gas; and chilling the spray dried particulate solid.
Claim 3
Independent Claim
110 words
A method of preparing a modified phenol-formaldehyde resin in solid particulate form comprising reacting together, in an aqueous medium, phenol and formaldehyde in a mole ratio of 1.0 mole phenol to between 1.8 and 3.5 moles of formaldehyde, in the presence of between 0.1 and 1.0 moles of a basic catalyst; continuing this reaction until a desired viscosity is reached; modifying the reaction system by adding thereto between 0% and 30%, based on the weight of phenol originally taken, of a non-phenolic polyhydroxy compound; spray drying the thus-modified solution or dispersion of phenol-formaldehyde resin produced through a pressure nozzle into a heated gas; and chilling the spray dried particulate solid.
Claim 4
Independent Claim
110 words
A method of preparing a modified phenol-formaldehyde resin in solid particulate form comprising reacting together, in an aqueous medium, phenol and formaldehyde in a mole ratio of 1.0 mole phenol to between 1.8 and 3.5 moles of formaldehyde, in the presence of between 0.1 and 1.0 moles of a basic catalyst; continuing this reaction until a desired viscosity is reached; modifying the reaction system by adding thereto between 0% and 30%, based on the weight of phenol originally taken, of a non-phenolic polyhydroxy compound; spray drying the thus-modified solution or dispersion of phenol-formaldehyde resin produced through a pressure nozzle into a heated gas; and chilling the spray dried particulate solid.
Claim 5
Dependent Claim
26 words
Process according to claim 2, wherein the polyhydroxy compound is added to the reaction system after the desired viscosity is reached and before spray drying thereof.
Claim 6
Dependent Claim
16 words
Process according to claim 2 wherein the polyhydroxy compound is incorporated into the initial reaction mixture.
Claim 7
Dependent Claim
13 words
Process according to claim 1, wherein pure or technical grade phenol is used.
Claim 8
Dependent Claim
25 words
Process according to claim 1, wherein the phenol is replaced at least in part by a cresol mixture having a high meta- and para-cresol content.
Claim 9
Dependent Claim
33 words
Process according to claim 1 wherein a technical grade phenol is used, having a boiling range of 180° to 200° C. and containing not more than 15% by weight of ortho-cresol plus xylenols.
Claim 10
Dependent Claim
13 words
Process according to claim 1 wherein an aqueous solution of formaldehyde is used.
Claim 11
Dependent Claim
13 words
Process according to claim 2, wherein pure or technical grade phenol is used.
Claim 12
Dependent Claim
25 words
Process according to claim 2, wherein the phenol is replaced at least in part by a cresol mixture having a high meta- and para-cresol content.
Claim 13
Dependent Claim
33 words
Process according to claim 2 wherein a technical grade phenol is used, having a boiling range of 180° to 200° C. and containing not more than 15% by weight of ortho-cresol plus xylenols.
Claim 14
Dependent Claim
13 words
Process according to claim 2 wherein an aqueous solution of formaldehyde is used.
Claim 15
Dependent Claim
24 words
Process according to claim 2, wherein the polyhydroxy compound is chosen from glycols, polyhydroxy ethers, polyhydric alcohols, sugars, and polymeric hydroxyl groups containing substances.
Claim 16
Dependent Claim
19 words
Process according to claim 13, wherein the polyhydroxy compound is chosen from ethylene glycol, propylene glycol, and butylene glycol.
Claim 17
Dependent Claim
59 words
A product of the process of claim 1 which is a particulate solid phenol-formaldehyde resin obtained by spray drying an aqueous solution or dispersion obtained by reacting together phenol and formaldehyde in a ratio of 1.0 mole phenol to between 1.8 and 3.5 moles of formaldehyde in the presence of from 0.1 to 1.0 mole of a basic catalyst.
Claim 18
Dependent Claim
78 words
A product of the process of claim 2 which is a particulate solid phenol-formaldehyde resin obtained by spray drying an aqueous solution or dispersion obtained by reacting together phenol and formaldehyde in a ratio of 1.0 mole phenol to between 1.8 and 3.5 moles of formaldehyde in the presence of from 0.1 to 1.0 mole of a basic catalyst, also containing between 0 and 30%, based on the weight of phenol originally taken, of a non-phenolic polyhydroxy compound.
Claim 19
Dependent Claim
13 words
A product according to claim 15 prepared from pure or technical grade phenol.
Claim 20
Dependent Claim
13 words
A product according to claim 16 prepared from pure or technical grade phenol.
Claim 21
Dependent Claim
32 words
A product according to claim 15 prepared from a phenols mixture, in which at least part of the phenol is replaced by a cresol mixture having a high meta- and para-cresol content.
Claim 22
Dependent Claim
32 words
A product according to claim 16 prepared from a phenols mixture, in which at least part of the phenol is replaced by a cresol mixture having a high meta- and para-cresol content.
Claim 23
Dependent Claim
33 words
A product according to claim 15 prepared from a technical grade phenol, having a boiling range of 180° to 200° C., and containing not more than 15% by weight of ortho-cresol plus xylenols.
Claim 24
Dependent Claim
33 words
A product according to claim 16 prepared from a technical grade phenol, having a boiling range of 180° to 200° C., and containing not more than 15% by weight of ortho-cresol plus xylenols.
Claim 25
Dependent Claim
27 words
A product according to claim 16, in which the non-phenolic polyhydroxy compound is chosen from glycols, polyhydroxy ethers, polyhydric alcohols, sugars, and polymeric hydroxyl group containing substances.
Claim 26
Dependent Claim
22 words
A product according to claim 16, in which the non-phenolic polyhydroxy compound is chosen from ethylene glycol, propylene glycol, and butylene glycol.
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) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |